JP2002225663A - Instrument panel and method of manufacturing for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an instrument panel with an air bag door part that is easily moldable, can reduce a man-hour for assembly and excels in safety when torn apart, and a method of manufacturing therefor. SOLUTION: The instrument panel 1 comprises a panel body part 2 and the air bag door part 3 integrally formed in part of the panel body part 2. The air bag door part 3 consists of a soft synthetic resin 31 softer than a panel forming synthetic resin 21 constituting the panel body part 2. A boundary portion 4 between the panel body part 2 and the air bag door part 3 has a grooved tear portion 41 and a narrowed portion 42 tearable in an air bag operation. The soft synthetic resin 31 of the air bag door part 3 is fused to the panel forming synthetic resin 21 of the panel body part 2 beyond the narrowed portion 42.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an instrument panel having an airbag door which opens when an airbag is operated, and a method for manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, in an automobile, it is known to provide an airbag device on an instrument panel provided in a front portion of the interior of the automobile in order to protect a person riding on a passenger seat of the automobile. As shown in FIG. 8, the airbag device 95 is installed on the back side 901 of the instrument panel 9.
Is provided with an airbag door 93 so that the airbag body 951 of the airbag device 95 can inflate inward of the vehicle.

The airbag door 93 has a hooking claw 931 which can be hooked on the opening end 921 of the panel main body 92 of the instrument panel 9. The stop claw 931 is connected to the open end 9
21 is attached to the instrument panel 9. Then, when the airbag device 95 is activated at the time of a collision of a car or the like, the airbag bag body 951
Due to the inflating force of the airbag, the locking claw 931 is released and the airbag door 93 is opened, and the airbag body 951 is opened.
Are expanded in the vehicle.

[0004]

However, in the above-described conventional mounting structure of the airbag door 93, a gap groove 94 formed between the airbag door 93 and the opening end 921 of the panel body 92 is formed on the design surface. It is exposed. The gap groove 94 is formed between the airbag door 93 and the panel body 92.
Due to the molding error, the width may vary, and in some cases, the appearance and design may be impaired.

Therefore, it is conceivable to form the airbag door 93 integrally with the panel body 92.
However, in this case, when the airbag door 93 is broken and opened by the force of inflating the airbag bag body 951, there is a possibility that minute resin fragments generated by the break may be scattered inside the vehicle. It is necessary to take measures.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and provides an airbag door which is easy to form, can reduce the number of assembling steps, and is excellent in safety at breakage. It is an object of the present invention to provide an instrument panel having the same and a method of manufacturing the same.

[0007]

According to a first aspect of the present invention, there is provided a panel main body and an airbag door provided integrally with a part of the panel main body. It is made of a soft synthetic resin that is softer than the synthetic resin for the panel constituting the main body, and a groove-shaped tier is formed at a boundary between the panel main body and the airbag door. The soft synthetic resin of the airbag door portion extends over the narrow portion and has a narrow portion that is reduced in thickness by the formation of the portion and a narrow portion that breaks when the airbag is actuated. An instrument panel characterized by being fused with the panel synthetic resin in a panel body.

What is most notable in the present invention is that the soft synthetic resin of the airbag door portion is fused with the synthetic resin for the panel in the panel main body beyond the narrow portion. .

Next, the operation and effect of the present invention will be described.
The airbag door according to the present invention is provided integrally with a part of a panel main body of the instrument panel. Therefore, the airbag door portion and the panel body portion can be simultaneously molded using the same molding die, and this molding is easy. In addition, costs for molding can be reduced. In addition, the airbag door can be assembled at the same time as the instrument panel is assembled to the vehicle. Therefore, the man-hour for assembling the airbag door to the instrument panel becomes unnecessary.

At the boundary between the panel body and the airbag door, the grooved tier and the narrow portion are provided. Therefore, when the airbag of the vehicle equipped with the instrument panel operates, the stress concentration can be easily generated in the tier portion by the expanding force of the airbag. Therefore, the airbag door can be easily broken at the narrow portion.

Further, the soft synthetic resin is fused to the panel synthetic resin in the panel main body beyond the narrow portion. Therefore, the break in the narrow portion of the airbag door portion can be performed in the soft synthetic resin. Therefore, the airbag door portion can be more easily broken at the narrow portion.

