RU122367U1 - LINE FOR PACKING PRODUCTS IN HEAT SHRINKING FILM - Google Patents

Abstract

A line for packaging products in shrink film, containing a packaging module, a conveyor for feeding products into a packaging module, a receiving roller conveyor, a conveyor for moving products from the packaging module to a receiving roller table and a heat chamber covering the conveyor, while the packaging module includes a vertically located frame, on which the thermal knife is installed with the ability to move along the vertical racks, the table, the clamp and the upper and lower units for unwinding the film are also fixed on the frame of the packaging module, and a stop for the thermal knife is located on the table and a pusher and a cutter are installed with the possibility of reciprocating movement, each of which connected with its drive, and between the stop for the thermal knife and the conveyor, a shutter is installed with the possibility of vertical reciprocating movement in the guides, associated with the drive, characterized in that the guides in which the curtain is installed are fixed on the conveyor frame.

Description

The utility model relates to lines for automatic group packaging in heat-shrinkable plastic film of food, chemical and other products contained in glass, metal, paper or plastic containers, in particular, cans, bottles, cans, boxes, bags and other products.

A device for packaging products in shrink film according to the patent RU 5171 U1. The device includes a mechanism for supplying products, comprising a fixed frame and a movable horizontal pan, a roll holder, a welding mechanism, a heat chamber and a control panel. The welding mechanism is made in the form of a spring-loaded thermal knife, pivotally connected to the rear wall of the fixed frame.

From the document RU 2203841 C1, a device is known for packaging products in a shrink film containing a core, an unwinding device, a packing table, a clamping jaw of a welding device located in the transverse window of the table, a welding-cutting sponge located on the frame, made to rotate in a vertical plane , and loading device with pushing bar. The frame is equipped with a U-shaped lever with a swinging clip, 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.

Known devices 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. In addition, these devices do not meet the requirement of compact lines, which is associated with their layouts.

A known line for packaging products in shrink film according to patent RU 111106 U1, comprising a packaging module, a conveyor for feeding products into the packaging module, a pick-up roller conveyor, a conveyor for moving products from the packing module to a pick-up roller table and a heat chamber covering the conveyor, the packaging module includes a vertically located frame on which is mounted with the ability to move along the rails along the vertical racks of the thermal knife, a table is also fixed on the frame of the packaging module, clamp and upper and lower nodes for unwinding the film, and on the table there is a stop for the thermal knife and mounted with the possibility of reciprocating movement of the pusher and cutter, each of which is connected with its own drive, and between the stop for the thermal knife and the conveyor there is a shutter with the possibility of vertical reciprocating movement in guides associated with the drive.

This line is free from the drawbacks of the above devices, however, in this line the guides in which the shutter is installed are fixed on the frame of the packaging module, because of which it is impossible to provide minimal gaps between the conveyor and the shutter. As a result, it is possible to form product blocks with a spread in shape, which reduces the quality of the packaging.

The objective of the utility model is to improve the quality of packaging by reducing the gaps between the conveyor and the curtain.

This problem is solved in a line for packaging products in shrink film containing a packaging module, a conveyor for feeding products into the packaging module, a pick-up roller, a conveyor for moving products from the packing module to a pick-up roller, and a heat chamber covering the conveyor, while the packing module includes a vertically located frame, on which is mounted with the ability to move along the rails along the vertical racks of the thermal knife, a table is also fixed on the frame of the packaging module, and upper and lower nodes for unwinding the film, and on the table there is a stop for the thermal knife and mounted with the possibility of reciprocating movement of the pusher and cutter, each of which is connected with its own drive, and between the stop for the thermal knife and the conveyor there is a shutter with the possibility of vertical reciprocating movement in guides associated with the drive. According to a utility model, the guides in which the curtain is mounted are fixed on the conveyor frame.

The fastening of the guide rails to the conveyor frame reduces the gaps between the conveyor and the shutter, which prevents the product from getting between the conveyor and the thermal knife and allows the formation of product blocks of a more regular shape. As a result, the quality of packaging leaving the heat tunnel significantly increases, which, in turn, allows to increase the throughput and, accordingly, the productivity of the line as a whole.

The utility model is illustrated by drawings.

Figure 1 shows a line for packaging products in shrink film, side view;

figure 2 is the same, a top view;

figure 3 - packaging module with a conveyor, view from the side of the heat chamber;

figure 4 is a diagram of the filling of shrink film in the packaging module.

