Pressing die for producing ceramic moulds from a pulverulent mas

Details Pressing die for producing ceramic moulds from a pulverulent mas Pressing die for producing ceramic moulds from a pulverulent mas

1978-02-24

1979-06-12

Flint, Jr., J. Howard

Plastic article or earthenware shaping or treating: apparatus

Means to create a vacuum or apply fluid pressure within a...

425412, 425415, 425422, 425423, 425DIG19, B30B 502, B28B 302, B28B 708, B28B 710

Patent

active

041578872

ABSTRACT:
A press tool for production of moulded ceramic articles from powder material includes a lower tool part adapted to be supported on a press table and carrying a lower die. A matrix shell encircles the lower die and is mounted to move up and down relatively to it. An upper tool part is adapted to be connected to the plunger of the press and carries an upper die which on lowering of the plunger of the press projects into the matrix shell. To fill the powder material into the cavity defined by the lower die and the matrix shell, an annular hopper in the form of an funnel encircles the upper die and is mounted to slide axially thereon. The hopper has an annular outlet facing radially inwards and opening into the cavity when the hopper is in its lower position with respect to the upper die but closed by the upper die when the hopper is in a raised position relatively to the upper die.

REFERENCES:
patent: 1712233 (1929-05-01), Slick
patent: 2152738 (1939-04-01), Jeffery
patent: 2290910 (1942-07-01), Jeffery
patent: 3239591 (1966-03-01), Wendt
patent: 3425363 (1969-02-01), Carbon
patent: 3587144 (1971-06-01), Mechling
patent: 3632276 (1972-01-01), Memk
patent: 3664799 (1972-05-01), Wallick, Jr. et al.

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