Method for encapsulating with plastic
AssigneeMarquardt GmbH
InventorChristoph STIER
Life of this patent
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Abstract
The invention relates to a method for encapsulating an element with a body of plastic. The element is placed into a cavity in an injection mold and fixed therein by means of a movable retaining pin. Then the plastic is injected into the cavity. Subsequently, the retaining pin is moved away from the element after filling of the cavity and while the plastic is still in a plastic state so that plastic can subsequently flow into the volume vacated by the retaining pin, to produce a kind of weld line in the region of the fixing on the body. Then, the retaining pin is moved back in the direction of the element while the plastic that subsequently flowed into the volume is still in a plastic state so that a kind of compression of the plastic takes place in the region of the fixing on the body.
Claims19
A method for encapsulating an element in a body of plastic, comprising:
- placing the element into an injection mold that has a cavity, the element being fixed in the cavity by means of a movable retaining pin;
- injecting a plastic into the cavity;
- moving the retaining pin away from the element after filling of the cavity with the plastic while the plastic is still in a plastic state in such a way that the plastic can subsequently flow into a volume vacated by the retaining pin, and
- moving the retaining pin back in the direction of the element while the plastic that has subsequently flowed into the volume is still in a plastic state in such a way that a kind of compression of the plastic takes place in the region of the fixing on the body.
A subassembly comprising a body of plastic and at least one element that is embedded in the body of plastic by encapsulation, the element being fixed during the encapsulation with the plastic by means of a movable retaining pin, which is moved away from the at least one element after encapsulation, wherein the plastic that subsequently flowed into a region of the fixing on the body at least one of during and after the moving away of the retaining pin is then compressed.
Dependencies are inferred from the claim text.