Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – To produce composite – plural part or multilayered article
Patent
1976-04-05
1978-08-01
Arnold, Donald J.
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
To produce composite, plural part or multilayered article
264 455, 264328, B29D 2700
Patent
active
041043537
ABSTRACT:
The present invention is concerned with a method of and a machine for the production by injection welding of articles of large size and/or complex structures having, at least locally, composite portions formed by the introduction of one of at least two materials of different compositions inside the other, said method comprising the steps of: injecting a first material into at least two different zones of a mould and then injecting a second material into the first material at said zones, the second material pushing the first material against the walls of the mould; and creating in the junction plane of the masses of the first material, a leakage of a pre-determined quantity of said first material, so as to permit the joining and mixing of the two masses of the second material at the level of the junction of the masses of the first material.
The injection-moulding machine for carrying this method into effect comprises a mould having fixed and movable portions, at least two separate systems for supplying materials to be injected into the said mould, and at least two distribution valves for these materials, one of the valves being of the multi-way type so as to cause a common discharge channel for material into the mould to communicate with either or both of the separate material-supply systems.
REFERENCES:
patent: 2191703 (1940-02-01), Anderson
patent: 3599290 (1971-08-01), Garner
patent: 3669598 (1972-06-01), Tucker
patent: 3873656 (1975-03-01), Garner
patent: 3888612 (1975-06-01), Schrewe et al.
patent: 3894823 (1975-07-01), Hanning
patent: 3950483 (1976-04-01), Spier
Arnold Donald J.
Billion S.A.
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