SU1443792A3 - Apparatus for packing products into thermoplastic bag in vacuum - Google Patents

Abstract

The invention relates to a device for packing products under vacuum in a package of thermoplastic material and is intended to increase productivity. The device comprises a chamber associated with the vacuum system and the atmosphere. A fan 7 is placed in the chamber to create air circulation, an air heater 8 and welding elements 9 and 10. The air heater 8 is separated from the rest. the parts of the chamber with a partition 12 and pas-i are placed between the fan 7 and the nozzle 5, which connects the chamber with the atmosphere. Such an embodiment of the device allows for the circulation of hot air only in one direction and optimally blows the bag 15 while simultaneously evacuating the air and brewing the bag. Because of this, the vacuum packaging process is significantly more efficient and faster, 3 Il. 2 / w O9 O N9 CN

Description

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The invention relates to vacuum packing devices for various products and can be used in many industrial sectors.

The purpose of the invention is to increase productivity.

FIG. 1 shows the proposed device, a longitudinal section (the beginning of the packaging process); in fig. 2 the same, the bag is placed in the chamber; in fig. 3 - the same package brewed.

The device contains a chamber formed by two half-shells 1 and 2, the chamber is connected via a pipe 3 to the valve 4 with a vacuum system (vacuum wasp) and through a pipe 5 to the valve 6 to the atmosphere. The chamber contains a fan 7, an air heater 8 and welding elements 9 and 10. The air heater is separated from the rest of the chamber (internal cavity 11) by a partition 12 and is placed between the fan 7 and the nozzle 5 connecting the chamber to the atmosphere. Air heater 8 is continuously under voltage. It has a large thermal mass and is finned with finned to improve heat transfer. The fan 7 is equipped with a drive motor 13. The seal between the semi-shells 1 and 2 of the cameos is provided with a gasket 14. When rotating in the chamber of the package 15 with the product 16, its opening side is between the welding elements and 9 and 10, which are conventional welding tires. Tires are laid parallel to one. Above the other with a gap through which air can be pumped out. The package 15 is placed on the rod 17, due to which air can pass under the bottom surface of the package 15.

In the partition 12, an opening 18 is made, and between the partubs 3 and 5, a swing valve 19 is installed. The chamber 20, in which the heater 8 and the damper 19 are located, is a heating chamber. The upper heating element 9 has a drive 21. The partition 11 and the half-shell 2 chambers form a channel 22.

The device works as follows.

Before placing the bag 15. with the product 16 in the chamber, the valves are :( and 5 are closed, the fan 7 is fixed.

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After the bag 13 with the product 16 is placed manually or automatically into the chamber, it is closed, connecting the half-shells 1 and 2. As soon as the inner cavity 11 of the chamber is sealed, the fan 1 is turned on, driven by the motor 13 and supplying air from the heating chamber 20 into the internal cavity 11 of the chamber. The air passes around the package 15, after which the channel 22 gets back into the chamber 20 and so on. The flap 19 swinging under the heat rises and lets air through. Hole 18 facilitates the passage of air and its circulation. Simultaneously with the circulation through the inner cavity 11 of the chamber, the air is heated by the heater 8.

Simultaneously with the sealing of the cavity 11 of the chamber or after some delay, the valve 4 is opened and the air is gradually evacuated from this cavity by means of a vacuum pump. When the pressure in the inner cavity 11 of the chamber decreases, the air inside the package 15 also escapes. Due to the discharge in the inner cavity 11 of the chamber, the heat transfer to the bag 15 is gradually reduced. Despite this, welding of the bag 15 can be started, after which atmospheric pressure is restored in the inner cavity 11 of the chamber and the heating chamber 20.

As soon as the open edge of the bag 15 is clamped by the welding elements 9 and 10, the air suction valve 4 closes and the valve 6 of the nozzle 5 simultaneously connects the chamber with the atmosphere. At the same time, due to the low air pressure, the flap valve 19 is closed and the air entering the internal cavity 11 of the chamber first passes through the air heater 8. The fan 7 provides continuous air circulation, therefore, further heat treatment of the bag 15 can be started. After completion of the welding operation of the bag 15 or at the next stage, the fan 7 is stopped, the valve 6 is closed, the upper half-shell of the chamber 1 is lifted and the upper welding element 9 is retracted to the non-operating position. The packaging is ready and can be removed from the chamber.

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The package can be removed from the inner cavity 11 of the chamber automatically, if the rods are driven by a screw instead of them, an appropriate transport system is installed.

Such an embodiment of the intended device allows creating a trajectory of hot air in the form of a closed loop so as to ensure its circulation in one direction only, which allows for optimal blowing of the bag at the same time as air is pumped out and the bag is welded. Due to this, the vacuum packaging process is much more efficient and faster.

the invention

Apparatus for packaging products under vacuum in a package of thermoplastic material comprising a chamber associated with the vacuum system and the atmosphere through valves with valves placed in the chamber

a fan for creating air circulation and an air heater, characterized in that, in order to increase productivity, it comprises

welding elements, while the heater is separated from the rest of the chamber by a partition and placed between the fan and the pipe connecting the chamber with the atmosphere.

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Claims (1)

Claim A device for packaging about ₅ products under vacuum in a package of thermoplastic material, containing a chamber connected to the vacuum system and the atmosphere by means of nozzles with valves, a fan for creating air circulation and an air heater located in the chamber Yu, characterized in that, in order to increase performance, it contains placed in the camera 15 welding elements, while the air heater is separated from the rest of the chamber by a partition and placed between the fan and the pipe connecting the chamber with the atmosphere.