RU111111U1 - 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, while the module frame contains a rack with a pneumatic cylinder attached to it, connected to a rotary L-shaped frame, pivotally connected to the module frame , a L-shaped thermal knife is installed on the frame, a feeding table located in front of the thermal knife is mounted on the module frame with the possibility of its lateral movement relative to the module frame, a roll folded in of a layer of heat-shrinkable film with the possibility of rotation around its own axis, a brake shoe is mounted on the module frame, interacting with the roll to slow down the roll during unwinding of the film, a separator in two layers of film is installed on the feeding table, a L-shaped spring-loaded spring is installed on the module frame relative to this frame, the stopper for the thermal knife, having a trough-shaped cross section, is mounted on the module frame with the possibility of rotation on the axis of a perforator for perforation in the film of holes throughout the line, also on the module frame with the possibility of vertical movement relative to the horizontal plane, a belt conveyor is mounted to divert products from the working area of the thermal knife after welding and film cuts, the line contains a chain conveyor, on the frame of which a thermal tunnel and a receiving roller conveyor are fixed, the chain conveyor has a pair of closed flexible branches which are connected to each other by tracks, the end of each track being rigidly connected to the chain link of the conveyor, heaters and circus means are mounted in the cavity of the heat tunnel

Description

This technical solution relates to packaging machines for automatic packaging in heat-shrinkable plastic film of products moving in the forward direction and the possibility of changing this direction to the appropriate angle. The technical solution is intended for its use in the construction of modules of such lines that are equipped with pneumatic drives of the thermal knife and the shaper of the product packaging, a limiter for the movement of the film roll and an automatic film winding device.

From the prior art, there are known lines for packaging in shrink film of products, each of which contains a shrink module, a packaging module, inlet and outlet conveyors, a film welding unit, upper and lower film unwinding units, and automatic line operation control elements

Line designs for packaging products in shrink film are known from patent documentation, in particular, a method and device for packing items arranged in one or more rows into a shrink film, in which items are wrapped with two film tapes, are welded using a welding clamp, then objects are moved to two film tapes with a pusher, which at the end of the feeding movement stretches these film tapes, while each of the film tapes is immovably held by a hose brake Zoom, wherein when the sealing jaw executes downward movement to complete the wrapping film around the object, welding the 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).

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 between with these welds, a unit for feeding the formed block of products into the packaging zone and a clamp for fixing the packed products and shrink film along their upper plane, distinguishing 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 product block, 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 film cutting (RU 71630 U1, 03.20.2008).

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. 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 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-shrinkable passage chamber with a conveyor is located behind the thermal knife, and the steering wheel 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, comprising a film feeding mechanism, a thermal knife cutting film, a feed and an output conveyor, a heat chamber and means for forming packaging ends, while the cutter 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 lines do not satisfy the increasing requirements for their productivity and packaging quality, as well as for the requirements for increasing the compactness of lines.

The technical result presented in this description of the invention is to improve the quality of packaging and line performance. Another result is increased line compactness.

The technical result was obtained by a line for packaging products in shrink film, characterized in that it contains a packaging module on which a thermal knife is mounted, and the module frame contains a rack with a pneumatic cylinder attached to it, connected to a rotary L-shaped frame, pivotally connected to the frame module, a L-shaped thermal knife is installed on the frame, a feeding table located in front of the thermal knife is mounted on the module frame with the possibility of its lateral movement relative to the module frame, on the end of the module frame a roll of heat-shrink film folded in two layers is installed with the possibility of rotation around its own axis, a brake shoe is mounted on the module frame, interacting with the roll to brake the roll during unwinding of the film, a separator of the film folded in two layers is installed on the feeding table, the module frame is installed An L-shaped spring-loaded emphasis relative to this frame, having a trough-shaped in cross section, is mounted on the module frame with a possibility of rotation on the axis of a perforator for perforation in the film along its entire length, also on the module frame with the possibility of vertical movement relative to the horizontal plane, a belt conveyor is mounted to divert products from the working area of the thermal knife after welding and film cuts, the line contains a chain conveyor, on the frame of which a thermal tunnel and a receiving roller conveyor are fixed, the chain conveyor has a pair of closed flexible branches that are connected to each other by tracks, and the end of each track is rigidly connected to the chain link of the conveyor, the roller conveyor frame has guides in which nests are made in the line with the ends of the removable rollers located in them, and heaters and air circulation means are mounted in the cavity of the thermal tunnel in the cavity of the thermal tunnel, which is connected to the rotation motor of the circulation means.

The roll is mounted on rollers fixed to the module frame, the brake shoe is mounted on a one-arm lever, one end of which is pivotally connected to the module frame, and a counterweight is located on the other end of the lever with the possibility of movement and fixing.

The thermal knife contains a heating element mounted in a housing having movable enclosing plates in a vertical direction relative to the thermal knife, the plates are rigidly connected by holders that are connected to the L-shaped frame, a spring-loaded rod connected to the L-shaped frame is located in the holder.

