KR20220048325A - Crash pads for vehicles and how they are manufactured - Google Patents

Abstract

The present invention enables an airbag to be easily deployed since a deployment line formed in an airbag door of a passenger seat is broken by deployment pressure of the airbag. A crash pad for a vehicle comprises: a substrate unit forming a framework; scrim coupled into the substrate unit of an airbag door area of the passenger seat through an insert injection method; a skin unit, of which one surface is exposed to the outside, disposed in an upper portion of the substrate unit; and foam disposed between the substrate unit and the skin unit. The substrate unit has an X-shaped punch hole formed on a rear surface of the airbag door area of the passenger seat.

Description

Crash pad for vehicle and manufacturing method thereof

The present invention relates to a crash pad for a vehicle and a method for manufacturing the same, in which a deployment line formed on a passenger-side airbag door is damaged by the deployment pressure of the airbag to facilitate deployment of the airbag.

Typically, a crash pad for a vehicle is an interior part of a car and is installed on the lower front part of the driver's seat. designed to be

In addition, the crash pad is a very important part in terms of stability, such as a built-in airbag and placed in front of the driver's and front passenger's seat to minimize the force transmitted to the passenger from an external shock in an unexpected collision or rollover accident, thereby reducing injuries. am.

In particular, the passenger seat airbag (PAB, PASSENGER AIR BAG) installed inside the airbag door formed on the passenger side of the crash pad protects the safety of the passenger in the passenger seat in the event of a crash.

A cutout groove is formed in the core and skin on the crash pad corresponding to the rear surface of the airbag door through scoring.

The incision groove allows the airbag door to be easily damaged by the deployment pressure according to the volume expansion of the passenger seat airbag when a car collides.

On the other hand, the airbag door inserts a scrim made of a fabric material into the airbag door in order to prevent cracks between the rigid and stranded materials.

The airbag door is injection molded with a rigid material and a flexible material, and the rigid material forms a rigid loop and a rigid post, and the flexible material forms a flexible loop and a flexible post.

And, the point where the rigid material and the soft material meet is the boundary portion, and is made of the cutout groove.

The scrim is inserted into the airbag door to prevent the incision groove from cracking and breaking while the vehicle is driving to secure the deployment robustness of the airbag door.

However, although the robustness of the airbag door is secured due to the addition of the scrim to the airbag door, there is a problem in that the cost increases according to the unit cost of the scrim and investment in the scrim supply facility.

In addition, when the incision grooves are formed in the core and skin on the crash pad in an IN MOLD method, the unit cost and investment cost of supply equipment can be reduced by scoring, but the thickness of the foam disposed on the upper part of the crash pad If is thin, the structure of the in-mold hole protrudes from the exterior of the airbag door.

For this reason, there is a problem in that the appearance quality of the airbag door is deteriorated due to the in-mold hole in the related art.

In addition, in the in-mold method, the resin can flow only through the hole and the bridge between the holes even in the resin flow during the molding of the crash pad, so there is a limitation in the molding of the crash pad.

The present invention for solving the above problems is a vehicle crash capable of reinforcing the rigidity of the passenger airbag door, enabling the passenger airbag to be easily deployed, improving the appearance quality of the passenger airbag door, and reducing the crash pad manufacturing cost to provide pads.

The above and other objects, advantages and features of the present invention, and a method for achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings.

In order to achieve the above object, there is provided a crash pad for a vehicle of the present invention in which a passenger airbag door, in which a passenger airbag is installed, is integrally coupled to the inside of the passenger seat in the direction of the passenger seat, comprising: a base unit constituting a skeleton; a scrim (SCRIM) coupled to the inside of the base part of the passenger seat airbag door area by an insert injection method; a skin part disposed on the base part and having one surface exposed to the outside; and foam disposed between the base part and the skin part, wherein, in the base part, punch scoring is performed on the rear surface of the passenger airbag door area to form an X-shaped punch hole, the punch hole This formed area is flat.

The punch hole causes the scrim to break when the passenger seat airbag is deployed.

The punch holes may include: a plurality of first punch lines formed in a width direction of the base unit formed in the passenger airbag door area; a second punch line formed in a vertical direction from both ends of the first punch line; a third punch line formed from both ends of the second punch line toward a corner of the passenger airbag door; and a fourth punchline extending in a vertical direction and a horizontal direction, respectively, from an end of the third punchline.

When the punch hole is broken, the cut-out grooves between the pair of fourth punch lines respectively formed in the left and right directions are fixed, and the cut-out grooves between the pair of fourth punch lines respectively formed in the up-down direction are fixed.

A cut-out groove is formed at a position corresponding to the breaking hole on the rear surface of the passenger seat airbag door area in the base unit.

The cut-out groove may include a first cut-out line extending in a width direction of the base portion formed in the passenger-side airbag door region; a second incision line extending in the vertical direction from both ends of the first incision line; a third cut-out line extending from both ends of the second cut-out line toward a corner of the passenger-side airbag door, respectively; and a fourth incision line extending from the end of the third incision line in a vertical direction and in a horizontal direction to connect the ends of the plurality of third incision lines, respectively.

