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Process for overmoulding over a plastic insert and automobile part obtained by this process

An overmolding, motor vehicle technology, used in the field of body parts, manufacturing motor vehicle parts

Active Publication Date: 2017-08-01
CO PLASTIC OMNIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] These mechanically or chemically fixed connections are often weak points of composite components, especially during the stresses caused by impacts in the case of motor vehicles

Method used

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  • Process for overmoulding over a plastic insert and automobile part obtained by this process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0046] The overmolding material according to the invention is produced as follows:

[0047] In a standard twin-screw extruder, pellets of polypropylene / ethylene copolymer in the ratio P / E 80 / 20 were poured into the feed hopper. This extruder allows the addition of various compounds about one-third of the way down the extrusion path when the initial polymer is already molten. From this add:

[0048] - 12% talc by mass;

[0049] - EPR with a mass ratio of 10% (PP 108MF10 sold by Saudi Basic Industries Corporation (SABIC), whose address is Le Monge–22place des Vosges, La Défense 5, 92979 Paris La Défense cedex, France);

[0050] - SEBS grafted with maleic anhydride (type KRATON FG 1901G) at 0.2% by mass; and

[0051] - 10% by mass PP grafted with AM, Orevac CA 100 type.

[0052] Polymers of the Kraton FG type are polymers grafted by the addition of maleic anhydride. The graft ratio of these polymers is about 1.0 to 1.7% by mass. These polymers are sold by Kraton Performan...

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Abstract

Process for manufacturing a composite automobile part by overmoulding, over at least one surface of an insert (1) comprising a first plastic material, a layer of a second thermoplastic material, said process comprising the following successive steps : a) a step of positioning said insert (1) in a mould, and b) a step of moulding said second thermoplastic material over said insert; at least one of said first and second materials comprising an additive, said additive comprising a polymer to which carboxylic anhydride monomers are grafted. Said first and second materials being respectively based on polyamide and based on polypropylene, or vice versa and said second material comprising talc as mineral filler.

Description

technical field [0001] The invention relates to the manufacture of motor vehicle components made of materials based on one or more (thermoplastic) plastic compounds. The invention relates in particular to a method enabling the manufacture of motor vehicle components, in particular body parts. Background technique [0002] A motor vehicle may comprise numerous parts made of plastic, usually realized by means of a molding process by means of injection, and comprising one or more inserts. These inserts are pre-forms that are incorporated into and / or integral with the molded part, which generally serve to reinforce the molded part and / or fix mechanical elements thereafter . These inserts can be made of steel, aluminum or composite plastic material. The parts obtained may be structural or semi-structural parts of the motor vehicle in question. Thus, the overmoulding of the part is not obtained by simultaneous injection molding of the insert and the layers incorporating it. H...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/14
CPCB29C45/14B29C45/14311B29K2023/12B29K2105/0005B29K2509/00B29K2677/00B32B27/08B32B27/32B32B27/34
Inventor 斯蒂芬·金加安东尼·舍内弗雷德里克·维奥马林·伯纳德爱丽丝·迪博斯特
Owner CO PLASTIC OMNIUM