FI93434C - Packaging method for forming a package and packaging a product - Google Patents

Description

93434

Packaging method for forming a package and packaging a product. - Förrarande för framställning av en förpack-Ning ooh förpackning av produkten.

The present invention relates to a method in which a tubular package consisting of an inner and outer membrane used for packaging is made in a packaging machine and the product to be packaged is sealed in the space between the membranes of the tube by means of blown air or other gas.

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A packaging method is known from U.S. Pat. Pat.No. 4,918,904 wherein the package is formed by a double bag with an opening on one side. When packing, the product has to be pushed into the bag through the opening. The packaged product adheres to the pouch 15 between the membranes by means of blown air or other gas. This bag is poorly suited for automated packaging because the bag has to be opened from the open side separately and as a different work step. Different sized bags are needed for different sized products. The bags must be pre-planned by 20 Telia and pre-manufactured for different products. This method is thus mainly suitable for manual packaging and has a limited range of applications.

Methods are also known in which molds are used to produce protective materials from different foams, e.g. styrox or urethane, for various products. This is an expensive and waste-intensive method. For each product, a separate mold must be designed and built separately, which is a time-consuming and uneconomical solution.

30 Packing the product in these protective materials requires a lot of manual work and requires different packaging stock as well as intermediate storage for the packaging materials themselves.

The object of the present invention is to provide a new type of packaging method which does not have the above-mentioned drawbacks.

2 93434 To achieve this, the method according to the invention is characterized by what is stated in the characterizing part of claim 1.

The main advantages of the invention are that the method is excellently suited for automated packaging and that the method both forms the package and packs the product and that the inner and outer film can be different in composition, for example inner film antistatic and outer film non-antistatic or inner film sharp products resistant and outer film light impermeable and that by changing the mold, packages of different sizes can be quickly obtained from the same film material, adapting to product production, and that environmentally friendly film-15 materials can be used as the material. Because the tube is open at both ends, it is easy to place the product in the tube using automation and because the inner film forms around the product to be packaged regardless of its shape, the product is well protected against external impacts and the product to be packaged remains stationary in the package. This method is thus ideally suited for the automated packaging of products of different sizes and requiring different protective materials as part of production, regardless of the degree of automation in the production of the products to be packaged.

This method considerably reduces the problem of waste and recycling of used packaging compared to, for example, foam protective materials such as styrox or urethane, since the emptied tube 30 takes up only a fraction of the space compared to said foam solutions or other fixed solutions.

This method also removes molds and solid materials used in the packaging that are carefully designed for the product to be packaged 35. The need for storage space is reduced 93434 3 because packaging is created in the packaging process and no empty packaging is needed.

Due to the above, this method is more flexible, environmentally friendly, faster and more economical than the already known solutions.

In the following, the method according to the invention for forming a package and packaging a product will be described in detail by means of an exemplary embodiment with reference to the accompanying drawings, in which Figures 1 to 6 show different steps of the method according to the invention, and Figure 7 shows a finished package with products.

Figure 1 shows a method according to the invention in which 1 and 2 are film rolls or similar means for feeding film material 20. The films in rolls 1 and 2 may be of the same or different material. A valve 3 is attached to the film 6 from the roll 1 in the device 4. The attachment point of the valve 3 is set according to the size of the mold 10. Device 5 heat seal films 6 and 7 sides together. A double film 8 is formed.

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The end of the double film 8 is attached to the fastening device 9.

The mold 10 is a two-part, completely or partially bottomless arch and both halves of the mold 10 can slide separately along rails 11 and 12. The position of the rail 12 can be adjusted in the longitudinal direction of the device. The filling device 23 is attached to the rails 11 and 12.

The size of the finished package is determined by the size of the replaceable 35 molds 10.

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The device 13 is able to move up and down on the guides 14. The device 13 has a mating piece 15, for the heat sealer 16, and a groove 17, for the cutter 18, and a guide 19 which pushes the double film 8 into the fastening device 9.

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The devices 16, 18 and 9 are attached to a fixed base 20. The base has guide rails 21. The carriage 22 moves on guides 21.

