Resistive Implant Welding of Thermoplastic Materials with Butt Joints
a technology of resistive implant welding and butt joints, which is applied in the direction of transportation and packaging, chemistry apparatus and processes, and other domestic objects, and can solve the problem of restricting the use of these techniques
Inactive Publication Date: 2010-11-11
MAGNA INTERNATIONAL INC
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- Abstract
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- Application Information
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Benefits of technology
The present invention provides a new way to join thermoplastic materials together using resistive implant welding. This method involves forming a tongue and a groove in the components to be joined, inserting the tongue into the groove, and applying pressure while using an electric current to melt the thermoplastic material. Once the material has cooled, a weld is formed. This method overcomes previous limitations and provides a more efficient and reliable way to join thermoplastic materials.
Problems solved by technology
While resistive implant welding is proving to be a promising technique for forming lap welds between thermoplastic materials, to date resistive implant welding techniques have only been able to form lap welds which limits the use of these techniques.
Method used
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[0014]As used herein, the term “plastic” is intended to comprise thermoplastic materials in general and such thermoplastic materials can include added materials, such as glass fibers, to alter their mechanical properties. While some of the following discussion makes specific reference to glass fiber reinforced polypropylene plastics, the present invention is not limited to use with this particular reinforced thermoplastic material.
[0015]As discussed above, resistive implant welding is known. In general, the technology of resistive implant welding is described in, “Resistive Implant Welding of Glass Fiber Reinforced Polypropylene Compounds”, by Bates, Tan, Zak and Mah, published by the Society of Automotive Engineers, SAE Technical Papers, document number 2006-01-0332 and the contents of this paper are included herein, in its entirety, by reference.
[0016]However, existing resistive implant welding is used to connect plastic components via lap joints. In many circumstances, it is desi...
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Abstract
A method for forming butt joints between thermoplastic members by resistive implant welding. A tongue is formed on one member to be joined and a complementary groove is formed in the other member. A resistive implant is placed between the tongue and the groove which are then pressed together by an applied pressure. An electric current is run through the resistive implant to melt a portion of the thermoplastic material of both the tongue and groove, and the melted plastic intermingles through the implant. When the electric current is removed, the plastic cools, forming a weld.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a PCT International Application of U.S. Patent Application No. 61 / 007,239 filed on Dec. 11, 2007. The disclosure of the above application is incorporated herein by reference. This application claims the benefit of U.S. Provisional Application No. 61 / 007,239, filed Dec. 11, 2007.FIELD OF THE INVENTION[0002]The present invention relates to resistive implant welding of thermoplastic components. More specifically, the present invention relates to a method and system for forming butt joints of thermoplastic components using resistive implant welding.BACKGROUND OF THE INVENTION[0003]A need exists to join thermoplastic components, such as those formed from glass fiber reinforced polypropylene or the like, to other plastic components formed of similar materials. To date, such joining has been achieved via adhesives, mechanical fasteners, laser welding and / or sonic or vibration welding.[0004]More recently, lap welds have been f...
Claims
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IPC IPC(8): B29C65/30B32B3/02
CPCB29C65/344Y10T428/19B29C66/12463B29C66/12469B29C66/1248B29C66/43B29C66/721B29K2023/12B29K2101/12B29K2105/06B29K2309/08B29L2031/30B60R13/00B29C65/3476B29C66/54B29C66/12449B29C66/71B29C66/7212B29C66/73921B29C66/8322B29K2023/10
Inventor GRGAC, STEVENARMSTRONG, BRADFORD D.
Owner MAGNA INTERNATIONAL INC