JP2019147358A - Foam molding mold and manufacturing method of sheet pad - Google Patents

Abstract

To provide a foam molding mold capable of making a magnetic material become difficult to scatter on actuation of an air bag apparatus, and a manufacturing method of a sheet pad using the same.SOLUTION: A foam molding mold 50 contains a pad main body 11 assembled with an accommodation recess 20 for accommodation of an air bag apparatus 90 and a reinforcement face member 30 placed on an inner face of the accommodation recess 20, wherein a part of the pad main body 11 overlapping with an opening 31 contains a magnet 65 and an engaging projection 60 which is employed for foam molding of a sheet pad 10 to be torn to open on actuation of the air bag apparatus 90 and for stacking and fixing a reinforcement face material 39 on an outer face of a side projection 56 for molding the accommodation recess 20 with a tip of the side projection 56 being inserted in the opening 31. The engaging projection 60 is provided at the tip of the side projection 56 and engages with an engaging hole 32 in the vicinity of the opening 31 of the reinforcement face member 30. The magnet 65 is magnetically adsorbed with a magnetic material 33 provided at a part of the reinforcement face member 30 and apart from the opening 31.SELECTED DRAWING: Figure 6

Description

  The present invention has a pad main body provided with a housing recess for housing an airbag device, and a reinforcing face material laid on the inner surface of the housing recessed portion, and an opening formed in the reinforcing face material of the pad body. The present invention relates to a method of manufacturing a seat pad configured to be cleaved when an airbag device is operated, and a foaming mold used therefor.

  In the method of manufacturing a seat pad disclosed in Patent Document 1, a molding protrusion for forming an accommodation recess in a foaming mold is inserted into an opening of a reinforcing face material, and the reinforcing face material is overlaid on the outer surface of the forming protrusion. And fix. Next, the pad main body is molded by foaming the resin in the foaming mold, and the reinforcing face material is integrally fixed to the pad main body.

  Further, as a method of fixing the reinforcing face material to the inner surface of the foam molding die, a magnet is provided on the inner surface of the foam molding die, and a magnetic body that adsorbs the magnet is provided on the reinforcing face material. A method of fixing a reinforcing face material to a foaming mold by magnet adsorption is known (see, for example, Patent Document 2).

Japanese Patent No. 4541778 (paragraphs [0026] to [0027], FIGS. 5 and 7 to 8) JP 2001-252930 A (paragraph [0019], FIG. 1)

  By the way, when manufacturing the seat pad which accommodates an airbag apparatus, in the method of fixing the reinforcing face material to the foaming mold by magnetic adsorption, the foamed resin enters between the reinforcing face material and the foaming mold. In order to prevent this, it is necessary to dispose the magnetic body of the reinforcing face material in the vicinity of the opening. For this reason, the magnetic body may be scattered when the airbag device is activated.

  The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a foaming mold capable of making it difficult for a magnetic material to scatter during operation of an airbag device, and a method of manufacturing a seat pad using the same. And

  The invention of claim 1 made to achieve the above object has a pad body provided with an accommodation recess for accommodating an airbag device, and a reinforcing face material laid on the inner surface of the accommodation recess, A portion of the pad main body that overlaps with the opening provided in the reinforcing face material is a foam molding die for foam molding of a seat pad that is torn during operation of the airbag device, and the housing recess is molded. And a fixing means for fixing the reinforcing face material on the outer surface of the molding protrusion in a state where the tip of the molding protrusion is inserted into the opening. Is provided at the tip of the forming protrusion, and the locking protrusion that locks into the engagement hole formed in the vicinity of the opening in the reinforcing face material, Magnetic adsorption with the magnetic material provided in the part away from the opening Having a magnet, a, a foam mold.

  According to a second aspect of the present invention, the molding protrusion protrudes along the opening and closing direction of the foaming mold, and a surface of the locking protrusion that faces the proximal end side of the molding protrusion is directed to the proximal end side. The foaming mold according to claim 1, wherein the foaming mold has an inclined surface that gradually decreases a protruding amount of the locking protrusion as it goes.

  The invention of claim 3 has an upper mold, a lower mold, and a core addressed to the upper mold, and faces the outer edge of the core with a space from the lower side to the upper mold. An outer edge facing portion is provided, the molding protrusion protrudes downward from the outer edge facing portion, and the magnet includes one of the outer edge facing portions disposed on a surface facing the upper mold. A foam molding die according to claim 1 or 2.

