JP2765775B2 - Method and apparatus for crimping decorative sheet in automotive interior parts - 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 and a device for crimping a decorative sheet in an automobile interior part such as an automobile door trim.

[0002]

2. Description of the Related Art In recent years, in order to enhance the comfort of a vehicle interior, a method of upgrading the material of an automobile interior part such as an automobile door trim or attaching a decorative sheet such as a cloth to an appropriate position on the surface of the door trim has been proposed. Have been tried.

FIG. 8 schematically shows the structure of a door trim for an automobile.
Is a surface material 2b on a surface of a core material 2a formed into a required shape.
And a decorative sheet 3 such as a cloth which is mounted on the door trim main body 2 at an appropriate position on the surface thereof to further enhance the decorativeness.

[0004] In the conventional method of pressing the decorative sheet 3 against the door trim main body 2, an apparatus shown in Fig. 9 is used.

That is, the conventional crimping device comprises a crimping lower mold 4 for setting the trim body 2, a crimping upper mold 5 for crimping the decorative sheet 3 on the surface of the trim body 2 via an adhesive, As a drive mechanism of the upper die 5, a hydraulic cylinder 6
a, the upper die 5 for crimping is attached to the upper base 6 which can move up and down via a spring 7, and the bar 8 for wood grain that performs terminal treatment of the decorative sheet 3 is fixed to the upper base 6. Have been.

Therefore, as shown in FIG. 10, the operation of the hydraulic cylinder 6a causes the upper base 6 to move down, so that the trim main body 2 and the decorative sheet 3 are moved between the crimping lower mold 4 and the crimping upper mold 5. Is fixed by crimping.

At this time, since the press pressure of the hydraulic cylinder 6a is partially absorbed by the elasticity of the spring 7, the press pressure of the hydraulic cylinder 6a is not the same as the press force applied from the upper crimping die 5.

Further, the upper base 6 further descends,
The crimping upper die 5 is stopped by the spring force of the spring 7, and only the wood grain bar 8 is lowered, and the end portion of the decorative sheet 3 is pressed into the wood grain groove 2 c of the trim body 2, and the decorative sheet 3 is pressed. Is performed.

[0009]

According to the method for crimping a decorative sheet using a conventional crimping apparatus as described above, usually,
In order to obtain good pressure bonding between the trim main body 2 and the decorative sheet 3, a pressing pressure from the pressing upper die 5 is required to be 200 g / cm ² , and a part of the pressing pressure of the hydraulic cylinder 6 a is absorbed by the spring 7. For this reason, it has been pointed out that the press pressure of the hydraulic cylinder must be set to be very large, and the equipment becomes large-scale.

Further, when the press pressure of the hydraulic cylinder 6a is set to be large, the pressure applied to the terminal portion of the decorative sheet 3 from the wood grain bar 8 also becomes large in the wood graining step using the wood grain bar 8, especially the decorative sheet 3
When a PVC sheet is used as the material of the decorative sheet 3, the terminal portion is abnormally stretched and the decorative sheet 3
It has also been pointed out that the terminal portion of the device protrudes, causing a deterioration in appearance.

Further, since the transition to the crimping step of the decorative sheet 3 and the wood graining step of the terminal part of the decorative sheet 3 is determined by the pressing pressure of the hydraulic cylinder 6a and the spring pressure of the spring 7, the timing of entering the wood graining step can be freely set. It has also been pointed out that the work such as adjusting the crimping time becomes very troublesome due to the thickness of the material and the like.

[0012] The present invention has been made in view of such circumstances, and an object of the present invention is to set a decorative sheet at a predetermined position on the surface of a trim main body even if the pressing pressure is set low. , A decorative sheet crimping method and a crimping apparatus which can ensure a good crimping force and a graining pressure, can achieve a compact apparatus without deteriorating quality performance, and can easily adjust the crimping time, graining time, etc. Is to do.

