Holding and supporting components for winding mandrels in plastic film winding machines

Abstract

A holding and support assembly for a winding mandrel in a machine for winding plastic film onto rolls, said machine comprising a winding mandrel positioned between two uprights (12, 13), wherein A first upright (12) carries a rotating plate (14) that cantileverly supports three mandrels (16, 17, 18) and a central shaft (15) that integrally constitute A winding reel, wherein the other end of the central shaft (15) is supported at the second column (13), wherein, corresponding to the free end of the central shaft (15), a star plate (19) is provided, said The star plate has three support arms through each free end of the three mandrels (16, 17, 18) of the corresponding toggle lever mechanism (21, 22, 25) consisting of The actuator (30) is driven and carried on a rod (20) articulated relative to the star plate (19), said rod being in turn driven by another actuator (32) on the corresponding spindle (16, 17 or 18) swings between an operational blocking position for releasing the corresponding mandrel (16, 17, 18) and a rest position.

Description

technical field [0001] The invention relates to a holding and supporting assembly for a winding mandrel in a machine for winding plastic film onto rolls. Background technique [0002] Currently, in the field of machines for winding plastic films onto rolls, various support systems for the mandrel present in each winding reel are used. [0003] This support is typically between a tip and tailstock that are moved axially toward or away from each other in order to axially block or release the mandrel for removal of the spool(s). [0004] A first problem arising from this technique currently used is the loss of time caused by moving the tip and tailstock towards or away from each other in order to load the core and remove the wound bobbin. [0005] The second problem concerns vibrations caused by the end support system between the tip and the tailstock not fully gripping the mandrel and not ensuring a stable axial block. [0006] Another particular problem concerns the possibl...

AI Technical Summary

Problems solved by technology

[0004] The first problem that arises with this technique currently used is the loss of time caused by moving the tip and tailstock towards or away from each other in order to load the core and remove the spool being wound

[0005] The second problem concerns vibrations that result from the end support system between the tip and the tailstock not fully buckling the mandrel and not guaranteeing a stable axial block

[0006] Another particular concern concerns possible buckling that occurs in mandrel arrangements between forward facing end supports

Images