JP5112654B2 - Vehicle seat back pad and method of manufacturing the same - Google Patents

Vehicle seat back pad and method of manufacturing the same Download PDF

Info

Publication number
JP5112654B2
JP5112654B2 JP2006199211A JP2006199211A JP5112654B2 JP 5112654 B2 JP5112654 B2 JP 5112654B2 JP 2006199211 A JP2006199211 A JP 2006199211A JP 2006199211 A JP2006199211 A JP 2006199211A JP 5112654 B2 JP5112654 B2 JP 5112654B2
Authority
JP
Japan
Prior art keywords
cavity
foam
seat back
back pad
space
Prior art date
Legal status (The legal status 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 status listed.)
Active
Application number
JP2006199211A
Other languages
Japanese (ja)
Other versions
JP2008023084A (en
Inventor
哲史 近藤
隆明 平尾
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Inoac Corp
Original Assignee
Inoac Corp
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 Inoac Corp filed Critical Inoac Corp
Priority to JP2006199211A priority Critical patent/JP5112654B2/en
Publication of JP2008023084A publication Critical patent/JP2008023084A/en
Application granted granted Critical
Publication of JP5112654B2 publication Critical patent/JP5112654B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Mattresses And Other Support Structures For Chairs And Beds (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Molding Of Porous Articles (AREA)

Description

この発明は、車両用シートバックパッド、及び、同車両用シートバックパッドの製造方法に関するものである。   The present invention relates to a vehicle seat back pad and a method for manufacturing the vehicle seat back pad.

車両用シートに用いられるシートバックパッドには、シートの前面側に配置される背もたれ部と、この背もたれ部の上端から後方へ延びる肩部と、肩部の後端から下方へ延びる背部とを備えたものが存在する。なお、背部は、シートに見た目の高級感を付与したり、例えば後側のシートの搭乗者が前のシートの背もたれ部の背面を触ったときの手触り感を向上させたりするために設けられている。   A seat back pad used for a vehicle seat includes a backrest portion disposed on the front surface side of the seat, a shoulder portion extending rearward from the upper end of the backrest portion, and a back portion extending downward from the rear end of the shoulder portion. There is something. The back portion is provided to give the seat a high-class appearance, or to improve the feel when the passenger on the back seat touches the back of the back portion of the front seat, for example. Yes.

従来、この種のシートバックパッドの製造方法としては、例えば特許文献１，２において開示されるものがある。特許文献１の製造方法においては、図８に示すように、成形型５０の第１キャビティ５１において、シートバックパッドの背もたれ部が成形される。また、成形型５０の第２キャビティ５２において肩部が成形される。さらに、成形型５０の第３キャビティ５３において背部が成形される。そして、成形型５０は、第３キャビティ５３が第１キャビティ５１の上方に位置するように構成されている。これは、シートバックパッドの発泡成形時において、まず、最も大きな容量を有する第１キャビティ５１に発泡体原料を充満させた後、第２キャビティ５２及び第３キャビティ５３に発泡体原料を充満させるためである。さらに、第１キャビティ５１には、邪魔板５４が形成されている。   Conventionally, as a method for manufacturing this type of seat back pad, for example, there are those disclosed in Patent Documents 1 and 2. In the manufacturing method of Patent Document 1, as shown in FIG. 8, the backrest portion of the seat back pad is molded in the first cavity 51 of the mold 50. Further, the shoulder is formed in the second cavity 52 of the mold 50. Further, the back portion is molded in the third cavity 53 of the mold 50. The mold 50 is configured such that the third cavity 53 is located above the first cavity 51. This is because, in foam molding of the seat back pad, first, the first cavity 51 having the largest capacity is filled with the foam material, and then the second cavity 52 and the third cavity 53 are filled with the foam material. It is. Further, a baffle plate 54 is formed in the first cavity 51.

そして、車両用シートバックパッドの製造時には、邪魔板５４の左側に発泡体原料が注入される。この発泡体原料は、発泡に伴って第１キャビティ５１、第２キャビティ５２及び第３キャビティ５３に回る。このとき、前記邪魔板５４により、邪魔板５４の右側への発泡体原料の移動が制限される。このため、発泡体原料は、第１キャビティ５１及び第２キャビティ５２よりも高い位置にある第３キャビティ５３に回り易くなり、背部におけるボイドの発生が有効に防止されるとしている。   When the vehicle seat back pad is manufactured, the foam material is injected into the left side of the baffle plate 54. The foam material turns to the first cavity 51, the second cavity 52, and the third cavity 53 along with foaming. At this time, the baffle plate 54 restricts the movement of the foam material to the right side of the baffle plate 54. For this reason, it becomes easy for the foam raw material to pass around the third cavity 53 located higher than the first cavity 51 and the second cavity 52, and the generation of voids in the back portion is effectively prevented.

