Mold Design Digest

Mold Design Digest http://blog.tvdramazone.com/blog/27 molddesign 2010-01-09T23:37:18Z The reason and prevention measure of the molding tool expiration http://blog.tvdramazone.com/post/27/277 The molding tool usually the expiration of various different circumstance happens during the period of producing application, a great deal of wasted manpower, material resources, influenced production progress.The reason and prevention measure of a few basic expiration forms and expiration that mainly relate a molding tool as follows. First, Molding tool is expired Cold hot molding tool in the middle of undergoing military service the expired basic form can is divided into:The Su transforms;Wear away;Tired;Split. (1)The Su transforms. The Su transforms namely bear carry is bigger than to accept defeat transforming of strength but creation.Fall to sink such as the cave mold appeared chamber, type bore the extension and sharp angle tumble down to sink and the convex mold appears Dun thick, lengthways bent etc..Particularly hot make a molding tool, it works surface and heat material contact, the made chamber surface temperature usually exceeds heat to make the returning of molding tool steel fire temperature, type the wall inside the slot is collapsed under pressure or press a heap because of softening.When the low Cui deeply sexual steel kind was used to a cold Dun mold, molding tool after the Cui fire heats, to inside the bore carried on spraying water cooling to produce a hardening layer.Molding tool while using, such as the cold Dun dint lead greatly, hardening layer underneath of the base anti- press to accept defeat strength not high, the molding tool bore chamber is collapsed under pressure.The molding tool steel accepts defeat strength generally with the content of carbon(c) from the increasing of some metal alloy chemical elementses but go up, in the degree of hardness under the same circumstance, the steel of different chemistry composition has of the anti- press strength different, following 4 kinds of anti-s of steels accept defeat strength while being the steel degree of hardness as 63 HRCs one by one in order in proper order from Gao Dao Di is:The W18 Cr4 V>Cr 12> Cr6 WV>5 CrNiWs. (2)Wear away expiration. Wearing away expiration means that bluntness in the blade door turns, the sharp angle changes circle, flat surface the bottom sinks, surface ditch scar, peeling off glue a film.(in the middle of rubbing molding tool work form but glued some Pis to anticipate metal)Moreover, the convex mold is in the work, because of lubricant burnable after convert into high pressure air, carry on to the convex mold surface violent flush, the formation annoys eclipse. Cold blunt, if carry not and greatly, wear away a type mainly in order to oxidize, wearing away can also match to wear away for biting of a certain degree and be a blade the part change bluntness or blunt press burden a little bit greatly, biting to match a worn circumstance will become serious, but make to wear away speed, the bearing of molding tool steel whets sex to not only be decided by its degree of hardness, but also be decided to the property, size of carburet and distribute with amount, in the molding tool steel, the bearing of high-speed steel and high chrome steel whets sex currently higher.But under the sistuation that exist to there is the carburet that the carburet of severity is partial to Xi or big grain in the steel, these carburets are easily peeling off, but cause to whet a grain to wear away and make to wear away to speed.A little bit lightly cold make a molding tool of the impact of steel(the lamella is blunt to cut, pull to stretch, flection etc.), don't greatly carry a lotus, mainly for quiet wear away.At quiet wear away a condition under, the containing of molding tool steel amount of carbon is many and bear to whet sex big.Under the sistuation that the impact wears away(like cold Dun, cold crowded and hot Duan etc.), the excessive carburet of no help to exaltation bears to whet sex in the molding tool steel, on the contrary because the impact whets a grain to wear away, but lowers to bear to whet sex. The research expresses that under the sistuation that the impact whets a grain to wear away, the molding tool steel contains amount of carbon with O.6% for upper limit, cold Dun mold under the sistuation that the impact carries a lotus work, if the carburet in the molding tool steel is excessive, the easily solid impact wears away but mountain the surface is peeling off now.These peeling off hard grain sons will become whetting a grain and quickly wear away speed.Hot make the type of molding tool of chamber surface, makes to bear to whet sex to lower because the heat softens, oxidize sheet iron to also have the function to whet to anticipate in addition, there is still heat oxidizing to decay a function in the meantime. (3)Tired expiration. Tired characteristic of the expiration:The molding tool some parts has been definitely undergone military service a period and rose small crack, and gradual deeply expand to the Zong, seriously weaken the loading ability of molding tool but cause to split while expanding to the certain size.The tired crack is risen to in response to the dint bigger part, especially in response to dint concentration part(size transition, indentation, knife scar, wear away crack etc.), the fatigue broke a door to divide two parts while splitting, one part forms for the tired crack development of the tired place broken cross section, present shell-like in shape, the tired source is located on shell top.In order to suddenly split, another part presents the whole rough cross section of gravamen. Make the molding tool taken place the root reason of tired harm for