Process for producing surface-finished lightweight components with high natural fibre content and integrated fastening elements

A lightweight component, natural fiber technology, applied in the direction of coating, can solve the problems of low impact toughness and high cost, and achieve the effect of high shape stability, low inherent stress, and shortened working cycle time.

Inactive Publication Date: 2013-08-21
KRAUSSMAFFEI TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, foam components have a costly process cont

Method used

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  • Process for producing surface-finished lightweight components with high natural fibre content and integrated fastening elements
  • Process for producing surface-finished lightweight components with high natural fibre content and integrated fastening elements

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0049] exist figure 1 Shown in is a general process flow diagram, as described in claim 1. Step 1 shows the preparation of the semifinished product ( 1 ) between a first mold half ( 4 ) on the left side of the semifinished product and a second mold half ( 5 ) on the right side of the semifinished product. In step 2, the natural fiber semi-finished product (1) in the injection molding tool (comprising the first and the second tool half) is pressed, wherein the two mold halves or the two tool halves are moved relative to each other. Step 3 consists in back-injecting the natural fiber semi-finished material at the locations where functional elements such as in particular holding bodies and / or reinforcement structures are provided. The functional element, in particular the holding body and / or the structurally reinforcing plastic material ( 2 ), fills the cavity of the first mold half. Since the natural fiber semi-finished product (1) is not subjected to compression forces in the...

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Abstract

A process is described for producing a lightweight component comprising natural fibres (FRP component), which has a visible side and a fastening side. In order to manufacture a lightweight FRP component with a high degree of design freedom, any desired type of surface, and substantially reduced cost for downstream operations, the following production steps are proposed according to the invention: a) insertion of a semifinished natural fibre product into an injection mould, b) a pressing and/or forming process, and also consolidation of the semifinished natural fibre product, to give a moulding in the injection mould, c) injection to add functional elements, in particular fastening elements, and/or reinforcing structures, onto the moulding on the fastening side of the lightweight component, into unoccupied spaces in the injection mould, the functional elements, in particular the fastening elements and/or the reinforcing structures being injected only onto a portion of the area of the fastening side, and d) applying the surface component in a prescribed region of the visible side of the moulding.

Description

technical field [0001] The invention proposes a method for producing lightweight components with a high proportion of natural fibers and finished surfaces. In addition, a device for carrying out the method is described. Such components are preferably used in automobile construction. Background technique [0002] Natural fiber-reinforced plastic components for automotive interiors (hereinafter also referred to as NFK-components) are mostly produced on the basis of planar semi-finished products, mainly by pressing. A natural fiber fraction of more than 80% by weight, a low material density and high structural property values ​​can be achieved here. Compared to injection molding, the degree of freedom of shaping of pressed components is considerably restricted with regard to local structural rigidity, for example due to ribs and the implementation of fastening elements such as retainers. In addition, the conversion generation of soft surfaces requires subsequent cladding of ...

Claims

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Application Information

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IPC IPC(8): B29C45/16B29K311/10B29C45/14
CPCB29C45/1671B29C45/1418B29C45/14786B29C2045/14286B29K2311/10
Inventor M·格鲁贝尔S·威德迈尔M·维特勒W·嫩德尔A·拖多罗夫S·席尔R·林伯格
Owner KRAUSSMAFFEI TECH GMBH
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