RU111109U1 - LINE FOR PACKING PRODUCTS IN HEAT SHRINKING FILM - Google Patents

Abstract

 A line for packaging products in shrink film, characterized in that it contains a frame on rollers with a receiving roller table and a heat tunnel installed on it, inside which a chain conveyor is located, while a preparation table, a work table, a heat tunnel and a roller table are fixed on the bed , above the preparatory table is a separator made of a curved zigzag bar, having an upper portion curved upwards relative to the lower part of the separator, between which a gap is formed on the preparatory table, a bypass roller is fixed on the preparatory table, interacting with the film which is removed from the roll, a L-shaped thermal knife is fixed on the bed in front of the working table, under which there is a fixed L-shaped stop fixed to the bed, the line has a frame of the unwinding unit, which mounted on the end face of the bed, opposite the other end of the bed, on which the roller table is fixed, on the frame of the unwinding unit, a single-arm lever with a brake pad interacting with the film roll is pivotally mounted on the frame a counterweight is movably fixed with the possibility of fixation, a roll holder is installed in the cheeks of the frame of the unwinding unit with a roll of film folded in two layers attached to it, the roll is mounted on the roll holder with the possibility of rotation together with the roll holder, the ends of which are installed in the nests of the frame cheeks, while between the cheeks with the possibility of rotation and interaction with the film, a perforator is located, the thermal knife has a magnet cup interacting with an electromagnet mounted on the thermal knife stop, the thermal knife is installed with the possibility of

Description

This technical solution relates to packaging machines for automatic packaging in thermoshrinkable polyolefin or polyvinyl chloride film of food and non-food products: meat, fish, vegetables, fruits, bread, confectionery in boxes, printing products, souvenirs, other products in boxes, banks and on substrates . The technical solution is intended for use in line designs having a single frame on wheels with brakes for ease of movement of the line, a thermal tunnel and a conveyor belt.

The prior art lines for packaging in shrink film, each of which contains a shrink module, a packaging module, inlet and outlet conveyors, a film welding unit, at least one film unwinding unit, a shaper, a thermal knife and a thermal knife stop.

From the patent documentation, there is known a method and device for packing items arranged in one or more rows in a shrink film, in which items are wrapped with two film tapes, welded using a welding clamp, then the items are moved to two film tapes with a pusher, which at the end of the feed movement stretches these film tapes, while each of the film tapes is immovably held by a hose brake, and when the welding clamp moves down to complete the wrapping of the tape a wreath around objects, the welding clamp finally pulls the top film. Parts of the film protruding beyond the objects are heat-shrink using nozzles directing hot air to the objects (RU 2118276 C1, 08.27.1998).

Also known is a device for group packaging of piece products in a shrink film containing a frame, an unwinding device for rolls of heat shrink film, a packing table, a transverse window for welding and cutting, welding and cutting units made with the possibility of forming two parallel welds and cutting the film in the gap between these welds, the feeding unit of the formed block of products into the packaging zone and the clamp for fixing the packed products and shrink film along their upper plane, cast the fact 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, welding units and cutting are located separately from each other, respectively, above and below the transverse window and are arranged to move towards each other, and the cutting unit is equipped with a knife made with the possibility of its extension for IMPLEMENT 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 (RU5171 U1, 16.10.1997). 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 On the sides, linear heaters of the welding device are placed (RU 95118220 A, 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, the heating table is installed behind the welding unit, on the supporting roller of the unwinding unit, the perforator spikes are radially fixed, on the case an additional horizontal mounting is docked I frame (RU 2132775 C1, 10.07.1999). 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 table 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 feed 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 frame, assemblies for unwinding a roll and packaging products into a film, means for welding film and a product former in packages (WO 20060771103 A1, 07.27.2006; WO 2007080451 A2 , 19.07.2007; GB 1421977 A, 01/21/1976; US 3583888 A, 06/08/1971; US 3587839 A, 06/28/1971; US 4104848 A, 08/08/1978; US 4945707 A, 08/07/1990; US 4945707 A, 07.08.08 .1990; FR 2062674 A5, 06/25/1971; FR 2617121 A1, 12/30/1988; DE 2822674 A1, 11/29/1979).

A known method of packaging an article by wrapping it with an anticorrosive film or paper using heating the film and reducing heat, 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 the table, a packaging device and an oven (JP 3846999 B2, 11/15/2006).

Known technical solutions solve the problems corresponding to them, while they do not meet the increasing demands of productivity and quality of packaging, as well as the requirements of compactness.

The technical result of the invention is to improve the quality of packaging, line performance and reduce its size.

