RU111107U1 - LINE FOR PACKING PRODUCTS IN HEAT SHRINKING FILM - Google Patents

Abstract

 1. A line for packaging products in shrink film, characterized in that it contains a packaging module, on the frame of which a thermal knife is mounted with the possibility of moving in the frame guides in the vertical direction, the frame of the chain drive conveyor is attached to the frame of the specified module, on which the thermal tunnel is installed, end parts of the specified conveyor are located outside the thermal tunnel, one end of the conveyor is located on one side of the thermal tunnel near the module frame, and on the other end of the conveyor and on the other side of the shrink tunnel, the frame of the take-up conveyor is fixed, a table is fixed on the frame of the packaging module, over which there are stops fixed to the holders to center the product block relative to the axis of symmetry of the packaging module, the stops are located above the part of the table that is located between the shrink tunnel and the thermal knife, the ends of the stops located outside the specified part of the table and above the conveyor tracks, the thermal tunnel is equipped with at least one means of circulation of the heated air in the heat tunnel, and the packaging module is equipped with upper and lower shrink film bays, an internal cavity is made in the conveyor frame, in which there is a board with line controls down from the upper roll, and the lower branch, extending upward from the lower roll, and the module is equipped with a pusher connected to a pneumatic cylinder for moving the pusher mounted on the frame of the module, as well as

Description

This technical solution relates to packaging machines for piece, group or transport packaging of food, souvenir, technical, printing and other products in polyethylene shrink film. The line is designed for packaging products in cans, bottles, PET containers, bags that may contain canned goods, carbonated drinks, milk, flour, juices, as well as for packaging non-food items: printing, furniture, long items, various souvenir products. The line carries out packaging of both piece products and units of production units. A product block is several units of products or products, or a plurality of product units combined by a film into one unit.

The technical solution presented in this description is intended for use in line designs equipped with packaging modules with a manual drive and thermal tunnels. The technical solution is intended for its use in the construction of lines equipped with semi-automatic thermal knives with pneumatic drive of the thermal knife, fixation of the packaging, automatic film winders and pneumatic breakers products.

BACKGROUND OF THE INVENTION Lines are known from the state of the art for packaging into shrink film products in packs, each of which contains a packaging module, inlet and outlet conveyors, a film welding unit, upper and lower film unwinding units, automatic line operation control elements, a heat tunnel, a device for fixing the package and film auto-winders.

From the patent documentation there is known a device for group packaging of piece products in shrink film containing a frame, an unwinding device for shrink film rolls, a packaging table, a transverse window for welding and cutting, welding and cutting units configured to form two parallel welds and cut the film in the interval between these welds, the supply unit of the formed block of products in the packaging zone and the clamp for fixing the packaged products and shrink film according to their ver the henna of the plane, characterized in that it is additionally equipped with a unit for supplying products to the formation zone of the block, contains two gates, one of which is located at the exit from the formation zone of the block of products, and the other at the exit of the packed block from the packaging zone with its offset from the packing table , the welding and cutting units are located separately from each other, respectively, above and below the transverse window and are arranged to move towards one another, and the cutting unit is equipped with a knife configured to ydvizheniya for cutting the film (RU 71630 U1, 20.03.2008).

Also known is a device for packaging products in shrink film, including a mechanism for feeding products containing a fixed frame and a movable horizontal pan, a roll holder, a welding mechanism, a heat chamber and a control panel, characterized in that the shrink chamber is made with a movable front and blank rear walls and the pallet movable in the horizontal plane is mounted with the possibility of reciprocating movement (RU 5171 U1, 10.16.1997). The welding mechanism is made in the form of a spring-loaded thermal knife, pivotally connected to the rear wall of the fixed frame.

A known installation for packaging products in shrink film containing mounted on the base of the roll holder and the housing, inside of which there are heating elements, a fan, a protective partition and a welding device, characterized in that the casing is additionally equipped with a trellis tray, a rotary damper and two reflectors, the first of which is located in a horizontal plane under the trellis tray in the suction area of the fan installed in the lower part of the housing, and the second is located vertically the surface plane, passing under the first reflector between the fan and the protective partition with the possibility of directional blowing of heating elements installed along the housing wall and separated from the working area by a rotary type damper installed in the upper part of the housing, and a protective partition made vertically and reaching the location plane the first reflector, while the housing is additionally equipped with a box-shaped cover, along the perimeter of the lower part of which is at least two adjacent The raion placed linear heaters of the welding device (RU 95118220, 10.10.1997). Linear heaters of the welding device are made of nichrome wire. The cover is made of a transparent structural material.

