Shanghai Daoqin Plastics Co., Ltd.

as is types new precision injection molding parts technology, micro foaming injection molding parts molding process breakthrough injection molding parts more 局限, can significantly decrease light made parts weight, shrink short molding cycle, large improvement made parts warpage deformation and dimensional stability. especially in production high quality requirements precision products upper, process more is tool advantages, already formed is processing production light precision parts 时 一 important selection. Raw Materials price 不断飙 rise, for manufacturing versus for low 廉 亚洲 market belt/tape large impact, very more processing already 经开始意识 to, make in China again is products 产. is 另一方面, is has market machine, Vietnam, Indonesia and other 一 国家 supply also 不 不 through decrease price methods 适应消费者 demand. however, product 越 越 complex, made parts requirements and surface appearance quality requirements 也越 越 high, using/adopting injection molding parts processing technology production this made parts, 往往会出现 multiple quality issues, products in relatively large internal stress, due to shrinkage 不均而导致 product deformation and other, to requirements quality or cost requirements. can 说, plastics processing to front has 挑战, 他们迫切 need new processing technology 改变现 in 困境. in recent years, types new technology —— precision injection molding parts molding technology 越 越受 to 人们 关注. this type of technology can will made parts production dimensions degree control in 0.01～0.001mm between, has 时甚至 can to 0.001mm below/following. and injection molding parts process versus ratio, technology production made parts tool has good force property can and dimensional stability, but also made parts dimensions degree and heavy degree high, scope/range small. due to its multiple property can advantages, add upper plastics processing field/area “突变”, is technology provide vast development 空间. currently, in for products specifications requirements very high medical and electronics electrical appliances field/area, precision injection molding parts molding already development formed is types non formed and injection molding parts process. in recent years, automotive market 异军突起, machine in 寻找油 consumption more small automotive meanwhile, more need high degree automotive parts and trim parts, this precision parts production 同样离不开 precision injection molding parts molding process. in this field/area in, Trexel company MuCell micro foaming molding process performance is 突出, is precision molding technology in development most fast, application most molding technology 之一. molding process main/primary gas 孔 膨胀 filling products, in relatively low 且平均 pressure lower formed made parts molding. micro foaming molding can separation formed stage/phase （如图1 示）: 首先, will ultra- 临界流体(CO2 or N2) solvent understanding to hot melt in formed mono versus solvent 体, in 一定 恒定 pressure lower maintain lower; rear, through 开关式射嘴 will mono versus solvent 体射入 temperature degree and pressure relatively low injection molding parts mold type in, formed micro foaming product. due to temperature degree and pressure reduce separation unstable property, from in products in formed a large amount of bubbles 核, this bubbles 核逐渐 long large formed micro small 孔洞. foaming rear products 横切面放 large 图如图2 示, can to made parts table/sheet also is foaming 实体层, this is due to injection molding parts mold temperature degree relatively low, surface resin cooling speed, fine 胞核没 has formed long time 而导致. injection molding parts process need using/adopting relatively high inner pressure formed injection molding parts, is, relatively high pressure 点往往会 make made parts due to relatively large 且不平均 pressure 而发生破裂. versus ratio lower, MuCell micro foaming molding process need machine holding pressure, can achieve melt filling, therefore large large decrease/reduce product internal stress, ensure product different 位置 平均 shrinkage, has improve/increase product dimensional stability, also significantly decrease light products weight, remove flash. another, process injection molding parts mold need 进行反复精调, need in positive 常 情况 lower, can ensure injection molding parts molding quality. Trexel company president/CEO Dave Bernstein introduction 说, MuCell micro foaming molding process add fast and cooling speed degree, meanwhile holding pressure process, has improvement made parts molding cycle. meanwhile, process also make injection molding parts production 朝 自动化 direction development, more has improve/increase production efficiency. control dimensions “ if 你 工 injection molding parts processing 继续留 in Europe or 北美, that 么就必 must amount shrink decrease cost, ”Dave Bernstein说, “ but also need achieve 自动化 production, processing must control made parts 公差. ”而MuCell micro foaming molding process can will made parts control in requirements scope/range inner, ensure made parts dimensional stability. for/regarding injection molding parts mold development front stage/phase, this also can decrease/reduce injection molding parts mold design 反复修改, production cost. production high 32.43cm, wide 87.33cm and long 191.50cm injection molding parts mold is 例（, separation using/adopting injection molding parts process and MuCell micro foaming molding process production injection molding parts mold, 并由此 obtain 一组实心 made parts and micro foaming molding parts. in long, wide, high direction upper for made parts 进行测 amount, through comparison 发现, MuCell made parts in direction upper tool has more small dimensions 偏差, but also tool has relatively strong/high control dimensions process can force. most 近, Japan using/adopting MuCell process production 出 一 types small type printing machine 支架. this is types weight non light parts, can in printing machine surface 回移动, therefore, for made parts weight and requirements non high. Bernstein table/sheet 示, using/adopting process production rear, “该部 parts cost, density, weight and molding cycle to 改进. ”据 introduction, parts 公差仅 is 30μm. improvement warpage deformation warpage deformation is injection molding parts production in Common relatively difficult solution products defect 之一, it main/primary is products due to force and shrinkage non-uniform generate. due to in MuCell micro foaming molding process in, made parts 始终处于平均 pressure lower, ensure different uniform shrinkage, make this issues solution. 以导纸 sheet/plate is 例（如图5 示）, using/adopting injection molding parts process made parts warpage deformation degree is 0.807mm, using/adopting MuCell foaming molding process to made parts its warpage deformation degree is 0.429mm, ratio front improve/increase 47%. 另一 典 type application is, using/adopting process production automotive upper control connectors outer housing/shell （如图7 示）. parts using/adopting is 30% glass fiber reinforcement PBT材 material, material in reinforcement rear due to direction upper shrinkage rate 不一致, therefore, using/adopting injection molding parts process production 时, non easy warpage deformation. from 图8 in can to, made parts deformation degree is 1.1cm, using/adopting MuCell micro foaming molding to parts warpage deformation has significantly improvement, its warpage deformation degree is 0.27cm, relatively front reduce 约75%. 8 using/adopting types injection molding parts process to automotive parts warpage deformation decrease light weight MuCell process in decrease light weight advantages is easy 见. selection PBT, filling nylon and ABS and other different resin material production made parts, process can in ensure made parts structure strong/high degree 不发生 very large front lower, will its weight decrease/reduce 10% above. through table/sheet 2 can 看出, different material made micro foaming molding parts weight ratio same material made made parts low. and structure foaming different, MuCell micro structure more add 规整, meanwhile micro distribution more add uniform. “ for/regarding small type thin products, MuCell micro foaming molding process injection speed degree non fast, but also 晶核都 is 瞬间形 formed, ”Bernstein说, “ therefore, this micro 孔并不会出现 processing 商 不愿看 to micro melt combined phenomenon. ” value is, polycarbonate (PC) material although can to very good micro foaming, is 由该材 material made made parts 会出现 impact resistant strong/high degree decline 情况, currently also suitable for process. remove outer, MuCell micro foaming molding process can suitable for currently has thermoplastic property material. 据Bernstein introduction, Trexel company already for multiple material experiment/testing. Bernstein table/sheet 示: “我们 meanwhile also in development and experiment/testing more more can used for technology new material, high temperature nylon, polysulfone (PSU) and thermoplastic polyurethane (TPU) and other, but also obtain 结果也令我们 non 常兴奋. ” 源: plastics