JP3383020B2 - Manufacturing method of hollow resin molded product - Google Patents

Manufacturing method of hollow resin molded product

Info

Publication number
JP3383020B2
JP3383020B2 JP20954993A JP20954993A JP3383020B2 JP 3383020 B2 JP3383020 B2 JP 3383020B2 JP 20954993 A JP20954993 A JP 20954993A JP 20954993 A JP20954993 A JP 20954993A JP 3383020 B2 JP3383020 B2 JP 3383020B2
Authority
JP
Japan
Prior art keywords
molded body
internal
external
hollow resin
showing
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 - Fee Related
Application number
JP20954993A
Other languages
Japanese (ja)
Other versions
JPH0763130A (en
Inventor
秀伸 宮嶋
Original Assignee
旭テック株式会社
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Filing date
Publication date
Application filed by 旭テック株式会社 filed Critical 旭テック株式会社
Priority to JP20954993A priority Critical patent/JP3383020B2/en
Publication of JPH0763130A publication Critical patent/JPH0763130A/en
Application granted granted Critical
Publication of JP3383020B2 publication Critical patent/JP3383020B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/24—Lining or labelling
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/24—Lining or labelling
    • B29C2049/2404—Lining or labelling inside the article
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/24—Pipe joints or couplings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
    • F05C2225/08—Thermoplastics

