JP2000008000A - Apparatus and method for bonding skin material to surface of substrate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus and a method for bonding a skin material on the surface of a substrate which enables to bond efficiently in a short time a skin material without changing its shape on a substrate having an extremely uneven surface. SOLUTION: The objective apparatus comprises a lower mold 1 to set a substrate, an upper mold 2 with a freely protruding and recording plug 4 incorporated therein and arranged above the lower mold 1 facing thereto, a skin material-setting mechanism 3 to set a skin material in a freely adjustable tensioned state, fastened or loosened, between the two molds, and a protective plate 5 incorporated in the lower mold side which supports the under side of the rest of the skin material when pressing and temporarily bonding a part of the skin material to a part of the surface of the substrate with the plug 4. The method for bonding the skin material to the substrate between the upper mold and the lower mold comprises pressing and temporarily bonding a part of the skin material with the plug 4 while supporting the under side of the skin material with the protective plate 5, thereby preventing contact thereof with the surface of the substrate, then retreating the protective plate 5 and contact- bonding the skin material to the substrate between the two molds thereby integrating the both.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a base material which can efficiently and quickly adhere a skin material to a base material having a large difference in height due to the formation of a deep recess in a short time. The present invention relates to an apparatus and a method for attaching a skin material to a surface.

[0002]

2. Description of the Related Art As interior parts for automobiles such as door trims, those in which a skin material such as a fabric is adhered to the surface of a wood or resin base material serving as a core material are widely used. With the diversification, as shown in FIG. 8, a deep concave portion is formed, and there is a tendency to use a base material of a complicated shape having a large difference in height.

[0003] However, for a substrate having a complicated shape having such a large difference in height, a substrate with an adhesive is set on a lower mold, which is a conventional crimping method, and the edge of the substrate is located above the lower mold. The skin material gripped by the material setting mechanism is stretched, and the skin material is adhered to the surface of the base material by pressing the skin material with an upper mold that is installed above the lower mold to face the lower mold. When the skin material is adhered, the skin material cannot follow the curved shape of the base material, so that there is a problem that the skin material is torn or peeled. In order to avoid this, it is necessary to satisfy fine bonding conditions such as making the adhesive holding force larger than the tension of the skin material, and further increase the pressing pressure or lengthen the pressing time. It is necessary to satisfy complicated molding conditions such as the above, and it takes a long time for adjustment work, and the molding rate of defective products is high and the production efficiency is extremely low.

[0004]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned conventional problems, and has a deep concave portion formed therein. Completed to provide a method and apparatus for attaching a skin material to a base material surface that can be efficiently attached in a short time without causing defects such as peeling, and that can be applied with a good finish to a shape. It was done.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to a lower mold for setting a base material, and a base material set opposite to the lower mold so as to face the lower mold. An upper mold for pressing a skin material on the upper mold, a skin material setting mechanism for grasping an edge of the skin material set between the lower mold and the upper mold, and adjusting a tension state of the skin material to relax, A retractable plug that is incorporated into the side and presses and temporarily adheres a part of the skin material to a part of the base material surface, and is set between the two molds by the base material and the skin material setting mechanism set in the lower mold. When the plug presses and temporarily bonds a part of the skin material to a part of the surface of the base material so that the plug can be protruded and retracted between the base material and the rest, the remaining part of the skin material contacts the base material. Claims 1. An apparatus for attaching a skin material to a surface of a base material, comprising: In addition, the base material with the adhesive formed with a deep recess is set on the lower mold, and a skin material whose edge is gripped by a skin material setting mechanism is stretched above the base material, In the method of bonding the skin material to the surface of the base material by pressing the skin material with an upper mold opposed to the lower mold, the skin material is set so that the tension state can be adjusted loosely. In addition, before pressing the skin material with the above-mentioned upper mold, first, the tension state of the skin material is loosened, and the lower surface of the outer peripheral portion of the skin material excluding the portion adhered to the concave portion is protected by the protective plate. While supporting and preventing contact with the surface of the base material, a part of the skin material is pressed with a plug to temporarily adhere to the deepest portion of the concave portion of the base material, and then a tensile force is applied to the skin material, and then the protective plate is attached. Lower the upper mold while retracting, and the epidermis on both molds The directed to a method of attaching a skin material to the substrate surface, characterized in that the adhered and integrated to the substrate with the invention according to claim 2.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. The drawing shows a case in which an automobile door trim 20 (see FIG. 8) in which a fabric skin material 22 is bonded and integrated to a base material 21 having a deep concave portion such as a forming base material, and 1 in the figure is deep. The lower mold 2 for setting the base material 21 having the concave portion is installed above the lower mold 1 so as to be movable upward and downward so as to press the skin material on the base material set on the lower mold 1. The mold 3 is a skin material setting mechanism for grasping the edge of the skin material 22 set between the lower mold 1 and the upper mold 2 and adjusting the tension of the skin material 22 to relax. 21 is set on the lower mold 1 in a state where an adhesive is applied to the surface thereof, and a skin material 22 is set above the skin 22 with its edge held by the skin material setting mechanism 3. The lower mold 1
Is pressed by the upper mold 2 opposed to the upper part of the
The point of sticking and integrating the skin material 22 on the surface is basically the same as this type of conventional sticking device, but in the present invention,
The upper die 2 is provided with a plug sliding hole at a protruding portion corresponding to the deep concave portion of the die main body, and presses and temporarily adheres a part of the skin material 22 only to the deepest portion of the concave portion of the base material 21 to this. The plug 4 is incorporated so as to be able to come and go.

