JP5071729B2 - Manufacturing method for interior materials - Google Patents

Description

  The present invention relates to a vehicle interior material and its manufacture.

  Conventionally, interior materials in which a skin material (for example, leather material) and a soft material (for example, urethane or other cushion materials) are bonded together are widely used especially for instrument panels (instrument panels) for high-class vehicles. In the production of such interior materials, the problem of wrinkles due to internal stress generated when the planar interior material is matched with the shape of the instrument panel base material having a curved surface shape (three-dimensional shape) is a problem. It was. In order to solve this problem, for example, prior to the bonding of the skin material and the soft material in the production of the interior material, the internal material is produced by bonding the soft material with the skin material matched to the above shape to produce the internal stress. A method (paragraph 0006) for reducing wrinkles and preventing wrinkles has been proposed (Patent Document 1).

  On the other hand, since an instrument panel for a vehicle generally includes an airbag on the passenger seat side, a predetermined cut (also referred to as a burst line or a tear line) may be formed to facilitate the operation thereof. It is desired. As a method for forming such a cut, for example, in a laminate of a base material and an interior material, a pressure is applied to the base material to form a cut while compressing the foam layer of the interior material in the stacking direction, thereby forming the cut. A technique for suppressing the occurrence of burrs has also been proposed (Patent Document 2).

  However, in the conventional manufacturing method, the method for effectively forming the cut has not been sufficiently studied.

JP 2007-223368 A JP 2004-82865 A

  The present invention has been made to solve at least a part of the above-described conventional problems, and an object thereof is to provide a technique for effectively forming a cut in an interior material for a vehicle.

Means and effects for solving the problem

[Application Example 1]
A method for manufacturing an interior material for a vehicle having an airbag grid,
A molding step of molding a skin material according to the surface shape of the base material the interior material has,
An adhering step of adhering a soft material to the molded skin material;
An air bag grid forming step for forming a burst line, which is a cut forming the air bag grid, in the skin material and the soft material at a time while maintaining the molding state;
A method for manufacturing an interior material comprising:

  In the manufacturing method of Application Example 1, the skin material is molded, and in the state in which the soft material is bonded to the molded skin material, the burst lines that are the cuts constituting the airbag grid are formed on the skin material and the soft material at a time. Since it is formed, the following two effects can be achieved. The first effect is that it is possible to simplify the manufacturing process by eliminating the need for alignment of the burst line at the time of bonding as compared to the method of bonding after forming a burst line on the skin material and the soft material. It is an effect. The second effect is the formation of notches due to internal strain generated during the formation of the laminate, compared to the method of forming the burst line after the laminate is formed after the skin material and the soft material are bonded together. It is an effect that the inhibition of the above can be suppressed and the formation of an accurate burst line can be facilitated.

[Application Example 2]
A manufacturing method of application example 1,
The airbag grid forming step includes a step of sucking the skin material on both sides of the burst line,
The forming step includes a step of forming such that a specific region corresponding to the burst line protrudes in a direction of the skin material from a region for sucking the skin material on both sides of the burst line.

  In the configuration of the application example 2, since the specific region corresponding to the burst line is formed so as to protrude in the direction of the skin material rather than the region for sucking the skin material, the specific region corresponding to the burst line at the time of suction Can be shaped to have a tensile strain. In this way, the tensile strain generated by the shape characteristics of the mold can reduce the friction between the soft material and the blade during cutting, and the width of the formed cut can be expanded to increase the depth of cut. It can also serve to facilitate confirmation.

[Application Example 3]
It is a manufacturing method of application example 2,
The manufacturing method in which the specific region is formed so as to protrude from the surface shape of the base material and protrude in the direction of the skin material.

  In the manufacturing method of the application example 3, since the specific region is formed so as to protrude from the surface shape of the base material and protrude in the direction of the skin material, the interior material is peeled off from the mold and deformed in the direction of the mold. When a predetermined curved surface shape is formed, tensile stress is generated on the surface of the skin material, that is, on the outer surface of the interior material. By this tensile stress, wrinkles on the outer surface of the interior material are suppressed, and the appearance quality can be improved.

[Application Example 4]
A manufacturing method of Application Example 2 or 3,
The manufacturing method in which the specific region is formed so as to be smoothly continuous with a region for sucking the skin material on both sides of the burst line.