The first punch line is formed along the first cut line, the second punch line is formed along the second cut line, the third punch line is formed along the third cut line, and the third punch line is formed along the third cut line. 4 punch lines are formed along the fourth incision line.

The cutout groove is formed on a surface of the base part in a direction in which the passenger airbag is disposed in the passenger airbag door region.

A method of manufacturing a crash pad for a vehicle of the present invention in which a passenger airbag door is integrally coupled to a passenger seat airbag installed inside a passenger seat direction, the method comprising: insert-injecting a scrim into a base material forming a skeleton; forming a plurality of incision grooves in the base portion of the passenger seat airbag door area; seating and fixing the base part on the lower mold jig; disposing an upper type jig equipped with a trim knife in the passenger airbag door area above the lower type jig to which the base part is fixed; forming a plurality of punch holes by performing punch scoring in the incision groove; Mounting the skin part on the upper part of the foam mold and mounting the base part on the lower part; and forming a foam between the skin part and the base part.

The thickness of the foam is made of 4mm to 5mm.

According to the present invention, the incision groove is the X-shaped incision formed in the base part by breaking the entire passenger airbag door in an X-shape due to the third incision line when the passenger-side airbag is deployed. can be shortened to

When the scrim is insert-injected and coupled to the base portion of the passenger-side airbag door region, the robustness of the passenger-side airbag door can be improved.

Punch scoring may improve the quality of the exterior of the substrate by not protruding to the outside when the punch hole is formed in the substrate portion.

The through-hole can obtain the same effect as a punch hole at a point where the cut-out grooves intersect each other in the base part.

1 is a perspective view showing a crash pad for a vehicle according to an embodiment of the present invention.
2 is an exploded perspective view of a crash pad for a vehicle according to an embodiment of the present invention;
3 is a partial bottom view illustrating a bottom surface of a passenger airbag door of a crash pad for a vehicle according to an embodiment of the present invention;
4 is a cross-sectional view showing an extension of a crash pad for a vehicle according to an embodiment of the present invention.
5 is a perspective view illustrating a scrim of a crash pad for a vehicle according to an embodiment of the present invention;
6 is a partial bottom view illustrating a bottom surface of a passenger airbag door of a crash pad for a vehicle according to another embodiment of the present invention;
7 is a comparative view showing a cross-section of a crash pad for a vehicle and a cross-section of a conventional crash pad according to another embodiment of the present invention.
8 is a partial bottom view illustrating a through hole of a passenger airbag door of a crash pad for a vehicle according to another embodiment of the present invention;
9 is an enlarged view of an enlarged portion "A" shown in FIG.
FIG. 10 is an enlarged view of part “B” shown in FIG. 7 .
11 is a partial bottom view illustrating a bottom surface of a passenger airbag door of a crash pad for a vehicle according to another embodiment of the present invention;
12 is a flowchart illustrating a method of manufacturing a crash pad for a vehicle according to another embodiment of the present invention.
13 is a flowchart illustrating a method of manufacturing a crash pad for a vehicle according to another embodiment of the present invention.

Examples of the present invention are provided to more completely explain the present invention to those of ordinary skill in the art, and the following examples may be modified in various other forms, and the scope of the present invention is as follows It is not limited to an Example. Rather, these examples are provided so that this disclosure will be more thorough and complete, and will fully convey the spirit of the invention to those skilled in the art. In addition, in the following drawings, each configuration is exaggerated for convenience and clarity of description, and the same reference numerals refer to the same elements in the drawings. As used herein, the term “and/or” includes any one and any combination of one or more of those listed items.

The terminology used herein is used to describe specific embodiments, not to limit the present invention.

As used herein, the singular form may include the plural form unless the context clearly dictates otherwise. Also, as used herein, “comprise” and/or “comprising” refers to specifying the presence of the recited shapes, numbers, steps, actions, members, elements, and/or groups thereof. and does not exclude the presence or addition of one or more other shapes, numbers, movements, members, elements and/or groups.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing a crash pad for a vehicle according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of a crash pad for a vehicle according to an embodiment of the present invention, and FIG. 3 is an embodiment of the present invention It is a partial bottom view showing the bottom surface of the passenger seat airbag door of the crash pad for a vehicle, FIG. 4 is a cross-sectional view showing the extension of the crash pad for a vehicle according to an embodiment of the present invention, and FIG. It is a perspective view showing the scrim of the pad.

1 to 5 , the crash pad 100 has rigidity to protect passengers in the vehicle interior from external impact, and a button insertion hole 110 into which a device such as an air conditioner and a control button for operating the same are inserted. ), a vent insertion hole 120 in which an air vent is mounted, and an airbag module insertion hole (not shown) in which an airbag is mounted may be formed.

In addition, in the crash pad 100 for a vehicle, the front passenger airbag door 200 is integrally coupled to the passenger seat direction, and the passenger seat airbag is installed inside the passenger seat airbag door 200 .

