WO2014054299A1 - シート用バックパッド及びその製造方法 - Google Patents

シート用バックパッド及びその製造方法 Download PDF

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Publication number
WO2014054299A1
WO2014054299A1 PCT/JP2013/005941 JP2013005941W WO2014054299A1 WO 2014054299 A1 WO2014054299 A1 WO 2014054299A1 JP 2013005941 W JP2013005941 W JP 2013005941W WO 2014054299 A1 WO2014054299 A1 WO 2014054299A1
Authority
WO
WIPO (PCT)
Prior art keywords
mold
pad
connecting portion
back pad
main body
Prior art date
Application number
PCT/JP2013/005941
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
史裕 小島
Original Assignee
東洋ゴム工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 東洋ゴム工業株式会社 filed Critical 東洋ゴム工業株式会社
Priority to CN201380002256.XA priority Critical patent/CN104039592A/zh
Publication of WO2014054299A1 publication Critical patent/WO2014054299A1/ja

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/64—Back-rests or cushions
    • B60N2/643—Back-rests or cushions shape of the back-rests
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/68—Seat frames
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
    • B29C44/14—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements the preformed part being a lining
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/80—Head-rests
    • B60N2/897—Head-rests with sleeves located in the back-rest for guiding the rods of the head-rest

Definitions

  • the present invention relates to a seat back pad used in automobiles and the like, and a method of manufacturing the seat back pad.
  • a back pad used as a cushioning material in a backrest portion of a vehicle seat is made of a molded product of foamed resin such as flexible polyurethane foam, and is assembled to a metal frame and covered with a skin material. And it is comprised as a backrest part of the vehicle seat.
  • a seat back pad has an inward projecting structure comprising a connecting portion extending rearward from the upper side of the pad main body and a flange portion extending downward from the connecting portion with a distance from the rear surface of the pad main body.
  • the part is provided integrally and has a bag shape opened on the back surface, and the frame is held between the pad main body and the overhanging part.
  • the pad body corresponding to the surface side of the back pad and the lower mold for molding the outer surface of the connecting portion, the core mold for molding the inner surface of the pad body and the overhanging portion, and the core mold Is a three-part mold having an upper mold that can be closed to the lower mold.
  • the foamed resin stock solution is injected into the lower mold, and the upper mold is closed to the lower mold together with the core mold to perform the foam molding.
  • a through hole penetrating up and down the connecting portion may be formed (for example, Patent Document 1 below).
  • a columnar part is provided between the lower mold surface and the core mold surface for forming the connecting part to form a through hole in the connecting part.
  • the foamed resin stock solution injected into the lower mold flows into the connecting part and the flange part sequentially around the tip of the core mold. Therefore, there is a problem that the liquid flow is likely to be hindered by the columnar portion, and a molding defect such as lacking is likely to occur around the through hole of the molded back pad.
  • the foamed resin stock solution flowing in the mold is divided in the width direction of the connecting portion by the columnar part and merges behind the columnar part (that is, downstream in the flow direction of the foamed resin stock solution).
  • An air pocket that does not allow liquid to flow into is formed between the merging portion and the columnar portion, and as a result, there is a lack of thickness around the through hole of the back pad, particularly at the rear edge of the through hole corresponding to the back side of the columnar portion.
  • the through hole of the back pad particularly at the rear edge of the through hole corresponding to the back side of the columnar portion.
  • the present invention has been made in view of the above points, and is provided with a back pad for a seat that can be provided with a through-hole while securing formability in a connecting portion that extends backward from the upper side of the pad main body, and It aims at providing the manufacturing method.
  • the seat back pad according to the present invention includes a pad main body made of a flexible foam, a connecting portion extending rearward from the pad main body, and extending downward from the connecting portion with a gap from the back surface of the pad main body.
  • the flange portion and the through hole penetrating the connecting portion up and down are depressed downward from the upper surface of the connecting portion, and from the peripheral portion of the through hole.
  • a concave groove extending to one side in the width direction of the connecting portion is provided.
  • annular protrusion protruding upward may be provided at a peripheral edge of the through hole, and the concave groove may be extended from the outside of the annular protrusion.