  In the manufacturing method of Application Example 4, since the specific region is formed so as to be smoothly continuous with the region for sucking the skin material on both sides of the burst line, it is possible to reduce the occurrence of scratches and wrinkles on the skin material. .

[Application Example 5]
A manufacturing method according to any one of Application Examples 2 to 4, further comprising:
A manufacturing method provided with the test | inspection process which measures the depth of the said cutting using a laser beam, maintaining the said shaping | molding state.

  In the manufacturing method of Application Example 5, the depth of cut is measured using a laser beam while maintaining the molding state, so that the inspection process can be easily performed while being placed on the manufacturing apparatus.

[Application Example 6]
A manufacturing apparatus for manufacturing an interior material for a vehicle having an airbag grid,
A molding die for molding into a shape substantially matching the surface shape of the base material the interior material has;
The said shaping | molding die is a manufacturing apparatus which has the suction hole which attracts | sucks the said skin material on the both sides of the burst line which is the notch which comprises the said air bag grid.

Next, embodiments of the present invention will be described in the following order based on examples.
A. Configuration of vehicle interior material of embodiment:
B. Manufacturing method in the first embodiment:
C. Manufacturing method in the second embodiment:
D. Variations:

A. Configuration of vehicle interior material of embodiment:
FIG. 1 is a perspective view showing a vehicle instrument panel 100 (also referred to as an instrument panel 100 in this specification) as a vehicle interior material of the present embodiment. Since the instrument panel 100 is arranged on the front side of the occupant, the airbag 200 is mounted on the back side of the instrument panel 100 on the passenger seat side in order to absorb the impact of the occupant during a vehicle collision.

  When the vehicle receives an impact, the airbag 200 opens the airbag grid 122 (airbag lid) of the instrument panel 100, enters the passenger compartment side through the opening, and the airbag 200 is inflated in the passenger cabin. In this way, the airbag 200 inflated in the passenger compartment protects the occupant. The air grid 122 is configured as a portion surrounded by a groove 121 (also referred to as a burst line or a tear line) formed on the back surface of the instrument panel 100 so as to easily tear the instrument panel 100.

  FIG. 2 is a cross-sectional view showing a stacked state of the instrument panel 100 of the present embodiment. In this embodiment, the instrument panel 100 is composed of a base panel 10 and a cover member 20 attached to the surface thereof. The base panel 10 can be configured as a rigid body of synthetic resin having a three-dimensional shape, for example. The cover member 20 can be configured, for example, as a laminate of a genuine leather skin material 12 having flexibility and a cushion material 14 having elasticity.

  As the skin material 12, for example, genuine leather, synthetic leather, polyolefin-based thermoplastic resin (TPO resin), soft vinyl chloride resin (PVC resin), thermoplastic polyurethane (TPU resin), or the like can be used. As the cushion material 14, for example, a foamed resin such as foamed polyurethane or foamed polyolefin can be used. As the base panel 10, for example, polypropylene (PP) resin alone, or PP resin containing filler reinforced with talc, mica or glass, PP resin, modified polyphenylene oxide (PPO) resin, acrylonitrile butadiene styrene (ABS) Resin or the like can be used.

  FIG. 3 is an exploded perspective view showing the configuration of the groove 121 of the instrument panel 100 in the present embodiment. Since the perforation 121p is formed in the base material panel 10, the three-dimensional shape of the base material panel 10 can be maintained, and the air bag 200 is smoothly cut when the airbag 200 is operated. Since the cushion material 14 is cut at the cut surface 121c at a position communicating with the perforations 121p of the base panel 10, it can be smoothly separated when the airbag 200 is operated. Since the skin material 12 is notched as a notch 121n, the skin material 12 is torn smoothly during operation of the airbag 200.

  However, the skin material 12 is not completely cut like the cushion material 14, but a cut (notch 121 n) is formed halfway, so that the skin material 12 is continuous on the cabin side. become. Thereby, since the groove part 121 is hardly visible from the surface of the instrument panel 100 (invisible), the aesthetic appearance of the instrument panel 100 can be maintained. In the present specification, the communicating portion of the notch 121n and the cut surface 121c is formed at a time in each embodiment described later, and is referred to as a cover member notch 21n.

