JPH11123763A - Bonding method for thermoplastic synthetic resin sheet with edging function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate a waste of an edging material and allow a metallic foil to be used for edging. SOLUTION: A regulating frame 4 is provided on a surface plate 2, two bonding sheets 6, 7 to be received are processed to be in predetermined dimensions, and an edging 8 in a different colour is applied on an upper surface of the bonding sheet. The edging 8 is applied to a predetermined position on the bonding sheet 7 and the outer edge of the edging is substantially aligned with an edge 5a of a blade of an electrode mold 5. The metal mold 5 is then lowered and when a high-frequency dielectric heating is effected, the edge performs welding and cutting while at the some time it welds the sheets at a portion along a plate member 5b, whereby a decorative cover having a decorative edge around a peripheral edge of the sheets is formed through a single process. When a metallic foil is used for edgeing 8, an insulating sheet 9 other than the bonding ones is inserted for prevention of the generation of sparks.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for bonding a thermoplastic synthetic resin sheet with a border by performing simultaneous fusing by dielectric heating with high frequency.

[0002]

2. Description of the Related Art When a cover such as a book cover, a notebook, a case or a cover of a binder or the like is formed of a thermoplastic synthetic resin sheet, a method of forming a decorative border simultaneously with the forming is described in, for example, A method described in Japanese Patent No. 2233 has been proposed. This edging method
A plurality of adhesive sheet materials made of a thermoplastic synthetic resin cut into a predetermined shape and a frame plate for rimming of the same material having different colors are sequentially laminated on a molding machine. The simultaneous welding and fusing is performed by dielectric heating by high frequency using the pressing plate and the metal frame type which is the electrode for simultaneous fusing and welding as electrodes.

In this bonding method, a portion along an inner edge of a frame plate and a bonding sheet material are welded and, at the same time, an outer peripheral portion is welded and cut by a metal frame-type cutting edge. Can be formed.

[0004]

However, in the conventional bonding method with a border, a border frame plate must be prepared in addition to the bonding sheet material, and the material is formed when the frame plate is formed or melted. There was a drawback that loss increased.

[0005] Further, since the border frame plate is configured to be in contact with the metal frame mold, the material to be colored is limited, and a metal foil or the like which may cause discharge during welding cannot be used.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide a method for bonding a thermoplastic synthetic resin sheet with a border in which a material for the border is not wasted and a metal foil can be used for the border.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a method for bonding a thermoplastic synthetic resin sheet with a border. A regulating frame for accommodating the sheet is provided, and the bonding sheet material and the framing frame material are stacked in the regulating frame, and the simultaneous bonding and fusing of the thermoplastic synthetic resin sheet is performed by dielectric heating by high frequency. The bonding sheet material is a fixed-size sheet material cut into a shape that is closely fitted to the regulation frame, and the border frame material is
The edge is bonded to a predetermined position of the fixed size sheet material, and the edge of the electrode for simultaneous fusing is pressed along the outer edge of the edge to perform simultaneous fusing.

As the thermoplastic synthetic resin sheet, vinyl chloride is mainly used, but any material other than vinyl chloride can be used as long as it can be melt-bonded by high frequency. In order to fit the adhesive sheet material formed of such a material in close contact with the regulation frame, the size is fixed by so-called punching. A border is adhered to a predetermined position of the fixed-size sheet material by a predetermined width with a different color by printing or hot stamping, and the outer edge of the border is made to substantially coincide with the cutting edge of the electrode for simultaneous fusing and welding.

When the metal foil is bonded by performing the edging by hot stamping, it is possible to prevent the occurrence of a spark by inserting an insulating sheet other than the bonding sheet material. This insulating sheet can be made as thin as 0.01 to 0.02 mm, and the blade and step of the electrode for simultaneous fusing and welding may be processed with a Teflon thin film having excellent heat resistance and peelability.

[0010]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is an explanatory view of a method for bonding with a border, and FIGS. 2 and 3 are partially enlarged sectional views of a high-frequency welder showing a molding step. The high-frequency welder applies a high-frequency electric field to a thermoplastic synthetic resin sheet having a large dielectric power factor to generate heat and melt-bonds the sheet. The high-frequency welder has an electrode 1 for simultaneous fusing and a surface plate 2 that also serves as a fixed electrode.

