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模具加工?中的滾塑是什么?

來源:http://www.gvyuft.buzz     發布時間:2020-11-04 15:30:44    點擊:

模具加工中滾塑又稱旋轉模塑是一種用于制造各種尺寸和形狀的中空無縫產品的加工方法。傳統上,它主要應用于熱塑性材料上,近年來,可交聯聚乙烯等熱固性材料的滾塑也發展很快。由于滾塑并不需要較高的注射壓力,較高的剪切速率或精 確的化合物計量器。因此,模聚和機器都比較低廉,而且使用壽命也較長。其主要優點有:機器的性能/價格比較高;復雜的部件的成型不需要后組裝;多種產品和多種顏色可以同時成型;模具的花費較低;顏色和材料容易改變;邊角料損失少。
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.
              山東模具
基本加工過程很簡單,將粉末狀或液狀聚合物放在模具里,加熱同時圍繞兩個垂直軸旋轉,然后冷卻。在加熱階段的初,如果用的是粉末狀材料,將模具表面形成多孔層,然后隨循環過程漸漸熔融,形成均勻厚度的均相層,如果用的是液體材料,則先流動和涂覆在模具表面,當達到凝膠點時則完全停止流動。模具隨后轉入冷卻工區,通過強制通風或噴水冷卻,然后被放置于工作區,在這里,模具被打開,完成的制件被取走,接著在進行下一輪循環。
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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