Patent · US Active

Method for producing a molded part provided with a through-hole

US9120142B2 · kind B2 · utility

2Cited by

2References

13Claims

0Family size

Assignee

Hatebur Umformmaschinen AG · CH

Inventors

Andreas Matt · Murg, DE
Mihai Vulcan · Therwil, CH

Key dates

Filing date	Oct 2, 2009
Grant date	Sep 1, 2015
Priority date	—
Expiry date	Sep 9, 2030

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB21K1/04
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

To produce a molded part with a through-hole, a rod-shaped blank is pushed through a guide into a cavity and fixed in place. The end region of the blank is compressed and reshaped into a disk. A disk core having the same cross-sectional shape as the blank is ejected out of the disk using a punch and pushed into the guide and moved back together with the unshaped part of the blank. The disk is severed from the disk core and the molded part is removed from the cavity. During the penetration step, the disk present in the cavity is subjected to an axial pressure in the disk core ejection direction and the blank is subjected to an axial counter-force opposite to the disk core ejection direction.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.