SU738958A1 - Apparatus for packing granular materials into film - Google Patents

Description

(54) DEVICE FOR PACKAGING SB1PRODUCT PRODUCTS

FILM

The invention relates to a packaging technique, namely, devices for packaging bulk products in a film, and is intended for use mainly in the food, milk, grain processing and other industries that produce bulk or granular products which are packaged in Kraft. -bags with polymer liners.

The main requirement for the equipment providing such packing of granular and granular products is to ensure its moisture impermeability, which is impossible in the case of contamination of the surfaces being welded by dust products during the thermal and HF welding methods, as well as ensuring the welding of polyethylene liners through Kraft bag. Taking into account these peculiarities, installations equipped with a mechanism for ultrasonic bag welding are used for packing bulk products into such containers.

A device is known comprising a metering unit, a conveyor for moving the honeycomb bags filled with the product, a vibrator for compacting the product in the bag, and a mechanism for ultrasonic welding of bags having a head mounted on the hanger with a core tool, and an anvil with a curvilinear working surface.

 ultrasonic generator and bag sewing mechanism 1.

The disadvantage of such an installation is the lack of control over the welding of the package, for example, a bag with an insert, before

10 on sewing. As a result, when the liner is not penetrated, arising from the accidental breakdown of ultrasonic vibrations or a sharp decrease in the oscillation amplitude of the welding tool

15 cracks in an instrument or transducer, etc.) deteriorates the quality of the package and the reliability of the installation.

The aim of the invention is to improve 2Q packaging quality and reliability of the installation.

Claims (2)

To achieve this goal, an installation consisting of a dispenser, a conveyor for moving filled vesicles, vib3 :; . A rator for sealing products in the bag, an ultrasonic welding mechanism, having a head with a welding tool and an anvil, a mechanism for gripping and moving the neck of the bag, a protective mechanism with a device for cutting the thread and an ultrasonic generator, is equipped with bearing supports with safety devices for the anvil and the head , the working surface of the welding tool has a curvilinear shape, and the suspension is sms mounted on a vertical and horizontal axis. In this case, it is advisable to carry out each safety device of the device in the form of at least one clamp with a spring and an adjustment head. FIG. 1 schematically shows the proposed device, front view; in fig. 2 mechanism for ultrasonic welding; in fig. 3 - working sections of the head and the anvil. A device for packing loose products into a film consists of dispenser 2 installed on frame 1, conveyor 3 for moving filled bags, vibrator 4 for compacting the product in the bed, ultrasonic welding mechanism 5, ultrasonic generator 6, sewing membrane 7 for fixing cutting threads. The ultrasonic welding mechanism consists of a head 9, an anvil 10, a mechanism 11 for gripping and moving the neck with a drive 12 mounted on a plate 13, which is supported on columns 14. Installed in head G head 9 contains a converter 15, a welding tool 16 and the first stage of the concentrator 17. The converter 15 and the first stage of the concentrator 17 are enclosed in the housing 18. The head 9 is mounted on the suspension 19 having for this purpose a horizontal axis 20. The suspension 19 has a flange 21, a cam mechanism 22 and a microswitch 23. The suspension The can 19 can rotate around a vertical axis 24 mounted on bearing supports 25. Suspension flange 21 has a safety device 26 made of two or more ball clips. Each retainer consists of a housing 27, a spring 28, a ball 29, a slider 30 and a adjusting nut 31. Suspension 19 is attached by means of a vertical axis 24 to flange 32-11 13. Springs 33 are mounted between suspension 19 and head 9. Anvil 10 is attached to plate 34 pushed It is equipped with a safety device 36. The anvil 10 is a rectangular plate 37 whose length is equal to 3/4 the length of the sound wave in the material. “F;;:; y: hp ...--. . . 58.-. 4 This plate passes from the non-working side into a parallelepiped of large mass. The working side of the plate has edges rounded along the radius g, and this radius is three to four times the thickness of the neck of the bag, and the central part is made along the radius R equal to the distance from the axis of rotation to the working end of the anvil 10 and the tool 16. Adjustment of the gap between the tool 16 and the anvil 10 is carried out by a micrometer screw 38 ... On the plate 3 on the bearing supports 39 a mechanism 11 is gripped and the neck is moved. The latter is in the form of a conveyor consisting of two pairs of wedge-shaped gears 40, the belts of which serve the neck of the mechka during the technological process. Ustansevka works as follows. After the product is automatically dispensed from the dispenser 2, the bag is lowered onto the moving belt 41 of the conveyor 3 and transferred to the ultrasonic welding mechanism 5. The neck of the bag is caught by the belts of the V-belt transmissions 40 and is fed into the gap between the welding tool 16 and the anvil 10. In this case, ultrasonic energy is transmitted to the surfaces of the polyethylene liner being welded inside the kraft bag. Formed welded shch. Then the mesh with the welded liner is fed to the mechanism 7 for sewing bags, and the kraft bag is sutured above the weld. The thread is cut off by the fixture 8. The finished broom is removed from the conveyor 3. The sewing mechanism 7 is turned on and off automatically. The synchronization of the speeds of the mechanism 11, the conveyor 3 and the mechanism 7 is carried out with the help of the variator (not shown in the drawing). When the bag mouth passes between the tool 16 and the anvil 10, friction occurs, which tends to unfold the welding head 9 and the anvil 10, rigidly fixed with the help of safety devices 26 and 36. In the course of movement, the force of the friction (with a constant axial force of pressing the tool 16 to the anvil 10) depends on the oscillation amplitude of the tool 16, and it increases as the oscillation amplitude decreases and reaches a maximum value when the tool oscillates cease. The amplitude of oscillation determines the quality of welding. As a result of adjusting the spring 28 of the safety device 26, it is possible to choose its force such that when the friction force increases between the neck of the bag, on the one hand, and tool 16 and the anvil 10, on the other, for example, 1.5 times (which corresponds to a decrease in the oscillation amplitude below the permissible level of friction torque due to the friction force will allow to overcome the braking force generated by the fixtures 26 and 34. As a result, the head 9 and the anvil 10 are turned to an angle at which the cam mechanism presses the microtransfer yuchatel 23, sends a signal to, stop the machine. This prevents the bag with the non-welded liner from being fed to the sewing mechanism 7. Such a design of the device allows ensuring the safety of the product, saving packaging material, reducing the cost of manual labor. The presence of a mechanism triggered by a sharp decrease in the amplitude of oscillations of the welding tool prevents the formation of low-quality welds and significantly reduces the reject rate during packaging. The economic effect from the introduction of one such installation is about 170 thousand. rubles. Zagruma plow Formula of the invention 1. Device for packing loose products in film, contain its metering device, conveyor for moved and filled meats, vibrator for sealing product P bag, mechat13M For ultrasonic welding of bags, having a head mounted on the hanger with a welding tool and anvil with a curved working surface, an ultrasonic generator and a bag sewing mechanism, characterized in that, in order to improve the quality of the package and the reliability of the device in operation, it is equipped with a bearing and supports with safety devices for the anvil and the head, the working surface of the welding tool has a curvilinear shape, and the suspension is simulated on the vertical and horizontal axes. 2. The device according to claim 1, wherein that each safety device is made in the form of at least one retainer with a spring and a adjusting nut. Sources of information taken into account in the examination 1. US patent No. 32944616, cl. 156-580 ,. 1966.