  In the cover member 20, the portion surrounded by the cover member notch 21 n corresponds to the “airbag grid” in the claims, and constitutes the airbag grid 122 together with the perforations 121 p of the base panel 10.

B. Manufacturing method in the first embodiment:
FIG. 4 is a flowchart showing a method for manufacturing the instrument panel 100 in the first embodiment of the present invention. In this manufacturing method, the cover member 20 that matches the three-dimensional shape of the base panel 10 is manufactured with respect to the base panel 10 that has been manufactured in advance (the perforation 121p has been formed). It is completed by pasting together. Since this embodiment has a feature in the manufacturing method of the cover member 20, the manufacturing method will be described mainly.

  In step S100, a molding machine 500 used for manufacturing the cover member 20 of the instrument panel 100 is prepared. The molding machine 500 is an apparatus for manufacturing the cover member 20 having a shape that matches the three-dimensional shape of the base panel 10 manufactured in advance.

  FIG. 5 is an explanatory view showing the molding machine 500 of the first embodiment and the support base 600 of the molding machine 500. FIG. 6 is an explanatory view showing a state in which the instrument panel 100 molded by the molding machine 500 of the first embodiment is rotated 180 degrees around the Y axis. The molding machine 500 includes five reversing molds 510s1, 510s2, 510s3, 510s1e, and 510s3e having a three-dimensional curved surface that matches the three-dimensional shape of the base panel 10. The two grab region inversion molds 510s1 and 510s1e are in charge of forming the grab region 101 (FIG. 6). The two inversion molds 510s3 and 510s3e for the meter hood region are in charge of forming the meter hood region 103 (FIG. 6). The center cluster reversal mold 510s2 is in charge of forming the center cluster region 102 (FIG. 6). The reversing mold in charge of forming the grab region 101 and the meter hood region 103 is configured to be separable in order to facilitate the separation of the cover member 20 after forming (FIG. 5).

  The five inversion types 510s1, 510s2, 510s3, 510s1e, and 510s3e are temperature-adjusted by flowing a fluid (for example, hot water) through a temperature-adjusting fluid channel (not shown) formed inside. This fluid is supplied to the five inversion types 510s1, 510s2, 510s3, 510s1e, and 510s3e from the outside through the temperature control inlet / outlet 540.

  FIG. 7 is an explanatory view showing a cross section BB (FIG. 5) of the molding machine 500 of the first embodiment. A cross section BB shows a cross section of the inversion type 510s1. As described above, the inversion type 510s1 has a three-dimensional curved surface having a shape that matches the three-dimensional shape of the base panel 10 in the grab region 101 (FIG. 6). A large number of suction holes 510h communicating with the vacuum box 520 having the cavity 520v are formed in the reversal mold 510s1. A suction hole 520p is connected to the cavity 520v, and suction of the cover member 20 in the numerous suction holes 510h can be realized according to suction from the outside. In the first embodiment, the molding and lamination of the cover member 20 are performed using the molding machine 500 having such a configuration. The suction hole 510h is not shown in FIG.

  FIG. 8 is a flowchart showing details of the molding / laminating step (step S200 in FIG. 4) of the instrument panel 100 in the first embodiment of the present invention. In step S210, a skin layer sewing process is executed. The skin layer sewing step is a step of manufacturing the skin material 12 by sewing a skin material of genuine leather, for example. Details of the post-processing for the skin layer sewing process and the sewing portion are disclosed in the published publication (Japanese Patent Laid-Open No. 2007-223368) of the application by the present applicant and constitute a part of the technical level of those skilled in the art at the time of filing this application. Therefore, detailed description is omitted.

  In step S220, a skin layer forming (suction) step is executed. As shown in FIG. 9, the skin layer forming process is performed on the surface of the reversing mold 510s1 so that the skin material 12 is brought close to the reversing mold 510s1 as shown in FIG. The skin material 12 is stretched along the line and sucked from the suction hole 520p in this state. By this process, the three-dimensional curved surface having a shape that matches the three-dimensional shape of the base panel 10 is fixed by the numerous suction holes 510h in a state where the skin material 12 has.

