Method for injection moulding an external housing of an object, object and apparatus for injection moulding

摘要

A method for injection molding an external housing of an object including an electronic assembly includes interposing the assembly between a first half-mold and a second half-mold of an open injection mold and closing the first half-mold and the second half-mold to define an injection cavity containing the assembly. Plastic is injected in the cavity to mold said external housing. The step of interposing includes positioning, before the injection of plastics, the assembly on movable support means associated with the mold, the support means being arranged on an extended position, and disengaging the support means from the assembly before the plastic is cured such as to manufacture the external housing in an only one shot manufacturing process. This way, plastic of the external housing is integrally molded and devoid of discontinuity points.

主权项

1. A method for injection moulding an external housing of an object provided with a mounting through hole, in particular a high temperature or harsh environment RFID tag or wireless device, said object comprising an electronic assembly provided with a further mounting through hole; said method comprising the steps of:
interposing said electronic assembly between a first half-mould and a second half-mould of an open injection mould; closing said first half-mould and said second half-mould to define an injection cavity of a mould, containing said assembly; and injecting plastics in said cavity wherein said interposing step comprises positioning said assembly on movable support means in an extended position, said support means being associated with said mould, the method further comprising the step of disengaging said support means from said assembly before said plastics are cured such as to manufacture said external housing in only a one shot manufacturing process, plastics of said external housing being integrally moulded and devoid of discontinuity points, wherein the method further comprises: providing an injection nozzle on a protrusion of a half-mould facing a further protrusion provided on the other half-mould and defining an injection sprue volume therebetween; and positioning said injection sprue volume inside said further mounting through hole for injecting said plastics from said injection sprue volume towards said first half-mould and said second half-mould at the same time, such that said further mounting through hole is encapsulated with plastics, thus creating said mounting through hole during injection.