また、特許文献２に記載された製造方法においては、特許文献１の製造方法とほぼ同様に、図９に示すように、成形型６０の第１キャビティ６１において背もたれ部が成形される。また、成形型６０の第２キャビティ６２において肩部が成形される。さらに、成形型６０の第３キャビティ６３において背部が成形される。そして、成形型６０は、第３キャビティ６３が第１キャビティ６１の上方に位置するように構成されている。この成形型６０においては、第１キャビティ６１と第３キャビティ６３とを区画する隔壁部６４に、両キャビティ６１，６３を連通する短縮通路６４ａが形成されている。そして、第１キャビティ６１に注入された発泡体原料は、隔壁部６４を迂回して第２キャビティ６２を介して第３キャビティ６３に回るとともに、短縮通路６４ａを通って第３キャビティ６３に回る。このため、背部におけるボイドの発生が有効に防止されるとしている。
特開平８−１８３０４０号 特開２００５−２３８５１４号 Further, in the manufacturing method described in Patent Document 2, the backrest portion is formed in the first cavity 61 of the forming die 60 as shown in FIG. Further, a shoulder is formed in the second cavity 62 of the mold 60. Further, the back portion is molded in the third cavity 63 of the mold 60. The mold 60 is configured such that the third cavity 63 is positioned above the first cavity 61. In the mold 60, a shortened passage 64 a that communicates both the cavities 61 and 63 is formed in the partition wall 64 that partitions the first cavity 61 and the third cavity 63. Then, the foam raw material injected into the first cavity 61 bypasses the partition wall 64 and turns to the third cavity 63 via the second cavity 62 and also turns to the third cavity 63 via the shortened passage 64a. For this reason, the generation of voids in the back is effectively prevented.
JP-A-8-183040 JP 2005-238514 A

ところで、特許文献１の構成においては、図８に示すように、成形型５０としてそのパーティングラインＰＬよりも高い位置において上方に膨らんだ形状の第３キャビティ５３を備えている。このような成形型５０を用いてシートバックパッドを成形するときには、邪魔板５４を設けたとしても第３キャビティ５３にガスが残りやすく、成形されたシートバックパッドに、図２に二点鎖線で示すようなボイドＢを生じさせやすい。このようなボイドＢは、成形製品の外観品質の低下等を招く。ボイドＢの発生を防止するためには、発泡成形中に成形型５０を傾かせ、背部の先端側のパーティングラインＰＬを第３キャビティ５３よりも高い位置に配置し、パーティングラインＰＬからガスが抜けやすくする方法もある。しかしながら、この場合には、成形型５０の傾きを変更する設備が必要となる。   By the way, in the structure of patent document 1, as shown in FIG. 8, the 3rd cavity 53 of the shape swelled upwards in the position higher than the parting line PL as the shaping | molding die 50 is provided. When the seat back pad is molded using such a mold 50, even if the baffle plate 54 is provided, gas tends to remain in the third cavity 53, and the molded seat back pad is shown by a two-dot chain line in FIG. It is easy to generate void B as shown. Such void B causes a decrease in appearance quality of the molded product. In order to prevent the generation of void B, the mold 50 is tilted during foam molding, and the parting line PL on the tip side of the back is disposed at a position higher than the third cavity 53, and gas is discharged from the parting line PL. There is also a way to make it easier to remove. However, in this case, equipment for changing the inclination of the mold 50 is required.

また、上記特許文献２に記載された成形型６０においては、第１キャビティ６１によって成形された背もたれ部と、第３キャビティ６３によって成形された背部とが、短縮通路６４ａを通じて繋がった状態となる。このため、成形後のシートバックパッドを成形型６０から脱型させるときには、背もたれ部と背部とを切り離さなければならず、脱型作業が面倒となる。加えて、背もたれ部と背部とがうまく切り離されるとは限らず、背もたれ部または背部が損傷することがある。   Moreover, in the shaping | molding die 60 described in the said patent document 2, the backrest part shape | molded by the 1st cavity 61 and the back part shape | molded by the 3rd cavity 63 will be in the state connected through the shortening channel | path 64a. For this reason, when the molded seat back pad is removed from the mold 60, the backrest portion and the back portion must be separated, and the demolding operation becomes troublesome. In addition, the back portion and the back portion are not always well separated, and the back portion or the back portion may be damaged.

この発明の目的は、背部にボイドを生じさせにくく、しかも、脱型作業が容易で、脱型による本体部の損傷を防止できる車両用シートバックパッド及びその製造方法を提供することにある。   An object of the present invention is to provide a vehicle seat back pad that is less likely to cause voids in the back portion, that is easy to remove, and that can prevent damage to the main body due to removal, and a method for manufacturing the same.

