sprue bushing using 4 bolts: used for machines up to 350 tonssprue bushing using 2 bolts: used for air on 200 tonsThe sprue is the connection between the machine's nozzle, and plastic channels, has the task of bringing the line of plastic from the machine's nozzle to the runner or directly to the Cay Sprue bushing spray bench system, often used for ease of replacement bushing sprue and machining.
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