RU111106U1 - 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 is mounted a thermal knife and a former of the product block, with a conveyor located on both sides of the packaging module, the longitudinal axis of which is located across the axis of the module to its frame, at a right angle to the conveyor, a chain conveyor is docked, the frame of which is docked to the frame of the receiving roller table and there is a fan on it for blowing the product unit and a heat tunnel for heating the film, equipped with with at least one means of circulating heated air in the working cavity of the thermal tunnel, which is connected to an electric motor mounted on the housing of the thermal tunnel, the chain conveyor has a pair of closed flexible branches that are connected to each other by tracks, the end of each track being rigidly connected to the chain link conveyor, also on the frame of the packaging module in front of the thermal knife, in the direction of product movement, a feeding table is mounted on which the cutter included in the shaper is located to cut off a group of food units the share of the total product flow, a pusher for moving products beyond the working area of the thermal knife, a clamp and a curtain mounted on the module frame are movably mounted in the guides of the module frame, while the curtain, clip, pusher, cutter and thermal knife are connected to their corresponding moving pneumatic cylinders fixed to module frame, the line also contains a receiving table located between the thermal knife and the thermal tunnel; drive rollers are mounted on the module frame at the bottom and top, on which the upper and lower shrink coils are mounted

Description

This technical solution relates to lines for automatic group packaging in heat-shrinkable plastic film of food, chemical and other products (products) contained in glass, metal, paper or plastic containers, in particular, cans, bottles, cans, boxes, bags and the like. products.

This technical solution is intended for its use in the design of packaging lines that weld and cut heat-shrink film in the process of pre-packaging products, and such lines are equipped with a pneumatic knife and a shaper of product packaging, have a limiter for moving the film roll and an automatic film winding device. The line presented in this description is an angle line, designed primarily for its location in the corner areas of the packaging workshop.

Lines for packaging products in shrink film are known from the prior art, and each such line contains a shrink module, a packaging module, inlet and outlet conveyors, a film welding unit, upper and lower film unwinding units, automatic line operation control elements, roll unwinding device shrink film, packing table, product block former.

A device for packaging products in a film containing the nodes of the supply of the formed block of products in the packaging zone, the clamp for fixing the packaged products and shrink film on their upper plane, characterized in that it is additionally equipped with a node for feeding the products into the zone of formation 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 is 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 each other, and the cutting unit is equipped with a knife made with the possibility of its extension to perform 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 (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 2203841C1, 10.05 .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 circumferential planes formed by a lattice surface, and the thermal knife and the fan block are located around the circumference of the table near the countertop (RU 2148542С1, 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-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 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 frame, assemblies for unwinding a roll and packaging products into a film, means for welding film and a shaper of products into packages (WO 20060771103 A1, 07.27.2006; WO 2007080451 A2 07/19/2007; GB 1,421,977 A; 01/21/1976; US 3,583,888 A; 06/08/1971; US 3,578,839 A; 06/28/1971; US 4,104,848 A; 08/08/1978; US 4,945,707 A, 7/8/1990; US 4,945,707A, 07/08. 1990; FR 2062674 A5, 06/25/1971; FR 2617121 A1, 12/30/1988; DE 2822674 A1, 11/29/1979).

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 B2.15.15.2006).

Known technical solutions do not fully meet the increasing demands of improving packaging quality and productivity. This is due to the fact that the thermal tunnels installed in them have an unsatisfactory throughput. Also, well-known technical solutions do not meet the requirements for compact lines, which is associated with their layouts that solve other problems.

The technical result of the invention is to improve the quality of packaging and line performance. Another result of the invention is to increase 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 is mounted a thermal knife and a shaper of the product block, with a conveyor located on both sides of the packaging module, the longitudinal axis of which is transverse to the axis of the module, to its to the frame, at a right angle to the conveyor, a chain conveyor is docked, the frame of which is docked to the frame of the receiving roller table and there is a fan on it for blowing the production unit and thermoton To heat the film, equipped with at least one means of circulating heated air in the working cavity of the thermal tunnel, which is connected to an electric motor mounted on the body of the thermal tunnel, the chain conveyor has a pair of closed flexible branches that are connected to each other by tracks, with the end of each track it is rigidly connected to the conveyor chain link, also on the frame of the packaging module in front of the thermal knife, in the direction of production, the feeding table is mounted on which the cutter for I cut off a group of product units from the total product flow, a pusher for moving products beyond the working area of the thermal knife, a clip and a curtain mounted on the module frame mounted movably in the guides of the module frame, while the curtain, clip, pusher, cutter and thermal knife are connected to the corresponding pneumatic cylinders displacements fixed on the module frame, the line also contains a receiving table located between the thermal knife and the thermal tunnel; drive rollers are mounted on the module frame at the bottom and top, on which are mounted NJ and lower bay shrink film with possibility of their rotation around their own axes while rotating the rollers, and on top of the module frame mounted film tensioner.