  • the manufacturing method of the seat back pad according to the present invention includes a pad main body made of flexible foam, a connecting portion extending rearward from the upper side of the pad main body, and a back surface of the pad main body.
  • the sheet back pad including the flange portion extending downward from the connection portion and the through hole penetrating the connection portion up and down is foam-molded with a forming die.
  • the mold includes: a lower mold that molds the outer surface of the pad body and the connecting portion; an upper mold that molds the outer surface of the flange portion; a core mold that molds the inner surfaces of the connecting portion and the flange portion; A columnar part for forming the through hole provided between a mold surface for forming the outer surface of the connecting part in the mold and a mold surface for forming the inner surface of the connecting part in the core mold, and the connection in the lower mold And a protruding line extending from the side of the columnar part to one side in the width direction of the connecting part on the mold surface for molding the outer surface of the resin, and injecting a foamed resin stock solution into the lower mold, A sheet back pad is formed by closing the mold with respect to the lower mold.
  • FIG. 2 is a rear view of the seat back pad shown in FIG. 1.
  • FIG. 3 is an enlarged view of a main part of a cross section taken along line AA in FIG. 2. It is sectional drawing of the foaming mold which shape
  • FIG. 6 is a sectional view taken along line BB of FIG.
  • FIG. 7 is a cross-sectional view taken along the line CC of FIG.
  • the back pad 10 of the embodiment shown in FIGS. 1 and 2 is a seat back pad used as a cushion material in a backrest portion of a front seat of an automobile, for example.
  • the back pad 10 includes a pad main body 12 made of a flexible foam such as a flexible polyurethane foam, and a reinforcing cloth 14 laminated and integrated on the back side thereof, and woven or knitted fabric or leather is sewn together.
  • the surface is covered with a skin material (not shown) and assembled to the frame 4 (see FIG. 3) to constitute a backrest portion.
  • An inward flange-like overhanging portion 16 for mounting the frame 4 is integrally provided on the upper side portion on the back side of the pad main body 12.
  • the overhanging portion 16 extends inward from the pad main body 12 toward the inside of the pad main body 12 with a predetermined distance from the connecting portion 18 extending so as to protrude rearward Z from the pad main body 12.
  • a flange portion 20 extending in the direction, and is formed in a bag shape that opens downward together with the pad main body 12.
  • the connecting portion 18 constitutes the upper portion of the back pad 10 and is formed with a recessed portion 30 that is recessed downward so that the lower portion of the headrest 28 (see FIG. 2) is fitted in the center portion in the width direction.
  • the width direction of the connecting portion 18 (that is, the left-right direction) is such that a through hole 32 for inserting a mounting bracket 28a provided in the headrest 28 penetrates the connecting portion 18 up and down.
  • a plurality of locations (two locations in this example) are provided at intervals.
  • An annular protrusion 34 protruding upward from the bottom 30 a of the recessed portion 30 is provided at the peripheral edge of the through hole 32 so as to surround the through hole 32.
  • a concave groove 36 that is recessed downward from the bottom 30a is provided in the bottom 30a of the concave 30.
  • the concave groove 36 is provided only on one side W1 in the left-right direction with respect to one through hole 32, and is not provided on the other side W2 in the left-right direction. It extends from the outside of the portion 34 in one direction W1 in the left-right direction (that is, outward of the annular protrusion 34).
  • the depth of the concave groove 36 can be set in a range of 20 to 80% of the thickness of the connecting portion 18 where the concave groove 36 is formed.
  • a concave groove 36 extends to the left from the left side of the annular protrusion 34 provided at the peripheral edge of the left through hole 32 when the back pad 10 is viewed from the front.
  • the case where the groove 36 extends rightward from the right side of the annular protrusion 34 provided at the peripheral edge of the right through hole 32 when the back pad 10 is viewed from the front will be described.
  • the concave groove 36 may extend from the right side of the annular protrusion 34 of the through hole 32 to the right, or the concave groove 36 may extend from the left side of the annular protrusion 34 of the right through hole 32 to the left.
  • the flange portion 20 is formed with a thick portion 22 on the connecting portion 18 side, and a thin portion 26 is formed on the tip side with respect to the thick portion 22 via a step portion 24.
  • the reinforcing cloth 14 is sewn in a bag shape, and is integrated by foam molding of the flexible polyurethane foam so as to cover the back surface of the pad main body 12 and the inner surface of the overhanging portion 16.