Figure 1 shows the line for packaging 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 is a side view of the line; figure 4 is a line in a spatial image; figure 5 - packaging module in front view; figure 6 is a top view of the packaging module; 7 is a side view of the packaging module; on Fig - thermal knife, front view; figure 9 - thermal knife, top view; figure 10 - thermal knife in a spatial image; figure 11 is a section aa in figure 9; in Fig.12 - emphasis under the thermal knife; in Fig.13 is a section bB in Fig.12; on Fig - view of the emphasis from above, a fragment; on Fig - scheme of the storage (refueling) of the film between the elements of its supply to the thermal knife; on Fig - section bb in Fig.15 (folded in two layers of film, escaping from a roll); on Fig - a device for attaching a thermal knife to the supporting elements of the packaging module in a spatial image.

The packaging line contains a packaging module 1, on a frame 2 (Fig. 1) of which assemblies are mounted for packaging products and welding the film, while the frame 2 contains a rack 3 for attaching to it a drive for turning the knife. Swivel L-shaped frame 4 is connected by hinges to the frame 2 at its own ends (Figs. 1, 3, 4). A L-shaped thermal knife 5 is mounted on the frame 4. On the rack 3, the body of the pneumatic cylinder 6 is pivotally fixed, the rod of which is pivotally connected to the L-shaped frame. The thermal knife 5 is located in the inner contour of the L-shaped frame 4. On the frame 2 is mounted a feed table 7 located in front of the thermal knife 5 (Fig. 1), which is located on the frame 2 with the possibility of its lateral movement relative to the frame 2. On the frame 2, a heat-shrink roll 8 is installed film with the possibility of rotation around its own axis, as well as on the frame 2 mounted brake shoe 9 (Fig), interacting with the axis of rotation of the roll or with the roll holder with the aim of braking the roll during unwinding of the film.

A divider or separator 10 of a double-folded film (FIGS. 1, 15) is installed on the feeding table 7, behind the feeding table 7, an electric motor 11 (FIG. 6) of the conveyor belt 12 (FIG. 1) is located in the direction of the film and production. The conveyor is mounted with height adjustment relative to the frame 2. The module contains a L-shaped stop 13 (Fig. 7, 12-14), spring-loaded with springs 14 relative to the frame 2. The stop 13 in cross section has a trough-like shape (Fig. 13). The thermal knife 5 (Fig.6, 7) contains a heating element 15 (Fig.11), mounted in the housing 16 of the thermal knife. The thermal knife has a guard plate 17 located on the housing with the possibility of movement in the vertical direction relative to the housing 16. The plates are rigidly connected to the holders 18, which are connected to the L-shaped frame 4. In the holder 18 is a spring-loaded rod 19 connected to the L-shaped frame 4. The plates 17 protect the operator’s hands from touching the body of the thermal knife 16.

On the frame 2 of the module is mounted on an axis rotatably perforator 20 (Fig.15) for perforation in the film of holes along its entire length. Holes in the film are necessary for air to escape from the film during shrinkage.

A frame 21 is attached to the frame 2 (Fig. 1), in the middle part of which a thermal tunnel 22 is fixed. The frames 2 and 21 are joined to each other so that the upper edge of the conveyor belt and the upper edge of the conveyor belt are in the same horizontal plane. In the cavity 23 of the thermotunnel, heaters 24 and means 25 for circulating air in the cavity of the thermotunnel are mounted, which is connected to the electric motor 26 of rotation of the means 25. As a means of circulation, the original impeller (is not disclosed) is used in the invention, and for carrying out the invention as means of air circulation in the thermotunnel can be used known fan (impeller), which provides the movement of hot air in the cavity 23 in a given direction.

The film roll 8 (Fig. 15) is mounted on rollers 27. The brake shoe 9 is mounted on a single-arm lever 28, one end of which is pivotally connected to the module frame 2, and a counterweight 29 is located on the other end of the lever with the possibility of movement and fixing. 1, a control unit 30 (Fig. 1) for controlling the conveyor belt 12, the thermal knife 5 and the pneumatic cylinder 6 for moving the thermal knife is mounted. A block 32 for controlling the heating elements of the thermal tunnel 22, an electric motor 26, air circulation means 25 in the cavity of the thermal tunnel and a fan 33 mounted on the frame of the roller table 34 is mounted on the frame 21 of the chain conveyor 31. The fan is located behind the thermal tunnel 22 (Fig. 1), above the rolling table 34 and conveyor 31, in the direction of the product block. The fan 33 is used to cool the packaging film heated in the heat tunnel.

The chain conveyor 31 has an electric motor 35 for moving its chain flexible closed branches interconnected by tracks 36 (FIG. 2). The electric motor 35 (Fig. 1) is fixed at the end 37 of the frame 21, the farthest from the frame 2 of the packaging module.

