JPH0361569B2 - - Google Patents
Info
- Publication number
- JPH0361569B2 JPH0361569B2 JP13351383A JP13351383A JPH0361569B2 JP H0361569 B2 JPH0361569 B2 JP H0361569B2 JP 13351383 A JP13351383 A JP 13351383A JP 13351383 A JP13351383 A JP 13351383A JP H0361569 B2 JPH0361569 B2 JP H0361569B2
- Authority
- JP
- Japan
- Prior art keywords
- parison
- stay
- mold
- valve
- headrest
- 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.)
- Expired
Links
- 238000000034 method Methods 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000000071 blow moulding Methods 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 4
- 238000002347 injection Methods 0.000 description 7
- 239000007924 injection Substances 0.000 description 7
- 239000006260 foam Substances 0.000 description 4
- 239000011550 stock solution Substances 0.000 description 3
- 238000007872 degassing Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000006261 foam material Substances 0.000 description 1
- 238000010097 foam moulding Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
技術分野
本発明は、パリソンからヘツドレストカバーを
ブロー成形するところのヘツドレストカバーの製
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 for manufacturing a headrest cover, which involves blow molding the headrest cover from a parison.
背景技術
従来、ヘツドレストカバーを製造するにあたつ
ては、円筒状に押出されるパリソンを縦方向で割
腹して内部にステーを突出する芯金を収容した
後、それを金型内に挿置して割腹したパリソンの
三辺を溶着接合すると共に、内部に圧縮空気を吹
込んでヘツドレストカバーとして膨張成形するこ
とが行われている。然し、このヘツドレストカバ
ーでは少なくとも三辺の長い幅に亘つて溶着接合
されているため、その接合個所から剥離を生ずる
可能性が大きく、しかも三辺を金型で挾持するよ
うにしなければならないためパリソンを金型内に
挿置する際極めて手間が掛る欠点もある。BACKGROUND ART Conventionally, in manufacturing a head rest cover, a parison extruded into a cylindrical shape is split vertically to house a core metal from which a stay projects, and then the core metal is inserted into a mold. At the same time, three sides of the parison are welded together and compressed air is blown into the inside to form a headrest cover by expansion molding. However, since this headrest cover is welded and joined over a long width on at least three sides, there is a high possibility that peeling will occur from the joint, and moreover, the three sides must be held between the molds. Another drawback is that it is very time consuming to insert the parison into the mold.
発明の開示
本発明は、パリソンの接合個所を短くして剥離
強度を高めしかも金型内の挿置に手間も掛ること
のないヘツドレストカバーの製造方法を提供する
こと、を目的とする。DISCLOSURE OF THE INVENTION An object of the present invention is to provide a method for manufacturing a head rest cover that increases peel strength by shortening parison joints and does not require time and effort for insertion into a mold.
即ち、本発明に係るヘツドレストカバーの製造
方法においては、パリソンを円筒状のまま下端側
を拡開した略台形状にして金型内に挿置し、上端
側をパリソンの円筒で偏平にしたままの横幅内で
喰切り接合するようにされている。 That is, in the method for manufacturing a headrest cover according to the present invention, the parison is shaped into a substantially trapezoidal shape with its lower end widened while remaining cylindrical, and is inserted into a mold, and the upper end is flattened by the cylinder of the parison. It is designed to cut and join within the original width.
実施例
以下、図面を参照して説明すれば、次の通りで
ある。Embodiments The following description will be made with reference to the drawings.
図示実施例ではパリソンのブロー成形と同一工
程で、その内部にパツト部を発泡成形ししかもス
テーをカバー本体から突出装着することが行われ
ている。 In the illustrated embodiment, in the same process as the blow molding of the parison, a pad part is foam-molded inside the parison, and the stay is mounted so as to protrude from the cover body.
パリソンＰはダイヘツドＤから下端側を開放し
た円筒状にして押出し、そのまま割金型内に挿置
するようにされている。割金型は、圧縮空気の注
入乃至ガス抜きバルブV1、フオーム原液注入バ
ルブV2等を介して対接固定される左右型C1，C2
とを備え、その各対向面にはヘツドレストカバー
の本体を形成するキヤビテイG1や各バルブV1，
V2を受入れる凹溝G2，G3が設けられている。各
バルブV1，V2は金型C1，C2を載置する基台Ｆに
植立装着されており、その各下端側にはエアー注
入乃至吸引パイプ、フオーム材注入パイプ（図示
せず）が連結されている。また、基台Ｆにはステ
ーＳを立付け支持するブラケツトＢが突出装着さ
れ、そのブラケツトＢで支持するステーＳを受入
れ可能に金型C1，C2の各面には蛇腹状に形成し
た凹溝G4が設けられている。このブラケツトＢ
はバルブV1と同様にエアーを注入し或いは後述
するガス抜きの際のバルブとして用いることがで
き、その下端側にもエアー注入乃至吸引パイプが
連結されている。 The parison P is extruded from the die head D into a cylindrical shape with its lower end open, and is inserted into the split mold as it is. The split molds are left and right types C 1 , C 2 which are fixed to each other via a compressed air injection or degassing valve V 1 , a foam stock solution injection valve V 2 , etc.
and a cavity G 1 forming the main body of the headrest cover and each valve V 1 on each opposing surface.