[0013]

SUMMARY OF THE INVENTION To achieve the above object, the present invention provides a method for crimping a decorative sheet on a predetermined portion of a surface of a trim main body, and placing the terminal of the decorative sheet in a wood grain groove provided in the trim main body. In the method of crimping a decorative sheet in an automobile interior part to be press-fitted, the operation of an elevating cylinder lowers a crimping upper die integrally with an upper base, and clamps the crimping upper and lower dies to a predetermined position on a surface of a trim main body. The process of crimping the decorative sheet and removing the air in the air cylinder installed between the upper mold for crimping and the upper base, lowering the upper base, and decorating with a wood grain bar connected to the upper base Press-fitting the end of the sheet into the groove for wood graining of the trim body.

Further, the apparatus used in the method of the present invention is installed via an air cylinder on an upper base which can be moved up and down by a lifting cylinder, and a lower mold for setting a trim main body through an air cylinder. An upper die for crimping a decorative sheet, and a bar for wood grain arranged along the edge of the upper die for crimping and connected to the upper base, for introducing and removing air into the air cylinder. Thus, the pressing force of the upper die for crimping is varied.

[0015]

As is evident from the above configuration, the press pressure is not absorbed by the spring as in the conventional case, and if air is introduced into the air cylinder, the press pressure from the hydraulic cylinder is directly applied to the upper die for crimping. Because it can be applied, the initial pressure can be set to the maximum.

Therefore, since the press pressure of the hydraulic cylinder can be set low, the pressure applied to the decorative sheet terminal at the time of graining can be maintained at an appropriate value, and even if a material that is easily stretched is used, the terminal protrudes from the graining groove. There is no.

Further, if the air is removed from the air cylinder, the process can be shifted from the crimping process to the graining process. By adjusting the timing of removing the air from the air cylinder, the time required for the crimping process and the time required for the graining process can be reduced. Can be adjusted at any time.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a method and a device for crimping a decorative sheet in an automobile interior part according to the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is a sectional view showing the structure of a door trim for an automobile in which a decorative sheet is attached to a door trim body by the method of the present invention. FIG. 2 is a sectional view showing an embodiment of a crimping device according to the present invention. FIG. 3 is a cross-sectional view showing each step of the method of the present invention.

First, referring to FIG. 1, an automobile door trim 10 manufactured by the method and apparatus of the present invention includes a door trim main body 20 and a decorative sheet to be attached to a predetermined portion of the surface of the door trim main body 20, in this embodiment, a waist portion. 30.

Further, the door trim body 20 has a core 21 formed into a required shape by press molding, mold press molding, injection molding or the like, and a skin integrally adhered to the surface of the core 21 by vacuum molding or the like. The core material 21 is made of a composite resin material in which a filler such as wood powder or talc is mixed into a polypropylene resin. The skin material 22 is a foamed PVC sheet, a polyethylene foam or the like on the back surface of the PVC sheet. Is preferred from the standpoint of decorativeness and cushioning.

In the present embodiment, a cloth having a different texture and color from the skin material 22 of the door trim body 20 is used for the decorative sheet 30.

The door trim main body 20 is provided with a wood grain groove 23 along the lower edge of the decorative sheet 30. The lower edge terminal 30a of the decorative sheet 30 is press-fitted into the wood grain groove 23. The terminal processing of the decoration sheet 30 is performed.

The features of the present invention reside in a crimping method and a crimping device for crimping the decorative sheet 30 to the door trim main body 20.

First, an embodiment of the crimping apparatus according to the present invention will be described with reference to FIG.

The crimping apparatus according to the present invention includes a lower crimping die 40 for setting the door trim main body 20 and an upper base 50 which is located above the lower crimping die 40 and is configured to be vertically movable.
The upper die 50 is attached to the upper base 50 via the air cylinder 60, and is used for crimping and fixing the decorative sheet 30 to the door trim main body 20. And a wood grain bar 80 fixed to the upper base 50.

The upper base 50 is provided with an elevating cylinder 51 such as a hydraulic cylinder, which can be moved up and down by a press stroke dimension of the elevating cylinder 51. An upper mold 70 is mounted, and air is introduced into or removed from the air cylinder 60, so that a crimping upper mold 70 is provided.
Is configured to perform an integral operation with the upper base 50 or to absorb a press pressure of the upper base 50 by the air cylinder 60 by the air cylinder 60 so that only a small press pressure is applied to the upper die 70 for crimping.

