DE7134298U - Device for cutting workpieces made of elastic material - Google Patents

Description

PATENT LAWYERS

DR.-ING. BY KREISLER DR.-ING. SCHDNWALD DR.-ING. TH. MEYER DR. FUES DIPL.-CHEM. ALEK FROM KREiS ¹ ER

DIPL.-CHEM. CAROLA KELLER DR.-ING. KLDPSCH

DIPL.-ING. SELTING COLOGNE 1, DEICHMANNHAUS

8.9.I97I

Sch / Sd Fecken-Kirfel KG Maschinenfabrik, 5I Aachen, Coebbelgasse 1-15

Device for cutting workpieces made of elastic material

The invention relates to a device for cutting of workpieces made of elastic material, e.g. of blocks made of foam or the like., in layers by means of a ribbon-shaped cutting organ.

When cutting blocks of foam or the like. in It is common to have multiple layers of foam layers to be stacked on the block, i.e. the separated layers remain on top of each other. To enable stacking, is a special version of the rear part of the bench knife guide required because when the band knife returns with the guide, the rear edge of the guide on the The height of the cut surface of the block must be. For the Cutting thin layers requires that

Band knife and thus the knife guide must be set in an inclined position in order to achieve a dimensionally accurate thin layer received, while with thick erect the BandiT.sc scr rr.it the knife guide is arranged horizontally. For the return of the band knife guide this receives a backward one Wedge piece in order to be able to accomplish the stacking of the cut layers. If the knife guide is inclined, the rear edge of the Leadership set a special profile. It is also known to use a hinge with the rear wedge to connect the knife guide and with respect to this angle adjustable close. In this training the band knife guide the stacked layers do not come to the deposit with their end faces vertically on top of each other, Instead, the layers cut by the inclined knife come into the stack in a stepped offset. The inclined stack is created by friction and deformation on the lower foam block. This brings the cut one Do not lay the layer on the front surface of the foam block. This is the stack height limited. The further processing with vertical cuts leads to not inconsiderable material losses. The known Knife guides have two edges that reduce friction and deformation of the lower foam block on the Cause cut surface.

The object of the invention is the band knife guide so to train that a clean and exact stacking of the cut layers is achieved and the friction of the Knife guide on the foam block is significantly reduced. The invention is notable for a knife guide with a rear wedge from the fact that cutting organ guide and rear wedge as rigid unit are rotatably mounted.

Such a rotatability of the knife guide together with the rear wedge as a whole, the friction of the

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On the one hand, one and the same knife guide can be used to make thin and thick layers with a suitable incline for cutting thin layers the same device. On the other hand, the disadvantages that otherwise arise are also imprecise Stacking of the cut layers switched off. At the The cutting process only touches the leading edge of the sea or the knife guide the cut surface of the foam blouse. When the knife guide moves back through the cut stack of layers, the knife guide only touches the sonity surface with the rear edge by rotating it accordingly. before de »ochaumstoffblockes. The foam block is much less blown, which in particular is eui ami ΞΰάΖϋ-n <? 'of the work processes is important because it creates a stepped offsetting of the stacked layers is avoided. This makes it higher and almost vertical Stacking of the layers possible. In addition, the tolerances of the cut layers are smaller because of the whole Average of the knife guide can be used as load-bearing.

The pivot point door the pivoting of the rigid knife guide ^ unit is located at or close to the Zweckmirij Cutting organ cutting edge, thereby precise cutting of the foam block possible in both thin and thick layers.

It is also advantageous if the rigid guide unit 2JC is provided so that it can be raised or ventilated somewhat. This applies to

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the return of the knife guide through the stack. This guarantees that only the The rear edge of the knife guide can touch the lower cut surface of the foam block.

The invention is explained below with reference to an exemplary embodiment shown in the drawing.

Fig. 1 illustrates an embodiment of the cutting device according to the invention in side view, partly in section, schematically.

Fig. 2 shows the cutting device of Fig. 1 in the position of the return of the knife guide.

For dividing the foam block i, which is in the arrow direction 2 is advanced, a knife guide 3 disnt, in which a rotating band knife 4 with the exception of the front Cutting edge protrudes. The knife guide 3 consists of the actual cutting element guide 5 and the rear one Wedge piece 6, which parts form a rigid unit. Cutting element guide and rear wedge are preferred formed in one piece. The rigid knife guide unit is rotatably mounted as a whole, which is ensured by the Ball bearing 7 is indicated. Here is the: pivot point 8 at or near the cutting edge of the band knife 4, At the same time the band knife guide 3 is with the storage 7 provided that it can be raised or ventilated somewhat in the vertical direction.

When cutting, i.e. when advancing the cutting device; only touches the band knife 4 and the front edge 9 of the | lower cut surface of foam block 1. When back!

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run the knife guide 5 under the stacked layers 11 only touches the rear edge 12 of the lower cut surface IO of the foam block, Ea only one edge of the Blade guide with the cut surface 10 of the foam block 1 in contact, whereby a deformation of the block is switched off in the end zones.

7134238 -5.4.71

Claims (4)

- 6 claims 1. Device for cutting workpieces made of elastic material, e.g. blocks made of foam or the like., in layers by means of a band-shaped cutting element which is guided in a guide with a rear wedge is arranged, characterized in that the cutting element guide (5) and rear Ke ^ .lstück (6) as a rigid Unit (3) are rotatably mounted. 2. Apparatus according to claim 1, characterized in that the pivot point (8) for the rotational pivoting of the rigid Unit (3) is arranged at or near the cutting edge of the cutting element (4). 3. Device according to claim 1 or 2, characterized in that da-3 the rigid guide unit (3) can be lifted or ventilated is provided. 4. Device according to one of claims 1 to 3, characterized characterized in that the cutting element guide (5) and the rear wedge piece (6) are formed in one piece.