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Jounce bumpers made by corrugated extrusio

A buffer and system technology, applied in the field of bump buffers, can solve the problem of high cost

Inactive Publication Date: 2010-03-17
EI DU PONT DE NEMOURS & CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Injection blow molding produces a finer final blown structure than extrusion blow molding, but at a higher cost

Method used

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  • Jounce bumpers made by corrugated extrusio
  • Jounce bumpers made by corrugated extrusio
  • Jounce bumpers made by corrugated extrusio

Examples

Experimental program
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Effect test

Embodiment Construction

[0074] The following materials were used to manufacture a single layer jounce bumper according to the invention:

[0075] The following copolyetherester compositions were polymerized. The composition contained 35 weight percent poly(tetrahydrofuran) having an average molecular weight of about 1000 as a polyether block, the weight percent being based on the total weight of the copolyetherester composition. The short-chain ester units are polybutylene terephthalate segments. The copolyetherester composition has a melting point of 200°C and a hardness of 55 shore D. Such products are commercially available from E.I. DuPont deNemours and Company (Wilmington, Delaware, USA).

[0076] Five jounce bumpers made of the above copolyetheresters were fabricated as follows:

[0077] Pellets of the copolyetherester polymer were fed into an extruder (Maillefer SA, Switzerland) with a barrel temperature set at about 220°C to about 240°C. The temperature of the tubular die (die diameter: 2...

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Abstract

The invention provides vehicle suspension systems, and more particularly jounce bumpers made by corrugated extrusion.

Description

field of invention [0001] The present invention relates to the field of automobile suspension systems, and more particularly to jounce bumpers. Background of the invention [0002] The bump buffer is a shock-absorbing component installed on the top of the car suspension, also known as a buffer block, stroke end buffer, strong buffer, suspension buffer or compression buffer. Jounce bumpers have long been used in automotive suspension systems to dampen collisions between two suspension system components such as a wheel axle and a portion of a vehicle frame, and to reduce noise and vibration to Increase passenger comfort. Since the displacement of the car chassis causes the displacement of the strut, the strut is subjected to periodic compression and tension with the displacement of the car chassis. The strut assembly and bodywork must be protected from damage from bump forces associated with severe road irregularities that cause excessive suspension displacement. To do this...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16F1/373
CPCF16F1/3732F16F1/424
Inventor C·谢尔文P·L·塞克利T·多尼斯D·范德齐佩
Owner EI DU PONT DE NEMOURS & CO
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