上記目的を達成するために、請求項１に記載の発明は、成形型のキャビティ内に発泡体原料を注入して発泡・硬化させ、背もたれ部と、同背もたれ部の上端から後方へ延びる肩部と、同肩部の後端から下方へ延びるとともにその先端は背もたれ部側に向かって薄くなるように形成されている背部とを備えたシートバックパッドを成形する車両用シートバックパッドの製造方法であって、前記キャビティ内において前記背部の背もたれ部側に対応する位置に、全体として山形状の断面を有し、前記背部の先端側及びその反対側に向かって下降傾斜するように形成されている補助発泡体を配置し、当該キャビティ内において前記背部の先端側に対応する流路は、前記補助発泡体の頂部位置から先端に向かって更に徐々に狭められており、この状態においてキャビティ内に発泡樹脂原料を注入して発泡させ、前記背部の先端側まで流れ込んだ状態で硬化させ、成形されたシートバックパッドに前記補助発泡体を結合一体化させることを特徴とする。 In order to achieve the above object, according to the first aspect of the present invention, there is provided a backrest portion and a shoulder portion extending rearward from the upper end of the backrest portion by injecting a foam raw material into the cavity of the mold and foaming and curing the foam material. And a seat back pad manufacturing method for forming a seat back pad that extends downward from the rear end of the shoulder portion and has a tip portion that is formed so as to be thinned toward the backrest portion side. In the cavity, at a position corresponding to the backrest portion side of the back portion, it has a mountain-shaped cross section as a whole, and is formed to be inclined downward toward the tip side of the back portion and the opposite side thereof. The auxiliary foam is disposed, and the flow path corresponding to the tip side of the back portion in the cavity is further gradually narrowed from the top position of the auxiliary foam toward the tip, and this state Foamed by injecting a foaming resin material into the Oite cavity, and cured in a state in which flowed to the tip side of the back, characterized in that for coupling integrally the auxiliary foam molded seat back pad.

請求項２に記載の発明は、請求項１に記載の製造方法によって製造された車両用シートバックパッドにおいて、前記補助発泡体は、前記背部の背もたれ部側に埋設されていることを特徴とする。 According to a second aspect of the present invention, in the vehicle seat back pad manufactured by the manufacturing method according to the first aspect, the auxiliary foam is embedded on the backrest side of the back portion. .

（作用）
請求項１，２に記載の発明においては、シートバックパッドの成形時に発泡樹脂原料の流れが滞り易い背部に対応する流路は、同背部の背もたれ部側に設けられた補助発泡体により狭められる。このため、背部の流路を流れる発泡樹脂原料の流速が速くなり、発泡樹脂原料は背部の流路に滞ることなく流れるとともに充満する。従って、背部におけるボイドの発生が有効に防止される。 (Function)
In the first and second aspects of the invention, the flow path corresponding to the back portion where the flow of the foamed resin raw material easily stagnate when the seat back pad is molded is narrowed by the auxiliary foam provided on the backrest portion side of the back portion. . For this reason, the flow rate of the foamed resin material flowing through the back channel is increased, and the foamed resin material flows and fills without stagnation in the back channel. Therefore, the generation of voids at the back is effectively prevented.

加えて、シートバックパッドの成形時に背部に対応する流路を流れる発泡樹脂原料は、補助発泡体の表面に沿って円滑に流れ、補助発泡体の周囲にガスが残留されることはない。このため、補助発泡体の周囲におけるボイドの発生が有効に防止される。 In addition , the foamed resin raw material flowing through the flow path corresponding to the back portion when the seat back pad is molded smoothly flows along the surface of the auxiliary foam, and no gas remains around the auxiliary foam. For this reason, generation of voids around the auxiliary foam is effectively prevented.

この発明によれば、背部にボイドを生じさせにくく、しかも、脱型作業が容易で、脱型による本体部の損傷を防止できる車両用シートバックパッド及びその製造方法を提供することができる。   According to the present invention, it is possible to provide a vehicle seat back pad and a method for manufacturing the same that are less likely to cause voids in the back portion, are easy to remove, and can prevent damage to the main body due to removal.

次に、この発明を具体化した一実施形態を図１〜図７に従って説明する。
図１に示すように、車両用シートバックパッド１０は、図示しないシートフレームの前側に配置される背もたれ部１１、この背もたれ部１１の上端から後方へ延びる肩部１２、及び、肩部１２の後端から下方へ反転して延びる背部１３からなる本体部１４を備えている。本体部１４は、例えばポリウレタン樹脂等の合成樹脂により一体的に発泡成形された合成樹脂発泡体からなる。なお、肩部１２は、シートフレームの上側に配置される。また、背部１３は、シートフレームの背面側上部に配置されるとともに、その先端は、背もたれ部１１側に向かって薄くなるように形成されている。 Next, an embodiment embodying the present invention will be described with reference to FIGS.
As shown in FIG. 1, the vehicle seat back pad 10 includes a backrest portion 11 disposed on the front side of a seat frame (not shown), a shoulder portion 12 extending rearward from the upper end of the backrest portion 11, and a rear portion of the shoulder portion 12. A main body portion 14 is provided that includes a back portion 13 that is inverted and extended downward from the end. The main body 14 is made of a synthetic resin foam that is integrally foam-molded with a synthetic resin such as polyurethane resin. The shoulder 12 is disposed on the upper side of the seat frame. The back portion 13 is disposed at the upper part on the back side of the seat frame, and the tip thereof is formed so as to become thinner toward the backrest portion 11 side.