especially the wreath carries a lotus, any can make the surface pulled the factor that enlarges in response to the dint to can accelerate rising of tired crack all. Cold make a molding tool when the work is under the high hard appearance the molding tool steel has very high accept defeat strength and split a tenacity very lowly.Gao of accept defeat strength to be advantageous to the creation that postpones tired crack, but lowly split a tenacity to make expanding of tired crack the velocity speed to let up with critical length and make the circulating number consumedly shortenned, therefore, cold the tired life span making a molding tool be mainly decided by tired crack to rise time. Hot make a molding tool generally at in etc. or lower degree of hardness appearance the bottom undergoes military service, the molding tool splits a tenacity compare cold make a molding tool of Gao De Duo, therefore, makes a molding tool in the heat in, the expanding of tired crack speed is lower than cold make a molding tool, the critical length is bigger than cold make a mold, the heat makes the molding tool tired crack of second critical expand a period colder make a mold to grow much, but hot make the molding tool surface is subjected to nasty cold, the nasty heat rises cold hot tired crack very easily, the heat makes the tired crack of molding tool to rise time compare cold make a mold short get many, therefore, many heats make a mold it is mainly tired to split life span to is decided by time that the tired crack expands. (4)Split expiration. Split an expired familiar form to have:Collapse blade, Gua Chi, split crack, break, the bulge split etc., the different molding tool splits of the driving force is different.Cold make a molding tool, be subjected to of mainly is a machine function dint.(blunt pressure)The heat makes a mold be subjected to in addition to machine dint, there is also heat in response to the dint and the organization and there are higher many works temperatures that the heats make a molding tools in response to the dint, again the adoption compulsorily cool off, its internal help dint can far far above machine in response to the dint, therefore, many heats make a splitting of mold mainly with internal help dint lead greatly relevant. The molding tool splits process to have 2 kinds:1 time splits and tired split.1 time splits for the molding tool sometimes at blunt suddenly split while pressing, crack once rising, after then losing is steady and expands.Its main reason overloads for severity or the molding tool material serious frailty turns.(if leading is hot and returns to fire shortage, seriously gather ten in response to the dint and serious metallurgy blemish etc.) Second, Molding tools lose efficacy reason and prevention measure (1)The structure design absurdity causes expiration. Sharp turn Cape(here in response to dint concentrated is higher than mean stress decuple above) and lead greatly cut noodles variety to result in concentrated in response to the dint, usually become many molding tools in early days expired source.And in the hot processing Cui fire process, sharpen to turn Cape to cause remnants remaining to pull in response to the dint, shorten molding tool life span. Prevent°from measure:Convex mold cohesion transition should even slowly tactful, any knife scars with small service will cause mightiness of should match in response to the dint concentration, its diameter and length-settle a request. (2)Molding tool material the quality is bad causable of expiration. The molding tool material internal blemish, such as loose, shrink bore and mix up a composition to be partial to the Xi and carburet distributes not and all, original surface blemish(if oxidize, take off carbon, fold, scar formation etc.) influence steel material function, A.the admixture Be excessive to cause expiration. Exist the source of the admixture foot creation crack in the molding tool inner part in the steel, particularly brittleness oxide and Huo sour salt etc., process in the hot pressure in don't take place Su to transform, will cause breaking of brittleness but form tiny crack.At later of visit crack to expand further in hot processing and usage, but cause an opening of molding tool crack.The hole that in addition, in the middle of whetting and paring result in surface because of the peeling off big grain admixture. B.the surface take off carbon to cause expiration. Molding tool steel when the hot pressure processes and backs fire, usually because of heat temperature to lead Gao, heat preservation time leads long, but result in steel material surface's taking off carbon, seriously take off a carbolic steel material after the machine processes, sometimes still remain to take off a carbon layer, so in the Cui fire, because of inside outside layer organization of the dissimilarity(the surface takes off the carbon layer as iron cable body, inner part for bead light body) result in organization's changing inconformity, but produce crack. C.the carburet distribute not to divide and cause expiration. Molding tool steels, such as Crl2 and Cr112 MoV...etc.'s containing amount of carbon is as higher as metal alloy chemical element and formed many totally crystal carburets, these carburets were forging comparison hour and easily present to take form and net to be partial to Xi and cause Cui fire's often appearing to follow to take the crack that the form carburet distributes, molding tool the crack expand further, but make the molding tool opened to split in the usage expired. Prevent°from measure:Molding tool when the steel is in the satin Ya should again and again and in many ways to the forging, thus the totally crystal carburet shot in the steel is ground smaller and even, assurance