JPH0585833U - Adhesive structure of adhesive sheet - Google Patents

Abstract

(57) [Summary] [Purpose] The time required for the solidification of the hot melt adhesive is shortened by smoothing the air flow in the part surrounded by the vertical and horizontal projections of the lower mold. [Structure] After a mold pad 14 is overlaid on the seat cover 12 set in the lower mold 4, the upper mold 1 is clamped to the lower mold 4, and the needles 3 arranged in the upper mold 1 are inserted into the mold pad 14. Under the condition that the hot melt adhesive is rushed into the inside, the hot melt adhesive is melted by jetting steam from each needle 3, and then air is sucked from each needle 3 through the mold pad 14, whereby the hot melt adhesive 1
3 is cooled and solidified, the seat cover 12 and the mold pad 1
4 is an adhesive type structure of an adhesive sheet in which 4 and 4 are adhered to each other, and vertical and horizontal projections 7 and 8 corresponding to vertical and horizontal grooves provided on the sheet cover 12 are formed on the mold surface of the lower mold 4. A plurality of ventilation holes 9 and 10 on the wall surfaces of the vertical and horizontal projections 7 and 8 respectively.
Are pierced respectively.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an adhesive type structure of an adhesive sheet in which a seat cover and a mold pad are adhered by a hot melt adhesive.

[0002]

[Prior Art]

 In this type of adhesive sheet adhesive type structure, needles for jetting steam and sucking air are appropriately arranged in the upper mold, while the lower mold surface has a vertical cover provided on the sheet cover.・ Each vertical and horizontal ridge corresponding to each horizontal groove is projected. When the sheet cover and the mold pad are bonded to each other with a hot melt adhesive by using the upper mold and the lower mold of such a mold structure, first, the mold pad is attached to the sheet cover set on the mold surface of the lower mold. The hot-melt adhesive applied on the surface is placed facing each other. Next, the upper die is clamped to the lower die, and the needles arranged in the upper die are thrust into the mold pad, and steam is ejected from each of the needles. The hot melt adhesive melts. Then, the hot melt adhesive is cooled and solidified by sucking air from each needle through the mold pad, and the seat cover and the mold pad are bonded to each other.

[0003]

[Problems to be solved by the device]

 By the way, in the above-mentioned conventional type, when air is sucked from each needle of the upper die through the mold pad to cool and solidify the hot melt adhesive, the air flow in the portion surrounded by each protrusion of the lower die. However, it took a long time to solidify the hot-melt adhesive to the relevant part, resulting in poor efficiency. In view of the above-mentioned conventional problems, the purpose of the present invention is to smooth the air flow in the portion surrounded by the vertical and horizontal projections of the lower mold, thereby making the hot melt adhesive An object is to provide an adhesive-type structure of an adhesive sheet that can shorten the time required for solidification.

[0004]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides a sheet cover set on a mold surface of a lower mold, a mold pad, a hot melt adhesive applied on the surface of the mold pad, and a hot melt adhesive applied on the surface of the mold pad. The upper die is clamped to the die, and under the condition that the needles arranged in the upper die are thrust into the molding pad, steam is jetted from each of the needles to melt the hot melt adhesive, Thereafter, the hot melt adhesive is cooled and solidified by sucking air from each of the needles through the mold pad, and the sheet cover and the mold pad are bonded to each other. The mold surface of the mold is provided with vertical and horizontal projections corresponding to the vertical and horizontal grooves provided on the seat cover, and a plurality of through holes are provided on the wall surface of the vertical and horizontal projections. Stomata It has been penetrated, respectively.

[0005]

[Action]

 In the adhesive type structure of the adhesive sheet configured as described above, when air is sucked from each needle of the upper mold through the mold pad and the hot melt adhesive is cooled and solidified, it is surrounded by the protrusions of the lower mold. In the open portion, air flows through the ventilation holes penetrating the wall surface of each of these ridges. For this reason, the air flow becomes smooth even in the portion surrounded by the protrusions, and the hot melt adhesive can be rapidly solidified to the portion.

[0006]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. In FIG. 2, which is a cross-sectional view of the adhesive type structure of the adhesive sheet, the inner chamber space 2 of the upper mold 1 is selectively connected to the steam supply source and the negative pressure generation source via a switching valve (not shown).

