JPH04189721A - Method and device for heat adhesion of resin packing material - Google Patents

Abstract

PURPOSE:To prevent deformation of a base sheet due to heat to achieve fine packing by a method wherein a case of resin on which a flange is formed is pressed against a hole of an insulated base board, on the edge of which a heat generating body is provided, while the flange of said case only is being heated to thermally bond the flange of said case to said base sheet. CONSTITUTION:A case 18 made of resin is inserted in a direction of an arrow E into a hole 20d of an insulated base board 12 on a conveyor device 15 and a product 16 is inserted into a recess of the case 18, over which a base sheet 19 coated with resin membrane is placed, while the sheet 19 is being positioned by a guide pin 25. When the board 12 is transferred in a direction of an arrow F to a specified position by the device 13, a movable connector 22 is connected to a fixed connector 14 to energize a heat generating body 21 and at the same time a push device 15 lowers a push plate 25 in a direction of an arrow G so that the sheet 19 is pressed against the body 21. The heat generated by the body 21 heats a limited area L near a flange 18a, whereby a part of the flange in the thickness direction is melted so that the flange 18a is thermally bonded to the sheet 19.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method and apparatus for thermally welding resin packaging materials, and in particular to a method and apparatus for thermally welding resin packaging materials. By thermally welding the backing paper to the backing paper, the distortion of the backing paper due to heat is minimized, and the product is packaged in a good-looking manner, improving the product value of the product, as well as saving packaging materials and reducing costs.Resin packaging The present invention relates to a method and apparatus for thermally welding materials.

BACKGROUND ART Referring to FIGS. 6 to 8, the conventional method and apparatus for thermally welding a resin packaging material is to attach a resin case 1 having a flange portion 1a to an insulating base plate 2. After storing the product 3 and the protective sheet 4 into the resin case (in the direction of arrow B), insert the product 3 and the protective sheet 4 into the hole 2a, which has approximately the same shape as the plastic case (in the direction of arrow B), and then cover with the mount 5 to prepare for heat welding. Then, the insulating base plate 2 is conveyed in the direction of arrow C by the conveyor device 6.

When the insulating base plate 2 is conveyed below the heat generating press device 8,
The conveyor device stops, and the heat-generating press device 8 descends in the direction of the arrow to press the press plate 10, whose entire surface is heated to a high temperature by the action of the heat-generating element 9, against the mount 5, thereby applying pressure to the surface of the mount. The flange portion 1a of the resin case 1 made of vinyl chloride or the like is heated through the thinly applied resin film such as vinyl chloride or the like and the mount to melt a part of the resin case 1 in the thickness direction. A method and apparatus for thermally welding the flange portion 1a of 1 and the mount 5 for packaging have been adopted.

However, according to the conventional method and apparatus, since the entire surface (S) of the mount 5 is heated, the entire mount is greatly deformed and distorted by the heat, and it is not only difficult to package neatly, but also the mount In order to prevent deformation of the packaging material 5, the thickness of the mount must be increased, resulting in an increase in weight and packaging cost (FIGS. 7 and 8).

In addition, this method heats the entire surface of the mount 5 regardless of the area required for thermal welding, and in order to heat the press plate with a large heat capacity, the heating element must be constantly energized, which requires a large amount of energy for heating. In addition, a protective sheet 4 is provided between the mount 5 and the product 3 in order to prevent nuclear heat from being transmitted to the product 3 via the mount 5 and deteriorating the performance of the product.
It is necessary to insert the holder, and the insertion work and the cost of the mount 5 are required, and in this sense, the cost of packaging is also high.

Purpose The present invention has been made in order to eliminate the drawbacks of the prior art described above, and its purpose is to provide a heating element having approximately the same width as the flange portion of the resin case at the edge. The resin case is stored in an insulating base plate having a plurality of holes with substantially the same shape as the wooden case, and transported, and the heating element is energized at a predetermined position to close the flange of the resin case. By heating and pressing only the flange part and heat welding the mount, the mount can be prevented from deforming due to heat and can be packaged neatly.This also improves the packaging quality. The aim is to further improve the value of the product, and to reduce the weight of the packaging material and packaging cost by reducing the thickness of the mount.

Another purpose is to thermally weld the flange part and the mount with the minimum amount of energy required by applying electricity only during thermal welding to a heating element placed only in the area necessary for thermal welding. In addition, this prevents heat from being transferred to the product and prevents deterioration of product performance due to heat, and also eliminates the need to insert a protective sheet. The aim is to further reduce costs by eliminating the need for additional costs.

Configuration: In short, the method of the present invention (claim 1) is to provide a resin case in which a flange portion is formed in the hole of an insulating base plate in which a heating element is disposed at the edge of the hole, so that the flange portion is opposed to the heating element. The mount is then stored and conveyed by a conveyor device, and at a predetermined position of the conveyance, the mount is pressed against the flange portion by a pressing device while heating only the precursor flange portion by supplying electric energy to the heating element to generate heat. The flange portion of the resin case and the mount are thermally welded together.

