Shanghai Daoqin Plastics Co., Ltd.

1．雾 gas (Moisture streaks)……………………………………………………………………
2． glass fiber (GF) separation 配不均(Glass Fiber Streaks)……………………………………………………
3．困 gas (Gas Trap Effect)……………………………………………………………………
4． silver streaks 纹(Sliver Marks)…………………………………………………………………………
5．结 combined 线(Weld Line)…………………………………………………………………………
6． water 波纹(Water Wave Effect)……………………………………………………………………
7． black spots (Dark Spots)………………………………………………………………………………
8． ejection 印(Visible Ejector Marks)…………………………………………………………………
9． deformation (Deformation During Demolding)…………………………………………………………
10． filling 不足(Short  Filling)……………………………………………………………………
11． cold material flow marks (Cold Slug)……………………………………………………………………………
12．进 gate defect (Dull Spots Near The Spure)……………………………………………………
13.喷射痕 (Jetting)………………………………………………………………………………
14. surface 起层(Flaking Of The Surface Layer)…………………………………………………………
15.浮泡(Entrapped Air)………………………………………………………………………………
16. hot color (Burnt Streaks)…………………………………………………………………………
17. crazing (Stress Crack)…………………………………………………………………………
18. sink marks 痕(Sink Marks)…………………………………………………………………………
19. true bubbles (Density Bubble)……………………………………………………………………
20.披风(Flash)……………………………………………………………………………………
21. scratch 伤印(Scratch Marks)…………………………………………………………………………
1﹒雾 gas (Moisture streaks)
formed 因:
due to type upper generate 一 不 can melt combined material separation in parts between (can can is water 份, gas 体), also or in plastics 进入时遇 upper difficult, make its can full mold has type 面.
improvement methods:
a) plastics
．检查 plastics MFI value
．检查 plastics formulation
． amount degree plastics wet degree
b) mold
． cooling pipeline has 否渗漏
．模面拋 light defect
c) injection molding machine conditions
． mold temperature cold
． demolding agent more
． increase plastics drying degree
2. glass fiber (GF) separation 配不均(Glass Fiber Streaks)
formed 因:
基于 glass fiber (GF) long degree effect/influence, due to flow 时 熔 melt flow front direction and toward 关系, and flow speed degree and cooling speed degree 变化, or glass fiber (GF) defect, 一 竖立, 一 斜立, therefore glass fiber (GF) 浮面(glass fiber (GF) separation 配不均) phenomenon. this type of remove effect/influence appearance outer also reduce injection molding parts engineering structure.
improvement methods:
a) plastics
． more relatively short glass fiber (GF) material
? 换玻璃珠材 material
b) mold
． more 改入闸口 value amount
c) injection molding machine conditions
． increase injection speed degree
． increase mold temperature degree
． increase material temperature degree
． increase holding pressure time
． increase holding pressure pressure
．检查射嘴 temperature degree is 否足够
3.困 gas (Gas Trap Effect)
causes:
this type of is due to mold inner in gas defect 至, defect can design, selection material or injection molding conditions defect generate.

improvement methods:
a) mold
．检查排 gas is 否畅通
． increase gas 道
．改变入 gate 位置
b) injection molding machine conditions
． decrease low injection molding speed degree
． decrease low pressure
． decrease low injection molding temperature degree

4. silver streaks 纹(Sliver Marks)

formed 因:
this type of is due to mold inner has a large amount of water gas or material inner hot melt plastics has a large amount of by gas water
份, has can can is additives chemical reaction gas / water 份, in injection molding process in by type 腔,
并 by pressure 至放射形 silver streaks 纹态状.

improvement methods:
a) plastics
． plastics is 否适当
b) mold
． cooling pipeline has 否渗漏
．避免 于尖角 design
． decrease/reduce deep degree
c) injection molding machine conditions
． increase drying temperature degree
． increase drying time
． increase back pressure force
． decrease/reduce 倒锁
． decrease low injection speed degree
．检查射 value 密封程 degree
．检查/ more material and other additives

5.结 combined 线(Weld Line)
formed 因:
injection molding parts due to in process in to defect combined, therefore generate combined 线. in flow process in generate similar types 情况(熔 combined 线MeldLine). large generate causes same. is parts design defect or is injection molding conditions 欠佳而 most important is due to combined 流峰时 generate ≥10 degree temperature degree drop.

improvement methods:
a) plastics
more relatively high flow and other grade
b) mold
．避免 design thick thin 突变
．闸口不应设立于 thin 位处
．检查排 gas is 否闭塞
． increase mold surface treatment
．门口迁位(目 will combined 线迁位)
c) injection molding machine conditions
． increase processing mold temperature degree
． increase injection speed degree
． increase temperature degree
． increase holding pressure pressure

6. water 波纹(Water Wave Effect)
causes:
injection molding parts due to in process in upper defect cooling conditions, injection molding speed degree low, or material temperature degree low therefore generate water 波纹现像. is plastics 一边进入一边急 speed cooling, can 顺利移动 will plastics pressure toward 模壁, plastics is 幅射形态推进, cooling rear surface make formed water 波纹/手指模纹.
improvement methods:
a) plastics
． more relatively high flow and other grade
b) mold
． increase large 闸口直径
． increase large runner 直径
c) injection molding machine conditions
． increase injection molding speed degree
． increase injection molding pressure (第一段)
． increase plastics temperature degree
． increase mold temperature degree
注: application mold temperature degree control machine and add upper mold thermal insulation sheet/plate.