As shown in FIG. 2 , the vehicle crash pad 100 includes a base unit 300 , a scrim 400 , a skin unit 500 , and foam 600 .

The base unit 300 constitutes the skeleton of the crash pad 100 for the vehicle, forms the front of the driver's seat and the front passenger's seat, and has rigidity to protect passengers in the vehicle interior from external impacts in the event of a vehicle collision or rollover accident.

In addition, the base unit 300 is formed in a non-planar three-dimensional shape having a curved surface, a curved surface, an uneven surface, etc. in order to reduce the injury of the occupant due to a collision and provide a beautiful appearance.

The base unit 300 is made of polypropylene or polyurethane, or a combination thereof.

In addition, the base unit 300 may be made of a material such as wood or metal.

The base part 300 includes a cutout groove 310 and an extension part 340 .

The cut-out groove 310 is an area in which the passenger seat airbag is disposed so that when the passenger seat airbag door 200 is deployed, the skin part 500 and the foam 600 that have not undergone the scoring process are smoothly deployed, that is, , is formed in the passenger airbag door 200 .

Specifically, as shown in FIG. 2 , the cut-out groove 310 is formed on the rear surface of the base unit 300 of the airbag door area, that is, the surface in the direction in which the passenger seat airbag is disposed.

The cut-out groove 310 has a thickness thinner than that of the front passenger's airbag door 200 .

That is, the cut-out groove 310 is formed in a groove shape without passing through the passenger seat airbag door 200 .

The cut-out groove 310 allows the passenger-side airbag door 200 to be easily broken along the cut-out groove 310 by the deployment pressure according to the deployment of the passenger-side airbag when the passenger-side airbag is deployed due to a car crash.

That is, when the base unit 300 is inflated by the passenger seat airbag, it is deployed along the incision groove 310 .

As shown in FIG. 3 , the cut-out groove 310 includes a first cut-out line 311 , a second cut-out line 312 , a third cut-out line 313 , and a fourth cut-out line 314 .

The first cut-out line 311 extends in the width direction from the base unit 300 formed in the area of the passenger airbag door 200 .

The second incision line 312 extends in the vertical direction from both ends of the first incision line 311 in the base unit 300 formed in the area of the passenger airbag door 200 .

The length of the second incision line 312 is shorter than the length of the first incision line 311 and the third incision line.

The third cut-out line 313 extends from both ends of the second cut-out line 312 in the base unit 300 formed in the area of the passenger-side airbag door 200 toward the edge of the passenger-side airbag door 200, respectively.

That is, in the cut-out groove 310, when the passenger-side airbag is deployed, the passenger-side airbag door 200 is ruptured in an X-shape as a whole due to the third cut-out line 313 .

The fourth cut-out line 314 connects the ends of the third cut-out line 313 extending in the edge direction of the passenger-side airbag door 200, respectively.

That is, the fourth cut-out line 314 extends in the vertical and horizontal directions to form an outer frame of the passenger airbag door 200 .

Therefore, when the passenger seat airbag is deployed, the first incision line 311, the second incision line, and the third incision line 313 are broken by the deployment pressure of the passenger seat airbag, and the first incision line 311 and the second incision line 311 are broken. The passenger seat airbag is deployed between the incision line 312 and the third incision line 313 .

And, the X-shape of the cut-out groove 310 pulls the skin unit 500 in three directions while the cut-out groove 310 of the base unit 300 breaks in an X-shape when the passenger airbag is deployed from the airbag door.

Therefore, the X-shaped incision groove 310 formed in the base unit 300 is formed by the shear force caused by the damage of the airbag door without a separate scoring process on the skin unit 500 and the foam 600 . ) and the foam 600 can be easily torn.

Accordingly, the X-shaped cut-out groove 310 formed in the base unit 300 can significantly shorten the deployment time of the passenger airbag.

Meanwhile, in the cut-out groove according to another embodiment of the present invention, the second cut-out line 312 may be deleted.

Hereinafter, the cut-out groove 310 according to another embodiment of the present invention will be described.

The cut-out groove 310 according to another embodiment of the present invention includes a first cut-out line 311 , a third cut-out line 313 , and a fourth cut-out line 314 .

The first cut-out line 311 extends in the width direction from the base unit 300 formed in the area of the passenger airbag door 200 .

The third cut-out line 313 extends from both ends of the first cut-out line 311 in the base part 300 formed in the area of the passenger-side airbag door 200 toward the edge of the passenger-side airbag door 200, respectively.

That is, in the cut-out groove 310, when the passenger-side airbag is deployed, the passenger-side airbag door 200 is ruptured in an X-shape as a whole due to the third cut-out line 313 .

The fourth cut-out line 314 connects the ends of the third cut-out line 313 extending in the edge direction of the passenger-side airbag door 200, respectively.

That is, the fourth cut-out line 314 extends in the vertical and horizontal directions to form an outer frame of the passenger airbag door 200 .