steel carburet asymmetry degree Class request. (3)The machine of molding tool pluses not appropriate. The a slices to pare a medium knife scar:The circle Cape part of the type chamber part or convex mold of molding tool is processing in the machine and usually make the part left a knife scar because of entering knife to explore too much and result in severity in response to dint concentrated, be carry on Cui fire processing, in response to mountain concentration the part very easily produce tiny crack. Prevent°from measure:Together slice to pare in the spare parts thick processed end in, should as far as possible reduce into amount of knife, raise the molding tool surface clean degree. The b electricity processes to cause expiration.Molding tool while carrying on an electricity to process, in order to turning on electricity to produce a great deal of heat, will make the molding tool processed part to heat to go to very heat degree, make organization occurrence variety, form a so-called electricity to process an excrescent layer, at excrescent layer surface because the heat meltdown happens, then very soon solidify, that assumes white in the microscope bottom and there are many very small cracks in the inner part, under the white layer of the district Cui fire happen, call Cui fire layer, again go toward in because the hot influence weakens, the temperature isn't high, the occurrence returns to fire and calls to return to fire layer.Measurese cross section degree of hardness to distribute:Meltdown again concretion layer, the degree of hardness is very high and reach to a 610~740 HRCs, the thickness is 30 μ ms, Cui fire layer the degree of hardness 400~500 HRCs, thick is 20 μ ms.Return to fire to belong to heat to return to fire, organize softer, the degree of hardness is a 380-400 HRCs, thick is 10 μ ms. Prevent°from measure:①The method of using the machine cleans and opens a layer often in of then the concretion layer is a particularly tiny view crack;②Processes juniors to go in the electricity a low temperature returns to fire and makes the excrescent layer stability turned, in order to prevent the tiny crack expands. The c whets to pare to process to result in expiration.When the molding tool type chamber noodles carries on whetting to pare to process, in order to whetting to pare speed to lead greatly, the emery wheel grain spends thin or cool off the condition differ etc. factor influence, all will cause to whet to pare a form song to lead hot or cause surface's softening, the degree of hardness lowers and make the molding tool is in the usage because of wear away severity, or heat in response to dint but the creation whet to pare crack and cause expired in early days. Prevent°from measure:①The adoption slices to pare the dint strong coarse sand round or glues to knot the emery wheel that sex differs;②Reduce a work piece to enter to the quantity;③Choose a suitable coolant;④Adopt 250~350 ℃ to return to fire after whetting to pare to process, with in addition to whet to pare in response to the dint. (4)The molding tool heat processing craft is unsuited to proper. Heat the height, heat preservation of temperature length for time, cool off speed rate of speed etc. the heat processing craft parameter choose not appropriate, will become molding tool expiration factor. A.heat speed:There is more carbon in the molding tool steel and match a life chemical element, transmit heat sex bad, therefore, heating the speed can not too quick, should be slow-moving the occurrence carrying on, prevent°froming a molding tool transform and open crack.While heating Cui fire in the air stove, it is in bar of to oxidize and take off carbon, the adoption packs protection heating, at this time heat speed should not lead quickly, and deeply the heat should be also slower.Thus, can't produce big heat in response to the dint, more safe.If the molding tool heats speed quickly, deeply hot quick, the outside inside the molding tool produces very big heat in response to the dint.If controling isn't appropriate and produce to transform very easily or crack, have to adopt to prepare hot or reduce to slowly heat acceleration to prevent°fro. B.oxidize and take off carbolic influence.Molding tool Cui fire is carry on under the heat degree, such as not and strictly control, the form song oxidizes and takes off carbon very easily.Moreover, molding tool surface after taking off carbon, because of inside the outside layer organization appear bigger organization in response to the dint and cause Cui fire in the difference, cooling crack. Prevent°from measure:Can adopt to pack a protection a processing, fill to defend to oxidize and take off inside the box carbon of fill material. Third, Cool off conditional influence Different molding tool material, according to the organization appearance requested, cool off speed is different.To the high metal alloy steel, because of containing a more metal alloy chemical element, Cui deeply sex is higher, can adopt oil cold, empty cold even etc. the heats such as Wen Cui Huo and grade Cui fire etc. handle craft. Mold Design Plastic Mould Injection Molding 2009-04-21T23:27:36Z molddesign The molding tool chooses a material principle. http://blog.tvdramazone.com/post/27/276 (First) Satisfy a work condition request 1.bear to whet sex The Pi anticipates at molding tool type the Su in chamber changes sex, follow a type chamber surface since the fluxion glides again, made chamber surface and Pi anticipate produce violent friction and cause molding tool's losing efficacy because of wearing away thus.So the material bears to whet sex is one of the most basic and the most important functions in molding tool. The degree of hardness is influence to bear to whet sexual of main factor.Under the general circumstance, the degree of hardness of molding tool spare parts is more high and wear away quantity more small, bear to whet sex also more good.Bear to whet sex to return moreover and the category, amount, appearance and size of carburet in the material and distribute relevant. 