A device for packaging products in shrink film, for example bottles, cans, metal and wooden products, household chemicals, cosmetic chemicals, cartridges, containing a skeleton, an unwinding device, a packing table, a clamping jaw of a welding device located in the transverse window of the table, is welding-cutting a sponge located on the frame, made with the possibility of rotation in a vertical plane, a loading device containing a pushing bar. The frame is equipped with a U-shaped lever with a swinging clamp pressing the heat-shrink film and the product block at the time of welding, and the transverse window is made with a shutter that closes the lower welding jaw at the moment of moving the product block to the welding position and kinematically connected with the pushing bar (RU 2203841 C1, 05/10/2003). The invention improves the quality of packaging in shrink film, facilitates the work of the operator, increases productivity on packaging machines with manual transmission.

A device for automated packaging in shrink film of a group of products on a substrate or tray, which contains a feed conveyor, a drive, mechanisms for separating and moving the product block and feeding substrates (reamers) to the ejector, a mechanism for wrapping and trimming and welding into the film, heat tunnel wherein the mechanism for separating and moving the product block has a grip with limiters around the perimeter of the block, receiving and transmitting conveyors, a front pusher kinematically connected with the grip, p why the latter is mounted on the carriage with the possibility of vertical and horizontal reciprocating movement, the receiving and transmitting conveyors are synchronized in speed with the movement of the carriage along the course of the products, the pusher of substrates (reamers) has a supporting surface commensurate with the substrate, and is made with the possibility of angular rotation around the horizontal axis, the ejector and the feed mechanism of the substrates (reamers) are connected to the carriage; in another embodiment of the device, the receiving conveyor is a roller table, under which a tray shaper is installed with the possibility of vertical reciprocating movement in the form of a set of rods of different lengths, and above the roller table there is a device for applying glue to the reamer of the tray with side clamps (RU 2170693 C, 07.20.2001 )

A device for packaging products and their kits in shrink film containing a shrink film supply unit, a spring-loaded heat cutter, a heat chamber, fans, a product supply unit in a heat chamber in the form of a table with a tabletop having a T-shaped cross-section in a horizontal plane, moreover, the device, the bottom of the heat chamber is made with a through slot having an arc path coinciding with the path of movement of the lower part of the tabletop section, the fans are installed near the tabletop, two seconds on each side of it, with the possibility of blowing from above and below the product located on it, the countertop is made in the form of three circumferentially located planes formed by a lattice surface, and the thermal knife and the fan unit are located around the circumference of the table near the countertop (RU 2148542 C1, 05.10.2000). A device for packaging products in a thermoplastic polymer film, mainly heat-shrinkable, comprising a roll unwinding unit with a support roller mounted in the housing, a welding unit and a heating table. The welding unit includes a clamping beam installed above the elastic support carrying a profile resistive electric heater. A heating table is installed behind the welding unit. On the supporting roller of the unwinding unit, the perforator spikes are radially fixed. A horizontal mounting frame is additionally docked on the housing (RU 2132775 C1, 07/10/1999). The invention provides a snug fit of the film to the surface of the product, increasing the quality of the package, and also produces packaging in different starting materials with a different sequence of operations.

A known machine for packaging in shrink film containing a desktop located between opposite surfaces of the film, the machine includes a device for automatically opening the film for insertion between its surfaces of the product (RU 2074102 C1, 02.27.1997).

Known manual installation for packing piece or a group of products in a shrink film containing a frame with a working table and a transitional table, between which there is a thermal knife, a lever through a rod connected to the foot pedal of the thermal knife drive, while a heat-shrink chamber with a conveyor is located behind the thermal knife, and a roll the film is located under the desktop (RU 2170195 C2, 07/10/2001).

A device is known for packaging roll material into a shrink film containing a film feeding mechanism, a thermal knife for cutting a film, a feeding and output conveyor, a heat chamber and means for forming the ends of the package, while the thermal knife is mounted on a swing arm (RU 2086482 C1, 08/10/1997).

