Administering device with a multi-component injection-molded housing
First Claim
1. A method of producing an administering device for infusing or injecting a liquid medicament, comprising:
- providing an injection mold which defines a first housing shell, wherein the first housing shell is configured to accommodate components which comprises a receiver for the liquid medicament, a conveying mechanism, and a control element, wherein the first housing shell defines a first opening, a second opening for the control element, a third opening through which the components are inserted in the first housing shell when the administering device is assembled, and a seal gap which extends around the third opening;
providing to the injection mold, a pre-molded insert part which forms a transparent, watertight wall region made from a first plastic material;
injecting into the injection mold a different, second plastic material so that the first plastic material and the second plastic material are joined to together along an edge of the first opening in a watertight fit by an injection mold formed seal, wherein the first opening is closed by the pre-molded insert part and the second plastic material forms side walls of the first housing shell;
providing the components in the first housing shell through the third opening;
injecting into the injection mold onto the second plastic material a different, third plastic material so that the third plastic material and the second plastic material are joined together along an edge of the second opening in a watertight fit by an injection mold formed seal, wherein the third plastic material forms a flexible, watertight wall region which closes the second opening and overlaps the control element;
providing a dimensionally stable support structure having an anchoring element to the third opening of the first housing shell; and
injection molding a thermoplastic elastomer over the dimensionally stable support structure to form a second housing shell which surrounds the anchoring element and into the seal gap of the first housing shell both to close the third opening and form a seal therebetween with a formed sealing lip such that the first housing shell and second housing shell are connected in a watertight fit.
3 Assignments
0 Petitions
Accused Products
Abstract
Method of producing an administering device for infusing or injecting a product, whereby in order to mold a housing shell serving as a case for components of the administering device in a multi-component injection molding process at least one pre-molded, transparent insert part made from a first plastic material is inserted in an injection mold molded to a shape matching the shape of the housing shell, a dimensionally stable, curable second plastic material is injected into the injection mold around the insert part to render it watertight and an opening left free in the second plastic material is closed to render it watertight by injecting on an elastomeric third plastic material.
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Citations
20 Claims
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1. A method of producing an administering device for infusing or injecting a liquid medicament, comprising:
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providing an injection mold which defines a first housing shell, wherein the first housing shell is configured to accommodate components which comprises a receiver for the liquid medicament, a conveying mechanism, and a control element, wherein the first housing shell defines a first opening, a second opening for the control element, a third opening through which the components are inserted in the first housing shell when the administering device is assembled, and a seal gap which extends around the third opening; providing to the injection mold, a pre-molded insert part which forms a transparent, watertight wall region made from a first plastic material; injecting into the injection mold a different, second plastic material so that the first plastic material and the second plastic material are joined to together along an edge of the first opening in a watertight fit by an injection mold formed seal, wherein the first opening is closed by the pre-molded insert part and the second plastic material forms side walls of the first housing shell; providing the components in the first housing shell through the third opening; injecting into the injection mold onto the second plastic material a different, third plastic material so that the third plastic material and the second plastic material are joined together along an edge of the second opening in a watertight fit by an injection mold formed seal, wherein the third plastic material forms a flexible, watertight wall region which closes the second opening and overlaps the control element; providing a dimensionally stable support structure having an anchoring element to the third opening of the first housing shell; and injection molding a thermoplastic elastomer over the dimensionally stable support structure to form a second housing shell which surrounds the anchoring element and into the seal gap of the first housing shell both to close the third opening and form a seal therebetween with a formed sealing lip such that the first housing shell and second housing shell are connected in a watertight fit. - View Dependent Claims (2, 3, 4, 6, 7, 8, 9, 10, 11, 12, 13)
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5. The method as claimed in 4, further comprises providing the control element as a push button.
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14. A method of producing an administering device for infusing or injecting a liquid medicament, comprising:
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providing a first housing shell, wherein the first housing shell comprises; a receiver for the liquid medicament, wherein the receiver comprises a first opening for receiving the liquid medicament, a conveying mechanism configured to convey the liquid medicament in a forward drive direction, a second opening at a terminal end of the first housing shell, and a seal gap which extends around the second opening at the terminal end of the first housing shell; providing a dimensionally stable support structure having an anchoring element to the second opening of the first housing shell; injection molding a thermoplastic elastomer over the dimensionally stable support structure to form a second housing shell which surrounds the anchoring element and into the seal gap of the first housing shell both to close the second opening and form a seal therebetween with a formed sealing lip such that the first housing shell and second housing shell are non-detachably connected in a watertight fit. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification