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Impact absorbing device with tape-like device attached

A technology of shock absorption and equipment, applied in bumpers, vehicle parts, vehicle safety arrangements, etc., can solve problems such as difficulty in fixing slender metal components and limiting design freedom

Inactive Publication Date: 2007-10-10
NV BEKAERT SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the design and manufacture of such wire or cord-reinforced shock absorbers has encountered some problems
For example, during the extrusion molding of the device, the fixation of elongated metal elements in the device may present difficulties
Also, the beam may be designed without undercuts so that it can be molded, this absence of undercuts strongly limits the design freedom of such reinforced beams
[0008] Moreover, when one wants to replace an existing shock-absorbing device made of metal or composite material with a metal-reinforced composite shock-absorbing device, this replacement entails redesigning the matrix volume of the shock-absorbing device, making it necessary to design and Manufacture of new extrusion dies and raises many technical and economical problems

Method used

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  • Impact absorbing device with tape-like device attached
  • Impact absorbing device with tape-like device attached
  • Impact absorbing device with tape-like device attached

Examples

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Embodiment Construction

[0072] As shown in Figures 1a and 1b, a shock absorbing device 100 is provided whose matrix volume 101 is made of GMT comprising polypropylene and 40% by weight of random glass fibers and has a U-shaped section with a thickness of 5 mm 104. A height 103 of 45mm, a width 102 of 90mm and a length 116 of 1480mm. The impact absorbing device 100 has an impact surface designated 105 .

[0073] At the end 106 of the U-shaped base volume 101, a strap-like device 107 comprising metal cords 108 is attached 109 where the base volume 101 and the strap-like device 107 meet, thereby providing a shock absorbing device.

[0074] The metal cord 108 used to provide the strap-like device 107 is a 3x0.26+9x0.245 steel cord. 89 cords equally spaced from each other are used to provide a width equal to the width of the impact absorbing device 102, which is 90 mm. Around these cords, a polypropylene layer with a thickness 113 of 2 mm was formed by laminating two layers of polypropylene around the c...

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Abstract

A method of manufacturing an impact absorbing device has following steps: a) providing a matrix volume (101); b) providing a tape-like device (107) with elongated metal elements; c) press-molding the matrix volume (101); d) attaching said tape-like device (107) to the press-molded matrix volume (101). This two-step approach allows more freedom in the design of the impact absorbing device and complex structures can be obtained.

Description

technical field [0001] The present invention relates to a method for manufacturing impact absorbing devices such as vehicle bumper levers and vehicle door beams. The invention also relates to the shock-absorbing device thus obtained. Background technique [0002] Impact-absorbing devices such as impact-absorbing bumpers or door cross members are known in the prior art. [0003] Currently, such shock-absorbing devices can be made from a matrix of metal, such as steel or aluminium. A disadvantage of such metal shock absorbers is their relative weight, which is a disadvantage when used in motor vehicles or transport devices. Due to their manufacturing method, the functional integration of such metal shock absorbers is not flexible enough. Weight increases fuel consumption because the vehicle has to carry that weight all the time. [0004] An alternative to such heavy impact absorbing devices arises when synthetic materials are used as composite materials, typically glass fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60R19/18
CPCY10T156/1002B60R2019/1806B60R19/18
Inventor W·德凯泽E·洛克雷J·加朗斯
Owner NV BEKAERT SA
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