Shanghai Daoqin Plastics Co., Ltd.

国家 grade expert 黄步明模 sheet/plate is injection molding parts machine most important parts 之一, it cost is injection molding parts machine cost main/primary formed separation, sheet/plate fracture injection molding parts machine can positive as. from strong/high degree 出发, is selection good material, but also amount will sheet/plate thick degree thick 一, this 两点均 improve/increase sheet/plate 造价, effect/influence machine cost, manufacturing from property can, price comprehensive 考虑, in sheet/plate large separation using/adopting 球墨铸 iron 铸造. this main/primary 考虑: （1）球 iron cost low, in sheet/plate upper add strong/high or will sheet/plate 掏空, can has decrease/reduce weight; （2） due to decrease/reduce processing and iron 本身容 easy processing, can has decrease/reduce processing cost; （3）球 iron rigid property relatively good, tool has hardness. tube/pipe design already separation 考虑 模 sheet/plate rigid property, strong/high degree, still has many sheet/plate fracture 事故发生, this is what causes 呢? currently upper large more injection molding parts machine using/adopting 肘杆式（ machine 铰式） clamping plant/unit, Imported injection molding parts machine using/adopting liquid 式（ full liquid pressure 式） clamping plant/unit, 广东泓利 machine has company （原顺德市秦川恒利塑 machine has company ） using/adopting 四缸直锁二 sheet/plate clamping plant/unit. lower for this types clamping plant/unit sheet/plate fracture causes add analysis. 图2.动模 sheet/plate 一, 肘杆式 clamping plant/unit （一）模 sheet/plate force analysis for/regarding front sheet/plate （如图1） 说, its force good use 手帕包东西一样, need attention/notes is, in 间挖空 if large, or in for 称线附近 has defect, 螺钉孔, and other defect, has fracture 危险. for/regarding sheet/plate, in F3 and F4 function lower, sheet/plate deformation 如图2, due to force long, water 平轴线发生 fracture most large. for/regarding rear sheet/plate, its force and front sheet/plate versus 近, is from design degree 出发, is increase mold opening 行程, necessary decrease/reduce 图3 in A dimensions, this is rear sheet/plate fracture main/primary causes. （二） system force analysis 1． in 肘杆伸直时, 四根拉杆（哥林柱）必然受拉, due to processing and assembly causes, 四根拉杆受 force long degree same, this 样受拉 force different, function in sheet/plate upper force different, this easy 引起模 sheet/plate local ultra- 载而 fracture. 2．同样 due to processing, causes, 如两边 front rear 肘杆不 and other long, 四根拉杆不 and other long, sheet/plate thick thin 不均, injection molding parts mold 安装面不平行 and other make 肘杆伸直 rear force different. injection molding parts mold rigid rigid combined, if upper lower 肘杆形 formed 初始角 different （如 lower 图）, 即a1=a2, 必然会 make 肘杆受 force 不均, heavy can 达30％ above, that injection molding parts mold force 也不均, this will make injection molding parts mold and sheet/plate 接触面积 decrease/reduce, bending force increase, this 必然导致模 sheet/plate force 不均而 fracture. （三）肘杆 排列 and injection molding parts mold 安装1．肘杆 main/primary separation is upper lower or water 平排列两 types, if 不考虑 lubricated factors, 考虑装模方便, generally is H1≥H2, using/adopting water 平排列时 rear long degree can long, increase sheet/plate 行程, this 样, if using/adopting long strip/profile type injection molding parts mold, injection molding parts mold wide degree B ratio L1 small more, 则动模 sheet/plate comparison easy fracture. 当然, using/adopting upper lower 排列则 injection molding parts mold water 平轴线附近容 easy flash, but also mold opening relatively small. 2． injection molding parts mold 安装面积太 small, make sheet/plate bending force large increase, sheet/plate easy fracture. （四） use process 1．调模不当 or 安装不当, make 4 strip/profile 拉杆（哥林柱）受 force or clamping force ultra- 载均会造 formed sheet/plate fracture. 2． for/regarding processing 一 投影面积 large, viscosity low product, use PP做录像 belt/tape box/case and VCD box/case and other, if injection molding parts mold quality relatively or force 不均, products very easy flash, flash rear, 一方面胀模 force increase, make 肘杆, 拉杆, 哥林柱 and other negative increase, 另一方面, can can in 点, in mold opening 时, in to in 点时就 versus to injection molding parts mold and other 一 附 add clamping force, in rear, system elastic property, deformation force and mold opening force add make system generate impact, this type of impact force is formed sheet/plate fracture main/primary causes. especially is sheet/plate using/adopting iron 铸造时, use time long, parts easy generate fatigue, has defect 时, especially easy fracture. therefore, is decrease/reduce mold opening difficult, decrease/reduce impact, 常 肘杆 design formed 斜排列（ belt/tape has r角）如图6（1） or 角排列（ belt/tape has w角）如图6（2）, this 两者均 decrease/reduce force large 倍数, method 自锁, in process in must toward clamping 油缸补充 high pressure 油, increase can consumption. 二, （ full liquid pressure ）充 liquid clamping plant/unit liquid clamping plant/unit rear sheet/plate force and 肘杆式 front sheet/plate force same, rear sheet/plate generally and 锁模油缸铸造 formed 一体, its main/primary issues is 油缸本身 abrasion loss and issues. sheet/plate force ratio 肘杆式 动模 sheet/plate good more, generally relatively thin, relatively less fracture. 三, 四缸直锁二 sheet/plate clamping plant/unit sheet/plate due to clamping force function in front sheet/plate and sheet/plate between, its force and 肘杆式 front sheet/plate same, again add 以评述. from above analysis in can 看出, 肘杆式 clamping plant/unit sheet/plate comparison easy fracture, this and its structure has 关, is it is system rigid property deformation generate clamping force, but also, this type of fracture has also and use and other its it factors has 关, use need especially attention/notes. full liquid pressure clamping plant/unit generally 不出现 ultra- 载 phenomenon. 广东泓利 machine has company （原顺德市秦川恒利塑 machine has company ） production full liquid pressure 四缸直锁二 sheet/plate series injection molding parts machine remove ultra- 载 outer, due to using/adopting 四缸直锁锁模 structure （如图7）, 拉杆（哥林柱）承受 mono clamping force, this function in sheet/plate 四 角. 四 油缸 油路 is 连通, 故锁模时, sheet/plate 四 角 upper force 均衡. machine design comparison especially, it can make clamping force injection 结束而 separation grade large decrease/reduce, can decrease/reduce system （包括模 sheet/plate, injection molding parts mold ）承受 high negative time 60％ or above, sheet/plate easy fatigue. but also, injection molding parts processing sheet/plate using/adopting 45号钢 sheet/plate manufacturing, from 而不存 in defect fatigue bad issues. this is injection molding parts processing for structure 三包五 year other injection molding parts processing method main/primary causes. 总之, sheet/plate fracture is very heavy 事故, injection molding parts processing in and use injection molding parts machine need especially 留意. 广东泓利 machine has company