Back to results
US 4,104,353 AGranted
Method of injection moulding of articles of several materials
AssigneeBillion S.A.
InventorBernard Leon Monnet
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeBillion S.A.
InventorBernard Leon Monnet
Estimating the term…
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.
A method of injection molding of complex articles of large size, having at least locally, composite portions comprised of at least two materials of different compositions, one of which is coated by the other, the injection of the materials forming said composite portions being effected in at least two different zones of the mold cavity, said method comprising the steps of:
A method of injection molding of complex articles of large size, having at least locally, composite portions comprised of at least two materials of different compositions, one of which is coated by the other, the injection of the materials forming said composite portions being effected in at least two different zones of the mold cavity, said method comprising the steps of:
A method of injection molding of articles of large size, having at least locally, composite portions comprised of at least two materials of different compositions, one of which is coated by the other, the injection of the materials forming said composite portions being effected in at two different zones of the mold cavity, said method comprising the steps of:
Dependencies are inferred from the claim text.