The heart of any extruder is its screw. The screw, driven by a motor acting through a reduction gear box rotates in the barrel. The raw material, usually in granular form, drops from the feed hopper into the screw, more specifically into the spiral groove defined between the screw flights, the root of the screw
Controlling Barrel and Screw Wear is Critical The premise that screw design is the most critical element in achieving the best melt for the process is only partially true. It is the entire plasticating unit that effectively melts, mixes and ultimately moves the flow through the die-head. The material of construction is equally important to
Tension Control: A dancer is one system that can be utilized for tension control, however it is typically used for compensation rather than true control. A mechanical spring or air pressure setting is typically utilized causing the dancer arm to move up and down with the changes in material tension causing compensation for the varying
The purpose of the payoffs used in insulating lines is to provide a continuous supply of wire to the downstream machinery. Wire may be paid off from stands from which wire is uncoiled or from reels either driven or undriven. Single conductor and tandem insulating line payoffs are often undriven. When this is the case,