本体部１４における背部１３の背もたれ部１１側には、補助発泡体１５が埋設されている。この補助発泡体１５は、多数のポリウレタン発泡体のチップをバインダによって結合したものであって、図２に示すように、その断面は全体として山形をなし、背部１３の先端及びその反対側に向かって下降傾斜するように形成されている。補助発泡体１５は、本体部１４の成形時に表面内部に浸透した発泡体原料によって本体部１４に結合一体化されている。   An auxiliary foam 15 is embedded on the back portion 11 side of the back portion 13 in the main body portion 14. The auxiliary foam 15 has a large number of polyurethane foam chips joined together by a binder. As shown in FIG. 2, the cross section of the auxiliary foam 15 has an overall chevron shape, and faces the tip of the back portion 13 and the opposite side. Are formed so as to be inclined downward. The auxiliary foam 15 is integrally joined to the main body 14 by a foam raw material that has penetrated into the surface when the main body 14 is molded.

さらに、本体部１４における背もたれ部１１の背面、肩部１２の下面、及び、背部１３の前面には、例えば不織布、織布または編み地からなる被覆シート１６が結合一体化されている。被覆シート１６は、本体部１４の発泡成形時に、その発泡体原料が浸透することによって本体部１４に結合されている。前記補助発泡体１５は、被覆シート１６の内側に配置されている。なお、被覆シート１６は、本体部１４がシートフレームと直接接触しないように保護している。   Further, a covering sheet 16 made of, for example, a nonwoven fabric, a woven fabric, or a knitted fabric is integrally joined to the back surface of the backrest portion 11, the lower surface of the shoulder portion 12, and the front surface of the back portion 13 in the main body portion 14. The cover sheet 16 is bonded to the main body 14 by the permeation of the foam material when the main body 14 is foam-molded. The auxiliary foam 15 is disposed inside the covering sheet 16. The covering sheet 16 protects the main body portion 14 from direct contact with the seat frame.

次に、上記のように構成された車両用シートバックパッドの製造方法について説明する。
車両用シートバックパッド１０は、図３及び図４に示す成形型２０を用いて発泡成形される。成形型２０は、下型２１、上型２２及び中型２３によって構成されている。上型２２及び中型２３は、下型２１の一端側に対し、それぞれ支持軸２４ａ，２４ｂを介して開閉可能に連結されている。 Next, a method for manufacturing the vehicle seat back pad configured as described above will be described.
The vehicle seat back pad 10 is foam-molded using a molding die 20 shown in FIGS. 3 and 4. The mold 20 includes a lower mold 21, an upper mold 22, and a middle mold 23. The upper mold 22 and the middle mold 23 are connected to one end side of the lower mold 21 through support shafts 24a and 24b so as to be opened and closed.

下型２１、上型２２及び中型２３によって、本体部１４を成形するためのキャビティ２５が形成される。キャビティ２５には、本体部１４の背もたれ部１１を成形する第１空間２５ａと、肩部１２を成形する第２空間２５ｂと、背部１３を成形する第３空間２５ｃとが形成されている。第２空間２５ｂ及び第３空間２５ｃは、第１空間２５ａの上方に配置されている。   A cavity 25 for molding the main body 14 is formed by the lower mold 21, the upper mold 22, and the middle mold 23. In the cavity 25, a first space 25a for forming the backrest portion 11 of the main body portion 14, a second space 25b for forming the shoulder portion 12, and a third space 25c for forming the back portion 13 are formed. The second space 25b and the third space 25c are disposed above the first space 25a.

上記成形型２０を用いて車両用シートバックパッド１０を成形するには、まず、図４に示すように、上型２２及び中型２３を型開きした状態で、下型２１の底面、すなわち、第１空間２５ａ内に、本体部１４の発泡樹脂原料Ｍを注入する。また、中型２３の成形面上に、被覆シート１６を例えば両面テープによって張り付ける。さらに、中型２３において第３空間２５ｃに対応する成形面上の被覆シート１６の上に、前記補助発泡体１５を例えば両面テープによって仮止め固定する。この状態で中型２３及び上型２２を型閉じし、発泡樹脂原料Ｍを発泡させる。   In order to mold the vehicle seat back pad 10 using the molding die 20, first, as shown in FIG. 4, with the upper die 22 and the middle die 23 opened, the bottom surface of the lower die 21, ie, the first The foamed resin raw material M of the main body portion 14 is injected into the 1 space 25a. Further, the covering sheet 16 is pasted on the molding surface of the middle mold 23 by, for example, a double-sided tape. Further, the auxiliary foam 15 is temporarily fixed with a double-sided tape, for example, on the covering sheet 16 on the molding surface corresponding to the third space 25c in the middle mold 23. In this state, the middle mold 23 and the upper mold 22 are closed, and the foamed resin material M is foamed.

第１空間２５ａ内の発泡樹脂原料Ｍは、その発泡の進行に伴って、図５に示すように、まず、第１空間２５ａ内に充満していく。このとき、背もたれ部１１の下端に対応する第１空間２５ａ内のガスは、下型２１と中型２３との合わせ面間から外部に排出される。   As the foaming progresses, the foamed resin material M in the first space 25a first fills the first space 25a as shown in FIG. At this time, the gas in the first space 25 a corresponding to the lower end of the backrest portion 11 is discharged to the outside from between the mating surfaces of the lower mold 21 and the middle mold 23.

