Shanghai Daoqin Plastics Co., Ltd.

injection molding is will melt plastics, in high pressure lower nozzle temperature degree relatively low combined mold inner molding. thermoplastic property plastics and hot solid property plastics can use injection molding, it in packaging container made as upper main/primary can made as various packaging container, various turnover box, small box/case and other. for/regarding packaging container, in structure design main/primary 应考虑 below/following 几方面.

1. container thick

for thick design main/primary 考虑三方面: is thick degree; is uniform property; is 平缓 渡.

①  thick degree: container thick main/primary its applications, plastics types type, structure and other 决定. for/regarding thermoplastic property plastics, generally small 于0. 6mm, 常选取2~4mm; for/regarding hot solid property plastics, its flow property relatively 差, thick degree need large, small parts is 1. 6~2. 5ram, large parts is 3. 2～8mm, most large ultra- 10mm.

②  uniform property: thick uniform property for container quality effect/influence very large, types container thick degree large, make shrinkage non-uniform, formed deformation, cracks and other defect. therefore, in structure design 时应尽 amount using/adopting and other thick structure.

③ 平缓 渡: in certain container in, has due to structure need must thick degree meanwhile, container 转折处, this using/adopting 平缓 渡避免截面突变.

2. improve/increase rigid degree    

plastics comparison flexibility, made formed container rigid degree relatively 差, turnover box type container has 时承载 amount also relatively large, in structure upper 应采取 various improve/increase rigid degree measures.

①  increase add strong/high 筋: add strong/high can reinforcement container strong/high degree and rigid degree. for add strong/high basic requirements is: more, thick thin, high degree 宜矮, has 足够 斜 degree, 筋 底部宜呈圆弧 渡, make add strong/high direction and material direction 一致以 improve/increase plastics tough property;

②  improvement 形状: container more is thin parts, easy deformation, 应采取 various reinforcement measures, will container 四侧壁稍 toward outer 凸, improve/increase rigid degree; is in is anti 止扭曲而进行 belt/tape reinforcement; in container is anti 止口部 deformation 而进行 边缘 reinforcement; in container design formed 波纹状, 拱形状而进行 底部 reinforcement.

③  combined 理支承: container 底面积 relatively large, will 整 底面 as is 支承并不 combined 理, 因底部稍 is 拱曲则放不平, will 面支承变 is 线支承 or 点支承, 凸边支承(即线支承);凸起 底脚支承(即点支承); high degree generally is 0. 3~0. 5mm.

④ 转角: 转角系两 面 or 三 面 交接之处, container outer how to, versus 交之处都必 must using/adopting 圆角 渡, this can large large improve/increase container rigid degree, meanwhile can improvement plastics features, can dispersion force, decrease/reduce deformation.

3.  demolding degree

is molding parts demolding, in design container must has combined demolding degree. demolding degree small, demolding difficult, loss container surface; large effect/influence dimensions degree.

demolding degree parts 形状, plastics types type, mold structure, surface coarse degree, molding methods and other different 而异. generally 说, parts demolding direction commonly used degree is 1º~1.5º, most small small 于0.5º.