RU117136U1 - PACKING LINE THERMOTONNEL TRANSPORTER - Google Patents

Abstract

The conveyor of the thermal tunnel of the packaging line, characterized in that it contains a frame with driven and driving sprockets, which are covered by closed chains, while each chain has a lower and upper branches, the chains are interconnected around the perimeter by a plurality of carrier plates of the conveyor, the frame is made of longitudinally located channels , interconnected by crossbars, between the lower and upper branches of the chains there is a thermal insulator installed on the conveyor frame, while the thermal insulator is located under the carrying plates of the conveyor along the width of the conveyor frame and the length of the heat tunnel connected to the channels of the conveyor frame.

Description

This technical solution relates to packaging products in shrink film, in particular to conveyors, which are components of heat tunnels, in which the packaging film is heated, and when cooled at the outlet of the heat tunnel, the film shrinks.

Known heat-shrink chamber containing a movable front and blank rear walls, as well as a movable in the horizontal plane, a pallet mounted with the possibility of reciprocating movement (RU 5171 U1, 16.10.1997).

A known installation for packaging products in shrink film containing a housing, inside of which there are heating elements, a fan, a protective partition, a welding device, characterized in that the casing is additionally equipped with a lattice tray, a rotary damper and two reflectors, the first of which is located in a horizontal the plane under the grate tray in the suction area of the fan installed in the lower part of the housing, and the second is located in a vertical plane passing under the first reflect a box between the fan and the protective partition with the possibility of directional blowing of the heating elements installed along the housing wall and separated from the working area by a rotary damper installed in the upper part of the housing and a protective partition made vertically and reaching the plane of the first reflector, while the housing additionally equipped with a box-shaped lid, along the perimeter of the lower part of which at least two adjacent sides are placed linear heaters welding a device (RU 95118220 A, 10.10.1997).

A known installation for packaging piece or a group of products in a shrink film containing a frame on which a heat-shrink chamber of a passage type with a conveyor in the lower part is located behind the heat cutter (RU 2170195 C2, 07/10/2001).

There is also a method of packaging an article by wrapping it with an anti-corrosion film or paper using heating the film in an oven and reducing heat, as well as a device for implementing the method comprising an oven, conveyor and packaging device (JP 3846999 B2, 11/15/2006).

Known furnace for thermal shrinkage of the packaging film, comprising a housing with double compartments and a double vault, a fan for circulating air with an impeller in the vault and heaters in the side compartments, the inner frame contains a double under, divided by transverse partitions into channels connected alternately with the right and left side compartments (RU 2127697 C1, B65B 53/06, 03/20/1999).

Known shrink tunnel for shrink shrink film on the packaging, in the tunnel there is at least one heater having a burner for receiving hot gas, while the tunnel contains a housing and a conveyor located therein (RU 2009140093 A, B65B 53/06, 10.05. 2011).

Known conveyor furnace containing a forced convection chamber, including a fan, heating elements, ducts with perforated diffusers of heated air to packages in shrink film, a conveyor is located in the chamber, the shrink tunnel body has inlet and outlet openings closed with elastic curtains (RU 97100025 A, B65B 53 / 06, 11/10/1998).

A known furnace for packaging products in shrink film by using heated air currents, containing a conveyor, the outer and inner frames of the furnace, the inner frame is made with side shutoffs, a circulation fan with an impeller in the arch and a heater, at least in one of the transverse of channels in the inlet part of the furnace, a nozzle is installed, connected to the air channel with a side compartment, and the remaining compartments have guiding reflectors of air flows (RU 2240966 C2, 11/27/2004 and RU 2003100213/12, 03.20.1999, B65B 53/06).

Known furnace for thermal shrinkage of the packaging film, containing the conveyor, the outer and inner frames with side compartments, a double vault and a hearth, a circulation fan with an impeller in the arch and heaters in the side compartments, and in order to improve the heating and shrinkage of the film specified under the inner frame is divided transverse partitions on the channels, connected alternately with the right and left side compartments (RU 97106305 A, B65B 53/06, 04/27/1999).

Thermotunnel conveyors are known, each of which contains a frame with driven and driving sprockets, which are covered by closed chains, with each chain having lower and upper branches, the chains are interconnected along the perimeter by a plurality of conveyor carrier plates (RU 111 101 U1, 12/10/2011; RU 111110 U1, 12/10/2011).

Known conveyors do not provide effective heat retention in the shrink tunnel chamber and uniform distribution of heat in the chamber, which negatively affects the quality of packaging products in shrink film. This is due to the fact that with non-uniform heating of the film, stress concentrations in the film increase during its cooling and shrinkage at the exit of the heat tunnel. In the film, after shrinkage due to uneven heating, micro-fractures appear, which reduces the quality of the package. Heat losses in the heat tunnel lead to a relatively large energy intensity of the process of packaging products in shrink film and to reduce the uniformity of heating of air in the heat tunnel chamber.

The technical result of the conveyor is to reduce heat loss in the heat tunnel and to improve the quality of packaging products in shrink film.

