JPH04341823A - Pressure contacting method and pressure contacting device of decorative sheet in trim parts for automobile - Google Patents

Abstract

PURPOSE:To provide a pressure contacting method and pressure contacting device where creases and slackening are not generated on a decorative sheet and a positional deviation can be prevented reliably, in a pressure contacting method and pressure contacting device pressure-contacting a decorative sheet precut into a desired external form to a trim main body. CONSTITUTION:This is a pressure contacting method and pressure contacting device performing the second pressure contacting process by fitting clamping between a pressure contacting top force 20 and a stationary mold 32 of a pressure contacting bottom force 30 while applying tension to a decorative sheet 12 during a period until the second pressure contacting process is attained along with application of high press pressure in the first pressure contacting process to the decorative sheet 12 by providing locking mechanisms 35, 36 to a movable mold 31 in the first pressure contacting process by fitting clamping between the movable mold 31 of the pressure contacting bottom force 30 and the pressure contacting top force 20.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for crimping decorative sheets for interior parts of automobiles such as door trims.

0002

[Prior Art] Recently, attempts have been made to improve the interior comfort of automobiles by upgrading the materials of interior parts such as automobile door trims, or by attaching decorative sheets such as cloth to appropriate locations on the surface of door trims. It is being

FIG. 8 shows an outline of the structure of an automobile door trim.
A door trim body 3 formed by integrally bonding a skin material 2 to the surface of a core material 1 molded into a desired shape, and a cloth etc. that is attached to the surface of this door trim body 3 in order to further impart decorativeness to appropriate parts of the surface. It is composed of a decorative sheet 4.

[0004]The method of attaching the decorative sheet 4 to the door trim body 3 is as shown in FIG. A decorative sheet 4 trim-cut is set in a positioned state by a guide member 7.

At this time, the lower crimping mold 6 includes a movable mold 6a having a curved surface close to a flat surface so that the decorative sheet 4 can easily follow the curved shape of the door trim main body 3, and a movable mold 6a which corresponds to the waist portion of the door trim. The movable mold 6a is attached to the base 6c via a spring mechanism 6d, and the fixed mold 6b is attached to the base 6c with a buffer member 6e for preventing overstroke. has been fixed through.

[0006] A bar 8 for wood graining is fixed to the base 6c between the lower mold 6 for crimping and the guide member 7.

[0007] Once the work of setting the door trim body 3 and decorative sheet 4 on the upper and lower crimping molds 5 and 6 is completed,
As shown in FIG. 10, the upper crimping die 5 descends, and the upper crimping die 5 and the movable die 6a of the lower crimping die 6 first engage with each other. Then, the decorative sheet 4 is crimped and integrated with the center portion of the door trim body 3 by the engagement and compression of the upper crimping mold 5 and the movable mold 6a. This is the first crimping step.

Further, the upper mold 5 for crimping is lowered, and the movable mold 6a is also lowered together with the upper mold 5 due to the elastic action of the spring means 6d, as shown in FIG. and the fixed mold 6b are engaged with each other, and the decorative sheet 4 is crimped along the waist portion of the door trim body 3. At this time, the guide member 7 is lowered downward by the spring means 7a.

Simultaneously with this second crimping process, the peripheral end 4a of the decorative sheet 4 is press-fitted into the wood graining groove 3a provided in the door trim body 3 by the wood graining bar 8, and the so-called wood graining process is performed. It is done.

0010

As described above, in the conventional method for crimping the decorative sheet 4, the lower crimping die 6 is divided into the movable die 6a and the fixed die 6b so as to correspond to the curved shape of the trim body 3. The decorative sheet 4 is divided into three parts to avoid excessive tension being applied to the decorative sheet 4, and the third part of the lower crimping mold 6 is
Guide members 7 are installed along the sides to accurately position the decorative sheet 4.

However, in the conventional crimping method, as shown in FIG.
Since sufficient surface pressure cannot be secured between the mold 6a and the movable mold 6a,
Even if the decorative sheet 4 is accurately positioned along the guide member 7, it has been pointed out that there is a problem in that the decorative sheet 4 is misaligned during this first crimping step.

Furthermore, since the decorative sheet 4 that is crimped to the waist portion of the door trim body 3 is in a free state and is not configured to apply tension, wrinkles and sag easily occur in the decorative sheet 4, and as shown in FIG. At the same time, it has been pointed out that the dividing line is transferred onto the product surface along the dividing line between the movable mold 6a and the fixed mold 6b, resulting in poor appearance of the product surface.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a crimping method and a crimping device for crimping a decorative sheet to a trim body by cutting the trim into a desired external shape in advance. To crimp a decorative sheet that can be accurately crimped to a predetermined location on the surface of a trim body without causing defects such as wrinkles or peeling on the complex curved shape of the trim body and without positional deviation even when using a decorative sheet that has been An object of the present invention is to provide a method and a crimping device.