Further, when the narrow portion is broken, the broken end is exposed on the surface. At this time, since the broken end portion is made of the above-mentioned soft synthetic resin, there is almost no possibility that finer resin fragments are scattered inside the vehicle than the broken portion. Even if the fragments are scattered, the fragments are made of the above-mentioned soft synthetic resin, so that the occupants of the automobile are hardly damaged and are safe. Therefore, the instrument panel having the airbag door portion is excellent in safety.

On the other hand, the panel main body, which occupies most of the instrument panel, is made of a synthetic resin for a panel which is harder than the soft synthetic resin. Therefore, the breakage of the airbag door portion at the tier portion can be further facilitated, and the panel body can easily respond to the impact due to the rupture.

Next, as in the second aspect of the present invention, it is preferable that the tier portion is provided on a back side surface of the instrument panel. Thus, the tier portion of the instrument panel is not exposed to the design surface in the vehicle, and the instrument panel can have an appearance as if no airbag is mounted. Therefore, the instrument panel can exhibit excellent appearance design.

Next, as in the third aspect of the present invention, it is preferable that the groove-shaped tier is formed in a V-shape or a U-shape. Thereby, stress concentration can be easily generated in the tier portion, and the airbag door portion can be easily broken at the narrow portion.

Next, according to the present invention, the panel main body is made of polypropylene resin.
The airbag door is preferably made of a thermoplastic elastomer. Thus, the panel synthetic resin in the panel body and the soft synthetic resin in the airbag door can be easily formed. It is preferable that the polypropylene resin and the thermoplastic elastomer have similar molding shrinkage and linear expansion coefficient. As a result, they can be easily fused to each other, and due to the fusion, wrinkles are formed on the surface of the panel body or the airbag door, and the boundary between the panel body and the airbag door is formed. Cracking can be prevented.

Next, as in the invention according to claim 5, the fusion of the soft synthetic resin and the synthetic resin for a panel is performed at a position 5 to 10 mm away from the narrow portion in the panel body. Is preferred. This gives
The strength of the panel body can be easily secured, and the safety when the airbag door is broken at the narrow portion can be more easily secured.

According to a sixth aspect of the present invention, there is provided a panel main body and an airbag door provided integrally with a part of the panel main body. It is made of a soft synthetic resin that is softer than the synthetic resin for the panel that composes the main body, and has a groove at the boundary between the panel main body and the airbag door that breaks when the airbag is activated. In a method of manufacturing an instrument panel having a certain tier portion and a narrow portion which is a portion whose thickness is reduced by forming the tier portion by using a molding die, the molding die may include a front surface of the instrument panel. It comprises a first molding die for molding and a second molding die for molding the back surface of the instrument panel, and the second molding die has a band-like projection for molding the tier. When the first mold and the second mold are closed, the mold has a first cavity for molding the airbag door on one side of the band-shaped projection, and the other cavity has the other cavity. The side is configured to form a second cavity for molding the panel body.
When molding the instrument panel,
The first cavity is filled with the soft synthetic resin and the second cavity.
The synthetic resin for a panel is injected into the cavity, the soft synthetic resin flows into the second cavity beyond the first cavity, and the soft synthetic resin and the synthetic resin for the panel are mixed in the second cavity. A method of manufacturing an instrument panel, wherein the two are integrated by fusing.

Next, the operation and effect of the present invention will be described.
The molding die of the instrument panel is the first
The first mold and the second mold are composed of a mold and a second mold.
When the mold is closed, the first cavity and the second cavity are formed. In addition, at least one of the first molding die and the second molding die has an inlet for the soft synthetic resin and the panel synthetic resin connected to the first cavity and the second cavity when they are closed. Is provided.

In forming the instrument panel, the soft synthetic resin and the synthetic resin for the panel are injected from each gate. At this time, the injection is performed at a timing at which the soft synthetic resin forming the airbag door reaches the strip-shaped protrusion before the panel synthetic resin forming the panel main body.

The second mold has a band-shaped protrusion for molding the tier. Therefore, the first
The flow rate of the soft synthetic resin that has flowed from the cavity and reached the tier portion is limited by the belt-shaped protrusion. Further, the belt-shaped protrusion can suppress the flow of the excessive soft synthetic resin flowing into the second cavity beyond the band-shaped protrusion.

In the first cavity, it is preferable that a gate for injecting the soft synthetic resin is provided at a position having a distance as uniform as possible from each side of the strip-shaped protrusion. Thereby, the soft synthetic resin can easily and uniformly reach each side of the strip-shaped protrusion, and it is possible to easily prevent excess soft synthetic resin from flowing into the second cavity. .

