JP2946773B2 - Manufacturing method of hollow molded products - Google Patents
Manufacturing method of hollow molded productsInfo
- Publication number
- JP2946773B2 JP2946773B2 JP1114291A JP1114291A JP2946773B2 JP 2946773 B2 JP2946773 B2 JP 2946773B2 JP 1114291 A JP1114291 A JP 1114291A JP 1114291 A JP1114291 A JP 1114291A JP 2946773 B2 JP2946773 B2 JP 2946773B2
- Authority
- JP
- Japan
- Prior art keywords
- resin
- inner layer
- forming
- cavity
- hollow
- 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
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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
- B29C33/52—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles soluble or fusible
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1642—Making multilayered or multicoloured articles having a "sandwich" structure
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
- B29C45/44—Removing or ejecting moulded articles for undercut articles
- B29C45/4457—Removing or ejecting moulded articles for undercut articles using fusible, soluble or destructible cores
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
- Treatments Of Macromolecular Shaped Articles (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、自動車の両サイドに装
着されるサイドモール等の中空成形品の製造方法に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a hollow molded article such as a side molding mounted on both sides of an automobile.
【０００２】[0002]
【従来の技術】従来、サイドモール等の中空成形品の製
造方法としては、ブロー成形法やガス注入射出成形法が
採用されている。ブロー成形法では、所定の筒状のパリ
ソンを金型内に配置し、パリソン内にエアを吹き込んで
金型に密着させることにより中空成形品が得られる。ガ
ス注入射出成形法では、成形品形状を有するキャビティ
内に溶融した樹脂を射出するとともに、エアを供給して
成形品内部に空洞を形成することにより、中空成形品が
得られる。2. Description of the Related Art Conventionally, a blow molding method and a gas injection injection molding method have been adopted as a method for producing a hollow molded product such as a side molding. In the blow molding method, a hollow cylindrical product is obtained by disposing a predetermined cylindrical parison in a mold and blowing air into the parison to make the parison adhere to the mold. In the gas injection injection molding method, a hollow molded article is obtained by injecting a molten resin into a cavity having a molded article shape and supplying air to form a cavity inside the molded article.
【０００３】[0003]
【発明が解決しようとする課題】ところが、前記ブロー
成形法によって得られる中空成形品は、パリソンの厚さ
が均一でないためパリソン全体に均一にエアの圧力が加
わらず、金型への密着度が異なり、金型の形状に十分に
追従できない部分が生ずる。そのため、外観が不良とな
り、サイドモール等の外観を重視する製品としては好ま
しくないという問題点があった。また、ガス注入射出成
形法によって得られる中空成形品は、エアによって直接
中空部を形成するため、肉厚が均一とならず、肉厚の厚
い部分ではヒケが生じ、外観が不良となる可能性がある
という問題点があった。However, in the hollow molded article obtained by the blow molding method, since the thickness of the parison is not uniform, air pressure is not uniformly applied to the entire parison, and the degree of adhesion to the mold is low. In contrast, there are portions that cannot sufficiently follow the shape of the mold. For this reason, the appearance is poor, and there is a problem that it is not preferable as a product that emphasizes the appearance such as a side molding. In addition, since the hollow molded product obtained by the gas injection injection molding method forms the hollow part directly by air, the thickness is not uniform, and the thick part may have sink marks and the appearance may be poor. There was a problem that there is.
【０００４】本発明は上記問題点を解消するためになさ
れたものであって、その目的は、外観の優れた中空成形
品を容易に成形できる中空成形品の製造方法を提供する
ことにある。The present invention has been made to solve the above problems, and an object of the present invention is to provide a method of manufacturing a hollow molded article which can easily form a hollow molded article having an excellent appearance.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
に、本発明では金型のキャビティ内に外層を形成する樹
脂を射出し、次いで内層を形成する水又は有機溶剤に可
溶な樹脂を射出して二層成形品を成形した後、前記内層
を形成する樹脂を水又は有機溶剤で溶解する中空成形品
の製造方法をその要旨としている。In order to achieve the above object, in the present invention, a resin for forming an outer layer is injected into a mold cavity, and then a resin soluble in water or an organic solvent for forming the inner layer is injected. The gist of the present invention is a method of manufacturing a hollow molded article in which a resin for forming the inner layer is dissolved with water or an organic solvent after injection to form a two-layer molded article.
