Crosshead Extrusion, Overview, Functionalities, and Capabilities The crosshead extrusion process, supported by capstans, screw and barrels is comprehensively utilized for the coating of wires and cables using either a polymer or any other similar material. The essential system incorporates pulling of the wire or cable to be covered at a uniform rate employing a crosshead die, where it is coated with liquid plastic. This extrusion cycle for covering is utilized in many wires and cables that are widely used in the telecom, electrical, and electronic industry. For additional coatings, two extruders can also be used supported by capstans, screw and barrels.
What is Crosshead Extrusion? Crosshead extrusion alludes to dealing with a certain type of material or substance, mostly metal or wire, through a "crosshead" and expelling over a substrate. The metal material, for instance, crosses with the melt flow at the top of the extrusion cycle. In this situation, a more modest machine rushes to the side of the essential extruder, by which the progression of plastic is controlled to permit a solid material like a copper wire or some sinewy material to feed into the ‘plastic melt’ turning out to be an important part of the expulsion. Crosshead extrusion is utilized when different materials can't go through the machine's screws and barrels like a chopped fiber set in the masterbatch for supporting properties. There might be single-layer extrusion crossheads, co-expulsion crossheads, or multi-facet extrusion crossheads.
Single screw extruders for wire coating Wire coating is often carried out making use of single-screw extruders wherein the crosshead extrusion takes place. The primary role of the extruder supported by capstans, screws and barrels is to melt the resin and take it to the die maintaining either even or constant temperatures as well as melt pressures as per the requirements. The crosshead extrusion process is performed utilizing general tools and equipment in the line that comprises majorly the following parts: ●
Cooling box for setting the polymeric covering
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Test stations for guaranteeing that the wire is appropriately covered
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Puller for giving consistent strain all through the cycle
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Winder for gathering the final product.
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Unwind station for feeding the line
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Pre-tensioning station for setting the pressure all through the activity
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Preheat station for setting up the wire for covering
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Crosshead die
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Cooling box for setting the polymeric covering
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Test stations for guaranteeing that the wire is appropriately covered
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Puller for giving consistent strain all through the cycle
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Winder for gathering the final product.
Some of the most common polymers used in wire coating applications
Supported by capstans, screws and barrels an extrusion line is capable of processing a wide range of polymers. Some of them include Polyethylene, Polyvinylchloride, Polyamide, Polybutylene terephthalate, Thermoplastic elastomers, Ethylene propylene copolymers, Polypropylene, and Fluoropolymers.
Concluding Remarks Supermac Industries (India) Limited is one of the premium suppliers of manufacturing systems and process technologies including capstans, screws and barrels in India. As a specialist in providing custom-made and cutting-edge solutions, the company has earned a formidable reputation of trust among business leaders and decision-makers across the globe. The company has 3 state-of-the-art manufacturing facilities located at Manesar (Haryana) and New Delhi with a cumulative area of 95,000 square feet.