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注塑成型加工缺陷解决之道

来源:http://www.sdlqmj.com 日期:2021-01-13 发布人:liqiang 浏览次数:
注射模塑缺点和反常现象更终集中在注塑件制品的质量上反映出来。注塑件制品缺点可分成下列几点:
The defects and abnormal phenomena of injection molding are finally reflected in the quality of injection molded parts. The disadvantages of injection molded parts can be divided into the following points:
(1)产品注射不足;(2)产品溢边;(3)产品凹痕和气泡;(4)产品有接痕;(5)产品发脆;(6)塑料变色;(7)产品有银丝、斑纹和流痕;(8)产品浇口处混浊;(9)产品翘曲和收缩;(10)产品尺寸不准;(11)产品粘贴模内;(12)物料粘贴流道;(13)喷嘴流涎。
(1) Product injection is insufficient; (2) product overflow; (3) product dent and bubble; (4) product joint mark; (5) product brittle; (6) plastic discoloration; (7) product silver wire, speckle and flow mark; (8) product gate turbidity; (9) product warpage and shrinkage; (10) product size is not accurate; (11) product paste in mold; (12) material paste flow channel; (13) nozzle salivation.
济南注塑加工
下面一一叙述其产生的原因及克服的办法:
The causes and solutions are described as follows
⒈怎样克服产品注射不足产品注料不足往往由于物料在未充满型腔之前即已固化,当然还有其他多种的原因。
1. How to overcome the insufficient injection of products? The insufficient injection of products is often due to the solidification of materials before filling the cavity. Of course, there are many other reasons.
⑴设 备原因:① 料斗中断料;② 料斗缩颈部分或全部堵塞;③ 加料量不够;④ 加料控制系统操作不正常;⑤ 注压机塑化容量太小;⑥ 设备造成的注射周期反常。
(1) equipment reasons: ① hopper interruption; ② hopper necking partially or completely blocked; ③ insufficient feeding amount; ④ abnormal operation of feeding control system; ⑤ too small plasticizing capacity of injection press; ⑥ abnormal injection cycle caused by equipment.
⑵注塑件条件原因:① 注射压力太低;② 在注射周期中注射压力损失太大;③ 注射时间太短;④ 注射全压时间太短;⑤ 注射速率太慢;⑥ 模腔内料流中断;⑦ 充模速率不等;⑧ 操作条件造成的注射周期反常。
(2) the reasons for injection molding conditions: ① the injection pressure is too low; ② the injection pressure loss is too large in the injection cycle; ③ the injection time is too short; ④ the injection full pressure time is too short; ⑤ the injection rate is too slow; ⑥ the material flow in the mold cavity is interrupted; ⑦ the filling rate is not equal; and (8) the injection cycle caused by operating conditions is abnormal.
⑶温度原因:① 提高料筒温度;② 提高喷嘴温度;③ 检查毫伏计、热电偶、电阻电热圈(或远红外加热装置)和加热系统;④ 提高模温; ⑤ 检查模温控制装置。
(3) temperature reasons: ① increase the barrel temperature; ② increase the nozzle temperature; ③ check the millivoltmeter, thermocouple, electric resistance coil (or far infrared heating device) and heating system; ④ increase the mold temperature; ⑤ check the mold temperature control device.
⑷注塑件模具原因① 流道太小;② 浇口太小;③ 喷嘴孔太小;④ 浇口位置不合理;⑤ 浇口数不足;⑥ 冷料穴太小;⑦ 排气不足;⑧ 注塑件模具造成的注射周期反常;
(4) the causes of injection mold are as follows: 1) the runner is too small; 2) the gate is too small; 3) the nozzle hole is too small; 4) the gate position is unreasonable; 5) the number of gates is insufficient; 6) the cold material cavity is too small; 7) the exhaust is insufficient; 8) the injection cycle caused by injection mold is abnormal; 6) the injection cycle caused by injection mold is abnormal;
⑸物料原因:物料流动性太差。
(5) material reason: poor material fluidity.
⒉怎样克服产品飞边溢料:产品溢边往往由于模子的缺陷造成,其他原因有:注射力大于锁模力、物料温度太高、排气不足、加料过量、模子上沾有异物等。
2. How to overcome product flash overflow: product flash is often caused by mold defects, other reasons are: injection force is greater than mold locking force, material temperature is too high, insufficient exhaust, excessive feeding, mold stained with foreign matter, etc.

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