The technical result was obtained by a line for packaging products in shrink film, characterized in that it contains a frame on rollers with a receiving roller table and a heat tunnel installed on it, inside which there is a chain conveyor, while on the bed along the course of production the preparatory table, working table, thermal tunnel and roller conveyor, over the preparation table there is a separator made of a curved zigzag bar having an upper part curved upwards relative to the lower part p a separator between which and the preparatory table a gap is formed, a bypass roller is fixed on the preparatory table, interacting with the film that escapes from the roll, a L-shaped thermal knife is fixed on the bed in front of the work table, under which there is a fixed L-shaped stop fixed to the bed, the line has the frame of the unwinding unit, which is fixed on the end of the bed opposite to the other end of the bed, on which the roller table is fixed, on the frame of the unwinding unit, a one-arm lever with a brake shoe is pivotally fixed which is attached to the roll of film, a counterweight is movably fixed on the lever with the possibility of fixation, a roll holder is installed in the cheeks of the frame of the unwinding unit with a roll folded in two layers of film fixed to it, the roll is mounted on the roll holder with the possibility of rotation together with the roll holder, the ends of which are installed in the nests of the cheeks frames, while between the cheeks with the possibility of rotation and interaction with the film, a perforator is located, the thermal knife has a magnet cup interacting with an electromagnet mounted on the thermal knife stop, The thermal knife is mounted with the possibility of adjusting its position in the vertical plane and is mounted on the bed, the thermal knife is rotationally mounted on the axis of the thermal knife fastening, fixed on the thermal knife stop and has a mechanism for returning to the initial position, an electric motor is installed on the thermal tunnel connected to the air circulation means located in the cavity of the thermal tunnel cavity of the thermal tunnel in which electric heaters are installed.

Figure 1 shows the line for packaging products in front view with respect to the longitudinal axis of the line; figure 2 is a line in a top view; figure 3 - packaging line in a spatial image; figure 4 is a diagram of the storage (refueling) of the film between the elements of the unwinding unit of the roll (the horizontal arrow shows the direction of movement of the product and the film; figure 5 - thermal knife and film separator in a spatial image (fragment).

The line contains a frame 1 (Fig. 1), on one end of which a receiving roller table 2 is installed, a thermal tunnel 3 is installed on the frame 1, inside of which there is a chain conveyor 4, the closed branches of the chains of which are connected by tracks. A work table 5 is fixed on the bed 1, above which there is a thermo-knife pivotally connected to the stop by an L-shaped thermo-knife 6.

The bed is mounted on rollers 7 with the possibility of rolling over a supporting surface. The line has a frame 8 of the unwinding unit, which is fixed on the other opposite end of the bed 1. In the cheeks of the frame 8 there is a roll holder 9 on which a film roll 10 is fixed. The film in the form of a web has a longitudinal inflection line and is folded in a bay in two layers. The roll is mounted on the roll holder with the possibility of rotation together with the roll holder, the ends of which are freely mounted in the sockets of the cheeks of the frame 8 with the possibility of rotation.

On the bed 1 is fixed preparatory table 11 (figure 2), which is located above the frame 8 (figure 1) of the unwinding unit. Over the preparatory table 11 is located made of a curved zigzag rod film separator 12. The separator 12 is mounted on the table 11 in such a way that a gap is formed between the plane of this table and the separator, while the upper part 13 of the separator is curved upward relative to the lower part 14 of the separator (Figs. 3, 5), between which the said gap is formed.

On the preparatory table 11 (figure 4) is a bypass roller 15, interacting with the film, escaping from the roll. A single-arm lever 16 with a brake shoe 17 interacting with the roll 10 through its roll holder 9 when the line is operating is pivotally mounted on the frame 8 of the unwinding unit. For this, the brake shoe is mounted on the roll holder roller. A counterweight 18 is movably mounted on the lever 16 with a possibility of fixation, which ensures the pressing of the block 17 against the roll of the roll holder 9.

An electric motor 19 is installed on the thermal tunnel 3 (Fig. 1), which is connected to the hot air circulation means 20 in the cavity of the thermal tunnel 21. Heaters 22 are installed in the cavity 21. A line control unit 23 is located on the side of the bed.

The conveyor chains 4 are connected to the electric motor 24 of the conveyor drive. Under the L-shaped thermal knife 6 of the line there is a reciprocal L-shaped stop 25 rigidly fixed on the bed 1 with the possibility of its vertical movement. The thermal knife 6 (Fig. 5) is pivotally connected to one end of the gas stop 26, the other end of which is connected by a hinge to the bracket 27 of the bed 1. The gas stop is used to facilitate manual operation of the thermal knife to automatically raise the thermal knife to its original position.

The canvas 28 of the film, escaping from the roll (figure 4) interacts with the separator 12 during its movement along the arrows of the film. The line contains a rotary hammer 29 mounted rotatably in the cheeks of the frame 8, which bends around the bottom of the film web to form holes from the action of the hammer. Holes in the film are necessary for air to escape from the product unit packaged in the film. The film unwinding unit also contains bypass rollers 30 (FIG. 4), with which the film interacts, forming together with the rollers 30 a bypass loop in which the punch 29 is located.

The branches of the conveyor 4 are connected by tracks 31 (figure 2). The thermal knife 6 on its upper bar 32 (Fig. 5) has a magnet cup 33 that interacts with an electromagnet 34 fixed to the thermal knife stop 25. The thermal knife has a handle 35 to move it. On the roll holder 9 are latches 36 (figure 2), fixing the roll 10 of the film (figure 1) in the working position.