また、第１空間２５ａ内の発泡樹脂原料Ｍは、第２空間２５ｂに充満した後、第３空間２５ｃ内に流れ込む。この第３空間２５ｃにおける発泡樹脂原料Ｍの流路は、図６に示すように、断面山形状の補助発泡体１５の存在により、第２空間２５ｂ側から第３空間２５ｃの先端に向かって徐々に狭くなっている。すなわち、第３空間２５ｃの上側の成形面は、第２空間２５ｂ側から先端の手前位置までの間においてキャビティ２５内の最も高い位置にあり、手前位置から先端に向かって下降傾斜するように形成されている。そして、補助発泡体１５の頂部位置は、第３空間２５ｃの手前位置に対応する位置に配置されている。このため、第３空間２５ｃ内の流路は、第２空間２５ｂ側から補助発泡体１５の頂部位置までの間において徐々に狭められている。また、第３空間２５ｃ内の流路は、補助発泡体１５の頂部位置から第３空間２５ｃの先端に向かって更に徐々に狭められている。このため、第３空間２５ｃに流れ込んだ発泡樹脂原料Ｍは、第３空間２５ｃ内の流路を徐々に流速を速めながら円滑に流れる。その結果、第３空間２５ｃ内のガスは、上型２２と中型２３との合わせ面間から成形型２０の外部に円滑に押し出され、発泡樹脂原料Ｍは、第３空間２５ｃ内にガスを残すことなく第３空間２５ｃに円滑に充満する。そして、図７に示すように、キャビティ２５内に充満した発泡樹脂原料Ｍは硬化して本体部１４となる。このとき、補助発泡体１５は、背部１３の背もたれ部１１側に結合一体化された被覆シート１６と背部１３との間に配置される。従って、本体部１４の背部１３におけるボイドの発生は、有効に防止される。   In addition, the foamed resin material M in the first space 25a flows into the third space 25c after filling the second space 25b. As shown in FIG. 6, the flow path of the foamed resin raw material M in the third space 25c is gradually from the second space 25b side toward the tip of the third space 25c due to the presence of the auxiliary foam 15 having a mountain-shaped cross section. It has become narrower. That is, the upper molding surface of the third space 25c is at the highest position in the cavity 25 from the second space 25b side to the front position of the tip, and is formed so as to incline downward from the front position toward the tip. Has been. And the top part position of the auxiliary | assistant foam 15 is arrange | positioned in the position corresponding to the near position of the 3rd space 25c. For this reason, the flow path in the third space 25 c is gradually narrowed from the second space 25 b side to the top position of the auxiliary foam 15. The flow path in the third space 25c is further gradually narrowed from the top position of the auxiliary foam 15 toward the tip of the third space 25c. For this reason, the foamed resin material M flowing into the third space 25c flows smoothly through the flow path in the third space 25c while gradually increasing the flow velocity. As a result, the gas in the third space 25c is smoothly pushed out of the molding die 20 from between the mating surfaces of the upper mold 22 and the middle mold 23, and the foamed resin material M leaves the gas in the third space 25c. The third space 25c is smoothly filled without any trouble. Then, as shown in FIG. 7, the foamed resin material M filled in the cavity 25 is cured to become the main body portion 14. At this time, the auxiliary foam 15 is disposed between the covering sheet 16 and the back portion 13 which are combined and integrated on the backrest portion 11 side of the back portion 13. Therefore, the generation of voids in the back portion 13 of the main body portion 14 is effectively prevented.

なお、図６に二点鎖線で示すように、補助発泡体１５をその頂部から第３空間２５ｃの先端側に向かって大きく下降傾斜させることにより、第３空間２５ｃ内の流路を、補助発泡体１５の頂部位置から第３空間２５ｃの先端に向かって徐々に広くしても、背部１３におけるボイドの発生は有効に防止される。すなわち、ボイドは、第３空間２５ｃの上部に発生し易い。これは、発泡樹脂原料Ｍが、流速を速めない状態で第３空間２５ｃの流路を流れると、発泡樹脂原料Ｍが第３空間２５ｃの上部に回りにくくなり、ガスが残留し易くなるためである。これに対し、第３空間２５ｃの上部が、第２空間２５ｂ側から先端の手前位置までの間において徐々に狭くなる流路に位置しているため、発泡樹脂原料Ｍが第３空間２５ｃの上部まで発泡樹脂原料Ｍが回り、ガスの残留が有効に防止される。さらに、補助発泡体１５の頂部から第３空間２５ｃの先端までの空間は、第３空間２５ｃの上部よりも低いため、ガスが残留し難い。   In addition, as shown by a two-dot chain line in FIG. 6, the auxiliary foam 15 is greatly lowered and inclined from the top toward the tip of the third space 25c, so that the flow path in the third space 25c is sub-foamed. Even if it gradually widens from the top position of the body 15 toward the tip of the third space 25c, generation of voids in the back portion 13 is effectively prevented. That is, voids are likely to occur in the upper part of the third space 25c. This is because if the foamed resin raw material M flows through the flow path of the third space 25c without increasing the flow velocity, the foamed resin raw material M becomes difficult to turn to the upper part of the third space 25c, and gas tends to remain. is there. On the other hand, since the upper part of the third space 25c is positioned in a flow path that gradually narrows from the second space 25b side to the front end position, the foamed resin material M is located above the third space 25c. The foamed resin raw material M is rotated until the gas is effectively prevented from remaining. Furthermore, since the space from the top of the auxiliary foam 15 to the tip of the third space 25c is lower than the upper portion of the third space 25c, gas hardly remains.