Therefore, when the passenger seat airbag is deployed, the first incision line 311 and the third incision line 313 are broken by the deployment pressure of the passenger seat airbag, and the first incision line 311 and the third incision line 313 are broken. The front passenger airbag deploys between them.

Accordingly, in the incision groove 310 according to another embodiment of the present invention, the second incision line 312 disposed between the first incision line 311 and the third incision line 313 is deleted, and the first incision line As the 311 and the third incision line 313 are connected to each other, the distance between the pair of third incision inlets 313 is shortened. Foam 600 may be torn relatively cleanly.

In addition, in the cut-out groove 310 according to another embodiment of the present invention, the manufacturing process for forming the second cut-out line 312 is reduced by deleting the second cut-out line 312 of one embodiment, and thus the cut-out groove 310 is cut. The manufacturing cost and manufacturing time of the groove 310 can be significantly reduced.

On the other hand, the cut-out groove 310 may be cracked by repeated external impact caused by driving of a vehicle.

That is, when the crack occurs in the cut-out groove 310 , the crack is damaged in a situation in which the passenger airbag door 200 should not be deployed, and there is a risk that the passenger seat airbag door 200 may be deployed.

Accordingly, the scrim 400 is coupled to the passenger airbag door 200 in order to improve the fixing force of the incision groove 310 .

Referring to FIG. 4 , the extension part 340 extends from the periphery of the passenger seat airbag door 200 in the rear direction.

That is, the extension portion 340 has a rectangular frame shape in cross-section.

As described above, the extension 340 having a rectangular frame shape may have a passenger seat airbag mounted therein.

In addition, the extension portion 340 formed in the shape of a rectangular frame extends with an inner surface inclined by about 2 degrees in the outward direction.

For this reason, the extension part 340 allows the scrim 400 to be easily coupled to the base part 300 .

As shown in FIG. 5, the scrim 400 is made of a fabric material, and a plurality of warp and weft threads cross each other up and down and are entangled in a grid shape to form a net (NET) shape.

The size of the scrim 400 is determined according to the number of warp and weft yarns.

Then, the scrim 400 is insert-injected and coupled to the base unit 300 in the area of the passenger airbag door 200 .

Accordingly, the scrim 400 may firmly fix the base unit 300 in the area where the passenger airbag door 200 is disposed in a situation in which the passenger airbag door 200 is not to be deployed.

That is, the scrim 400 may improve the robustness of the passenger seat airbag door 200 .

A breaking hole 410 is formed in the scrim 400 .

The breaking hole 410 is formed in the scrim 400 , and is formed by breaking the warp and weft threads at positions corresponding to the incision grooves 310 of the base part 300 .

The breaking hole 410 includes a first breaking hole 411 and a second breaking hole 412 .

The first breaking hole 411 is formed in the scrim 400 in the width direction of the passenger airbag door 200 area to correspond to the first cut-out line 311 .

The thickness of the first breaking hole 411 is the same as the length of the second cutting line 312 .

The second breaking holes 412 are respectively formed in the edge direction of the passenger seat airbag door 200 to correspond to the fourth cut-out line 314 .

The second breaking hole 412 is formed in a shape bent in the vertical direction and the horizontal direction in the corner region of the tin airbag door.

The break hole 410 induces breakage of the scrim 400 along the cutout groove 310 when the passenger seat airbag is deployed.

That is, the scrim 400 firmly fixes the deployment of the front passenger airbag door 200 in a situation where the passenger seat airbag should not be deployed, and follows the breaking hole 410 to the passenger airbag door 200 when the passenger seat airbag needs to be deployed. ) to be easily developed.

On the other hand, in one embodiment of the present invention, a separate scoring method is not applied to the base unit 300 and it has been described that only the X-shaped incision groove 310 is formed, but in another embodiment of the present invention, the base unit 300 is not applied. ), a punch-scoring method may be applied along the X-shaped incision groove 310 to form a punch hole 320 in the incision groove 310 .

Hereinafter, the base unit 300 according to another embodiment of the present invention will be described with reference to the drawings.

6 is a partial bottom view showing a bottom surface of a passenger airbag door of a crash pad for a vehicle according to another embodiment of the present invention, and FIG. 7 is a cross-section of a crash pad for a vehicle according to another embodiment of the present invention and a cross-section of a conventional crash pad It is a comparison diagram.

A punch hole 320 is formed in the base unit 300 according to another embodiment of the present invention.

A plurality of punch holes 320 are formed along the incision groove 310 by applying a punch scoring method to the incision groove 310 .

The punch hole 320 allows the scrim 400 to be more easily broken along the incision groove 310 by the deployment pressure according to the deployment of the passenger seat airbag when the passenger seat airbag is deployed due to a car crash.

On the other hand, as shown in (A) of FIG. 7 , in the prior art, when the incision groove 31 is formed by the in-mold method, the convex part 32 is formed on the exterior of the base part 3, but in FIG. As shown in B), punch scoring has the advantage that when the punch hole 320 is formed in the base part 300, the protrusion by the punch hole 320 processing does not protrude to the outside of the base part 300. there is.

