JPH03286834A - Method of sticking skin object to core - Google Patents

Abstract

PURPOSE:To enable the sticking of a skin object to a core to be surely achieved by a method in which when the skin object is stuck to the core, after the skin object has been drawn into a plurality of the apertures of the core successively with a plurality of suction bodies, the skin object is sucked to the front surface and the recessed surface of the core. CONSTITUTION:The core 6 whose front surface 9 (outer side surface is contained) and recessed surface 10 are coated with an adhesive 8a, is fitted onto the receiving surface 25 of the receiving die 26 of a jig 22. While the rear surface 11 of the core 6 is brought in close contact with the receiving surface 25 of the receiving die 26, a skin object 7 is held on a clamp 54 in tensioned state, and said skin object 7 is heated and softened with a heater 55. While the jig 22 is raised and approached to the skin object 7, two adjacent bodies in three suction bodies 41, 42, 43 are raised to the skin object 7 from the receiving surface 25 of the receiving die 26 through the aperture 12 of the core 6. By sucking air from the upper end of the suction body 41, the skin object 7 si sucked thereto. The suction body 41 which has sucked the skin object 7 is lowered on the receiving surface 25 of the receiving die 26, and a part of the skin object 7 is drawn into the aperture 12 of the core 6, whereby a part of the skin object 7 is caused to oppose to the recessed surface 10 of the core 6.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to a method for attaching a skin to a core material, for example, in the production of interior parts for automobiles.

(Prior Art) For example, as shown in FIG. 16, in an automobile instrument panel 1, a plurality of air conditioner outlet grills 2, audio equipment 3, air conditioner operation panel 4, etc. are arranged. For example, a decorative frame 5 having three openings or a decorative frame 51 as shown in FIG. 17 in which some of the openings of the decorative frame 5 are cut-out parts may be used.

Such decorative frames 5, 51 are used for boat fishing, as shown in FIG. Adhesive layer 8
Openings 12 (including notches) penetrating through the concave surface 10 to the back surface 11 are formed at three locations on the front surface 9 of the core material 6, and the outer surface 7 is attached to the core material 6. It is necessary to adhere not only to the surface 9 (including the outer surface) of the material 6 but also to the concave surface IO.

In this way, the openings 12 (three sides or three sides connected to the concave surface
With respect to the surface 9 (including the outer surface) and concave surface 10 of the core material 6, which has an opening such as a notch surrounded by 0,
As a method for pasting the skin body 7 made of thermoplastic synthetic resin, there is a method disclosed in Japanese Utility Model Application Publication No. 17929/1983.

In this method, the core material 6 is mounted on a vacuum suction jig (vacuum forming mold) with its surface 9 facing upward, and a skin body 7 (sheet) heated and softened is placed above the core material 6. ), the jig and the skin body 7 are brought close to each other, and the skin body 7 is brought into contact with the surface 9 of the core material 6, and then the skin body 7 is attached to the jig through the opening 12 of the core material 6. by adsorbing the skin body 7 to the surface 9 of the core material 6 (
(including the outer surface) and the concave surface IO.

In this method, after the skin body 7 is bonded to the surface 9 of the core material 6, the skin body 7 is bonded to the concave surface 10 of the core material 6, so that only the skin body 7 is bonded to the concave surface IO of the core material 6. As a result, the thickness of the skin body 7 with respect to the concave surface 10 becomes extremely thin, and the skin body 7 with respect to the concave surface 10 is locally strongly stretched, causing wrinkles, unevenness, and tears. Then, a strong repulsive force is generated in the skin body 7 against the concave surface 10 against stretching, making it difficult for the skin body 7 to adhere to the concave surface IO and causing air to form between the core material 6 and the skin body 7. As a result, swelling or loosening may occur in the skin body 7.

Note that this is not a method of attaching the skin body 7 to the core material 6,
JP-A No. 60-32629 discloses a method for making the thickness of the molded product uniform when molding a sheet made of thermoplastic synthetic resin into a predetermined shape to make the thickness of the molded product uniform. A method has been shown in which a rod is provided so that it can move in and out, and as molding progresses, the rod is moved back from a protruding state into the interior of the vacuum forming mold, but this method is not effective when the sheet is thick. However, if the sheet is thin, the rod may break through the sheet, so it is suitable for manufacturing molded products, but when attaching the skin 7 to the core material 6. Not suitable.