The mounting rails 11 and 12 of the mold 10 are attached to the carriage 22, and since the mold 10 and the filling device 23 are further attached to the rails 11 and 12, the mold 10 and the filling device 23 move with the carriage 22.

15 The manufacture of a package according to the method begins with the entire equipment in the position shown in Figures 1 and 2.

The carriage 22 moves to the left of the initial position of Fig. 2 and carries the mold 10, whereby the double film 8 attached to the device 9 wraps around the mold 10 as shown in Fig. 3.

When the movement of the carriage 22, and with it the mold 10, stops, the device 13 lowers and carries with it a double film 8 25 as shown in Figures 3 and 4.

As the carriage 22 moves to the left, and as the device 13 moves downwards, the necessary amount of films 6 and 7 are discharged from the rollers 1 and 2, the edges of which are heat-sealed in the device 5, a double film 8 is formed.

When the device 13 has reached its lower position, Figures 4 and 5, the heat seal device 16 all four films together using a mating piece 15. The guide 19 pushes the films into the fastening device 35 and the cutter 18 cuts the films using the groove 17 between the heat sealer 16 and the fastening device 9.

93434 5 The nozzle 24 of the filling device 23 protrudes from its initial position above the mold 10 and engages the valve 3 as shown in Fig. 4 and at the same time supports the finished tube 29. The new valve 3 is attached to the membrane 6 from the roller 1 in the device 4, Fig. 5.

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The product 25 from the production line, Fig. 4, comes on the plate 26 between the rails 11 and 12. The lever 27 moves in the groove 28, pushing the product 25 inside the mold 10 into the tube 29.

The parts of the two-part mold 10 slide outwards from inside the tube 29, Fig. 6, leaving the tube 29 inside which the product 25 is free. The filling device 23 fills the air space between the membranes of the tube 29, whereby the inner membrane surrounds the product 25. The filling device 23 detaches the nozzle 24 from the valve 3 when the tube 15 29 is filled and returns to its initial position.

The device 13 rises to its initial position, at which point the package is ready and detached from the device. The halves of the carriage 22 and the accompanying mold 10 in the outer position return 20 to their initial position as shown in Figure 1. Production of the new packaging can begin.

A mold for making a new package pushes the finished package forward, Fig. 7, for example on a conveyor or a packing box.

Claims (6)

6 93434 A packaging method for forming a package and for packaging a product, wherein the package is composed of different films and the product to be packaged is sealed in the package by means of air or other gas blown between the films, characterized by two (6, 7) or more films open at both ends and that a valve (3) is attached to at least one membrane and the membranes are sealed together (5) at their edges to form a two- or more-layer membrane (8), the end of which is fixed (9) and the package consists of a membrane (8) in a two-part mold (10) and the package is sealed (16), cut (18) and the product (25) to be packaged moves into the mold (10) and the two parts of the mold 15 move apart and the intermediate space of the package films is filled (23, 24) with air or other gas. ) the inner film shapes around the product (25) to be packaged and attaches the product to the package (29). Method according to Claim 1, characterized in that the package consists of a film (8) around the movable mold (10). Method according to Claim 1 or 2, characterized in that the mold (10) is partially or completely without a base. Method according to one of Claims 1 to 3, characterized in that the mold (10) is interchangeable to form packages of 30 different sizes and shapes. Method according to one of Claims 1 to 4, characterized in that the filling device (23, 24) is arranged according to the size of the mold (10) and enables the intermediate space 35 of the films to be filled automatically with air or another gas. 93434 7 A method of forming a package for packaging a product, wherein the package is composed of different films and the product to be packed is sealed in the package by means of air or other gas blown into the films, characterized in that a valve is attached to at least one film 3) and the films are seamed together at their edges (5) into a film hose (8), the end of which is fixed (9) and the package is formed around the two-part mold (10) by moving the mold (10) to the cross-sealing point and a device (13) for attaching the head, wherein the mold (10) pushes the film hose forward into a packaging blank partially enclosing the mold, which is closed around the mold into an open hose 15 by pressing down said sealing, cutting and attaching device (13), and sealing the packaging blank ( 16) and cut (18) and the two parts of the mold (10) move apart. 8 93434