This punch scoring is when the punch hole 320 is formed in the base part 300, the exterior of the base part 300 does not protrude to the outside, as shown in (B) of FIG. , it is possible to improve the quality of the appearance of the base unit 300 .

In addition, since the external appearance of the base part 300 does not protrude, the external quality of the base part 300 can be improved and the thickness of the foam 600 laminated on the exterior of the base part 300 can be formed thin. there is.

And, since the appearance of the base unit 300 does not protrude and is formed flat, the flow of the resin is good, so that when insert-injecting the scrim 400 into the base unit 300 , it is advantageous for the scrim 400 to be seated. and can significantly lower the defect rate.

The punch hole 320 includes a first punch line 321 , a second punch line 322 , a third punch line 323 , and a fourth punch line 324 .

Referring to FIG. 6 , the first punch line 321 is formed at a position corresponding to the first cut line 311, and the base part 300 is formed in the area of the passenger airbag door 200 along the first cut line 311. A plurality is formed in the width direction of

The second punch line 322 is formed at a position corresponding to the second cut line 312 and is formed in the vertical direction from both ends of the first punch line 321 along the second cut line 312 .

The third punch line 323 is formed at a position corresponding to the third cut line 313, and along the third cut line 313, from both ends of the second punch line 322 to the edge of the passenger seat airbag door 200. are formed towards each

The fourth punch line 324 is formed at a position corresponding to the fourth cut line 314 and extends vertically and horizontally from the end of the third punch line 323 along the fourth cut line 314, respectively. .

And, the length of the fourth punch line 324 is formed shorter than the length of the third punch line (323).

The punch hole 320 is formed at a position corresponding to the cut-out groove 310, and thus has an X-shape as a whole.

Accordingly, the cut-out groove 310 between the pair of fourth punch lines 324 respectively formed in the left and right directions is fixed, and the cut-out groove 310 between the pair of fourth punch lines 324 respectively formed in the vertical direction is fixed. this is fixed

Specifically, the passenger seat airbag door 200 has a pair of fourth punchlines 324 formed on the right side based on the drawing shown in FIG. 6 and one formed on the left side when the incision groove 310 is broken due to the passenger seat airbag inflating. The cutout groove 310 between the pair of fourth punchlines 324 is fixed, and between the pair of fourth punchlines 324 formed in the upper part and the pair of fourth punchlines 324 formed in the lower part is fixed. The cut-out groove 310 is fixed.

For this reason, when the passenger seat airbag is deployed, the first punch line 321 to the fourth punch line in are broken, and the first punch line 321 , the second punch line 322 , and the third punch line 323 break between the punch lines 323 . The passenger airbag is deployed.

In addition, by eliminating the skin and the scoring process of the foam 600, it is possible to achieve a cost reduction effect.

On the other hand, there is a problem in that it is difficult to apply a trim knife for forming the punch hole 320 by applying the punch scoring method to the point where the incision grooves 310 intersect each other in the base unit 300 .

To this end, in another embodiment of the present invention, a plurality of through-holes 330 are formed at a point where the plurality of cut-out grooves 310 intersect with each other.

Here, the points at which the plurality of cut-out grooves 310 intersect each other are a point at which the first cut-out line 311 and the second cut-out line 312 are connected, and a second cut-out line 312 and a third cut line ( It refers to a point where 313 is connected and a point where the third cut-out line 313 and the fourth cut-out line 314 are connected.

In addition, the intersections of the plurality of cut-out grooves 310 are formed in a curved shape.

Hereinafter, a base unit according to another embodiment of the present invention will be described with reference to the drawings.

8 is a partial bottom view showing the bottom surface of the passenger airbag door of a crash pad for a vehicle according to another embodiment of the present invention, FIG. 9 is an enlarged view of part “A” shown in FIG. 8, and FIG. 10 is FIG. It is an enlarged view of part “B” shown in Fig. 8.

Referring to FIG. 8 , a plurality of through-holes 330 are formed at a point where the plurality of incision grooves 310 intersect with each other, and a punch is punched through punch scoring in the remaining sections except for the plurality of through-holes 330 . A hole 320 is formed.

The plurality of through-holes 330 include a first through-hole 331 , a second through-hole 332 , and a third through-hole 333 .

Referring to FIG. 9 , the first through-hole 331 is formed at a point where the first cut-out line 311 and the second cut-out line 312 are connected.

The first through hole 331 has a distance L1 between its central axis C1 and one surface of the first incision line 311 is about 2.8mm to 3.2mm apart, and the distance L2 between the other surfaces is about 2.8mm to about 2.8mm to It is formed at a position spaced 3.2mm apart.

The second through-hole 332 is formed at a point where the second cut-out line 312 and the third cut-out line 313 are connected.

The distance L3 between the central axis C2 of the second through hole 332 and one surface of the second incision line 312 and the third incision line 313 is about 2.8 mm to 3.2 mm, and between the other surfaces The distance L4 is formed at a position spaced apart by about 2.8 mm to 3.2 mm.