As shown in Fig.1-2, the line for packaging products in shrink film contains a packaging module 1, a chain conveyor 2 with a heat chamber 3 installed above it, a take-up roller 4 and a conveyor 5 (Fig.2) for supplying products to the packaging module 1. The conveyor 5 is perpendicular to the conveyor 2.

The packaging module 1 includes a vertically located frame 6, on which is mounted with the possibility of moving along the rails along the vertical racks of the frame 6 a thermal knife 7 (Figs. 3, 4), connected with a pneumatic cylinder 8 fixed to the frame 6. On the frame 6 of the packaging module 1 under thermal knife 7 mounted table 9 (figure 1, 2), on which there is an emphasis 10 (figure 4) for thermal knife 7, cut-off 11 (figure 1, 2) and pusher 12 (figure 3). The stop 10 has a spring-loaded upper part. The cutter 11 and the pusher 12 are mounted with the possibility of reciprocating movement in the direction perpendicular to the direction of the conveyor 5, and each of them is connected with its drive 13 and 14 (Fig.1, 2), respectively. The cutter 11 is designed to separate the group of product units from the total product flow coming through the conveyor 5, and the pusher 12 provides movement of the formed group of product units in the direction of the chain conveyor 2.

In front of the cutoff 11 (figure 2, 3) in the direction of production over the conveyor 5 installed dividers 15 (figure 2, 3) of the product flow. Figure 2 shows two dividers 15, providing when the conveyor feeds the products, the separation of these products into three streams, however, the number of dividers may be different, which is determined by the size of the unit of production. The total flow width of the products supplied by the conveyor is set by the restrictors 16 (Fig. 2, 3) installed on the frame 17 (Fig. 3) of the conveyor 5. In this case, one of the restrictors located on the side of the conveyor 5 facing the chain conveyor 2 is installed motionless, and another limiter located on the opposite side of the conveyor is installed with the possibility of adjusting its position.

A clamp 18 is connected to the frame 6 of the packaging module with the possibility of vertical movement and is connected to the pneumatic cylinder 19 of its movement, and guides 20 are mounted on the frame 17 of the conveyor 5 (Fig. 3), in which the shutter 21 is connected with the possibility of vertical movement and is connected with the pneumatic cylinder 22.

On the frame 6 of the packaging module (Fig. 1), drive rollers 23 are mounted from below and above, connected to electric motors 24 of their rotation. The rollers 23 are designed to rotate the rolls of shrink film 25 (FIG. 4) installed on them when it is unwound. To prevent the possibility of falling shrink film rolls 25 mounted on rollers 23, roll holders 26 with clamps 27 are installed on the packaging module 6.

On the upper part of the frame 6 of the packaging module (Figs. 1, 4), a film tensioner is installed, made in the form of a U-shaped frame 28 with counterweights 29 at its ends. The frame is pivotally connected to the frame 6, and its horizontal side is designed to interact with the shrink film 25 thrown through it in the working state of the installation (Fig. 4).

A control unit 30 is also mounted on the frame 6 of the packaging module 1, comprising electrical controls for the conveyor 5, the thermal knife 7, the cutter 11, the pusher 12, the clamp 16, the shutter 21 and the drive rollers 23 of the film unwinding.

On the upper part of the thermal knife 7, a guard 31 (Fig. 3) can be fixed, excluding the operator’s hands touching the thermal knife or product falling under the thermal knife in the working position of the thermal knife.

The heat chamber 3 (figure 1) contains heating elements 33 and at least one impeller 34 connected to the drive 35 of its rotation, to ensure the circulation of heated air in the working cavity of the heat chamber.

Behind the heat chamber 3 (Fig. 1), in front of the take-up roller table 4 above the conveyor 2, there is a fan 36 for cooling the packaging film heated in the heat chamber.

On the frame 37 of the chain conveyor 2, another control unit 38 is mounted (FIG. 1), containing controls for the heating elements 33 of the heat chamber 3, the impeller rotation drive 35 and the fan 36.

The packaging module 1, the chain conveyor 2, the take-up roller 4 and the conveyor 5 are mounted on racks having, at the bottom, height-adjustable legs 39.

To guide the shrink film during the operation of the line on the frame 6 of the packaging module 1, bypass rollers 40 and a tension roller 41 (Fig. 4) are mounted movably in the guides of the frame 6.

