Guill Tool: New extrusion flow valve

A new patent-pending valve from Guill Tool and Engineering Co., the Multiflow valve, offers outstanding productivity and cost-savings benefits to manufacturers that require the extrusion of complex multi-layer tubing. The Multiflow valve allows extruders to manufacture either three-layer or up to five-layer tubing products with the use of fewer extruders. In the three-layer configuration, the proprietary valve is designed for use with all ABA crossheads or inline dies. Using this superior technology, plastic or rubber material is fed from the ‘A’ extruders and divided inside the manifold in order to form both the inner and outer layers of the final product. “The obvious cost savings are considerable,” said Jim Prue, Chief Design Engineer for Guill. “For example, a manufacturer is now able to make a three-layer product by using only two extruders, saving substantially on required outlays for capital equipment.” Other advantages include; the abilitiy to change layer-wall thickness without shutting down the extruder; eliminates ‘dead’ areas in the manifold that would lead to degradation of the material and contamination of the tubing; and it allows a wide range of wall thicknesses.

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