2.strong tenacity The work condition of molding tool is mostly very bad and have some to often bear bigger impact burden and cause brittleness' splitting thus.In bar of molding tool spare parts while working suddenly the frailty break, the molding tool has to have a high strength and tenacity. The tenacity of molding tool is mainly decided by the containing of material amount of carbon and crystal grain degree and organization appearance. 3.tired split function The molding tool works process in, at circulation in response to usually cause fatigue's splitting under the long-term function of dint.Its form has small energy to pound at fatigue to split, pull to stretch fatigue to split contact fatigue to split for many times and bent tired split. Molding tool of tired split function to mainly be decided by its content of admixture in the strength, tenacity, degree of hardness, and material. 4.heat function When the work temperature of molding tool is higher to enter, will make degree of hardness and strength descended and made the molding tool worn away or produced Su to transform but lost efficacy in early days.Therefore, the molding tool material should have the higher anti- returns to fire stability to promise molding tool at work temperature under, have high degree of hardness and strength. 5.Bear cold hot tired function Some molding tools are in the process of working in be again and again placed in the appearance of heating and cooling, the made chamber surface is pulled, the pressure become in response to the function of dint and cause surface cracked and peeling off, enlarge friction, obstruct Su to transform, lowered size accuracy, cause molding tool expired thus.One of the main forms of expiration that the cold hot fatigue is hot to make a molding tool, helping this molding tool should have to higherly bear cold hot tired function. 6.bear eclipse Some molding tools,such as plastics mold, after aring subjected to while working, because of existing chemical elements, such as chlorine and fluorine...etc. in the plastics the heat divide to analyze a HCI, and HF...etc. strong erosion air, erode molding tool type chamber surface, enlarge its roughness, turn worse to wear away expiration. (Second) Satisfy craft function request The manufacturing of molding tool all generally wants has been forge, sliced to pare to process, hot processing etc. is a few work prefaces.In order to promise the manufacturing quality of molding tool, lower production cost, its material should has goodly can Duan, slice to pare to process sex, Cui rigidity and Cui deeply sex and can whet to pare sex;Should also have to smallly oxidize, take off carbon sensitivity and Cui fire to transform to open crack tendency. 1.can Duan Have lower hot Duan to transform resistance, Su good, forge temperature scope breadth, the Duan splits the net carburet of cold crack and Xi to incline to low. 2.back the fire craft The ball turns to back the fire temperature scope breadth and back fire degree of hardness low and motion the scope is small, the ball turns a rate Gao. 3.slice to pare to process sex Slicing to pare dosage is big, the knife exhausts low, process a roughness low. 4.oxidize, take off carbon sensitivity The anti- oxidized a bosom to be good when heat heated and took off carbon speed slow, lie quality to the heating the sensitive produced hemp point to incline to not small. 5.Cui rigidity The Cui fire has behind even but Gao of surface degree of hardness. 6.Cui deeply sex Can acquire the deeper Cui hard layer after the Cui fire, the adoption mollifies of the Cui fire lie quality ability the Cui is hard. 7.the Cui fire transform to open crack tendency The normal regulations Cui fire physical volume changes small, the shape raises a song, mutation slight, unusually transform to incline to low.The normal regulations Cui fire opens crack sensitivity low, to Cui fire temperature and work piece shape not sensitive. 8.can whet to pare sex The emery wheel is opposite to exhaust small, have no burn extreme limit to whet to pare dosage greatly, to the emery wheel quality and the cooling condition not sensitive, not easily occurrence whet harm and whet to pare crack. (Third) Satisfy economic sex request At choose a material for molding tool BE, have to consider economy, this principle, lower a manufacturing cost possibly.Therefore, choosing price first is lower while satisfying the premise of using the function, can use a carbon steel for need not metal alloy steel, can use domestic material need not importing material. Should also consider the production and supply circumstance of market while choosing a material moreover, the steel chosen's growing should be as far as possible little and concentrated and easily purchase. Mold Design Plastic Mould Injection Molding 2009-04-21T23:25:34Z molddesign The molding tool flows the basic principle of a design http://blog.tvdramazone.com/post/27/275 Basic principle Common of flow a system(Runner System) also calls to sprinkles a system or sprinkle to note system, is a meltdown plastics from project machine and shoot a mouth(Nozzle) to mold cave necessarily through the letter way.Flow a system includes an essential way(Primary Runner), reposition of redundant personnel way(Sub-Runner) and sprinkles.Descended diagram to show flowing of typical model a system constitutes. Essential way:Also call a lord to sprinkle a way and note way(Sprue) or Shu to sprinkle a way, mean