7. black spots (Dark Spots)
formed 因:
injection molding parts black spots phenomenon, causes is due to 不清洁 做 formed. 而不清洁 源亦 non 常广范, has 关 源: injection molding as control, mold and abrasion loss, injection molding machine material 筒不洁 and abrasion loss, Raw Materials 污染/翻模 material and other.
improvement methods:
a) plastics
．检查/ more Raw Materials
．检查/ more abrasion material
．检查/ more additives
b) mold
．检查/ optimization mold runner 死区
．检查 mold is 否清洁
． more abrasion loss mold parts
．检查/清洁 hot system
c) injection molding machine conditions
． decrease low material temperature degree
． adjustment hot temperature degree
． adjustment 恰当余 material amount
．清洗 injection molding machine material 筒
．检查 injection molding machine material 筒, screw, 止回阀 is abrasion loss

8. ejection 印(Visible Ejector Marks)
formed 因:
injection molding parts ejection phenomenon, formed is due to demolding difficult formed. formed demolding difficult causes basic upper has types 情况: types is parts in mold by solid 化不足, types is mold design / made as defect generate.
improvement methods:
a) plastics
． more has high demolding can additives and other grade material
b) mold
．检查 cooling pipeline 畅顺/校 rate
． increase cooling pipeline
． increase mold lower light slip
． increase mold 抜模斜 degree
．检查/ increase mold gas 道
． optimization ejection system
c) injection molding machine conditions
． decrease low holding pressure pressure
． decrease low holding pressure time
． optimization pressure 点
． decrease low mold temperature degree
． optimization ejection speed degree
． increase cooling time
注: application mold temperature degree control machine add upper mold hot sheet/plate.

9. deformation (Deformation During Demolding)
formed 因:
injection molding parts deformation phenomenon, formed in type ring lower generate: types is demolding 时/ demolding rear 立即出现; types is demolding rear time 才出现. types is due to solid conditions defect / mold design defect formed deformation, types injection molding parts deformation is in injection molding process upper provide defect pressure conditions 致.
improvement methods:
a) plastics
． more strong/high degree relatively high / fiber reinforcement plastics product types
． more has high demolding can additives and other grade 材科
b) mold
．检查 cooling pipeline 畅顺/校 rate
． increase cooling pipeline
． increase mold lower light slip degree
． increase mold 抜模斜 degree
．检查/ increase mold gas 道
． optimization ejection system
． increase mold strong/high degree
． increase parts 肋骨
c) injection molding machine conditions
． reduce holding pressure pressure
． reduce holding pressure time
． optimization pressure 点
． decrease low mold temperature degree
． optimization ejection speed degree
． increase cooling time
注:另一 types is " shrinkage rate large generate deformation. versus for need increase injection molding pressure and injection molding time.

10. filling 不足(Short  Filling)
formed 因:
injection molding parts filling phenomenon, causes in type ring lower generate: types is belongs to defect injection molding processing 操 as factors generate; types belongs to injection molding parts design defect 导致. injection molding processing factors generate defect more due to injection molding process in plastics from 闸口至 filling formed front, upper large temperature degree drop and pressure drop effect/influence. injection molding parts design defect defect, more due to 闸口开设 defect /太远, thick thin 不均, overall thin, design made, gas defect and other.
improvement methods:
a) plastics
． more relatively high flow and other grade
b) mold
． optimization 闸口开设位置
． optimization parts thick
． optimization design
．检查/ increase mold gas 道
． increase parts 辅助支流(sub Flow)
c) injection molding machine conditions
． increase injection molding amount
． increase injection molding melt temperature degree
． increase injection molding pressure / holding pressure pressure
． increase injection molding speed degree
． increase injection molding time
． increase mold temperature degree
． decrease low pressure
． use injection molding machine types

11﹒ cold material flow marks (Cold Slug)
formed 因:
injection molding parts cold material flow marks phenomenon, formed is melt plastics through in or 射咀时提早 light micro solid 化, and rear melt plastics 一拼进入 type generate. 情况严 heavy has non deep 刻 结 combined 线差不 more.
improvement methods:
a) mold
． increase / optimization cold material 井
b) injection molding machine conditions
． increase / optimization temperature degree
．改 use fine 孔射咀
． decrease/reduce 倒索
． use system

