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常見啤塑缺陷及原因分析
COMMON INJECTION DEFECTS AND THE REASON ANALYSIS
Phenomena
現象
Inferior Sample
不良樣本
Molding Machine, Molding Condition
啤塑條件
Mold, Material
模具,材料
Burr
披鋒
High Injection Pressure
啤塑壓力高
Lack of Clamping Force
鎖模力不足
Excessive Supply of Molding Material
熔料過多
High Resin Temperature
料溫過高
Long Holding Time of Injection Pressure
保壓時間太短
No Mold Align or Lack of Contact of Parting Surface
模具不對中或分型面接
Excessively Large Projected Area of Mold Cavity
型腔投影面積太大
Low Resin Viscosity During Molding
啤塑期間溶料粘度低
Sink Marks
縮水
Low Injection Pressure
啤塑壓力偏低
Short Holding time of Injection Pressure
保壓時間太短
Slow Injection Speed
啤塑時間太慢
Small Supply Amount of Molding Materials
熔料不足
High Resin Temperature
熔料溫度高
Excessively High or Uneven Mold Temperature
模具溫度過高或不穩定
Small Gate
水口偏小
Existence of Resistance Due to Narrow Runner and Sprue
流道,分流道狹窄而引起的阻力
Thick Section is Provided in the Cavity
收縮處截面偏厚
High Resin Shrinkage Ratio
村料收縮率高
Silver
Streaks and Spray marks
銀紋,料花
Inferior Plasticizing
塑化不良
Resin is Overheated and Resolved
熔料過熱分解
Excessively High Injection Speed
啤塑壓力過高,啤塑速度太快
Excessively High Injection Pressure and Injection Speed is Too Fast
啤塑壓力過高,蜱塑速度太快
Air Inside Screw (Lack of Back Pressure and Compression)
啤塑螺杆中有空氣
Low Mold Temperature
模具溫度低
Lack of venting
排氣不良
Incorrect Gate placement
水口位置不當
Inferior Cavity Design
模腔干燥不合理
Insufficient Resin Drying
膠料干燥不充分
flow
Marks
流動紋/走水紋
Temperature Too Low and Lack of Fluidity
溫度太低,流動性差
Slow Injection Speed
啤塑速度
Excessively Small Nozzle
噴嘴過小
Injection Holding Pressure Too Low
保壓壓力太低
Mold Temperature Too Low
模具溫度太低
Improper Mold Cooling
模具冷卻不合理
Resin Does Not Flow Well
熔料流動性差
Phenomena
現象
Inferior Sample
不良樣本
Molding Machine, Molding Condition
啤塑條件
Mold, Material
模具,材料
oudy, Appearance
色澤陰暗
Uneven Melting of Partially Overheated Resin
料溫太低,流動性差
Cold Nozzle
噴嘴溫度低
Excessively High or low Injection Speed
過高或過低的注射速度
Overheated Resolution of Resin
熔度過熱分解
Excessively High or Excessively Low Mold Temperature
過高或過低的模具溫度
Excessively Small Gate, Runner and Sprue
過小的水口,流道,分流道
Water and Oil Adhering to Mold Surface
模具表面粘有水和油
Insufficient Resin Drying
膠料干燥不充分
Volatile Amount of Lubricant for Resin
膠料潤滑濟易揮發
Poor Weld Lines
夾水紋
Resin Temperature Too Low and Lack of Fluidity
料溫太低,流動性差
Low Injection Pressure
啤塑壓力低
Slow Injection Speed
注塑速度慢
Cold Nozzle
噴嘴溫度低
Path from Gate to Welded Section is Too Long
水口距熔接區路徑太長
Mold Temperature Too Low
模具溫度太低
Improper Position and Number of Gates
水口得置,數量不合理
Insufficient Resin Drying
膠料干燥不充分
Resin Does Not Flow Well
熔料流動性差
Void
凹孔
Low Injection pressure
注射壓力低
Lack of Injection Holding Pressure
保壓壓力不足
Excessively High of Low Injection Speed
注射溫度過高或過低
Short Holding Time
保壓時間短
Inferior venting
排氣不良
Inferior Cavity Design (Thick Sections and Drastic Thickness Changes)
型腔設計不合理(壁太厚及壁厚突變)
