Cutting flexible formed products from foam retaining sheet

Details Cutting flexible formed products from foam retaining sheet Cutting flexible formed products from foam retaining sheet

1986-08-15

1988-03-15

Yost, Frank T.

Severing by tearing or breaking

Methods

With preliminary weakening

53559, 83103, 83374, 83451, 225 96, 225 97, 225103, B26F 300, B26D 900

Patent

active

047307617

ABSTRACT:
A method for cutting flexible formed shell product from a flexible plastic foam sheet. In the method, a foam shell formed in the sheet is drawn into and positioned in a die unit lower cavity and the die assembly is clamped together. A cutting die unit having dual curved serrated knife elements then descends and severs the formed shell from the sheet at all locations except for two short segments located at opposite ends of the formed shell. Then as a separate step, the partly severed formed shell is punched out from the flexible foam sheet, so as to provide multiple formed products. The products are usually formed as multiple units oriented in an end-to-end relationship in the foam sheet and which are simultaneously severed from the sheet. Cutting die apparatus adapted for cutting the formed products from the foam sheet is also disclosed.

REFERENCES:
patent: 3088353 (1963-05-01), Hanington
patent: 3477322 (1969-11-01), Gerber et al.
patent: 4108343 (1978-08-01), Vossen
patent: 4233801 (1980-11-01), Watt

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