Further, in the device of the present invention (claim 2), in order to accommodate a resin case on which a flange portion is formed, a hole formed in the same shape as the resin case has an edge portion that is substantially the same as the flange portion. an insulating base plate on which a heating element of a width S is disposed and electrical wiring including a movable lid electrically connected to the heating element for supplying electric energy to the heating element; a conveyor device for conveying the base plate together with the resin case housed in the hole; and a conveyor device disposed at a predetermined position of the conveyor device and connected to the movable connector when the insulating base plate is located at the predetermined position S. a fixed connector that supplies electrical energy to the heating element; and a pressing device that is disposed above the predetermined position of the conveyor device and presses the flange portion of the resin case together with a mount against the heating element; The present invention is characterized in that only the flange portion of the manufactured case is heated and pressed against the mount, thereby thermally welding the flange portion and the mount.

The present invention will be explained below based on embodiments shown in the drawings. 1st
Referring to FIG. 3, a thermal welding apparatus 11 for resin packaging materials according to the present invention includes an insulating base plate 12, a conveyor device 13, a stationary evacuator 14, and a pressing device 15.

The insulating base plate 12 is a resin case 1 in which the product 16 is housed.
8 is stored and transported, and the flange portion t8 of the resin case is
It is for thermally welding a and a mount 19, and is composed of a plywood 20, a heating element 21, and a movable connector 22.

The base plate 20 is made up of an upper base plate 20b and a lower base plate 20c with a spacer 20a in between, and a plurality of holes 20d having substantially the same shape as the resin case 18 are formed in the upper base plate 20b. At the edge, a heating element 2 made of, for example, nichrome foil and having approximately the same width as the flange portion 18a of the resin case 18 is provided.
1 is disposed, and a protective material 23 for protecting the heating element 21 is attached so as to cover the heating element. Each heating element 21 is connected in a so-called series connection by a movable connector 22 disposed at a predetermined position on the lower base plate 20c and an electric wiring 24, and when the resin case 18 is inserted into the hole 20d, the flange The portion 18a is the heating element 21
The heating element 21 is configured to heat only the flange portion. In addition, the upper base plate 2
Guide bins 25 protruding from the surface of the upper base plate are fixed at appropriate intervals around the hole 20d of the upper base plate, so that the base paper 19 can be positioned on the insulating base plate 12.

The conveyor device 13 is, for example, a known roller conveyor device, and is adapted to convey in the direction of arrow F the insulating base plate 12 in which the resin case 18 containing the product 16 is housed in the hole 2Od). .

A fixed connector 14 to which electricity is supplied from a power supply device (not shown) is arranged at a predetermined position of the conveyor device 13, and when the insulating base plate 12 is conveyed to a predetermined position, it is connected to the movable connector 22. electrical energy is supplied to the heating element 21 to generate heat.

The pressing device 15 is for pressing the mount 19 against the heating element 21 via the flange portion 18a of the resin case 18 made of hard vinyl chloride, etc. A pressing plate 2 is disposed on the ground and fixed with its plane facing downward by a drive device (not shown).
5 in the direction of arrow G to press the mount 19 against the heating element 21 via the flange portion 18a, and melt the flange portion 18a and the resin film, such as vinyl chloride, coated on the mount 19 with heat. Configured to be welded.

Then, in the method of the present invention, the flange portion 18a of the resin case 18, in which the flange portion taa is formed in the hole of the insulating base plate 12 in which the heating element 21 is disposed at the edge of the hole 20d, is placed opposite to the heating element 21. The flange portion 18 is stored and transported by the conveyor device 113, and at a predetermined position of the transport, electric energy is supplied to the heating element 13 to generate heat.
In this method, the flange part 18a of the resin case 18 and the mount paper 19 are thermally welded by pressing the mount paper 18 onto the flange part 18a using a pressing device II while heating only the flange part 18a.

Function The present invention is constructed as described above, and its function will be explained below. In FIG. 1, conveyor device 13
A resin case l8 made of hard vinyl chloride or the like is inserted into the hole 20d of the upper insulating base plate 12 in the direction of arrow E, and the flange part 18a of the resin case is opposed to the heating element 21, and the product 16 is It is inserted into the recess of the resin case 18, and the mount 19 coated with a resin film such as vinyl chloride is placed over it while positioning it with the guide pin 25 with the resin film facing the resin case 18 (arrow E). Direction) Prepare for heat welding.

Then, the insulating base plate 12 is moved by the arrow F by the conveyor device 13.
When the insulating base plate 12 is conveyed to a predetermined position in the direction, a sensor (not shown) detects this and stops conveyance of the insulating base plate 12. Movable connection at this time? Since the lever 22 is located opposite the fixed connector 14, the movable connector 22 and the fixed connector 14 are connected, and electricity is supplied to the heating element 21. Therefore, the heating element generates heat and transfers the heat to the flange portion 18a via the protective material 23. The temperature of the heating element 21 is, for example, approximately 135"C if the resin case 18 is made of a low-temperature resin, and approximately 135"C if the resin case 18 is made of a high-temperature resin. It is controlled by a temperature control device (not shown) so that the temperature becomes 165''C.