Referring to FIG. 10 , the third through-hole 333 is formed at a point where the third cut-out line 313 and the fourth cut-out line 314 are connected.

The distance (L5) between the central axis (C3) of the third through hole 333 and one surface of the fourth incision line 314 is about 2.8 mm to 3.2 mm, and the distance L6 between the other surfaces is about 3.8 It is formed at positions spaced apart from mm to 4.2 mm.

Accordingly, as shown in FIG. 11 , the first through hole 331 is formed between the first punch line 321 and the second punch line 322 , and the second through hole 332 is formed between the second punch line ( It is formed between the 322 and the third punch line 323 , and the third through hole 333 is formed between the third punch line 323 and the fourth punch line 324 .

Accordingly, the through-hole 330 can obtain the same effect as the punch hole 320 at the point where the cut-out grooves 310 intersect each other in the base unit 300 .

That is, when the passenger seat airbag is deployed, the passenger seat airbag door 200 may be more easily broken by the punch hole 320 and the through hole 330 .

The plurality of through-holes 330 are applied to the intersection of the trim knife for punch scoring in the modified X-shape and H-shape, as well as the incision groove 310 made of the X-shaped shape of the present invention. In the remaining section, the punch hole 320 may be formed by applying punch scoring.

On the other hand, when the punch hole 320 formed through the punch scoring is formed through the through hole 330 , the resin flow is not smooth during injection of the crash pad 100 , so the defect rate of the base unit 300 increases. And, since it is difficult to seat the scrim 400, the through hole 330 is preferably formed only at the point where the plurality of incision grooves 310 intersect.

In addition, each of the plurality of through-holes 330 and the plurality of punch lines has a width of about 1 mm.

Referring back to FIG. 2 , the skin part 500 according to an embodiment of the present invention is disposed on the base part 300 to expose the external appearance, and has a curved surface to correspond to the external appearance of the base part 300 , It is formed in a non-planar three-dimensional shape having a curved surface, an uneven surface, and the like.

Due to this, the skin unit 500 may improve the quality of the interior exterior of the vehicle.

The skin part 500 smoothes the surface of the crash pad 100 unlike the base part 300 having rigidity so as to protect passengers in the vehicle interior from external impacts in the event of a vehicle collision or rollover accident.

For this reason, the skin part 500 may be easily torn by the breaking force of the cut-out groove 310 of the passenger-side airbag door 200 when the passenger-side airbag is deployed.

And, the skin part 500 is formed without going through a skin scoring process.

The skin part 500 is easily torn by the incision groove 310 of the base part 300 when the passenger seat airbag is deployed.

Through this, the process is simplified, costs such as material and parts cost are reduced, and the thickness of the skin part 500 can be formed to be thin, so that the weight of the crash pad 100 can be reduced.

The foam 600 is an injection of a foaming undiluted solution (foam, foam) between the base unit 300 and the skin unit 500, and absorbs the shock in the event of a vehicle collision or overturning accident to minimize the force transmitted to the passenger. to reduce damage such as head injuries.

Foam 600 is made of 7mm to 8mm or 4mm to 5mm, and preferably has a thickness of 4mm to 5mm.

On the other hand, when punch scoring is applied to the cut-out groove 310 of the base part 300 , the exterior of the base part 300 does not protrude, so that a separate curved surface is not formed in the foam 600 as well.

Due to this, the thickness of the foam 600 can be formed to be thin, so that the weight of the crash pad 100 can be reduced.

As described above, according to the present invention, the passenger seat airbag is deployed from the passenger seat airbag door 200 of the crash pad 100 to the outside due to the breakage of the base unit 300 , the foam 600 , and the skin unit 500 . protects the passenger in the passenger seat of

Hereinafter, a method of manufacturing a crash pad according to another embodiment of the present invention will be described with reference to the drawings.

12 is a flowchart illustrating a method of manufacturing a crash pad for a vehicle according to another embodiment of the present invention.

Referring to FIG. 12 , first, the scrim 400 is insert-injected into the base unit 300 of the passenger airbag door 200 region of the crash pad 100 ( S110 ).

Accordingly, the scrim 400 improves the robustness of the passenger airbag door 200 .

A breaking hole 410 is formed in the scrim 400 at a position corresponding to the first incision line 311 and the fourth incision line 314 .

Before insert injection into the base unit 300 , the break hole 410 is pre-breaked at a position corresponding to a portion of the incision groove 310 , and then insert-injected into the base unit 300 .

A cutout groove 310 is formed in the base part 300 of the passenger seat airbag door 200 region (S120).

The incision groove 310 includes a first incision line 311 extending in the width direction from the base unit 300 and a second incision line 312 extending in the vertical direction from both ends of the first incision line 311 and , a third incision line 313 extending from both ends of the second incision line 312 toward the edge of the passenger airbag door 200, and a fourth incision line connecting the ends of the third incision line 313, respectively (314).

The cut-out groove 310 is formed in an X-shape as a whole due to the third cut-out line 313 .