  In step S230, an adhesive application process is executed. For example, the adhesive application step is a step in which an adhesive is sprayed and applied to the surface of the skin material 12 adsorbed along the surface of the reversal mold 510s1 as shown in FIG. It is. Note that the application of the adhesive is not limited to the spraying method, and may be applied by brush (not shown) or the like, or is applied in advance to at least one of the skin material 12 and the cushion material 14 and a seal is pasted thereon. Anyway.

  In step S240, a cushioning agent adhesion step is executed. The cushioning agent bonding step is a step of affixing the cushioning material 14 to the skin material 12 to which the adhesive is applied and waiting for the adhesive to cure as necessary. In this way, when the molding / lamination process (step S200, FIG. 8) is completed, the process proceeds to step S300 (FIG. 4).

  In step S300, a cut forming process is performed. The notch forming step is a step of forming the cover member notch 21n (FIG. 3) in the groove 121 (also referred to as a burst line or a tear line) constituting the air bag grid 122. The groove portion 121 is configured by bonding the cover member 20 in which the cover member notch 21n is formed and the base panel 10 in which the perforations 121p are formed in advance and communicating with each other.

  FIG. 13 is an explanatory diagram showing an imaginary line representing the contour shape position 121ph where the cover member notch 21n is formed in the reversing mold 510s1 of the molding machine 500. FIG. FIG. 14 is a cross-sectional view showing a contour shape position 121ph where the cover member notch 21n is formed. In the first embodiment, the cover member notch 21n is formed in the skin material 12 and the cushion material 14 at a time by inserting the blade 710 into the contour shape position 121ph set at such a position. The operation of the blade 710 may be automatically controlled by numerical control, or may be manually performed by an operator (not shown). In the present embodiment, suction holes 510h are arranged on both sides of the burst line in order to fix the skin material 12 and the cushion material 14 at the cutting position.

  FIG. 15 is a cross-sectional view showing a state in which a cut (cover member notch 21 n) is formed by the blade 710. As can be seen from this figure, the blade 710 penetrates through the cushion material 14 to form a cut surface 121c (FIG. 3), and further reaches the skin material 12. In this embodiment, since the blade 710 is heated by heater heating, induction heating, or other methods, the notch 121n remains even after the blade 710 is separated, and the notch 121n can be inspected by laser light.

  However, as described above, the skin material 12 is not completely cut like the cushion material 14, but a cut (notch 121 n) is formed to the middle. It will be continuous. For this reason, the blade 710 is accurately inserted so that a preset amount of clearance CLR remains between the reversing mold 510s1 and the skin corresponding to the thickness corresponding to the clearance CLR and the elastic deformation (a minute amount) of the skin material 12 are provided. The material 12 will remain without being cut.

  Since the clearance CLR can be measured using non-contact physical behavior such as electromagnetic waves or ultrasonic waves, the operation of the blade 710 is automatically controlled by a feedback method using such measured values. May be. Alternatively, the clearance CLR can be grasped as a three-dimensional positional relationship as a known deterministic system. Therefore, even if the clearance CLR is operated by performing numerical control by numerically setting the three-dimensional positional relationship in advance. good. In such numerical control, it is preferable to calibrate the measuring device (not shown) that simulates the blade 710 by contacting the reversing die 510s before setting the skin material 12 on the reversing die 510s1.

  In this way, when the cut forming process (step S300) is completed, the process proceeds to step S400 (FIG. 4).

  In step S400, a cutting amount inspection process is executed. The cutting amount inspection step is a step of measuring the amount of cutting (cover member notch 21n) (for example, the depth of cutting and the remaining thickness). This measurement is performed using a laser distance measuring device 720. By this inspection process, the cut amount is confirmed, and it is ensured that the cover member notch 21n is torn and the airbag grid 122 (airbag lid) is smoothly opened with respect to the operation of the airbag 200. When quality assurance including such an inspection process is performed and the manufacture of the cover member 20 is completed, the process proceeds to step S500.

  In step S500, a base material layer bonding step is executed. The base material layer bonding step is a step of attaching the cover member 20 thus manufactured to the base material panel 10. In the base material layer bonding step, the base material panel 10 and the cover member 20 are three-dimensionally matched, and a perforation 121p formed in advance on the base material panel 10 and a cover member notch 21n formed in the cover member 20 are provided. After confirming that the alignment is performed so as to communicate with each other, an adhesive is applied and pasted.

