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AssigneeNV Bekaert SA
InventorsDieter Ghillebert, Raf Clauws, Tom Baekelandt
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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.
A mould for coating a sawing cord with a polymer by injection moulding comprising a first half-mould and a second half-mould, said first half-mould and said second half-mould forming an elongated injection cavity when united, said injection cavity having a central axis, said first half-mould and said second half-mould being provided with injection channels for injecting polymer into said injection cavity, said injection channels being situated at opposite sides of said central axis,
Dependencies are inferred from the claim text.