The conveyor has a by-pass sprocket installed at one end of the conveyor and a drive sprocket mounted on its other end, connected by a branch of the track chain, and the conveyor shaft located near the packaging module is connected to the drive motor of the conveyor track chain.

The conveyor frame is connected to the frame of the packaging module by means of a frame located on the bottom side of the line under the conveyor and the feeding table.

A fence is mounted on the upper part of the thermal knife, which has a means of automatically activating it when it becomes possible to touch the operator’s hands on the thermal knife in the operating position of the thermal knife.

The fabric tensioner of the upper film bay is made in the form of a two-shouldered lever with a counterweight at one end and the middle part of the tensioner is pivotally connected to the frame of the packaging module, the opposite end of the tensioner is made in the form of a frame in which the heat-shrinkable film is located, and the film is stored between the bypass rollers, envelopes the tensioner frame and a movable bypass roller installed in the guides of the module frame, and the film is located in such a way that its branches running from the film coils are welded at the touch point of the therm knife with a permanently mounted on the frame of the module stop.

Figure 1 shows a line for packaging products in shrink film, 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 in side view; figure 4 - packaging module line in front view; figure 5 - packaging module line in a top view; figure 6 - packaging module in a spatial image; 7 is a diagram of the shrink film storage in the packaging module.

The line contains a packaging module 1 (Fig. 1), on which frame 2 a thermal knife 3 is mounted, while a chain conveyor 4 made of tracks is docked to the frame 2 (Fig. 2) located to the right and left of the packaging module 1.

Conveyor 4 together with other components of the packaging module forms a product supply unit included in the former 5 of the product block. A product block is understood to mean several units of products or products, or a plurality of product units combined in a film block.

Conveyor 4 is the receiving part of the packaging module, it receives each unit of output arriving at it and partially participates in the formation of the product block. The longitudinal axis of the conveyor 4 is located transverse to the axis of symmetry of the packaging module 1. To the frame 2 at a right angle to the conveyor 4 is attached a frame 6 of the chain conveyor 7, the closed branches of the chains of which are connected by tracks 8. The conveyor 7 has a drive 9 for moving its chains 10, which is fixed at the end frame 6, farthest from frame 2 of the packaging module. A receiving roller table 11 is attached to the conveyor frame 6, comprising a lattice frame 12 with guides 13, in which there are nests along the lengths of the ends of the removable rollers 14. The heat tunnel 15 is located approximately in the middle of the frame 6, which is fixed to this frame. Each rack of frames 2, 6 and 12 has a height-adjustable support 16 at the bottom.

On the frame 2 of the packaging module 1 in front of the thermal knife 3, in the direction of production, a feeding table 17 is mounted (Fig. 2) with a cut-off 18 located on it (Fig. 1), which serves to cut off a group of product units from the total product flow. The cutter is part of the shaper 5 products. The line has a pusher 19 (Fig.6) and guides for moving products when it moves to the thermal knife 3.

The thermal knife 3 (Fig. 4) is connected with the pneumatic cylinder 20 (Fig. 1) mounted on the frame 2 and moves the thermal knife. The cutter 18 is connected to the pneumatic cylinder 21 (FIG. 2) mounted on the feeding table 17 and displaced by the cutter. The pusher 19 is connected to the pneumatic cylinder 22 for moving the pusher fixed on the feeding table 17.

The conveyor 4 of the packaging module has a bypass sprocket 23 mounted on one end of the conveyor and a drive sprocket 24 mounted on its other end, connected by a branch of the track chain 25 moving along the guides 26. The sprockets are connected to the shafts 27 and 28. At the bottom of the conveyor 4, its track chain 25 supports roller 29. In this case, the shaft 27 located near the packaging module 1 is connected to the electric motor 30 of the drive of the conveyor track chain.

The thermal tunnel 15 (Fig. 1) is equipped with at least one means 31 for circulating heated air in the working cavity of the thermal tunnel formed by the walls of the thermal tunnel and its duct system. The circulation means 31 is located in the working cavity of the thermal tunnel, connected to an electric motor 32, mounted on the body of the thermal tunnel 15 above the circulation means 31. The design of the circulation means and the thermal tunnel, in their totality, have the original design and they are not disclosed in this description. In an example of the possibility of implementing the invention, as a means for circulating air in a thermal tunnel, any known impeller having blades can be used. A more specific implementation of the impeller is not given in this description, since it is an independent and independent solution. The functions of the indicated means for air circulation can also be performed by any other known means, for example, a fan driving air in the cavity of the heat tunnel in a given direction.

