DE4333849A1 - Two-chamber cutting system for comminuting mills for foamed material - Google Patents

Abstract

The invention relates to a cutting system which particularly economically comminutes foamy plastics/rubber, in one operation, on a machine. The two-chamber system operates vertically. Upper, oblique/V-cutters, the drive shaft, flywheel and internal cutter form a unit. The two-chamber system is formed by a horizontally installed separating grate/partition. The material to be cut passes through the feeding funnel into the prechamber, is grasped there by the oblique/V-cutters and pre-comminuted to a size which fits through the separating grid lying therebeneath and in this manner is drawn into the lower cutting chamber. Here, the material is cut by the main cutter to the size which passes through the hole size of the screening plates revolving through 360 DEG . The two-chamber cutting system prevents the cut material from being compressed in the lower cutting region, which would necessitate an increased outlay on energy. All of the conventional cutting systems have been analysed. This invention provides a system of superior cutting geometry. Extensive safety devices are, of course, also installed.

Description

The invention relates to a novel cutting system, which the shredding of foam-like plastics / rubber, in one Operation on one machine, without pre-shredding on egg ner other machine, particularly economically possible, ent speaking the preamble of claim 1.

This two-chamber system according to the invention operates vertically. It consists of a stator and split into two levels a rotor which is arranged by knives arranged one above the other is marked.

The stator consists of 360 °, perforated seven. These offer the largest possible delivery areas and he possible fast-running regrind. The sieves can enclose both cutting chambers in height. Through the Sieves are radial slots, through which knives are inserted and fastened, so-called outer knives.

The rotor consists of a vertically arranged shaft, on which a flywheel is stuck at the lower end is. This wave can also be a vertical one from below motor screwed against the base plate. There are knives on angles or columns on the flywheel mounted, (inner knife) which in the lower cutting chamber reach in and cut against the outer knife. On the top end of the shaft is a bevel or V-knife mounted, which extends into the upper cutting chamber. The height of this knife can be varied using spacers become.

Above the top edge of those mounted on the flywheel Inner knife, is horizontal from the inside against the stator, ei ne coarse-meshed inner wall interchangeably mounted through which the two cutting chambers result. The stitches in the interior Partition wall, can be polygonal or round. The stitches size can be selected depending on the type of material to be processed become.  

The oblique / V-knife can now do this from above in the filler funnel inserted material to be shredded and so that it fits through the mesh and falls into the lower chamber. Here it is from those on the Flywheel mounted internal knives finally crushed. The shredded material is now through the 360 ° rotating Sieves ejected. The holes in the seven can be round or be angular and variable in size. The size of the holes determine the grain / flake size of the regrind.

The screens can be installed interchangeably.

The upper chamber can also be smaller or larger than the lower one Chamber be constructed.

The above-described invention offers much cheaper Relationships with regard to energy requirements and performance as al le previously known cutting systems. Machines with this Two-chamber cutting systems are also very economical put.

Exemplary embodiments are shown in the accompanying drawing. The aforementioned tasks are achieved by the in the patent say 1 to 5 features described in an excellent manner solved.

Claims (5)

1. Two-chamber cutting system for foam grinding machines, which enables the shredding of foam-like plastics / rubber, in a single operation on one machine without pre-shredding on another machine, particularly economically, characterized in that the chambers are arranged vertically one above the other and by a horizontal, interchangeable one built-in partition / partition grille, through which the pre-shredded material falls into the main cutting chamber. 2. Two-chamber cutting system according to claim 1, characterized, that the upper chamber by one or more oblique / V-knives, which is attached to a vertical shaft (motor shaft) are, the pre-shredding takes over. 3. two-chamber cutting system according to claim 1, characterized, that the lower chamber by knife, which we on one flywheel are built, related with the outer knives, the final shredding. 4. two-chamber cutting system according to claim 1, characterized, that the chamber wall (stator) made of 360 ° rotating sieve plates consist. This is particularly fast drainage of the Given material to be cut. 5. two-chamber cutting system according to claim 1, characterized, that this is also inclined on the base plate mon can be tiert.