The technical result was obtained by the conveyor of the thermal tunnel of the packaging line, characterized in that it contains a frame with driven and driving sprockets, which are covered by closed chains, each chain has lower and upper branches, the chains are interconnected around the perimeter by a plurality of carrier plates of the conveyor, the frame is made of longitudinally arranged channels, interconnected by cross members, between the lower and upper branches of the chains there is a heat insulator mounted on the cross members of the frame and resting on a sheet, Boiled between the cross members to their lower flanges and the inner surfaces of the U-sections, thermal isolator located on the conveyor frame heat tunnel width and length, mounted to the upper shelves channels, and the longitudinal sides of the thermal isolator arranged to be in contact with the inner surfaces of channels, wherein the thermal isolator is located under the carrier conveyor plates.

Figure 1 shows the conveyor shrink tunnel packaging line.

Figure 2 is a section aa in figure 1.

Figure 3 is a section bB in figure 1.

Figure 4 - conveyor in a spatial image (thermal insulator is not shown).

Figure 5 - layout of the conveyor in the thermal tunnel.

The conveyor of the thermal tunnel of the packaging line contains a frame 1 (Fig. 1) with driven and driving sprockets 2 and 3, respectively, which are covered by closed circuits 4 and 5, with each chain having a lower branch 6 and an upper branch 7 (Fig. 2).

The chains are interconnected around the perimeter by a plurality of load bearing plates 8 (Fig. 4) of the conveyor. The frame is made of longitudinally arranged channels 9, interconnected by crossbars 10. Between the lower and upper branches 6 and 7 of the chains there is a heat insulator 11 (Fig. 3), mounted on the cross members 10 of the frame by means of a sheet. Thermal insulator 11 is located along the width of the frame and the length of the thermal tunnel mounted to the upper shelves of the channels 9 (figure 2). The longitudinal sides 12 and 13 of the thermal insulator 11 (Fig. 5) are arranged to contact the inner surfaces 14 of the channels 9 (Fig. 3). Thermal insulator 11 is located under the carrier plates 8 of the conveyor. Each cross-section 10 in the cross section has the shape of a channel (FIG. 2), between the shelves 15 of which a layer of thermal insulator 11 is located. On the carrier plates 8 of the conveyor (FIG. 5), the packaging of products 16 is conventionally shown.

The channels have holes 17 (Fig. 4) for fastening on the conveyor of the casing of the thermal tunnel 18 as shown in Fig. 2. Since the side and upper walls of the thermal tunnel are insulated with thermal insulators 19 and 20, a through thermally insulated chamber 21 is formed between the conveyor and the thermal tunnel between them, closed from the ends by shutters (not shown), and the camera 21 is closed from below by a thermal insulator 11 (Fig. 3) mounted on sheet 22, welded between the cross members 10 to their lower shelves and the inner surfaces 14 of the channels 9 (figure 3).

The conveyor works in conjunction with the work of thermotunnel. For this, products 16 are installed on the carrier plates 8 of the conveyor (Fig. 5) and conveyed by the conveyor to the chamber 21 of the tunnel with heated hot air in it. From the ends, the thermal tunnel is closed by shutters (not shown) that bend and pass the products into the chamber. Since the chamber of the thermal tunnel is insulated from all four sides along the perimeter, including the lower side, which is insulated by the thermal insulator 11 of the conveyor, heat losses during the operation of the thermal tunnel are significantly reduced, and the uniformity of heat distribution in the chamber 21 of the thermal tunnel is increased. This technical result positively affects the quality of the packaging of products 16 in shrink film 23 (Fig. 5), which wraps the product 16. When the film is uniformly heated, stress concentrations in the film decrease during cooling and shrinkage at the exit of the heat tunnel. At the same time, the film after its shrinkage tightly covers the product from all its sides, and the microfractures of the film are minimized, which increases the quality of the package.

The conveyor operates in a highly heated chamber 21 (Fig. 5), in which the air is heated by the heaters 24 and enters the chamber through openings 25 made in the wall 26 of the duct 27. In this regard, the lower thermal insulator 11 is essential, which is chosen to ensure uniform temperature of hot air in the chamber 21 of the thermal tunnel.

These operating conditions of the heat tunnel are ensured by the design of the conveyor, which significantly reduces heat loss in the heat tunnel and ensures that the temperature of the air heated in the heat tunnel is uniform, which has a positive effect on improving the quality of packaging products in shrink film.

Claims (1)

The conveyor of the thermal tunnel of the packaging line, characterized in that it contains a frame with driven and driving sprockets that are covered by closed chains, each chain having lower and upper branches, the chains are interconnected around the perimeter by a plurality of carrier plates of the conveyor, the frame is made of longitudinally arranged channels interconnected by cross members, between the lower and upper branches of the chains there is a thermal insulator mounted on the conveyor frame, while the thermal insulator is located under the supporting plate by the conveyor along the width of the conveyor frame and the length of the thermal tunnel connected to the channels of the conveyor frame.