JPS6024906A - Manufacture of monolithically foamed molded product - Google Patents

Manufacture of monolithically foamed molded product

Info

Publication number
JPS6024906A
JPS6024906A JP58133514A JP13351483A JPS6024906A JP S6024906 A JPS6024906 A JP S6024906A JP 58133514 A JP58133514 A JP 58133514A JP 13351483 A JP13351483 A JP 13351483A JP S6024906 A JPS6024906 A JP S6024906A
Authority
JP
Japan
Prior art keywords
baffle plate
stay
foaming
headrest
foam material
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.)
Granted
Application number
JP58133514A
Other languages
Japanese (ja)
Other versions
JPH036889B2 (en
Inventor
Hitoo Yoshimura
吉村　仁雄
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.)
TS Tech Co Ltd
Original Assignee
Tokyo Seat Co Ltd
Tokyo Sheet Co Ltd
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 Tokyo Seat Co Ltd, Tokyo Sheet Co Ltd filed Critical Tokyo Seat Co Ltd
Priority to JP58133514A priority Critical patent/JPS6024906A/en
Publication of JPS6024906A publication Critical patent/JPS6024906A/en
Publication of JPH036889B2 publication Critical patent/JPH036889B2/ja
Granted legal-status Critical Current

Links

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
    • B29C44/34—Auxiliary operations
    • B29C44/56—After-treatment of articles, e.g. for altering the shape
    • B29C44/5609—Purging of residual gas, e.g. noxious or explosive blowing agents

Landscapes

  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

PURPOSE:To reduce the occurrence of a void part by guiding and moving the volume transferring accompanied with the foaming of a foam by a baffle plate, while providing the baffle plate on the axis of the supporting member of a stay, etc. CONSTITUTION:The cavity portion where a pad part P is absent occurs easily at a corner part (a) near the rectangular end surface of an upstanding part A with a projecting stay S. Therefore, a rectangular baffle plate B is provided on the stem of the stay S correspondingly to the shape of the transverse section of said upstanding part A. The baffle plate B guides forcibly the foaming flow of foam material to the direction of the corner part. When the foaming flow of the foam material is forcibly moved to the direction of the corner part of the upstanding part A along the baffle plate B, the foaming gas with tendency of staying is moved by pushing and may be exhausted from a suitable bleeder, whereby the pad part P without defects may be molded.

Description

【発明の詳細な説明】 技術分野 本発明は、ヘッドレストカバーと共にフオーム材でバッ
ト部を一体に発泡成形するヘッドレストの如き一体発泡
成形の品製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a method of manufacturing an integrally foamed product such as a headrest, in which a butt part is integrally foam-molded with a headrest cover using a foam material.

背景技術 従来、例えばヘッドレスト等を製造するにあたっては、
゛パリソーンからヘッドレストカバーをブロー成形し、
そのブロー成形時に予めステーの軸上端側をパリソン内
に挿置しておき、ブロー成形後にヘッドレストカバー内
に充填するフオーム材の発泡硬化でバット部を成形して
バット部でステーの軸上端を固着することにより、ヘッ
ドレストカバーとバット部とを一体にしてステーを突出
させたヘッドレストを成形することが行われている。BACKGROUND ART Conventionally, when manufacturing headrests, etc., for example,
゛Blow molding the headrest cover from parisone,
At the time of blow molding, the upper end of the shaft of the stay is inserted into the parison in advance, and after blow molding, the foam material filled in the headrest cover is foamed and hardened to form a butt part, and the upper end of the shaft of the stay is fixed with the butt part. By doing this, the headrest cover and the butt part are integrated to form a headrest with a stay protruding from the headrest cover.

然し、そのヘッドレストではフオーム材が発泡で体積を
増大する際にカバー内の隅角部付近で発泡により押込ま
れてカバー内に存在していた空気と発泡時にフオーム材
に補足されなかった発泡ガスを滞留させて硬化してしま
い、バット部の存在しない空洞部分が生じて商品価値を
著しく損なう事態を招き易い。However, in this headrest, when the foam material expands in volume due to foaming, it is pushed in near the corners of the cover, removing the air that existed inside the cover and the foaming gas that was not captured by the foam material during foaming. This tends to cause the product to stagnate and harden, resulting in the creation of a hollow portion where no butt exists, which can significantly impair commercial value.