[0014]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a trim body formed into a desired curved shape and a decorative sheet attached to a predetermined location on the surface side of the trim body. In addition to composing interior parts for
In the method for crimping a decorative sheet for an automobile interior part in which the decorative sheet is crimped onto a curved surface of a trim body, the decorative sheet trim-cut into a desired external shape is arranged along at least two sides of the periphery of the lower die for crimping. By positioning the decorative sheet along the lower crimping mold and clamping the edge of the decorative sheet to a movable clamp device installed along one side of the lower crimping mold, the decorative sheet is moved to the lower crimping mold. The upper crimping die with the trim body set therein is lowered relative to the lower crimping die, and the locking mechanism of the lower crimping die engages the movable die in the locked state with the upper crimping die. , a first crimping step of crimping the decorative sheet to the trim body, and then releasing the locking mechanism of the movable mold and lowering the crimping upper mold and the movable mold together;
A second crimping step of crimping the decorative sheet against the trim body by engaging the fixed molds of the upper crimping mold and the lower crimping mold while applying tension to the decorative sheet using a clamp device. Features.

Furthermore, the crimping device used in the present invention comprises a crimping upper mold that can be raised and lowered to set the door trim body, a movable mold and a fixed mold, which engage with the crimping upper mold to attach the decorative sheet. a lower crimping mold that is crimped to the trim body; a locking mechanism that locks the movable mold in an upper position; a guide member that is disposed along at least two sides around the lower crimping mold and that positions the decorative sheet; It is characterized by comprising a damper-equipped clamp device that is provided on one side of the lower mold for crimping and applies tension during the second crimping process of the decorative sheet.

[0016]

[Operation] As is clear from the above configuration, in the first crimping process, the movable mold engages with the upper mold for crimping and performs pressure tightening while being locked in the upper position. It becomes possible to apply press pressure, thereby reliably preventing displacement of the decorative sheet.

Furthermore, the movable locking mechanism is released,
The side edge end of the decorative sheet is held by a movable clamp device until the movable mold and the crimping upper mold begin to descend further and the engagement between the crimping upper mold and the fixed mold is completed,
Since this clamping device is equipped with a damper or other buffer mechanism, the decorative sheet can be crimped against the trim body between the upper mold for crimping and the fixed mold by applying appropriate tension to the decorative sheet. Wrinkles and sagging do not occur, and the dividing line between the fixed mold and the movable mold is not transferred to the product surface.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the decorative sheet crimping method and crimping apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

FIGS. 1 and 2 are a front view and a sectional view showing an automobile door trim manufactured by applying the method of the present invention, and FIG.
1 is a cross-sectional view showing the structure of a decorative sheet crimping apparatus according to the present invention, and FIGS. 4 to 7 are cross-sectional views showing each step of the method of the present invention.

In FIGS. 1 and 2, an automobile door trim 10 includes a door trim body 11 and a door trim body 1.
1, and a decorative sheet 12 such as a cloth attached to a predetermined location on the front side of the sheet.

More specifically, the door trim body 11
consists of a core material 13 made of wood fiberboard or the like that is thermo-pressed into a desired shape, and a skin material 14 that is integrally attached to the surface of the core material 13 by vacuum forming or the like. A foam layer 15 made of polypropylene foam, polyethylene foam, etc. and a skin sheet 16 made of ABS-mixed PVC sheet etc.
The back is laminated.

The door trim main body 11 has grooves 17 formed along the side edges and the lower edge of the decorative sheet 12 into which the peripheral edges 12a are press-fitted. It is formed simultaneously during press molding.

On the other hand, the decorative sheet 12 may be appropriately selected from cloth such as velvet, jersey, tricot, moquette, etc., and the peripheral end 12a of this decorative sheet 12 is
As described above, by being press-fitted into the woodgrain groove 17 and having the end treated, it has an excellent appearance design.

[0024] Note that a thermoplastic composite resin plate or the like may be used as the core material 13. In this case, the sheet-like material is preheated and softened, and then press-molded using a cold press mold of the desired shape. By this, the core material 13 having a desired shape
is obtained.

By the way, the present invention relates to a method of crimping the decorative sheet 12 to the door trim body 11, but before explaining the crimping method, the configuration of the crimping device used therein will be explained based on FIG. do.

