| 塑料挤出机知识介绍 |
| 添加时间：2021/7/15 9:26:02 浏览次数： |
| 挤出机组、晶点处理 Extruder, crystal point treatment (一) 挤出机组 （1） Extruder unit 挤出机机筒加热部分:国内挤出机组一般采用不锈钢加热圈或铝加热圈加热,这两种加热圈没有热膨胀装置,加热时因螺丝的各膨胀点不同,长期加热,有松动现象,使得机筒贴紧度不好。 Extruder barrel heating part: domestic extruder units generally use stainless steel heating ring or aluminum heating ring for heating, these two kinds of heating rings have no thermal expansion device, because the expansion points of screws are different during heating, long-term heating leads to looseness, which makes the barrel not tight. 现国内很多大型或合资厂家已改用风冷式陶瓷加热器,这种盖土网 防寒布 麻绳 油麻绳 麻刀 沥青麻绳 静压造型线 自动浇注机 铸铁拍门 钢制拍门 玻璃钢拍门加热器都装有热膨胀装置,内有高强度弹簧,永远保持一定的压力,使发热圈紧贴机筒,加不加热都很紧,也非常省电。另外,模头加保温层也是省电的一种方法。 At present, many large-scale or joint venture manufacturers in China have changed to air-cooled ceramic heaters. These heaters are equipped with thermal expansion devices, with high-strength springs inside, which always maintain a certain pressure, so that the heating ring is close to the barrel, and it is very tight with or without heating, which also saves electricity. In addition, mold head with insulation layer is also a way to save electricity. (二) 晶点处理 （2） Crystal point treatment 三台挤出机压力大小差距太大,挤出不稳定,造成晶点多。通常的做法是加大过滤网。以仕诚公司为例,在挤出机前加装一个背压装置,把压力调至三台挤出机差距小点,这样晶点会小很多。 The pressure difference between the three extruders is too large, the extrusion is unstable, resulting in more crystal points. The usual practice is to enlarge the filter screen. Take Shicheng company as an example, a back pressure device is installed in front of the extruder to adjust the pressure to the smaller gap between the three extruders, so that the crystal point will be much smaller. |
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