Detailed introduction

02

2021

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11

Manufacturing method of more durable flat double barrel


Generally speaking,Flat double barrelIt is an indispensable part of the plastic molding injection molding machine and can be said to be the heart of injection molding. Generally, the double hole structure of the inner insert is used to ensure the quality and efficiency of injection molding. However, the service life of the existing double-hole structure is not very long, and it cannot meet the needs of users.

  


In order to solve the above technical problems, technicians provide a new type of flat double barrel with long service life and meeting the requirements of centrifugal casting. It is realized through the following technical scheme: a new type of flat double cylinder, including a mother body and an injection molded body. The injection molded body is spliced into a double-hole "horizontal 8-shaped" structure by two cylinders. The mother body is a cylinder structure with two ends open. The centrifugal casting cylinder is embedded in the mother body. The centrifugal casting cylinder is a cylinder structure with two ends open. The outer diameter of the centrifugal casting cylinder is equal to the inner diameter of the mother body. A centrifugal casting cylinder is embedded in the outer ring of the injection molding machine and the inner ring of the parent body, so that the flat double cylinder can meet the centrifugal casting and extend the service life. Flat double barrel

In the production of the flat double barrel, attention should be paid to: the outer wall of the barrel is axially spaced with connecting screw holes. There are two exhaust through holes at the bottom of the exhaust chamber, and the two exhaust through holes are symmetrically arranged. The bottom surface of the exhaust groove between the two exhaust through holes is provided with four positioning screw holes, and the side wall of the cylinder close to one end of the cylinder is provided with a feeding groove. The bottom surface of the feed chute is a plane that can be seamlessly connected with the conveying pipeline. The inlet of the cylinder is located in the middle of the plane. A second positioning groove is provided on the side wall of the cylinder body opposite to the feed opening. The injection molded body is a "horizontal 8-shaped" structure of double-hole alloy splicing. The outer diameter of the mother body is 270mm and the inner diameter is 130mm. The centrifugal casting cylinder is made of alloy, and the connecting end is flange. Flat double barrel

Compared with the prior art, the new type of flat double barrel has the following advantages: First, by optimizing the structure, the extruder barrel can be used in conjunction with the flat double screw, which not only saves materials, but also ensures the strength of the barrel, and cooperates with the flat double The screw fully processes the material; at the same time, the nitride layer on the inner wall of the barrel can enhance the wear resistance and corrosion resistance of the inner wall, and extend the service life of the barrel. The second is that the flat twin screw matching the barrel is provided with a reflux tank, which accelerates the reflux of the material in the melting section, not only makes the material mixed evenly, but also makes the heat exchange of the material more complete, thus achieving the heat balance of the material, avoiding local pressure imbalance, and is conducive to the normal use of extrusion combination. Third, in the centrifugal casting process of alloy powder, super hard powder such as tungsten is added accordingly, the produced alloy layer achieves more wear-resistant and corrosion-resistant effects; in addition, because the centrifugal casting cylinder is embedded in the outer ring of the injection molding machine and the inner ring of the parent body, the flat barrel and the double barrel can meet the centrifugal casting and extend The service life of the barrel.