Devices for packaging products into a film are known from foreign patent documentation, each of which contains a roll unwinding unit with a support roller, a film packaging unit, a welding unit, a table and device control elements (WO 20060771103 A1, 07.27.2006; WO 2007080451 A2, 07/19/2007; GB 1 421 977 A, 01/21/1976; US 3587839 A, 06/28/1971; US 4104848 A, 08/08/1978; US 4945707 A, 08/07/1990; US 4945707 A, 08/07/1990; FR 2062674 A5, 25.06. 1971; FR 2617121 A1, 12/30/1988). There is also a method of packaging an article by wrapping it with an anticorrosive film or paper using film heating and heat reduction, as well as a device for implementing the method comprising a metal table with a continuation in the form of a conveyor, film rolls with the possibility of unwinding it on a table, a packaging device and an oven ( JP 3846999 B2, 11/15/2006).

Well-known lines do not meet the ever-increasing demands of packaging quality and productivity, as well as the requirements for compact lines.

The technical result of the invention is to improve the quality of packaging and line performance, as well as increasing the compactness of the line.

The technical result was obtained by a line for packaging products in shrink film, characterized in that it contains a packaging module, on the frame of which a thermal knife is installed with the possibility of moving in the frame guides in the vertical direction, the frame of the chain drive conveyor is attached to the frame of the specified module, on which the thermal tunnel is installed, the end parts of the conveyor are located outside the thermal tunnel, one end of the conveyor is located on one side of the thermal tunnel near the module frame, on the other ends on the other side of the conveyor, on the other side of the thermal tunnel, the frame of the take-up conveyor is fixed, a table is fixed on the frame of the packaging module, over which are fixed the holders on the holders to center the product block relative to the axis of symmetry of the packaging module, the limiters are located above the part of the table that is located between the thermal tunnel and the thermal moreover, the ends of the limiters are located outside the specified part of the table and above the conveyor tracks, the thermal tunnel is equipped with at least one circulating means and heated air in the heat tunnel, and the packaging module is equipped with upper and lower shrink film bays, an internal cavity is made in the conveyor frame, in which there is a board with line controls, run-off shrink film sheets from these bays are welded together into one fabric with an upper branch extending down from the upper roll and lower branch extending up from the lower roll, the module is equipped with a pusher connected to the pneumatic cylinder of movement of sense atelier, as well as a clamp connected to the pneumatic cylinder for moving the pusher fixed on the module frame.

The roller table contains a frame with upper rails in which nests are made along the length with the ends of the removable rollers located therein.

The conveyor contains a pair of closed flexible branches connected to each other by tracks, forming a moving track for moving products along the line, with the ends of the conveyor located behind the thermal tunnel, and a fan mounted over the receiving roller table and the conveyor along the direction of the production unit to cool the packaging film heated in the thermal tunnel.

The module has rollers mounted on the upper and lower parts of its frame, on which the upper and lower shrink film coils are located, respectively, with the possibility of their rotation on the rollers, which are connected to their rotation motors.

Figure 1 shows a line for packaging products in shrink film in front view with respect to the longitudinal axis of the line; figure 2 is a view of the line from above; figure 3 - packaging module line, side view with respect to the longitudinal axis of the line; figure 4 - packaging module, top view; figure 5 - packaging module, front view; Fig.6 is a diagram of the packaging of products by the packaging module in shrink film; Fig.7 - node unwinding the upper roll of shrink film; on Fig - node unwinding the lower roll of shrink film.

The line contains a packaging module 1 (Fig. 1), on the frame 2 of which a thermal knife 3 is mounted with the possibility of moving in the vertical direction, for which the thermal knife is mounted on a frame 4 installed in the guides 5 of the frame 2 (Fig. 5).

Frame 6 is docked with frame 6 (Fig. 1), on which a chain conveyor 7 is mounted, having a pair of closed flexible branches connected to each other by tracks 8, forming a moving product movement path along the line. The conveyor design regarding the connection of each track with the flexible branches of the conveyor has an original design and in this regard, it is not disclosed in this description.