(Problems to be Solved by the Invention) As described above, in the conventional method, the surface 9 of the core material 6 and the concave IC, which have openings 12 penetrating the back surface 11 via the concave surface 10 at multiple locations on the surface 9, are On the other hand, when attaching the skin body 7 made of thermoplastic synthetic resin, the thickness of the skin body 7 with respect to the concave surface 10 may become extremely thin, or the skin body 7 with respect to the concave surface 10 may be locally strongly stretched, causing wrinkles. It may become uneven or tear, and the concave surface 1o
Since a strong repulsive force is generated in the skin body 7 against stretching, it is difficult for the skin body 7 to adhere to the concave surface 10, and air remains between the core material 6 and the skin body 7, causing the skin body 7 to swell or loosen. may occur.

The present invention was made in view of these points, and the present invention has been made in view of the above points.
With respect to the surface 9 and concave surface 10 of the core material 6 having openings 12 penetrating through the concave surface 10 to the back surface 11 at multiple locations,
The purpose is to uniformly and reliably adhere the skin body 7 made of thermoplastic synthetic resin.

[Structure of the invention]

(Means for Solving the Problems) The present invention provides a method in which the back surface 1
Claim 1 relates to a method of adhering a skin body 7 made of thermoplastic synthetic resin to the surface 9 and concave surface 10 of a core material 6 having an opening 12 penetrating through the core material 6. It is mounted on a vacuum suction jig 22 with the surface 9 facing upward, and a heated and softened skin body 7 is placed above the core material 6, and the skin body 7 is placed in the plurality of openings 12 of the core material 6. A plurality of suction bodies 41, 42, 43 correspondingly provided on the jig 22
through the corresponding opening 12 into the skin body 7, and this raised suction body 41, 42, 43
The skin body 7 is attracted to the upper end, and the suction bodies 41, 42, and 43 that have absorbed the skin body 7 are lowered to draw the skin body 7 into the opening 12 of the core material 6, and a plurality of suction bodies 41 are sequentially drawn into the opening 12 of the core material 6. .42.
43 to attract the skin body 7 and draw it into the opening 12 of the core material 6, the jig 22 and the skin body 7 are brought close to each other, and the jig 22 attracts the skin body 7, and the skin body 7 is pulled into the core material 6. It is brought into close contact with the surface 9 and concave surface 10 of the material 6.

According to a second aspect of the present invention, in the method of claim 1, after the skin body 7 is sucked by the suction body 41, 42, 43 and drawn into the opening 12 of the core material 6, the next suction body 41.42° Before adsorbing the skin body 7 to the jig 43, the jig 22 and the skin body 7 are brought closer to each other little by little.

Furthermore, in the method according to claim 1 or 2, the skin body 7 is suctioned by a plurality of suction bodies 41, 42, 43 in sequence and drawn into the opening 12 of the core material 6, and then the suction body 41.
42. With the adsorption of the skin body 7 by 43 released, the skin body 7 is attracted to the jig 22 and the skin body 7 is attached to the concave surface 1 of the core material 6.
0.

(Function) According to the method of claim 1 of the present invention, when attaching the skin body 7 to the core material 6, the plurality of suction bodies 41, 42° 43,
After the skin body 7 is drawn in order into the plurality of openings 12 of the core material 6, the skin body 7 is adsorbed to the surface 9 and concave surface 1fl of the core material 6, so that the skin body 7 is uniformly stretched as a whole. As a result, the thickness of the skin body 7 adhered to the core material 6 becomes uniform, and the skin body 7 is reliably adhered to the core material 6.

In addition to this, according to claim 2, the jig 22 and the skin body 7
By approaching the previous suction body 41.4 little by little,
The degree of stretching of the skin body 7 that has been stretched by the suction body 2 can be alleviated before being pulled in by the next suction body 42.43. The degree of stretching can be moderated, thereby making the thickness of the skin body 7 stuck to the core material 6 even more uniform.

Furthermore, in addition to this, according to claim 3, by releasing the adsorption of the skin body 7 by the suction body 41, 42° 43 before adsorbing the skin body 7 to the core material 6, the concave surface of the core material 6 can be removed. 1
There is a margin for stretching the skin 7 with respect to 0, thereby making the adhesion of the skin 7 to the concave surface IO of the core material 6 even more reliable.

(Example) An example of a method for attaching a skin to a core material of the present invention will be described with reference to the drawings.

In addition, this embodiment uses PP when manufacturing the decorative frame 5 as shown in FIGS. 16 and 18.

Core material 6 made of PPfi composite material, thermoplastic synthetic resin such as ABS, thermosetting synthetic resin, metal, wood, etc.
A sheet-like skin body 7 made of a thermoplastic synthetic resin such as a PvC solid body, a PvC foam body, or a PP foam body is attached to the body through an adhesive layer 8.

