Fischerwerke Artur Fischer Gmbh & Co Kg

Guenter Seibold

Bernd Plocher

Manfred Haage

Bernd Hein

Wilfried Weber

Norbert Arnold

Interlocking metal parts that slide under pressure on one another are manufactured so that at least one metal part is manufactured by a powdered metal injection-molding method, an in order to improve the sliding behavior and to minimize the binding tendency, a non-metallic substance having a structured arrangement of molecules is admixed in powdered or granular form with the powdered metal of the metal part manufactured by powder injection molding. The substance is inert towards the metal and has a thermal stability of at least 900.degree. C. In particular, ceramic solid materials or fillers are suitable substances.

Method of producing interlocking metal parts

An anchor bolt has locking elements arranged over a part of the outer surface and formed as radially projecting lugs which are spaced circumferentially and axially from one another. Therefore a good mixing of a compound mass and reduction of the driving-in resistance is obtained. Therefore the outer diameter measured over the lugs of the anchor bolt can be matched approximately to the diameter of the drilled hole. Simple and inexpensive manufacture of the anchor bolt can be provided by powdered metal injection molding method using a system of binders with subsequent removal of the binders and sintering.

Anchor bolt for anchoring by compound mass, and method of manufacturing

The expansible metal anchor (1) for anchoring in a hole drilled in a component includes a shank part (2) and an expander cone (4) having a polygonal cross-section defining several faces (13) at its front end. On each face (13) of the expander cone (4) an expansible segment (5) is arranged spaced from that face by a gap (7) corresponding approximately to the distance (8) by which the expansible segments (5) project radially from the shank part (2). Each expansible segment (5) is joined to the shank part (2) at its end face directed towards the shank part (2) by web members (6, 6') constituting predetermined break points. As the expansible anchor is driven into the hole drilled in the component, the web members (6,6') break off, so that the expansible segments (5) are displaceable on the faces (13) of the expander cone. The expansible anchor (1) is manufactured from powdered metal by an injection-molding process using a system of binders with subsequent removal of the binders and sintering, and a slide member of the mold divided at the corner edges (20) of the faces (13) is used to make the gap (7) between the expansible segments (5) and the faces (13) of the expander cone (4).

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Pfalzgrafenweiler, Germany

Guenter Seibold