A receiving roller 34 is connected to the frame 21, comprising a frame 38 with upper guides, in which there are nests along the lengths of the ends of the plurality of removable rollers 39 located in them (FIG. 2). The frame 38 is a console connected to the frame 21, while the frame 38 is a continuation of the frame 21 and they are interconnected so that the load received by the frame 38 is transmitted to the frame 21.

The heat tunnel 22 is fixed approximately in the middle part of the frame 21. A thermal working cavity is made in the body of the heat tunnel for heating the shrink film. In the lower part, the thermal tunnel has an open opening and a conveyor 31 is located in it along its entire length, which covers this opening with tracks 36 (Fig. 2). Each rack of frames 2 and 21 has a height-adjustable support 40 at the bottom. In FIG. 15, shrink film is shown at 41.

The line works as follows. The film 41 spread by the separator 10 is arranged around the feeding table 7 (Fig. 15) and cut off with its transverse part of the thermal knife 5, and a film sleeve is formed that is glued from one end. When stretching the film around the table 7, the punch 20 (Fig. 15) makes holes in it. Place the product in the half sleeve of the film and move it in the half sleeve to the conveyor belt 12 (figure 4). The pneumatic cylinder 6 for turning the thermal knife 5 (Fig. 4) is actuated, which lowers the thermal knife to the stop 13 (Fig. 7), welds the half-sleeve film and cuts off the half-sleeve from the main film web, after which the thermal knife returns to its original position. In this case, the product is in a film bag, and on the main fabric or on the initial part of the film fabric, a weld will be formed of the lower and upper layers of the film for the next package. After the knife returns to its original position, the belt conveyor 12 is turned on, and the packaging unit is moved by the conveyor 31 to the heat tunnel 22, where the film is heated and heat-shrinked in its cavity 23. When the film shrinks in the heat tunnel, air escapes from the enclosed space of the film through the holes made in the film by the puncher 20. After leaving the heat tunnel, the product film cools and due to its properties, the film shrinks. Due to heat shrinkage, the surface of the product is compressed by a film. From the heat tunnel, the packaged products are pushed by the tracks 36 (Fig. 2) of the conveyor 31 onto the rollers 39 of the receiving roller table 34 (Fig. 1), where the hot film is cooled by the fan 33. During the cooling of the film, it shrinks and compresses the product block from all sides. Then the products from the take-up roller table 34 are transported to the storage location. During the operation of the line, the performance of which depends on the throughput of the thermal tunnel, the circulation means 25 constantly circulates hot air in the thermal tunnel ducts and in its cavity 23, 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 shrink film that wraps the product is uniformly heated over the entire surface of the product in contact with heated air, which eliminates the unevenness of the heating of the film, the unevenness of its shrinkage and tension, and thermal stresses in it, leading to local breaks and microscopic negative changes in the structure of the film. 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.

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 increased, while the quick heating of the film in the heat tunnel allows you to increase the throughput of the heat tunnel, its compactness and, consequently, increase the productivity and compactness of the line. The technical solution was used in the design of the packaging line UM-2 "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, while the module frame contains a rack with a pneumatic cylinder attached to it, connected to a rotary L-shaped frame, pivotally connected to the module frame , a L-shaped thermal knife is installed on the frame, a feeding table located in front of the thermal knife is mounted on the module frame with the possibility of its lateral movement relative to the module frame, a roll folded in of a layer of heat-shrinkable film with the possibility of rotation around its own axis, a brake shoe is mounted on the module frame, interacting with the roll to slow down the roll during unwinding of the film, a separator in two layers of film is installed on the feeding table, a L-shaped spring-loaded spring is installed on the module frame relative to this frame, the stopper for the thermal knife, having a trough-shaped cross section, is mounted on the module frame with the possibility of rotation on the axis of a perforator for perforation in the film of holes throughout the line, also on the module frame with the possibility of vertical movement relative to the horizontal plane, a belt conveyor is mounted to divert products from the working area of the thermal knife after welding and film cuts, the line contains a chain conveyor, on the frame of which a thermal tunnel and a receiving roller conveyor are fixed, the chain conveyor has a pair of closed flexible branches which are connected to each other by tracks, the end of each track being rigidly connected to the conveyor chain link, heaters and circus means are mounted in the cavity of the heat tunnel lyatsii air heat tunnel into the cavity, which is connected with means for circulating the rotation motor. 2. The line according to claim 1, characterized in that the roll is mounted on rollers mounted on the module frame, the brake shoe is mounted on a one-arm lever, one end of which is pivotally connected to the module frame, and a counterweight is located on the other end of the lever with the ability to move and fix . 3. The line according to claim 1, characterized in that the thermal knife contains a heating element mounted in a housing having movable enclosing plates in a vertical direction relative to the thermal knife, the plates are rigidly connected by holders that are connected to the L-shaped frame, a spring-loaded rod is located in the holder, associated with the L-shaped frame.