FIG. 1 shows the apparatus used in the implementation, with reference numeral 21 being a base, on which a vacuum suction jig 22 is provided.

As shown in FIG. 2, the jig 22 is mounted on a decompression surface 24 on a base 23 that is raised and lowered by an air cylinder (not shown).
is provided, and the back surface 1 of the core material 6 is provided on this pressure reducing surface 24.
1 is provided with a pressure reducing chamber 27 formed between the base 23 and the pressure reducing surface 24, and a pressure reducing chamber 27 formed between the base 23 and the pressure reducing surface 24, and the receiving surface 25 of the receiving mold 26 is provided with a surface 25 on the top thereof. The holes 28 communicate with each other.

Note that the receiver mold 26 is made of a heat-resistant material such as plaster, SV agent, or epoxy.

The decompression chamber 27 is connected to a decompression tank 32 via a pipe 31 etc., a solenoid valve 33 is interposed between the decompression chamber 27 and the decompression tank 32, and a motor 34 is connected to the decompression tank 32.
A vacuum pump 35 driven by the motor 34 is connected to the vacuum pump 35, and when the vacuum pump 35 is driven by the motor 34, the vacuum tank 3
2 is depressurized, and in this state, when the solenoid valve 33 is switched,
The decompression chamber 27 is depressurized, and thereby the plurality of suction holes 2
Air is sucked into the decompression chamber 27 from the vacuum chamber 8, and the skin body 7 is adsorbed.

Further, the receiving mold 26 of the jig 22 is provided with three suction bodies 41, 42, 43 in the shape of a rectangular cylinder with a bottom corresponding to the plurality of openings 12, for example, three openings 12 of the core material 6. The suction bodies 41, 42, and 43 are each independently connected to the air cylinder 44.
This allows the receiver to protrude and retract from the surface 25 above the mold 26.

Each suction body 41, 42, 43 is independently connected to a decompression tank 48 via a pipe 47 or the like,
A solenoid valve 49 is interposed between each suction body 41, 42, 43 and the decompression tank 48, and a vacuum pump 51 driven by a motor 50 is connected to the decompression tank 48. When driven, the pressure in the decompression tank 48 is reduced, and in this state, when the solenoid valve 49 is activated, air is sucked into the decompression tank 48 from the upper end of the corresponding suction body 41, 42, 43, and the skin body 7 is adsorbed. It looks like this.

Note that 54 is a clamp that holds the peripheral portion of the skin body 7, and in FIG. 3, 55 is a heater that heats the skin body 7 to soften it.

When attaching the skin 7 to the core material 6 using this device, first apply adhesive to the surface 9 (including the outer surface) and the concave surface 10, as shown in FIG. The core material 6
The receiver of the jig 22 is mounted on the surface 25 of the mold 26, and the back surface 11 of the core material 6 is brought into close contact with the surface 25 of the mold 26, and the skin body 7 is held in tension with the clamp 54. This skin body 7 is heated with a heater 55 to soften it.

When the skin body 7 has sufficiently softened and sagged as shown in FIG. 4, the jig 22 is raised toward the skin body 7 to a predetermined position A as shown in FIG. At the same time, two of the three suction bodies 41, 42, and 43 of the jig 22 are connected to the skin body 7 from the face 25 of the mold 26 through the opening 12 of the core material 6. raise towards.

At this time, air is sucked from the upper end of the suction body 41 located on the outer side of the two rising suction bodies 41 and 42, and the skin body 7 is attracted to the upper end of this suction body 41.

Next, as shown in FIG. 6, the suction body 41 that has absorbed the skin body 7 is lowered to the surface 25 of the mold 26, and the suction body 41 that has absorbed the skin body 7 is
A part of the skin body 7 is drawn into the opening 12 of the core material 6, and a part of the skin body 7 is made to face the concave surface lO of the core material 6.

Note that during this retraction, the skin body 7 touches the surface 9 of the core material 6.
Since the skin body 7 is not in close contact with the clamp 54, the skin body 7 is uniformly stretched over a wide range IML within the clamp 54.

Further, during this retraction, the skin body 7 drawn into the opening 12 slides on the adjacent suction body 42 in the raised state, and the adjacent suction body 42 in the raised state It acts as a guide for the skin body 7 to be drawn in.

Since the descending distance of the suction body 41 during this retraction is shortened due to the rise of the jig 22 to the previous position A, the degree of stretching of the skin body 7 is relaxed.

Next, as shown in FIG. 7, the jig 22 is raised toward the skin body 7 to a predetermined position B, and
The remaining suction body 43 is raised from the receiving surface 25 of the receiving mold 26 toward the skin body 7 through the opening 12 of the core material 6.