  As described above, in the first embodiment, a series of manufacturing steps from molding to formation of cuts are performed in the reversing mold 510s having a three-dimensional surface that matches the three-dimensional shape of the base panel 10, so that the cover is covered. Manufacturing the cover member 20 having the member notch 21n can be a simple and highly accurate manufacturing process.

C. Manufacturing method in the second embodiment:
FIG. 17 is a flowchart showing a method for manufacturing the instrument panel 100a in the second embodiment of the present invention. The manufacturing method of the second embodiment is the same as that of the first embodiment in that the cover member notch 21na formed on the cover member 20a can be made smaller than the cover member notch 21n formed by the manufacturing method of the first embodiment. It is different from the manufacturing method.

  In this manufacturing method, a series of manufacturing steps from forming to forming a notch is performed in an inverted mold 510sa having a three-dimensional surface that does not necessarily match the three-dimensional shape of the substrate panel 10 (that is, having a free part). This is different from the manufacturing method of the first embodiment. Specifically, the manufacturing apparatus preparation process (step S100) and the notch formation process (step S300) are each changed from the manufacturing method of the first embodiment.

  FIG. 18 is an explanatory diagram showing a convex portion 121cv (a free portion) provided at a position corresponding to the position where the cover member notch 21n is formed in the reversing mold 510s1a of the molding machine 500a. FIG. 19 is a cross-sectional view showing a convex part 121cv in which a cover member notch 21n is formed. The convex portion 121cv has a shape provided to form a cut having a shape different from that of the first embodiment in the cut forming step (step S300a). The convex portion 121 cv protrudes toward the skin material 12 and has a shape (free shape) that is different from the curved surface shape (three-dimensional shape) of the base panel 10.

  FIG. 20 is a perspective view showing a positional relationship between the blade 710a and the reversal mold 510s1a in the vicinity of the convex portion 121cv. As can be seen from this figure, in the present embodiment, the blade 710a is disposed at a position where a cut is formed at the highest position (top) of the convex portion 121cv. Note that the top portion may be configured as a flat portion so as to allow a deviation in consideration of the existence of alignment tolerance between the blade 710a and the convex portion 121cv. However, the convex portion 121cv is preferably configured to have a cross-sectional shape that is continuously connected to the curved shape of the inversion type 510s1a, that is, a smooth shape. The friction between the reversal mold 510s1 and the skin material 12 when the skin material 12 is placed on the reversal mold 510s1 is reduced to suppress variation in the placement state in the vicinity of the burst line, This is because the occurrence of wrinkles can be reduced.

  FIG. 21 is a conceptual diagram showing a state in which the cover member notch 21na formed on the convex portion 121cv is opened by the blade 710a. In this conceptual diagram, the suction hole 510ha sucks the cover member 20 onto the reversing mold 510s1a through the cavity 520va by suction from the suction hole 520pa. As can be seen from this conceptual diagram, the cover member notch 21na is open even after the blade 710a is pulled out. This is due to internal strain when the skin material 12 and the cushion material 14 are arranged along the convex portion 121cv.

  FIG. 22 is an explanatory diagram showing the state of internal strain when the skin material 12 and the cushion material 14 are arranged along the convex portion 121cv. In the second embodiment of the present invention, the internal strain of the skin material 12 is generated when the skin material 12 is bent along the curved surface of the convex portion 121 cv when the skin material 12 is disposed along the convex portion 121 cv. To do. Specifically, it can be seen that this bending generates a tensile strain S12t on the outer peripheral side and a compressive strain S12c on the inner peripheral side.

  On the other hand, the cushion material 14 is generated when the cushion material 14 is bent along the outer peripheral surface of the skin material 12. Specifically, it can be seen that this bending generates a tensile strain S14t on the outer peripheral side and a compressive strain S14c on the inner peripheral side. However, since the cushion material 14 has a smaller curvature than the skin material 12, the size of the internal strains S14t and S14c of the cushion material 14 is smaller than the size of the internal strains S12t and S12c of the skin material 12. I understand.