Thus, the line contains its main components - a bed with a receiving roller table 2 and a thermal tunnel 3 installed on it, inside which a chain conveyor 4 is located, on the bed along the course of the production, a preparation table 5 and a work table 11 are fixed, above the preparation table is made of curved zigzag rod film separator 12. The frame 8 of the unwinding unit is located under the preparatory table, at which the desktop is located along the direction of production.

The line works as follows. The diluted upper and lower layers of the film 28 (FIG. 4) are seasoned on the top and bottom of the divider 12. When the film is folded in two layers from the bay 10, it falls onto a perforator 29, which punches holes in the film. Pull the film onto the desktop 5 (figure 2) and tuck the end of the film folded in half for the area of its segments with that part of the thermal knife that is located across the line. Refueling is carried out in such a way that the required film length remains on the desktop 5 behind the thermal knife. The transverse part of the thermal knife 6 welds two layers of the film and cut them from the canvas of the film located behind the thermal knife. In this case, a welded transverse seam is formed on the film and two layers of the film are welded on one transverse side. Located at right angles, the second side of the obtained film packaging is formed by a double-folded film. Stack the products between the lower and upper layers of the film and, thus, form a block of production.

The product block is placed on the working table 5, the thermal knife 6 is lowered to the stop, while the magnet 34 magnetizes the magnet cup 33, the transverse and longitudinal seams of the film are welded for the time specified for the operation of the electromagnet. After welding is completed, the thermal knife returns to its original position under the action of the gas stop 26. In this case, the film is cut and a transverse weld is formed for the next package. As a result, the product is closed in the package with three welds and one kink of the film.

After the operations, the product block is conveyed by 4 to the thermal tunnel 3, the film is heated in it, which shrinks and compresses the products in packaging from all sides. Conveyor 4 displays the product block from the thermal tunnel on the roller table 2 and moves the product block into the storage area. When the line is operating, the reel 10 is unwound and the brake shoe 17 is automatically pressed against the surface of the roll holder 9 by the action of the counterweight 18 and slows down its rotation together with the film roll placed on it, which eliminates the spontaneous unwinding of the film from the roll.

During the operation of the line, the performance of which depends on the throughput of the thermal tunnel, the circulation means 20 constantly circulates hot air in the thermal tunnel ducts and in its cavity 21, mixes it with a less heated air mass, provides intensive heat exchange in the working cavity and creates a constant predetermined temperature in each of its zones temperature. 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 unevenness of heating of the film, the unevenness of its heat shrinkage and tension, and thermal stresses in it, leading to local breaks and microscopic negative structural changes films. When the thermotunnel is operating in its cavity, the hot air pressure increases from the rotation of the circulation means, which increases the heating rate of the film in the thermotunnel and additionally ensures its compression to the surface of the product. All this leads to uniform heating and tension of the packaging film in the heat tunnel; uniform heating of the film reduces the concentration of stresses in it during heat shrinkage.

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, while the quick heating of the film in the heat tunnel allows you to increase the throughput of the heat tunnel, respectively, the productivity of the line and provides the opportunity to reduce the dimensions of the heat tunnel and the line as a whole. Reducing the dimensions of the line and increasing its compactness is also achieved due to the described layout of the line nodes. The technical solution was used in the design of the packaging line UM-2 "Universal Plus".

Claims (1)

A line for packaging products in shrink film, characterized in that it contains a frame on rollers with a receiving roller table and a heat tunnel installed on it, inside which a chain conveyor is located, while a preparation table, a work table, a heat tunnel and a roller table are fixed on the bed , above the preparatory table is a separator made of a curved zigzag bar, having an upper portion curved upwards relative to the lower part of the separator, between which a clearance is formed on the preparatory table, a bypass roller is fixed on the preparatory table, interacting with the film that escapes from the roll, an L-shaped thermal knife is fixed on the bed in front of the working table, under which there is a fixed L-shaped stop fixed to the bed, the line has a frame of the unwinding unit, which mounted on the end face of the bed, opposite the other end of the bed, on which the roller table is fixed, on the frame of the unwinding unit, a single-arm lever with a brake pad interacting with the film roll is pivotally mounted on the frame a counterweight is movably fixed with the possibility of fixation, a roll holder is installed in the cheeks of the frame of the unwinding unit with a roll of film folded in two layers attached to it, the roll is mounted on the roll holder with the possibility of rotation together with the roll holder, the ends of which are installed in the nests of the frame cheeks, while between the cheeks with the possibility of rotation and interaction with the film, a perforator is located, the thermal knife has a magnet cup that interacts with an electromagnet mounted on the thermal knife stop, the thermal knife is installed with the possibility of To adjust its position in the vertical plane and mounted on the bed, the thermal knife is rotationally mounted on the axis of the thermal knife mounting, mounted on the thermal knife stop and has a mechanism for returning to the initial position, an electric motor is installed on the thermal tunnel connected to the air circulation means located in the thermal tunnel cavity in the thermal tunnel cavity, in which electric heaters are installed.