Silicone Extruders / Rubber Extruders 5/8" to 4-1/2"

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• Medical tubing 
• Industrial tubing 
• Sheet 
• Profile 
• Rod 
• Wire insulation 
• Many other extrusion applications

• Roll feed has been designed to aid in the feeding of the silicone / rubber strips to the extruder screw. The roll feed has its own drive system that is electronically linked to the extruder screw drive. In some other extruders, a simple gear system drives the roll feed off of the extruder gearbox, which means there is no flexibility. Some have improved by adding a separate drive system, but that type of system has to be re-adjusted every time the screw speed changes. In the Wayne Yellow Jacket system, a trim pot allows the operator to adjust the ratio of the roll speed to the extruder screw speed, which allows the flexibility of changing the ratio while maintaining the ratio when the screw speed changes. 
• Feed sections are available in standard, tangential, and tapered id styles. They are easily changed for different applications. In order to prevent premature heating, the feed sections are water cooled.
• Cast heaters are used in the system for easy maintenance. In other designs, a groove is cut directly in the barrel and copper tubing is wound in the groove. When the tube becomes calcified after some time, a major maintenance problem occurs in the removal and replacement of the copper tubing, which usually must occur off-site. The Wayne Yellow Jacket Silicone / Rubber extruder uses standard type cast heaters to accomplish heating and cooling as necessary. 
• Temperature control is accomplished differently on silicone extruders when compared with rubber extruders. Silicone extruders have cast heaters that surround the barrel. The silicone barrel heaters are not electrically heated, but rather use temperature controlled water from an external source to control the temperature. Rubber extruders come with the same type of heaters, except they are electrically heated and have a panel mounted temperature controller for each zone. In the Rubber extruder, a water cooling system with a solenoid is supplied for each zone, so the panel mounted temperature can supply either electrical heat or water cooling to the zone as required. In this regard, a Rubber extruder is multi-purpose because it can run rubber as well as silicone.
  

• Screws are available in many designs including constant depth variable pitch and different compression ratios depending on the material and the processing needs of the particular extrusion application. The larger screws are water cooled.
• Shape Heads / Dies  can be supplied with a swing hinge and are available as blanks or made to any shape, profile, sheet, crosshead for wire insulation or any other application. 
• No worm drive gearbox - All Wayne extruders use double reduction helical gearboxes for less gear wear, less gearbox frictional heat and more efficient power transmission to the screw. This results in reduced stalling and more stable output as required for laboratory tests and production applications. 
• Industry standard feed end driven screws are used for easy scale up to production machines without translation losses. 
• Since no dynamic seals are required, all the problems that can be caused by them including seal surging, polymer stagnation and degradation and flooding of the gearbox with polymer when the seals wear and fail, are eliminated. 
• Screw break protection and deformation prevention are achieved through the use of high strength screw alloys and advanced electronic torque limiting features of the drive. 
• Yellow Jackets feature a Heavy duty thrust bearing section. Many other lab extruders use only the gearbox bearings to bear the thrust and this leads to premature gearbox failure.
  
• The downstream end of the barrel is supported for strength and die stability during operation. 
• The toothed timing belt drive allows for easy speed range changes when compared to directly coupled motor and gearbox designs.
  

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