A fan 33 is mounted on the frame 6 for blowing the product block. The packaging module 1 contains a receiving table 34 (Fig. 1) located between the thermal knife 3 and the thermal tunnel 15. The conveyor frame 4 is connected to the frame 2 of the packaging module by means of a frame 35 (Fig. 1) located on the lower side of the line under the conveyor and the feeding table. On the frame 2 of the module, rails 36 are fixed (FIG. 2), in which the frame of the thermal knife 3 is located, and also on the frame 2 there is a clamp 37 connected to the pneumatic cylinder 38 for moving the clamp. The line has a shutter 39 (Fig. 4), movably mounted in the vertical guides 40 of the frame 2. The shutter is connected to the pneumatic cylinder 41 of its movement in the guides.

On the frame 2 (Fig. 1), at the bottom and at the top of the frame, drive rollers 42 are connected, connected to electric motors 43 of their rotation. On rollers 42, an upper shrink film roll 44 and a lower shrink film roll 45 are installed.

On the upper part of the frame 2 (Fig. 7), a film tensioner is installed, made in the form of a U-shaped frame 46. At the ends of the frame there are movable counterweights 47, the middle part of the frame 46 is pivotally connected to the frame 2, the opposite end 48 of the tensioner is in contact with the the heat-shrinkable film web 49. The film is stored between the bypass rollers 50 (Fig. 7), it envelops the end 48 of the tensioner frame 46 and the movable lower bypass roller 50 mounted movably in the guides of the frame 2, while the film is positioned so that its branches run guides with inlets 44 and 45 are welded to a transverse weld 51 in place termonozha nip 3 against a stop 52. The focus 52 is fixedly mounted on the frame 2 of the packaging unit has a spring-loaded upper part is a separate part termonozha and operatively associated with it.

The aforementioned circulation means 31 is located in the working cavity 53 of the thermal tunnel, in which electric heaters 54 are also located. The cut-off 18 (Fig. 6) in its upper part has production flow dividers 55. A control unit 56 is also mounted on the frame 2 of the packaging module 1, comprising electrical controls for the conveyor 4, the thermal knife 3, the cutter 18, the pusher 19, the clamp 37, the shutter 39 and the drive rollers 42 for unwinding the film.

A control unit 57 (Fig. 1) is mounted on the frame 6 of the chain conveyor 7, containing control elements for the heating elements of the heat tunnel 15, the electric motor 32, the air circulation means 31 in the cavity of the heat tunnel, and the fan 33.

The coils of the film are fixed on the roll holders 58, on which they are fixed from the possibility of falling. On the roll holders 58 are latches 59, fixing the film bay in the working position. The bays are installed with the possibility of rotation around their own axes during rotation of the rollers.

On the upper part of the thermal knife 3, a fence 60 is fixed (Fig. 4), which excludes touching the operator’s hands on the thermal knife in the predetermined position of the thermal knife. The guard is triggered by a safety sensor.

The packaging line operates as follows. The units of production moving along the conveyor 4 (figure 2), are divided by a divider 55, at least two streams of units of production. If two dividers are installed on the conveyor, then production units are divided into three product flows.

As the conveyor 4 fills, the separated product flows abut against the cutter 18, the conveyor filling limit switch is actuated, and the pneumatic cylinder 21 of the cutter 18 moves the cutter away from the conveyor 4, while the product group moves the conveyor 4 forward to the packaging module 1 and fill the space in front of the pusher 19 (figure 1).

After that, the cutter 18 is moved to the conveyor 4 in the initial position and separates the new product group from the main product stream. The shutter 39, which keeps the product from getting into the working area of the thermal knife 3, will lower to the lower position with the pneumatic cylinder 41, which is connected with the shutter and frame 2. The pusher 19, connected with the pneumatic cylinder 22 fixed on the feeding table 17, will move the product group to the table 34 from the action of the latter , on which it is held against displacement by the clamp 37 and is wrapped with a film as shown in Fig.7. After that, the thermal knife 3, when it interacts with the stop 52, the lower film web 49 is welded to the upper film web 49 with a weld 51.

In this case, the product group is converted into a product block 54 wrapped in a packaging film (Fig. 7). When welding canvases of the film 49, the product block is compressed by the film, its tension around the product, welding of the film canvases and the segment of the film of the product block from the common film web. In this case, before welding the film, the products wrapped with film, clip 37 (Fig. 1) are pressed to the module table from the action of the pneumatic cylinder 38 and are in a position fixed on the table during welding of the film. Before welding the film, when the product is pressed to the table with a clamp, the pusher 19 and the shutter 39 by the pneumatic cylinders return to their original position. After welding the film, the upper strap of the thermal knife and thermal knife 3, as well as the clamp 37 are returned to their original upper position.