to start counting from the part projecting machine to shoot a mouth and molding tool essential way Chen set contact, go to a reposition of redundant personnel way of flow a way.This part is the part that the meltdown plastics first flows through after getting into a molding tool. Reposition of redundant personnel way:Also call a cent to sprinkle way or time to sprinkle a way, can classified into again with the molding tool design the penny flows way(First Runner) and the second.The reposition of redundant personnel way is an essential way and sprinkles transition between a peoples district, can make the flying to of meltdown plastics acquired even slowly conversion;Has the function that the even allotment plastics arrives each mold cave to the many mold caves molding tool in the meantime. Sprinkle:Also be called into anticipate.BE the narrow and small of the reposition of redundant personnel way and mold cave is also a thin the shortest and small meat part.The function lies in exploitation to tighten to flow noodles but makes the plastics attained accelerative effect, Gao Jian slices a rate to make plastics mobility and good;(because the slicing of plastics changes to sparse characteristic)Glue heating of Zhi heating effect to also have the function to promote to anticipate to lower to glue a degree.Sprinkle after modeling and completing first solid turn a , have already prevent°fromed plastics of reflux and avoid mold cave the pressure once descended to make to model an article creation the constringency hollow function quickly.The convenience then cuts off to flow a system and Su piece by separation after modeling. Cold anticipate well:Also call cold anticipate cave.The purpose lies in a storage to repair to gather the fill beginning starts the stage cooler plastics before the wave and prevent°from cold the cave anticipating to directly get into a mold influence fill quality or block to sprinkle, cold anticipate well usually constitution at essential way bitter end, be reposition of redundant personnel way when the length is longer should also set up in the bitter end cold anticipate well. Design a basic principle The consideration of mold cave decoration(Cavity Layout) as far as possible adopts an equilibrium type decoration(Balances Layout).Mold cave decoration with sprinkle to set up to try hard for symmetry, in order to prevent the molding tool be subjected to dint to not and all produce to be partial to carry but take place to support a mold to overflow the problem for anticipating.Such as figure 2 designs with symmetry is better, cave decoration possibly tightly packed with narrow molding tool size.Considers for the molding tool size such as figure 3(b) designs but the speech surpass figure 3(b) designs.The consideration that the fluxion leads to lead can guide meltdown plastics to fill with mold cave successfully, don't produce Wo to flow, and ability the smooth row annoy. As far as possible keeps the plastics Rong gum front side from pounding at a smaller type of diameter Xin and metal Qian piece, in order to prevent type the Xin moves(Core Shift) or transforms. The calories is lost and the pressure decline of consideration The calories exhausts and the pressure decline more small more good. The process has to be short. Flow a piece area to have to be enough big. As far as possible avoid flowing a way curved fold and suddenly change to fly to.(change a direction by arc Cape) The roughness has to be low while flowing a way to process.Much ordering can lower pressure to decline into sprinkling and need to shoot to press, but will have a seam problem.Flowing is equilibrium of consideration, One mold when many caves(Multi-Cavity) fill flow a way to have to be equilibrium, as far as possible make the plastics filled with each mold cave in the meantime to promise that each mold cave models the quality consistency of article.The reposition of redundant personnel says with detail the decoration method(Naturally-Balanced Layout) of the quantity adoption natural equilibrium type. Can not natural balance adoption the artificial equilibrium method balance flow a way. The consideration of waste Let up to flow a physical volume(length or piece area size) to flow a waste creation and recall expenses by decrease under the premise that can fill smoothly don't influence in the meantime fluxion and pressure exhaust. Cold anticipate of consideration Design in flowing a system adequacy of cold the beginning anticipating well(Cold Slug Well) and overflowing to anticipate slot to gather by repairing a fill start the stage cooler plastics before the wave and prevent°from cold anticipate to directly get into mold cave to influence fill quality.The consideration that lines up spirit should lead to lead plastics to fill with mold cave smoothly, and can make the mold air inside the cave escaped smoothly to avoid the problem that the envelopment is burned.The consideration that takes shape article quality avoids taking place short shoot, hair side, envelopment, seam, flow a scar, spray to flow, remnants remaining in response to the dint, raise a song to transform, the mold Ren be partial to move etc. problem. Flowing a system process is longer or much orders into sprinkle(Multiple Gating), should take into to prevent°fro because of flowing unbalance and protecting to press the finished product that shortage or asymmetry constringency causes to raise a song to transform a problem. The product external appearance contains good property and cleans and fixs the whole external appearance and application that sprinkle a people's convenience, sprinkle a people's scar(Gate Mark) to have no Sun at the Su piece.The consideration that produces an efficiency to the utmost can reduce need of