また、補助発泡体１５は、全体として山形状の断面を有し、第３空間２５ｃの先端側及びその反対側に向かって下降傾斜する形状であるため、発泡樹脂原料Ｍは、補助発泡体１５の表面に沿って円滑に流れ、補助発泡体１５の周囲にガスが残留されることはない。その結果、成形された背部１３の補助発泡体１５の周囲におけるボイドの発生は、有効に防止される。   Further, since the auxiliary foam 15 has a mountain-shaped cross section as a whole and has a shape that is inclined downward toward the tip side of the third space 25c and the opposite side thereof, the foamed resin raw material M is composed of the auxiliary foam 15. The gas flows smoothly along the surface of the gas and no gas remains around the auxiliary foam 15. As a result, generation of voids around the auxiliary foam 15 of the molded back portion 13 is effectively prevented.

以上詳述したこの実施形態は、以下の効果を有する。
（１） 車両用シートバックパッド１０の本体部１４における背部１３の背もたれ部１１側に補助発泡体１５を埋設した。このため、本体部１４の成形時において発泡樹脂原料Ｍの流れが滞りやすい背部１３において、ボイドの発生を有効に防止できる。ちなみに、キャビティ２５の第３空間２５ｃは、発泡樹脂原料Ｍの流れの末端側に位置するとともに、第３空間２５ｃの上部がパーティングラインＰＬの下端よりも上方に位置しているため、補助発泡体１５が存在しない場合には、発泡樹脂原料Ｍの流れが滞り易い。従って、第３空間２５ｃの上部側にボイドが発生し易くなる。 The embodiment described above in detail has the following effects.
(1) The auxiliary foam 15 was embedded in the backrest part 11 side of the back part 13 in the main body part 14 of the vehicle seat back pad 10. For this reason, generation | occurrence | production of a void can be prevented effectively in the back part 13 in which the flow of the foamed resin raw material M is easy to stagnate at the time of shaping | molding of the main-body part 14. Incidentally, the third space 25c of the cavity 25 is located on the terminal side of the flow of the foamed resin raw material M, and the upper portion of the third space 25c is located above the lower end of the parting line PL. When the body 15 does not exist, the flow of the foamed resin raw material M tends to be stagnant. Therefore, voids are likely to occur on the upper side of the third space 25c.

（２） 補助発泡体１５は、全体として山形状の断面を有し、背部１３の先端側及びその反対側に向かって下降傾斜するように形成されている。このため、第３空間２５ｃに流れ込んだ発泡樹脂原料Ｍは、補助発泡体１５の表面に沿って円滑に流れ、補助発泡体１５の周囲にガスを残さない。従って、補助発泡体１５の周囲におけるボイドの発生を有効に防止できる。これに対し、補助発泡体１５の発泡樹脂原料Ｍの上流側あるいは下流側の端部が傾斜されることなく切り落とされた形状で、その上流側あるいは下流側の端面が発泡樹脂原料Ｍの流れる方向に面している場合には、発泡樹脂原料Ｍの流れが巻き込まれて、その部分にボイドが生じ易い。   (2) The auxiliary foam 15 has a mountain-shaped cross section as a whole, and is formed so as to be inclined downward toward the distal end side of the back portion 13 and the opposite side thereof. For this reason, the foamed resin material M that has flowed into the third space 25 c flows smoothly along the surface of the auxiliary foam 15, and does not leave gas around the auxiliary foam 15. Therefore, generation of voids around the auxiliary foam 15 can be effectively prevented. On the other hand, the upstream or downstream end of the foamed resin raw material M of the auxiliary foam 15 is cut off without being inclined, and the upstream or downstream end surface of the foamed resin raw material M flows in the flowing direction. , The flow of the foamed resin material M is entangled, and voids are likely to occur in that portion.

（３） 上記特許文献２に記載の成形方法とは異なり、本体部１４の成形時において背もたれ部１１と背部１３とが繋がることはない。従って、成形型２０から本体部１４を容易に脱型することができるとともに、脱型時における背もたれ部１１または背部１３の損傷を防止できる。   (3) Unlike the molding method described in Patent Document 2, the backrest portion 11 and the back portion 13 are not connected when the main body portion 14 is molded. Therefore, the main body 14 can be easily removed from the mold 20 and the backrest 11 or the back 13 can be prevented from being damaged during the removal.