発明の開示 本発明は、上述した空洞部分を発生させることなくフオ
ーム材を発泡成形可能な一体発泡成形品の製造方法を提
供することを、目的とする。DISCLOSURE OF THE INVENTION It is an object of the present invention to provide a method for manufacturing an integrally foamed molded product that can be foam-molded without creating the above-mentioned hollow portions.

即ち、本発明に係る一体発泡成形品の製造方法において
は、予め金型のキャビティ内に軸上端側を挿置するステ
ー等の支軸部材の軸線上に邪魔板を装着し、その邪魔板
でフオーム材の発泡に伴う体積移動をキャビティの隅角
部方向に移動案内するようにされている。That is, in the method for manufacturing an integrally foamed molded product according to the present invention, a baffle plate is installed in advance on the axis of a support shaft member such as a stay whose upper end side is inserted into a mold cavity, and the baffle plate The volume movement caused by foaming of the foam material is guided toward the corner of the cavity.

実施例 以下、図面を参照して詳細に説明すれば、次の通りであ
る。Embodiments will now be described in detail with reference to the drawings.

図示実施例では、一体発泡成形品として例えば中央部分
に空隙部を有する略馬蹄形のヘッドレストを製造する場
合が示されいる。このヘッドレストにおいては、ステー
Ｓを突出する立上り部Ａの方形をした端面近く隅角部ａ
でバット部Ｐの存在しない空隙部分を生じ易いため、そ
の立上り部Ａでは横断面形状に応じた方形の邪魔板Ｂを
ステーＳの軸線上に装着し、その邪魔板Ｂで後述するフ
オーム材の発泡流れを隅角部方向に強制的に移動案内す
るようにされている。In the illustrated embodiment, a case is shown in which a substantially horseshoe-shaped headrest having a cavity in the center is manufactured as an integrally formed molded product. In this headrest, a corner portion a near a rectangular end surface of a rising portion A that protrudes from the stay S is
Since this tends to create a gap where the butt part P does not exist, a rectangular baffle plate B corresponding to the cross-sectional shape is installed on the axis of the stay S at the rising part A, and the baffle plate B is used to form the foam material described later. The foaming flow is forcibly guided in the direction of the corner.

邪魔板Ｂとしては硬質、半硬質の樹脂プレートや金属板
を用いるこ、とができ、また多孔質の板材でフオーム材
を透過させて移動案内するものを用いてもよい。また、
ヘッドレスト本体の成形にあったてはパリソンからヘッ
ドレストカバーＣをブロー成形した後内部にフオーム材
を充填して発泡硬化することによりバット部Ｐを成形し
てもよく、また金型のキャビティ内にステーＳの軸上端
側を挿置してヘッドレストカバーＣと共にバット部Ｐを
同時に発泡成形するインテグラルウレタン発泡を適用す
ることもできる。As the baffle plate B, a hard or semi-hard resin plate or a metal plate can be used, or a porous plate material that allows the foam material to pass through and guide the movement. Also,
When molding the headrest body, the butt part P may be molded by blow-molding the headrest cover C from the parison and then filling the inside with foam material and foaming and hardening. It is also possible to apply integral urethane foaming in which the upper end of the shaft of S is inserted and the headrest cover C and butt part P are foam-molded at the same time.

ブロー成形を適用する場合、まずパリソンをダイヘッド
から下端側を開放した筒状にして押出し、それを金型内
に挿置することにより圧縮空気の吹込みでヘッドレスト
カバーＣを成形する。その際、パリソン内には邪魔板Ｂ
を装着したステーＳの軸上端側を・、金型のキャビティ
内に予め挿置し、邪魔板Ｂを内部に収容したヘッドレス
トカバーＣを形成する。このカバーＣ内に収容する邪魔
板Ｂはヘッドレストの立上り部Ａの平面積より３〜５■
程度狭帽なものを装着し、また多孔質の板材では略同面
積を持つものを用いることができる６次に、ヘッドレス
トカバーＣの一部に形成した開孔からフオーム材をカバ
ー内に充填し、同一工程でバット部Ｐを発泡成形する。When blow molding is applied, first, a parison is extruded from a die head into a cylindrical shape with its lower end open, and the parison is inserted into a mold to form the headrest cover C by blowing compressed air. At that time, there is a baffle board B inside the parison.
The upper end of the shaft of the stay S equipped with the stay S is previously inserted into the cavity of the mold to form a headrest cover C in which the baffle plate B is housed. The baffle plate B accommodated in this cover C is 3 to 5 cm larger than the planar area of the rising part A of the headrest.
A porous plate material with approximately the same area can be used.Next, fill the foam material into the cover through the opening formed in a part of the headrest cover C. , the butt part P is foam-molded in the same process.