process behind, make to take shape a period to shorten, raise a production efficiency.The consideration that the crest orders needs the crest position of considering the adequacy to take shape by avoiding a pint mold to transform.The consideration that uses plastics glues one degree higher or L|the t compare shorter plastics to avoid once using to grow or lead flowing of baby size way. Mold Design Plastic Mould Injection Molding 2009-04-21T23:21:54Z molddesign The molding tool surface handles a technique http://blog.tvdramazone.com/post/27/274 The molding tool heat processing is the important craft process that promises molding tool function.It has the direct influence on the following function of molding tool. The manufacturing accuracy of the molding tool:The organization changes asymmetry, ill success and heat processing formation of cripple remaining in response to dint lead greatly result in the molding tool is after the heat handles of process, assemble and molding tool use process in of transform, lower the accuracy of molding tool thus, even discard. The strength of the molding tool:The hot processing craft draws up a not appropriate and hot processing operation norm not or hot processing the equipments appearance isn't intact and result in is handled molding tool strength(degree of hardness) could not reach a design to request. The work life span of the molding tool:The organization structure that the hot processing results in not reasonable and crystal grain degree super mark etc., make the main function,such as the tenacity, cold hot tired function and anti- of molding tool, worn away function etc. to descend, influence the work life span of molding tool. The manufacturing cost of molding tool:As the middle link or end work preface that the molding tool makes process, the hot processing results in of open crack and transform super bad and the function is super bad, will make the molding tool discarded under majority of circumstances, even if pass a repair still can continue to use, also will increase man-hour, the extension delivers goods a period and raises the manufacturing cost of molding tool. Is exactly hot processing technique and molding tool quality to contain very close connection, make these two kinds of techniques are in the modern progress and promote mutually, common exaltation.Since 80's in 20th century, international molding tool heat processing technique's developing quicker realm is the surface that the vacuum heat handles a technique, molding tool to enhance a preparing of technique and molding tool material hardening technique. The vacuum heat of molding tool handles a technique Vacuum heat's handling a technique is a kind of new hot processing technique that the nearer year development gets up, it the characteristics had is exactly a molding tool manufacturing in the urgent demand of, for example keep heating from oxidizing and don't take off the carbon, vacuum takes off spirit or in addition to annoying, cancellation hydrogen frailty, raise the Su of material(spare parts) and tenacity and fatigue strength thus.The vacuum heats slow-moving, inside the spare parts outside difference in temperature smaller etc. factor, come to a decision the spare parts that the vacuum heat processing craft results in to transform small etc.. Press adoptive of the cooling lie quality different, the vacuum Cui fire can is divided into the vacuum oil cold Cui fire, vacuum to annoy cold Cui fire, vacuum water Wen Cui Huos, such as cold Cui fire and vacuum nitric salt...etc..In the molding tool vacuum hot processing main application of is the vacuum oil cold Cui fire, vacuum to annoy cold Cui fire and vacuum to return to fire.In order to keep the good characteristic of work piece(like molding tool) vacuum heating, choosing of coolant and cooling craft and draw up count for much, the molding tool Cui fire process mainly adopts oil cold compatibly cold. No longer carry on the molding tool work that the machine processes noodles behind to the hot processing, the Cui fire adopts vacuum to return to fire possibly behind, especially vacuum Cui fire of work piece(molding tool), it can raise and the surface quality related machine function, like tired function, the surface shining degree, but causticity...etc.. The calculator of the hot processing process imitates the successful development and application of technique(include organization emulation and function to predict a technique) and makes the intelligence of molding tool turned a hot processing to make possible.Because of small batch quantity(even single piece), many characteristics of specieses that the molding tool produces, and request Gao to the hot processing function and disallow to appear the characteristics of discarding the article, and then make the intelligence of molding tool turned a hot processing to become have to.The intelligence of molding tool turns a hot processing to include:The structure of the explicit molding tool, request a molding tool to heat process temperature with the material, hot processing function field, in response to dint field distribute of the calculator imitate the molding tool cooling process temperature field, mutually change process and distribute in response to the dint field of calculator imitate the imitating of heating and cooling craft process true Cui fire craft of establishment heat processing equipments of automation control technique.Abroad the industry is flourishing nation, like the United States, Japanese etc., annoy Cui in the vacuum high pressure, have already developed the technique development of this aspect, mainly aim at a target is also a molding tool. The surface of molding tool handles a technique The molding tool is in the work in addition to