The conveyor 7 has an electric drive 9 (figure 2) moving its flexible closed branches, which is fixed to the end of the frame 6, the most remote from the frame 2 of the packaging module. The conveyor 7 has an end portion 10 (FIG. 1) extending beyond the thermal tunnel and located near the frame 2 of the packaging module 1.

A receiving roller 11 is fixed on the frame 6, comprising a frame 12 with upper guides 13, in which there are nests along the lengths of the ends of the plurality of removable rollers 14. The design of the roller, in terms of its connection with the guides 13 of the conveyor, also has an original design and in this regard it is not disclosed in this description.

On top, approximately in the middle part of the frame 6, a heat tunnel 15 is fixed, in the casing of which a thermal working cavity is made for heating the shrink film. A conveyor 7 is located at the bottom of the heat tunnel along its entire length. The bottom of the thermal tunnel has an open opening closed by the upper branch of the conveyor 7. Each rack of frames 2 and 6 has a height-adjustable support 16 in the lower part.

A table 17 is fixed on the frame 2 of the packaging module (FIG. 2), above the table there are stops 19 fixed to the holders 18 for centering the product block relative to the axis of symmetry of the packaging module before feeding the product block to the package and under the thermal knife. The limiters 19 are located above the table part 20 (FIG. 2), which is located between the thermal tunnel 15 and the thermal knife 3. The ends of the limiters 19 extend beyond the part 20 of the table 17 and are located above the tracks 8 of the conveyor 7. Behind the thermal tunnel 15 (FIG. 1), above a receiving roller 11 and a conveyor 7, in the direction of the production unit, a fan 21 is located for cooling the packaging film heated in the heat tunnel.

The line is equipped with at least one means 22 of air circulation in the cavity of the heat tunnel, providing high-quality uniform heating of the shrink film in the heat tunnel. The circulation of heated air was carried out in the cavity of the thermal tunnel in order to exclude the concentration of heat in the heating zones by the heating elements of the thermal tunnel.

The packaging module 1 (FIG. 1) has an upper bay 23 of a polyethylene heat-shrink film fixed on the upper part of the frame 2. On the lower part of the frame 2, the lower bay 24 of the polyethylene shrink film is installed. Each bay is mounted on rollers 25 (Fig.7, 8) with the possibility of its rotation around its own axis of symmetry.

The frame 6 has an internal cavity 26 in which there is a board 27 with electric controls for heating elements of the heat tunnel 15 mounted thereon, an electric motor for driving the air circulation means 22 in the cavity of the heat tunnel, and a fan 21. The board 27 provides power to the packaging module containing the thermal knife 3 and drive rollers 25 film unwinding nodes, which are connected by electrical wires to the power supply network through the elements of the board 27. Shrink-wrap films that run from these bays 23 and 24 (Fig. 6) Varena together in one web, having an upper arm 28 extending downwardly from the roll 23 and the lower branch 29 extending upwardly from a roll 24. The packaging unit 30 during production in a film unit 30 is in contact with both these film branches.

The packaging module 1 is equipped with a pusher 32 fixed to the bracket 31 (FIG. 2), which is connected by a lever 33 to the pneumatic cylinder 34 for moving the pusher fixed on the frame 2. The packaging module 1 is equipped with a clamp 35 (Fig. 5), which is connected to a pneumatic cylinder 36 for moving the clamp mounted on the frame 2. The clamp 35 is located above the table with part 20 of the table 17. Also, the packaging module 1 is equipped with electric motors 37 (Fig. 1), connected, respectively, to the upper and lower rollers 23 and 25, which provide rotation of the upper film roll 23 and the lower film roll 24.

The design of the thermal tunnel 15 (Fig. 1), its mechanical part, has an original design and, therefore, it is not disclosed in this description. It is significant that the heat tunnel contains at least one of the mentioned means 22 for circulating hot air in the heat tunnel installed in its working cavity 38, which is connected to the drive motor 39 of the means 22, as well as electric heaters 40 located in the working cavity of the heat tunnel, connected to the power supply .

The air circulation means is an original impeller. The impeller design is not disclosed in this description, since it is an independent and independent solution. The functions of the specified means for circulating air in the cavity of the tunnel can be performed by any other known means, for example, a fan driving air in the cavity of the tunnel in a given direction.

