Detailed introduction

04

2020

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11

What are the methods to improve the performance of injection molding machine barrel screw?


Each plastic has an ideal plasticizing processing temperature range, and the barrel processing temperature should be controlled to be close to this temperature range. When the granular plastic enters the barrel from the hopper, it will first reach the feed section, where dry friction inevitably occurs. When these plastics are insufficiently heated and unevenly melted, it is easy to cause the inner wall of the cylinder andInjection molding machine barrel screwMore surface wear. Similarly, in the compression section and the homogenization section, if the molten state of the plastic is disordered, the wear will increase. So...Injection molding machine barrel screwWhat are the performance improvement methods?

 

Injection molding machine barrel screwPerformance improvement methods:

1,The speed should be adjusted appropriately. Some plastics are supplemented with reinforcing agents such as glass fibers, minerals or other fillers. Compared with molten plastics, these materials have a significant impact onInjection molding machine barrel screwThe friction is often greater. When molding these plastics, if they are manufactured at high rotation speeds, the shear force on the plastic will increase, and the reinforcement material will correspondingly produce more fibers. Chopped fiber contains sharp ends and frayed. Strength is increasing,When inorganic minerals inInjection molding machine barrel screwWhen sliding at high speed on the surface, the scraping effect is not small. Therefore,Injection molding machine barrel screwThe speed should not be set too high.

 

2,Remove debris from the plastic. Generally speaking,NewPurchased plastic without sundries, but in transport,Weighing,Drying,Color mixing, especially after adding recycled materials, may be mixed with impurities. Small as metal scrap, heating ring nut paper clip as big as, has occurred into the barrel, rightInjection molding machine barrel screwThe damage is self-evident (the cylinder will also be damaged at the same time), therefore, the magnet holder must be installed to strictly manage and monitor the material.

 

3RemovalMoisture,The effect of moisture contained in plastics onInjection molding machine barrel screwThe wear of the surface has a certain effect. If the plastic is not completely removed from the water before injection, the residual water entersInjection molding machine barrel screwof the compressed part and forms the high pressure of the melt in the molten plastic"steam particles", andInjection molding machine barrel screwMoving forward together. FromInjection molding machine barrel screwto the thread head, these"Steam particles" are released and expanded during the injection process, just like fine impurities of hard particles, which will cause friction damage to the wall surface.