Therefore, the X-shaped incision groove 310 formed in the base unit 300 is formed by the shear force caused by the damage of the airbag door without a separate scoring process on the skin unit 500 and the foam 600 . ) and the foam 600 to be easily torn.

Then, after the base part 300 is seated on the lower mold jig, it is fixed (S130).

Then, in the base unit 300 fixed to the lower type jig, an upper type jig equipped with a trim knife is disposed on the upper portion of the passenger airbag door 200 region (S140).

Next, the trim knife punches along the cutout groove 310 formed in the passenger airbag door 200 to form a plurality of punch holes 320 at predetermined positions (S150).

When a punch scoring that forms a punch hole 320 in the incision groove 310 by punching a trim knife along the incision groove 310 as described above is applied, a protrusion is formed on the exterior of the base part 300 it can be prevented

Then, the skin part 500 is mounted on the upper part of the foam mold and the base part 300 is mounted on the lower part (S160).

Here, a space equal to the thickness of the foam 600 is formed between the skin part 500 and the base part 300 .

And, between the skin part 500 and the base part 300, the foam 600 is formed to complete the crash pad 100 of the present invention (S170).

The punch scoring according to another embodiment of the present invention can reduce costs compared to conventional scoring methods such as milling and laser scoring, and by shortening the processing time, the passenger seat airbag door 200 of the crash pad 100 The production time can be significantly shortened.

For this reason, the punch scoring method according to another embodiment of the present invention can be applied to an injection-type or leather-wrapped type crash pad in addition to the foam-type scrim 400 to improve the appearance quality and reduce costs.

Hereinafter, a method of manufacturing a crash pad according to another embodiment of the present invention will be described with reference to the drawings.

13 is a flowchart illustrating a method of manufacturing a crash pad for a vehicle according to another embodiment of the present invention.

Referring to FIG. 13 , first, the scrim 400 is insert-injected into the base unit 300 of the passenger airbag door 200 region of the crash pad 100 ( S210 ).

Accordingly, the scrim 400 improves the robustness of the passenger airbag door 200 .

A breaking hole 410 is formed in the scrim 400 at a position corresponding to the first incision line 311 and the fourth incision line 314 .

Before insert injection into the base unit 300 , the break hole 410 is pre-breaked at a position corresponding to a portion of the incision groove 310 , and then insert-injected into the base unit 300 .

A cutout groove 310 is formed in the base part 300 of the passenger seat airbag door 200 region (S220).

The incision groove 310 includes a first incision line 311 extending in the width direction from the base unit 300 and a second incision line 312 extending in the vertical direction from both ends of the first incision line 311 and , a third incision line 313 extending from both ends of the second incision line 312 toward the edge of the passenger airbag door 200, and a fourth incision line connecting the ends of the third incision line 313, respectively (314).

The cut-out groove 310 is formed in an X-shape as a whole due to the third cut-out line 313 .

Therefore, the X-shaped incision groove 310 formed in the base unit 300 is formed by the shear force caused by the damage of the airbag door without a separate scoring process on the skin unit 500 and the foam 600 . ) and the foam 600 to be easily torn.

Then, after the base part 300 is seated on the lower mold jig, it is fixed (S230).

In addition, in the base part 300 fixed to the lower mold jig, an upper mold jig equipped with a through hole 330 forming device is disposed on the upper part of the passenger's airbag door 200 region ( S240 ).

Next, through-holes 330 are respectively formed at points where the plurality of cut-out grooves 310 intersect each other ( S250 ).

Specifically, the device for forming the through hole 330 includes a point where the first incision line 311 and the second incision line 312 are connected in the plurality of incision lines, and the second incision line 312 and the third incision line ( The first through-holes 331 to 333 are respectively formed through the point where the 313 is connected and the point where the third cut-out line 313 and the fourth cut-out line 314 are connected.

In particular, the first through hole 331 is formed at a position whose central axis C1 is spaced apart from one surface of the first incision line 311 by about 2.8 mm to 3.2 mm, and spaced apart from the other surface by about 2.8 mm to 3.2 mm. .

And, the second through-hole 332 has its central axis C2 spaced apart from one surface of the second incision line 312 and the third incision line 313 by about 2.8 mm to 3.2 mm, and from about 2.8 mm to about 2.8 mm from the other surface. It is formed at a position spaced 3.2mm apart.

And, the third through hole 333 is formed at a position whose central axis C3 is spaced apart from one surface of the fourth incision line 314 by about 2.8 mm to 3.2 mm, and spaced apart from the other surface by about 3.8 mm to 4.2 mm. .

For this reason, the through-hole 330 forming apparatus for forming the first through-hole 331 to the third through-hole 333 can be easily inserted at a point where the plurality of cut-out grooves 310 intersect with each other.

Next, after removing the upper jig on which the through-hole 330 forming device is mounted, the upper jig equipped with a trim knife is disposed on the upper portion of the passenger seat airbag door 200 area in the crash pad 100 fixed to the lower jig (S260) do.

Next, the trim knife punches along the cutout groove 310 formed in the passenger airbag door 200 to form a plurality of punch holes 320 at predetermined positions (S270).