After the soft synthetic resin flowing from the first cavity reaches the band-shaped protrusion, the soft synthetic resin flows toward the second cavity, and the soft synthetic resin flows from the second cavity to the band-shaped protrusion. It joins with the panel synthetic resin flowing toward the second cavity. At the confluence, the soft synthetic resin and the synthetic resin for the panel are fused, and they are integrated into an instrument having an airbag door portion made of a soft synthetic resin and a panel body made of the synthetic resin for the panel. The ment panel is formed. Thereafter, the first mold and the second mold are opened, and the formed instrument panel is taken out.

In this manner, the instrument panel having the airbag door portion which is easy to form, can reduce the number of assembling steps, and is excellent in safety at breakage can be formed.

Next, as in the present invention, it is preferable that the synthetic resin for a panel is made of a polypropylene resin, while the soft synthetic resin is made of a thermoplastic elastomer. The polypropylene resin and the thermoplastic elastomer have similar molding shrinkage and linear expansion coefficient. Therefore, they can be easily fused to each other, and the fusion may cause wrinkles on the surface of the panel body or the airbag door, or the panel body or the airbag door may be broken. Can be prevented.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment An instrument panel according to a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 (a),
As shown in (b), the instrument panel 1 in this example includes a panel main body 2 and an airbag door 3 provided integrally with a part of the panel main body 2. The airbag door portion 3 is formed on the passenger side of the instrument panel 1. The airbag door 3 is
The panel main body 2 is made of a soft synthetic resin 31 that is softer than the panel synthetic resin 21.

In the instrument panel 1, a groove-shaped tear portion 41 and a tear portion 4 are formed at a boundary portion 4 between the panel main body portion 2 and the airbag door portion 3.
1 and a narrow portion 42 which is reduced in thickness when the airbag 5 is operated and which has a reduced thickness.
Further, the soft synthetic resin 31 of the airbag door portion 3 is used.
Is fused to the panel synthetic resin 21 in the panel body 2 beyond the narrow portion 42.

The details will be described below. As shown in FIG. 2A, the groove-shaped tear portion 41 is formed in a V-shape on the back side surface 102 of the instrument panel 1, and the narrow portion 42 is formed on the instrument panel 1.
Are formed on the front side surface 101. Note that FIG.
As shown in (b), the tier portion 41 may be formed in a U shape instead of a V shape.

The panel synthetic resin 21 forming the panel body 2 is a polypropylene resin (PP), while the soft synthetic resin 31 forming the airbag door 3 is made of a thermoplastic elastomer. Is an olefin-based elastomer. The polypropylene resin and the olefin-based elastomer have similar molding shrinkage and linear expansion coefficient. Thus, the instrument panel 1 is formed by two-color molding.

As shown in FIG. 2 (a), the narrow portion 42 has a virtual fracture surface 4 forming a fracture end 422 (see FIG. 3 (b)) when the airbag door 3 fractures.
21 (represented by a broken line in FIG. 2A).
Then, the soft synthetic resin 31 and the panel synthetic resin 21 are used.
The distance L1 from the virtual fracture surface 421 to the fusion surface 40 between the soft synthetic resin 31 and the synthetic resin 21 for a panel is about 5 mm.

The thickness L2 of the narrow portion 42 is 0.6 m
m. Note that the thickness L2 of the narrow portion is 0.4
It is preferably about 0.8 mm. Thereby, the airbag door portion 3 can be more easily broken at the narrow portion 42.

As shown in FIG. 2C, the airbag door portion 3 is formed continuously with the tier portion 41 and the narrow portion 42 and the panel main body portion 2 and the tier portion 4 is formed.
1 and a narrow portion 42 and a hinge portion 43 forming the outer shape of the airbag door portion 3. In addition, the airbag door portion 3 includes the tier portion 41 and the narrow portion 42 on the rear side and the left and right sides, and the hinge portion 43 on the front side.

When the narrow portion 42 is broken, the airbag door portion 3 can be opened with the hinge portion 43 as a center of rotation. Also,
The hinge portion 43 can prevent the airbag door portion 3 after opening from flying away from the instrument panel 1.

The airbag door section 3 may be formed so as to be entirely surrounded by the tier section 41 and the narrow section 42 in the structure of the present embodiment. In this case, the rear side surface 102 of the airbag door 3 is provided so that the airbag door 3 does not fly away from the instrument panel 1 when it breaks at the narrow portion 42. A detachment prevention device to be fixed is provided.

