Machine for obtaining a bi-material part
AssigneeCVA Technology Pure Silicone Group AG
InventorNicolas Oternaud
Life of this patent
Estimating the term…
Abstract
A machine including a mold which delimits an overmolding cavity, for receiving a hollow portion of a bi-material part, cooling means along the overmolding cavity, a core positionable inside the hollow portion and containing heating means for bringing the core to a heating temperature higher than 150° C., and an injector injecting an overmolding material, formed by the core and the hollow portion, for forming an inner portion of the bi-material part. In order to obtain the overmolded inner portion even if the hollow portion has poor heat resistance, the cooling means maintain the overmolding cavity at a cooling temperature lower than 110° C. while the core is brought to the heating temperature, while the overmolding material has been injected by the injector into the overmolding cavity.
Claims11
A machine for obtaining a bi-material part, comprising:
- a mold delimiting an over-molding housing configured to receive a hollow part of the bi-material part;
- a cooler arranged along the over-molding housing;
- at least one core, at least one part of which is positionable within the hollow part when the hollow part is received within the over-molding housing, wherein the at least one core comprises a heater for heating the machine, wherein the heater brings the at least one core to a heating temperature greater than 150° C.;
- and
- an injector configured to inject an over-molding material into the over-moulding housing via said mold when the over-molding material is in an injectable state, such that the over-molding material enters the over-molding housing to be shaped radially inward by said at least one core and radially outward by the hollow part, so as to form an inner part of the bi-material part over-molded over the inside of the hollow part, wherein said cooler keeps the over-molding housing at a cooling temperature of less than 110° C., while said at least one core is brought to the heating temperature by said heater in order to transition the over-molding material from the injectable state to a crosslinked state when the over-molding material has been injected into the over-molding housing by the injector.
Dependencies are inferred from the claim text.