JP3465124B2 - Partial bonding method of laminated materials - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for adhering laminated materials used as trim covers for automobile seats, car interior parts and various other products, and more particularly to adhesives only on predetermined surface areas of the laminated materials. The present invention relates to a method of partially adhering laminated materials to each other by partially adhering.

[0002]

2. Description of the Related Art Conventionally, in order to manufacture a trim cover in which a skin material, a slab material, and a backing material are laminated, the surface of the slab material is heated to form a frame laminate or an adhesive is applied to completely bond the opposite surfaces. It is usually processed. However, in this trim cover, a frame laminate or a solidified layer formed by an adhesive intervenes over the entire surface, which causes a decrease in cushion performance or a loss of feeling.

To partially bond the laminate, use FIG.
A press-molding die consisting of an upper die m ₁ that moves up and down and a lower die m ₂ with a built-in heater H is applied to the lower die m ₂ where the skin material 1 and the slab material 2 are not bonded. This can be done by placing the heat insulating material P correspondingly so as not to partially melt the hot melt adhesive previously applied to the slab material 2. At this time, it is troublesome to cut the slab material 2 along with the skin material 1 and the backing material 3 in accordance with a predetermined contour shape and then stack them. There is no choice but to perform an adhesive treatment with the applied slab material.

[0004]

SUMMARY OF THE INVENTION According to the present invention, an adhesive is partially applied to a predetermined surface area of a laminated material to efficiently manufacture a laminated material having good cushioning properties and feeling, and the cost can be reduced. It is an object to provide a method for partially adhering laminated materials to each other.

[0005]

According to a method of partially adhering laminated materials to each other according to claim 1 of the present invention, a plurality of adhesive dispensing needles are provided corresponding to predetermined surface regions of the laminated material. The tip of the ejection needle is inserted from the back surface side of the laminated material to a predetermined interlayer position, and the adhesive is injected and adhered from the tip of the ejection needle into the layer of the laminated material.

In the method for partially adhering laminated materials to each other according to a second aspect of the present invention, the tip of the pouring needle is inserted from the backing material side to the interlayer position between the cushion material and the skin material, and the adhesive is applied to the pouring needle. It is designed to be injected and adhered from the tip into the interlayer, and injected and adhered between the relative surfaces of the cushion material and the backing material while the extraction needle is being withdrawn.

In the method of partially adhering laminated materials to each other according to a third aspect of the present invention, an ejection needle of an adhesive is provided on the die surface of the punching die, and the needle is adhered as the punching die moves up and down. The agent dispensing needle is inserted into or withdrawn from the laminated material.

[0008]

According to the method of partially adhering laminated materials to each other according to the first aspect of the present invention, the adhesive is surely injected and adhered into a predetermined layer of the laminated material by a pouring needle to partially adhere the laminated materials to each other. Therefore, the cushioning performance and feeling of the laminated material can be improved in the non-adhesive portion of the adhesive. Also,
Since it suffices to insert the injection needle of the adhesive to the interlayer position of the laminated material, the adhesive can be saved efficiently by partially adhering the adhesive, and the cost can be reduced.

In the method for partially adhering laminated materials to each other according to the second aspect of the present invention, since each laminated material including the backing material is simultaneously adhered, the entire laminated material can be efficiently manufactured at low cost. it can.

In the method for partially adhering laminated materials to each other according to the third aspect of the present invention, since the laminated material can be punched and cut into a predetermined shape and the adhesive can be injected and adhered to a predetermined surface area at the same time, adhesion in the laminated material having a predetermined shape It is possible to accurately determine the attachment position of the agent.

[0011]

DETAILED DESCRIPTION OF THE INVENTION Referring to FIGS.
Shows a punching die equipped with an adhesive application device for partially adhering the adhesive to the laminate. The laminated material is made up of a skin material 1, a cushion material 2 such as a slab material, and a backing material 3, and the skin material 1 and the backing material 3 are superposed on each other via the cushion material 2 and bonded and fixed to the three members as a trim cover. Manufactured.

A molten hot melt adhesive is used as the adhesive. The adhesive adhering device is provided with a plurality of adhesive pouring needles 10, 10, ... Corresponding to the adhering surface regions of the laminated materials 1, 2, 3. An adhesive can be supplied to the dispensing needles 10, 10 ... At the same time from the storage tank 11 to the respective tips by the extruder 12.

The punching die comprises an upper die 20 which can be moved up and down and a lower die 21 on which the laminated materials 1, 2 and 3 are stacked and placed. In this punching die, the upper die 20 is provided with a cutting blade 22 for cutting the laminated materials 1, 2 and 3 into a predetermined contour shape. Further, the adhesive attaching device projects each tip of the pouring needles 10, 10 ... To below the die surface of the upper die 20 so as to inject the hot melt adhesive into the surface near the outer periphery of the laminated materials 1, 2, 3. It is equipped with.

Using the punching die, the skin material 1 is positioned on the lower side and the backing material 3 is positioned on the upper side with the cushion material 2 interposed therebetween so that the three members are superposed on the mold surface of the lower mold 21. Place it. The upper die 20 is moved down with respect to the laminated materials 1, 2 and 3, and the laminated materials 1, 2 and 3 are punched and cut by a cutting blade 22 into a predetermined contour shape.

