Shanghai Daoqin Plastics Co., Ltd.

每 injection molding product in design 时首先 need its mold opening direction and separation type 线, ensure can can decrease/reduce slip block machine and remove separation type for appearance effect/influence.

1, mold opening direction rear, product add strong/high 筋, 卡扣, and other structure can can design formed and mold opening direction 一致, 以避免抽芯 decrease/reduce 拼缝线, long mold lifespan.

2, mold opening direction rear, can selection separation type 线, mold opening direction in 倒扣, improvement appearance and property can.

1, demolding degree can product 拉毛(拉花). light slip surface demolding degree 应≥0.5 degree, fine 皮纹(砂面) surface large 于1 degree, coarse surface large 于1.5 degree.

2, demolding degree can product 顶伤, 如顶白, deformation, 顶破.

3, deep structure product design outer surface degree amount requirements large inner surface degree, ensure injection molding mold type 芯不偏位, to uniform product thick, ensure product 开口部位 材 material strong/high degree.

1, various plastics has 一定 壁 thick scope/range, generally 0.5～4mm, thick ultra- 4mm时, will cooling time long, generate shrink and other issues, 应考虑改变 product structure.

2, thick 不均会引起 surface sink marks.

3, thick 不均会引起 gas and 熔接痕.

1, add strong/high combined application, can increase product rigid property, decrease/reduce deformation.

2, add strong/high thick degree must ≤(0.5～0.7)T product thick, 否则引起 surface sink marks.

3, add strong/high mono degree large 于1.5°, 以避免顶伤.

1, 圆角太 small can can product force in, product cracking.

2, 圆角太 small can can mold type force in, type cracking.

3, combined 理 圆角, also can improvement mold processing process, type can use R刀铣 processing, 而避免 low efficiency electrical processing.

4, different can can 会引起 separation type 线 移动, combined 实际情况 selection different or 清角.

1, 孔 形状应尽 amount simple, generally 取圆形.

2, 孔 轴 toward and mold opening direction 一致, can 避免抽芯.

3, long ratio large 于2时, 应设置 demolding degree. 此时孔 直径应按 small dimensions (most large dimensions)计算.

4, long ratio generally ultra- 4. anti 孔针冲弯

5, and product 边缘 距离 generally large 于孔径 dimensions.

1, parts mold opening direction can demolding 时, design slip block machine 构. machine slip block can molding complex product structure, easy product 拼缝线, sink marks and other defect, increase mold cost shrink short mold lifespan.

2, design injection molding product 时, 如无特殊 requirements, amount 避免抽芯 structure. 如孔轴 toward and direction is mold opening direction, utilizing type type 芯碰穿 and other methods.

1, utilizing PP material tough property, can will design formed and product 一体.

2, as is film dimensions small 于0.5mm, maintain uniform.

3, injection molding 一体铰链时, gate can design in certain 一侧.

1, in injection molding product in 镶入嵌 parts can increase local strong/high degree, hardness, dimensions degree and small 螺纹孔(轴), meet/satisfy various demand. meanwhile increase product cost.

2, parts generally is copper, can is its it metal or plastics parts. injection molding 汇专注 is injection molding provide injection molding technology training improvement inquiry.

3, parts in plastics in separation design and anti structure. 如: 滚花, 孔, 折弯, pressure 扁, and other.

4, parts plastics 应适当 add thick, anti parts force cracking.

5, design parts 时, separation its in mold in methods (孔, 销, magnetic property)

product generally in product inner surface relatively 平坦处, using/adopting 凸起形式, selection method toward and mold opening direction can can 一致 面处设置标识, can 避免拉伤.

due to injection molding shrinkage rate non-uniform property and 不确定 property, injection molding parts degree obvious low metal parts, can simple sleeve/set use machine parts dimensions 公差应按标淮 selection 适当 公差 requirements.我国也于1993 year published GB/T14486-93《 engineering plastics plastics parts dimensions 公差》, design can according to use plastics raw materials and made parts use requirements, according to in 规定确定 made parts dimensions 公差. meanwhile need according to factory comprehensive force, product design degree 确定适 combined design 公差精 degree.

improve/increase injection molding product structure rigid property, decrease/reduce deformation. amount 避免平 sheet/plate structure, combined 理设置翻边, structure. combined add strong/high 筋.

1, will plant/unit design formed more meanwhile use, make overall plant/unit 不会因 is 别扣位 loss bad can as, from increase its use lifespan, again is more add 圆角, increase strong/high degree.

2, is related dimensions requirements separation 严谨, 倒扣位置 more easy formed loss bad; versus 反, 倒扣位置 less assembly difficult control or combined separation 出现 松 phenomenon. solutions is need 预留改模容 easy add methods achieve.

1, using/adopting welding, can improve/increase strong/high degree.

2, using/adopting welding, can product design.

1. design injection molding product must comprehensive product appearance, property can and process between 矛盾. has 时牺牲部 separation process property, can to very good appearance or property can.

2. structure design in method injection molding defect 时, can can let defect in product 隐蔽部位.

自攻螺 filament filament 柱孔径

M2    1.7mm

M2.3  2.0mm

M2.6  2.2mm

M3     2.5mm

1, 支柱尽 amount need mono use, amount 连接至 outer or and add strong/high 筋一同 use, is add strong/high strong/high degree and make material flow more 顺畅.

2, high degree generally is ultra- 支柱直径 两倍 semi. high 支柱会导致 plastics parts molding gas (long degree long 时会引起 gas 孔﹐烧焦﹐ short shot and other).

3, high degree ultra- 支柱直径 两倍 semi, especially is outer 壁 支柱, add strong/high strong/high degree methods is use add strong/high 筋.

4, BOSS 形状以圆形 is 主﹐ its it 形状则 processing easy.

5, BOSS 位置不 can 太接近转角 or outer 侧壁, and product outer maintain 一段距离.

6), BOSS周围 can use remove separation thick (即开火山口) anti shrinkage lower 陷.

7), BOSS 拨模角 degree: usually outer 取0.5°, inner 取0.5° or 1.