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Manufacturing method for plastic molding machine cylinder

A manufacturing method and molding machine technology, applied in the field of extruder barrel manufacturing and plastic molding machine barrel manufacturing, can solve problems such as barrel corrosion or wear, screw and barrel corrosion and wear, and achieve excellent wear resistance The effect of loss and excellent comprehensive mechanical properties

Active Publication Date: 2017-05-31
KUNSHAN SERGEANT EQUIP IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The extrusion or injection molding process of high-temperature high-flame-retardant plastics, high-fiber plastics, and high-precision molding plastics will cause serious corrosion and wear to the screw and barrel. The barrel manufactured by the above method is difficult to meet the molding processing of these plastics. requirements, causing the barrel to be corroded or worn quickly, forcing the extruder and injection molding machine to stop production and replace the barrel

Method used

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  • Manufacturing method for plastic molding machine cylinder

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] according to figure 1 The structure shown makes the barrel. The material of the steel barrel is 42CrMoA, and its alloy composition is 0.37-0.44% of C, 0.17-0.37% of Si, 0.50-0.80% of Mn, 0.80-1.10% of Cr and the balance of Fe according to the mass percentage. . The hot isostatic pressing sintered alloy powder is a cobalt-based tungsten carbide alloy, wherein the mass content of WC is 68%; according to the mass percentage content, the cobalt-based tungsten carbide alloy binder phase composition is 29.50% Cr, 7.40% Mo and other amount of Co; the hot isostatic pressing sintering is carried out under the vacuum of the air in the sleeve, the hot isostatic pressing sintering temperature is 1050-1150 °C, the ambient gas is argon, and its pressure is 160Mpa.

Embodiment 2

[0026] according to figure 1 The structure shown makes the barrel. The steel barrel material is 40Cr, and its alloy composition is 0.38-0.45% C, 0.17-0.37% Si, 0.50-0.80% Mn, 0.90-1.20% Cr, 0.15-0.25% Mo and the balance of Fe. The tungsten carbide alloy powder material is NiMoCrFeCo-WC alloy powder, wherein the mass content of WC is 72%; according to the mass percentage content, the composition of NiMoCrFeCo is 28.0% Cr, 1.2% Fe, 15% Mo, 4.5% Co , 0.02% of C, 0.03% of Mn, 0.06% of Si, 0.03% of Al, 2.0% of W, 0.5% of V and the rest of Ni, the hot isostatic pressing sintering is carried out under the air in the jacket , Hot isostatic pressing sintering temperature 1150 ~ 1250 ℃, the ambient gas is argon, and its pressure is 145Mpa.

Embodiment 3

[0028] according to figure 1 The structure shown makes the barrel. The material of the steel barrel is 42CrMoA, and its alloy composition is 0.37-0.44% of C, 0.17-0.37% of Si, 0.50-0.80% of Mn, 0.80-1.10% of Cr and the balance of Fe according to the mass percentage. . The hot isostatic pressing sintered alloy powder is a cobalt-based tungsten carbide alloy, wherein the mass content of WC is 50%; according to the mass percentage content, the cobalt-based tungsten carbide alloy binder phase composition is 34.50% Cr and the balance Co; The isostatic sintering is carried out under the condition that the air in the sleeve is removed, the hot isostatic sintering temperature is 1050-1150°C, the ambient gas is argon, and the pressure is 160Mpa.

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Abstract

The invention provides a manufacturing method for a plastic molding machine cylinder. A layer of metal-base carbon tungsten alloy with the thickness ranging from 1 mm to 10 mm is evenly distributed on the inner wall of a steel pipe through a hot isostatic pressure sintering method, and a steel pipe base material and the carbon tungsten alloy are metallurgical bonding. By means of the hot isostatic pressure sintering machine cylinder manufacturing process method, the design idea that a mechanical part is made of two kinds of materials is achieved, the steel-base machine cylinder has excellent comprehensive mechanical performance, and the metal-base tungsten carbide surface layer has especially excellent abrasion resistant and corrosion resistant performance which is a characteristic cannot be achieved by any single material.

Description

technical field [0001] The invention belongs to the manufacturing technology and application field of high-performance basic parts, and specifically relates to a method for manufacturing plastic molding machine barrels, which are mainly used for injection molding machines with high wear resistance and high corrosion resistance, and extruder barrels (barrels) ) manufacturing etc. Background technique [0002] The barrel, also known as the barrel, and the screw are the most critical parts of the injection molding machine and the extruder. The traditional barrel manufacturing methods include electrochrome plating or electroless nickel plating on the inner wall of medium carbon alloy steel, and centrifugal casting of iron base or nickel on the inner wall of medium carbon steel. Based on self-fluxing alloy, high-carbon high-alloy steel is integrally manufactured. Glycon company adds bushings to the parts of the barrel that are easy to wear, and replaces the bushes in time after w...

Claims

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Application Information

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IPC IPC(8): B22F3/15C22C29/08C22C30/00C22C19/07C22C19/05C22C27/06B29C47/08
CPCB22F3/15B29C48/6803C22C19/055C22C19/056C22C19/058C22C19/07C22C27/06C22C29/005C22C29/08C22C30/00
Inventor 沈承金闫士良陈正陶庆姚叶
Owner KUNSHAN SERGEANT EQUIP IND
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