SU906983A1 - Apparatus for chopping veneer into match sticks - Google Patents

Description

one

The invention relates to devices for cutting veneer into a match straw and can be used in the production of matches in a section of semi-straw.

A device for cutting veneer on a spun-cutting straw, operating according to the principle of rotary cutting, includes a frame on which feed rollers and copier knives mounted on a rotor in hinged spring-loaded knife holders with rollers and a drive 1 are mounted.

The disadvantage of this device is that a larger number of knives cannot be located on the blade shaft.

A device for cutting veneer into a match straw, including a bed, feed rollers, a shaft with knives, a base plate with an anvil, on the surface of which on both sides of the cutting edge are located protrusions - chippers, pressure plate and drive 2.

The drawback of the device is that the knives of the crest-to-shaft with the slats with the help of 10-12 screws, which almost unevenly clamp the knives due to tightening the screws with different forces, as well as due to the location of the screws with a certain schag. All this leads to a violation of the straightness of the knives.

The blade shaft with a diameter of 600 mm and a length of 900 mm is quite massive, and due to the large weight, at high speeds, there are backlashes in the bearings. In addition, in a 900 mm cutter shaft, it is very difficult to precisely make about 60 slots, and the working gap between the knives and the counter blades should foiTb not more than 0.075 mm. Therefore, under the action of centrifugal forces, as well as strikes of knives on knots, the movement of ala from ala occurs. This leads to the cutting edge of the knife on the counter knife, which leads to their failure. Additional material costs for their replacement and labor costs for their exact installation are required.

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The purpose of the invention is to simplify the design and improve the quality of cutting.

Claims (2)

The goal is achieved by the fact that the device is equipped with a mechanism for the longitudinal tension of knives in the form of supporting and side discs with holes around the circumference of the cutter and knife holders with longitudinal slits, in which the ends of the knives are placed, and in the holes of the side discs the knife holders are mounted the possibility of axial movement by means of nuts, and the side discs are interconnected by a spacer sleeve. FIG. 1 shows the device, a general view; in fig. 2 - knife mounting; in fig. 3 - cutting knife veneer into straw. The device comprises a frame 1 on which a shaft 2 with side discs 3 is installed. The side discs 3 have holes in which the knife holders 4 are mounted with longitudinal slits in which the blades 5 are fixed, the cutting edges of which are placed around the cutting circumference. Each pair of knife holders 4, side discs 3 are mounted on the same axis and, with the help of nuts, has axial displacement, which ensures a high degree of tension and straightness of the knives 5. Shaft 2 is equipped with supporting discs 6, extending between the lateral discs 3, to supporting discs 6, the blades 5 are supported, thereby damping the vibrations of the knives 5, resulting from the impact of shock loads at the time of cutting the veneer into straws. In the plane of the shaft axis 2, there is a base plate 7 with a counter-tool 8 having an edge 9. On the surface of the clamping plate 7 on both sides of the cutting edge 9, protrusions are located - bump bars 10. On the surface of the clamping plate 7 move the veneer 11, which is cut with knives 5 A pressure plate 12 is installed on the match straw and on top of the spike 11. Bottom wheels 13 are placed in the slots of the clamping plate 7 and the veneer 11 is placed on top of it. The side discs 3 are interconnected by a spacer 14 to increase the rigidity of the structure. The device works as follows. The rollers 13 continuously feed the veneer II into the cutting area along the surface of the clamping plate 7, and the plate 12 presses it against the surface of the counter-knife 8 and its edge 9, preventing the veneer 11 from cutting with knives 5 on the match straw at the moment of rotation of the knife shaft 2. For To obtain a quality straw between knives 5 placed around the cutting circumference and the cutting edge 9, a gap of 0.075 mm is provided. The knives 5 are secured in the knife-holder 4 and longitudinally tensioned with nuts, while with their surface they rest on the discs 6. Under the impact of knocks on the knots and centrifugal force, the knives 5 cannot go beyond the cutting circumference, since the knife-holders 4 are set to fit and virtually the gap remains constant in the holes of the side discs 3. The design of the device ensures straightness and reliable positioning of the knives relative to the cutting circumference due to their longitudinal tension and placement in the holes of the side discs fixed data on the ends of the shaft, which in turn prevents the knives from running into the counter knife and increases the reliability of the knives. The design of the device is quite simple. The effectiveness of the proposed device is achieved by reducing the weight of the knife shaft, significantly simplifying the design, and improving the installation and installation of the blades. The invention The device for cutting veneer into a match straw, including a bed, feed rollers, a shaft with knives, a base plate with an anvil, on the surface of which on both sides of the cutting edge there are protrusions - strikers, a pressure plate and a drive, characterized in that simplifying the design and improving the quality of cutting, the device is equipped with a mechanism for longitudinal tension of knives in the form of supporting and side discs with holes around the circumference of the cutter and knife holders with longitudinal slits, in which the ends of ments, and in openings of the side disc knives mounted holders for axial movement by means of nuts, and the side wheels are interconnected by the spacer. Sources of information taken into account in the examination 1. The author's certificate of the USSR N 505616, cl. From 06 F 1/02, 1973. 2. USSR author's certificate If 518486, cl. C 06 F 1/02, 1974. tf g 13 // Si one