Injection mould for sawing cord, method to produce sawing cord and the sawing cord resulting therefrom
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United States of America Patent
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Dec 26, 2017
Grant Date -
Dec 25, 2014
app pub date -
Dec 13, 2012
filing date -
Jan 5, 2012
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Abstract
In a sawing cord the three constituting elements of steel cord, sawing bead and sleeve polymer in between the beads must work optimally together. In order to improve the injection molding quality the inventors disclose an injection mold wherein the injection channels inject polymer from opposite sides of the steel cord into the injection cavity. The injection mold comprises two half molds that form the injection cavity when closed. Different preferred embodiments are described inclusive the use of channels having a tree structure, preferably a binary channel tree, preferably a balanced binary tree and most preferred a balanced binary tree with equal length pathways from feed channel to each injection channel. The use of heated channels is disclosed and the rules for balancing between the number of heated versus non-heated channels are explained. Furthermore the method to use such mold and the product resulting from the use of the mold are claimed.
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