Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting – Controlling fluid pressure in direct contact with molding...
Patent
1990-02-08
1992-05-19
Thurlow, Jeffery
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
Controlling fluid pressure in direct contact with molding...
264571, 264101, 264255, 2643288, 264DIG78, 425147, 425173, 425388, 425546, 425555, 425DIG60, B29C 4523, B29C 4534, B29C 4576
Patent
active
051146371
ABSTRACT:
A method and apparatus for moulding a fluid settable material. The apparatus includes male and female mould halves defining between them a mould cavity having an inlet thereto for the introduction of a fluid settable material; between the male and female mould halves of the cavity a seal can be interposed to seal the mould cavity from the atmosphere. At least one vacuum outlet from a mould half leads via an isolation valve to a vacuum source. The method includes the steps of creating a depression in the mould cavity by withdrawing air therefrom through the vacuum outlet via the isolation valve, introducing a fluid settable material into the thus evacuated mould cavity until the mould cavity is wholly filled by the settable material, closing the isolation valve between the vacuum outlet and the vacuum source, injecting a small additional quantity of fluid settable material under pressure into the mould cavity, closing the inlet through which the fluid material is introduced into the mould cavity and allowing the fluid settable material to solidify.
REFERENCES:
patent: 2903389 (1959-09-01), Fujita
patent: 3055058 (1962-09-01), Van Hartesveldt
patent: 3410936 (1968-11-01), Juras
patent: 4030953 (1977-06-01), Rutschow et al.
patent: 4036922 (1977-07-01), Ho et al.
patent: 4359437 (1982-11-01), Le Comte
patent: 4767308 (1988-08-01), Adams
patent: 4855097 (1989-08-01), Iseler et al.
patent: 5000902 (1991-03-01), Adams
Gibson Trevor P.
Williams David R.
Short Brothers PLC
Thurlow Jeffery
Vargot Mathieu
LandOfFree
Method and apparatus for moulding a fluid settable material does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for moulding a fluid settable material, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for moulding a fluid settable material will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2416062