SU1519957A1 - Device for packing articles in heat-sprinkable film - Google Patents

Abstract

The invention relates to devices for packaging products in a shrink film, can be used in many areas of the national economy, for example in the leather industry when packaging rolls of leather and is aimed at reducing energy consumption and improving the quality of packaging. The device consists of a conveyor 2, a mechanism 3 for feeding articles 1 into the heat-shrinking chamber 4, which has a bracket installed vertically for movement with hingedly fixed carrier 11 on it, interconnected by a rigid link and having a locking vertical position, and also wrapping mechanism 5 and heat-shrinking chamber 4. Due to the design of the mechanism for supplying products to the heat-shrinking chamber, heat loss during the supply of products is reduced, the uniformity of heat-shrinking is increased due to the small area of contact of the article with bearing supports, provided the article at a fixed position and thermocontracting avoided contacting each other products that reduces energy consumption and improves the quality of packing of. 6 Il.

Description

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The invention relates to devices for packing articles in a heat shrinkable film and can be used in many sectors of the national economy, for example, in leather processing, for packing rolls of leather.

The purpose of the invention is to reduce energy consumption and improve the quality of packaging.

Fig, 1 shows the device, overall view; in Fig.2 a section aa in Fig.1; on fig.Z - section bb in figure 2; Fig. 4 shows the mechanism for supplying products to the heat-shrinking chamber at the moment when the product starts to be supplied thereto; as shown in Fig. 5, the same at the time of the end of the supply of products to the heat-shrinking chamber; 6 - the same, at the moment of release of the vertical position lock after the product from the heat-shrinking chamber.

A device for packaging articles 2 in a shrink film consisting of (Fig. 1) conveyor 2, for example, a string 3, mechanism 3; supplying articles I into a terriary shrink chamber 4, a wrapping mechanism 5 and shrink chamber 4 with sources of infrared radiation 6, reflectors 7 of a parabolic shape and heat-proof shutters 8, connected with the mechanism 3 for supplying products 1 to the heat-shrinking chamber 4 and having reflecting surfaces on the inside, as well as a cooling umbrella 9. Mechanism 3 for supplying products 1 to the heat shrink The internal chamber 4 (Fig. 2) contains an IO bracket mounted under it with the possibility of vertical movement with carrier supports 11 hingedly fixed on it, interconnected by a rigid link 12 and having a detent 13 of a vertical position. In this case, a support 14 (Fig. 4) is fixed on the frame of the conveyor 2 for unlocking the latch 13 of the vertical position of the supporting supports II, made, for example, in the form of a triangle hinged in its rectangular top, as well as sensors 15 for positioning the packaged product supports 1 I,

made, for example, in the form of microswitches. The bearing supports I1 are installed with the same displacement of the centers of gravity relative to the axes of the hinges (FIG. 3) and are made of bars 10

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anti-adhesive coating. The non-value of the displacement of the centers of gravity of the bearing supports 11 is determined experimentally depending on the mass and shape of the packaged product.

Dp maintain a given temperature in the heat shrink chamber 4 on it is installed a thermostat 16 with a sensor 17.

The mechanism 3 dp supplying products I to the heat-shrinking chamber 4 can be performed, for example, in the form of a pneumatic cylinder 18, while the bracket 10 with bearing supports 11 is mounted on the power rod 19 of the pneumatic hydraulic cylinder 18 (Fig. 2). The pneumatic cylinder 18 has a working cavity 20 with a piston for moving the bracket 10 and working cavities 21 and 22 with a piston for moving the heat shields 8 (figure 4). In this case, the cavity

20cw C with cavities 21 and 22 through adjustable throttles, and the volume of the cavity 20 is equal to the sum of the volumes of the cavities

21 and 22.

The holding time of the products 1 in the heat shrink chamber 4 is controlled by a time relay (not shown).

The device works as follows.

Product I is fed to the wrapping mechanism 5, where it is covered with a shrink film, followed by sealing the closing portions of the film and separating the resulting packaging. Next, the packaged products 1 continuously moving the string conveyor 2 gets onto the bearing supports I1 of the mechanism 3 for supplying the product to the heat-shrinking chamber 4. When the product 1 is correctly positioned, the sensors 15 are activated on the supports 11, which turn on the pneumatic cylinder 18. At this, compressed air is supplied to the pistons of the cavities 21 and 22 (Fig. 4) and by pumping the working fluid from the cavities 21 and 22 through the throttles into the cavity 20, the piston of the cavity 20 moves together with the power rod 19 upward, and the products I lying on the supports 11 are fed to the heat-shrink Chamber 4; Simultaneously with this blog, the connection of heat-shielding shutters 8 with pistons of cavities 21 and 22, 55 occurs (Fig. 5). In the heat-shrinking chamber 4, a uniform thermal treatment of the surface of the heat-packed 30 occurs

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Product film 1. After the product 1 is set using a time relay, the pneumatic hydraulic cylinder 18 is turned back on in the heat-shrinking chamber 4. At the same time, the air is compressed into the cavity 20, and due to pumping the working fluid through the throttles in the cavities 21 and 22 the piston of the cavity 20 with the power rod 19 downwards and the withdrawal of the product 1 from the heat-shrinking chamber 4. Simultaneously, the heat shields 8 are closed. When the power rod 19 moves with the bracket 10 downwards, the latch 13 of the vertical position touches the stop 14 and it opens (fip.6). Due to the displacement of the center of gravity of the bearing of the supports 11, they rotate around the axes of the hinges and the product 1 is transferred to the string conveyor 2. At the same time, the product 1 is cooled by the air flow from the cooling umbrella 9.

Thus, the installation of a vertically movable bracket under a shrinkable chamber with hinged supporting supports connected to each other, I have: 1x a vertical position lock and equally displaced relative to the axes of the hinges, reduces heat loss from the shrinkage chamber when the product is fed into it, increases uniformity

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shrinking the film due to the small area of contact between the base of the product and the bearing supports, providing. no fixed position

with thermo-shrinking and eliminates the contact of successive products, which reduces energy consumption and increases the quality of packaging.

Claims (1)

Invention Formula A device for packaging products in a shrink film comprising a conveyor, a mechanism for feeding products into the heat shrink chamber, a wrapping mechanism and a heat shrink chamber with infrared radiation sources, parabolic reflectors and heat-sealing curtains associated with the mechanism for feeding the product into the heat shrink chamber characterized by , that, in order to reduce energy consumption and improve packaging quality, the mechanism for feeding products into the heat-shrinking chamber contains an arm mounted under it with the possibility of vertical movement with a hinge-mounted support bearing on it, interconnected and having a lock of the vertical position, and installed with one displacement of the centers of the body relative to the axes of the hinges. Yu nineteen eight P FT fie. 2  R Phie. Phage. t Ji ftJLk LLL X X -If .D FIG. five Cffffffrn / u to ffyje