Apparatus and method for establishing or for separating a connection having material continuity or having material continuity and shape matching of at least one metal or ceramic component and of a component formed from or by a thermoplastic polymer

Patent metadata

Field	Value
Publication number	US-11660824-B2
Application number	US-201716087955-A
Country	US
Kind code	B2
Filing date	Mar 14, 2017
Priority date	Mar 23, 2016
Publication date	May 30, 2023
Grant date	May 30, 2023

Abstract

The invention relates to an apparatus and to a method for establishing a connection having material continuity or having material continuity and shaping matching or for separating such a connection of at least one metal or ceramic component and of a component formed from or by a thermoplastic polymer in which the components to be joined together can be pressed together by a pressing device having a counterholder and a plunger. A heating device is present at the plunger and/or at the counterholder or acts there. A heating of the at least one metal or ceramic component up to above the softening temperature of the component formed from or by polymer can be achieved with the heating device, with the heating device being having at least one electrical resistance heating element that is covered by an electrically insulating, preferably ceramic, protective film, and/or having at least one laser beam that is directed to the metal component(s) within the joining region, and/or having at least one inductor present at the plunger and/or at the counterholder for the inductive heating of the meal component(s).

First claim

The invention claimed is:

1. An apparatus for establishing or separating a connection having material continuity between a thermoplastic component having softening and decomposition temperatures and at least one metal component, the apparatus comprising:
a counterholder,
a plunger opposing the counterholder such that the at least one metal component can be pressed there between in a joining region,
a sensor for taking spatially resolved temperature measurements within the joining region, and
a heating device present, or acting, at the plunger, at the counterholder, or at each of the plunger and the counterholder, respectively, wherein the heating device is capable of achieving a homogeneous temperature field within the joining region by taking into account the spatially resolved temperature measurements and adjusting the heating temperature accordingly and heating the at least one metal component within the joining region up to above the softening temperature, and below the decomposition temperature, of the thermoplastic component,
wherein the heating device is a laser beam source adjustable to focus a laser beam within the joining region by at least one of:
(i) the laser beam source being configured to move the laser beam in response to the spatially resolved temperature measurements to create the homogeneous temperature field, or
(ii) the laser beam having an adjustable focus area wherein the size of the focus area is controllable based on the spatially resolved temperature measurements to create the homogeneous temperature field.

2. The apparatus in accordance with claim 1 , further comprising fixing elements or clamping elements present on the plunger and the counterholder, respectively, to engage and release the at least one metal component when present at the plunger and the counterholder.

3. The apparatus in accordance with claim 1 , characterized in that the at least one metal component has a feature for a shape matched connection, wherein the feature comprises:
at least one aperture and/or one recess into which softened or melted thermoplastic polymer enters; or
an elevation that penetrates into the softened or melted polymer.

Assignees

• Fraunhoffer Ges Zur Foerderung Der Angewandten Forschung E V
• Univ Dresden Tech
• Fraunhofer Ges Forschung

Inventors

• Langer Maurice
• Klotzbach Annett
• Pautzsch Robert

Classifications

• B29C65/30

  Electrical means {(B29C65/38 takes precedence)} · CPC title

• B29C66/721

  Fibre-reinforced materials (B29C66/729 takes precedence) · CPC title

• B29C66/7461

  Ceramics · CPC title

• B29C66/91212

  involving measurement means being part of the welding jaws, e.g. integrated in the welding jaws · CPC title

• B29C66/8322

  Joining or pressing tools reciprocating along one axis · CPC title