The adhesive injection needles 10, 10 ...
The respective tips are inserted into the layer from the side of the backing material 3 with the descending movement of. The respective tips are inserted into the layers of the laminated materials 1, 2 and 3 until the cutting edge of the cutting blade 22 reaches the bottom dead center for cutting the skin material 1 laminated on the lower side. When the cutting blade 22 reaches the bottom dead center, the tips of the adhesive pouring needles 10, 10 ... Are positioned between the skin material 1 and the cushion material 2. On this occasion,
The tips of the dispensing needles 10, 10, ... May be inserted into the thickness of the skin material 1 to a degree.

When the tips of the dispensing needles 10, 10, ... Have reached the relative surface position between the skin material 1 and the cushion material 2, the adhesive extruder 12 is activated to dispense the adhesive from the storage tank 11. The needles 10 are supplied to the respective tips of the needles 10, and the adhesive 4 is injected and adhered between the skin material 1 and the cushion material 2 as shown in FIG. Since this adhesive 4 is injected from the respective tips of the spouting needles 10, 10, ..., It is scattered in the layers of the laminated materials 1, 2, 3 with a limited area. In addition, the cutting blade 2 of the punching die
It is possible to inject and adhere only to a predetermined surface area of the laminated materials 1, 2 and 3 which are cut into a predetermined contour shape by 2.

When the three members including the backing material 3 are bonded together, the adhesive dispensing needles 10, 10 ... Are withdrawn as the upper die 20 is lifted, and the adhesive 4 is dispensed from the respective tips. The adhesive 4 may be injected and adhered between the cushion material 2 and the backing material 3. After injecting this adhesive into a predetermined layer and adhering it, the laminated materials 1, 2 and 3 can be pressure-bonded with a hot press die to melt the hot melt adhesive and laminate-bond the three members integrally. .

In the laminated material manufactured in this manner, the adhesive 4
Since the respective laminated materials are integrally adhered by partially adhering to each layer of the laminated material with the pouring needles 10, 10, ..., Non-adhesive portions without any adhesive can be efficiently and easily formed. Therefore, it can be formed as a laminated material having good cushioning performance and feeling by the portion.

Further, as shown in FIG. 3, laminated materials 1, 2, 3
At the same time as cutting the contour shape of the above into a predetermined shape, the adhesive can be injected and adhered to a predetermined surface area so that the adhesive is adhered along the outer peripheral surfaces of the laminated materials 1, 2 and 3. The marks 5, 5 ... of the pouring needles 10, 10 ... are extremely small,
Since it is located on the back side of the laminated materials 1, 2 and 3, the skin material 1
It does not damage the surface.

[0020]

As described above, according to the method of partially adhering laminated materials to each other according to the present invention, the adhesive is injected and adhered between the layers of the laminated material to be adhered by a pouring needle. It is possible to efficiently and easily form the non-adhesive portion without the interposition of an adhesive agent. Therefore, it can be formed as a laminated material having good cushioning performance and feeling by the portion, and the consumption amount of the adhesive can be reduced, so that the cost can be reduced. Further, since the laminated material is cut into a predetermined contour shape, and at the same time, the adhesive is partially injected and adhered by the pouring needle, the adhesive is partially accurately determined and the adhesive adhesion process is efficiently performed. be able to.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a punching die for a laminated material, which is equipped with an adhesive attaching device for carrying out the method according to the present invention.

FIG. 2 is an explanatory view showing an injection state of an adhesive by the same method with an enlarged cross section of a laminated material.

FIG. 3 is an explanatory view showing a laminated material manufactured by the same method from the back surface side.

FIG. 4 is an explanatory view showing a bonding press die of a laminated material according to a conventional example.

[Explanation of symbols]

1 skin material 2 cushion material 3 Lining material 4 adhesive 10, 10 ... Adhesive dispensing needle 20,21 Laminated material punching mold 22 cutting blade

Front page continuation (51) Int.Cl. ⁷ identification code FI B29L 31:58 B29L 31:58 (58) Fields investigated (Int.Cl. ⁷ , DB name) B32B 1/00-35/00 B29C 65 / 00-65/82

Claims (3)

(57) [Claims] 1. An adhesive pouring needle is provided on a predetermined surface area of a laminated material so that the laminated materials of a skin material, a cushioning material and a backing material are overlapped and the laminated materials are partially adhered and fixed with an adhesive. Correspondingly, a plurality of needles are provided, and the tip of the pouring needle is inserted from the back surface side of the laminated material to a predetermined interlayer position so that the adhesive is injected and adhered from the tip of the pouring needle into the layer of the laminated material. A method for partially adhering laminated materials to each other characterized by the above. 2. The tip of the pouring needle is inserted from the backing material side to the interlayer position between the cushion material and the skin material, the adhesive is injected and adhered from the tip of the pouring needle into the interlayer, and the pouring needle is The method for partially adhering laminated materials to each other according to claim 1, characterized in that the adhesive is injected and adhered between layers of the cushioning material and the backing material while being extracted. 3. An adhesive injection needle is provided on a die surface of a punching die, and the adhesive ejection needle is inserted into or withdrawn from the laminated material as the punching die is moved up and down. 3. The method for partially adhering laminated materials to each other according to claim 1 or 2.