RU111108U1 - 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 there is a thermal knife, an emphasis is placed under the thermal knife, the thermal knife and the stop are connected to their pneumatic cylinders in the vertical guides of the module frame, which contains a box fixed to the frame of the module, the collar, made in the form of a three-dimensional structure from a bar bent in several planes, the box and collar form a knot for shaping the film sleeve, while the collar covers on all its sides and the end parts of the collar are located crosswise with respect to each other, while the intersecting parts of the collar are located under the box, and the rounded part of the collar is located above the box, in the opening of the module frame under its upper strapping there is a hair dryer for supplying hot air to the film welding zone , the hair dryer is pivotally mounted on the module frame from its lower side, connected to the pneumatic cylinder of its automatic rotation to the vertical working position, while the line contains a feed roller table and an intermediate roller table attached to the packaging module, located behind the intermediate roller conveyor of the drive chain conveyor, with a thermal tunnel fixed to the conveyor frame, the receiving roller conveyor frame docked to the conveyor frame, two roller pulling units mounted in series on the module frame to move the product along the line, in the cavity heat tunnels installed electric heaters and at least one drive means for circulating hot air in the cavity of the heat tunnel, while on the top of the module frame

Description

This technical solution relates to packaging machines for automatic packaging of long and molded products: lining, timber, floorboards, metal structures, finished furniture elements into heat-shrinkable polyethylene film. The technical solution is intended for its use in line designs equipped with a pneumatic drive system for line units, a forming unit for forming product packages, a thermal tunnel, a receiving and an intermediate roller table.

From the achieved level of technology, heat-shrink equipment for packaging various types of products is known, each of which contains a module for packaging products in heat-shrinkable plastic film having the properties of its compression when heated, a heat tunnel, a thermo knife with a pneumatic drive, a device for fixing the package, automatic film winders, supply and outlet conveyors, film welding unit, upper and lower film unwinding units, shaper of packaging and pneumatic drive of thermal knife and shaper of packaging.

There are known designs of lines for packaging products in shrink film, in particular, a method and device for packing items located in one or more rows in a shrink film, in which objects are wrapped with two film tapes, are welded using a welding clamp, then the objects 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 welding The th clamp moves down to complete wrapping the films around objects; the welding clamp finally pulls the top film. Parts of the film protruding beyond the objects are subjected to 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 (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 circumferential 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-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 feed and output conveyor, a heat chamber and means for forming package tori, 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).

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 meet the conditions of increasing requirements for their compactness, performance and packaging quality.

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

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, a stop is located under the thermal knife, the thermal knife and stop are connected to their pneumatic cylinders in the vertical guides of the module frame, which contains the box fixed on the module frame, a collar made in the form of a three-dimensional structure from a bar bent in several planes, a box and a collar form a knot for forming a film sleeve, with the collar covers the box on all its sides and the end parts of the collar are located crosswise with respect to each other, while the intersecting parts of the collar are located under the box, and the rounded part of the collar is located above the box, in the opening of the module frame, under its upper trim, there is a hair dryer hot air into the film welding zone, the hair dryer is pivotally mounted on the module frame from its lower side, connected to the pneumatic cylinder of its automatic rotation to the vertical working position, while the line contains a feed a chain linker and an intermediate roller table attached to the packaging module, located behind the intermediate roller table of the drive chain conveyor, with a thermal tunnel fixed to the conveyor frame, a receiving roller table docked to the conveyor frame, two roller pulling units installed in series along the product direction to move the product along lines, electric heaters and at least one drive means for circulating hot air in the cavity of the thermal tunnel are installed in the cavity of the heat tunnel, at On the upper part of the module frame on the drive rollers, a shrink film coil is installed with rotation, the line contains a film tensioner interacting with the film, and the tensioner is located on the upper part of the module frame above the film roll.

The thermal tunnel contains at least two interconnected sections. Each rack of each frame has a screw support, adjustable in height, at the bottom. Each pulling unit contains pulling rollers driven by an electric motor, between which an opening is formed for passing products through it.

The circulation means is connected to an electric motor mounted on the upper wall of the thermal tunnel above the circulation means. The tensioner is made according to the principle of a two-shouldered lever pivotally mounted on the upper part of the frame with the middle part, while a counterweight is movably mounted on one end of the tensioner and the tensioner has a frame formed by a U-shaped contour of the counterweight for the film to pass through it.

Figure 1 shows the automatic 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 - site promotion block product, front view; figure 4 is a view of figure 3; figure 5 - hair dryer for supplying hot air to the place of welding of the film; figure 6 - frame of the packaging module with a thermal knife fixed to it, emphasis, hairdryer, duct and collar; Fig.7 is a frame of the packaging module in an inverted form, a view of the frame from the bottom.