Reference numeral 5 denotes a protection plate incorporated in the lower die 1 side. The protection plate 5 is formed by the base 21 and the skin material setting mechanism 3 set on the lower die 1 and the upper die 2 and the upper die 2.
When the plug 4 presses and temporarily adheres a part of the skin material 22 to a part of the surface of the base material 21, Is interposed between the base material 21 and the skin material 22 to support the remaining portion of the skin material 22 with the tip to prevent the skin material 22 from contacting the base material 21;
After a part of the skin material 22 is pressed and temporarily bonded to the surface of the deepest portion of the concave portion of the base material 21, the remaining portion of the skin material 22 is gradually temporarily bonded from the deepest portion of the concave portion to the outer peripheral edge. 22
It is configured to retreat while guiding. That is,
The plug 4 conforms the skin material 22 by pressing and temporarily bonding the skin material 22 corresponding to the deepest portion of the concave portion of the base material 21, preventing local tensile stress from occurring, and causing wrinkles and tears. It is to prevent them. On the other hand, when the protective plate 5 is temporarily bonded by the plug 4,
In addition to preventing the surface material 22 from contacting with the outermost peripheral portion of the concave portion from the deepest portion of the concave portion, the temporary provisional bonding is performed smoothly from the deepest portion to the peripheral portion of the concave portion. This is to prevent the occurrence of tears. In the drawing, reference numerals 3a, 4a and 5a denote driving sources such as air cylinders for operating the skin material setting mechanism 3, the plug 4 and the protection plate 5 by a predetermined amount at a predetermined timing.

Next, a process of forming the door trim 20 by bonding and integrating the skin material 22 to the surface of the base material 21 using the illustrated bonding apparatus will be described. First, as shown in FIG. 1, a substrate 21 having a surface coated with an adhesive is set in a lower mold 1. At this time, the left and right skin material setting mechanisms 3 and 3 and the protection plates 5 and 5 are in an open state, and the upper mold 2 is in the raised position, and the plug 4 built therein is
Is in a protruding state. Next, as shown in FIG.
The protection plates 5, 5 are respectively advanced to predetermined positions, and the skin material 22 is placed on the protection plate 5, and the outer periphery of the skin material 22 is gripped and fixed by the skin material setting mechanisms 3, 3 while maintaining stability. .

Next, as shown in FIG. 3, the protection plate 5 on the right side in the figure with little undulation of the bonding surface is retracted, and the skin material setting mechanism 3 on the right side is advanced, whereby the skin material 22 is relaxed. In this state, no tensile force is applied to the skin material 22. At this time, the left protection plate 5 is in a state of being advanced to a predetermined position between the skin material 22 and the base material 21 and supports the loosened lower surface of the skin material 22, so that the skin material 22 applies the adhesive. There is no contact with the applied substrate 21.

Next, as shown in FIG. 4, the upper mold 2 is lowered with the plug 4 protruding from the mold surface so that the loosened skin material 22 is adapted to the tip of the plug 4 and the right skin is formed. The material setting mechanism 3 is advanced following the lowering of the plug 4 so that the tensile force acting on the skin material 22 is minimized, and the skin material 22 is temporarily bonded at the deepest portion of the concave portion of the base material 21. Then, as shown in FIG. 5, while maintaining the state of the temporary adhesion, the right and left skin material setting mechanisms 3 and 3 are retracted to apply an appropriate tensile force to the skin material 22 to prevent generation of wrinkles and the like. I do. Until this stage, the left and right protection plates 5, 5 are interposed between the base material 21 and the skin material 22 to support the lower surface of the outer peripheral portion of the skin material 22 except for the portion adhered to the recess. Therefore, the base material 21 and the skin material 22 do not adhere to each other except for the deepest portion of the concave portion.

Next, as shown in FIG. 6, by gradually retreating the left protection plate 5, the gap between the base material 21 and the skin material 22, which has been prevented by the interposition of the protection plate 5, has been avoided. As the protective plate 5 is retracted, the skin material 22 is gradually temporarily bonded from the deepest portion of the concave portion where the temporary bonding has already been completed toward the outer peripheral edge. At this time, if an excessive tensile force acts on the skin material 22, it may cause peeling or the like. Therefore, the upper die 2 is slightly lowered, and the holding member 6 vertically suspended on the upper die 2 sets the skin material setting mechanisms 3, 3. It is preferable to adjust the height so that the skin material 22 has an appropriate tensile force by forcibly pressing and descending.

