Detailed introduction

31

2023

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01

What is the function of the alloy screw?


  alloy screwWhat is the function?

  

合金螺杆


Bimetallic screw is the core component of plastic molding equipment and is a part of heating extrusion plasticization. With the rapid development of the chemical industry, a variety of new plastic materials continue to emerge, and more and more alloy screws are used. The main materials suitable for alloy screw are almost all kinds of added glass fiber, ABS fire prevention, bak powder, magnetic powder, plastics and special engineering plastics, such as PPA, PO, PPS, LCP, PC, etc. The alloy screw has good wear resistance, corrosion resistance, low production cost and adjustable length. When the alloy screw rotates, the contact surface between the spiral spiral shell and the feed tube is nickel-based alloy powder. Due to the high hardness of nickel-based alloy powder, the spiral shell is not easy to wear, effectively improvingalloy screwThe service life of the bimetal screw reduces the cost of use.

The alloy screw mainly includes nuts and screw body parts. The surfaces of the screw body and screw ribs are coated with cobalt and tungsten carbide composite powder coating, which makes the screw have good wear resistance and corrosion resistance, and prolongs the service life of the screw; The inside is hollow, which reduces the cost. There are transverse stiffeners inside to ensure that the screw has sufficient strength during work. Flat twin-screw extruder, also known as parallel twin-screw extrusion, is a kind of equipment used for large-scale production and scientific research and development experiments. It has a wide range of uses and can process various materials. But it has many kinds. Today, I will introduce you to the working principle of the parallel twin-screw extruder and its aspect ratio. I wish I could give you some help. Twin-screw extruder is developed on the basis of single-screw extruder. Because of its good feeding performance, mixing plasticizing performance, exhaust performance, extrusion stability and other characteristics, it has been widely used in the molding of extruded products. Extrusion molding is a process in which plastic rubber is continuously pressed out through a mold under certain conditions to make it a product with a certain cross-sectional shape.

The system structure of the flat double extruder varies according to the field of application and operating characteristics. According to the direction of rotation, it can be divided into reverse rotation and co-rotation. According to the form of meshing, it can be divided into meshing type and non-meshing type. The engagement type can also be classified into a full engagement type and a partial engagement type. Flat twin extruders are widely used due to their many advantages. For example, it is easy to open, so the degree of wear of the threaded element and the inner sleeve can be found at any time for effective maintenance or replacement. When there is a problem with the extruded product, causing unnecessary waste, the problem will not be found.

In the process of equipment maintenance, the heating and cooling system of the ordinary flat double extruder is usually removed first, and then the screw is pulled out as a whole. There is no need to use an open twin screw. Just loosen a few bolts, turn the worm gear box handle device to lift the upper part of the tube, and then open the entire tube for maintenance. This not only shortens the maintenance time, but also reduces the labor intensity.