  According to a fourth aspect of the present invention, there is provided a seat pad manufacturing method using the foaming mold according to any one of the first to third aspects, wherein an engagement hole penetrating the vicinity of the opening is formed in the reinforcing face material. In order to fix the reinforcing face material to the forming projection, the reinforcing face material is made to engage the engaging protrusion of the foaming mold in the engagement hole of the reinforcing face material. A method of manufacturing a seat pad, wherein the magnetic body and the magnet of the foaming mold are magnetically attracted to each other.

[Inventions of Claims 1 and 4]
In the present invention, when the reinforcing face material is attached to the foaming mold, the locking protrusion provided at the tip of the forming protrusion is in the engagement hole formed in the vicinity of the opening in the reinforcing face material. Lock. Moreover, the magnet provided in the foaming mold is magnetically attracted to the magnetic body provided in the portion of the reinforcing face member that is away from the opening. Thereby, it becomes possible to reduce the number of magnetic bodies arrange | positioned near the part opened by an airbag apparatus among seat pads, and scattering of a magnetic body when an airbag apparatus act | operates is suppressed.

  According to a fourth aspect of the present invention, the magnetic material of the reinforcing face material is magnetically attracted to the magnet while the engaging face of the reinforcing face material is hooked on the locking projection and tension is applied to the reinforcing face material. Is possible. As a result, the reinforcing face material can be brought into close contact with the outer surface of the molding protrusion, and the foamed resin material is prevented from entering between the molding protrusion and the reinforcing face material.

[Invention of claim 2]
In the present invention, the surface of the locking protrusion that faces the base end side of the molding protrusion is an inclined surface that gradually decreases the protrusion amount of the locking protrusion as it goes toward the base end side. The pad can be smoothly removed from the foaming mold.

[Invention of claim 3]
In the present invention, the magnet is disposed on the surface facing the upper mold in the outer edge facing portion of the core. As a result, the reinforcing face material is wound from the lower side of the core to the upper side through the side, so that the adhesion between the reinforcing face material and the molding protrusion can be improved.

Perspective view of seat pad Flat cross section of seat pad (A) Enlarged plan sectional view around the accommodation recess of the seat pad, (B) Plan sectional view of the seat pad when the airbag device is activated Perspective view of an open mold mold Front cross-sectional view of a closed mold mold Front sectional view of the molding protrusion to which the reinforcing face material is attached Enlarged front sectional view around the molding protrusion when the foam mold is closed Enlarged front sectional view around the molding protrusion during foam molding of the pad body Front sectional view of the foam molded pad body Front cross-sectional view of the upper mold and core and pad body of the foam mold in the open state Enlarged front sectional view around the locking projection of the pad body removed from the foam mold Front sectional view of locking projection according to another embodiment

  As shown in FIGS. 1 and 2, the seat pad 10 according to the present embodiment is a back pad used for a backrest portion 92 of a vehicle seat 90. The backrest 92 is formed by covering the seat pad 10 with a cover 93.

  As shown in FIG. 2, the seat pad 10 includes a pad main body 11 made of foamed resin, and a reinforcing face member 30 integrated on a surface facing the rear side of the pad main body 11. The reinforcing face material 30 is made of, for example, a nonwoven fabric.

  The pad body 11 includes a base 12 that covers a back frame (not shown) of the vehicle seat 90 from the front side, a rear protrusion 13 that protrudes rearward from the outer edge of the base 12, and a rear end portion of the rear protrusion 13. And a flange portion 14 projecting inward from. Specifically, the base 12 has a vertically long rectangular shape when viewed from the front side. The rear protrusion 13 and the flange portion 14 are continuously formed along the upper side portion and the left and right side portions of the base 12. A space surrounded by the base 12, the rear protrusion 13 and the flange portion 14 serves as a receiving recess 15 for receiving the outer edge portion of the back frame.

  The base 12 includes a main receiving portion 12A that is disposed on the left and right center side of the base 12 and receives the back of the seated person, and a pair of side receiving portions 12B and 12B that are disposed on both left and right sides of the main receiving portion 12A. ing. The main receiving portion 12A is formed flat in the front-rear direction, and the side receiving portion 12B is formed so as to bulge forward with respect to the main receiving portion 12A. A side groove 16 extending in the vertical direction is formed on the rear surface of the side receiving portion 12B. The rear protrusion 13 is connected to the groove side wall of the side groove 16, and the side groove 16 communicates with the receiving recess 15 described above. The left and right sides of the back frame engage with the side groove 16.

