SU1541061A1 - Arrangement for cutting polymeric material - Google Patents

Abstract

The invention relates to the processing of plastics, in particular to the grinding of large-scale production waste for their reuse. The goal is to provide high-quality cutting of polymeric materials. For this, the device is provided with an intermediate support shelf arranged between the horizontal knife and the main cutting comb, the plunger being made with a ledge located under the intermediate supporting shelf with an additional cutting comb fixed on it to interact with the main cutting comb. Tooth cutting combs have a trapezoidal shape. When working, the strip is cut off from the material with knives, and when the plunger is repeated, it is cut into several pieces with cutting combs, which are immediately removed. At the same time, the next strip of material is cut, which remains on the intermediate support shelf. 1 з.п f-ly, 7 ill.

Description

The invention seeks to recycle plastics, in particular to shredding large waste products for reuse.

The purpose of the invention is to provide high-quality cutting of polymeric materials.

Figure 1 shows the device, a longitudinal section in the extreme position of the stroke; figure 2 - the device, a top view in the extreme position of the stroke; on fig.Z - section aa in figure 1; figure 4 - section bb in figure 1; in fig. 5 - 7 - sequential arrangement of the processed material in the area of the knives

and cutting combs at the beginning and end of the work strokes.

The device for cutting polymeric materials comprises a frame 1 on which a stand 2, a tailstock 3, guides 4, a pusher 5 are installed, made with the possibility of reciprocating movement due to links 6, a connecting rod 7, a crank 8, a chain transmission 9, a gear 10 a flywheel 11 with an electric motor 12. On the rack 2 of the bed 1 with two screws fasten the horizontal knife 13 for cross-cutting, underneath the main cutting comb 14 with vertical knives is located. The pusher b is made cutting

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an edge 15 for engaging with a horizontal knife 13. The device also comprises a support shelf 16 located under the pusher 5 and a hopper 17. The device is provided with an intermediate support shelf 18 interposed between the horizontal knife 15 and the main cutting comb 14, which is arranged above the intermediate support shelf 18 by a protrusion 19 with an additional cutting comb 20 attached thereto for engaging with the main cutting comb 14.

The support shelves 16 and 18 are bolted to rack 2. In the support shelf 16, there are rectangular-shaped holes. Tooth cutting combs

14 and 20 are trapezoidal in shape. The length of the support shelves 16 and 18 is longer than the length of the knives 13 and 15 by

two side gaps a. The width of the hopper is 17 N less than or equal to the stroke length K of the pusher 5, and the length M is equal to or greater than the length of the knives 13 and 15.

The device works as follows.

The electric motor 12 is turned on and through the kinematic chain 11, 10, 9, 8, 7, 6 drives the pusher 5 in a continuous reciprocating motion along the guides 4. The material 21 is loaded into the hopper 17, which, under the action of its own weight, returns to the extreme right position falls on the supporting shelf 18 and from it a pair of knives 13 and 15 with the working stroke from right to left (fig.6) cut off the first strip 22 and collide downwards with a knife

15c shelves 18 on the ledges 19 additional cutting comb. Upon subsequent return of the pusher 5 to the extreme right position (Fig. 7), the remaining piece of material 21 falls on shelf 18, and the first cut strip of material 22 faces down from the projections 19 of the support shelf 18 to the support shelf 16. During the next working stroke of the pusher 5 (Fig. 1) from the remaining piece of material 21, knives 13 and 15 cut off the second strip and collide downwards from the base plate 18 onto the projections 19, and the first strip 22 lying on the shelf 16 is cut by knives 14

and 20 into several pieces, some of which with knives 20 protrude through the grooves between the knives 14 into the receiving bin, and the remaining pieces fall into the receiving bunker through the holes in the support shelf 16. The described cycle repeats continuously and the material 21 is fully processed

passes through the device. The material 21 is loaded into the hopper 20 alternately after the crushing of the previous piece has been completed.

The proposed device allows several times to increase the productivity of cutting material by using cutting dies and automate the supply of material to the zone.

cutting due to the stepped arrangement of the knives of the cutting combs and support shelves in which the material moves in the device under the action of its own weight without

the fate of the worker, which ensures safe working conditions.

Claims (2)

1. A device for cutting polymeric materials, comprising a frame with a horizontal cross-cutting knife fixed on it and a main cutting comb with vertical blades located under it, a hopper mounted with a reciprocating pusher with a cutting edge for engagement with a horizontal knife, support shelf, located under the pusher, about t l and to improve the cutting performance of polymeric materials, it is provided with an intermediate support shelf located between the horizontal knife and the main cutting comb, the plunger is made with a protrusion located under the intermediate support shelf with an additional cutting comb fixed to it for interacting with the main cutting comb. 2. The device pop.1, about tl and 55 Like the fact that the teeth of the cutting combs have a trapezoidal shape.  g stf 1901VSI qot / gz U //// 77/7 / 7U //////// 7/77 ////// // A CpU2. four / TO TG I  20 16 / at 19 $ ig.5 22 t-Ј; sLA VL XZ & FIG. 6 7