Browse Prior Art Database

Upper Core Press Punches

IP.com Disclosure Number: IPCOM000093622D
Original Publication Date: 1967-Nov-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 65K

Publishing Venue

IBM

Related People

Lessick, LE: AUTHOR [+2]

Abstract

The lower die D of a rotary core press has stationary core rod 1 and vertically movable lower punch 2 that, along with the die walls, form die cavity 3. A core is pressed by first filling cavity 3 with powder at a fill station. Then an upper punch 4 is lowered to seal cavity 3. Lower punch 2 is raised to compact the powder into a core. Finally, upper punch 4 is raised to clear cavity 3 and punch 2 is raised to eject the core.

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Upper Core Press Punches

The lower die D of a rotary core press has stationary core rod 1 and vertically movable lower punch 2 that, along with the die walls, form die cavity 3. A core is pressed by first filling cavity 3 with powder at a fill station. Then an upper punch 4 is lowered to seal cavity 3. Lower punch 2 is raised to compact the powder into a core. Finally, upper punch 4 is raised to clear cavity 3 and punch 2 is raised to eject the core.

The drawings show two forms of upper punches 4a and 4b. Punch 4a is a circular roller 5 adapted to be held against die D by spring 6. Roller 5 has a large diameter relative to the size of cavity 3, so that its peripheral surface is adapted to cover the cavity and present a substantially flat surface relative to it.

Punch 4b comprises plunger 7 having flat surface 8 for extending across and sealing cavity 3. Plunger 7 is adapted to be held against die D by spring 9.

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