Hancock Engineering offers a wide range of extruders for the polymer and rubber industry which are custom designed for each specific application.

Hot Feed Extruders - Hancock Engineering designs and manufactures extruders that receive the hot rubber compound from a batch mixer system, a continuous mixer or in the form of a strip coming from a mill. For batch mixer fed applications, the typical extruder sizes fall in the range of 6" (150 mm) to 24" (600 mm) screw diameters

Cold Feed Extruders - For cold strip feed, the extruder sizes offered range from 3 ½" (90 mm) up to 12" (300 mm) including straight, vented and pin barrel extruders.

Pin Barrel Extruders - Pin Barrel Extruders are utilized for the production of tread lines and tires, profiles hoses, cable and sheets. The variably placed pins, arranged in a radial pattern around the screw, provides effective stream splitting of the compound material without excessive compound temperatures.

• Cold Feed, Hot Feed, Pin Types, Strainers, Preformers
• Disassembly, sandblasting, inspection & magnifluxing
• Rebuilding gear reducer: install new bearings, new oil seals, new gearing - if needed, etc.
• Installing rebuilt or new ac/dc variable speed motor.
• Specifying and installing new VFDs (Variable Frequency Drives)
• Specifying and installing new variable speed SCR drive (Analog or Digital).
• Specifying and installing new bimetallic liner 58-60 R or hone existing liner.
• Rebuilding stock screw with stellite and grind OD to new clearances.
• Designing new stock screw/barrel to specifications.
• Installing new rotary joint with new spray pipe for screw cooling.
• Hydrostatic pressure testing of cooling jackets.
• Priming & painting to color specifications with anticorrosive paint.
• Supplying new or re-engineered head to customer's process specifications.
• Installing new HMI operator station with start, stop, speed compensation/indicator, reversing, temperature indicators, etc.
• Specifying and installing power roll feeding system, new or rebuilt.
• Supplying vacuum capabilities.
• Breaker plate and filtering capabilities.
• Specifying and installing new temperature control units "TCU's"
• Test running complete system under power, is available.
• We also supply other accessories for general extrusion and hose making, such as: screen changers, take-up & let-off conveyors, laser gauging devices, continuous vulcanizing lines, winding units, cooling units, autoclaves, etc.