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Metal wheel hub injection molding technology

A hub and metal technology, applied in the field of metal hub injection molding technology, can solve problems such as easy cracks, falling off blocks, unstable quality, etc.

Inactive Publication Date: 2017-10-20
HANGZHOU TAICHUANG IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The problem to be solved by the present invention is to provide a metal wheel hub injection molding process to solve the problem of unstable quality of polyurethane wheels in the prior art, and the problems of quality defects such as cracks and peeling off of polyurethane on the adhesion surface with the hub. The technical scheme of the present invention can effectively improve the performance stability of the polyurethane wheel; improve the production efficiency, and effectively prevent the polyurethane from easily producing cracks on the adhesion surface with the wheel hub, the polyurethane layer from easily fluffing, and the technical effects of quality defects such as falling off and peeling off

Method used

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  • Metal wheel hub injection molding technology
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  • Metal wheel hub injection molding technology

Examples

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Effect test

Embodiment 1

[0021] A metal wheel hub injection molding process, including the surface of the metal hub with rubber coating and standing, preheating and baking, mold injection molding, vulcanization and demoulding and secondary vulcanization, firstly apply adhesive glue on the surface of the metal hub and then let it stand, the adhesive glue The coating thickness of the glue is 25 μm to 45 μm, the temperature of the static condition is 35 ° C, the humidity is 55%, and the static time is 40 min to 60 min. Place the rubberized metal hub after standing in an oven at 100°C and bake for 4 to 6 hours, evenly apply a release agent on the inner surface of the injection mold, and heat and keep the injection mold to make the mold temperature 90°C to 110°C. After defoaming the heated prepolymer polyurethane raw material for 20 to 40 minutes, assemble the metal hub in a mold with a temperature of 90°C to 110°C for pouring. The temperature of the pouring raw material is 70°C to 85°C, and the pouring pre...

Embodiment 2

[0023] A metal wheel hub injection molding process, including the surface of the metal hub with rubber coating and standing, preheating and baking, mold injection molding, vulcanization and demoulding and secondary vulcanization, firstly apply adhesive glue on the surface of the metal hub and then let it stand, the adhesive glue The coating thickness of the glue is 25 μm to 45 μm, the temperature of the standing conditions is 30°C, the humidity is 50%, and the standing time is 40min to 60min. Place the rubber-coated metal hub after standing in an oven at 100°C and bake for 6 hours, apply a release agent evenly on the inner surface of the injection mold, and heat and keep the injection mold to make the mold temperature 100°C. After defoaming the heated prepolymer polyurethane raw material for 20 to 40 minutes, assemble the metal hub in a mold with a temperature of 90°C to 110°C for pouring. The temperature of the pouring raw material is 70°C to 85°C, and the pouring pressure of ...

Embodiment 3

[0025] A metal wheel hub injection molding process, including the surface of the metal hub with rubber coating and standing, preheating and baking, mold injection molding, vulcanization and demoulding and secondary vulcanization, firstly apply adhesive glue on the surface of the metal hub and then let it stand, the adhesive glue The thickness of the glue is 25 μm to 30 μm, the temperature of the standing conditions is 28°C, the humidity is 45%, and the standing time is 40minmin. Place the rubber-coated metal hub after standing in an oven at 100°C and bake for 6 hours, apply a release agent evenly on the inner surface of the injection mold, and heat and keep the injection mold to make the mold temperature 100°C. After defoaming the heated prepolymer polyurethane raw material for 20 hours, assemble the metal hub in a mold with a temperature of 90°C for pouring operation. The temperature of the pouring raw material is 70°C, and the pouring pressure of the raw material is 3.2MPa; ...

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Abstract

The invention relates to the field of wheel manufacturing, and discloses a metal wheel hub injection molding technology. The metal wheel hub injection molding technology comprises the following steps of: carrying out rubber coating on the surface of a metal wheel hub, keeping the metal wheel hub still, preheating, roasting, carrying out injection molding by using a mold, carrying out vulcanization mold release and carrying out secondary vulcanization. Good technical effects are achieved by technological parameters such as specific temperature, time and pressure through correlative creative technological design of all working procedures. The metal wheel hub injection molding technology has the technical advantages of reasonable technological parameters, simple actual operation, stable product quality and high production efficiency and solves the problems that polyurethane wheels in the prior art have unstable quality, polyurethane on the surface of adherence of a wheel hub easily cracks, falls off, drops in blocks, strips and the like.

Description

technical field [0001] The invention belongs to the field of wheel manufacturing and discloses a metal wheel hub injection molding process. Background technique [0002] Compared with ordinary rubber tires, polyurethane wheels have the advantages of long service life, high temperature resistance, no odor, better wear resistance and tear resistance, and are less prone to tread peeling, so they are often used in indoor vehicles such as forklifts and factories. . A common production process of polyurethane wheels can be simplified and described as coating the outer surface of the hub with an adhesive, then injecting polyurethane material to form a tightly integrated polyurethane wheel. In the actual production process, the surface treatment process, surface quality, selection of adhesives, selection of injection molding polyurethane materials, and selection of injection molding process conditions will all affect the quality of polyurethane wheels. [0003] The process of inje...

Claims

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Application Information

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IPC IPC(8): B29C45/14B29C45/73B29C45/78B29C45/77B29C35/02C08G18/32C08K3/36B29L30/00B29L31/30
CPCB29C45/1459B29C35/02B29C45/73B29C45/77B29C45/78B29C2045/14868B29C2945/76498B29C2945/76531B29C2945/76732B29L2030/00B29L2031/3002C08G18/3215C08G18/3893C08K3/36
Inventor 李军杨爱林
Owner HANGZHOU TAICHUANG IND
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