JP2570783Y2 - Needle-type adhesive sheet type structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press-bonding die for bonding a sheet cover to a surface of a mold pad, and more particularly, to pierce a mold pad with a needle for discharging steam to remove an adhesive on the surface of the mold pad. The present invention relates to a mold structure of a melting needle-type adhesive sheet.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 4, this kind of needle type adhesive sheet mold 23 is composed of an upper mold 24 and a lower mold 35, and a mold pad 21 and a seat cover 22 to which an adhesive is applied. Is pressed and bonded. In the needle type adhesive sheet mold 23, the hollow needle 33 is
4, the pad 21 is pierced from the back side of the mold pad 21 and the tip thereof is
Is formed so as to reach a position close to the surface of the mold pad 21 and to blow out steam from the tip to melt the adhesive applied to the surface of the mold pad 21.

Accordingly, the lower mold 35 is formed with a molding surface 36 that follows the shape of the surface of the mold pad 21, and the inverted mold pad 21 is formed so as to be mountable.
The upper die 24 is formed in a hollow shape having a pressing surface 27. The pressing surface 27 is formed following the lower surface of the mold pad 21 and forms the lower surface of the upper die 24. In addition, upper mold 2
Inside 4, a hollow portion 25 is horizontally partitioned by a partition wall 30 to form a two-tiered structure.

[0004] The upper hollow portion is a steam chamber 25a to which steam is supplied, and a steam port 29 communicating with a steam generator is opened. Furthermore, partition wall 3
A plurality of needle holes 32 penetrate through 0, and hollow needles 33 are vertically provided vertically downward from the individual needle holes 32. The upper ends of these needles 33 do not protrude from the partition wall 30 and are accommodated on the same plane, each having a predetermined length, and
7 and protrudes from the pressing surface 27 by a predetermined length.

The position of the tip of the protruding needle 33 is
When the upper mold 24 presses the mold pad 21, the upper mold 24 pierces the mold pad 21, and a position close to the surface of the mold pad 21 from the inside of the mold pad 21 (the lower mold 3).
5 is set so as to approach the molding surface 36 and reach the rear side of the seat cover 22).

[0006]

However, in the heating and melting step of the adhesive using the adhesive sheet mold 23, the steam supplied to the steam chamber 25a is liquefied in the steam chamber 25a and adheres to the mold. Dropped water gradually accumulates at the bottom of the steam chamber 25a, and the partition wall 30 is covered with water.

[0007] The water collected in the steam chamber 25a as described above is directly discharged from the partition wall 30 to the needle 33.
When the steam is supplied, the steam is supplied to the vicinity of the surface of the pad 21 from the tip of the needle 33 together with the steam. For this reason, water easily accumulates in the pad 21,
Since the pad 21 is often made of urethane foam, the pad 21 is liable to be denatured due to water and high temperature, and is liable to deteriorate in quality. In addition, the adhesive and the quality of the seat cover 22 may be adversely affected, and moisture accumulated in the pad 21 may come out onto the lower mold 35 and stain the periphery of the mold 23.

Therefore, in the present invention, in order to solve the above-mentioned problem, in an adhesive sheet type in which an adhesive applied to the surface of a mold pad is melted by a needle for ejecting steam, water is accumulated in a steam chamber of an upper mold. In particular, it is an object of the present invention to provide a needle-type adhesive sheet type which does not hinder the ejection of steam by a needle.

[0009]

According to the present invention, in order to solve the above-mentioned technical problem, an upper die and a lower die are provided, and a steam chamber is formed in the upper die, and the steam chamber is formed on a partition wall of the steam chamber. A plurality of hollow needles are connected to the steam chamber so as to extend below the pressing surface of the upper mold and penetrate the mold pad, and have the same tip close to the surface of the mold pad to eject steam. A pressure-bonding bonding mold for bonding a seat cover to a mold pad provided and coated with an adhesive, wherein the plurality of hollow needles extend a predetermined length into the steam chamber from the partition wall. A needle type adhesive sheet type structure was created.

[0010]

According to the above construction, even if water accumulates in the steam chamber to which steam is supplied, the needle extends from the partition wall of the steam chamber to a predetermined height in the steam chamber. Is not squirted from the needle with steam.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. Mold pad 1 is the same as before
The frame is made of porous foamed urethane, and the left and right sides are swelled more than the center to form a frame. The seat cover 2 is also cut and sewn into a predetermined shape from a fabric, a leather material, a synthetic resin material, or the like, as in the related art.

