| 压缩成型俗称压制成型，是最早成型塑件的方法之一 |
| 添加时间：2019/12/13 15:36:52 浏览次数： |
| 压缩成型俗称压制成型，是最早成型塑件的方法之一。 压缩成型是将塑料直接加入到具有一定温度的敞开的模具型腔内，然后闭合模具，在热与压力作用下塑料熔融变成流动状态。由于物理及化学作用，而使塑料硬化成为具有一定形状和尺寸的常温保持不变的塑件。 压缩成型主要是用于成型热固性塑料，如酚醛模塑粉、脲醛与三聚氰胺甲醛模塑粉、玻璃纤维增强酚醛塑料、环氧树脂、DAP树脂、有机硅树脂、聚酰亚胺等的模塑料，还可以成型加工不饱和聚酯料团（DMC）、片状模塑料（SMC）、预制整体模塑料（BMC）等。 一般情况下，常常按压缩膜上、下模的配合结构，将压缩模分为溢料式、不溢料式、半溢料式三类。 Compression molding, commonly known as compression molding, is one of the earliest methods of forming plastic parts. Compression molding is to add plastic directly into the open mold cavity with a certain temperature, and then close the mold, under the action of heat and pressure, the plastic melts into a flow state. Due to the physical and chemical effects, the plastic hardens into a plastic part with a certain shape and size at room temperature. Compression molding is mainly used for molding thermosetting plastics, such as phenolic molding powder, urea formaldehyde and melamine formaldehyde molding powder, glass fiber reinforced phenolic plastic, epoxy resin, DAP resin, silicone resin, polyimide, etc., and also for molding and processing unsaturated polyester pellets (DMC), sheet molding plastics (SMC), preformed monolithic molding plastics (BMC), etc. Generally, according to the matching structure of the upper and lower die of the compression film, the compression die is divided into three types: overflow type, non overflow type and semi overflow type. |
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