  FIG. 23 is an explanatory diagram showing a state when the blade 710a starts to enter the surface (outer peripheral surface) of the cushion material 14. FIG. Since the tensile strain S14t is generated on the surface (outer peripheral surface) of the cushion material 14, the blade 710a enters smoothly, and the cuts spread on both sides to reduce the frictional force between the cushion material 14 and the blade 710a. can do.

  FIG. 24 is an explanatory view showing a state when the blade 710 a is put in the skin material 12. Since a tensile strain S12t is generated on the surface (outer peripheral surface) of the skin material 12, since the cut is opened on both sides by this strain, the blade 710a can be smoothly inserted.

  FIG. 25 shows a state where the cover member notch 21na is opened even after the blade 710a is pulled out. This is due to internal strain when the skin material 12 and the cushion material 14 are arranged along the convex portion 121cv as described above. Thus, in this embodiment, the cover member notch 21na remains even after the blade 710a is released, and the cover member notch 21na can be inspected by the laser beam.

  FIG. 26 is an explanatory diagram showing a state after the cover member 20 having the cover member notch 21na formed is peeled off from the reversing mold 510s1a. When the cover member notch 21na is separated from the convex portion 121cv and is in a flat state, the cover member notch 21na is closed and a compressive load is generated. As a reaction, tensile strain is applied to the outer surface of the skin material 12 (the surface on the reversing mold 510s1a side). It has been found by the inventors that S12ta and a corresponding tensile stress are generated. It has been newly found by the inventors that such compressive load and tensile stress have an effect of improving the aesthetic appearance of the cover member 20.

  Generation of such a compressive load makes it possible to make the cover member notch 21na invisible in appearance by closing the cover member 20 in a completed state. As described above, the person skilled in the art at the time of filing has a notch (notch 121n) formed in the skin material 12 so that the skin material 12 is continuous on the cabin side. From the surface of the instrument panel 100, it was regarded as almost invisible (invisible). However, in reality, since the groove 121 has a gap, the light that has passed through the cut portion of the skin material 12 and entered the inside is irregularly reflected in the groove 121, whereby the presence of the groove 121 is slightly evident. It has been found for the first time by the present inventors.

  In order to solve such a problem, the present inventor has created the manufacturing method of the second embodiment that can close the cover member notch 21na, and makes the cover member notch 21na of the cover member 20 invisible (invisible). It was realized.

  On the other hand, the inventors have also found that the generation of the tensile stress described above occurs as a reaction when the cover member notch 21na is closed, and plays a role of extending the outer surface of the skin material 12. That is, when the cover member notch 21na is in a flat state away from the convex portion 121cv, the cover member notch 21na is deformed in a direction in which the outer surface of the skin material 12 is extended. It has been found by the inventor that this can be done.

  As described above, the manufacturing method of the second embodiment reduces the friction with the cover member 20 at the time of cutting by the blade 710a and closes the cover member notch 21na after cutting to make it invisible and at the same time, By extending the surface, both manufacturability and appearance quality can be significantly improved.

D. Variations:
As mentioned above, although several embodiment of this invention was described, this invention is not limited to such embodiment at all, and implementation in various aspects is possible within the range which does not deviate from the summary. is there. In particular, elements other than the elements described in the independent claims in the constituent elements in each of the embodiments described above can be omitted as appropriate because they are additional elements.

D-1. First Modification: In each of the above-described embodiments, the vehicle instrument panel is exemplified as the interior material, but the present invention can also be applied to door trims and other interior materials.

D-2. Second Modification: In each of the above-described embodiments and modifications, not all of the above-described advantages and effects lead to the essential constituent elements of the present invention. Any design providing a degree of freedom of design that can be easily realized and providing at least one advantage or effect may be used.

