Apparatus and a process for the injecto-compression moulding of articles made of plastic material with two components
AssigneeINCOS S.p.A.
InventorAfro Rossanese
Life of this patent
Estimating the term…
Abstract
Described herein is injecto-compression moulding of articles made of plastic material with two components by means of a press of the stack-mould type in which the moulding cavity of the second component is maintained in a position of partial opening during the injection and compression of the first component within the first moulding cavity. There is moreover provided a retention system, which is associated to at least one of said first and second cavities.
Claims8
An apparatus for the moulding of articles made of plastic material with two components comprising:
- a rotating central element, which bears a first mould and a second mould set opposite to one another;
- a first countermould and a second countermould, which are set on opposite sides with respect to the rotating central element and can be translated with respect thereto;
- means for closing said first and second countermoulds with respect to said first and second moulds to define, respectively, a first moulding cavity and a second moulding cavity;
- means of injection and compression of a plastic material within said first and second cavities, respectively, for the moulding of said first component and the overmoulding of said second component;
- and deactivatable contrast means, which are associated to at least said second countermould for maintaining said second cavity in a position of partial opening during injection and compression of said first component within said first cavity, and actuator means for deactivating said contrast means, at the end of the compression of said first component and prior to the compression of said second component within said second cavity.
A process for injecto-compression moulding of articles made of plastic material with two components by means of an apparatus comprising:
- a rotating central element, which bears a first mould and a second mould set opposite to one another;
- a first countermould and a second countermould, which are set on opposite sides with respect to the rotating central element and can be translated with respect thereto;
- and means for closing said first and second countermoulds with respect to said first and second moulds to define, respectively, a first cavity and a second cavity, and wherein said process comprises maintaining said second cavity in a position of partial opening during injection and compression of said first component within said first cavity.
Dependencies are inferred from the claim text.