  • the reinforcing cloth 14 can be used without particular limitation as long as it has appropriate air permeability and can prevent the polyurethane foam from oozing out during foam molding, and can be used without any limitation. A complex or the like can be used.
  • the foam mold 50 for molding the back pad 10 includes a lower mold 52 that molds the outer surfaces of the pad body 12 and the connecting portion 18, and an upper mold 54 that molds the outer surface of the flange portion 20. And a core die 56 for molding the inner surfaces of the connecting portion 18 and the flange portion 20.
  • the upper die 54 is provided so as to be rotatable with respect to the lower die 52 via a hinge 58, and is configured to open and close the upper surface opening of the lower die 52.
  • a core die 56 is disposed below the upper die 54.
  • the core mold 56 is detachably provided from the upper mold 54 by a driving device 60 provided on the upper mold 54.
  • the columnar portion 62 is a first portion that protrudes from a mold surface 52 a that molds the outer surface of the connecting portion 18 in the lower mold 52 toward a core mold 56 that faces the mold surface 52 a.
  • the convex portion 68 and the second convex portion 70 that protrudes from the mold surface 56a that molds the inner surface of the connecting portion 18 in the core mold 56 toward the mold surface 52a of the lower mold 52 that faces the mold surface 56a. It is composed of that.
  • the annular recess 64 is recessed from the mold surface 52 a of the lower mold 52 toward the outside of the cavity 59 so as to surround the first protrusion 68.
  • the ridge 66 has a flat plate shape protruding from the mold surface 52a of the lower mold 52 toward the mold surface 56a of the core mold 56 facing the mold surface 52a. Is set to a range of 20 to 80% of the distance between the mold surface 52a and the mold surface 56a of the core mold 56.
  • the ridge 66 extends from an annular recess 64 provided at the peripheral edge of the first projection 68 to one side W1 of the back pad 10 in the left-right direction.
  • the protrusion 66 is provided only on one side W1 in the left-right direction of the back pad 10 with respect to one first protrusion 68 (columnar part 62), and on one side W1 in the left-right direction of the columnar part 62,
  • the space between the mold surface 52a of the lower mold 52 and the mold surface 56a of the core mold 56 is narrowed to prevent the flow of the foamed resin flowing from the bottom surface side of the lower mold 52 upward X.
  • the reinforcing cloth 14 previously sewn in a bag shape is placed on the core mold 56 and fixed by a pin (not shown) or the like.
  • the foamed resin stock solution 80 is injected into the lower mold 52 using an injection device (not shown), the upper mold 54 and the core mold 56 are closed with respect to the lower mold 52 as shown in FIG. As a result, the foamed resin stock solution 80 fills the cavity 59 of the foam molding die 50 while foaming.
  • the foamed resin stock solution 80 injected into the lower mold 52 is moved from the pad main body 12 side formed between the lower mold 52 and the core mold 56 toward the upper X, and the tip of the core mold 56 ( That is, it flows so as to wrap around the mold surface 56 a) of the core mold 56.
  • the mold surface 52a of the lower mold 52 opposite to the mold surface 56a of the core mold 56 is projected from the peripheral edge of the first projection 68 only to one side W1 in the left-right direction.
  • 66 protrudes and the flow of the foamed resin is obstructed on one side W ⁇ b> 1 of the columnar part 62 in the left-right direction. Therefore, the foamed resin flowing at the tip of the core mold 56 is divided in the left-right direction W by the columnar part 62. However, more foamed resin flows on the other side W2 than on the one side W1 of the columnar portion 62 in the left-right direction.
  • the foamed resin that has flowed through the other side W2 in the left-right direction flows behind the columnar part 62 (downstream in the flow direction of the foamed resin) and flows into the one side W1, and the ridge 66 is provided.
  • the foamed resin divided in the left-right direction W by the columnar portion 62 joins.
  • the foamed resin that flows between the lower mold 52 and the core mold 56 flows into the flange portion 20 side between the upper mold 54 and the core mold 56 to mold the back pad 10.
  • the upper die 54 is opened, and the core die 56 is detached from the upper die 54 by the driving device 60, and then the back pad 10 is removed, whereby the back pad 10 is removed. 10 is obtained.
  • the lower mold 52 extends from the peripheral portion of the columnar portion 62 for forming the through hole 32 in the mold surface 52a for molding the outer surface of the connecting portion 18 to the one side W1 in the left-right direction.
  • the foamed resin divided in the left-right direction W by the columnar part 62 is merged at the position P near the one side W1 in the left-right direction from the back of the columnar part 62. It is difficult to form an air pocket that does not flow in, and it is difficult for a lack of thickness or the like to occur in the peripheral portion of the through hole 32.