Simultaneously with heating by the heating element 21, the pressing device 15 is driven by a drive device (not shown) to lower the pressing plate 25 in the direction of arrow G to press the mount 19 against the heating element 21 via the flange portion 18a. Referring to FIG. 4 and Part 5, since the heating element 21 is manufactured to have approximately the same width as the flange portion 18a and is disposed at a position facing the flange portion, the heat generated from the heating element 21 The heat is in the flange part 18
It is transmitted only to a very limited part near a, and the part (L) of the flange part 18a and the mount 19 that faces the flange part
is heated to melt a portion of the flange portion 18a in the thickness direction, and the flange portion 18a and the mount 19 are thermally welded.

As mentioned above, since heating is limited only to the part (L) to be thermally welded, that is, the flange portion 18a, even if the backing paper 19 is made thinner, the deformation of the backing paper 19 due to heating is extremely small, making it possible to package neatly. Furthermore, since no heat is applied to the product 16, there is no need to use a protective sheet to protect the product from heat, and the performance of the product is not deteriorated by heat.

Effects - As described above, the present invention provides an insulating base plate in which a heating element having approximately the same width as the flange portion of the resin case is arranged at the edge and a hole having approximately the same shape as the resin case is formed. Store the resin case in the hole and transport it to the specified location.

The flange of the resin case by energizing the base heat body at the position! Since only the flange part and the backing paper are heat-welded by heating and pressing, it is possible to prevent the backing paper from deforming due to heat, making it possible to package neatly, and as a result, packaging quality can be improved. In this case, the value of the product can be further improved, and the thickness of the mount can be reduced to reduce the weight of the packaging material and the packaging cost.

In addition, the heating element placed only in the area necessary for heat welding was energized only during heat welding, so that the heat welding was performed with natural heat.
It is possible to thermally weld the flange part and the mount with the minimum amount of energy required, and as a result, it is possible to prevent heat from being transferred to the product, which prevents deterioration of product performance due to heat, and also reduces the need for protective sheets. Since there is no need to insert
The work of inserting a protective sheet and the cost of the protective sheet are no longer necessary, and in this sense, there is an effect that a part of the cost can be further reduced.

[Brief explanation of drawings]

1 to 5 relate to embodiments of the present invention, in which FIG. 1 is a perspective view of a thermal bonding device for resin packaging materials, FIG. 2 is an enlarged plan view of essential parts of an insulating base plate, and FIG. ■-■ longitudinal cross-sectional view of the second instep,
FIG. 4 is a longitudinal cross-sectional view of a heat-welded resin packaging material, FIG. 5 is a perspective view of the same, and FIGS. 6 to 8 relate to conventional examples;
The figure is a perspective view of a thermal welding apparatus for resin packaging materials, FIG. 7 is a longitudinal sectional view of the thermally welded resin packaging materials, and FIG. 8 is a perspective view of the same. 11 is a thermal welding device for resin packaging materials, 12 is an insulating base plate, 13
is a conveyor device, 14 is a fixed connector, 15 is a pressing device, 1β is a resin case, 18a is a flange portion, 19 is a mount, 20 is a plywood, 20d is a hole, 21 is a heating element, 22 is a movable connector, 24 is an electric It's the wiring. Patent applicant Tamapanoku Co., Ltd.

Claims (1)

[Scope of Claims] 1. A resin case having a flange formed in the hole of an insulating base plate in which a heating element is disposed at the edge of the hole is housed with the flange facing the heating element, The resin case is conveyed by a conveyor device, and at a predetermined position of the conveyance, electric energy is supplied to the heating element to generate heat to heat only the flange portion, and a press device presses the mount against the flange portion. A method for thermally welding a resin packaging material, the method comprising thermally welding the flange portion of the flange and the mount. 2. A heating element having approximately the same width as the flange portion is disposed at the edge of a hole formed in substantially the same shape as the resin case in order to accommodate the resin case on which the flange portion is formed, and the heating element an insulating base plate provided with electrical wiring including a movable connector electrically connected to the heating element for supplying electrical energy to the heating element; and the insulating base plate being transported together with the resin case housed in the hole. a fixed connector disposed at a predetermined position of the conveyor apparatus and connected to the movable connector to supply electrical energy to the heating element when the insulating base plate is located at the predetermined position; a pressing device that is disposed above the predetermined position of the resin case and presses the flange portion of the resin case together with the mount against the heating element, and presses the flange portion of the resin case against the mount while heating only the flange portion of the resin case. A thermal welding device for resin packaging materials, characterized in that the flange portion and the mount are configured to be thermally welded.