Next, as shown in FIG. 7, the upper mold 2 is completely lowered and the plug 4 is stored in the upper mold 2 while being clamped. And the substrate 21 are adhered and integrated. After that, open the mold and make the skin material 2
2 takes out the door trim 20 bonded and integrated on the surface of the base material 21 and returns each member to the initial position to prepare for the next production.
May be continuously produced.

The thus obtained door trim 20
In a state where the skin material 22 is pressed without applying a tensile force, a part of the skin material 22 is temporarily bonded to the deepest portion of the concave portion of the base material 21, and then the skin material 22 is subjected to a tensile force. Since temporary bonding is gradually performed from the deepest part toward the outer peripheral edge, the entire body is fully bonded, so that defects such as tearing or peeling of the skin material 22 occur even for the base material 21 having a large difference in height. Without sticking, it is possible to adhere uniformly. In addition, by performing temporary bonding in the previous process, the pressing force at the time of the actual bonding can be reduced to about 1 kgf / cm ² and the pressing time can be reduced to about 10 seconds, both of which are about half the conventional values. It will demonstrate the nature.

[0014]

As is apparent from the above description, the present invention causes defects such as tearing or peeling of the skin material even on a base material having a height difference due to the formation of a large deep concave portion. It can be efficiently applied in a short time without any difficulty, and can be stably adhered to the surface shape of the base material. Therefore, the present invention greatly contributes to the development of industry as an apparatus and a method for attaching a skin material to a substrate surface which has eliminated the conventional problems.

[Brief description of the drawings]

FIG. 1 is a molding process diagram showing a preferred embodiment for carrying out the method of the present invention using the apparatus of the present invention.

FIG. 2 is another molding process diagram showing a preferred embodiment for carrying out the method of the present invention using the apparatus of the present invention.

FIG. 3 is another molding process diagram showing a preferred embodiment for carrying out the method of the present invention using the apparatus of the present invention.

FIG. 4 is another molding process diagram showing a preferred embodiment for carrying out the method of the present invention using the apparatus of the present invention.

FIG. 5 is another molding process diagram showing a preferred embodiment for carrying out the method of the present invention using the apparatus of the present invention.

FIG. 6 is another molding process diagram showing a preferred embodiment of carrying out the method of the present invention using the apparatus of the present invention.

FIG. 7 is another molding process diagram showing a preferred embodiment for carrying out the method of the present invention using the apparatus of the present invention.

FIG. 8 is a perspective view showing a door trim obtained by the present invention.

[Explanation of symbols]

 Reference Signs List 1 lower die 2 upper die 3 skin material setting mechanism 4 plug 5 protective plate 21 base material 22 skin material

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4F100 AS00B BA02 CB00 DD01A DG11 EC182 EJ202 EJ372 EK04 GB33 JK06 JK14 JL02 4F211 AA00 AC03 AD05 AD06 AF01 AF07 AG03 AG05 AH26 TA03 TA13 TC06 TJ14 TJ22 TN60 T0906 MA8 PA20 PB08 PB19 PB20 PB21

Claims (2)

[Claims] 1. A lower mold (1) for setting a substrate, and the lower mold
An upper die (2) that presses the skin material onto a substrate set on the lower die (1) facing the upper part of (1), and the lower die (1) and the upper die
(2) A skin material setting mechanism (3) that grasps the edge of the skin material to be set between and adjusts the tension of the skin material loosely, and an upper mold
(2) A plug (4) which is installed on the side and which can press and temporarily adhere a part of the skin material to a part of the base material surface,
The plug (4) incorporated in the lower mold (1) side so that it can appear and disappear between the base material set in (1) and the skin material set between both molds by the skin material setting mechanism (3) A protective plate (5) for preventing the rest of the skin material from contacting the base material when pressing and temporarily bonding a part of the skin material to a part of the base material surface. Equipment to stick skin material to material surface. 2. A base material with an adhesive having a deep recess formed thereon is set on a lower mold, and a skin material whose edge is gripped by a skin material setting mechanism is stretched above the base material. In the method of bonding the material to the surface of the base material by pressing the material with the upper mold opposed to the lower mold, the skin is set so that the tension state can be adjusted loosely. Before pressing the skin material by the above-mentioned upper die, first, the stretched state of the skin material is loosened, and the lower surface of the outer peripheral portion of the skin material excluding the portion adhered to the concave portion is supported by the protective plate. A part of the skin material is pressed with a plug while temporarily preventing the contact with the surface of the base material, and temporarily bonded to the deepest portion of the concave portion of the base material, and then the protection plate is retracted by applying a tensile force to the skin material. Lower the upper mold while applying the skin material to the substrate with both molds A method of attaching a skin material to the surface of a base material, which is characterized in that the skin material is integrated.