Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting – Controlling fluid pressure in direct contact with molding...
Patent
1991-01-11
1992-08-25
Tentoni, Leo B.
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
Controlling fluid pressure in direct contact with molding...
2643288, 26432812, 26432813, 264572, B29C 4500, B29D 2200
Patent
active
051416824
ABSTRACT:
A method for supplying a selected quantity of gas to the mold of an injection molding machine utilizes two high pressure gas bottles which are connected through a pressure reducing valve to a piston reservoir for receiving a quality of the gas. The piston reservoir is hydraulically powered to supply the gas to a further piston reservoir having a smaller volume which is connected through a valve to the mold. The second piston reservoir is also hydraulically powered for supplying a selected quality of gas under a variable pressure to the mold. Gas from the mold is recycled to both reservoirs in steps.
REFERENCES:
patent: 3825386 (1974-07-01), Bello et al.
patent: 4126657 (1978-11-01), Gado
patent: 4394333 (1983-07-01), Fukushima et al.
Lampl Alfred
Steinbichler Georg
Engel Maschinebau Gesellschaft m.b.H.
Hydac Technology GmbH
Tentoni Leo B.
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