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News Center

Zhejiang Guangming Plastics Machinery Co., Ltd.

02

2021-02

Matters needing attention in the processing of alloy screw

Alloy screw, also known as bimetallic screw, its main material is composed of two different metals, the advantage is to use economic processing, to achieve high economic benefits. Alloy screw temperature can not exceed 400 ℃ (including thread). Otherwise, it will reduce the hardness and wear resistance of the screw; clean the alloy screw with a wire brush, and polish the surface of the screw with emery cloth (sand grade 240~280); burn the residual material on the internal thread with flame (left-handed thread), and then carefully clean the thread with a wire brush.

2021-02-02

15

2021-01

Brief Introduction of Cooling Process in the Process of Alloy Screw

The homogenization section of the alloy screw is cooled because the melt in this section generates more heat and the temperature rises faster due to the large extrusion, friction and shear effects. In order to prevent the material from decomposing, it needs to be cooled. When extruding materials, it is necessary to cool the alloy screw, mainly to ensure the smooth production and prevent the material from decomposing due to the high plasticizing temperature.

2021-01-15

30

2020-12

Common structure classification of rubber screw

The normal cooperation between the rubber screw and the barrel ensures the continuous extrusion of the extruder for the production of raw materials. The common structural classification of rubber screws can be divided into three forms according to the change of thread lift and groove depth: equidistant deepening screws, equidistant deepening screws are classified according to the change speed of groove depth; Equal depth variable pitch screw means that the depth of the screw groove is unchanged, and the pitch is a rubber screw with a wide gradual change from the beginning of the feeding section to the end of the homogenizing section. The screw with variable depth and variable pitch is a rubber screw whose thread lift gradually narrows from wide to narrow and whose groove depth gradually becomes shallow from deep.

2020-12-30

16

2020-12

What are the fracture maintenance methods of rubber screw?

The fracture of the rubber screw is a damage caused by low cycle fatigue. After the rubber screw is broken, a new screw can be re-manufactured according to the old screw. The wear-resistant alloy can also be thermally sprayed on the surface of the rubber screw, and then polished to improve the corrosion resistance and wear resistance of the screw. In addition, the surface of the rubber screw can also be plated with a layer of hard chromium, chromium this molecule has good corrosion resistance and wear resistance.

2020-12-16

07

2020-11

Comparison and difference between injection molding machine barrel screw and extruder screw

There are many differences between the barrel screw of injection molding machine and the extruder screw. The following is a brief introduction to the comparison and difference between the barrel screw of injection molding machine and the extruder screw. Injection molding machine barrel screw and extruder screw on the processing data are also different, the viscosity of the material is not the same. The barrel screw of the injection molding machine requires that the plastic raw material can flow in the mold, and the extruder screw is generally bent and narrow, so the fluidity of the plastic raw material must be better.

2020-11-07

04

2020-11

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

Injection molding machine barrel screw performance improvement method: When inorganic minerals slide at high speed on the surface of the injection molding machine barrel screw, the scraping effect is not small. Therefore, the injection molding machine barrel screw speed should not be adjusted too high. Remove moisture, the moisture contained in the plastic has a certain impact on the wear of the screw surface of the injection molding machine barrel. The damage of the debris in the plastic to the barrel screw of the injection molding machine is self-evident (the cylinder will also be damaged at the same time). Therefore, a magnet bracket must be installed to strictly manage and monitor the material.

2020-11-04

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