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beplay全站app安卓加工时要把握好排气事项!

来源:http://www.jnhjgs.cn     发布时间:2021-07-07 14:20:28    点击:

beplay全站app安卓加工时会用到各种各样的设备,也会做各种各样的准备,但是有一项比较重要,就是加工过程中需要进行排气,下文就给大家讲讲为什么要进行排气。
Mold processing will use a variety of equipment, will do a variety of preparations, but there is a more important, is the need for exhaust in the process of processing, the following will tell you why to exhaust.
一、注射成型中的气体来源
1、 Gas sources in injection molding
1、浇注beplay全站app安卓时因热气较多并散发不完导致内部留有空气;
1. When pouring the mold, there is a lot of hot air which can not be exhausted, resulting in air inside;
2、个别原料内部水分较多,高温加持下成为水蒸气;
2. Some raw materials have more water in them, and become steam under high temperature;
3、某些不稳定的塑料在注射制模过程中因高温分解而产生的气体;
3. The gas produced by the high temperature decomposition of some unstable plastics in the process of injection molding;
4、各种化学物质融合产生化学反应也容易生成气体;
4. All kinds of chemical substances fuse to produce chemical reaction, which is also easy to produce gas;
                        济南beplay全站app安卓
二、排气不良的危害
2、 Harm of poor exhaust
注塑beplay全站app安卓的排气不良,将会给塑件的质量等诸多问题方面发展带来一系列的危害。主要工作表现形式如下:
Poor exhaust of injection mold will bring a series of harm to the development of many problems such as the quality of plastic parts. The main work forms are as follows:
1、在注塑过程中,熔体将更换腔内的气体。如果气体放电不及时,它会导致熔融填充,导致注射不足,不能填充腔。
1. During the injection process, the melt will change the gas in the cavity. If the gas is not discharged in time, it will lead to molten filling, resulting in insufficient injection, unable to fill the cavity.
2、如果气体过多,beplay全站app安卓也未冷却,气体形成的高压容易使beplay全站app安卓内部变形,导致beplay全站app安卓的质量降低;
2. If there is too much gas and the die is not cooled, the high pressure formed by the gas is easy to deform the inner part of the die, resulting in the quality reduction of the die;
3、由于气体被高度压缩,空腔内温度急剧升高,导致周围熔体分解烧灼,塑料件局部碳化烧焦。 主要出现在两个熔体,*角和浇口法兰的汇合处。
3. Because the gas is highly compressed, the temperature in the cavity rises sharply, resulting in the decomposition and burning of the surrounding melt, and the local carbonization and burning of the plastic parts. It mainly occurs at the confluence of two melts, * angle and gate flange.
4、气体的排放不自由,使熔体进入型腔的速度不同,容易形成流痕和熔痕,降低塑件的力学性能。
4. The gas emission is not free, so that the melt into the cavity at different speeds, easy to form flow marks and melt marks, reduce the mechanical properties of plastic parts.
5、由于腔内气体的突变,它将降低全速,影响模塑循环,降低生产率。
5. Due to the sudden change of gas in the cavity, it will reduce the full speed, affect the molding cycle and reduce the productivity.
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