The working cavity 38 of the thermal tunnel contains a duct system. The electric motor 39 of the drive of the air circulation means 22 is mounted on the body of the thermal tunnel, and the circulation means 22 is located under the electric motor 39. Since the structures of the circulation means and the thermal tunnel, in their entirety, have an original design and are not disclosed in this description, in the example of the invention As a means for circulating air in the cavity of the thermal tunnel, one can use an impeller with working elements oriented in any known manner with respect to its axis.

The unwinding site of the upper roll of heat-shrinkable film (Fig. 7) and the unwinding site of the lower roll of heat-shrinkable film (Fig. 8) are made according to one scheme and contain the mentioned rollers 25, rotationally mounted in pairs 41, one roller 25 of a pair of rollers of the upper and lower nodes of the unwinding is made driven and connected, respectively, with the motor 37 of its rotation.

On each frame 41, a pair of racks 42 is rigidly fixed, in which vertical guides 43 are made and the ends of the roll holders 44 are freely mounted on them, on which the rolls are fixed against the possibility of falling (rolls not shown in Figs. 7 and 8).

Reference numeral 45 in FIG. 6 shows a stop fixed to the module frame 2. The emphasis is located under the thermal knife 3 with the possibility of their interaction at the time of welding of the film. The upper unwinding unit contains a film tensioner (Fig. 7) containing a U-shaped frame 46, which is essentially a two-arm lever, pivotally connected to the uprights 42. At the ends of the frame, counterweights 47 are mounted that can be moved to move the frame around the hinges of its fastening to the racks.

A block 48 for controlling the thermal knife 3, rollers 25 and pneumatic cylinders for moving the pusher 32, clamp 35 and thermal knife 3 is fixed on the frame 2 of the packaging module 1 (FIG. 5). On the roll holders 44 there are latches 49 that fix the film rolls 23 and 24 in the working position. Frame 4 is connected with the pneumocylinder 50 of its movement in the guides 5 of the frame 2.

The packaging line operates as follows. The product units are fed manually to the table 17 of the packaging module and on the table from the product units manually form the product block 30 (Fig.6), which is located in the working area of the pusher 32. In the module 1, the product block is wrapped in shrink film by moving the pusher 32 of the product block 30 in the direction of the arrow as shown in Fig.6. After passing through the production unit 30 of the line of action of the thermal knife 3, the pusher 32 from the action of the pneumatic cylinder 34 returns to its original position, the clamp 35 from the action of the pneumatic cylinder 36 fixes the block on the table 20, after which the thermal knife 3 from the action of the pneumatic cylinder 50 is lowered and thermally welds the upper and lower branches 28 and 29 to form a film seam. Simultaneously with the film welding process, the film is cut off, wrapping the block 30. The film is cut from the upper and lower branches 28 and 29 of the film, which run from rolls 23 and 24.

After welding, the film segments of the thermal knife 3 and clamp 35 are returned to their original position.

After the formation of the next block of products on the table 17, the described packaging cycle is repeated. The next production unit is pushed by the pusher 32 from the action of the pneumatic cylinder 34 to the table part 20, and the previous production unit is pushed by the next unit onto the tracks 8 of the conveyor 7, which automatically feed the production unit to the thermal tunnel 15. In the thermal tunnel, the film is heated to a predetermined temperature for a predetermined period of time. In this case, the production unit is moved by the conveyor 7 in the thermal tunnel away from the packaging module 1. While the product block is in the thermal tunnel, due to the original design of the latter, the circulation means 22 provides air circulation in the cavity of the thermal tunnel and its ducts.

After the output of the product block from the heat tunnel, the film of the product block cools and due to its properties, the process of heat shrinkage occurs. Due to heat shrinkage, the surface of the production unit 30 is compressed by a film. From the heat tunnel, the packaged product unit is pushed by the tracks 8 of the conveyor 7 onto the rollers 14 of the take-up conveyor 11 (FIG. 2), where the hot film is cooled by the fan 21. In the process of cooling the film, it shrinks and compresses the product unit from all sides and cures. Then the product block from the receiving roller 11 is transported to the storage location.