requesting the radicle the reasonable match of strength and tenacity that the body has enough Gao, its surface function goes to a pass to work function and service life of molding tool importance.These surface functions point:Bear to wear away function and bear to decay function, coefficient of friction, tired function etc..The improvement of these functions, improvement and exaltation of pure dependence radicle body material are very limited, also uneconomical, and pass a surface processing technique, usually can receive the effect of half effort and double results, this is exactly also the surface processing technique to get the reason of quick development. The surface of the molding tool handles a technique and changes a sex or compound processing technique through a surface Tu Fu, surface, change molding tool surface of appearance, chemistry composition, organization structure and in response to dint appearance with acquire the system engineering of needing the surface function.The way handled from the surface up, can is divided into again:Chemistry method, physical method, physical chemistry method and machine method.Although aim's being morely applied in the middle of raising a molding tool surface function new processing technique to continuously flow out now,make in the molding tool mainly is to ooze nitrogen and ooze carbon and hardening film deposition. Ooze nitrogen craft has air to ooze the nitrogen, ion oozes nitrogen, liquid to ooze nitrogen etc. the method , in each method that ooze nitrogen, all how many grow to ooze nitrogen technique, can adapt to the request that the different steel grows a different work piece.In order to oozing the surface that nitrogen technique can form good function, and oozing, the Cui fire craft of nitrogen craft and molding tool steel contains good coordination and ooze nitrogen temperature in the meantime low, don't need vehemence cooling after oozing nitrogen, transforming of molding tool smallest, therefore the surface of molding tool enhances is an adoption to ooze nitrogen technique a little bit early, is also apply the most extensive. The molding tool oozes a carbolic purpose, mainly for raising the whole and durable of molding tool, namely the work surface of molding tool has high strength and bears to whet sex, from here lead go into of technique way of thinking BE, use lower of material, then pass to ooze carbon Cui fire to replace the material of higher Class, lower a manufacturing cost thus. Harden currently a film deposition technique Be more mature to is CVD and PVD.For the sake of the combining of increment film layer work piece surface strength, developed various CVDs and PVD now technique.Harden a film deposition technique at the earliest stage on the tool(the knife had, the blade had, the quantity had etc.) application, the effect was the best, various knifes having has already hardenned Tu Fu the film was a standard craft.The molding tool starts adopting Tu Fu to harden a film technique from 80's in last century.Hardenning the cost of film deposition technique(mainly equipments) is higher under the current technique condition, still at some nicety, longevity life molding tool up apply, if the adoption builds up the way of hot processing center, Tu Fu's hardenning the cost of film will consumedly lower, if more molding tools adopt this technique, can make level by the molding tool of the whole exaltation our country then. The molding tool material prepares a hardening technique The molding tool is in the process of making in carry on a kind of craft that the hot processing is a great majority molding tool to follow to use for a long time, starts from 70's in last century, international up put forward the viewpoint of preparing the hardening, but in order to processing tool machine just degree and sliced to pare the check and supervision that the knife have, preparing the degree of hardness of hardening could not attain the usage degree of hardness of molding tool, so prepare to harden a technical development to contain not great devotion.Along with process tool machine and slice to pare the exaltation that the knife has function, the preparing of molding tool material hardening technique development speed speeds, till 80's in last century, international the mold going to an industrial flourishing nation at the plastics is used on usage of material prepares the comparison of hardenning the mold piece to already arrive 30%.(currently in above 60%)Our country in the 90's in last century in after expect to start adopting to prepare to harden a mold piece.(mainly use a foreign import product) The molding tool material prepares a hardening technique mainly at the molding tool material production factory development in the house and the implementation.The hot processing equipments that chemistry composition and equipment correspond that passes to adjust a steel, can large numbers of quantity produce a preparing of quality stability to harden a mold piece.The our country prepares a hardening technique in the molding tool material, start night, the scale is small, can not also satisfy the request that the local molding tool makes so far. The adoption prepares to harden molding tool material, can simplify a molding tool manufacturing craft and shorten the manufacturing period of molding tool and raise the manufacturing accuracy of molding tool.Can foresee, along with the progress of processing technology, preparing to harden molding tool material will be used for more molding tool types.The molding tool heat processing is the important craft process that promises molding tool function.It has the direct influence on the following function of molding tool. The manufacturing accuracy of the molding tool:The organization