Detailed introduction

18

2022

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06

Brief Introduction of Cooling Process in the Process of Alloy Screw


  alloy screwIt is made of alloy steel or chromium-molybdenum alloy steel with excellent product materials, refined through tempering, shaping, molding, fine grinding, surface nitriding or spraying alloy (bimetal), grinding and other processes. It has the advantages of high wear resistance and corrosion resistance and is suitable for adding glass fiber, plastic and special engineering plastics such as PPA, PO, PPS, LCP, ABS fire prevention, wood powder, magnetic powder, PC, etc, it can also be used for plastic molding equipment such as plastic profile extruders and injection molding machines. With the progress of production technology, the performance of alloy screws is becoming more and more perfect. Then, let's learn about the simple introduction of the cooling process in the processing of alloy screws!

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Cooling process in alloy screw processing:

  alloy screwThe cooling and cooling of the homogenization section is due to the large extrusion, friction and shearing effect of the melt in this section, which generates more heat and the temperature rises rapidly. In order to prevent the material from decomposing, it needs to be cooled. The alloy screw needs to be cooled when extruding materials, mainly to ensure smooth production. Prevent material decomposition caused by excessive plasticizing temperature. For example, in the alloy screw feed section cooling, in order to prevent the section of the screw temperature is too high, high temperature lead to screw thread groove attached to the material with the rotation of the screw and rotation, affect the material conveying forward, due to insufficient supply and can not be normal production.

With the expansion of electrification and mechanization, the screw is gradually widely used. The screw needs high strength, high rotation and high temperature friction with the workpiece during operation, so the wear of the screw is severe, and the hardness of the screw is uneven. Therefore, if the workpiece with high hardness is encountered during the entry, the loss of the screw becomes larger.

In the prior art, the alloy screw is mainly improved by the following methods, mainly by uniformly coating the outer surface of the screw with nickel-based alloy or tungsten carbide composite powder coating to improve the wear resistance and high temperature wear resistance of the screw. The structure has been partially improved, but there is no mention of how to improve the hardness of the screw and how to prevent the coating from falling off at high temperature. The above problems still exist and have not been solved perfectly.

The method of cooling and cooling alloy screw is to pass water or oil in the screw with axial hole to cool down as heat conduction medium. The heat transfer medium must be controlled at a constant temperature and pass through the homogenization part of the alloy screw. The alloy screw that rotates during work must be connected with a special pipe and a pipe that conveys the heat transfer medium. This special connection is called a rotary joint.

  alloy screwBy setting the flying knife, the ability to enter the workpiece is enhanced, and the edge is broken at the same time. The grinding sheet makes the broken fragments flow to both sides of the edge, and the particleboard is used to discharge the fragments. The main shaft set between the flying knife is made of hard alloy, cloak nickel-based alloy and tungsten carbide composite powder coating for high-strength composite, which has high strength and can effectively enter. The screw body is protected by the protruding structure, and the screw body can be prevented from further wear. Secondly, the sliding plate and the guide plate arranged at the front end of the screw can further break the fragments and discharge them quickly, so as to prevent excessive fragments from accumulating inside and becoming friction and generating more heat. The liquid inlet channel arranged inside the screw body is cooled by liquid when entering ultra-high temperature, prevent the drill bit and drill bit from falling off due to too high isothermal temperature.

The above introduction is a brief introduction of the cooling process in the process of alloy screw processing. If you need to know more, please feel free to contact us!