The line contains a packaging module 1 (Fig. 1), on the frame 2 of which there is a thermal knife 3, a box 4 and a collar 5 fixed on the frame, which are part of the forming unit. In the opening of the frame 2, under the upper trim of the frame, there is a hairdryer 6 for supplying hot air to the film welding zone.

The line contains a feed roller 7 mounted on the frame 8, an intermediate roller 9 mounted on the frame 10, located behind the roller 9, a chain conveyor 11 mounted on the frame 12, while the chain conveyor 11 has a pair of closed flexible branches connected to each other by tracks 13 forming a moving track moving products along the line. The conveyor 11 has an electric drive 14 for moving its flexible closed branches, which is mounted on the end of the frame 12, the farthest from the frame 2 of the packaging module.

A thermal tunnel 15 is mounted on the frame 12, consisting of at least two identical sections interconnected. The frame 16 of the receiving roller table 17 is docked to the frame 12. Each rack of each said frame has a screw support 18 adjustable in height at the bottom.

An emphasis 19 is located under the thermal knife 3, while the thermal knife 3 and the emphasis 19 are connected to the pneumatic cylinders 20 of their movement in the vertical guides of the frame 2 (Fig. 6). On the frame 2 of the packaging module, two roller pulling units 21 (Figs. 3, 4) are installed sequentially in the direction of the product movement for moving products along the line. Each node 21 contains a drive roller 23 driven by an electric motor 22 (FIG. 3), between which an opening 24 is formed for passing through it products to be wrapped with a film.

Hair dryer 6 is pivotally mounted on frame 2 (Fig. 5) and is located below in the frame opening with the possibility of automatic rotation to a vertical working position, in which a stream of hot air from the hairdryer nozzle directed upward passes through the frame opening and enters the packaging film. The hair dryer is connected to the pneumatic cylinder 25 of its rotation.

The forming unit containing the box 4 fixed on the frame 2 of the module (Fig. 6) and the collar 5 covering the box is used for forming from the film of the film sleeve. A film sleeve is formed to introduce products into it during the packaging process. To do this, the collar 5 covers the box 4 from all sides and the end parts 26 of the collar (Fig. 7) are located cross-hairs with respect to each other, while the intersecting end parts 26 of the collar 5 (Fig. 7) are located under the box. Collar 5 has a rounded portion 27 located above the duct. The collar is made of a rod bent in several planes and is a complex three-dimensional structure.

In each cavity 28 (Fig. 1) of each section of the heat tunnel 15, electric heaters 29 and at least one drive means 30 for circulating hot air are installed in the cavity 28 of the section of the heat tunnel and its ducts. The circulation means 30 is connected to an electric motor 31 mounted on the upper wall of the section of the thermal tunnel 15. The electric motor 31 is located above the circulation means, the construction of which is not disclosed. 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. The functions of the indicated means of 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.

On the upper part of the frame 2, the roll 33 of the heat-shrinkable film 34 is rotatably mounted on the rollers 32. The rollers 32 are driven by their rotation from the electric motor 35. In the packaging module, after the shaper passes, the film web is folded by the shaper collar and converted into a sleeve. In the working position of the line, the film is tucked on the collar 5 and encompasses the box 4, and after it is run off from the bay, it first passes through the tensioner 36. The tensioner has a U-shape and is made according to the principle of a two-shouldered lever pivotally mounted on the frame with the middle part, while A counterweight 37 is mounted movably with a possibility of fixation at one end of the tensioner, and at the other end, the tensioner has a frame formed by a U-shaped contour for the film web to pass through it. Hair dryer 6 is installed in the opening 38 of the frame (Fig.7) with the possibility of rotation in this opening. The film 34, escaping from the bay 33, envelops the bypass roller 39 (figure 1).

On the frame 2 of the packaging module 1, a control unit 40 for controlling the pulling roller 32 for unwinding the film, the rollers 23 for the pulling knots 21, the pneumatic cylinders for moving the thermal knife 3 and the stop 19, and the pneumatic cylinder 25 for turning the hair dryer 6 are mounted.

On the frame 6 of the chain conveyor 7, a control unit 41 for heating elements 29 of the thermal tunnel 15, an electric motor 31, means 30 for circulating air in the cavity of the thermal tunnel, and also a fan 42 for blowing tracks 13 of the chain conveyor 11 mounted on the frame 12 is mounted.