As described above, the crimping device according to the present invention uses the conventional upper crimping die 70 on the upper base 50 via a spring.
However, by arranging the air cylinder 60 in place of this spring, the following special effects can be expected.

That is, the decorative sheet 30 is crimped to the door trim body 20 using the crimping device shown in FIG.
The graining step of press-fitting into the inside will be described in detail with reference to FIGS.

First, as shown in FIG.
Set the door trim body 20 on the mold surface of
An adhesive is applied to the waist portion of the door trim body 20, and the decorative sheet 30 is set thereon. At this time, the upper base 50 connected to the crimping upper mold 70 is at the upper position.

When the setting of the door trim main body 20 and the decorative sheet 30 in the crimping device is completed, air is introduced into the air cylinder 60 and attached to the piston rod 61 of the air cylinder 60 as shown in FIG. The crimping upper mold 70 is lowered, and the crimping upper mold 70 is moved to the decorative sheet 30.
Descend to the position directly above.

Then, as shown in FIG. 5, the lifting cylinder 51 is actuated, the upper base 50 is lowered, and the upper and lower dies 40, 70 are tightened by the engagement pressure so that the door trim main body 2 is pressed.
The decorative sheet 30 is firmly pressure-bonded to the 0 waist portion.

At this time, since the pressing pressure is not absorbed by the spring as in the prior art, the pressing pressure of the raising / lowering cylinder 51 is directly applied to the decorative sheet 30 from the upper die 70 for pressure bonding. Is small,
Pressing pressure 200g / cm ² required for crimping of decorative sheet 30
Can be secured well.

Next, when the pressure bonding step is completed, as shown in FIG. 6, the air in the air cylinder 60 is eliminated, so that the lowering of the upper base 50 can be continued by using the air cylinder 60 as a buffer mechanism. For example, with the crimping upper mold 70 stopped, only the graining bar 80 is lowered, and the decorative sheet 3 is inserted into the graining groove 23 of the door trim body 20.
The lower edge terminal 30a is press-fitted to perform terminal processing.

At this time, by using the air cylinder 60 as a buffering mechanism, the wood grain bar 80 alone can be operated even if the press pressure of the lifting cylinder 51 is set low. Since the pressure does not become abnormally large, even if an easily stretchable material such as a PVC sheet is used for the decorative sheet 30, the decorative sheet 3
The lower edge terminal 30a does not extend completely, and the appearance does not deteriorate.

If the air in the air cylinder 60 is removed, the process shifts from the press-bonding process to the graining process. By arbitrarily adjusting the timing of removing the air from the air cylinder 60, the time for the crimping process and the graining process are reduced. Can be adjusted at any time.

Finally, as shown in FIG.
It is sufficient to introduce air into the cylinder 0, operate the elevating cylinder 51, raise the upper base 50 to the uppermost position, and then take out the product on the crimping lower mold 40 that has undergone the crimping step and the graining step.

As described above, in the crimping device according to the present invention, by using the air cylinder 60 instead of the conventional spring, the press pressure of the lifting / lowering cylinder 51 can be set low, and the device can be made compact. By adjusting the air cylinder arbitrarily, the timing of the wood graining process can be freely set, which has high practical value.

[0039]

As described above, the present invention has the following special functions and effects.

(1) The crimping device according to the present invention uses an air cylinder instead of a conventional spring, and introduces air into the air cylinder. Since the crimping force and the graining pressure can be guaranteed, there is an effect that the size of the press device can be reduced and the equipment can be saved.

(2) According to the decorative sheet crimping method of the present invention, the pressing force of the wood grain bar can be set small, so that even if a relatively stretchable resin sheet such as a PVC sheet is used, the decorative sheet can be formed in the wood grain step. The terminal is not stretched and can be accommodated in the groove for wood grain, so that there is an effect that the appearance is not deteriorated.