Note that when the jig 22 is raised, the degree of stretching of the skin body 7 that has been stretched by the previous suction body 41 is relaxed.

Next, as shown in FIG. 8, air is sucked from the upper end of the suction body 42 located at the center that has been raised earlier, and the skin body 7 is attracted to the upper end of this suction body 42.

Next, as shown in FIG. 9, the suction body 42 that has newly absorbed the skin body 7 is lowered to the surface 25 of the mold 26, and a part of the skin body 7 is sucked into the opening 12 of the core material 6. Bow included, epidermis 7
A part of the core material 6 is made to face the four sides 10 of the core material 6.

Note that during this retraction, the skin body 7 touches the surface 9 of the core material 6.
Since the skin body 7 is in close contact with only a part of the skin body 7, the skin body 7 is uniformly stretched over a relatively wide range M.

Further, during this retraction, the skin body 7 drawn into the opening 12 slides on the adjacent suction body 43 in the raised state, and the adjacent suction body 43 in the raised state It acts as a guide for the skin body 7 to be drawn in.

Since the descending distance of the suction body 42 during this retraction is shortened due to the rise of the jig 22 to the previous position B, the degree of stretching of the skin body 7 is relaxed.

Then, as shown in FIG. 10, the jig 22 is raised toward the skin body 7 to a predetermined position C and brought close to it.

Note that when the jig 22 is raised, the degree of stretching of the skin body 7 that has been stretched by the previous suction body 42 is relaxed.

Next, as shown in FIG. 11, air is sucked from the upper end of the remaining suction body 43 located on the outside,
The skin body 7 is adsorbed onto the upper end of 3.

Next, as shown in FIG. 12, the suction body 43 that has finally absorbed the skin body 7 is lowered to the surface 25 of the mold 26, and
A part of the skin body 7 is drawn into the opening 12 of the core material 6, and a part of the skin body 7 is made to face the concave surface IO of the core material 6.

Note that during this retraction, the skin body 7 touches the surface 9 of the core material 6.
Since the skin body 7 is in close contact with only a part of the skin body 7, the skin body 7 is uniformly stretched over a relatively wide range N.

Since the descending distance of the suction body 42 during this retraction is shortened due to the rise of the jig 22 to the previous position C, the degree of stretching of the skin body 7 is relaxed.

After the skin body 7 is drawn into the three openings 12 of the core material 6 in this way, the skin body 7 remains adsorbed on the three suction bodies 41, 42, and 43, as shown in FIG. In this state, raise the jig 22 to a predetermined position, and the receiver
The entire body is covered with the skin body 7.

Then, as shown in FIG. 14, three adsorbents 41.4
The suction of the skin body 7 according to step 2.43 is released, and a part of the skin body 7 that has been drawn into the opening 12 of the core material 6 is loosened relative to the concave surface 10 of the core material 6.

Next, as shown in FIG.
The skin body 7 is adsorbed onto the surface 9 of the core material 6 (including the outer surface) and the concave surface IO with an adhesive layer 8 made of an adhesive 8a.
The skin body 7 is adhered to the surface 9 (including the outer surface) and the concave surface 10 of the core material 6.

After the skin body 7 is attached to the core material 6 in this way, the suction of the skin body 7 by the plurality of suction holes 28 is released, and then the core material 6 is attached to the jig 22 by an appropriate method. 26, and finally, terminal processing such as removing unnecessary terminal portions of the skin body 7 is performed.

In the above-mentioned process, the receiver is designed so that the process up to suction of the skin body 7 by the plurality of suction holes 28 of the mold 2G is performed while the skin body 7 is softened and can be freely stretched. It has become.

As described above, when attaching the skin body 7 to the surface 9 (including the outer surface) and the concave surface 1G of the core material 6, the three suction bodies 41.
42.43, the skin body 7 is attached to the three openings 12 of the core material 6.
After pulling in the core material 6 in order, the skin body 7 is adsorbed to the surface 9 and concave surface 10 of the core material 6, so that the skin body 7 is stretched uniformly as a whole, and thereby the skin body 7 is attached to the core material 6. Epidermal body 7
The thickness of the skin body 7 becomes uniform, and the skin body 7 is reliably attached to the core material 6.

Then, by raising the jig 22 little by little, the degree of stretching of the skin body 7 that has been stretched by the previous suction body 41.42 can be adjusted before being retracted by the next suction body 42.43. At the same time, it is possible to reduce the degree of stretching of the skin body 7 by the next suction body 42, 43, thereby making the thickness of the skin body 7 stuck to the core material 6 even more uniform. becomes −.

