Year1
- 电机：
- 132
- 规格：
- M110/JZD150
The structure and application of the double-wave screw of the carpet sheet extruder
The structural feature of the double-wave screw is that a parallel auxiliary spiral is added to the groove of the single-wave screw, and the pitch is equal. The rib is lower than the main rib, and the crest of one flute corresponds to the trough of the other flute. During the plasticizing process, not only the materials on the main and auxiliary screws are sheared periodically, but also the materials on the main and auxiliary screws can be continuously merged, which is conducive to homogenization. Therefore, compared with other screws, it can not only improve the plasticizing capacity , and can increase the mixing effect. It is suitable for injection molding of fillers, pigments and foamed materials to obtain uniform components. It is also suitable for heat-sensitive raw materials to reduce degradation. This type of screw requires relatively high processing accuracy and is difficult to process, so it is used relatively rarely.
How to increase the flow rate during injection molding? There are two ways to increase the flow rate during injection molding. If you are making a low-grade product, you can directly add wax and fill the masterbatch. Filling the masterbatch can increase the fluidity. If the quantity is large, the quality better. A certain amount of brightener needs to be added. In order to ensure the health and safety of plastic workers, plastic products must not only use various plastic polymers as raw materials, but also add various ingredients, such as pigments. Gas-generating agent and stabilizer that retards ignition. Can't wait for thousands of chemicals. When transporting and using these chemicals, a large amount of chemical powder vapor may be generated, as well as smoke and decomposition products released when the plastic is decomposed by heat. In the case of long-term inhalation of large amounts, it may invisibly damage the health of workers. These substances present in the air of the workplace are difficult to detect unless they are analyzed by scientific instruments.
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