As shown in FIG. 3A, an airbag door 3 is provided on the passenger seat side of the instrument panel 1 provided in the front of the vehicle, and a rear side surface 102 of the airbag door 3 is provided. Is provided with an airbag device 5. The airbag device 5 includes an airbag case 51 having an opening on the instrument panel 1 side and an inflator 52 provided on a bottom 511 of the airbag case 51.
And an airbag body 53 connected to the inflator 52 and housed inside the airbag case 51.

Then, as shown in FIG. 3B, when the airbag device 5 is operated due to a collision of a car or the like, the inflator 52 instantaneously generates a high-pressure gas. The airbag body 53 is inflated by the high-pressure gas to break the airbag door portion 3 at the narrow portion 42 and spread inside the vehicle.

Next, the operation and effect of this embodiment will be described. The airbag door section 3 in this example is provided integrally with a part of the panel main body section 2 of the instrument panel 1. Therefore, the airbag door 3
And the panel main body 2 can be simultaneously molded using the same mold, and this molding is easy. Also,
Costs for molding can be reduced. In addition, the airbag door section 3 can be assembled at the same time as the instrument panel 1 is assembled to an automobile. Therefore, the man-hour for assembling the airbag door section 3 to the instrument panel 1 is not required.

The panel body 2 and the airbag door 3
The grooved tier portion 41 and the narrow portion 42 are provided at a boundary portion 4 between the ridge portion and the groove portion. Therefore, when the airbag device 5 of the vehicle equipped with the instrument panel 1 is operated, stress concentration can be easily generated in the tier portion 41 by the inflating force of the airbag bag 53. Therefore, the airbag door portion 3 can be easily broken at the narrow portion 42.

Further, the fusion between the soft synthetic resin 31 and the panel synthetic resin 21 is 5 m closer to the panel main body 2 than the virtual fracture surface 421 in the narrow portion 42.
m. Therefore, breakage at the narrow portion 42 of the airbag door 3 can be performed in the soft synthetic resin 31. Therefore, the airbag door portion 3 can be more easily broken at the narrow portion 42.

As shown in FIG. 3B, when the imaginary fractured surface 421 of the narrow portion 42 is broken, the airbag door 3 and the panel body divided by the imaginary fractured surface 421. Break end 42 of part 2
2 is exposed on the surface. At this time, these fractured ends 42
2 is made of the soft synthetic resin 31, there is almost no possibility that fine resin fragments are scattered inside the vehicle from the broken end portion 422. Even if the fragments are scattered, since the fragments are made of the soft synthetic resin 31, there is almost no damage to a person who is riding in the automobile, which is safe. Therefore, the instrument panel 1 having the airbag door 3 is excellent in safety.

On the other hand, the panel body 2 occupying most of the instrument panel 1 is made of a panel synthetic resin 21 which is harder than the soft synthetic resin 31. Therefore, the narrow portion 4 of the airbag door portion 3
2 can be more easily broken,
The panel body 2 can easily respond to the impact due to the break.

The tier portion 41 is provided on the back side surface 102 of the instrument panel 1. Therefore, the tier portion 41 is not exposed to the design surface in the vehicle, and the instrument panel 1 can have an appearance as if the airbag device 5 is not mounted. Therefore, the instrument panel 1 can exhibit excellent appearance design.

The polypropylene resin forming the panel main body 2 and the olefin elastomer forming the airbag door 3 have similar molding shrinkage and linear expansion coefficient. Therefore, they can be easily fused to each other, and this fusion causes wrinkles to be formed on the surface of the panel main body 2 or the air back door 3, or the connection between the panel main body 2 and the air back door 3. It is possible to prevent the boundary portion 4 from breaking.

Embodiment 2 This is an example showing a method for manufacturing the instrument panel 1 described in Embodiment 1 above. As shown in FIG. 4A, the molding die 6 of the instrument panel 1 is used.
A first molding die 61 for molding the front surface 101 of the instrument panel 1;
And a second molding die 62 for molding the rear side surface 102 of the second molding die 62.
In addition, as shown in FIG. 4B, the second molding die 62 has a band-shaped projection 621 for molding the tier portion 41 at a position corresponding to each side of the instrument panel 1 on the rear side and on both left and right sides. are doing.

As shown in FIG. 5A, when the first and second molding dies 61 and 62 are closed, the molding die 6 is located on one side of the band-shaped projection 621. A first cavity 63 for molding the airbag door portion 3 is formed on an inner portion surrounded by the protruding portion 621, and a first cavity 63 for forming the panel main body portion 2 is formed on an outer portion of the band-shaped protruding portion 621 on the other side. It is configured to form two cavities 64.

