Method for producing plastic parts with foam core

A technology of plastic parts and foam, which is applied in the field of manufacturing plastic parts with a sandwich structure, which can solve the problems of long cycle, slow thickness, cracks on the skin, etc.

Inactive Publication Date: 2019-05-10
CO PLASTIC OMNIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, achieving such thicknesses by dilation is slow, resulting in very long cycles (180s to 360s)
[0028] Finally, managing the edges of these parts is rather tricky
In fact, the skins at the edges cross-link when the foamed SMC expands, which means that there is a risk of cracks in the upper and lower skins

Method used

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  • Method for producing plastic parts with foam core
  • Method for producing plastic parts with foam core
  • Method for producing plastic parts with foam core

Examples

Experimental program
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Embodiment Construction

[0049] now refer to figure 1 , which shows a method according to the invention for producing a plastic part PS with a sandwich structure. The method mainly includes the following steps:

[0050] - arranging at least two fiber-reinforced plastic sheets FMP in the mold MO;

[0051] - arrange at least one foam insert IM between the plastic sheets FMP in the mold MO, which foam insert IM constitutes a structural core;

[0052] - closing the mold MO and applying (by means of the heating means MC) a pressure and a temperature chosen to allow the flow and polymerization of the plastic material;

[0053] - Demoulding of the part PS thus obtained.

[0054] exist Figure 1 to Figure 3 In, step (a) shows placing fiber reinforced plastic sheet FMP and foam insert IM into mold MO, step (b) shows compression and firing when the mold is closed, step (c) shows Opening of the mold and demoulding of the part.

[0055] The invention is illustrated according to a specific embodiment in whic...

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Abstract

The invention relates to a method for producing a plastic part (PS) with a sandwich structure, wherein: at least two fiber-reinforced plastic sheets (FMP) are arranged in a mold (MO); in said mold (MO) Arrange at least one foam insert (IM) between said plastic sheets (FMP), said foam insert constituting a structural sandwich; close said mold (MO), apply pressure and temperature, said pressure and temperature being chosen to allow Flow and polymerization of said plastic material; demoulding of the part (PS) thus obtained.

Description

technical field [0001] The invention relates to the technical field of methods for the manufacture of plastic parts. In particular, the invention relates to a method for producing a plastic part having a sandwich structure with a foam core. Background technique [0002] In the field of vehicles for example, many components must be both mechanically strong and light in weight. To this end, it is known to replace steel parts with plastic parts. [0003] Different methods of molding plastic parts are known: [0004] ·By pressing (for thermosetting materials, such as SMC (Sheet Molding Compound, sheet molding compound)); [0005] by means of thermoforming (pressing with thermoplastic material); [0006] · by injection molding method (for thermoplastic materials); [0007] • By resin transfer method (RTM ((Resin Transfer Molding, resin transfer molding)). [0008] It is known to use reinforced (thermoset or thermoplastic) plastic materials. These materials are constructed ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C65/18B29L31/30
CPCB29C65/18B29C66/712B29L2031/3017B29C43/003B29C43/006B29C43/18B29C70/086B29C44/569B29C70/46B29B11/06B29C43/52B29K2105/04B29K2701/00B29L2009/00
Inventor 让-佛朗索瓦·普拉丹尼·吉勒理查德·埃霍
Owner CO PLASTIC OMNIUM
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