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注塑加工时如何从注塑模具中找质量问题

来源:http://www.sdlqmj.com/ 日期:2022-08-11

模具在注塑加工时会存在着质量问题,究其原因是怎么样的呢?下面就让济南注塑加工厂家为您简单讲一讲吧。
There will be quality problems in the injection molding process. What is the reason? Now let Jinan injection molding factory give you a brief introduction.
在注塑过程中如发现塑料制品的几何形状不稳定、外形尺寸误差比较大,则可能是模具内腔的压缩比比较小;模具口模定型部分长度尺寸比较小;定径套变形或者是模具体温度不均匀。
In the process of injection molding, if it is found that the geometric shape of the plastic product is unstable and the overall dimension error is relatively large, it may be that the compression ratio of the inner cavity of the mold is relatively small; The length and size of the shaped part of the die are relatively small; The sizing sleeve is deformed or the mold temperature is not uniform.
如看到制品表面发黄,经常出现焦斑现象,则模具中的分流锥的扩展角度可能比较大,造成熔料流阻力大;模具熔料流道腔内可能有滞流区,料流不通畅;流道腔内有阻流异物。
If the surface of the product is yellow and the phenomenon of focal spot often occurs, the expansion angle of the shunt cone in the mold may be relatively large, resulting in large resistance of melt flow; There may be a stagnant area in the mold melt channel cavity, and the material flow is not smooth; There are flow blocking foreign matters in the channel cavity.
如制品表面纵向沟纹不间断,则可能有异物卡在流道腔内某一部位,定型部位有划伤痕迹、毛刺或有严重磨损粗糙面。
If the longitudinal grooves on the surface of the product are uninterrupted, there may be foreign matters stuck in a part of the flow channel cavity, and there are scratches, burrs or severely worn rough surfaces on the shaped part.
济南注塑加工
原料中含水份较多或挥发物含量过高。成型操作方面:熔体温度过低,低温熔体的分流汇合性能较差,容易形成熔接纹;熔体注射压力过低,使得注射速度过慢,熔体在型腔中的温度不相同,这时熔体在分流汇合时就易产生熔接纹。注塑机设计和塑胶件设计方面:在此不作讲述。
The raw materials contain too much water or too much volatile matter. Molding operation: the melt temperature is too low, the low-temperature melt has poor shunting and confluence performance, and it is easy to form fusion lines; The injection pressure of the melt is too low, so the injection speed is too slow, and the temperature of the melt in the cavity is different. At this time, the melt is easy to produce fusion lines when it is divided and merged. Injection molding machine design and plastic parts design: not described here.
波纹:模具方面:与熔接纹大同小异,但需特别强调的是冷料对波纹影响大。原料方面:熔体流动性差是产生波纹的主要原因,如:PMMA、PC、AS等透明料制品;当ABS材料是经改性为共聚型高分子材料时,如加工温度过高,树脂及润滑剂会产生挥发性气体,这些气体使塑胶件表面形成波纹。成型操作方面:注射速度过小;熔体流速过大;模具温度偏低。
Corrugations: in terms of molds, it is similar to the welding lines, but it needs to be emphasized that the cold material has a great impact on the corrugations. Raw materials: poor melt fluidity is the main reason for ripple, such as PMMA, PC, as and other transparent materials; When the ABS material is modified into a copolymer polymer material, if the processing temperature is too high, the resin and lubricant will produce volatile gas, which will form ripples on the surface of the plastic part. Molding operation: the injection speed is too low; The melt flow rate is too large; The mold temperature is low.
注塑加工时如何从注塑模具中找质量问题大概内容就是怎样了,您可以来网站http://www.sdlqmj.com咨询更多问题的解决办法。
How to find quality problems from injection molds during injection molding is the general content. You can visit the website http://www.sdlqmj.com Ask for solutions to more problems.

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