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Description

【発明の詳細な説明】 【０００１】 【産業上の利用分野】本発明は自動車用のインテークマ
ニホールドに使用する合成樹脂製マニホールド等中空樹
脂成形品の製造方法に係り、特に、中空樹脂成形品を構
成する内部成形体と外部成形体とを密着して一体化する
ようにしたものに関する。 【０００２】 【従来の技術】中空樹脂成形品の一種として、自動車用
のインテークマニホールドに使用する合成樹脂製マニホ
ールドがある。このものは、ガス吸入部と、シリンダヘ
ッド接合部と、両部分を接続する分岐管とを一体化した
複雑な形状を有するものである。そして、その製造方法
としては従来、次のような方法がある。 【０００３】まず、マニホールド中空部の所定形状をな
す内部成形体をブロー成形等により一体形成する。又、
マニホールドの外部の所定形状をなす外部成形体を成形
する。これは例えば、マニホールドの外部の所定形状を
なし複数に分割された外部成形体要素をインジェクショ
ン成形等により形成する。これらはいずれも合成樹脂製
であり、上記内部成形体に上記外部成形体要素を接着又
は溶着により一体化する。これにより、中空部内面に障
害部分がない合成樹脂製マニホールドが製造される。 【０００４】 【発明が解決しようとする課題】上記従来の構成による
と次のような問題があった。まず、内部成形体と外部成
形体を合成樹脂で形成し、これらを接着又は溶着により
一体化する場合、内部成形体と外部成形体とが密着せず
隙間が生じてしまうという問題がある。すなわち、図１
２に示すように、内部成形体１０１と外部成形体１０３
とが密着せず隙間１０５があると、インテークマニホー
ルドの場合には、マニホールド内部が負圧となるので振
動を生じる原因となる。又、内部成形体１０１と外部成
形体１０３との間に隙間１０５があると、図中一点鎖線
で示すように、負圧によって内部成形体１０１が変形し
て凹部を生じる余地が生じ、そのためマニホールドの内
面に不必要な凹部や凸部（障害部分）が生じてしまうと
いう問題があった。 【０００５】本発明はこのような点に基づいてなされた
ものでその目的とするところは、内部成形体と外部成形
体とを密着させて一体化することができる中空樹脂成形
品の製造方法を提供することにある。 【０００６】 【課題を解決するための手段】上記目的を達成するべく
本願発明による中空樹脂成形品の製造方法は、中空樹脂
成形品の外部の所定形状をなし複数に分割された外部成
形体要素を形成し、中空樹脂成形品の中空部の所定形状
とほぼ同一又は小形の形状をなす内部成形体を形成し、
上記内部成形体を内部に挿入した状態で複数の外部成形
体要素同士を接着又は溶着により接合し、次に内部成形
体を加熱して軟化させるとともに内部を加圧して内部成
形体を外部成形体に密着させて一体化することを特徴と
するものである。 【０００７】 【作用】まず、中空樹脂成形品の外部の所定形状をなす
外部成形体を形成する。これは、例えば、インジェクシ
ョン成形等により、複数に分割された外部成形体要素を
成形してこれを接着又は溶着することにより形成する。
尚、ここで形成される外部成形体の内部形状は中空樹脂
成形品の内部の所定形状とほぼ同一か又は内部成形体の
厚みを考慮してこの厚み分肉薄に形成される。又、中空
樹脂成形品の中空部の所定形状とほぼ同一又は小形の形
状をなす内部成形体をブロー成形等により一体形成す
る。次に、上記内部成形体を内部に挿入した状態で複数
の外部成形体要素同士を接着又は溶着により接合して外
部成形体を形成する。次に、内部成形体を加熱して軟化
させるとともに内部を加圧して内部成形体を外部成形体
に密着させて一体化する。これにより、外部成形体が複
数に分割された外部成形体要素同士を接着又は溶着によ
り接合したものでも、内部に挿入された内部成形体が外
部成形体と密着して隙間のない中空樹脂成形品が製造さ
れるものであり、中空部内面に障害部分がない製品が製
造される。 【０００８】 【実施例】以下、図１乃至図１１を参照して本発明の一
実施例を説明する。図１は合成樹脂製マニホールドの工
程部品を示すものであり、外部成形体１としての外部成
形体要素３、５と内部成形体７とにより構成される。ま
ず、外部成形体１であるが、このものはマニホールドの
外部の所定形状をなし複数に分割された外部成形体要素
３、５からなる。本実施例では、外部成形体要素３、５
は、マニホールドの流通方向に沿って二分割されてお
り、その外面はマニホールドの外面の所定形状に形成さ
れ、内面はマニホールド内部の所定形状とほぼ同一か又
は内部成形体７の厚みを考慮してこの厚み分肉薄に形成
される。このものはインジェクション成形により形成さ
れるものであり、図２乃至図３に示すように、上型９と
下型１１との間に形成された空間１３に樹脂１５を注入
する。これにより、所定形状の外部成形体要素３、５を
形成する。 【０００９】次に、図１に示す内部成形体７を形成す
る。このものはマニホールド中空部の所定形状とほぼ同
一又はそれより小形に形成されるものであり、ブロー成
形により一体成形される。すなわち、図４に示すよう
に、一対のブロー成形型１７（図中では一方のみ示す）
の間にマニホールド中空部の内面形状をなす空間部１９
を形成し、有底筒状のパリソンを上記ブロー成形型１７
の間にはさみこんでブロー口２１より空気等を注入す
る。これにより、パリソンを空間部１９の形状に沿って
膜状に成形し内部成形体７を形成する。 【００１０】次に、図５乃至図６に示すように、上記内
部成形体７を内部に挿入した状態で、一対の外部成形体
要素３、５同士を接合面に接着剤を塗布した状態で重ね
合わせて一体化させる。尚、接合面を溶着して一体化し
てもよい。これにより、上記外部成形体１内に内部成形
体７が配置される。この状態で、図７乃至図８に示すよ
うに、内部成形体７のブロー口２１より熱風を送り込
み、内部成形体７を加熱して軟化させるとともに内圧に
より膨張させて、内部成形体７を外部成形体１に密着さ
せる。尚、図９乃至図１０に示すように、外部成形体１
に異形部２３がある場合、接着等の手段では内部成形体
７と外部成形体１との全体を隙間なく密着させることが
困難であるが、加熱して軟化させ加圧して密着させる方
法では両者を隙間なく密着させることができる。これに
より、図１１に示すように、内部成形体７と外部成形体
１とが密着して一体化され、隙間のない中空樹脂成形品
２５が製造される。 【００１１】以上本実施例によると次のような効果を奏
することができる。まず、内部成形体７と外部成形体１
とが密着し、それらの間に隙間のない中空樹脂成形品を
製造することができる。したがって、合成樹脂製マニホ
ールドのような製品を製造する場合、内部成形体と外部
成形体との密着性が良いので、マニホールド内部が負圧
になっても、振動が生じることがなく、又、内部成形体
と外部成形体とが全体に密着しているので、負圧によっ
ても変形を生することがなく内面に凹凸部のような障害
部分のない高品質のものが得られる。 【００１２】尚、本発明は上記一実施例に限定されるも
のではない。例えば、本実施例では、外部成形体１とし
ての外部成形体要素３、５はマニホールドの流通方向に
沿って二分割したが、何分割するかは任意であり、又、
分割方法も任意である。又、中空樹脂成形品としては種
々の形状のものがあり、内部成形体が挿入できる形状の
ものの場合は外部成形体１は中空状のものを一体形成し
たものでもよい。 【００１３】又、内部成形体７はブロー成形により成形
したが、真空成形等の方法で成形しても良い。又、内部
成形体７は膜状のものを示したが、加熱により軟化し加
圧により膨張し得るものであれば厚さは任意である。 【００１４】又、内部成形体を加熱し内部を加圧する手
段としては、加熱した空気を送り込む方法のほか、種々
のものが考えられる。例えば、加熱した水や油を送り込
む方法がある。又、マイクロウエーブ加熱を利用する方
法として、内部成形体内にアルミニウム等の金属粉や金
属繊維を入れ、マイクロウエーブを照射して内部成形体
のみを加熱し、内部に空気、水、油等の流体または流動
体を送り込んで加圧する方法がある。 【００１５】 【発明の効果】以上詳述したように本発明による中空樹
脂成形品の製造方法によると、内部成形体と外部成形体
とを密着させて一体化することができるので、内部成形
体と外部成形体の間に隙間がなく、内面に凹凸等の障害
部分のない製品を製造することができる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a hollow resin molded product such as a synthetic resin manifold used for an intake manifold for an automobile, and more particularly to a method of manufacturing a hollow resin molded product. The present invention relates to a structure in which an inner molded body and an outer molded body are tightly integrated. [0002] As one type of hollow resin molded product, there is a synthetic resin manifold used for an intake manifold for an automobile. This has a complicated shape in which a gas suction part, a cylinder head joint part, and a branch pipe connecting both parts are integrated. Conventionally, there are the following methods for manufacturing the same. First, an internal molded body having a predetermined shape in a hollow portion of a manifold is integrally formed by blow molding or the like. or,