12﹒进 gate defect (Dull Spots Near The Spure)
formed 因:
injection molding parts 出现进 gate defect phenomenon, is high 剪切应 force 裂化情况, more in water 式闸口 and degree relatively high plastics parts upper. formed is high degree melt plastics through in fine 开口时, need high speed, high pressure can through, therefore in 入闸口附近 generate 荷裂化 defect.
improvement methods:
a) plastics
． more relatively high flow and other grade plastics
． use improvement flow additives
b) mold
． increase mold 闸口直径
． increase mold runner light degree
． more 改闸口位置
c) injection molding machine conditions
． decrease low injection molding speed degree
． grade optimization adjustment injection molding speed degree (S-F)
． increase injection molding melt temperature degree
． increase mold temperature degree
use injection molding machine types

13. 喷射痕(Jetting)
formed 因:
injection molding parts 出现喷射痕(蛇仔纹) defect phenomenon, formed is injection molding machine for plastics amount 不足, or plastics in full melt lower, through and rear melt plastics 一并进入 type generate 情况.
improvement methods:
a) mold
． increase mold 闸口直径
． more 改闸口位 amount
． increase in front
b) injection molding machine conditions
． decrease low injection molding speed degree
． grade optimization adjustment injection molding speed degree (s-F)
．检查/ increase injection molding melt temperature degree
． increase mold temperature degree
． increase back pressure pressure
． use injection molding machine types

14. surface 起层(Flaking Of The Surface Layer)
causes:
injection molding parts surface defect phenomenon, formed is injection molding parts plastics formulation in formed rear generate full combined, or plastics formulation inner (包括 additives) in formed rear generate separation phenomenon.
improvement methods:
a) plastics
．检查/ more plastics mixed combined formulation
．检查/ more plastics additives mixed combined formulation
b) injection molding machine conditions
．检查 plastics drying conditions
．检查/ optimization screw speed degree
．检查 plastics 塑化程 degree
． decrease low injection speed degree
． decrease low material temperature degree
． increase mold temperature degree

15.浮泡(Entrapped Air)
formed 因:
injection molding parts 出现浮泡 defect phenomenon, formed is injection molding parts in material process in mixed a large amount of gas, or in use degree function 时抽入 a large amount of gas, and in injection molding process 一并注入 mold type inner, plastics formulation transparent and other grade, more easy 看见此 phenomenon.
improvement methods:
a) plastics
．检查 plastics is large
b) injection molding machine conditions
． decrease/reduce function
． increase back pressure
． decrease low screw speed degree
．检查熔 material system is positive as

16. hot color (Burnt Streaks)
formed 因:
injection molding parts hot color defect phenomenon, formed has more 方面若 polymer hot degree, separation 子链便会 generate separation 裂, and thermal degradation or 燃烧, this 时便会出现 can hot color phenomenon. has 时 见一 黄 color color 变亦显示 already 经出现 light micro thermal degradation, thermal degradation mono polymer 燃烧引致, polymer inner agent is 导因.
处理燃烧 defect need in 甚么 方出现, melt in machine has 出现咖啡, 黄, color 变, melt in 离开炉嘴 rear 始发生燃烧, 应该检查主径, runner, water and mold design or positive injection molding speed degree, pressure and other.
若清 machine 时发现咖啡 strip/profile or color 变, degradation in 炮筒, inner 发生.
若 meanwhile to strip/profile and color strip/profile 纹, 便应怀疑 is water separation 方面出 issues
若位置 solid 定而部 parts formed product type 一样, 燃烧便 is 源于检查阀门 or 炉嘴尽头.
若 color dispersion, degradation is in 炮筒, screw (进 material 口侧)发生.

improvement methods:
a) plastics
．检查, more plastics additives mixed combined formulation
． decrease small abrasion material ratio/proportion
b) mold
． optimization parts 尖角
． increase runner /闸口直径
． optimization parts thick
．检查排 gas 信道
．检查 hot runner system
c) injection molding machine conditions
． decrease low injection molding amount
． decrease low injection molding melt temperature degree
． decrease low screw speed degree
． decrease low back pressure
． grade optimization injection molding speed degree (s-F)
．检查熔 material system is positive as
． decrease low cycle
．检查 drying system 清洁
．检查 injection molding system is positive 常
． use injection molding machine types