On the lower surface of the upper mold 1, a large number of needles 3 made of hollow pipes that communicate with the interior spaces 2 are arranged. As shown in FIGS. 2 and 3, the mold surface 6 of the lower mold 4 is provided with vertical and horizontal projections 7 and 8 corresponding to the vertical and horizontal grooves provided on the seat cover 12, respectively. There is. A plurality of ventilation holes 9 and 10 are formed through the wall surfaces of the vertical and horizontal projections 7 and 8, respectively.

Further, the lower mold 4 is provided with a large number of suction holes 11 which are open to the mold surface 6 and suck the seat cover 12 along the mold surface 6, and each suction hole 11 Communicate with the interior space 5 of the lower mold 4 connected to the negative pressure source.

When the seat cover 12 and the mold pad 14 are bonded together with the hot melt adhesive 13 using the lower mold 4 and the upper mold 1, first, the seat cover 12 is placed on the mold surface 6 of the lower mold 4. After being placed, a negative pressure is applied to the inner space 5 of the lower mold 4. Then, the seat cover 12 is attracted to the mold surface 6 of the lower mold 4 by the suction action of each suction hole 11 of the lower mold 4. In this state, the mold pad 14 is superposed on the seat cover 12 with the hot melt adhesive 13 applied to the surface thereof facing each other.

Next, as shown in FIG. 2, the upper mold 1 is clamped to the lower mold 4, and the needles 3 arranged on the upper mold 1 are projected into the mold pad 14. Then, the steam is jetted from each of the above-mentioned needles 3, whereby the hot melt adhesive 13 is melted.

After that, air (outside air) is sucked from each of the needles 3 through the mold pad 14, so that the hot melt adhesive 13 is cooled and solidified, whereby the seat cover 12 and the mold pad 14 are bonded to each other. To be done.

When air is sucked from each of the needles 3 through the mold pad 14 and the hot melt adhesive 13 is cooled and solidified, in the portion surrounded by the protrusions 7 and 8 of the lower mold 4, As shown in FIG. 5, air flows through the ventilation holes 9 and 10 penetrating the wall surfaces of these ridges 7 and 8. For this reason, even in the portion surrounded by the protrusions 7 and 8, the air flow becomes smooth, and the hot melt adhesive 13 is rapidly solidified to the portion.

[0013]

[Effect of the device]

 As described above, according to the present invention, a plurality of ventilation holes are formed through the wall surfaces of the vertical and horizontal projections of the lower mold, respectively, so that air can be generated even in the portion surrounded by the projections. Since the flow of the hot melt adhesive is smooth, the solidification of the hot melt adhesive to the relevant portion can be accelerated. As a result, the time required for bonding the seat cover and the mold pad with the hot melt adhesive can be shortened and the bonding efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a sectional view showing an essential part of an adhesive structure according to an embodiment of the present invention.

FIG. 2 is a sectional view showing an entire adhesive-type structure.

FIG. 3 is a perspective view showing the lower mold in a simplified manner.

[Explanation of symbols]

 1 Upper mold 3 Needle 4 Lower mold 6 Mold surface 7,8 Projection 9,10 Vent hole 12 Seat cover 13 Hot melt adhesive 14 Mold pad

Claims (1)

[Scope of utility model registration request] 1. A mold pad is placed on a sheet cover set on a mold surface of a lower mold so that a hot-melt adhesive applied to the surface of the mold pad faces the surface of the mold pad, and then the upper mold is clamped to the lower mold. In a state in which the needles arranged in the upper mold are thrust into the mold pad, steam is jetted from each of the needles to melt the hot melt adhesive, and thereafter, the mold pad is ejected from each of the needles. The hot melt adhesive is cooled and solidified by sucking air through the adhesive type structure of an adhesive sheet in which the sheet cover and the mold pad are adhered to each other, and the sheet is provided on the mold surface of the lower mold. Vertical provided on the cover
Adhesion characterized in that vertical and horizontal projections corresponding to the horizontal grooves are projected, and a plurality of ventilation holes are respectively formed through the wall surface of the vertical and horizontal projections. Adhesive structure of the sheet.