changes asymmetry, ill success and heat processing formation of cripple remaining in response to dint lead greatly result in the molding tool is after the heat handles of process, assemble and molding tool use process in of transform, lower the accuracy of molding tool thus, even discard. The strength of the molding tool:The hot processing craft draws up a not appropriate and hot processing operation norm not or hot processing the equipments appearance isn't intact and result in is handled molding tool strength(degree of hardness) could not reach a design to request. The work life span of the molding tool:The organization structure that the hot processing results in not reasonable and crystal grain degree super mark etc., make the main function,such as the tenacity, cold hot tired function and anti- of molding tool, worn away function etc. to descend, influence the work life span of molding tool. The manufacturing cost of molding tool:As the middle link or end work preface that the molding tool makes process, the hot processing results in of open crack and transform super bad and the function is super bad, will make the molding tool discarded under majority of circumstances, even if pass a repair still can continue to use, also will increase man-hour, the extension delivers goods a period and raises the manufacturing cost of molding tool. Is exactly hot processing technique and molding tool quality to contain very close connection, make these two kinds of techniques are in the modern progress and promote mutually, common exaltation.Since 80's in 20th century, international molding tool heat processing technique's developing quicker realm is the surface that the vacuum heat handles a technique, molding tool to enhance a preparing of technique and molding tool material hardening technique. Mold Design Plastic Mould Injection Molding 2009-04-21T23:18:45Z molddesign CAE technique the plastic molding tool design to develop inevitable trend http://blog.tvdramazone.com/post/27/273 The molding tool is the important craft that produces various industrial product material, along with plastics industry of quick develop and plastic product the expansion in the aviation, aerospace, electronics, machine, ships and the car etc. industrial section apply, the request of product to molding tool is more and more high, and the traditional molding tool design method has already canned not adapt to the request that the product renewal changes generation and exaltation quality.The computer-aided engineering(CAE) technique has become plastic product development, molding tool design and product to process to win these weak links of go by way of most effectively.The together traditional molding tool design compares, the CAE technique is raising rate of production and promises product quality, still in the aspects of declining low cost, easing labor strength waiting, all have superiority very. The American listed company Moldflow company is profession to is engaged in to note Su to model CAE software and consultation company, have been predominating a plastics to model CAE the software market is since 1976 published the first fluxion to analyze software in the world.The last few years got an extensive application at realms such as car, appliance, electronics communication, chemical engineering and daily necessity etc.. The technique of making use of CAE can before the molding tool process, on the computer to whole note Su to model process to carry on a type of ratio analysis, the accurate estimate Rong fill, protecting of body presses, cooling circumstance, and product in of distribute in response to the dint, member and fiber mindset distribute, the constringency of product and raise a song to transform an etc. circumstance, for the purpose of design can as early as possible discover a problem, in time modification system piece and molding tool design, not wait until to try a mold to return again to fix a molding tool by Hou.This not only is to a breakthrough of traditional molding tool design method, and even keep molding tool from returning to fix to discard, raise product quality and decline low cost etc. to the decrease, all have a great technique economic meaning. The design of plastic molding tool not only wants to adopt CAD a technique, but also still needs to adopt CAE technique.This is the inevitable trend of development.Note Su to model to divide two stages, then development|design stage(include product design, molding tool design and molding tool manufacturing) and production stage.(include to purchase material and try a mold and model)Noting of tradition Su method is before formally producing, because of designing the personnel design a molding tool with experience and the intuition, the molding tool assemble completes Hou and usually needs to several times try a mold and discovers problem Hou, not only need to re- establish craft parameter, even still need to modify plastic product and molding tool to design, this certanly will increase production cost and prolong product development period.Adopt a CAE technique, can completely replace to try a mold, the CAE technique provided the complete solution of designing to°from the product the production, before the molding tool makes, predict plastic Rong body at type chamber in of whole models process, help to grind to judge a latent problem, availably prevent°from problem occurrence, consumedly shortenned a development period, lowered production cost. In recent years, the CAE technique is noting Su to model the importance in the realm to enlarge day by day, adopting the CAE technique can solve to note Su to model to appear in the process completely of problem. Mold Design Plastic Mould Injection Molding 2009-04-21T23:05:24Z molddesign