The perspective view which shows the instrument panel 100 for vehicles of a present Example. Sectional drawing which shows the lamination | stacking state of the instrument panel 100 of a present Example. The disassembled perspective view which shows the structure of the groove part 121 of the instrument panel 100 in a present Example. The flowchart which shows the manufacturing method of the instrument panel 100 in 1st Example of this invention. Explanatory drawing which shows the molding machine 500 and the support stand 600 of 1st Example. Explanatory drawing which shows the state rotated 180 degree | times around the Y-axis about the shape shape | molded with the molding machine 500 of 1st Example. Explanatory drawing which shows the cross section BB of the molding machine 500 of 1st Example. The flowchart which shows the detail of the shaping | molding / lamination | stacking process of the instrument panel 100 in 1st Example. Explanatory drawing which shows a mode that the skin material 12 is brought close from the upper side of the inversion type | mold 510s1. Explanatory drawing which shows a mode that the skin material 12 was mounted in the surface of the inversion type | mold 510s1. Explanatory drawing which shows a mode that an adhesive agent is sprayed on the skin material. Explanatory drawing which shows a mode that the cushion material 14 is approached from the upper direction of the skin material 12. FIG. Explanatory drawing which shows the virtual line showing the outline shape position 121ph in which the cover member notch 21n is formed. Sectional drawing which shows the outline shape position 121ph in which the cover member notch 21n is formed. Sectional drawing which shows a mode that a notch is formed with the blade 710. FIG. Sectional drawing which shows a mode that the cutting depth is test | inspected by the laser ranging device 720. FIG. The flowchart which shows the manufacturing method of the instrument panel 100a in 2nd Example. Explanatory drawing which shows the convex part 121cv provided in the position corresponding to the formation position of the cover member notch 21n. Sectional drawing which shows the convex part 121cv in which the cover member notch 21n was formed. The perspective view which shows the positional relationship between the blade 710a and the inversion type | mold 510s1a in the vicinity of the convex part 121cv. The conceptual diagram which shows a mode that the cover member notch 21na formed on the convex part 121cv by the blade 710a is opening. Explanatory drawing which shows the mode of the internal distortion at the time of the skin material 12 and the cushion material 14 being arrange | positioned along the convex part 121cv. Explanatory drawing which shows a mode when the blade 710a begins to enter into the surface (outer peripheral surface) of the cushioning material 14. FIG. Explanatory drawing which shows a mode when the blade 710a is put into the skin material 12. FIG. Explanatory drawing which shows a mode that the cover member notch 21na is open even after extracting the blade 710a. Explanatory drawing which shows the state after peeling off the cover member 20 in which the cover member notch 21na was formed from the inversion type | mold 510s1a.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Base material panel 12 ... Skin material 14 ... Cushion material 20, 20a ... Cover member 21n, 21na ... Cover member notch 100, 100a ... Instrument panel for vehicles 101 ... Grab area 102 ... Center cluster area 103 ... Meter food area 121 ... groove part 121c ... cut surface 121n ... notch 121ph ... contour shape position 121cv ... convex part 122 ... airbag grid 200 ... airbag 500, 500a ... molding machine 510h, 510ha ... suction hole 510s, 510sa ... reversal type 510s1, 510s1e ... grab area Reversing type for 510s2 ... Reversing type for center cluster 510s3, 510s3e ... Reversing type for meter hood area 520 ... Vacuum box 520p, 520pa ... Suction hole 520v, 520va ... Cavity 540 ... Temperature control inlet / outlet 600 Support base 710,710A ... blade 720 ... laser ranging device 900 ... injector CLR ... clearance

Claims (4)

A method for manufacturing an interior material for a vehicle having an airbag grid,
A molding step of molding a skin material according to the surface shape of the base material the interior material has,
An adhering step of adhering a soft material to the molded skin material;
While maintaining the molding state, by pressing a blade against both the skin material and the soft material , a burst line that is a cut forming the air bag grid is formed in the skin material and the soft material at a time. Air bag grid forming process,
Equipped with a,
In the airbag lid forming step,
In a state where a specific portion corresponding to the burst line in both the skin material and the soft material is protruded toward the blade, the burst line is formed.
Furthermore, the manufacturing method of an interior material provided with the process of obstruct | occluding the said burst line by making the said specific part corresponding to the said burst line into a substantially planar shape following the said airbag lid formation process . It is a manufacturing method of the interior material according to claim 1,
The airbag lid formation step, the manufacturing method comprising the step of sucking the skin material on both sides of the burst line. It is a manufacturing method of the interior material according to claim 2,
The manufacturing method in which the specific portion corresponding to the burst line is formed so as to be smoothly continuous with the portion where the skin material is sucked on both sides of the burst line . It is a manufacturing method of the interior material according to any one of claims 1 to 3 , and further,
A manufacturing method provided with the test | inspection process which measures the depth of the said cutting using a laser beam, maintaining the said shaping | molding state .

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