フオーム材はウレタン原液の発泡に伴って徐々に体積を
増大するが、邪魔板Ｂの近くになると、′それを迂回す
ることにより立上り部Ａの隅角部方向に急速に移動しま
たは多孔質の邪魔板Ｂでは板材を透過して挟間内で立上
り部Ａの隅角部方向に移動する。その際、発泡ガスはス
テーＳを挿置したヘッドレストカバーＣとの隙間から外
に排出するようにでき、またステーＳの軸線に凹溝を形
成し或いはヘッドレストカバーＣの略中央部分に形成し
たガス抜き孔から排出するようにできる。The foam material gradually increases in volume as the urethane stock solution foams, but when it gets close to the baffle plate B, it rapidly moves toward the corner of the rising part A by bypassing it, or the porous material In the baffle plate B, the light passes through the plate material and moves in the direction of the corner of the rising portion A within the gap. At that time, the foaming gas can be discharged outside through the gap between the stay S and the headrest cover C, and a groove can be formed on the axis of the stay S, or the gas can be discharged from the gap formed in the center of the headrest cover C. It can be discharged through a hole.

このようにして邪魔板Ｂに沿ってフオーム材の発泡流れ
を強制的に立上り部Ａの隅角部方向に移動すれば、滞留
し易い発泡ガスを抑圧移動して適宜のガス抜き個所より
排出できるため、欠損部のないバット部Ｐを形成するこ
とができる。なお、邪魔板Ｂは上述した如くヘッドレス
トカバーＣの成形時に予め装着配置してもよいが、ヘッ
ドレストカバーＣの成形後にもステーＳに装着すること
もできる。また、ヘッドレストは略馬蹄形のものに限ら
ず、通常の台形のものであっても下面側の隅角部でバッ
ト部に空隙部分を生じないよう一枚の大きな邪魔板を装
着配置することもできる。更に、上述した実施例ではヘ
ッドレストを製造する場合を示したが、それ以外に表皮
材内にフオーム材を一体発泡する如き製品を成形する場
合に広く適用できるものである。In this way, by forcibly moving the foaming flow of the foam material toward the corner of the rising portion A along the baffle plate B, the foaming gas that tends to stay can be suppressed and moved and discharged from an appropriate gas release point. Therefore, it is possible to form a butt portion P without any defective portions. Note that the baffle plate B may be installed and arranged in advance when the headrest cover C is molded as described above, but it can also be installed on the stay S after the headrest cover C is molded. In addition, the headrest is not limited to a substantially horseshoe-shaped headrest; even if it is a normal trapezoidal one, a large baffle plate can be installed at the bottom corner to prevent a gap from forming in the butt part. . Furthermore, although the above-described embodiments show the case of manufacturing a headrest, the present invention can be widely applied to other products such as integrally foaming a foam material within a skin material.

発明の効果 以上の如く、本発明に係る一体発泡成形品の製造方法に
依れば、フオーム材の発泡流れを邪魔板で狭路から急速
に挟間部分に移動案内することにより滞留し易い発泡ガ
スを強制的に押圧して隅角部でもフオーム材を充填でき
るためバット部に欠損を生じ゛させないようにでき、し
かもヘッドレストの如き製品を製造する場合には邪魔板
を支持板としてステー等の支軸部材をバット部と強固に
−体固着することができる。Effects of the Invention As described above, according to the method for manufacturing an integrally foamed molded product according to the present invention, the foaming flow of the foam material is rapidly moved and guided from the narrow passage to the sandwiched portion by the baffle plate, thereby eliminating the foaming gas that tends to stagnate. Since the foam material can be filled even in the corners by forcibly pressing the foam material, it is possible to prevent damage to the butt part, and when manufacturing products such as headrests, the baffle plate can be used as a support plate for supporting stays, etc. The shaft member can be firmly fixed to the butt part.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明で製造する一体発泡成形品の一例として
ヘッドレストを示す斜視図、第２図は同ヘッドレストの
製造で問題点を示す説明図、第３は本発明に係る一体発
泡成形品の製造方法を示す一部拡大説明図、第４図は別
の実施例を示す説明図である。 Ｃ：ヘッドレスト力バー、Ｐ：バット部、ａ：隅角部、
Ｓニスチー等の支軸部材、Ｂ：邪魔板。Fig. 1 is a perspective view showing a headrest as an example of the integrally foamed molded product manufactured by the present invention, Fig. 2 is an explanatory view showing problems in manufacturing the same headrest, and Figure 3 is an illustration of the integrally foamed molded product according to the present invention. FIG. 4 is a partially enlarged explanatory view showing the manufacturing method, and is an explanatory view showing another embodiment. C: Headrest force bar, P: Butt part, a: Corner part,
Support shaft member such as S Nischi, B: baffle plate.