  A housing recess 20 for housing the airbag device 90 is formed in the side groove 16 provided in the side receiving portion 12B on the side close to the vehicle door (in the example of FIG. 2, the right side receiving portion 12B). Yes. Specifically, the airbag device 90 includes a side receiving portion 12B on the side close to the vehicle door, a portion of the rear protrusion 13 protruding rearward from the side receiving portion 12B, and the side receiving portion of the flange portion 14. A portion of the airbag device 90 is accommodated in the accommodating recess 20 in a space surrounded by the portion disposed on the rear side of the portion 12B.

  A stepped portion 23 is provided on the inner surface of the housing recess 20 to narrow the front side in a stepped shape. The wide portion 20 </ b> A on the rear side of the stepped portion 23 in the housing recess 20 receives the airbag device 90. The narrow part 20 </ b> B on the front side of the step part 23 in the housing recess 20 is arranged close to the vehicle door. Specifically, the step portion 23 is formed on a surface facing the vehicle door side of the inner surface of the housing recess 20, and the narrow portion 20 </ b> B extends from the portion of the wide portion 20 </ b> A closer to the vehicle door to the front side. It is extended. In the example of FIG. 2, the front end wall portion 21 </ b> F arranged on the front side of the narrow portion 20 </ b> B among the concave portion constituting walls 21 constituting the accommodating concave portion 20 is the thinnest among the concave portion constituting walls 21.

  As shown in FIG. 2, the reinforcing face member 30 includes a rear surface of the main receiving portion 12 </ b> A in the base 12 and an inner surface of the side groove 16, and a surface of the rear protrusion 13 and the flange portion 14 that faces the receiving recess 15 (that is, And the inner surface of the receiving recess 15. The reinforcing face material 30 may be composed of a single nonwoven fabric, or may be composed of a plurality of nonwoven fabrics joined together.

  As shown in FIG. 3A, an opening extending linearly in the vertical direction is formed in the portion of the reinforcing face member 30 laid on the inner surface of the housing recess 20 (that is, the inner surface of the recess-constituting wall 21). 31 is formed. The opening 31 is overlaid on the front end wall 21 </ b> F of the recess-constituting wall 21.

  An engagement hole 32 is formed through the reinforcing face member 30 in the vicinity of the opening 31 (specifically, the opening edge of the opening 31). A plurality of engagement holes 32 are provided so as to be aligned along the extending direction of the opening 31. In addition, a plurality of magnetic bodies 33 are provided in a portion of the reinforcing face member 30 away from the opening 31. That is, the magnetic body 33 is disposed at a position farther from the opening 31 than the engagement hole 32.

  As shown in FIG. 3B, when the airbag device 90 is activated, the airbag 91 stored in the airbag device 90 is inflated to the front side. Here, the front end wall portion 21 </ b> F of the recess-constituting wall 21 constituting the housing recess 20 is not reinforced by the reinforcing face material 30 by overlapping with the opening 31. In addition, the front end wall portion 21 </ b> F is the thinnest in the recess constituting wall 21. As a result, when the airbag 91 is inflated, the front end wall portion 21F of the recess-constituting wall 21 is preferentially cleaved, and the airbag 91 that protrudes forward from the pad body 11 is disposed between the vehicle door and the seated person. .

  4 and 5 show a foam molding die 50 for foam-molding the seat pad 10. The foaming mold 50 includes an upper mold 51, a lower mold 52, and a core 53 attached to the upper mold 51. In the foam molding die 50, the pad body 11 is foam-molded with the reinforcing face material 30 attached to the core 53. The pad body 11 is molded with its front surface facing downward.

  As shown in FIG. 4, the upper mold 51 and the lower mold 52 have a rectangular shape in plan view, and the short sides are connected by a hinge. The lower mold 52 has a container shape having a molding recess 52A opened on the upper side, and the front surface of the pad body 11 is molded by the inner surface of the molding recess 52A. The upper mold 51 is formed in a lid shape that closes the molding recess 52A. As shown in FIG. 5, a central concave portion 51 </ b> A for accommodating the central protrusion 54 </ b> T of the core 53 is formed in the lower surface central portion of the upper mold 51.

  As shown in FIG. 5, the core 53 has a main board 54 that is flat in the vertical direction, and a central protrusion 54 </ b> T that protrudes from the center of the upper surface of the main board 54. Then, the core 53 is positioned with respect to the upper mold 51 by engaging the central protrusion 54 </ b> T with the central recess 51 </ b> A of the upper mold 51.

