Preparation method of wear-resistant coating on inner wall of cylinder of twin-screw extruder

A twin-screw extrusion and wear-resistant coating technology, applied in the field of plastic machinery manufacturing, can solve problems such as residual plastic at seams, and achieve the effects of easy operation, low cost of preparation process and good toughness

Inactive Publication Date: 2018-11-16
HEBEI COLLEGE OF IND & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that the existing twin-screw extruder separate composite alloy barrel has plastic remaining at the seam, the invention provides a method for preparing a wear-resistant coating on the inner wall of the twin-screw extruder barrel

Method used

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  • Preparation method of wear-resistant coating on inner wall of cylinder of twin-screw extruder
  • Preparation method of wear-resistant coating on inner wall of cylinder of twin-screw extruder
  • Preparation method of wear-resistant coating on inner wall of cylinder of twin-screw extruder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A method for preparing a wear-resistant coating on the inner wall of a twin-screw extruder barrel:

[0044] Step 1. Use a double-hole steel cylinder as the barrel jacket 8 of the twin-screw extruder. The outer diameter of the double holes is 70mm, and the wall thickness is 10mm. The inner wall of the barrel jacket 8 is derusted and degreased, and the center distance between the two holes is measured. ;

[0045] Step 2, take a steel plate 15 with a thickness of 10mm, take two steel pipes 9 with an outer diameter of 42mm, and have a wall thickness of 2mm, and seamlessly weld the bottoms of the two steel pipes 9 on the steel plate 15, so that the distance between the centers of the two steel pipes 9 is equal to the above-mentioned The center-to-center distance of the cylinder jacket 8 double holes;

[0046] Step 3, nesting the two steel pipes 9 in the cylinder jacket 8, and seamlessly welding the bottom of the cylinder jacket 8 on the steel plate 15, so that the two steel...

Embodiment 2

[0053] A method for preparing a wear-resistant coating on the inner wall of a twin-screw extruder barrel:

[0054] Step 1. Adopt a double-hole steel cylinder as the casing 8 of the twin-screw extruder. The outer diameter of the double holes is 90mm and the wall thickness is 15mm. The inner wall of the casing 8 is derusted and degreased, and the center distance between the two holes is measured. ;

[0055] Step 2, take a steel plate 15 with a thickness of 10mm, take two steel pipes 9 with an outer diameter of 50mm, and have a wall thickness of 3mm, and seamlessly weld the bottoms of the two steel pipes 9 on the steel plate 15, so that the distance between the centers of the two steel pipes 9 is equal to the above-mentioned The center-to-center distance of the cylinder jacket 8 double holes;

[0056] Step 3, nesting the two steel pipes 9 in the cylinder jacket 8, and seamlessly welding the bottom of the cylinder jacket 8 on the steel plate 15, so that the two steel pipes 9 are ...

Embodiment 3

[0062] A method for preparing a wear-resistant coating on the inner wall of a twin-screw extruder barrel:

[0063] Step 1. Use a double-hole steel cylinder as the barrel jacket 8 of the twin-screw extruder. The outer diameter of the double holes is 110 mm, and the wall thickness is 20 mm. The inner wall of the barrel jacket 8 is derusted and degreased, and the center distance between the two holes is measured. ;

[0064] Step 2, take a steel plate 15 with a thickness of 10mm, take two steel pipes 9 with an outer diameter of 56mm, and have a wall thickness of 4mm, and seamlessly weld the bottoms of the two steel pipes 9 on the steel plate 15, so that the distance between the centers of the two steel pipes 9 is equal to the above-mentioned The center-to-center distance of the cylinder jacket 8 double holes;

[0065] Step 3, nesting the two steel pipes 9 in the cylinder jacket 8, and seamlessly welding the bottom of the cylinder jacket 8 on the steel plate 15, so that the two st...

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Abstract

The invention provides a preparation method of a wear-resistant coating on the inner wall of the cylinder of a twin-screw extruder. The preparation method comprises the following steps: a steel tube with a double-circular-hole structure is adopted as a cylinder jacket, two steel tubes as core tubes are arranged in the cylinder jacket, an induction coil is adopted to heat powder for the coating, pressurization is carried out while heating the powder for the coating, and the wear-resistant coating is prepared on the inner wall of the steel tube. Through the preparation method of the wear-resistant coating on the inner wall of the cylinder of the twin-screw extruder, the integral cylinder with the wear-resistant coating is obtained, and the strength of the cylinder jacket and the wear-resisting property of the coating are better than the strength of the cylinder prepared through common sintering and provided with the wear-resistant coating, so that the problem that plastic is remnant at the seam when a double C-shaped cylinder is cut and welded commonly is solved, abrasion generated when a screw rod and plastic rotate at a high speed is greatly reduced, and the service life of the cylinder is prolonged; and in addition, the preparation technology is low in cost and easy to operate and can realize industrialization easily.

Description

technical field [0001] The invention relates to the technical field of plastic machinery manufacturing, in particular to a method for preparing a wear-resistant coating on the inner wall of a twin-screw extruder barrel. Background technique [0002] Plastic extruder is widely used equipment in the plastic processing industry, used to extrude thermoplastics such as soft and hard polyvinyl chloride and polyethylene. The plastic is heated into a molten state in the barrel of the extruder, and the dissolved plastic is extruded forward under the high-speed rotation of the screw rod, and the plastic is extruded into various continuous shapes through the machine head and molds of different shapes. of plastic products. [0003] At present, most of the inner liners of the barrel of the twin-screw extruder are separate composite alloy inner liners, which cut a part of the O-shaped carbon steel pipe longitudinally by wire cutting to form a C-shaped steel pipe, and then two sections of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C47/08B29C47/40
Inventor 石永亮戚翠芬李爽梁海军刘燕霞时彦林付菁媛刘丹陈涛李秀敏赵晓萍张欣杰
Owner HEBEI COLLEGE OF IND & TECH
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