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模具加工​中的滚塑是什么?

来源:http://www.jnhjgs.cn     发布时间:2020-11-04 15:30:44    点击:

模具加工中滚塑又称旋转模塑是一种用于制造各种尺寸和形状的中空无缝产品的加工方法。传统上,它主要应用于热塑性材料上,近年来,可交联聚乙烯等热固性材料的滚塑也发展很快。由于滚塑并不需要较高的注射压力,较高的剪切速率或精 确的化合物计量器。因此,模聚和机器都比较低廉,而且使用寿命也较长。其主要优点有:机器的性能/价格比较高;复杂的部件的成型不需要后组装;多种产品和多种颜色可以同时成型;模具的花费较低;颜色和材料容易改变;边角料损失少。
Rotational molding, also known as rotational molding, is a processing method for manufacturing hollow seamless products of various sizes and shapes. Traditionally, it is mainly used in thermoplastic materials. In recent years, rotational molding of thermosetting materials such as crosslinkable polyethylene has developed rapidly. Since rotational molding does not require high injection pressure, high shear rate or accurate compound metering. As a result, both the polymer and the machine are relatively cheap and have a long service life. Its main advantages are: the machine performance / price is relatively high; complex parts do not need to be assembled after forming; a variety of products and colors can be formed at the same time; the cost of the mold is low; the color and material are easy to change; the loss of leftovers is small.
              山东模具
基本加工过程很简单,将粉末状或液状聚合物放在模具里,加热同时围绕两个垂直轴旋转,然后冷却。在加热阶段的初,如果用的是粉末状材料,将模具表面形成多孔层,然后随循环过程渐渐熔融,形成均匀厚度的均相层,如果用的是液体材料,则先流动和涂覆在模具表面,当达到凝胶点时则完全停止流动。模具随后转入冷却工区,通过强制通风或喷水冷却,然后被放置于工作区,在这里,模具被打开,完成的制件被取走,接着在进行下一轮循环。
The basic process is very simple. The powder or liquid polymer is placed in a mold, heated and rotated around two vertical axes at the same time, and then cooled. At the beginning of the heating stage, if the powder material is used, a porous layer will be formed on the surface of the mold, and then gradually melt with the circulation process to form a homogeneous thickness homogeneous layer. If the liquid material is used, it will first flow and coat on the mold surface, and when the gel point is reached, the flow will stop completely. The mold is then transferred to the cooling work area, cooled by forced ventilation or water spray, and then placed in the work area, where the mold is opened and the finished parts are removed for the next cycle.
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