Concave grooves G 2 and G 3 for receiving V 2 are provided. Each of the valves V 1 and V 2 is mounted on a base F on which the molds C 1 and C 2 are mounted, and an air injection or suction pipe and a foam material injection pipe (not shown) are installed at the lower end of each valve. ) are connected. In addition, a bracket B for standing and supporting the stay S is mounted protruding from the base F, and a bellows shape is formed on each surface of the molds C 1 and C 2 so that the stay S supported by the bracket B can be received. A groove G4 is provided. This bracket B
Like the valve V1 , it can be used as a valve for injecting air or for degassing as described later, and an air injection or suction pipe is also connected to its lower end.
この金型を用いては、まずステーＳをブラケツ
トＢに差込んで立付け支持する。そのステーＳは
四辺形のヘツドレストフレームと一体に成形した
２脚のものを用いることができ、またＴ型等の１
脚のものであつてもよい。ステーＳを立付け支持
後、基台Ｆをシリンダ等で上昇動させてパリソン
Ｐの内部にステーＳ並びに各バルブV1，V2を挿
置し、左右型C1，C2でパリソンＰの上下端側を
挾持する。このとき、パリソンＰはヘツドレスト
カバーの本体１を形成する部分以外に各バルブ
V1，V2並びにブラケツトＢまでも包囲する長さ
の余剰部分P1を持たせるよう挿置する。また、
パリソンＰは若干肉厚を大きくししかも通常幅の
ヘツドレストカバーを成形するパリソンP′より狭
幅ｌで狭径の円筒状のものを用い、その下端側を
左右よりバーＡや治具で引張して略台形状に拡開
した状態でステーＳや各バルブV1，V2を受入れ
るようにする。その幅は下端側で左右のバルブ
V1を受入れるに足る寸法t1にし、また上端側でパ
リソンＰを円筒形のままで偏平にした状態に相応
する寸法t2にすればよい。そのパリソンＰ、余剰
部分P1に各バルブV1，V2やステーＳを挿置後、
金型C1，C2でパリソンＰの上端側並びに余剰部
分P1の下端部を型締め挾持したならば、バルブ
V1，V2及びステーＳに設けた溝を介してブラケ
ツトＢから圧縮空気を注入する。そのエアー注入
ではヘツドレストカバーの本体１を膨張成形する
と共に、パリソンＰの余剰部分P1にブロー用空
気孔２とフオーム原液注入孔３に加えてステーＳ
を挿通する蛇腹状筒部４も一体的に形成すること
ができる。その余剰部分P1にはブロー成形時に
金型C1，C2で喰切りラインを入れて事後に蛇腹
状の筒部４を除きカツテイング除去可能にすると
共に、上端側にも喰切りラインを入れて次に用い
るパリソンと切離し可能にする。そのパリソンＰ
のブロー成形後に、バルブV2からウレタン等の
フオーム原液をカバー本体１内に充填して発泡硬
化する。その発泡硬化時にはエアーバルブV1並
びにブラケツトＢが溝を介してが今度はガス抜き
孔として作用し、ステーＳをカバー本体１より突
出して一体装着したパツト部５を形成することが
できる。このパツト部５の発泡成形完了後、金型
C1，C2を型割りすると共に、ブロー成形時に形
成した喰切りラインに沿つて切取ることにより、
カバー本体１を型外しすることができる。 When using this mold, the stay S is first inserted into the bracket B and supported upright. The stay S can be one with two legs molded integrally with a quadrilateral head rest frame, or one with two legs such as a T-shape.
It may also be of the legs. After standing and supporting the stay S, move the base F up with a cylinder or the like to insert the stay S and each valve V 1 , V 2 inside the parison P, and then move the stay S and each valve V 1 , V 2 inside the parison P. Clamp the top and bottom ends. At this time, the parison P includes each valve other than the part forming the main body 1 of the headrest cover.
It is inserted so that it has an extra portion P 1 that is long enough to surround V 1 , V 2 and even the bracket B. Also,
The parison P has a slightly thicker wall and is narrower than the parison P' which is used to form a normal width headrest cover.The parison P is a cylindrical piece with a narrower width l and a narrower diameter. The stay S and the valves V 1 and V 2 are received in a substantially trapezoidal expanded state. Its width is the left and right valves at the bottom end.
It is sufficient to make the dimension t 1 sufficient to accommodate V 1 and the dimension t 2 corresponding to the state in which the parison P is flattened while remaining cylindrical on the upper end side. After inserting each valve V 1 , V 2 and stay S into the parison P and surplus portion P 1 ,
Once the molds C 1 and C 2 have clamped the upper end of the parison P and the lower end of the excess portion P 1 , the valve
Compressed air is injected from bracket B through grooves provided in V 1 , V 2 and stay S. In the air injection, the main body 1 of the headrest cover is expansion molded, and the remaining part P1 of the parison P is filled with a blow air hole 2 and a foam stock solution injection hole 3, as well as a stay S.