Furthermore, before adsorbing the skin body 7 to the core material 6, the suction body 41
．． By releasing the adsorption of the skin body 7 by 42.43, there is a margin for stretching the skin body 7 against the concave surface 10 of the core material 6, and thereby, the adhesion of the skin body 7 to the concave surface 10 of the core material 6 is made easier. It becomes even more certain.

Note that the thickness of the skin 7 attached to the core material 6 is
heating temperature and heating time, degree of elongation of the heated and softened skin 7, size of the skin 7, size and shape of the core material 6, size, shape and depth of the opening I2 of the core material 6, etc. Since it is affected by the conditions, it is necessary to adjust the raised positions A, B, C, etc. of the jig 22 as appropriate.

Also, f: in the real #tsuba mentioned (t, three IR da tβ11
゜Using 42 and 43 one by one from the end, cut the skin body 7.
were drawn into the three openings 12 one by one from the ends, but the present invention is not limited to this, and the two suction bodies 41 and 43 on both sides were used simultaneously to pull the epidermis 7 into the two openings 12 on both sides. After pulling in the skin body 7 at the same time, use the central suction body 42 to remove the skin body 7.
may be drawn into the central opening 12.

Further, in the above-described embodiment, the number of openings 12 in the core material 6 is three, but the present invention is not limited to this, and may be applied to a case where the number of openings 12 is two or four or more.

〔Effect of the invention〕

As described above, according to the present invention, when attaching the skin body to the core material, the skin body is drawn into the plurality of openings of the core material in order by the plurality of suction bodies, and then the skin body is attached to the core material. Since it sticks to the surface and concave surface of the material, the skin is stretched uniformly as a whole, which makes the thickness of the skin adhered to the core material uniform and ensures that the skin adheres to the core material. It is pasted.

In addition, according to claim 2, by bringing the jig and the skin body closer to each other little by little, the degree of stretching of the skin body that has been stretched by the previous suction body can be reduced by the next suction body. In addition, it is possible to reduce the degree of stretching of the skin body by the next suction body, thereby making the thickness of the skin body stuck to the core material even more uniform. .

Furthermore, in addition to this, according to claim 3, by releasing the suction of the skin by the suction body before adsorbing the skin to the core material, there is a margin for stretching the skin against the concave surface of the core material. This makes the adhesion of the skin body to the concave surface of the core material even more reliable.

[Brief explanation of the drawing]

1 to 15 show an embodiment of the method of attaching a skin to a core material of the present invention, FIG. 1 is a cross-sectional view of an apparatus used for carrying out the method of the present invention, and FIG. The perspective views and FIGS. 3 to 15 are explanatory diagrams of the process order when implementing the method of the present invention, and FIG. 16 is a perspective view showing the state of use of a decorative frame to which the method of the present invention is applied. Figure 17 is a perspective view of another decorative frame to which the method of the present invention is applied;
FIG. 8 is a sectional view of the decorative frame shown in FIG. 16. 6. Core material, 7. Skin body, 9. Surface, 10. Concave surface, 11. Back surface, 12. Opening, 22. Jig, 41
．． 42.43...Suction body. -209 "Shi" [20- "Sui JL 1Shi""1-Month"

Claims (3)

[Claims] (1) A method in which a skin made of thermoplastic synthetic resin is attached to the surface and concave surface of a core material having openings penetrating through concave surfaces to the back surface at multiple locations on the surface, the core material being attached to the surface of the core material. At the same time, the above-mentioned skin body which has been heated and softened is placed above the core material, and the above-mentioned jig is placed facing upward on the vacuum suction jig. At least one of the plurality of suction bodies provided on the surface is raised to the skin body through the corresponding opening, the skin body is sucked to the upper end of the raised suction body, and the suction body that has sucked the skin body is After descending and drawing the skin body into the opening of the core material, the skin body is sequentially suctioned by a plurality of suction bodies and pulled into the opening of the core material, and then the jig and the skin body are brought close to each other, and the jig A method for adhering a skin to a core material, the method comprising adhering the skin to the surface and concave surface of the core material. (2) After the skin body is sucked by the suction body and pulled into the opening of the core material, the jig and the skin body are brought closer little by little before the next suction body sucks the skin body. A method of attaching a skin to a core material according to claim 1. (3) After sequentially suctioning the skin body with multiple suction bodies and drawing it into the opening of the core material, with the suction bodies releasing the suction of the skin body, the skin body is suctioned to the jig and the epidermis is removed. 3. The method of attaching a skin body to a core material according to claim 1 or 2, characterized in that the skin body is brought into close contact with a concave surface of the core material.