In the process of packaging the product blocks with film, the lower and upper branches of the film 49 (Fig. 7) from the action of automatically switched on electric motors 43 (Fig. 3) are unwound in predetermined directions due to the rotation of the rollers 42 and due to the rotation of the rolls 44 and 45 mounted on the rollers 42.

Then the described cycle of operation of the wrapping unit is repeated in automatic mode, with each subsequent product block pushing each previous product block along the conveyor 7 into the cavity of the thermal tunnel 15.

In a thermal tunnel, the film is heated to a predetermined temperature for a predetermined period of time. After the heat tunnel at the exit from it, the film of the product block cools and due to its properties the process of heat shrinkage of the film occurs. Due to heat shrinkage, the surface of the product block 54 is compressed by a film. From the heat tunnel, the packaged product block 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 33. In the process of cooling the film, it shrinks and compresses the product block from all sides. Then the product block from the receiving roller 11 is transported to the storage location.

During the operation of the line, the performance of which depends on the throughput of the heat tunnel, the circulation means 31 constantly circulates hot air in the air ducts of the heat tunnel and its cavity 53, mixes it with less heated air coming from below through the open opening of the heat tunnel, provides intensive heat exchange in the working cavity and creates each of its zones constancy of a given 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 the film heating, the unevenness of its heat shrinkage, tension and thermal stresses in it, leading to local breaks and microscopic negative changes in the structure of the film .

When using hot air circulation means installed in the heat tunnel in the line, the quality of the package leaving the heat tunnel is significantly improved by eliminating the possibility of local breaks and changes in the film structure, and the speed of high-quality heating of the film is significantly increased. This allows you to increase the throughput of the thermal tunnel and, accordingly, the performance of the line as a whole. The compactness of the line is obtained due to the compact packaging module, parts of which are maximally located in vertical mutually intersecting planes. As a result of this, the packaging module has the smallest possible dimensions, allowing the other components of the line to be most compactly docked to it.

The technical solution was used in the design of the packaging line UM-1 "Automatic".

Claims (5)

1. A line for packaging products in shrink film, characterized in that it contains a packaging module, on the frame of which is mounted a thermal knife and a former of the product block, with a conveyor located on both sides of the packaging module, the longitudinal axis of which is located across the axis of the module to its frame, at a right angle to the conveyor, a chain conveyor is docked, the frame of which is docked to the frame of the receiving roller table and there is a fan on it for blowing the product unit and a heat tunnel for heating the film, equipped with with at least one means of circulating heated air in the working cavity of the thermal tunnel, which is connected to an electric motor mounted on the body of the thermal tunnel, the chain conveyor has a pair of closed flexible branches that are connected to each other by tracks, the end of each track being rigidly connected to the chain link conveyor, also on the frame of the packaging module in front of the thermal knife, in the direction of production, the feeding table is mounted on which the cutter included in the shaper is located to cut off a group of food units the share of the total product flow, a pusher for moving products beyond the working area of the thermal knife, a clamp and a curtain mounted on the module frame are mounted movably in the guides of the module frame, while the curtain, clip, pusher, cutter and thermal knife are connected to their corresponding moving pneumatic cylinders fixed to module frame, the line also contains a receiving table located between the thermal knife and the thermal tunnel, drive rollers are mounted on the module frame at the bottom and top, on which the upper and lower shrink coils are mounted oh film with possibility of their rotation around their own axes while rotating the rollers, and on top of the module frame mounted film tensioner. 2. The line according to claim 1, characterized in that its conveyor has a bypass sprocket installed on one end thereof and a drive sprocket mounted on its other end, connected by a branch of the track chain, while the conveyor shaft located near the packaging module is connected to the drive motor track chain conveyor. 3. The line according to claim 1, characterized in that the conveyor frame is connected to the frame of the packaging module by means of a frame located on the lower side of the line under the conveyor and the feeding table. 4. The line according to claim 1, characterized in that a guard is mounted on the upper part of the thermal knife, having a means of its automatic actuation when it becomes possible to touch the operator’s hands with the knife in the working position of the knife. 5. The line according to claim 1, characterized in that the web tensioner of the upper film bay is made in the form of a two shoulders lever with a counterweight at one end thereof, and the middle part of the tensioner is pivotally connected to the packaging module frame, the opposite end of the tensioner is made in the form of a frame in which a shrink film web is located, the film being stored between the bypass rollers, it goes around the tensioner frame and the movable bypass roller installed in the module frame guides, and the film is located so that its branches run off from film coils are welded at the point of contact of the thermal knife with a stop fixed on the module frame.