RU2521708C2 - Method of manufacturing package, device for its implementation and package - Google Patents

Abstract

FIELD: packaging industry.

SUBSTANCE: group of inventions relates to packaging production from thermoplastic materials. The device comprises a film supply unit, mechanism of its pulling, the unit of formation of the package, the mechanism of high-frequency welding, and the cutting tool. At that the device additionally comprises fold-generator providing the ability of feeding from two bobbins of thermoplastic material and the material with dielectric properties with the thickness of about 20 mcm, superimposed on each other, the bend in the longitudinal direction with the placement outside the thermoplastic material, followed by winding the fold on the receiving drum and its feeding to the unit of package formation with the welding, with at least one ridge. The device also comprises a cooling system, and means for placing the packaging in a stack. The method comprises unwinding the thermoplastic material, its cutting with the cutting tool, forming the package and high frequency welding. At that fold-generating is performed, as described above, and after welding the package is cooled and placed in a stack. The package comprises at least one ridge and is obtained with the above method using the above device.

EFFECT: group of inventions provides increased productivity and quality of the package.

6 cl, 5 dwg

Description

The group of inventions relates to the manufacture of packaging from thermoplastic materials and can be widely used in agriculture, food, construction, chemical and other industries.

A device for manufacturing packages of thermoplastic materials is known, comprising a film feed unit from a roll, a package forming unit, a film pulling mechanism, and a mechanism for welding the transverse seams of the package (see RF Patent No. 2163219, BV 51/30, 02/20/2001).

A disadvantage of the known device is its low performance due to the use of outdated equipment.

In addition, from the patent of the Russian Federation No. 2163219, B65B 51/30, 02/20/2001, a method is known for the manufacture of packages from thermoplastic materials, in which the film is fed from a roll and a sleeve is formed. In the welding position, compress the sleeve in the transverse direction and form the upper seam on the packaging and the lower seam on the end portion of the sleeve by transferring heat under pressure. Using a cutting device, the finished packaging is separated after the lower and upper seams are formed.

The disadvantages of this method is its low productivity, due to the receipt of a large number of defective packaging.

Also from the RF patent No. 2163219, B65B 51/30, 02/20/2001, packaging is known in the form of a bag made in the form of a sleeve with welded edges.

The disadvantages of the known packaging is its low quality, due to deformation during thermal welding.

The objective of this group of inventions is to eliminate the above disadvantages.

The overall technical result of this group of inventions is to increase productivity, create a reliable automated device in operation, high quality packaging, due to the absence of deformation in the manufacturing process and the exclusion of edge displacement.

The technical result is ensured by the fact that the device for manufacturing a package of thermoplastic material contains a film supply unit, a film pulling mechanism, a package forming unit, a high frequency current welding mechanism and a cutting tool. At the same time, it additionally contains a folding agent, which makes it possible to feed thermoplastic material and a material with dielectric properties of about 20 μm thick from two bobbins, lay them on top of each other, bend in the longitudinal direction with the thermoplastic material placed on the outside, wind them onto the take-up reel and feed them into a package forming unit with provision by welding to obtain at least one fold on the package. In addition, the device provides a cooling system and means for stacking the finished packaging.

The technical result is also ensured by the fact that the method of manufacturing a package of thermoplastic material includes unwinding a spool of thermoplastic material, cutting it with a cutting tool, forming the package and welding with high frequency currents. In this case, folding is performed, which ensures the supply of thermoplastic material from two bobbins and a material with dielectric properties of a thickness of about 20 μm, the application of bobbin materials on top of each other, their bending in the longitudinal direction with the thermoplastic material being placed outside, winding and feeding from the bobbin into a package forming unit with provision by welding to obtain at least one fold on the package. In addition, after welding, the resulting packaging is cooled, followed by stacking.

I use polyvinyl chloride as a thermoplastic material.

In addition, the technical result is ensured by the fact that the package of thermoplastic material includes at least one fold and is made using the present method using the device.

The bottom of the package may contain a crease. A package may contain two side folds.

The technical essence of the present invention is illustrated by the following illustrations:

Figure 1 - shows an automatic packaging production line, where

Figure 2 - node unwinding from the reel;

Figure 3 - folds;

Figure 4 is a front view of a bulk PVC film product;

Figure 5 is a bottom view of a bulk PVC film product

Automatic line 1 provides the ability to unwind from bobbins 2, 3 of thermoplastic material forming the front and back of the package, as well as material from bobbin 4, including thermoplastic material and material with dielectric properties. The materials are pulled onto the endless conveyor 5 and fed under the equipment for welding. Further along the automatic line 1, a fan may be provided to provide cooling for the molded package. The line ends with a means for stacking the finished packaging.