As shown in FIG. 5B, when the instrument panel 1 is molded, the first cavity 63 is filled with the soft synthetic resin 31 and the second cavity 64 is filled with the synthetic resin 21 for the panel. Inject.
Then, the soft synthetic resin 31 is transferred to the first cavity 6.
3 and flows into the second cavity 64, and in the second cavity 64, the soft synthetic resin 3
The instrument panel 1 is molded by fusing the synthetic resin 1 and the panel synthetic resin 21 to integrate them.

Next, the molding die 6 for molding the instrument panel 1 will be described in detail. In the present embodiment, as shown in FIG. 4A, the first molding die 61 has a soft connection to the first cavity 63 when the first molding die 61 and the second molding die 62 are closed. A first gate 631 serving as an injection port of the synthetic resin 31 is provided. The second mold 62 is provided with the second cavity 64 when the second mold 62 and the first mold 61 are closed. Is provided with a second gate 641 which is an injection port of the synthetic resin 21 for the panel. The first gate 631 and the second gate 6
Each of 41 may be provided in the first molding die 61 or may be provided in the second molding die 62.

As shown in FIG. 4B, the opening 634 of the first gate 631 is located in the first cavity 63 at a position having a substantially equal distance from each side of the band-shaped protrusion 621, that is, the band-shaped protrusion. 621 is provided at a substantially middle position surrounded by each side. Also, the second gate 64
The one opening 644 is provided in the second cavity 64 in the vicinity of each side of the strip-shaped protrusion 621.

At the outer end 632 of the first gate 631, an injection nozzle 633 for injecting the soft synthetic resin 31 is provided.
An injection nozzle 643 for injecting the panel synthetic resin 21 is provided at the outer end 642 of the second gate 641. The second molding die 62 is provided with a knockout rod 65 for taking out the instrument panel 1 after molding.

Next, a method of forming the instrument panel 1 will be described in detail. As shown in FIG. 6A, first, the first molding die 61 and the second molding die 62 are closed,
The first cavity 63 and the second cavity 64 are formed. Next, as shown in FIG. 6B, the soft synthetic resin 31 is injected into the first cavity 63 from the first gate 631. Next, as shown in FIG.
The soft synthetic resin 31 is made to slightly flow into the second cavity 64 from the tip 622 of the strip-shaped protrusion 621. At this time, the panel synthetic resin 21 is injected from the second gate 641 into the second cavity 64.

Next, as shown in FIG. 7B, the soft synthetic resin 31 and the panel synthetic resin 21 flowing from the second cavity 64 toward the strip-shaped protrusion 621 are mixed in the second cavity 64. Merge. At the confluence, the soft synthetic resin 31 and the synthetic resin for panel 21 are fused together, and they are integrated into an airbag door section 3 made of the soft synthetic resin 31 and a panel made of the synthetic resin for panel 21. The instrument panel 1 having the main body 2 is formed.

Thereafter, the first molding die 61 and the second molding die 62 are opened, and the molded instrument panel 1 is taken out. Thus, the instrument panel 1 having the airbag door 3 is formed.

As described above, the first gate 631 is
The first cavity 63 is provided at a position having a substantially equal distance from each side of the strip-shaped protrusion 621. Therefore, the soft synthetic resin 31 is connected to the band-shaped protrusion 621.
Can be easily and evenly reached, and it is possible to easily prevent excessive soft synthetic resin 31 from flowing into the second cavity 64.

The second molding die 62 has a band-shaped protrusion 621 for molding the tear portion 41. Therefore, the flow rate of the soft synthetic resin 31 flowing from the first cavity 63 and reaching the tier portion 41 is limited by the band-shaped protrusion 621. Therefore, the belt-shaped protrusion 621 can suppress the excessive flow of the soft synthetic resin 31 flowing into the second cavity 64 beyond the band-shaped protrusion 621.

As described above, the instrument panel 1 described in the first embodiment can be formed. And this molded instrument panel 1
Can obtain the same operation and effect as the instrument panel 1 described in the first embodiment.

[0056]

As described above, according to the present invention, an instrument panel having an airbag door portion which can be easily formed, reduces the number of assembling steps, and is excellent in safety at breakage. The manufacturing method can be provided.

[Brief description of the drawings]

FIGS. 1A and 1B are cross-sectional explanatory views showing an airbag door portion of an instrument panel according to a first embodiment, and FIGS.
FIG. 1 is an overall explanatory diagram showing an instrument panel.

