The mechanical principle of injection molding machine
the mechanical structure of injection molding machine is mainly divided into injection part and mold locking part.
The function of the injection part is to melt the plastic and inject it into the mold cavity, and the function of the mold locking part is to control various actions such as mold opening and closing and product ejection.
The action procedure of the plastic machine: nozzle marching → injection → pressure maintaining → Pre-molding → retraction → nozzle retraction → cooling → mold opening → ejection → needle withdrawal → door opening → mold closing → nozzle marching.
1. There are two main forms of injection part r: piston type and reciprocating screw type.
At present, piston injection molding machines are rare and will not be introduced here.
The reciprocating screw injection molding machine rotates the screw in the heating barrel to transfer the solid plastic particles (Or powder)
Melt and mix, squeeze into the cavity at the front end of the barrel, then the screw moves forward along the axial direction, and inject the plastic melt in the cavity into the mold cavity.
During plasticization, the plastic is pushed by the screw edge, compacted in the screw groove, and bears the heat transmitted by the barrel wall. In addition, the plastic and plastic, the plastic and the barrel and the screw surface conflict to generate heat, the temperature gradually rises to the melting temperature.
The melted plastic is stirred by the screw shaft for further mixing, and enters the front of the barrel along the screw groove and pushes the screw to retreat.
The injection part is mainly related to plasticization: screw, barrel, shunt shuttle, check ring, injection nozzle, flange, feeding Hopper, etc.
The following is an explanation of its role and influence in the plasticizing process. (1)
Screw screw is an important part of injection molding machine.
Its function is to transport, compact, melt, stir and pressure plastic.
All this is done by the rotation of the screw in the barrel.
When the screw rotates, the plastic will conflict and move with each other on the inner wall of the barrel, the bottom surface of the screw groove, the screw edge pushing surface and the plastic and plastic.
The forward push of plastic is the result of this combination of sports, and the heat generated by the conflict is also absorbed to improve the plastic temperature and melt the plastic.
The structure of the screw will directly affect the degree of these effects.
Ordinary injection screw structure also has improved plasticizing quality.
The injection molding machine is just a cooling and pressure to put the molten plastic raw material into the mold cavity. Different products can only be produced by different molds, according to the size of the product, injection molding machines with different tonnage are freely selected. However, the power consumption of traditional injection molding machines is very large. All-electric injection molding machines have high precision, but the price is very expensive, if the traditional injection molding machine wants to save energy and save electricity and improve the precision, it can freely choose to make the controller of the injection molding machine to save energy. The controller's energy saving reconstruction has become an industry trend of the injection molding machine's energy saving reconstruction, as a professional manufacturer of energy-saving reconstruction of injection molding machine controllers, Laizhou Xinian company has successfully reconstructed nearly 50% cases with an average energy-saving rate of more than. It is free to test the machine and make plans, after-sales free after-sales service for two years, use the effect to say, if you have other doubts, you can Baidu 'Lai Zhou Xi Nian controller saves energy' that has their official website. Can do a detailed understanding.
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