The reels 2, 3 contain cut elements (front and rear) packaging. Cutting is done in the reel unwinding unit, which includes a bed 6, a reel with PVC film 7, tension rollers 8, a guide roller 9, a cutting tool 10 that only cuts the film web in the longitudinal direction, and the receiving drum 11.

Creasing on the packaging is ensured by means of a folding tool, which includes a bed 12, a bobbin with a material having dielectric properties 13 (polyethylene, paper, etc.), a bobbin with PVC 14, guide rollers 17, a folding plate 18, which provides folding of materials in longitudinal direction, pressure rollers 17, guide roller 20, flange 21 (polyethylene + PVC) and receiving drum 21.

The present invention is as follows.

Carry out the opening of the front and rear parts of the package in the site of unwinding from a reel containing a unit for supplying a film. In this case, a PVC film for cutting one part of the package (front or back) is fed from the reel 7 using the mechanisms of drawing the film in the form of tension rollers 8 and a guide roller 9, they are cut in the longitudinal direction with a cutting tool 10 and wound on a receiving drum 11.

To obtain the lower folds and side folds on the packaging, folding is carried out. At the same time, a PVC film and a material having dielectric properties (for example, polyethylene, paper, etc.) are supplied from two reels 13, 14. When unwinding, a PVC film is applied to a material with dielectric properties, with the help of a folding plate 16 they are bent in the longitudinal direction so that the PVC film is placed outside. Forming the bend is provided by pressure rollers 17. Next, the resulting fold 19 is wound with a guide roller 18 onto the receiving drum 20.

Then the parts of the package, the seam 19 are fed into the package forming unit, where the individual elements are combined with each other, and then fed to the welding unit for welding. In this case, welding is carried out in a high-frequency field by means of a high-frequency generator and welding equipment. The power of the welding device can be about 1.5 kW at a frequency of 27-65 MHz and using a brass welding electrode.

The cut elements that form the front and back of the package are fed with a conveyor 5 to the package forming unit from bobbins 2 and 3, and the fold is made from bobbin 4. The packing elements are placed on the conveyor 5 by combining the film webs and the fold location. Then carry out welding in the longitudinal and transverse directions. The presence in the fold of a material with dielectric properties of a thickness of about 20 μm ensures the formation of side and lower folds and excludes welding of the edges of the PVC film. When welding, individual elements are separated from the stretched web and packaging is formed.

Next, the molded package is cooled by a fan and material with dielectric properties is separated from it. The stacker at the end of the conveyor removes the finished packaging from it and puts it in the stack.

The finished package (see Figs. 4 and 5) contains a valve 21, a small element 22, a fastener 23, side seams 24, 26, a bottom fold 25, an upper edge of the bottom fold 27 and a lower edge of the bottom fold 28.

Claims (6)

1. A device for manufacturing a package of thermoplastic material, comprising a film supply unit, a film pulling mechanism, a package forming unit, a high frequency current welding mechanism and a cutting tool, characterized in that it further comprises a fold former that enables the thermoplastic material to be fed from two spools and material with dielectric properties of a thickness of about 20 μm, their overlapping, bending in the longitudinal direction with the outside of the thermoplastic material, weaving to the receiving drum and supplying it to the package forming unit, ensuring by welding to obtain at least one fold on the package, in addition, the device provides a cooling system and means for stacking the finished package. 2. A method of manufacturing a package of thermoplastic material, comprising unwinding a spool of thermoplastic material, cutting it with a cutting tool, forming a package and welding with high-frequency currents, characterized in that it is folded to provide thermoplastic material and material with dielectric properties of about two thicknesses from two spools 20 microns, superposition of materials from bobbins on each other, their bending in the longitudinal direction with the thermoplastic material being placed outside, winding on conductive drum and feeding it to the node of the package formation secured by welding for obtaining a package of at least one pleat, in addition, after welding is carried out cooling the package with subsequent stacking. 3. The method according to claim 2, characterized in that I use polyvinyl chloride as a thermoplastic material. 4. A package of thermoplastic material, comprising at least one fold and made using the method according to claims 2 or 3 using the device according to claim 1. 5. The packaging according to claim 4, characterized in that its bottom contains a fold. 6. The packaging according to claim 5, characterized in that it contains two side folds.

Images