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Method for producing a multilayered part

A multi-layer, component technology, applied in the direction of thin material handling, transportation and packaging

Active Publication Date: 2009-06-03
雷克蒂塞尔汽车配件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this known method is that, in order to achieve the required sealing function, the substrate must be made of a material exhibiting suitable compressibility and deformability

Method used

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  • Method for producing a multilayered part
  • Method for producing a multilayered part
  • Method for producing a multilayered part

Examples

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Effect test

example 1

[0042] The PC / ABS base layer was molded by injection molding in the form of a 20 cm x 20 cm panel. One side of this board was overmolded with a layer of SEBS of 6mm thickness. The SEBS layer has about 1000kg / m 3 Density and Shore A hardness of 0. The SEBS layer is then overmolded with a polyurethane reaction mixture to produce a 3 Density polyurethane skin.

[0043] In order to measure the additional softness obtained by the SEBS layer, the ILD (Indentation Load Deflection) value of the multi-layered part was determined, which refers to the need for a 14mm stamping head to punch 2mm of the material at a speed of 5mm / min. force. The same ILD value determination was carried out on a commonly used multilayer part, which included a PC / ABS base layer, a commonly used semi-flexible polyurethane back foam layer (with a thickness of 15mm) and also with a 1.2mm The same polyurethane surface layer of average thickness. The ILD value of the multilayer ROM part measured by the method ...

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Abstract

The invention relates to a method for producing a multilayered part which comprises a moulded core (5) and a flexible polyurethane skin layer (4). The core itself comprises a moulded substrate layer (1) which is made of a substrate material, in particular a thermoplastic material, having a Shore A hardness higher than 60. The flexible polyurethane skin (4) is produced by a reaction overmoulding (ROM) process wherein a polyurethane reaction mixture is moulded in a closed mould (11, 12) over at least a first area of the core surface. The moulded core (5) comprises in addition to said substrate layer (1) a softer material which is moulded onto the substrate layer (1) and / or onto which the substrate layer (1) is moulded. This moulded softer material has a Shore A hardness lower than 60 and forms a softer layer (2) between the flexible polyurethane layer (4) and the substrate layer (1) and / or a seal (3) engaging the internal wall of the mould (11, 12) during the ROM process.

Description

technical field [0001] The invention relates to a method for producing a multilayer part comprising a molded core and a flexible polyurethane layer formed from a flexible polyurethane skin or from a flexible integral skin polyurethane foam layer. The core itself comprises a molded base layer made of a base material having a Shore A hardness higher than 60. The flexible polyurethane layer has a higher than 400kg / m 3 and preferably higher than 500kg / m 3 average density. The method comprises the steps of: providing a mold having at least first and second mold parts movable relative to each other to open and close the mold; providing a molding core inside the mold so that when the mold is closed When, there is a gap between the surface of the core and the inner wall of the mold; the polyurethane reaction mixture is introduced into the gap between the surface of the core and the inner wall of the mold to cover at least the first part of the surface of the molded core with the po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C44/08B29C67/24
CPCB29C67/246B29C44/086Y10T428/24983B29C67/24B29C44/08
Inventor J·德瑟尔K·德梅岑纳雷G·雷马克尔斯H·德温特S·莫昂D·梅尔特
Owner 雷克蒂塞尔汽车配件有限公司
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