STATIONARY IDLER ROLL WITH LOW COEFFICIENT FRICTION

摘要

An idler roll employed in a blown film extrusion line is non turning and a plurality of wear strips are removably attached to the idler roll at circumferentially spaced positions around the idler roll. The wear strips engage blown film passing over the idler roll. The wear strips have reduced coefficients of friction than that of the idler roll, have high wear resistances and the blown film passing over the wear strips cleans and polishes the surface area of the wear strips the film moves across, substantially making the wear strips and the non turning idler roll maintenance free compared with idler rollers with bearings.

主权项

1. An idler roll configured to engage in sliding engagement with and redirect a length of film moving across the idler roll, the idler roll comprising:
a base having a generally cylindrical exterior surface with a center axis that defines mutually perpendicular axial and radial directions relative to the base, the base having an axial length with a base first end and a base second end at opposite ends of the axial length of the base; a plurality of wear strips, each wear strip having a length between one end of the wear strip and a second end of the wear strip, each wear strip being configured for removable attachment to the base by inserting the one end of the wear strip at the base first end and then sliding the wear strip along the axial length of the base to the base second end.