This crimping device includes an upper crimping mold 20 for setting the door trim body 11, a lower crimping mold 30 for setting the decorative sheet 12, and a crimping mold 30 for setting the decorative sheet 12 on the outer periphery along three sides of the lower crimping mold 30. installed, the peripheral end 1 of the decorative sheet 12
2a is press-fitted into the wood-grain groove 17 of the door trim body 11, and the wood-grain bar 4
A guide member 50 is installed along the outer circumference of the decorative sheet 12 for positioning the decorative sheet 12, and a guide member 50 is installed along the remaining side of the lower crimping mold 30 to hold the edge portion of the decorative sheet 12 on the door waist side. It is generally composed of a movable clamping device 60.

More specifically, the upper mold 20 for crimping is attached to an upper base 21, and this upper base 21 is configured to be movable up and down by a hydraulic or pneumatic drive cylinder 22.

[0028] Furthermore, the lower mold 30 for crimping is attached to the trim body 11.
In order to press and integrate the decorative sheet 12 while following the complicated curved shape of the door trim body 11, the movable mold 31 is composed of a movable mold 31 and a fixed mold 32. The fixed mold 32 has a curved surface corresponding to the door waist portion of the door trim body 11.

The movable die 31 is configured to withstand sufficient press pressure with respect to the base 33 through a locking mechanism at the uppermost position.

That is, the support member 34 connected to the lower surface of the movable mold 31 is in contact with a stopper 35, and the stopper 35 is configured to be movable forward and backward by a cylinder 36, and a spring provided on the lower surface of the movable mold 31 Mechanism 37
Therefore, when the engagement between the stopper 35 and the support member 34 is released, the movable mold 31 can move in the direction of the arrow against the spring force of the spring 37.

Further, the fixed mold 32 and the wood graining bar 40 are each fixed to the base 33, but the guide member 50 is fixed to the base 33 via the spring means 52, and the guide member 50 is fixed to the base 33 through the spring means 52. As the upper crimping die 20 descends, it can be pressed downward against the spring force of the spring mechanism 37.

Furthermore, the movable clamp device 60 includes a damper 61 (a hydraulic damper is used in this embodiment) that comes into contact with the fixed mold 32, and a slide mechanism 62 relative to the base 33 is incorporated. , functions as a movable clamp device 60.

Next, a method for crimping the decorative sheet 12 to the door trim body 11 using the crimping device shown in FIG. 3 will be explained based on FIGS. 4 to 7.

First, as shown in FIG.
The door trim main body 11 is set along the mold surface, and the three peripheral edges of the decorative sheet 12 are placed against the guide member 50 to accurately set it on the upper surface of the lower mold 30 for crimping. One side is held by a movable clamp device 60.

At this time, the portion of the door trim body 11 where the decorative sheet 12 is pressed is coated with an adhesive in advance.

In this way, once the process of setting the door trim body 11 and the decorative sheet 12 is completed, the driving cylinder 2
2 is operated, the upper crimping die 20 is lowered, and the upper crimping die 20 and the movable die 31 are engaged with each other, as shown in FIG.

At this time, the movable mold 31 is in a locked state with the support member 34 located on the top surface of the stopper 35, and in this embodiment, it has sufficient strength to withstand large press pressure. In the first crimping process, the decorative sheet 12 positioned at an accurate position is reliably positioned and crimped and integrated with the trim body 11.

After the first crimping step is completed, the cylinder 36 is actuated and the stopper 35 is moved back in the direction of the arrow, and the movable die 31 is now able to descend downward, and the spring of the spring mechanism 37 is released. The upper crimping die 20 and the movable die 31 begin to move down together against the force (see FIG. 6).

At this time, the guide member 50 is connected to the upper die 2 for crimping.
0 and descends against the spring force of the spring means 52, and the clamp device 60 holding the peripheral portion of the decorative sheet 12 pulls the decorative sheet 12 toward the center, but the damper Due to the cushioning effect of 61, appropriate tension can always be applied to the decorative sheet 12.

Then, as shown in FIG. 7, the upper mold 2 for crimping
0 and the fixed mold 32 are engaged and tightened, the door trim body 1
The decorative sheet 12 is pasted along the waist portion of the door trim body 1 with an appropriate tension applied by a movable clamp device 60, and the decorative sheet 1
2 crimping is completed.

In the same step as this second crimping step, the tip of the bar 40 for wood graining fixed to the base 33 is moved relatively to the mold of the movable mold 31 by the downward movement of the movable mold 31 of the lower mold 30 for crimping. The end portion of the bar 40 for wood graining is located above the surface of the decorative sheet 12.
2a is press-fitted into the wood-graining groove 17 of the door trim body 11, a so-called wood-graining operation.

When the process of crimping the decorative sheet 12 to the trim body 11 and the graining process are completed, the upper mold 20 for crimping is raised by the operation of the driving cylinder 22, and the movable mold 31 is also moved by the spring mechanism 3.
7 returns to the uppermost position by the spring force, and the stopper 35 is positioned below the support member 34 by the action of the cylinder 36, and becomes locked, and the guide member 50 also returns to the uppermost position by the spring force of the spring 52. , Mass production is possible if the above-mentioned steps are performed continuously.

