Method for producing a composite part by transmission laser welding

A technology of laser transmission welding and composites, applied in the direction of chemical instruments and methods, layered products, layered product processing, etc., can solve the problem that welding is no longer sufficient

Active Publication Date: 2011-06-29
FRESENIUS MEDICAL CARE DEUTSCHLAND GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this would mean that, depending on the plastic used for the membranes, the thermal development of the membranes in the joining area is no longer sufficient to achieve a complete weld

Method used

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  • Method for producing a composite part by transmission laser welding
  • Method for producing a composite part by transmission laser welding
  • Method for producing a composite part by transmission laser welding

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Embodiment Construction

[0040] According to an embodiment of the method of the present invention, reference below figure 1 and 2 To explain the composite body obtainable by this method and the composite welded array device according to the present invention.

[0041] according to figure 1 , the composite welded array device is formed according to one embodiment of the present invention from a hard plastic part 1, a multilayer film 2 is flatly arranged on the hard plastic part 1, and a flexible plastic part 3 is flatly arranged on the multilayer film 2 And press tool 4 on.

[0042] Any weldable thermoplastic which is sufficiently thermodynamically compatible with the corresponding membrane during welding can be used as plastic for the rigid plastic part 1 . The rigid plastic part 1 is preferably formed from polypropylene. More suitable materials are, for example, polyethylene, polyisoprene, polyethylene terephthalate (PET), polycarbonate, their mixtures and their copolymers.

[0043] The multil...

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Abstract

The present invention relates to a method for producing a composite part by transmission laser welding, comprising the steps: a) flat arrangement of a multilayer film (2) comprising a joining layer on a hard plastic part (1) such that the joining layer abuts the hard plastic part (1), wherein the joining layer comprises an absorber for laser light, b) pressing the multilayer film (2) onto the hard plastic part (1) using a pressing tool (4) pervious to laser light, and c) irradiating the arrangement obtained in step b) with laser light from the side of the multilayer film (2). The invention further relates to a composite part that can be obtained by said method and to a composite part welding arrangement used in said method.

Description

technical field [0001] The invention relates to a laser welding method for welding rigid plastic elements to multilayer films, a composite body obtainable thereby and a composite welding array device used in the method. Background technique [0002] In principle, there are various possibilities for the mating connection of shaped parts made of plastic, especially heterogeneous plastic. For example, two shaped parts can be joined to one another in a cooperatively glued or welded manner. [0003] As welding methods, besides infrared welding (see, for example, WO 2005 / 080067), welding by means of laser radiation has recently been tested particularly intensively. [0004] The basic physical principle of the laser mode welding method requires that at least part of the applied laser light be absorbed by the material of at least one of the two formed parts that are interconnected, at least to such an extent that it can be converted into heat and placed in place The material heate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C65/16B32B27/28B29C65/00
CPCB32B37/0076B29C65/1616B29C66/001B32B37/04B32B3/30B32B27/08B29C66/81B32B7/04B29C65/1635B32B7/02B29C65/1619B29C66/81267B29C65/1683B32B27/34B29C66/723B29C66/1122B32B2310/0843B32B27/32B32B27/18B29C66/43B29C65/1674B29C65/168B29C66/472B29K2995/007B29C66/81264B29C66/81457B29C66/73921B29C66/71B32B25/08B32B25/20B32B27/302B32B27/36B32B27/365B32B2270/00B32B2307/734B29C66/73774B29K2995/0027B29C66/712B29C66/73152Y10T428/269Y10T428/24612Y10T428/31938Y10T428/31931B29K2023/04B29K2023/10B29K2069/00B29K2067/003B29K2077/00B29K2025/08B29K2023/18B29K2023/12B29K2023/06
Inventor 弗兰兹·库格曼托拜厄斯·韦伯
Owner FRESENIUS MEDICAL CARE DEUTSCHLAND GMBH
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