  As shown in FIG. 4, the main board 54 is formed in a rectangular shape in plan view, and forms the rear surface of the base 12 in the pad main body 11. The short side of the main board 54 is arranged along the short sides of the upper mold 51 and the lower mold 52.

  As shown in FIG. 5, a U-shaped gap is formed between the main board 54 and the inner peripheral surface of the molding recess 52 </ b> A in the lower mold 52, and the rearward projection of the pad main body 11 is formed by the gap. Part 13 (see FIG. 2) is formed. Further, the height of the central protrusion 54T of the core 53 is larger than the depth of the central recess 51A of the upper mold 51, and a gap is formed between the outer edge of the main board 54 and the upper mold 51. A gap forming portion 55 (corresponding to the “outer edge facing portion” of the present invention) is provided. And the flange part 14 (refer FIG. 2) of the pad main body 11 is shape | molded by the clearance gap between the clearance gap formation part 55 and the upper mold | type 51. FIG. From another viewpoint, the gap forming portion 55 of the main board 54 forms the receiving recess 15 (see FIG. 2) in the pad main body 11.

  As shown in FIGS. 4 and 5, side protrusions 56 for forming the side grooves 16 in the base 12 of the pad main body 11 protrude downward from both ends of the main board 54 in the short side direction. Note that the side protrusions 56 extend along the long side direction of the main board 54.

  As shown in FIG. 5, the side protrusion 56 (corresponding to the “forming protrusion” of the present invention) disposed on one side (right side in FIG. 5) in the short side direction of the main board 54 is provided. A stepped portion 57 is formed to narrow the front end side of the side protrusion 56 in a stepped shape. A wide portion 20A of the housing recess 20 in the pad body 11 is formed by the wide portion 56A on the base end side of the step portion 57 of the side protrusion 56, and the width of the side protrusion 56 on the distal end side of the step portion 57 is narrower. The narrow portion 20B of the housing recess 20 is formed by the portion 56B. Specifically, the stepped portion 57 is formed in a portion of the side ridge 56 facing the other side in the short side direction of the main board 54 (a portion facing the left side in FIG. 5). The narrow portion 56 </ b> B is arranged close to one side of the main board 54 in the short side direction.

  The locking protrusion 60 protrudes outward in the width direction from the narrow portion 56B of the side protrusion 56. As shown in FIG. 4, a plurality of locking protrusions 60 are provided along the extending direction of the side protrusions 56, with two sets protruding on one side and the other side in the width direction as one set. Yes. Note that the protruding amount of the locking protrusion 60 is slightly larger than the thickness of the reinforcing face member 30.

  As shown in the enlarged view of FIG. 5, the surface of the locking protrusion 60 that faces the distal end side of the side protrusion 56 is a vertical surface 61 that is disposed substantially perpendicular to the protruding direction of the side protrusion 56. It has become. In addition, the surface of the locking protrusion 60 that faces the base end side of the side protrusion 56 is an inclined surface that is inclined so as to reduce the protruding amount of the locking protrusion 60 toward the base end side of the side protrusion 56. 62.

  Specifically, as shown in the enlarged view of FIG. 4, the locking projection 60 is formed in a pentahedron shape having a trapezoidal bottom portion 60 </ b> B and a linear top portion 60 </ b> T. The bottom 60B is formed in an isosceles trapezoidal shape in which the front end side of the side protrusion 56 is wide, and the vertical surface 61 and the inclined surface 62 of the locking protrusion 60 are on the front end side (that is, the locking protrusion 60 (that is, It is formed in a trapezoidal shape that becomes narrower toward the top 60T).

  As shown in FIG. 5, a plurality of magnets 65 that are coupled to the magnetic body 33 of the reinforcing face member 30 are provided on the outer surface of the core 53. The plurality of magnets 65 are arranged so as to avoid the narrow portion 56B of the side protrusion 56, and specifically, the main surface of the gap forming portion 55 that faces the upper mold 51 and the wide portion 56A of the side protrusion 56 It is provided on the surface facing the center side of the board 54, the lower surface of the central part of the main board 54, and the like.

  In the present embodiment, the locking protrusion 60 and the magnet 65 constitute the “fixing means” of the present invention.

  The seat pad 10 is manufactured as follows. First, a reinforcing face member 30 having an opening 31, an engagement hole 32, and a magnetic body 33 is prepared. The engagement hole 32 is formed in the vicinity of the opening 31 of the reinforcing face member 30, and the magnetic body 33 is provided at a plurality of predetermined positions away from the opening 31 in the reinforcing face member 30. Yes.