The packaging line operates as follows.

On the upper and lower roll holders 26, rolls of heat shrink film 25 are installed so that these rolls rest on the drive rollers 23. On the table 9 serves the upper and lower blades of heat-shrink film, escaping from the upper and lower rolls, which are unwound due to the rotation of the rollers 23, driven into rotation electric motors 24. The unwinding of the film is carried out in predetermined directions. Both canvases are located on the table 9 so that they overlap the emphasis 10 for the thermal knife. The thermal knife 7 is lowered by means of a pneumatic cylinder 8 downward, heat sealing the upper and lower paintings of the film with the formation of a seam. As a result, the line becomes filled with shrink film and ready for packaging products.

The conveyor 5 serves units of production, which, moving the conveyor 5 (figure 2), are divided by dividers 15 in this case into three flows of units of production.

When the separated product flows abut against the cutter 11, the conveyor filling limit switch (not shown) is activated, and the drive 13 of the cutter 11 moves the cutter away from the conveyor 5. In this case, the product group moves the conveyor 5 forward to the packaging module 1 and fills the space on the table 9 in front of the pusher 12. At the same time, the shutter 21 is in the raised position, holding the product group 42 from getting into the working area of the thermal knife 7. After that, the cutter 11 returns to its original position, separating the located I am on the table 9 group of 42 products from the main flow of products. The shutter 21 of the pneumatic cylinder 22 is lowered to the lower position. The pusher 12, under the action of the actuator 14, moves the product group to a part 32 of the table 9, located between the stop 10 for the thermal knife 7 and the chain conveyor 2. In this case, the product group 42 is wrapped with a film and held on this part 32 of the table 9 by the clamp 18, which falls under the action of the pneumatic cylinder 19 (figure 4). After that, the thermal knife 7 is lowered by the pneumatic cylinder 8, and when it interacts with the stop 10, the lower film web is welded to the upper fabric by a weld. In this case, the product group 42 is converted into a product block wrapped in a packaging film (FIG. 4). When welding the film webs, the product block is compressed by the film, its tension around the product, welding of the film webs and the film segment of the product block from the common film web. Before welding the film, when the product is pressed against the table by the clamp 18, the pusher 12 and the shutter 21 with the drive 14 and the pneumatic cylinder 22, respectively, return to their original position. After welding the film, the thermal knife 7, as well as the clamp 18, 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 (figure 4) from the rolls 25 under the action of automatically switched on electric motors 24 (figure 3) are unwound in predetermined directions due to the rotation of the rollers 23.

Then, the described operation cycle of the wrapping unit is repeated in automatic mode, with each subsequent product block pushing each previous product block along the conveyor 2 into the cavity of the heat chamber 3.

In the heat chamber 3, the film is heated to a predetermined temperature for a predetermined period of time. After exiting the heat chamber, the film of the product block cools and, thanks to its properties, a heat shrink process occurs. The cooling of the film is facilitated by the fan 36. Due to heat shrinkage, the film compresses the surface of the product block from all sides. Then the packaged product block is pushed by the conveyor 2 onto the rollers of the receiving roller table 4 (FIG. 2). From the receiving roller table 4, the packaged product block is transported to the storage location. Packed in film, the product block moves in a straight line in one direction and in the same plane, which makes it easy to push the product block in subsequent blocks.

The fastening of the guide rails to the conveyor frame made it possible to reduce the gaps between the conveyor and the shutter, which prevents products from entering between the conveyor and the thermal knife and allows the formation of product blocks of a more regular shape, which ultimately significantly improves the quality of the package leaving the heat chamber and the throughput of the line as a whole.

Claims (1)

A line for packaging products in shrink film containing a packaging module, a conveyor for feeding products into a packaging module, a pick-up roller, a conveyor for moving products from the packaging module to a pick-up roller, and a heat chamber covering the conveyor, wherein the packing module includes a vertically arranged frame, on which a thermal knife is mounted with the possibility of moving along vertical racks, a table, a clamp and upper and lower nodes for unwinding the film are also fixed on the frame of the packaging module, what is the stop for the thermal knife on the table and the pusher and cutter are installed with the possibility of reciprocating movement, each of which is connected with its own drive, and a shutter is installed between the thermal knife stop and the conveyor with the possibility of vertical reciprocating movement in the guides connected with the drive, characterized in that the guides in which the curtain is installed are fixed on the conveyor frame.