Patent ID: 9573188
Date: 2017-02-21
CPC Classifications: B22C,B22D

Claim:
1. A method for producing a feeder configured for use in a casting mold used for casting metals, wherein the feeder has a feeder body enclosing a feeder cavity, wherein the feeder body has a base region with a through opening for connecting the feeder cavity to the casting mold, wherein the feeder body consists of an exothermic material and is enclosed at least partially on an outer side at least by an external shell consisting of insulating refractory material, and wherein the feeder is provided with a feeder foot arranged externally in the base region and having an opening flush with the through opening, wherein the feeder body produced in a first step from an exothermic material is placed together with the feeder foot associated with the base region into an injection mold having a mold cavity, wherein the feeder body and the feeder foot form the external shell that is placed in the mold cavity of the injection mold, wherein the feeder body and feeder foot are injected simultaneously with the insulating material, wherein the feeder body including the feeder foot is positioned in such a manner that the insulating material injected into the mold cavity of the injection mold fills in a gap left between the feeder foot and the base of the mold cavity at least one part of the circumference of the feeder foot and extending over at least a part of the height of the feeder foot, and the injected external shell thereby extends at least partially under the feeder foot with the exception of its opening and is attached to the base region of the feeder body without the use of auxiliary means.