Improper Gate Position
水口位置不合理
Excessively Small Gate, Runner and Sprue
水口,流道,分流道過小
High Material Shrinkage Ratio
膠料收縮率太高
REDO
Z
Phenomena
現象
Inferior Sample
不良樣本
Molding Machine, Molding Condition
啤塑條件
Mold, Material
模具,材料
Black Streaks Burn Marks
黑條紋,燒焦
Resin Partially Overheated Due to Residue in the Cylinder and Others
由于料筒或其他部件中的殘余膠料,使膠料局部過熱
Inferior Nozzle Attachment
噴嘴在料筒中持續時間長
High Injection Speed
啤塑速度高
Long Holding Time of Materials
膠料在料筒中持續時間長
High Cylinder Temperature and Injection Pressure
料筒溫度過高,啤塑壓力太高
Grease and Oil Adhering to Mold Cavity
型腔有油脂
Overheated and Resolved Resin Due to Friction at the Gate Section
由于在水口處摩摩擦引起膠料過熱分解
Inferior Exhaust
排氣不良
Excessive Solvent
色粉過多
Crazing and Cracking
裂紋
Injection Pressure Too High
啤塑溫度太高
Low Resin Temperature and Lack of Fluidity
膠料溫度低,流動性差
Injection Holding Pressure Too High
保壓壓力太高
Holding Pressure Time Too Long
保村時間太長
Excessively Wide Gate
水口太寬
Mold Temperature Too Low
模具溫度太低
Inferior Adhering of Parts
熔接不良
Inferior Cavity Design
型腔設計不合理
Improper Annealing
退火不當
Warpage
拗曲
Injection Pressure Too High
注射壓力太高
Injection Holding Pressure Too High
保壓壓力太高
Holding Pressure Time Too Long
保壓時間太長
Resin Temperature Too High
注射溫度太高
Slow Injection Speed
注射速度太慢
Inferior Mold Releasing
模具開啟不良
Improper Ejection
頂出機構不合理
Uneven Cooling, Insufficient Cooling
冷卻不穩定,不充分
Mold Temperature Too High
模具溫度太高
Improper Annealing
退火不當
Part Sticking
粘模
Injection Pressure Too High
注射壓力太高
Injection Holding Pressure Too High
保壓壓力太高
Holding Pressure Time Too Long
保壓時間太長
Excessive Material Supply
膠料過多
Resin Temperature Too High and Excessive Fluidity
膠料溫度太高,流動性太大
Molded Products Adhere to the Mold Due to Insufficient Cooling
冷卻不充分引起啤件粘模
Mold Temperature Too High
模具溫度太高
Nozzle Hole is Larger Than Sprue Hole
噴嘴孔比流道孔大
Excessively Small Sprue and Taper Section, Inferior Finish
流道及脫模斜度不足,表面光潔度低
Improper Ejection
頂出機構不合理
Excessively Small R in Mold Cavity, Lack of Taper, inferior Finish
訓型腔圓角R小
Phenomena
現象
Inferior Sample
不良樣本
Molding Machine, Molding Condition
啤塑條件
Mold, Material
模具,材料
Jetting
射紋
Excessively Cooled Nozzle
噴嘴過冷
Excessively Low Resin Temperature
料溫過低
Excessively Late Injection Speed
啤塑速度過緩
Inferior Gate Position
水口位置不當
Inferior Gate Size
水口尺寸不當
Excessively Thick Molded Products
啤件太厚
Low Mold Temperature
模具溫度太低
Short Shot
射膠不足
走水不齊
Lack of Molding Machine Injection Capacity
啤塑機啤塑容量不足
Lack of Material Supplying Amount
料量不足
Injection Pressure too Low
注射壓力太低
Low Resin Temperature, Lack of Fluidity
熔料溫度低,流動性差
Slow Injection Speed
啤塑速度慢
Resistance is Produced at the Nozzle
Section and head loss is High
噴嘴產生阻力,水壓損失大
Inferior Gate Balance
水口不平衡
Insufficient Vent
排氣不良
Excessively Small Gate, Runner and Sprue
水口,分流道,流道過小
Low Mold Temperature
模具溫度低
Clogged With Cold Slugs
冷料塊阻塞走水通道
Resin Does Not Flow Well
熔料流動性差
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