The line works as follows. The products, for example, lengthy stacked boards (product block), are fed into the first roller pulling unit 21 (FIG. 1), which captures this product block and feeds it into the box 4. The product block passes through the box 4 and the collar 5 and at the exit from the box it falls into the sleeve of the film formed by the collar. This happens in such a way that the production unit first carries the film sleeve and pulls it along, while unwinding the bay 33. The film canvas is carried away by the product, passes through the collar 5 (Fig. 6) and folds into an open sleeve, which wraps the product in such a way that the longitudinal edges of the film overlap with respect to each other. At the same time, the overlapping edges of the film are located under the production unit wrapped in a film.

When such a product block moves over the hairdryer 6, the hairdryer rotates the cylinder 25, the hairdryer rotates into a vertical position and through the frame opening delivers a stream of hot air to the product block moving above it. In this case, the overlapping edges of the film are welded, and a longitudinal weld of the film is formed. As the packaging unit moves through the box 4, it passes through the working area of the thermal knife and is captured by the second roller pulling unit 21. After the product block leaves the second roller pulling unit 21 on the intermediate roller table 9, both pulling units stop, the pneumatic cylinder 25 transfers the dryer to its original horizontal position, stopping to weld a longitudinal seam, they are triggered from the pneumatic cylinders 20 of the thermal knife 3 and the stop 19 (Fig. 1), which cuts the film of the packaging unit from the film sleeve. In this case, the film is welded, located at the end of the packaging unit and the sleeve of the film, after which the thermal knife 3 and the stop 19 return to their original position and the cycle of the line is repeated.

After packaging each subsequent product unit with a film, it pushes each previous product unit from the intermediate roller table 9 towards the heat tunnel 15, the unit enters the chain 13 of the conveyor 11, which moves the packaging unit into the heat tunnel 15, where the film of the product unit heats up, shrinks and compresses the unit.

After exiting the heat tunnel, the product block enters the receiving roller 17 and cools, as a result of which it additionally shrinks and cures, tightly fitting the block on all sides.

During the operation of the line, the performance of which depends on the throughput of the thermal tunnel, the circulating means 30 constantly circulates hot air in the thermal tunnel ducts and in its cavity, mixes it with a less heated air mass, provides intensive heat exchange in the working cavity 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 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.

When using the hot air circulation means installed in the heat tunnel in the line, the quality of the package coming out of 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, its compactness and, accordingly, the compactness and productivity of the line, while the dimensions of the line are significantly reduced. The technical solution was used in the design of the design of the packaging line UM-1 "Line" automatic.

Claims (6)

1. A line for packaging products in shrink film, characterized in that it contains a packaging module, on the frame of which there is a thermal knife, an emphasis is placed under the thermal knife, the thermal knife and the stop are connected to their pneumatic cylinders in the vertical guides of the module frame, which contains a box fixed to the frame of the module, the collar, made in the form of a three-dimensional structure from a bar bent in several planes, the box and collar form a knot for shaping the film sleeve, while the collar covers on all its sides and the end parts of the collar are located crosswise with respect to each other, while the intersecting parts of the collar are located under the box, and the rounded part of the collar is located above the box, in the opening of the module frame under its upper strapping there is a hair dryer for supplying hot air to the film welding zone , the hair dryer is pivotally mounted on the module frame from its lower side, connected to the pneumatic cylinder of its automatic rotation to the vertical working position, while the line contains a feed roller table and an intermediate roller table attached to the packaging module, located behind the intermediate roller conveyor of the drive chain conveyor, with a thermal tunnel fixed to the conveyor frame, the receiving roller conveyor frame docked to the conveyor frame, two roller pulling units mounted in series on the module frame to move the product along the line, in the cavity electric heaters and at least one drive means for circulating hot air in the cavity of the thermal tunnel are installed on the thermal tunnel, while on the top of the module frame a roll of heat-shrinkable film is mounted on the drive rollers, the line contains a film tensioner that interacts with the film, and the tensioner is located on the top of the module frame above the film roll. 2. The line according to claim 1, characterized in that the thermal tunnel contains at least two interconnected sections. 3. The line according to claim 1, characterized in that each rack of each frame has a screw support adjustable in height at the bottom. 4. The line according to claim 1, characterized in that each pulling unit contains pulling rollers driven by an electric motor, between which an opening is formed for products to pass through it. 5. The line according to claim 1, characterized in that the circulation means is connected to an electric motor mounted on the upper wall of the heat tunnel above the circulation means. 6. The line according to claim 1, characterized in that the tensioner is made according to the principle of a two-shouldered lever pivotally mounted on the upper part of the frame with the middle part, while a counterweight is movably mounted for fixation at one end of the tensioner, and the tensioner is formed at the other end the contour of the counterweight frame for passing through it the canvas of the film.