In the process of packaging the product blocks with a film, the branches 28 and 29 of the film (6) from the action of automatically switched on electric motors 37 are unwound due to the rotation of the rollers 25 and due to the rotation of the rolls 23 and 24 mounted on the rollers 25. The unwinding of the film is carried out in predetermined directions. In this line, the product and the film-packed product block move in the same direction, in the same plane in a straight line, which makes it possible to easily push the first product block in subsequent blocks. Due to the use of electric motors that automatically unwind the film, and pneumatic cylinders that push the product blocks, clamp the product blocks, pack them into the film, and weld the film and its length, they are performed automatically, except for the formation of the product block on table 17, which is carried out manually.

Since the shrink tunnel is equipped with air circulation means 22 in the shrink tunnel cavities, the temperature in the shrink tunnel is substantially equalized and, as a result, the shrink film in the shrink tunnel heats more evenly, which significantly improves the quality of the shrink film.

The layout of the line has a simple design, which made it possible to significantly reduce its weight, dimensions, energy consumption and use the line in conditions that correspond to the packing mode in terms of its intensity, when high line productivity is not required, however, this requires one part of the operations to be performed manually when performing all other operations in automatic mode.

During the operation of the line, the performance of which depends on the capacity of the thermal tunnel 15, the air circulation means 22 constantly circulates hot air in the thermal tunnel ducts, mixes it with a less heated air mass, improves heat transfer between the hot air and the thermal tunnel walls, increases the hot air pressure in the thermal tunnel, provides intensive heat transfer to the film in the working cavity of the thermal tunnel and creates a constant set temperature in each of its zones. As a result, the heat-shrink film wrapped in the product block is uniformly heated over the entire surface of the product block in contact with heated air, which eliminates the uneven heating of the film, the unevenness of heat shrinkage, tension and thermal stresses, leading to local breaks and microscopic negative changes in the structure of the film.

When using the hot air circulation means installed in the heat tunnel in the line, the quality of the package leaving the heat tunnel is significantly improved, which allows to increase the throughput of the heat tunnel and, accordingly, the line productivity. It should be noted that during the operation of the air circulation means in the cavity of the thermal tunnel, a small pressure of hot air is created, which, however, reduces the heating time of the film and the residence time of the product in the thermal tunnel. This positive effect also reduces the dimensions of the thermal tunnel, which significantly increases the compactness of the line. The technical solution was used in the design of the packaging line UM-1 "Profi".

Claims (3)

1. A line for packaging products in shrink film, characterized in that it contains a packaging module, on the frame of which a thermal knife is mounted with the possibility of moving in the frame guides in the vertical direction, the frame of the chain drive conveyor is attached to the frame of the specified module, on which the thermal tunnel is installed, end parts of the specified conveyor are located outside the thermal tunnel, one end of the conveyor is located on one side of the thermal tunnel near the module frame, and on the other end of the conveyor and on the other side of the shrink tunnel, the frame of the take-up conveyor is fixed, a table is fixed on the frame of the packaging module, over which there are stops fixed to the holders to center the product block relative to the axis of symmetry of the packaging module, the stops are located above the part of the table that is located between the shrink tunnel and the thermal knife, the ends of the stops located outside the specified part of the table and above the conveyor tracks, the thermal tunnel is equipped with at least one means of circulation of the heated air in the heat tunnel, and the packaging module is equipped with upper and lower shrink film bays, an internal cavity is made in the conveyor frame, in which there is a board with line controls, run-off shrink film blades running from these bays are welded together into one sheet with an upper branch extending downward from the upper roll, and a lower branch extending upward from the lower roll, and the module is equipped with a pusher connected to a pneumatic cylinder for moving the pusher fixed to the frame of the module, as well as zhimom connected to a frame attached to a pneumatic cylinder unit movement of the pusher. 2. The line according to claim 1, characterized in that the conveyor contains a pair of closed flexible branches connected to each other by tracks, forming a moving track for moving products along the line, with the ends of the conveyor located behind the heat tunnel, and above the receiving roller table and conveyor in the direction of travel unit of production, a fan is fixed for cooling the packaging film heated in the heat tunnel. 3. The line according to claim 1, characterized in that the module has rollers mounted on the upper and lower parts of its frame, on which the upper and lower shrink film coils are located, respectively, with the possibility of their rotation on the rollers, which are connected to electric motors for their rotation.