17. crazing (Stress Crack)
formed 因:
injection molding parts crazing defect phenomenon, formed is injection molding parts plastics in injection molding process in large 剪切应 force processing aging, 出现时就 is it crazing process plastics in injection molding process in 受剪切应 force bad process, is plastics in add hot 不足, flow 不佳 情况 lower, strong/high will it use relatively large pressure type inner injection molding is, separation degree long,当 aging it easy fracture generate cracks, transparent parts more easy 看见此 phenomenon.
improvement methods:
a) mold
． increase runner /间口直径
． optimization parts thick
b) injection molding machine conditions
． grade optimization injection molding pressure
．延迟转换 holding pressure pressure
． decrease low holding pressure pressure
． decrease low injection molding speed degree
． increase temperature degree (无定形 material)
． increase mold temperature degree (无定形 material)
． increase cooling time (无定形 material)
． decrease low injection molding temperature degree (crystallization material)
． decrease low mold temperature degree (crystallization material)
． decrease low cooling time (crystallization material)
． use injection molding machine types

18. sink marks 痕(Sink Marks)
formed 因:
injection molding parts sink marks defect phenomenon, causes has more 方面, 例如: 不洽当 selection plastics features, defect parts design and relatively injection molding conditions and other 都会导致 has sink marks 痕出现.
will upper 述各项 sink marks formed 因 源 analysis rear, summary below/following 几点: plastics solid slow, has holding pressure time 不足, has holding pressure low and holding pressure defect.

improvement methods:
a) plastics
．检查 plastics conditions
． more low shrinkage and other grade material
．添 add foaming agent
b) mold
．检查 mold gas 线
．检查 mold 主流径 and dimensions
． improvement mold thick
． improvement mold thick and 肋骨位 between thick degree ratio rate
． increase mold cooling pipeline
c) injection molding machine conditions
． increase material amount
．检查 injection molding machine screw 止回阀
． increase cooling time
．检查/移 remove material poly material
． optimization holding pressure time (+)
． optimization holding pressure pressure (+)
．改变 mold temperature (-)
．改变 material temperature (-)
．改变 injection molding speed rate (-)
} sink marks 印出现 in 闸口附近 or in thick 位置?
} sink marks 印出现不 in 闸口附近 or in thin 壁位置?
19. true bubbles (Density Bubble)
formed 因:
injection molding parts true bubbles defect phenomenon, formed main/primary is injection molding parts plastics in injection molding process in to density filling 致. parts to density filling causes large more and plastics type 别(crystallization 形/无定形), runner 闸口 早停止进入 plastics or parts design defect has 关.
improvement methods:
a) plastics
．检查 plastics type 别(crystallization 形/无定形)
． more low bubbles amount plastics (PP)
b) mold
．检查, increase mold gas 道
． decrease short mold and runner
． increase dimensions
． decrease low mold thick
． optimization mold thick thin between versus ratio rate
c) injection molding machine conditions
． increase injection molding amount
． optimization injection molding amount (咕臣)
． grade optimization injection molding pressure
． increase holding pressure pressure
． increase injection molding speed degree
． increase injection molding temperature degree
． increase mold temperature degree
． increase injection molding time
． increase cooling time
20.披风(Flash)
formed 因:
injection molding parts 出现披风 defect phenomenon, formed main/primary is injection molding parts in injection molding process in to separation plastics filling 致. parts separation filling causes, large more and plastics and other grade (flow 指数MFI), parts design defect, loss bad or injection molding machine types, injection molding machine can and adjustment has 关.
improvement methods:
a) plastics
． more relatively low flow and other grade material
b) mold
．检查 mold loss bad
． optimization mold thick thin between versus ratio rate
． more 改闸口位置
．检查/ reinforcement mold structure and strong/high degree
c) injection molding machine conditions
． grade optimization injection molding pressure
． decrease low injection molding pressure
． optimization holding pressure pressure 转换位置
． decrease low holding pressure pressure
． decrease low injection molding speed degree
． decrease low holding pressure time
． decrease low injection molding temperature degree
． decrease low mold temperature degree
． increase pressure
． more clamping force relatively large machine types
21. scratch 伤印(Scratch Marks)
formed 因:
injection molding parts scratch defect phenomenon, formed main/primary is injection molding parts in injection molding formed rear demolding process in and mold and 边角间 generate separation abrasion scratch 致. parts generate separation abrasion scratch causes, large more and parts demolding degree 不足, structure strong/high degree 不足, loss bad or injection molding machine can and injection molding parameters adjustment has 关.
improvement methods:
a) plastics
． more has high demolding can additives and other grade material
b) mold
．检查 mold upper 模夹线 loss bad
． increase mold upper light slip degree
． increase mold 出模斜 degree
．检查/ reinforcement mold structure and strong/high degree
．检查/ increase upper mold gas 道
．检查 cooling pipeline 畅顺/校 rate
． increase upper cooling pipeline
c) injection molding machine conditions
． optimization holding pressure pressure 转换位置
． decrease low holding pressure pressure
． decrease low injection molding speed degree
． decrease low holding pressure time
． decrease low injection molding temperature degree
． decrease low mold temperature degree
． decrease low mold 开启首段 speed degree