Specifically, a first through hole 331 is formed between the punch hole 320 and the first punch line 321 and the second plate line, and the second punch line 322 and the second punch line 322 forming the punch hole 320 are formed. A second through hole 332 is formed between the 3 punch lines 323 , and a third through hole 333 is formed between the third punch line 323 and the fourth punch line 324 forming the punch hole 320 . this is formed

When a punch scoring that forms a punch hole 320 in the incision groove 310 by punching a trim knife along the incision groove 310 as described above is applied, a protrusion is formed on the exterior of the base part 300 can prevent

Then, the skin part 500 is mounted on the upper part of the foam mold and the base part 300 is mounted on the lower part (S280).

Here, a space equal to the thickness of the foam 600 is formed between the skin part 500 and the base part 300 .

And, between the skin part 500 and the base part 300, the foam 600 is formed to complete the crash pad 100 of the present invention (S290).

As such, the embodiments disclosed in this specification should be considered from an exemplary point of view for description rather than a limiting point of view. The scope of the present invention is indicated in the claims rather than the foregoing description, and all differences within the scope equivalent thereto should be construed as being included in the present invention.

100: crash pad 110: button insertion hole
120: vent insertion hole 200: air bag door
300: base unit 310: incision groove
311: first incision line 312: second incision line
313: third incision line 314: fourth incision line
320: punch hole 321: first punch line
322: second punch line 323: third punch line
324: fourth punch line 330: through hole
331: first through-hole 332: second through-hole
333: third through-hole 340: extension
400: scrim 410: breaking hole
411: first breaking hole 412: second breaking hole
500: skin unit 600: foam foam

Claims (10)

A crash pad in which a passenger airbag door is integrally coupled to which a passenger airbag is installed inside the passenger seat direction, the crash pad comprising:
a base unit constituting the skeleton;
a scrim (SCRIM) coupled to the inside of the base part of the passenger seat airbag door area by an insert injection method;
a skin part disposed on the base part and having one surface exposed to the outside; and
It includes a foam disposed between the base part and the skin part,
In the base part, an X-shaped punch hole is formed on the rear surface of the passenger seat airbag door area by performing punch scoring,
A crash pad for a vehicle in which the area in which the punch hole is formed is flat.
According to claim 1, wherein the punch hole,
A crash pad for a vehicle that causes the scrim to break when the front passenger airbag is deployed.
According to claim 1, wherein the punch hole,
a plurality of first punch lines formed in a width direction of the base portion formed in the passenger airbag door region;
a second punch line formed in a vertical direction from both ends of the first punch line;
a third punch line formed from both ends of the second punch line toward a corner of the passenger airbag door; and
A crash pad for a vehicle including a fourth punchline extending in a vertical direction and a horizontal direction from an end of the third punchline, respectively.
The method of claim 3, wherein when the punch hole is broken,
A crash pad for a vehicle in which the cut-out grooves between the pair of fourth punch lines respectively formed in left and right directions are fixed, and the cut-out grooves between the pair of fourth punch lines respectively formed in the up-down direction are fixed.
5. The method of claim 4,
A crash pad for a vehicle in which a cutout groove is formed at a position corresponding to the breaking hole in the rear of the passenger seat airbag door area in the base unit.
According to claim 5, wherein the cut-out groove,
a first cut-out line extending in a width direction of the base portion formed in the passenger seat airbag door region;
a second incision line extending in the vertical direction from both ends of the first incision line;
a third cut-out line extending from both ends of the second cut-out line toward a corner of the passenger-side airbag door, respectively; and
and a fourth cut-out line extending in a vertical direction and a horizontal direction from an end of the third cut-out line and connecting the ends of the plurality of third cut-out lines, respectively.
7. The method of claim 6,
The first punch line is formed along the first incision line,
The second punch line is formed along the second cut line,
The third punch line is formed along the third incision line,
The fourth punch line is a crash pad for a vehicle formed along the fourth incision line.
According to claim 5, wherein the cut-out groove,
A crash pad for a vehicle formed on a surface of the base unit in a direction in which a passenger airbag is disposed in the passenger airbag door region.
A method for manufacturing a crash pad in which a passenger airbag door is integrally coupled with a passenger seat airbag installed inside the passenger seat direction, the crash pad manufacturing method comprising:
insert-injecting the scrim into the base part constituting the skeleton;
forming a plurality of incision grooves in the base portion of the passenger seat airbag door area;
seating and fixing the base part on the lower mold jig;
disposing an upper type jig equipped with a trim knife in an area of the passenger airbag door above the lower type jig to which the base part is fixed;
forming a plurality of punch holes by performing punch scoring in the incision groove;
Mounting the skin part on the upper part of the foam mold and mounting the base part on the lower part;
A method of manufacturing a crash pad for a vehicle comprising the step of forming a foam between the skin part and the base part.
10. The method of claim 9,
The thickness of the foam is a method of manufacturing a crash pad for a vehicle consisting of 4mm to 5mm.

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