RU2186008C1 - Device for binding packages at pressing - Google Patents

Abstract

FIELD: packing equipment. SUBSTANCE: invention can be used for binding packages of solid domestic waste with wire after pressing. Proposed device has wire twisting mechanism made in form of disk head with rotary drive and rocking mechanism to provide rocking relative to horizontal axis. Disk head has through radial slot to grip wire. Surface of slot pointed in direction of rotation has involute profile with cutting edge, and width of blind part of slot does not exceed double diameter of wire. Cutoff device is made in form of rigidly secured knife whose cutting blade is located over generating line of disk head plane rocking surface. Length and twist tightness lock is installed between axis of head rocking and knife. Width of entry slot of lock dies not exceed double diameter of wire. Invention provides combined wire gripping and twisting operations, and cutting off and returning of disk head into initial position which makes working cyclone shorter, simplifies design of devices as a whole and improves reliability of wire twisting. EFFECT: enhanced operation reliability. 2 cl, 6 dwg

Description

 The invention relates to packaging equipment and can be used for tying wire packages obtained, for example, in the processing of municipal solid waste by pressure methods.

A device for twisting a wire is known, comprising a disk head equipped with a rotation drive with a through radial slot for gripping a twisted wire (see A.S. USSR 357120, 65 V 13/18, 1970)
The disadvantages of this device are the presence of a manual operation to install and remove a wire divider, ensuring the twisting of the wire into a loop, and limited technological capabilities that exclude the operations of strapping the bag and trimming the wire.

The closest analogue is a device for tying bales in a press, containing a press chamber, a plunger, upper and lower feed coils with wire, guide rollers, a hook, twisting and trimming mechanisms of the wire (see USSR patent 1246885, 65 V 27/12 1983)
This device is taken as a prototype.

 The disadvantages of the prototype include the duration of the working cycle, which consists of separate operations of gripping, clamping, cutting and twisting the wire, which reduces the performance of the device as a whole. The disadvantage of the prototype is also the low reliability of the twisting of the wire, due to the fact that the operation of trimming the wire is performed before twisting it. The wire clip before twisting with the help of friction is also not reliable enough. In addition, multi-linking and the presence of separate drives for gripping, clamping, twisting and cutting wires significantly complicate the design of the device, reduce its reliability.

 The technical problem that the invention solves is to eliminate the above disadvantages of the prototype.

 The essence of the invention lies in the fact that in the device for strapping packages during pressing, containing a press chamber, a plunger, upper and lower feed coils with wire, guide rollers, a hook, a wire twisting mechanism made in the form of a disk head equipped with a rotation drive and a through radial slot for gripping the twisted wire, and a cutting device, a disk head is installed with the possibility of swinging relative to the horizontal axis, the surface of the through radial slot, facing in the rotation side, has an involute profile with a cutting edge, the cutting device is made in the form of a rigidly fixed knife, the cutting edge of which is located on the forming surface of the swing of the upper plane of the disk head, and between the axis of swing of the disk head and the knife is installed an adjustable clamp of length and density of twisting, while the width of the dead end of the through radial slot and the lead-in slot of the retainer should not exceed two wire diameters.

 In addition, the cutting edge of the through radial slot is made on a removable insert.

 The proposed set of essential features allows to obtain the following technical result.

 The twisting mechanism of the wire in the form of a disk head equipped with a rotational drive with a through radial slot for gripping the wire, the slot surface located along the rotation has an involute profile, as well as the installation of an adjustable clamp of the length and density of twisting with width between the axis of swing of the disk head and the knife the dead end of the through radial slot and the lead-in slot of the retainer of not more than two wire diameters, allows you to combine the operation of gripping and twisting the wire, which shortens the working cycle and simplifies the design of the device by eliminating the levers and hinges of the gripping and twisting elements. This increases the performance and reliability of the device, as well as the reliability of twisting the wire.

