Piston for extruding material from plastic bags - has supporting member extending radially from scraper edge to piston centre

摘要

A supporting member (14) extends in the radial direction from the scraper edge (13) to the centre of the piston (9). There can be a gap(s) in the radial direction between the scraper edge and the member outer edge. The member can be adjustable in the axial direction in relation to the piston, and it can be disc-shaped. The scraper edge can consist of evenly-spaced segments. USE/ADVANTAGE - For substances used in buildings, vehicles, ships, aircraft, machinery, instruments etc.. No trapping of bag between piston and cylinder wall, and avoids heavy friction between them.