Claims (1)

【特許請求の範囲】[Claims] 予め金型のキャビティ内にステーの軸上端側を挿置した
後、ヘッドレストカバーと共にフオーム材でバット部を
発泡成形し、そのバット部の発泡硬化でステーをヘッド
レストカバーから突出させて一体固着する如きヘッドレ
スト等の一体発泡成形品を製造するにあたり、上記ステ
ー等の支軸部材の軸線上に邪魔板を装着し、その邪魔板
でフオーム材の発泡流れをキャビティの隅角部方向に移
動案内するようにしたことを特徴とする一体発泡成形品
の製造方法。After inserting the upper end of the shaft of the stay into the cavity of the mold in advance, the butt part is foam-molded with a foam material together with the headrest cover, and when the butt part is foamed and hardened, the stay protrudes from the headrest cover and is fixed together. When manufacturing an integrally foamed molded product such as a headrest, a baffle plate is installed on the axis of the support shaft member such as the stay, and the baffle plate guides the foam flow of the foam material toward the corner of the cavity. A method for producing an integrally foamed molded product.
JP58133514A 1983-07-20 1983-07-20 Manufacture of monolithically foamed molded product Granted JPS6024906A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58133514A JPS6024906A (en) 1983-07-20 1983-07-20 Manufacture of monolithically foamed molded product

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58133514A JPS6024906A (en) 1983-07-20 1983-07-20 Manufacture of monolithically foamed molded product

Publications (2)

Publication Number Publication Date
JPS6024906A true JPS6024906A (en) 1985-02-07
JPH036889B2 JPH036889B2 (en) 1991-01-31

Family

ID=15106562

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58133514A Granted JPS6024906A (en) 1983-07-20 1983-07-20 Manufacture of monolithically foamed molded product

Country Status (1)

Country Link
JP (1) JPS6024906A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4908170A (en) * 1987-05-23 1990-03-13 Tokai Chemical Industries, Ltd. Method of producing an annular foam product
US5004572A (en) * 1987-11-20 1991-04-02 Tokai Chemical Industries, Ltd. Method of producing skin tube for annular foam product, and assembly of the skin tube and core structure
US5190707A (en) * 1990-10-30 1993-03-02 Ikeda Bussan Co., Ltd. Method of molding skin-covered foamed article
US5984414A (en) * 1997-12-31 1999-11-16 Tachi-S Co., Ltd. Headrest

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56135824U (en) * 1980-03-13 1981-10-15
JPS5890936A (en) * 1981-11-27 1983-05-30 Mitsubishi Plastics Ind Ltd Manufacture of blank board for furniture or the like

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56135824U (en) * 1980-03-13 1981-10-15
JPS5890936A (en) * 1981-11-27 1983-05-30 Mitsubishi Plastics Ind Ltd Manufacture of blank board for furniture or the like

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4908170A (en) * 1987-05-23 1990-03-13 Tokai Chemical Industries, Ltd. Method of producing an annular foam product
US5004572A (en) * 1987-11-20 1991-04-02 Tokai Chemical Industries, Ltd. Method of producing skin tube for annular foam product, and assembly of the skin tube and core structure
US5190707A (en) * 1990-10-30 1993-03-02 Ikeda Bussan Co., Ltd. Method of molding skin-covered foamed article
US5984414A (en) * 1997-12-31 1999-11-16 Tachi-S Co., Ltd. Headrest

Also Published As

Publication number Publication date
JPH036889B2 (en) 1991-01-31

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