An external molded body having a predetermined shape is formed outside the manifold. For example, an external molded body element having a predetermined shape outside the manifold and divided into a plurality of parts is formed by injection molding or the like. These are all made of synthetic resin, and integrate the external molded body element with the internal molded body by bonding or welding. Thus, a synthetic resin manifold having no obstruction on the inner surface of the hollow portion is manufactured. [0004] According to the above-mentioned conventional configuration, there are the following problems. First, when the inner molded body and the outer molded body are formed of a synthetic resin and are integrated by bonding or welding, there is a problem that the inner molded body and the outer molded body do not adhere to each other and a gap is generated. That is, FIG.
As shown in FIG. 2, the inner molded body 101 and the outer molded body 103
If there is a gap 105 without close contact, in the case of an intake manifold, a negative pressure is generated inside the manifold, which causes vibration. Also, if there is a gap 105 between the inner molded body 101 and the outer molded body 103, as shown by a dashed line in the figure, the inner molded body 101 is deformed by the negative pressure, so that there is room for forming a concave portion. However, there is a problem that unnecessary concave portions and convex portions (obstructed portions) are generated on the inner surface. The present invention has been made based on such a point, and an object of the present invention is to provide a method for manufacturing a hollow resin molded article capable of bringing an inner molded body and an outer molded body into close contact and integrating them. To provide. [0006] Production method of hollow resin molded article according to the present invention in order to achieve the above object, according to an aspect of an external formation that is divided into a plurality without external predetermined shape of the hollow molded article
Forming a shape element , forming an internal molded body having a shape substantially the same as or smaller than the predetermined shape of the hollow portion of the hollow resin molded product,
Multiple external moldings with the internal molded body inserted inside
The body elements are joined by bonding or welding , and then the inner molded body is heated and softened, and the inner molded body is pressed against the inner molded body and brought into close contact with the outer molded body to be integrated. . First, an external molded body having a predetermined shape outside the hollow resin molded article is formed. This is formed, for example, by molding an external molded body element divided into a plurality of parts by injection molding or the like, and bonding or welding this.
The internal shape of the external molded body formed here is almost the same as the predetermined shape inside the hollow resin molded product, or is formed thinner by this thickness in consideration of the thickness of the internal molded body. Further, an internal molded body having a shape substantially the same as or smaller than the predetermined shape of the hollow portion of the hollow resin molded product is integrally formed by blow molding or the like. Next, with the above-mentioned internal molded body inserted inside,
The outer molded body elements of
A partially formed body is formed . Next, the inner molded body is heated and softened, and the inside is pressurized to bring the inner molded body into close contact with the outer molded body to be integrated. As a result, the external molded body elements obtained by dividing the external molded body into a plurality of parts are bonded or welded to each other.
It is those bonded Ri, internal molded body that is inserted into the outer
A hollow resin molded product with no gaps
Is what is, in the hollow inner surface there is no hindrance moiety product is produced. An embodiment of the present invention will be described below with reference to FIGS. 1 to 11. FIG. 1 shows process parts of a synthetic resin manifold, which is constituted by external molded body elements 3 and 5 as an external molded body 1 and an internal molded body 7. First, the outer molded body 1 is formed of a plurality of divided outer molded body elements 3 and 5 having a predetermined shape outside the manifold. In this embodiment, the external molded body elements 3, 5
