Method of making a two-component piston, injection mold for a two-component piston, two-component piston and cartridge
AssigneeMedmix Switzerland AG
InventorsManfred OBRIST, Philipp SEILER, Renato BRUNNER
Life of this patent
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Abstract
A method of making a two-component piston, the two-component piston including a piston cover as the first component and a piston body as the second component. The piston cover is arranged adjacent to the piston body and is configured to be moved relative to the piston body.
Claims4
An injection mold for a two-component piston, the two-component piston comprising a piston cover as the first component and a piston body as the second component, the piston cover being arranged adjacent to the piston body, the injection mold comprising:
- a first mold configured to mold the piston cover, the first mold having a first injection channel being a first point of injection for the injection molding material for the piston cover, the first point of injection being present at a part of the first mold configured to mold a front side of the piston cover;
- and
- a second mold configured to mold the piston body, with the piston cover being a part of the second mold.
A two-component piston for a cartridge comprising:
- a piston cover;
- and
- a piston body, the piston cover movable relative to the piston body, and the piston cover being non-releasably connected to the piston body by a non-releasable connection, the non-releasable connection between the piston body and the piston cover being produced by a part of the piston body that extends through an attachment portion of the piston cover.
A cartridge comprising:
- an outlet;
- a chamber;
- a piston comprising a piston cover as a first component and a piston body as a second component, the piston cover arranged adjacent to the piston body and configured to be moved relative to the piston body, the piston cover and the piston body being formed in an injection mold by an injection molding process, and the piston cover being formed in a first mold of the injection mold, and parts of the first mold specific to a rear side of the piston cover being removed from the injection mold after at least partly curing the piston cover, and the piston cover configured to be used as a part of a second mold for the piston body, the piston being arranged in the chamber;
- and
- a flowable mass arranged in the chamber.
Dependencies are inferred from the claim text.