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  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Seats For Vehicles (AREA)
  • Molding Of Porous Articles (AREA)
PCT/JP2013/005941 2012-10-05 2013-10-04 シート用バックパッド及びその製造方法 WO2014054299A1 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201380002256.XA CN104039592A (zh) 2012-10-05 2013-10-04 座椅用靠垫及其制造方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012-223209 2012-10-05
JP2012223209A JP5951439B2 (ja) 2012-10-05 2012-10-05 シート用バックパッド及びその製造方法

Publications (1)

Publication Number Publication Date
WO2014054299A1 true WO2014054299A1 (ja) 2014-04-10

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CN (1) CN104039592A (zh)
WO (1) WO2014054299A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3037890A1 (fr) * 2015-06-29 2016-12-30 Faurecia Sieges D'automobile Realisation d'un element d'habillage pour siege de vehicule automobile ou habitacle de vehicule automobile

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6098616B2 (ja) * 2014-11-13 2017-03-22 トヨタ自動車株式会社 車両用シート
JP6484110B2 (ja) * 2015-05-28 2019-03-13 株式会社ブリヂストン 発泡成形体の製造装置および発泡成形体の製造方法
JP6658344B2 (ja) * 2016-06-28 2020-03-04 トヨタ紡織株式会社 乗物用シート
JP7131462B2 (ja) * 2019-04-02 2022-09-06 トヨタ紡織株式会社 乗物用シート
JP7093016B2 (ja) * 2019-06-03 2022-06-29 東海興業株式会社 発泡成形品、その成形型及びその成形方法
CN113442809B (zh) * 2021-07-26 2022-10-28 麦格纳座椅研发(重庆)有限公司 一种用于汽车座椅的靠背头枕安装方法

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JP2006007418A (ja) * 2004-06-21 2006-01-12 Toyo Tire & Rubber Co Ltd シート用パッドの製造方法
JP2009220359A (ja) * 2008-03-14 2009-10-01 Inoac Corp 発泡成形品
JP2010018196A (ja) * 2008-07-11 2010-01-28 Bridgestone Corp シートバックパッド及び車両用シート
JP2010201726A (ja) * 2009-03-02 2010-09-16 Bridgestone Corp シートパッド成形型およびその成形型を用いたシートパッドの製造方法

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JPH0625164Y2 (ja) * 1990-04-28 1994-07-06 池田物産株式会社 車両用シートのアームレスト
WO2006102751A1 (en) * 2005-03-30 2006-10-05 Woodbridge Foam Corporation Foam seat element, mold for the production thereof and method to manufacture the mold
JP2009072916A (ja) * 2007-09-18 2009-04-09 Toyo Tire & Rubber Co Ltd シート用バックパッド及びその製造方法
JP5380909B2 (ja) * 2008-05-30 2014-01-08 株式会社ブリヂストン 金型及び樹脂発泡成形品の成形方法
JP5354993B2 (ja) * 2008-08-25 2013-11-27 河西工業株式会社 自動車用内装部品並びにその製造方法
CN102413738B (zh) * 2009-03-02 2014-09-17 株式会社普利司通 座椅坐垫
EP2386398B1 (en) * 2010-05-14 2013-07-10 Tecnocad Progetti S.p.A. A method for producing a foamed article

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006007418A (ja) * 2004-06-21 2006-01-12 Toyo Tire & Rubber Co Ltd シート用パッドの製造方法
JP2009220359A (ja) * 2008-03-14 2009-10-01 Inoac Corp 発泡成形品
JP2010018196A (ja) * 2008-07-11 2010-01-28 Bridgestone Corp シートバックパッド及び車両用シート
JP2010201726A (ja) * 2009-03-02 2010-09-16 Bridgestone Corp シートパッド成形型およびその成形型を用いたシートパッドの製造方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3037890A1 (fr) * 2015-06-29 2016-12-30 Faurecia Sieges D'automobile Realisation d'un element d'habillage pour siege de vehicule automobile ou habitacle de vehicule automobile
US10710481B2 (en) 2015-06-29 2020-07-14 Faurecia Sieges D'automobile Forming of a cover element for a motor vehicle seat or the interior of a motor vehicle

Also Published As

Publication number Publication date
JP2014073795A (ja) 2014-04-24
JP5951439B2 (ja) 2016-07-13
CN104039592A (zh) 2014-09-10

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