An insulating plate 3 made of a material such as bakelite is placed on the surface plate 2, and a regulating frame 4 for accommodating a thermoplastic synthetic resin sheet is provided around the insulating plate 3. The restricting frame 4 is formed of a material that is not subjected to dielectric heating, and the inner size of the restricting frame 4 is set to a size in which an adhesive sheet material made of a thermoplastic synthetic resin is closely fitted.
In addition, a notch 4 is provided on one side to take out the processed sheet material.
Open a.

The electrode 1 for simultaneous fusing is a metal base plate 1a.
An electrode mold 5 formed by bending a brass band material into a predetermined shape is protruded from the lower surface of the substrate. As shown in FIG. 2, the electrode mold 5 includes a blade 5a having a sharpened tip and a plate 5b located slightly above the tip of the blade, and a molten sheet material is accommodated between the plate 5b and the blade 5a. A groove 5c is provided.

Each of the two adhesive sheet materials 6 and 7 accommodated in the regulating frame 4 is processed to a fixed size, and the sheet material 7 placed on the upper surface is printed in different colors by printing or hot stamping. A border 8 is applied. The rim 8 is bonded to a predetermined position of the bonding sheet material 7 so that the outer edge thereof and the cutting edge 5a substantially coincide with each other.

When the metal mold 5 is lowered to perform dielectric heating by high frequency, as shown in FIG.
Since the welding and cutting of 7 are performed and the portion along the plate material 5b is welded at the same time, the front body having a decorative edge on the periphery is formed in one step.

The border 8 can be formed by hot stamping. However, since the hot stamping film has a vapor-deposited metal layer such as aluminum, in this case, as shown in FIG. Prevents sparks from being pinched.

[0016]

As described above, the method for bonding a thermoplastic synthetic resin sheet with a border according to the present invention involves cutting an adhesive sheet material into a shape that fits tightly to a regulating frame and then cutting a sheet material of a fixed size. Since the edge is given at a predetermined position, and the cutting edge is pressed along the outer edge of the edge to perform simultaneous welding and fusing,
There is no need to prepare a frame for edging, and waste of material when forming the frame is eliminated. Further, the edge portion remains as it is at the time of fusing, so that little loss of material occurs.

According to the second aspect of the present invention, an insulating sheet other than the sheet material for bonding is sandwiched between the electrode for simultaneous fusing and the fixed size sheet material, so that spark generation can be prevented. It is also possible to use metal foil for edging.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a bonding method with a border.

FIG. 2 is a partially enlarged cross-sectional view of a high-frequency welder showing a forming step.

FIG. 3 is a partially enlarged cross-sectional view of a high-frequency welder showing a molding step.

FIG. 4 is a partially enlarged cross-sectional view of a high-frequency welder showing a forming step.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Simultaneous fusing electrode 2 Surface plate 4 Regulation frame 5 Electrode mold 6 Adhesive sheet 7 Adhesive sheet 8 Edge

Claims (2)

[Claims] 1. A high-frequency welder having an electrode for simultaneous fusing and welding is provided with a regulating frame for accommodating an adhesive sheet made of a thermoplastic synthetic resin, and an adhesive sheet material and a frame material for trimming are laminated in the regulating frame. In the bonding method with a border of a thermoplastic synthetic resin sheet that performs simultaneous fusing with dielectric heating by high frequency, the bonding sheet material is a fixed-size sheet material cut into a shape that is closely fitted to a regulating frame, The edging frame material is a rim to be adhered to a predetermined position of the fixed-size sheet material, and the fusible simultaneous fusing is performed by pressing the cutting edge of the electrode for simultaneous fusing along the outer edge of the rim. Bonding method for bordering thermoplastic synthetic resin sheet. 2. The border frame material is a border for bonding a metal foil to a predetermined position of a fixed sheet material by hot stamping, and is bonded between an electrode for simultaneous fusing and a fixed sheet material. 2. The method for bonding a thermoplastic synthetic resin sheet with a border according to claim 1, wherein the simultaneous fusing is performed by sandwiching an insulating sheet other than the sheet material for use.