Next, a description will be given of a needle type adhesive sheet mold 3 for pressing and bonding the sheet cover 2 and the mold pad 1 formed as described above. As shown in FIG. 1, the adhesive sheet mold 3 includes an upper mold 4 and a lower mold 15. A molding surface 16 is formed on the upper surface of the bonding lower mold 15 so as to follow the surface of the mold pad 1.
Is formed so that it can be inverted and fitted. The lower mold 15 thus formed is set on a base.

On the other hand, the bonding upper die 4 is disposed to face the lower die 15 and is moved up and down by a drive device (not shown). The bonding upper die 4 is formed in a hollow shape and has a double structure. , A steam die 10 and a pressing die 6 forming a pressing surface 7 following the back surface of the mold pad. The pressing die 6 is fixed to the lower surface of the base 5 on the upper part of the upper die 4.
, And is formed in a substantially box shape with an open top. The lower surface of the pressing die 6 is formed on a pressing surface 7 following the rear surface of the mold pad 1, and a part of the pressing die 6 is provided with a steam vent 9 through which a ventilation pipe 9a is further provided. A steam mold 10 is provided inside the pressing mold 6.
Is communicated with the steam room 11 formed by this.

The steam mold 10 is formed in a substantially box shape with an open top, and has a base 5 inside the press mold 6 in the same manner as the press mold 6.
As a result, a steam chamber 11 partitioned by a steam mold 10 is formed in a space 6a formed by the pressing mold 6 and the base 5. The bottom plate 10 a of the steam mold 10 is formed flat, and has a size substantially corresponding to the back surface of the mold pad 1. A ventilation pipe 9a attached to the pressing die 6 is connected to a part of the four circumferences of the steam mold 10 at a predetermined height, thereby connecting the steam chamber 11 and the other end of the ventilation pipe 9a. The generated steam generator is communicated. In this embodiment, the bottom plate 10a is a partition wall according to the first aspect.

The reason why the steam mold 10 is further provided in the upper mold 4 is that the space through which the steam passes is made as small as possible so that the efficiency of the jet of steam from the tip of the needle 13 can be improved efficiently and uniformly. To do that. Upper mold 4
If the volume of the device itself can be reduced,
0 is not particularly necessary.

Further, the bottom plate 10a of the steam mold 10
A plurality of needle holes 12 are formed through almost the entire surface. The hollow needles 13 are respectively attached to the needle holes 12 in a hanging manner. This needle 1
Numeral 3 is made of, for example, a stainless steel pipe having an inner diameter of about 3 to 5 mm, the tip of which is formed to be sharp so that the mold pad 1 can be pierced, and each has a predetermined length.

The upper end of the needle 13 is a steam type 10
Are extended from the bottom plate 10a in the steam chamber 11 by a predetermined length, and the height of each of the needles 13 is the same, and is not higher than the mounting position of the ventilation pipe 9. On the other hand, the needle 13 penetrates the hollow portion 6a, penetrates the pressing die 6, and protrudes downward from the pressing surface 7. That is, when the individual needles 13 protruding from the pressing surface 7 of the predetermined length penetrate the mold pad 1 at the time of pressing, the tips of the needles 13 are close to the surface of the mold pad 1, that is, the seat cover 2. From the rear side of the lower die 15 to a position close to the molding surface 16 of the lower die 15.

The steam chamber 11 and the hollow portion 6a formed outside the steam chamber 11 are completely shut off. Further, a drain port 14 is provided at a predetermined position of the steam mold 10, that is, at a position lower than the mounting height of the ventilation pipe 9a and the height of the needle 13 projecting at a certain height. The drain port 14 is provided with a pressure valve 14a, which is closed until the water reaches the drain port 14, and the water level rises.
When a certain pressure is applied to the valve 14a, the valve 14a is opened to discharge water to the outside of the steam mold 10.

The drain port 14 connects the steam chamber 11 to a water reservoir 17 provided outside the steam mold 10. A part of the water storage 17 is further communicated with a cock (not shown) provided in the pressing die 6, and the water accumulated in the water storage 17 can be discharged to the outside of the upper mold 4 by opening and closing the cock.

Next, the seat cover 2 and the mold pad 1
The step of bonding the two with the needle type adhesive sheet mold 3 will be described. First, the surface of the seat cover 2 is placed and set on the molding surface 16 of the lower die 15 with the surface of the seat cover 2 facing the molding surface 16 side. Then, the mold pad 1 whose surface is coated with an adhesive is fitted and set on the seat cover 2.