(3) According to the decorative sheet crimping method according to the present invention, the crimping time and the wood graining time can be arbitrarily adjusted by operating the timing of removing air from the air cylinder. In consideration of the above, the time spent in the crimping step and the time spent in the wood graining step can be arbitrarily allocated, which has an effect that a detailed response can be made.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a configuration of an automobile door trim manufactured by a method of the present invention.

FIG. 2 is a cross-sectional view showing a configuration of an embodiment of a decorative sheet crimping apparatus according to the present invention.

FIG. 3 is a cross-sectional view showing one step of the method of the present invention and showing a step of setting a material.

FIG. 4 is a cross-sectional view showing one step of the method of the present invention and showing a state in which air is introduced into an air cylinder.

FIG. 5 is a cross-sectional view showing one step of the method of the present invention and showing a pressure bonding step.

FIG. 6 is a cross-sectional view showing one step of the method of the present invention and showing a grain cutting step.

FIG. 7 is a cross-sectional view showing a mold opened state after completion of the graining step.

FIG. 8 is a sectional view showing a configuration of a conventional automobile door trim.

FIG. 9 is a cross-sectional view showing a configuration of a conventional decorative sheet crimping apparatus.

FIG. 10 is a cross-sectional view showing a pressure bonding step of a decorative sheet in a conventional method.

FIG. 11 is a cross-sectional view showing a step of embedding a terminal wood of a decorative sheet in a conventional method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Automobile door trim 20 Door trim main body 21 Core material 22 Skin material 23 Groove part 30 Decorative sheet 30a Lower edge terminal 40 Lower part for crimping 50 Upper base 51 Cylinder for raising and lowering 60 Air cylinder 70 Upper part for crimping 80 Bar for graining

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masayuki Kato 2370-2 Obuchi, Fuji City, Shizuoka Prefecture Inside Izumi Sangyo Co., Ltd. (56) References JP-A-3-45331 (JP, A) JP-A-4-308732 (JP, A) JP-A-5-96625 (JP, A) JP-A-1-101833 (JP, U) JP-A-1-117299 (JP, U) (58) Fields investigated (Int. Cl. ⁶⁾ B29C 65/00-65/54 B29C 65 / 70,65 / 78 B68G 7/02 B60R 13/02

Claims (2)

(57) [Claims] A decorative sheet (30) is crimped to a predetermined portion of the surface of a trim body (20), and the decorative sheet (3) is pressed.
In the method of crimping a decorative sheet in an automobile interior part in which the terminal of (0) is press-fitted into a wood grain groove (23) provided in the trim body (20), the operation of the lifting cylinder (51) causes the upper base (5) to move.
0) and the upper crimping die (70) is lowered, and the upper and lower crimping dies (40, 70) are clamped to form a trim body (2).
0) A step of crimping the decorative sheet (30) to a predetermined position on the surface, and removing air in an air cylinder (60) installed between the upper mold for crimping (70) and the upper base (50). By lowering the upper base (50), the terminal of the decorative sheet (30) is pressed into the wood grain groove (23) of the trim body (20) with the wood grain bar (80) connected to the upper base (50). A method for crimping a decorative sheet on an automobile interior part, comprising the steps of: 2. A decorative sheet (3) is crimped to a predetermined position on the surface of the trim body (20), and the decorative sheet (3) is pressed.
A crimping device for a decorative sheet in an automobile interior part in which the terminal of 0) is press-fitted into a groove portion (23) provided in the trim main body (20). The crimping device is for crimping the trim main body (20). The lower mold (40) and the upper base (50) that can be moved up and down by the elevating cylinder (51) are installed via an air cylinder (60), and the decorative sheet (30) is placed at a predetermined position on the surface of the trim body (20). The air cylinder comprises a crimping upper mold (70) for crimping, and a wood grain bar (80) arranged along an edge of the crimping upper mold (70) and connected to the upper base (50). (60) introduction of air into the
An apparatus for crimping a decorative sheet in an automobile interior part, wherein a pressing force of an upper mold for crimping (70) is varied by an elimination operation.