Is divided into two along the flow direction of the manifold, the outer surface of which is formed in a predetermined shape on the outer surface of the manifold, and the inner surface is substantially the same as the predetermined shape inside the manifold or the thickness of the internal molded body 7 is taken into consideration. It is formed as thin as this thickness. This is formed by injection molding, and a resin 15 is injected into a space 13 formed between the upper mold 9 and the lower mold 11 as shown in FIGS. Thus, the external molded body elements 3 and 5 having a predetermined shape are formed. Next, an internal compact 7 shown in FIG. 1 is formed. This is substantially the same as or smaller than the predetermined shape of the hollow portion of the manifold, and is integrally formed by blow molding. That is, as shown in FIG. 4, a pair of blow molds 17 (only one is shown in the figure)
A space 19 between the inside of the hollow portion of the manifold.
And the bottomed cylindrical parison is blow-molded
Air or the like is injected from the blow port 21 by being sandwiched between them. Thus, the parison is formed into a film shape along the shape of the space portion 19 to form the internal molded body 7. Next, as shown in FIGS. 5 and 6, in a state where the internal molded body 7 is inserted inside, a pair of external molded body elements 3 and 5 are bonded to each other with an adhesive applied to a joint surface. Overlap and integrate. The joining surfaces may be welded and integrated. Thereby, the inner molded body 7 is arranged in the outer molded body 1. In this state, as shown in FIGS. 7 and 8, hot air is sent from the blow port 21 of the internal molded body 7 to heat and soften the internal molded body 7 and expand the internal molded body 7 by the internal pressure. It is brought into close contact with the molded body 1. In addition, as shown in FIGS.
When there is a deformed portion 23, it is difficult to adhere the whole of the inner molded body 7 and the outer molded body 1 without any gap by means of adhesion or the like. Can be brought into close contact with no gap. As a result, as shown in FIG. 11, the inner molded body 7 and the outer molded body 1 are tightly integrated with each other, and a hollow resin molded article 25 having no gap is manufactured. According to this embodiment, the following effects can be obtained. First, the inner molded body 7 and the outer molded body 1
And a hollow resin molded product having no gap between them can be manufactured. Therefore, when manufacturing a product such as a synthetic resin manifold, since the internal molded body and the external molded body have good adhesion, even if the inside of the manifold becomes a negative pressure, no vibration occurs, Since the molded body and the external molded body are in close contact with each other, a high-quality molded article that does not deform even by negative pressure and has no obstruction such as an uneven portion on the inner surface can be obtained. The present invention is not limited to the above embodiment. For example, in the present embodiment, the external molded body elements 3 and 5 as the external molded body 1 are divided into two parts along the flow direction of the manifold, but the number of divisions is arbitrary.
The dividing method is also arbitrary. Also, there are various shapes of hollow resin molded products, and in the case of a shape into which an internal molded product can be inserted, the external molded product 1 may be formed integrally with a hollow product. Although the inner molded body 7 is formed by blow molding, it may be formed by a method such as vacuum forming. Although the internal molded body 7 is shown as a film, the thickness is arbitrary as long as it can be softened by heating and expanded by pressure. As means for heating the internal molded body and pressurizing the inside, various methods can be considered in addition to the method of feeding heated air. For example, there is a method of feeding heated water or oil. In addition, as a method of utilizing microwave heating, a metal powder such as aluminum or a metal fiber is put into an internal molded body, and only the internal molded body is heated by irradiating a microwave, and a fluid such as air, water, oil, or the like is contained inside. Alternatively, there is a method in which a fluid is fed and pressurized. As described in detail above, according to the method for manufacturing a hollow resin molded article of the present invention, the internal molded article and the external molded article can be brought into close contact with each other and integrated, so that the internal molded article can be obtained. It is possible to manufacture a product having no gap between the outer molded body and the outer molded body and having no obstruction such as unevenness on the inner surface.