FIGS. 2A and 2B are cross-sectional explanatory views showing a tier portion and a narrow portion of an airbag door portion in the first embodiment, and FIG. 2B is a cross-sectional explanatory diagram showing a U-shaped tier portion of another airbag door portion. (C) Explanatory drawing which shows an airbag door part.

FIGS. 3A and 3B are views showing the airbag device according to the first embodiment, and are explanatory diagrams showing a state before operation and a state after operation;

FIGS. 4A and 4B are diagrams illustrating a molding die of an instrument panel according to a second embodiment, wherein FIG. 4A is a cross-sectional explanatory view illustrating a state where a first molding die and a second molding die are opened, and FIG. FIG. 4 is an explanatory perspective view showing a band-shaped protrusion of the mold.

FIG. 5 is a view showing a molding die of an instrument panel according to a second embodiment, in which (a) a state in which a first molding die and a second molding die are closed, and (b) a state in which the instrument panel is molded. FIG.

6A and 6B show a state in which a first cavity and a second cavity are closed to form a first cavity and a second cavity, and FIG. 6B shows a state in which a soft synthetic resin is filled in the first cavity. Sectional explanatory drawing which shows the state which injected.

FIG. 7 is a view showing a state in which (a) the soft synthetic resin slightly flows into the second cavity side from the tip of the belt-shaped protrusion in the second embodiment, (b) the soft synthetic resin and the panel synthetic resin merge, Sectional explanatory drawing which shows the state in which the instrument panel was shape | molded.

FIG. 8 is an explanatory cross-sectional view showing a mounting structure of an airbag door in an instrument panel in a conventional example.

[Explanation of symbols]

 1. . . Instrument panel, 102. . . Back side, 2. . . Panel body, 21. . . 2. Synthetic resin for panels, . . Airbag door section, 31. . . 3. soft synthetic resin; . . Border part, 41. . . Tier part, 42. . . Narrow part, 5. . . Airbag device,

Claims (7)

[Claims] An airbag door is provided integrally with a part of the panel main body, and the airbag door is made of a synthetic resin for a panel constituting the panel main body. Is formed of a soft synthetic resin, and a boundary between the panel body and the airbag door is provided with a groove-shaped tear portion and a portion having a reduced thickness due to the formation of the tear portion. In the instrument panel provided with a narrow portion that is broken when the airbag is operated, the soft synthetic resin of the airbag door portion crosses over the narrow portion and the panel synthetic resin in the panel body portion. Instrument panel characterized by being fused. 2. The instrument panel according to claim 1, wherein the tier portion is provided on a back side surface of the instrument panel. 3. The instrument panel according to claim 1, wherein the groove-shaped tier is formed in a V-shape or a U-shape. 4. The method according to claim 1, wherein:
The instrument panel according to claim 1, wherein the panel body is made of a polypropylene resin, while the airbag door is made of a thermoplastic elastomer. 5. The method according to claim 1, wherein:
The fusion of the soft synthetic resin and the synthetic resin for the panel
5 to 10 mm from the narrow portion in the panel body
An instrument panel characterized by being performed at a remote location. 6. A panel main body and an airbag door portion provided integrally with a part of the panel main body portion, and the airbag door portion is made of a synthetic resin for a panel constituting the panel main body portion. Is formed of a soft synthetic resin, and at the boundary between the panel body and the airbag door, a tier, which is a groove that breaks when the airbag is activated, is formed. In a method for manufacturing an instrument panel having a narrow portion which is a portion whose thickness is reduced by a molding die, the molding die comprises: a first molding die for molding a front surface of the instrument panel; A second molding die for molding the rear side surface of the ment panel, and the second molding die has a band-shaped protrusion for molding the tier portion;
When the first mold and the second mold are closed, the mold has a first cavity for molding the airbag door on one side of the strip-shaped protrusion and a cavity on the other side. A second cavity for molding the panel body is formed. In molding the instrument panel, the first cavity is made of the soft synthetic resin, and the second cavity is made of the panel for the panel. Injecting synthetic resin, allowing the soft synthetic resin to flow into the second cavity beyond the first cavity,
A method for manufacturing an instrument panel, comprising: fusing the soft synthetic resin and the panel synthetic resin in the second cavity to integrate the two. 7. The method for manufacturing an instrument panel according to claim 6, wherein the synthetic resin for a panel is made of a polypropylene resin, while the soft synthetic resin is made of a thermoplastic elastomer.