（４） 補助発泡体１５として、本体部１４よりも剛性の高いウレタンチップブロックを用いた。このため、シートの背部は、搭乗者により手で押されても過度に撓むことはなく、シートに高級感を付与することができる。また、車両の衝突などにより後席の搭乗者が前席の背部に当たったとき、その衝撃は、補助発泡体１５によって有効に吸収される。さらに、リサイクルされたウレタンチップを用いて補助発泡体１５を製造すれば、車両用シートバックパッド１０を安価に製造することができる。   (4) As the auxiliary foam 15, a urethane chip block having higher rigidity than the main body portion 14 was used. For this reason, the back portion of the seat does not bend excessively even if it is manually pressed by the passenger, and a high-class feeling can be imparted to the seat. Further, when a passenger in the rear seat hits the back of the front seat due to a vehicle collision or the like, the impact is effectively absorbed by the auxiliary foam 15. Furthermore, if the auxiliary foam 15 is manufactured using the recycled urethane chip, the vehicle seat back pad 10 can be manufactured at low cost.

なお、この実施形態は、次のように変更して具体化することも可能である。
・ 補助発泡体１５は、弾性変形可能であればよく、例えば、単一の合成樹脂発泡体であってもよい。 In addition, this embodiment can also be changed and embodied as follows.
-The auxiliary | assistant foam 15 should just be elastically deformable, for example, a single synthetic resin foam may be sufficient as it.

・ 補助発泡体１５を、図１に二点鎖線で示すように、幅方向の中央部において左右２つに分割してもよい。   -You may divide the auxiliary | assistant foam 15 into two right and left in the center part of the width direction, as shown with a dashed-two dotted line in FIG.

一実施形態の車両用シートバックパッドを示す一部を断面化した斜視図。1 is a perspective view of a part of a vehicle seat back pad according to an embodiment. 同じく車両用シートバックパッドの背部を示す断面図。Sectional drawing which similarly shows the back part of a vehicle seat back pad. 成形型を示す縦断面図。The longitudinal cross-sectional view which shows a shaping | molding die. 型開き状態の成形型を示す縦断面図。The longitudinal cross-sectional view which shows the shaping | molding die of a mold open state. 発泡成形時の成形型を示す縦断面図。The longitudinal cross-sectional view which shows the shaping | molding die at the time of foam molding. 図５における要部を示す縦断面図。The longitudinal cross-sectional view which shows the principal part in FIG. 発泡終了時の成形型を示す縦断面図。The longitudinal cross-sectional view which shows the shaping | molding die at the time of completion | finish of foaming. 従来における車両用シートバックパッドの成形型を示す縦断面図。The longitudinal cross-sectional view which shows the shaping | molding die of the vehicle seat back pad in the past. 同じく成形型を示す縦断面図。The longitudinal cross-sectional view which similarly shows a shaping | molding die.

符号の説明Explanation of symbols

１０…車両用シートバックパッド、１１…背もたれ部、１２…肩部、１３…背部、１４…本体部、１５…補助発泡体、２０…成形型、２５…キャビティ、Ｍ…発泡樹脂原料。   DESCRIPTION OF SYMBOLS 10 ... Vehicle seat back pad, 11 ... Backrest part, 12 ... Shoulder part, 13 ... Back part, 14 ... Main-body part, 15 ... Auxiliary foam, 20 ... Mold, 25 ... Cavity, M ... Foamed resin raw material.

Claims (2)

成形型のキャビティ内に発泡体原料を注入して発泡・硬化させ、背もたれ部と、同背もたれ部の上端から後方へ延びる肩部と、同肩部の後端から下方へ延びるとともにその先端は背もたれ部側に向かって薄くなるように形成されている背部とを備えたシートバックパッドを成形する車両用シートバックパッドの製造方法であって、
前記キャビティ内において前記背部の背もたれ部側に対応する位置に、全体として山形状の断面を有し、前記背部の先端側及びその反対側に向かって下降傾斜するように形成されている補助発泡体を配置し、当該キャビティ内において前記背部の先端側に対応する流路は、前記補助発泡体の頂部位置から先端に向かって更に徐々に狭められており、
この状態においてキャビティ内に発泡樹脂原料を注入して発泡させ、前記背部の先端側まで流れ込んだ状態で硬化させ、
成形されたシートバックパッドに前記補助発泡体を結合一体化させることを特徴とする車両用シートバックパッドの製造方法。 The foam raw material is injected into the mold cavity and foamed and cured, and the backrest, the shoulder extending backward from the upper end of the backrest, and the rear end of the shoulder extending downward and the tip of the backrest A vehicle seat back pad manufacturing method for forming a seat back pad including a back portion formed so as to become thinner toward a portion side,
In the cavity, the auxiliary foam has a mountain-shaped cross section as a whole at a position corresponding to the backrest portion side of the back portion, and is formed so as to incline downward toward the tip side of the back portion and the opposite side thereof. And the flow path corresponding to the tip side of the back portion in the cavity is further gradually narrowed from the top position of the auxiliary foam toward the tip,
In this state, the foamed resin raw material is injected into the cavity and foamed, and cured in a state of flowing to the tip side of the back part,
A method for manufacturing a vehicle seat back pad, wherein the auxiliary foam is combined and integrated with a molded seat back pad. 請求項１に記載の製造方法によって製造された車両用シートバックパッドにおいて、
前記補助発泡体は、前記背部の背もたれ部側に埋設されていることを特徴とする車両用シートバックパッド。 In the vehicle seat back pad manufactured by the manufacturing method according to claim 1,
The vehicle seat back pad according to claim 1, wherein the auxiliary foam is embedded on a backrest side of the back portion .
JP2006199211A 2006-07-21 2006-07-21 Vehicle seat back pad and method of manufacturing the same Active JP5112654B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2006199211A JP5112654B2 (en) 2006-07-21 2006-07-21 Vehicle seat back pad and method of manufacturing the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006199211A JP5112654B2 (en) 2006-07-21 2006-07-21 Vehicle seat back pad and method of manufacturing the same

