RU2127340C1 - Device for cutting out piles of spread materials - Google Patents

Abstract

FIELD: mechanical engineering. SUBSTANCE: this relates to equipment intended for cutting out fabrics and similar materials which are used in clothing, shoe-making and other industries. In device, cutting out blade is made in the form of tensioned string with cutting coating for example including particles of high-alloy abrasive material which are actually cutting members. Cutting string is wound over spiral grooves of power-driven drums. Drums are located at both sides of spread piles. Ends of tensioned string are secured on corresponding drums. Drums are installed for possible synchronous reversible rotation in supports of carriage which in its turn is installed for possible movement across spread piles along guide members of other carriage which can move along spread piles of material over stationary guide members. Aforesaid embodiment of device is characterized by simple design and it can be efficiently used for cutting out standard materials and materials with high resistance to cutting. EFFECT: higher efficiency. 1 cl, 2 dwg

Description

 1. The technical field to which the invention relates.

 The invention relates to equipment for cutting (cutting) flooring cloths and similar materials.

 2. The prior art.

 Known cutting devices - machines in which the cutting of decking is made with a rectangular pointed closed tape (Anastasiev AA "Machines, automatic machines and automatic lines of light industry." - M., Light Industry, 1983).

This design cannot be used for automated cutting of decks due to the need to orient the knife in a tangent to the cut contour and, accordingly, the inability to rotate the machine with a tape knife at significant angles, and even more so 360 ^o around the cutting edge of the knife. In addition, the knife-tape due to significant friction on the material and rapid wear (dulling) is not suitable for cutting materials with high resistance to cutting.

 Also known are machines and cutting heads used in automated cutting units, in which cantilevered rectangular pointed knives are used as a working tool (Cutting machine according to USSR copyright certificate N 835917, class D 06 H 7/00, publ. 07.06.81). In such units, the knife, in addition to the oscillatory movement along the cutting edge, makes movements according to specified programs along and across the deck and rotates around the axis (3 programs).

 This design of the cutting device provides programmed cutting of flooring, however, it retains the above disadvantages in relation to hard-to-cut materials. The units and the cutting head itself have a complex structure due to the need for a three-program knife movement.

 3. The essence of the technical solution.

 A device for cutting flooring of material webs, including a cutting knife, a conveyor belt for arranging the floor, a vacuum device for sealing the floor, carriages for moving the cutting knife along and across the floor, and a presser foot. In this case, the cutting knife is made in the form of a stretched string with a cutting coating, for example, particles of carbide material - abrasive, which are cutting elements and which are wound on the helical grooves of the driving drums located on both sides of the deck, and the ends of which are fixed to the respective drums. The drive drums are mounted with the possibility of synchronous reverse rotation in the supports of the carriage, which, in turn, is mounted with the ability to move across the deck along the guides of another carriage, which is mounted to move along the deck along the fixed guides.

 The proposed cutting device significantly reduces the disadvantages of the known cutting devices.

 The design of the string knife allows you to cut both ordinary and materials with high resistance to cutting. Compared with a knife of automated cutting units, the proposed knife has a simpler movement along its axis. There is also no need to rotate the knife around the axis, i.e. instead of three movement programs, two are enough. All this allows to significantly simplify the design of cutting devices.

 4. The list of figures of the drawings.

 In FIG. 1 shows a diagram of a cutting device.

 In FIG. 2 - view - section along aa.

 5. Information confirming the possibility of carrying out the invention.

 To locate the decking being cut 1, a closed tape 2 is used, stretched over the drums 3. One branch of the tape 2 bends around the drums 4, so that a gap is formed across the deck, and the drums are mounted for free rotation in the supports of the carriage 5. The carriage 5 is mounted for movement along the deck 1 along the fixed guides 6 and has for this a drive mechanism for programmed movement (not shown in FIG. 1). On the guides 7 of the carriage 5 is mounted with the possibility of movement across the floor of the carriage 8, for which the drive mechanism (not shown in figure 1).

 In the supports of the carriage 8, on both sides of the deck 1, drums 9 and 10 are mounted. The upper drum 9 is connected to the lower backlash-free transmission 11 (for example, gear-belt). The drive 12 serves to communicate the reverse rotation to the reels 9 and 10. The ends of the string knife 13 are mounted respectively on the reels 9 and 10. The knife 13 itself is located in the helical grooves of the reels 9 and 10, and its working part is located in a tense state between the reels 9 and 10 and passes through the gap formed by tape 2. A vacuum device (not shown in FIG. 2) with vacuum suction 14 and 15 is used to seal the flooring. Presser 16 serves to clamp the flooring at the knife 13.

 The device operates as follows. The flooring 1 of the material webs is located on the tape 2 and is sealed with vacuum pumps 13 and 14. The presser foot 16 is located on the floor. The carriage 5 receives movement along the deck 1 in accordance with the cutting program. In this case, the drums 9 and 10, rotating, inform the working part of the knife 13 movement along its axis and, at the same time, due to the helical grooves on the drums, movement across the flooring in one direction or another in accordance with the cutting program. Changing the direction of movement of the knife 13 across the deck is carried out by changing the direction of rotation (reverse) of the reels 9 and 10. In sections of the floor 1, where the speed of movement of the knife across the deck should be zero, the carriage 8 receives movement across the floor 1 in the opposite direction to the direction of movement knife 13 and the same amount.

Claims (2)

 1. A device for cutting floorings of material webs, including a cutting knife, a conveyor belt for positioning the flooring and a carriage for moving the knife along the flooring along fixed guides, characterized in that it has a vacuum device for sealing the flooring and the presser foot-rail, and the cutting knife is made in the form of a stretched string with a cutting coating, the string is wound along the helical grooves of the driving drums located on both sides of the deck, and the ends of which are fixed to the respective drums, mounted x with the possibility of synchronous reverse rotation in the supports of the carriage, which, in turn, is mounted to move across the deck along the guides of the carriage mounted to move along the deck.  2. The device according to claim 1, characterized in that the cutting knife is made with a cutting coating with particles of carbide-abrasive material, which are cutting elements.

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