Method of and apparatus for producing injection-molded parts
AssigneeKrauss-Maffei Kunststofftechnik GmbH
InventorEric Schieberl
Life of this patent
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Abstract
In a method of producing injection-molded parts, an injection mold has two mold halves and a melt feeding device for application of melt across the mold surface of a mold half, when the injection mold is open. The melt is pressed into all areas of the mold cavity, when closing the mold halves. In order to simplify the arrangement of the hot runners in the mold half, when different injection-molded parts are produced, it is proposed to apply the melt onto the mold surface by a hot runner plate which is positioned above the mold surface, whereby the hot runner plate has several melt nozzles in the form of needle seal nozzles which are operated and controlled depending on the profile required for the respective mold half.
Claims16
A method of producing injection-molded parts in an injection molding machine with an injection mold having two mold halves, with melt being applied onto a mold surface of one of the mold halves by a melt feeding device positioned above the mold surface, when the injection mold is open, and with the melt subsequently pressed into all areas of a mold cavity by closing the mold halves after removal of the melt feeding device, wherein the melt is applied onto the mold surface by a single hot runner plate positioned to cover the entire mold surface of the one mold half, wherein the hot runner plate has a plurality of melt feeding nozzles, wherein the melt feeding nozzles are configured as individually controllable needle seal nozzles.
A method of producing injection-molded parts, comprising the steps of:
- moving a single hot runner plate to an operative position in which an entire mold surface of a first mold half of an injection mold is covered;
- applying melt across the mold surface of the first mold half via a plurality of individually controlled nozzles of the hot runner plate;
- removing the hot runner plate from the operative position while moving a second mold half into the operative position above the first mold half;
- and moving the mold halves together to thereby compress the melt between the mold halves.
Apparatus for producing injection-molded parts, comprising:
- an injection mold having two mold halves;
- and
- a melt feeding device for supply of melt across a mold surface of one of the mold halves, wherein the melt feeding device includes a single hot runner plate movable into an operative position above the one mold half and configured to fully cover the mold surface of the one mold half, wherein the hot runner plate has a plurality of melt feeding nozzles which are configured as individually controllable needle seal nozzles.
Dependencies are inferred from the claim text.