The bellows-shaped tube portion 4 through which it is inserted can also be formed integrally. A cut line is made in the excess portion P 1 using the molds C 1 and C 2 during blow molding so that the bellows-shaped cylindrical portion 4 can be removed after the fact and the cutting can be removed, and a cut line is also made on the upper end side. This makes it possible to separate it from the parison that will be used next. That parison P
After blow molding, a foam stock solution such as urethane is filled into the cover body 1 from the valve V 2 and foamed and hardened. When the foam hardens, the air valve V1 and the bracket B act as a gas vent hole through the groove, and the stay S can be formed to protrude from the cover body 1 to form a part 5 integrally attached thereto. After completing the foam molding of this part 5, the mold
By cutting C 1 and C 2 into molds and cutting them out along the cut lines formed during blow molding,
The cover body 1 can be removed from the mold.
発明の効果
以上の如く、本発明に係るヘツドレストカバー
の製造方法に依れば、パリソンを円筒状のままで
金型内に挿置することによりブロー成形するため
溶着接合個所が上下の二辺のみにできしかも上端
側が円筒状のパリソンを偏平にしただけの短い辺
に亘つて溶着すればよいところから剥離強度を大
きくすることができると共に、金型へのパリソン
の組付けも極めて容易にすることができる。Effects of the Invention As described above, according to the method for manufacturing a headrest cover according to the present invention, the parison is blow-molded by inserting the parison in a cylindrical mold, so that the welded joints are formed on the upper and lower sides. In addition, it is possible to increase the peel strength by simply welding the parison, which has a cylindrical upper end, over the short side of the flattened side, and it also makes it extremely easy to assemble the parison into the mold. be able to.
第１図は本発明に係るヘツドレストカバーの製
造方法で用いる金型の分解斜視図、第２図ａは本
発明に係るヘツドレストの製造方法でパリソンを
組付ける工程の説明図、第２図ｂは同組付け後の
パリソンを示す説明図、第３図は本発明に係る方
法で製造したヘツドレストの半製品を示す斜視
図、第４図は同ヘツドレストの完成品を示す斜視
図、第５図ａは別の実施例に係るヘツドレストの
完成品を示す斜視図、第５図ｂは同ヘツドレスト
の側断面図である。
Ｐ：パリソン、C1，C2：金型、t1：下端側の横
幅、t2：上端側の横幅。
FIG. 1 is an exploded perspective view of a mold used in the method for manufacturing a headrest cover according to the present invention, FIG. 3 is an explanatory view showing the parison after assembly, FIG. 3 is a perspective view showing a semi-finished product of the headrest manufactured by the method according to the present invention, FIG. 4 is a perspective view showing a completed product of the headrest, and FIG. 5 FIG. 5a is a perspective view showing a completed product of a headrest according to another embodiment, and FIG. 5b is a side sectional view of the same headrest. P: Parison, C 1 , C 2 : Mold, t 1 : Width on the lower end side, t 2 : Width on the upper end side.
Claims (1)
形するにあたり、パリソンを円筒状のまま下端側
を拡開した略台形状にして金型内に挿置し、上端
側をパリソンの円筒で偏平にしたままの横幅内で
喰切り接合するようにしたことを特徴とするヘツ
ドレストカバーの製造方法。1. When blow molding the headrest cover from the parison, the parison is left cylindrical and the lower end is expanded into a roughly trapezoidal shape and inserted into the mold, and the upper end is flattened by the cylinder of the parison. A method for manufacturing a headrest cover, characterized in that the headrest cover is joined by cutting inside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13351383A JPS6024918A (en) | 1983-07-20 | 1983-07-20 | Manufacture of head rest cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13351383A JPS6024918A (en) | 1983-07-20 | 1983-07-20 | Manufacture of head rest cover |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6024918A JPS6024918A (en) | 1985-02-07 |
| JPH0361569B2 true JPH0361569B2 (en) | 1991-09-20 |
Family
ID=15106535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13351383A Granted JPS6024918A (en) | 1983-07-20 | 1983-07-20 | Manufacture of head rest cover |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6024918A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63290711A (en) * | 1987-05-23 | 1988-11-28 | Tokai Chem Ind Ltd | Manufacture of integral foam molded product with ring structure |
| US6491346B1 (en) | 2000-06-01 | 2002-12-10 | Dow Global Technologies, Inc. | Seating system and method for making the same |
| US6679558B2 (en) * | 2001-07-26 | 2004-01-20 | Lear Corporation | Integral blow-molded, steel reinforced automotive seating structure |
| US7250091B2 (en) | 2003-02-13 | 2007-07-31 | Dow Global Technologies Inc | Method of forming a seating system |
| GB2426482B (en) * | 2005-05-27 | 2010-10-06 | Tachi S Co | Structure of foaming die for forming headrest |
-
1983
- 1983-07-20 JP JP13351383A patent/JPS6024918A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6024918A (en) | 1985-02-07 |
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