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Manufacture method of car bumper

A technology of automobile bumper and manufacturing method, which is applied in the field of auto parts, can solve the problems of poor impact resistance and sprayability, and achieve good impact resistance and good sprayability

Inactive Publication Date: 2015-05-27
LIUZHOU JULONG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for manufacturing an automobile bumper, which can solve the problems of poor impact resistance and sprayability in existing automobile bumpers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The manufacture method of this automobile bumper comprises the steps:

[0016] A. Weigh the weight of each raw material according to the following parts by weight: 50 parts of polypropylene, 10 parts of toughening agent, 3 parts of methacrylic acid-ethylene copolymer, 1 part of zinc stearate, 10 parts of talcum powder, lubricant 0.1 part, 0.5 part of antioxidant; Wherein, toughening agent is polyolefin elastomer, and lubricant is polyethylene wax;

[0017] B. Preheating mixer, the preheating temperature is 80°C, add methacrylic acid-ethylene copolymer, zinc stearate, talcum powder, polyethylene wax and antioxidant and mix evenly, then add polypropylene and polyolefin Elastomers are thoroughly mixed;

[0018] C. Add the mixed material into the extruder, melt and extrude to granulate, and the extrusion temperature is 180°C;

[0019] D. Dry the granulated material and add it to the injection molding machine. After the injection molding machine is heated and kept under pr...

Embodiment 2

[0022] A. Weigh the weight of each raw material according to the following parts by weight: 72 parts of polypropylene, 18 parts of toughening agent, 4 parts of methacrylic acid-ethylene copolymer, 2 parts of zinc stearate, 15 parts of talcum powder, lubricant 0.4 part, 0.6 part of antioxidant; Wherein, toughening agent is polyolefin elastomer, and lubricant is polyethylene wax;

[0023] B. Preheating mixer, the preheating temperature is 100°C, add methacrylic acid-ethylene copolymer, zinc stearate, talcum powder, polyethylene wax and antioxidant and mix well, then add polypropylene and polyolefin Elastomers are thoroughly mixed;

[0024] C. Add the mixed material into the extruder, melt and extrude to granulate, and the extrusion temperature is 210°C;

[0025] D. Dry the granulated material and add it to the injection molding machine. After the injection molding machine is heated and kept under pressure, the molten material is pushed into the mold. The injection temperature i...

Embodiment 3

[0028] A. Weigh the weight of each raw material according to the following parts by weight: 80 parts of polypropylene, 25 parts of toughening agent, 5 parts of methacrylic acid-ethylene copolymer, 3 parts of zinc stearate, 0 part of talcum powder, lubricant 0.5 part, 1 part of antioxidant; Wherein, toughening agent is polyolefin elastomer, and lubricant is polyethylene wax;

[0029] B. Preheating mixer, the preheating temperature is 80-100°C, add methacrylic acid-ethylene copolymer, zinc stearate, talcum powder, polyethylene wax and antioxidant and mix evenly, then add polypropylene and Polyolefin elastomers are thoroughly mixed;

[0030] C. Add the mixed material into the extruder, melt and extrude to granulate, and the extrusion temperature is 180-220°C;

[0031] D. Dry the granulated material and put it into the injection molding machine. After the injection molding machine is heated and kept under pressure, the molten material is pushed into the mold. The injection temper...

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Abstract

The invention discloses a manufacture method of a car bumper, relating to the technical field of auto spare parts. The method comprises the following steps: A. respectively weighing each raw material according to the weight part; B. preheating a mixing machine at a temperature of 80 to 100 DEG C, uniformly mixing methacrylic acid-vinyl copolymer, zinc stearate, talcum powder, polyethylene wax and antioxidant to obtain a mixture I, and then adequately mixing the mixture I with polypropylene and polyolefin elastomer to obtain a mixture II; C. arranging the mixture II into an extruder, melting, extruding and granulating the mixture II, wherein the extruding temperature is 180 to 220 DEG C; D. drying the granulated material, arranging the granulated material into an injection molding machine, heating the injection molding machine, maintaining the pressure of the injection molding machine, pushing molten materials into a mold, wherein the injection temperature is 190 to 210 DEG C, the injection pressure is 6MPa to 8MPa, the pressure maintaining time is 10s to 15s; cooling the mold for 30 to 60 seconds, opening the mold, and taking out the product. By adopting the manufacture method, the problems that the existing car bumper is poor in impact resistance and poor in painting property can be solved.

Description

technical field [0001] The invention relates to the technical field of auto parts, in particular to a method for manufacturing an auto bumper. Background technique [0002] Automobile bumper is a safety protection device installed on the front and rear of the automobile body. It is mainly used to absorb and slow down external impact, and can protect related components during low-speed collisions. Compared with traditional metal bumpers, plastic bumpers can recover when subjected to low-speed collision impact, so plastic bumpers have replaced metal bumpers. Among many plastic bumpers, bumpers made of polypropylene modified materials have been used. Accounting for about 80%, this modified polypropylene bumper has the advantages of low cost, light weight and recyclability, so it is widely used in the automotive field. However, the impact resistance and sprayability of existing PP automobile bumpers are still poor, and further improvement is needed. Contents of the invention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B9/06B29C45/78B29C45/77B29C45/76C08L23/12C08L23/08C08L23/00C08K13/02C08K5/098C08K3/34
CPCB29C45/77B29C45/76B29C45/78B29C2945/76498B29C2945/76531B29C2945/76561C08L23/12C08L2205/035C08L33/02C08L23/00C08L23/06C08K5/098C08K3/34
Inventor 苏志强谢宇强
Owner LIUZHOU JULONG TECH
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