  Next, as shown in FIG. 6, the reinforcing face member 30 is attached to the core 53 of the foamed mold 50 that has been opened. At this time, the core 53 is away from the upper mold 51.

  Details of attachment of the reinforcing face member 30 are as follows. That is, first, the reinforcing face member 30 is passed through the opening 31 of the reinforcing face member 30 while passing the tip of the side protrusion 56 (specifically, the narrow portion 56B) on one side in the short side direction of the core 53. Cover the side ridges 56. Next, the plurality of locking protrusions 60 of the narrow portion 56 </ b> B of the side protrusion 56 are passed through the plurality of engagement holes 32 of the reinforcing face material 30. The plurality of magnetic bodies 33 of the reinforcing face member 30 are magnetically attracted to the plurality of magnets 65 of the core 53 while the plurality of locking protrusions 60 are hooked in the plurality of engagement holes 32. At this time, the reinforcing face member 30 is brought into close contact with the outer surface of the side protrusion 56 by pulling a portion away from the opening 31 of the reinforcing face member 30 to give tension to the reinforcing face member 30. Is possible. In particular, as shown by an arrow in FIG. 6, when the magnetic body 33 is attracted to the magnet 65 provided on the surface facing the upper mold 51 in the gap forming portion 55 of the core 53, the reinforcing face material Since 30 is wound from the lower side of the core 53 to the upper side through the side, the adhesion between the reinforcing face material 30 and the side protrusions 56 can be improved.

  When the attachment of the reinforcing face member 30 to the core 53 is completed, the core 53 is attached to the upper mold 51. Next, the foamed resin raw material 80 is injected into the molding recess 52A of the lower mold 52, and the foam molding die 50 is closed (see FIG. 7). Then, the foamed resin raw material 80 is foamed in the foaming mold 50. Then, the pad main body 11 integrated with the reinforcing face material 30 is molded in the foam molding die 50 (see FIG. 9).

  By the way, in this embodiment, since the step part 57 is provided in the side protrusion 56 on one side in the short side direction of the core 53, when the reinforcing face material 30 is attached to the core 53, There is a problem that the face material 30 is lifted from the stepped portion 57 and the reinforcing face material 30 is difficult to adhere to the side protrusion 56. This problem is solved by foaming the foamed resin raw material 80. That is, as shown in FIG. 8, when the foamed resin raw material 80 expands and expands, the reinforcing face material 30 is pressed against the stepped portion 57 and is in close contact with the side protrusion 56. Here, the portion of the reinforcing face member 30 that is away from the opening 31 is fixed to the core 53 by the magnetic attraction of the magnetic body 33 and the magnet 65, so that the reinforcing face member 30 is pressed against the stepped portion 57. Even if an excessive tension is applied to the reinforcing face member 30 at this time, the position of the magnetic body 33 is shifted with respect to the magnet 65, so that the reinforcing face member 30 is prevented from being damaged.

  When the pad main body 11 is molded, the foam molding die 50 is opened, and the seat pad 10 in which the pad main body 11 and the reinforcing face material 30 are integrated is removed from the foam molding die 50. Thus, the seat pad 10 is completed.

  In detail, when the foaming mold 50 is opened, the pad main body 11 is separated from the lower mold 52 together with the core 53 by the flange portion 14 being caught by the gap forming portion 55 of the core 53. (See FIG. 10). In addition, the pad body 11 is separated from the upper mold 51 by removing the core 53 from the upper mold 51. Then, the pad main body 11 is removed from the core 53. Here, when the pad main body 11 is removed from the core 53, the locking protrusion 60 may be undercut. In the present embodiment, as shown in FIG. The surface facing the base end side of the side protrusion 56 is an inclined surface 62 that is inclined so as to reduce the protruding amount of the locking protrusion 60 toward the base end side of the side protrusion 56, so that elasticity is improved. The provided pad body 11 can be smoothly removed from the core 53.