When the upper die 4 is moved downward by the driving device, the tip of the needle 13 is pierced from the back of the mold pad 1, and the tip of the needle 13 is gradually moved to a position close to the surface of the mold pad 1. Is reached. That is, the tip of the needle 13 is located inside the pad 1 so as to follow the shape of the surface of the mold pad 1. Further, the pad 1 is pressed by a predetermined pressure.
When the steam generator is operated, the steam is sent to the needle 13 through the ventilation pipe 9a through the steam chamber 11, and is jetted from the tip of the needle 13 toward the adhesive applied to the surface of the mold pad 1. That is, it is ejected to the back side of the seat cover 2.

This steam is a porous mold pad 1
The steam is heated near the surface of the mold pad 1 to directly melt the adhesive applied to the surface of the mold pad 1. On the other hand, while the steam ejection continues, water droplets gradually adhere to the surface in the steam chamber 11, and liquefied steam and the like accumulate on the bottom plate 10 a of the steam chamber 11.

However, the water surface does not reach the height of the needle 13 projecting into the steam chamber 11 during the normal duration of the steam ejection. Even if the amount of water that is liquefied due to excessive steam or a long supply time increases, the water that exceeds the height of the drain port 14 is removed by the drain port 14 provided at a position lower than the height of the needle 13. It is discharged out of 10. Therefore, the water surface can always reach only a position lower than the needle 13. For this reason, the upper end of the needle 13, that is, the inlet of the steam protrudes from the water surface, and water is not ejected from the tip of the needle 13 into the pad 1 together with the steam.

As described above, only the steam is applied to the needle 13.
The adhesive applied from the top of the mold pad 1 and applied to the surface of the mold pad 1 is heated and melted, and the mold pad 1 and the seat cover 2 are brought into close contact with each other. Further, the adhesive is cooled and solidified by blowing or suction, and the seat cover 2 and the mold pad 1 are completely bonded.

Further, after the upper mold 4 is moved upward, the mold pad 1 is pulled out from the needle 13 and the adhesive sheet is taken out. Hereinafter, the mold pad 1 and the seat cover 2 are sequentially bonded by the same procedure.

As described above, the structure in which the needle 13 pierced through the mold pad 1 extends upward in the steam chamber 11 by a predetermined height is provided.
Even if water accumulates in the inside of the mold pad 1, the water does not blow out from the tip of the needle 13 into the mold pad 1. For this reason, the urethane pad 1 made of water, which is a conventional problem,
Of the seat cover 2 and no contamination by water around the mold 3.

Further, the excess water is released through the drain port 14 so that the water can be supplied to the steam chamber 11 above a certain level.
Since the water does not accumulate in the inside, the work can be continuously performed with confidence without checking the water level in the chamber 11.
Further, since the amount of moisture in the mold pad after the steam is blown out is reduced, unnecessary vacuum suction or air blowing for drying the pad 1 becomes unnecessary.

The water discharged from the drain port 14 may be guided to a water reservoir provided outside the upper mold 4 by an appropriate tube. Further, in order to reduce the amount of water accumulated in the steam chamber 11, the inner surface of the steam chamber 11 may be covered with a highly hygroscopic natural or synthetic material. In this case, the water absorbed by the material is air-dried by blowing air into the steam chamber 11 for a predetermined time.

[0029]

As described above, according to the present invention, the tip is extended to a predetermined height in the steam chamber to which steam is supplied, and the needle is vertically installed from the upper mold. In this steam chamber, even if the water in the steam liquefies and accumulates in the steam chamber, only the steam is ejected from the tip of the needle without water entering the needle. As a result, deterioration of the urethane pad due to water, contamination around the mold, and occurrence of poor adhesion can be prevented, and a good adhesive sheet can be manufactured.

[Brief description of the drawings]

FIG. 1 is a sectional view of a needle type adhesive sheet type.

FIG. 2 is a perspective view showing a state in which a base of an upper mold is removed.

FIG. 3 is a sectional view showing a state in which steam is ejected by a needle-type adhesive sheet type.

FIG. 4 is a cross-sectional view showing a state in which steam is ejected by a conventional needle-type adhesive sheet type.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Mold pad 2 ... Seat cover 3 ... Needle adhesive sheet type 7 ... Pressing surface 4 ... Upper die 10a ... Partition wall 11 ... Steam room 13 ... Needle 15 ... Lower die

Claims (1)

(57) [Scope of request for utility model registration] 1. An upper mold and a lower mold, wherein a steam chamber is formed in the upper mold, and a partition wall of the steam chamber communicates with the steam chamber and extends downward from a pressing surface of the upper mold. A plurality of hollow needles are provided so that the mold pad can be pierced and pierce the mold pad, and the tip can be close to the surface of the mold pad so that steam can be ejected. A needle-type adhesive sheet type structure, wherein the plurality of hollow needles extend from the partition wall into the steam chamber by a predetermined length.