Bollhoff Verbindungstechnik Gmbh

Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Bofag Fasteners Ag

Francisco Tovar

Michael Stumpf

Franz-Josef Wöstmann

Andreas Marxkors

Michael Heuser

Klaus-Friedrich Grubert

Tobias Beyer

Marco Haesche

Ralf Dörr

Christoph Pille

A metal casting method and a plastic injection molding method in which an insert is molded in molten material such that no molten material enters the interior of the insert. The usage of a wire thread insert as insert has the advantage that for example in an aluminum cast part thread holes can be produced already as part of the casting process. For this purpose, the casting mold, the insert, as well as the casting method are described.

Casting mold, insert for a casting mold, a cast part and a casting method therefor

A threaded element in the shape of a wire thread insert with a specific geometric design is disclosed. This threaded element contains, in particular, a narrowed helical winding of at least two helical winding sections that enclose one or a plurality of sequential secants. Based on this geometric design of the threaded element, a matched installation process is described.

Installation method for a component in an opening of mating component

A mounting spindle with a thread that is formed adapted to the thread-protecting element, formed as a helical wire, serves as a mounting tool with the mounting method. The helical wire is fixed on the mounting spindle by frictional engagement, which is greater than the torque necessary for mounting the helical wire into the receiving threads. The mounting spindle with the helical wire fixed thereon is then threaded into the receiving threads. Then, the mounting spindle is removed from the helical wire by rotation opposite to the mounting direction. The frictional force is achieved by a reduced-diameter end section of the helical wire.

Method for mounting a thread-protecting element into a receiving thread and mounting spindle and a thread-protecting element therefore

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Bielefeld, Germany

Francisco Tovar