Method for forming an object of thermosetting synthetic material

Details Method for forming an object of thermosetting synthetic material Method for forming an object of thermosetting synthetic material

1994-02-15

1995-09-12

Heitbrink, Jill L.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

26432815, 26432816, 425571, 425543, 425549, B29C 4514, B29C 4517, B29C 4573

Patent

active

054494850

ABSTRACT:
Method for forming an object (2) of thermosetting synthetic material in a mould (6), having at least one chamber (9), according to which method a mixture of components, which react and cure above a critical temperature, is put in liquid form in the chamber (9) through an inlet piece (1), which is provided with at least one filling duct (3,5) which opens into the chamber (9). The mixture is allowed to react and cure by making sure that the temperature of the mould (6) is higher than said critical temperature. The object (2) with the inlet piece (1) is removed from the mould (6). More particularly, the liquid mixture is inserted in the mould (6) through the inlet piece (1) which sticks through a wall (8) in the mould (6) and which extends outside the mould (6), by means of a casting nozzle (14) which is kept at a temperature which is lower than the critical temperature, whereby the extremity of the casting nozzle fits liquid-tight on the filling opening (4) of the above-mentioned inlet piece (1). At least during the filling of the mould (6), the inlet piece (1) has a lower temperature than the above-mentioned critical temperature, such that the curing first takes place against the inner wall of the mould (6) and finally against the inlet piece (1), and during the curing in the mould (6) a pressure is exerted on the curing synthetic via the cashing nozzle (14).

REFERENCES:
patent: 2410510 (1946-11-01), Lester
patent: 4784814 (1988-11-01), Diethelm et al.

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