【図面の簡単な説明】 【図１】本発明の一実施例を示す図で内部成形体と外部
成形体の構成を示す斜視図である。 【図２】本発明の一実施例を示す図で外部成形体要素の
成形型を示す断面図である。 【図３】本発明の一実施例を示す図で一対の外部成形体
要素を示す断面図である。 【図４】本発明の一実施例を示す図で内部成形体の成形
型を示す断面図である。 【図５】本発明の一実施例を示す図で外部成形体内に内
部成形体を配置した状態を示す断面図である。 【図６】本発明の一実施例を示す図で外部成形体内に内
部成形体を配置した状態を示す断面図である。 【図７】本発明の一実施例を示す図で内部成形体を加熱
し内部を加圧し外部成形体と一体化した状態を示す断面
図である。 【図８】本発明の一実施例を示す図で内部成形体を加熱
し内部を加圧し外部成形体と一体化した状態を示す断面
図である。 【図９】本発明の一実施例を示す図で異形部分を有する
外部成形体内に内部成形体を配置した状態を示す断面図
である。 【図１０】本発明の一実施例を示す図で内部成形体を加
熱し内部を加圧して異形部分を有する外部成形体と一体
化した状態を示す断面図である。 【図１１】本発明の一実施例を示す図で完成した中空樹
脂成形品を示す斜視図である。 【図１２】従来例を示す図で内部成形体が外部成形体内
部成形体で変形する状態を示す断面図である。 【符号の説明】 １外部成形体 ３外部成形体要素 ５外部成形体要素 ７内部成形体BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing one embodiment of the present invention, and is a perspective view showing a configuration of an inner molded body and an outer molded body. FIG. 2 is a view showing one embodiment of the present invention, and is a cross-sectional view showing a molding die of an external molded body element. FIG. 3 is a cross-sectional view illustrating a pair of external molded body elements according to an embodiment of the present invention. FIG. 4 is a view showing one embodiment of the present invention, and is a cross-sectional view showing a molding die of an internal molded body. FIG. 5 is a view showing one embodiment of the present invention, and is a cross-sectional view showing a state in which an inner molded body is arranged in an outer molded body. FIG. 6 is a view showing one embodiment of the present invention, and is a cross-sectional view showing a state in which an inner molded body is disposed inside an outer molded body. FIG. 7 is a view showing one embodiment of the present invention, and is a cross-sectional view showing a state in which the inner molded body is heated and pressurized inside to be integrated with the outer molded body. FIG. 8 is a view showing one embodiment of the present invention, and is a cross-sectional view showing a state in which the inner molded body is heated and pressurized inside to be integrated with the outer molded body. FIG. 9 is a view showing one embodiment of the present invention, and is a cross-sectional view showing a state in which an inner molded body is arranged in an outer molded body having a deformed portion. FIG. 10 is a view showing an embodiment of the present invention, and is a cross-sectional view showing a state in which an inner molded body is heated and pressurized to integrate the inner molded body with an outer molded body having a deformed portion. FIG. 11 is a perspective view showing a completed hollow resin molded article according to the embodiment of the present invention. FIG. 12 is a cross-sectional view showing a conventional example and showing a state in which an internal molded body is deformed by an external molded body and an internal molded body. [Description of Signs] 1 External molded body 3 External molded body element 5 External molded body element 7 Internal molded body

フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｂ２９Ｌ 22:00 Ｂ２９Ｌ 31:30 31:30 Ｆ０２Ｍ 35/10 １０２Ｎ Continued on the front page (51) Int.Cl. 7 Identification code FI B29L 22:00 B29L 31:30 31:30 F02M 35/10 102N

Claims (1)

(57)【特許請求の範囲】 【請求項１】中空樹脂成形品の外部の所定形状をなし複
数に分割された外部成形体要素を形成し、中空樹脂成形
品の中空部の所定形状とほぼ同一又は小形の形状をなす
内部成形体を形成し、上記内部成形体を内部に挿入した
状態で複数の外部成形体要素同士を接着又は溶着により
接合し、次に内部成形体を加熱して軟化させるとともに
内部を加圧して内部成形体を外部成形体に密着させて一
体化することを特徴とする中空樹脂成形品の製造方法。(57) Patent Claims 1. A multi a hollow resin molded article of the outside of a predetermined shape
The external molded body element divided into a number was formed, an internal molded body having a shape substantially the same as or smaller than the predetermined shape of the hollow portion of the hollow resin molded product was formed, and the internal molded body was inserted inside.
In the state, multiple external molded body elements are bonded or welded together
A method for producing a hollow resin molded product, comprising joining , then heating and softening the internal molded body, and pressurizing the inside to bring the internal molded body into close contact with the external molded body to integrate them.
JP20954993A 1993-08-24 1993-08-24 Manufacturing method of hollow resin molded product Expired - Fee Related JP3383020B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20954993A JP3383020B2 (en) 1993-08-24 1993-08-24 Manufacturing method of hollow resin molded product

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20954993A JP3383020B2 (en) 1993-08-24 1993-08-24 Manufacturing method of hollow resin molded product

Publications (2)

Publication Number Publication Date
JPH0763130A JPH0763130A (en) 1995-03-07
JP3383020B2 true JP3383020B2 (en) 2003-03-04

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP20954993A Expired - Fee Related JP3383020B2 (en) 1993-08-24 1993-08-24 Manufacturing method of hollow resin molded product

Country Status (1)

Country Link
JP (1) JP3383020B2 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6439586B2 (en) * 2015-05-27 2018-12-19 トヨタ紡織株式会社 Fixing the intake port liner

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