空压机作为压缩空气的动力源，被广泛的运用在国民经济中。有小型活塞式空压机，医用静音无油空压机，一体集成的一体式空压机，无油无水的螺杆式空压机，这个要根据行业需要的压缩气体的要求来选择。注塑机配套用空压机，一般选择的是螺杆式空压机。
Air compressor, as the power source of compressed air, is widely used in the national economy. There are small piston type air compressor, medical mute oil free air compressor, integrated integrated air compressor, oil free and non water screw type air compressor, this should be selected according to the requirements of the compressed gas required by the industry. The air compressor used in the injection molding machine is usually made of screw air compressor.
注塑行业是国民经济中占据比较大的行业，如玩具模具、鞋类模具、容器模具、塑木模具、管胚模具、航空模具、滚塑模具、服饰模具、汽摩模具、农具模具等等，这些行业，都需要运用到空压机。
Injection industry is a relatively large industry in the national economy, such as toy molds, footwear molds, container molds, plastic moulds, tube moulds, aeronautical moulds, rolling molds, clothing moulds, molds and molds, etc. all these industries need to be applied to air compressor.
空气占有一定的空间，但它没有固定的形状和体积。在对密闭的容器中的空气施加压力时，空气的体积就被压缩，使内部压强增大。当外力撤消时，空气在内部压强的作用下，又会恢复到原来的体积。如果在容器中有一个可以活动的物体，当空气恢复原来的体积时，该物体将被容器内空气的压力向外推弹出来。这一原理被广泛应用在生产、生活中。
Air occupies a certain space, but it has no fixed shape and volume. When pressure is applied to the air in a closed container, the volume of the air is compressed, increasing the internal pressure. When the external force is removed, the air will return to its original volume under the action of internal pressure. If there is a moving object in the container, when the air returns to its original volume, the object will be pushed out by the pressure of the air in the container. This principle is widely used in production and life.
在注塑工艺中，还有一个技术也是能够让压缩空气的作用非常重要。那就是气体辅助注塑成型技术。基本上所有用于注塑的热塑性塑料及一般的工程材料(如PS、HIPS、PP、ABS…)都适用于气辅技术。目前气辅技术广泛应用于各类塑胶产品上，例如：电视机、电冰箱、空调或音响外壳、汽车塑料产品、家电、日用品、玩具等。
In the injection molding process, there is another technology that is able to make the role of compressed air very important. That's the gas - assisted injection molding technology. Basically all thermoplastic materials used for injection molding and general engineering materials (such as PS, HIPS, PP, ABS... It is applicable to gas assisted technology. At present, gas assisted technology is widely used in various kinds of plastic products, such as TV, refrigerator, air conditioning or sound shell, automobile plastic products, household appliances, daily necessities, toys and so on.
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