[0043]

[Effects of the Invention] As explained above, the present invention has the following special effects.

(1) Since the movable lower crimping die has a locking mechanism so that it is locked in the first crimping process, the upper crimping die and the lower crimping die are locked in the first crimping process. It is possible to apply high press pressure between the movable mold and position the decorative sheet pre-cut into the desired shape to the guide member, ensuring that misalignment can be prevented, allowing for highly accurate positioning and crimping. This can be expected to have the effect of significantly reducing misalignment.

(2) By holding the decorative sheet with a damper-equipped clamp device between the first crimping process and the second crimping process, the decorative sheet is crimped onto the trim body while applying appropriate tension to the decorative sheet. As a result, it is possible to reliably prevent wrinkles and sagging from occurring on the decorative sheet, and there is no longer a dividing line between the movable type and the fixed type that occurs on the product surface, which previously occurred, and there is no wrinkles or sagging on the product surface. Alternatively, there is an effect that no unnecessary lines are formed and a beautiful product appearance can be obtained.

[Brief explanation of drawings]

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

FIG. 2 is a sectional view taken along line II-II in FIG. 1;

FIG. 3 is a sectional view showing the configuration of a decorative sheet crimping device according to the present invention.

FIG. 4 is a cross-sectional view showing one step of the method of the present invention, illustrating a step of setting materials into a crimping device.

FIG. 5 is a cross-sectional view showing a state of engagement between the movable dies of the upper crimping die and the lower crimping die, showing one step of the method of the present invention.

FIG. 6 is a cross-sectional view showing one step of the method of the present invention, after the first crimping step and in the middle of the second crimping step.

FIG. 7 is a cross-sectional view showing one step of the method of the present invention, showing a woodgraining step and an engaged state of the crimping upper mold and the fixed mold.

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

FIG. 9 is a sectional view showing a conventional decorative sheet crimping device.

FIG. 10 shows a conventional crimping method for decorative sheets.
FIG. 3 is a cross-sectional view showing a first crimping step.

FIG. 11 shows a conventional crimping method for decorative sheets.
FIG. 3 is a cross-sectional view showing a second crimping step.

FIG. 12 is a cross-sectional view of a door trim showing the drawbacks of the conventional decorative sheet crimping method.

[Explanation of symbols]

10 Automotive door trim 11 Door trim body 12 Decorative sheet 20 Upper mold for crimping 30 Lower mold for crimping 31 Movable type 32 Fixed type 33 Base 34 Support member 35 Stopper 36 Cylinder 37 Spring mechanism 40　Kimekomi bar 50 Guide member 52 Spring mechanism 60 Clamp device 61 Damper device 62 Slide mechanism

Claims (2)

[Claims] Claim 1: A trim body (
11) and a decorative sheet (12) attached to a predetermined location on the front side of the trim body (11), and an automobile interior part (10) is constituted by the decorative sheet (12).
) to a trim body (11), a decorative sheet (12) trim-cut into a desired external shape is attached to a lower die (3) for crimping.
The movable clamp device (60) is positioned along the guide member (50) disposed along at least two sides of the periphery of the crimping lower die (30) ) by clamping and holding the edge of the decorative sheet (12) in the lower mold for crimping (30), and the upper mold for crimping (30) in which the trim body (11) is set. 20) relative to the lower crimping die (30), and locking mechanism (35) of the lower crimping die (30)
, 36), a first crimping step of engaging the movable die (31) in the locked state with the crimping upper die (20) and crimping the decorative sheet (12) to the trim body (11);
After that, the locking mechanism (35, 36) of the movable type (31) is
), the upper crimping mold (20) and the movable mold (31) are lowered together, and while applying tension to the decorative sheet (12) with the clamp device (60), the upper crimping mold (2
0) and the fixed mold (32) of the lower crimping mold (30), and a second crimping step of crimping the decorative sheet (12) to the trim body (11). A method for crimping decorative sheets for automotive interior parts. Claim 2: A crimping upper mold (20) that can be raised and lowered to set the door trim body (11), a movable mold (31), and a fixed mold (32), which engage with the crimping upper mold (20). do,
A lower crimping die (30) for crimping the decorative sheet (12) to the trim body (11), a locking mechanism (35, 36) for locking the movable die (31) in the upper position, and a lower crimping die (30) for crimping the decorative sheet (12) to the trim body (11).
) for positioning the decorative sheet (12);
A decorative sheet comprising a clamp device (60) with a damper (63) provided along one side of a lower mold for crimping (30) and applying tension in the second crimping process of the decorative sheet (12). crimping device.