 Installing the disk head with the possibility of swinging relative to the horizontal axis, supplying a through radial slot with a cutting edge and making a cutting device in the form of a rigidly fixed knife, the cutting edge of which is located along the generatrix of the swing surface of the upper plane of the disk head, allows trimming of twisted wire at the time of removal of the disk head in the initial position, which eliminates the need for a separate drive for the trimming operation, shortens the duty cycle, and also simplifies the design uktsiyu device.

 The installation between the swing axis of the disk head and the knife retainer length and density of twisting provides an increase in the quality and reliability of twisting of the wire.

 The implementation of the cutting edge of the through radial slot on the removable insert increases the durability of the structure and ensures manufacturability.

 In Fig.1 shows a device for tying packages during pressing, General view, the initial position; figure 2 is the same in the twist position of the wire; figure 3 is the same in the position of the wire trim; figure 4 is a view a in figure 1; figure 5 is a section bB in figure 4; figure 6 is a view In figure 2.

 The device for strapping packages 1 during pressing contains a press chamber 2 with a plunger 3, upper 4 and lower 5 feed coils with wire, guide rollers 6 and a hook 7. The device is also equipped with a wire twisting mechanism made in the form of a disk head 8 with a rotation drive 9 and a through radial slot 10 for gripping the twisted wire. The surface 11 of the slot 10, facing the direction of rotation, has an involute profile with a cutting edge 12 made on the removable insert 13, while the width of the dead end portion 14 of the slot 10 does not exceed two wire diameters.

 The disk head 8 is installed with the possibility of swinging along the radius R relative to the horizontal axis 15 using the drive 16.

 A cutting device in the form of a knife 17, the cutting edge of which is located along the generatrix of the swing surface of the upper plane 18 of the disk head 8, as well as an adjustable lock 19 of the length and density of twisting located between the swing axis of the disk head 8 and the knife 17, is rigidly mounted on the body of the press chamber 2 The width of the inlet slot 20 of the latch 19 should not exceed two wire diameters.

 The device operates as follows.

 Compressed waste enters the press chamber 2. At this time, the strands of wire coming from the upper 4 and lower 5 feed coils must be interconnected. The plunger 3 forms a package 1 and moves it to the position of the strapping, dragging together with the package related wire strands from both supply coils. A parting hook 7 makes a reciprocating motion and lifts the wire thread from the spool 5 into the zone of operation of the disk head 8.

 The drive 16 moves the disk head 8 to the binding position, while the slot 10 of the head 8 captures both strands of wire coming from the coils 4 and 5. The drive 9 of the head 8 is turned on and the wire is twisted in the gap between the bag 1 and the latch 19. After that, the drive 16 deflects the head 8 to its original position, at this moment the twisted wire is cut using a knife 17 and a cutting edge 12 of the slot 10. The lower part of the twist of the wire remains on the package 1, and the upper part of the twist ensures the completion of the next strapping cycle pa chum. The cycle repeats.

 The advantage of the device is the simplicity of its design, reliable operation and high performance.

Claims (2)

 1. A device for strapping packages during pressing, comprising a press chamber, a plunger, upper and lower feed coils with wire, guide rollers, a hook, a wire twisting mechanism made in the form of a disk head equipped with a rotation drive and a through radial slot for gripping the twisted wire, and a cutting device, characterized in that the disk head is mounted with the possibility of swinging relative to the horizontal axis, the surface of the through radial slot, facing the direction of rotation, and it has an involute profile with a cutting edge, the cutting device is made in the form of a rigidly fixed knife, the cutting edge of which is located on the forming surface of the swing of the upper plane of the disk head, and between the axis of swing of the disk head and the knife an adjustable lock of the length and density of twisting is installed, while the width of the dead end part the through radial slot and the lead-in slot of the retainer should not exceed two wire diameters.  2. The device according to p. 1, characterized in that the cutting edge of the through radial slot is made on a removable insert.

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