  In the foam molding die 50 of the present embodiment, when the reinforcing face member 30 is attached to the core 53, the locking protrusion 60 provided at the tip end portion (the narrow portion 56 </ b> B) of the side protrusion 56 in the core 53. However, the reinforcing face member 30 is locked in the engagement hole 32 formed in the vicinity of the opening 31. Further, the magnet 65 provided at a predetermined location of the core 53 is magnetically attracted to the magnetic body 33 provided in a portion of the reinforcing face member 30 away from the opening 31. Thereby, it becomes possible to reduce the number of the magnetic bodies 33 arrange | positioned in the seat pad 10 near the part cleaved by the airbag apparatus 90, and scattering of the magnetic body 33 when the airbag apparatus 90 act | operates is suppressed. Is done.

  Further, in the manufacturing method of the seat pad 10 using the foaming mold 50, the reinforcement hole 30 of the reinforcing face material 30 is hooked on the locking protrusion 60, and the reinforcement face material 30 is tensioned while being reinforced. The magnetic body 33 of the face material 30 can be magnetically attracted to the magnet 65. Accordingly, the reinforcing face material 30 can be brought into close contact with the outer surface of the core 53, and the foamed resin material 80 is prevented from entering between the core 53 and the reinforcing face material 30.

[Other Embodiments]
The present invention is not limited to the above-described embodiment. For example, the embodiments described below are also included in the technical scope of the present invention, and various modifications are possible within the scope of the invention other than the following. It can be changed and implemented.

  (1) In the above embodiment, as shown in FIG. 12, the opening edge of the engaging hole 32 of the reinforcing face member 30 is received on the surface of the locking protrusion 60 facing the tip side of the side protrusion 56. A receiving groove 60U may be formed. In this case, the surface of the locking protrusion 60 that faces the distal end side of the side protrusion 56 may be the vertical surface 61 or an inclined surface that is inclined with respect to the protruding direction of the side protrusion 56. Good.

  (2) In the above embodiment, the surface of the locking projection 60 that faces the distal end side of the side protrusion 56 is arranged substantially perpendicular to the protruding direction of the side protrusion 56. You may incline so that it may face 56 narrow part 56B side.

  (3) The configurations of (1) and (2) may be applied to only one of the locking protrusions 60 on the one side and the other side in the width direction of the side protrusion 56, or to both. May be.

  (4) In the above embodiment, the stepped portion 57 may not be provided on the side protrusion 56. In this case, it is preferable that the side protrusion 56 is configured to become narrower toward the front end side, and the narrowest part of the side protrusion 56 is in the short side direction of the main board 54. More preferably, they are arranged close to one side.

DESCRIPTION OF SYMBOLS 10 Seat pad 11 Pad main body 20 Housing recessed part 30 Reinforcing surface material 31 Opening part 32 Engagement hole 33 Magnetic body 50 Foaming mold 51 Upper mold 52 Lower mold 53 Core 56 Side protrusion 60 Locking protrusion 62 Inclined surface 65 Magnet 90 Airbag device

Claims (4)

An opening provided in the reinforcing surface member of the pad body, the pad main body having a housing recess for housing the airbag device, and a reinforcing face material laid on the inner surface of the housing recess. The part that overlaps with is a foaming mold for foaming a seat pad that is torn during operation of the airbag device,
A molding protrusion for forming the housing recess, and a fixing means for fixing the reinforcing face material on the outer surface of the molding protrusion in a state where the tip of the molding protrusion is inserted into the opening. And
The fixing means includes
A locking protrusion provided at the tip of the forming protrusion and locking in an engagement hole formed in the vicinity of the opening in the reinforcing face material;
A foaming mold comprising: a magnetic body provided in a portion of the reinforcing face member remote from the opening; and a magnet that magnetically attracts. The molding protrusion protrudes along the opening and closing direction of the foam mold,
The surface of the locking protrusion that faces the base end side of the forming protrusion is an inclined surface that gradually decreases the protruding amount of the locking protrusion as it goes toward the base end. The foaming mold according to 1. An upper mold, a lower mold, and a core addressed to the upper mold;
The outer edge portion of the core is provided with an outer edge facing portion facing the upper mold with a space from the lower side,
The molding protrusion protrudes downward from the outer edge facing portion,
The foam molding die according to claim 1, wherein the magnet includes a portion arranged on a surface facing the upper die among the outer edge facing portions. A method of manufacturing a seat pad using the foaming mold according to claim 1,
An engagement hole penetrating the vicinity of the opening is formed in the reinforcing face material,
In fixing the reinforcing face material to the forming protrusion, the locking protrusion of the foaming mold is locked in the engagement hole of the reinforcing face material, and then the magnetic property of the reinforcing face material is set. A method of manufacturing a seat pad, wherein the body and the magnet of the foam mold are magnetically attracted.

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