Publications (2)

Publication Number Publication Date
JP2008023084A JP2008023084A (en) 2008-02-07
JP5112654B2 true JP5112654B2 (en) 2013-01-09

Family

ID=39114342

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2006199211A Active JP5112654B2 (en) 2006-07-21 2006-07-21 Vehicle seat back pad and method of manufacturing the same

Country Status (1)

Country Link
JP (1) JP5112654B2 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5380909B2 (en) * 2008-05-30 2014-01-08 株式会社ブリヂストン Mold and molding method of resin foam molding
JP2010017241A (en) * 2008-07-08 2010-01-28 Bridgestone Corp Vehicle seat pad and its molding method
JP5320882B2 (en) * 2008-07-23 2013-10-23 株式会社ブリヂストン Vehicle seat pad and method of forming the same
JP5334627B2 (en) * 2009-03-04 2013-11-06 株式会社ブリヂストン Cushion pad mold and cushion pad manufacturing method using the mold
JP5334654B2 (en) * 2009-04-06 2013-11-06 株式会社ブリヂストン Cushion pad mold and cushion pad manufacturing method using the mold
JP2011213084A (en) * 2010-04-02 2011-10-27 Bridgestone Corp Expanded molded member and manufacturing method thereof
JP2015057592A (en) 2013-08-12 2015-03-26 株式会社リコー Information processing device, information processing method, and program
CN111356565B (en) * 2017-10-31 2022-03-15 株式会社普利司通 Foam molded article, method for producing foam molded article, and mold structure for foam molded article

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3464727B2 (en) * 1994-12-29 2003-11-10 株式会社イノアックコーポレーション Manufacturing method of automobile seat back
JP3973101B2 (en) * 2003-10-27 2007-09-12 東海興業株式会社 Method and apparatus for producing foamed molded product and molding auxiliary material
JP2006110166A (en) * 2004-10-15 2006-04-27 Toyo Tire & Rubber Co Ltd Back pad for seat
JP4919640B2 (en) * 2005-09-26 2012-04-18 東洋ゴム工業株式会社 Seat pad and manufacturing method thereof

Also Published As

Publication number Publication date
JP2008023084A (en) 2008-02-07

Similar Documents

Publication Publication Date Title
JP5112654B2 (en) Vehicle seat back pad and method of manufacturing the same
CN101195366B (en) Airbag for front passenger seat for vehicle and manufacturing method thereof
US7967330B2 (en) Crash pad for automotive interior and apparatus for manufacturing the same
JP5865886B2 (en) Method for manufacturing molded body and method for manufacturing vehicle seat material
KR20120061685A (en) Method for munufacturing crash pad for vehicle and crash pad for vehicle by the same
JP5037148B2 (en) Cushion pad manufacturing method
JP5951439B2 (en) Seat back pad and manufacturing method thereof
JP6866740B2 (en) Manufacturing method of seat cushion material and foam mold for manufacturing
JP5691727B2 (en) Foamed synthetic resin molded body and method for producing the same
JP5368832B2 (en) Seat pad mold and seat pad manufacturing method using the mold
JP4884989B2 (en) Cushion pad molding method and cushion pad foaming mold
JP6338450B2 (en) Air distribution duct for seat pad, seat pad with air distribution duct, and manufacturing method thereof
JP3973101B2 (en) Method and apparatus for producing foamed molded product and molding auxiliary material
JP5064770B2 (en) Cushion pad and foam molding die thereof
JP2009072916A (en) Back pad for seat and its manufacturing method
US20130122258A1 (en) Method of manufacturing foam molded product, apparatus for manufacturing foam molded product, and foam molded product
JP5291958B2 (en) Automotive seat back
JP2018089092A (en) Mold of seat pad
JP4687316B2 (en) TRIM PARTS FOR VEHICLE AND METHOD FOR MOLDING THE SAME
KR20090062127A (en) Crash pad for vehicles
JP6482374B2 (en) Cushion pad and manufacturing method thereof
JP4917451B2 (en) Manufacturing method of back pad for seat
JP5779941B2 (en) Foamed synthetic resin molded body and method for producing the same
JP5411462B2 (en) Molding method and mold for vehicle seat pad
JP2008074009A (en) Resin molded article which has shock absorption function, and its molding process

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20090220

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20111017

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20111025

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20111226

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20120703

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20120829

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20120918

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20121011

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20151019

Year of fee payment: 3

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

Ref document number: 5112654

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250