【０００６】[0006]
【作用】上記構成により、まず成形品形状を有するキャ
ビティ内に外層を形成する樹脂を射出し、次いで内層を
形成する水又は有機溶剤に可溶な樹脂を射出して二層成
形品を成形する。次いで、この二層成形品の内層を形成
する樹脂を水又は有機溶剤で溶解することにより、内層
部が中空となった中空成形品が製造される。According to the above construction, a resin for forming an outer layer is first injected into a cavity having a shape of a molded article, and then a resin soluble in water or an organic solvent for forming an inner layer is injected to form a two-layer molded article. . Next, a resin for forming the inner layer of the two-layer molded product is dissolved with water or an organic solvent to produce a hollow molded product having a hollow inner layer portion.
【０００７】[0007]
【実施例】以下に本発明を中空のサイドモールの製造方
法に具体化した実施例について図１〜６に従って説明す
る。図１に示すように、本実施例で製造する中空成形品
としてのサイドモール１はほぼ蒲鉾状の形状を有し、そ
の内部には中空部２が長さ方向に延びるように透設され
ている。同サイドモール１の裏面（同図上面）には、サ
イドモール１を図示しない車両ボディに取付けるための
円筒状の一対のボス部３ａ，３ｂが立設されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is embodied in a method for manufacturing a hollow side molding will be described below with reference to FIGS. As shown in FIG. 1, a side molding 1 as a hollow molded product manufactured in the present embodiment has a substantially semi-cylindrical shape, and a hollow portion 2 is provided therein so as to extend in the length direction. I have. A pair of cylindrical boss portions 3a and 3b for mounting the side molding 1 to a vehicle body (not shown) are provided upright on the back surface (the upper surface in the figure) of the side molding 1.
【０００８】次に、サンドイッチ成形法によって二層成
形品を成形するための金型について説明する。図２に示
すように、図中上側の固定型４と下側の可動型５とでサ
イドモール１に対応する形状のキャビティ６が形成され
ている。同キャビティ６の両側における可動型５には前
記ボス部３ａ，３ｂを形成するための一対の円孔７ａ，
７ｂが凹設されている。一方の円孔７ａの底部にはガス
供給孔８が開口され、他方の円孔７ｂにはガス排出孔９
が開口されている。前記キャビティ６の左端部には樹脂
を射出するためのゲート１０が開口されている。なお、
キャビティ６の右端部には、樹脂の一部を排出するため
の図示しない捨てタブが設けられている。Next, a mold for molding a two-layer molded product by the sandwich molding method will be described. As shown in FIG. 2, a cavity 6 having a shape corresponding to the side molding 1 is formed by the fixed mold 4 on the upper side and the movable mold 5 on the lower side in the figure. The movable mold 5 on both sides of the cavity 6 has a pair of circular holes 7a for forming the bosses 3a, 3b.
7b is recessed. A gas supply hole 8 is opened at the bottom of one circular hole 7a, and a gas discharge hole 9 is formed at the other circular hole 7b.
Is open. A gate 10 for injecting resin is opened at the left end of the cavity 6. In addition,
At the right end of the cavity 6, a discard tab (not shown) for discharging a part of the resin is provided.
【０００９】次に、このように構成された金型を用いた
サイドモール１の製造方法について説明する。まず、図
６に示すように、内層１２の外周部に外層１１が被覆さ
れるとともに、内層１２内に空洞部１３を有する二層成
形品をサンドイッチ成形法によって成形する場合につい
て説明する。図３に示すように、まず外層１１を形成す
る溶融した樹脂をゲート１０からキャビティ６内へ射出
する。この樹脂としては、スチレン−エチレン−ブタジ
エン−スチレン共重合樹脂（ＳＥＢＳ樹脂）、ポリプロ
ピレン等を用いることができる。この樹脂を一定量射出
した後、内層１２を形成する樹脂を同じくゲート１０か
らキャビティ６内へ射出する。Next, a method of manufacturing the side molding 1 using the thus-configured mold will be described. First, as shown in FIG. 6, a case will be described in which a two-layer molded product in which the outer layer 11 covers the outer peripheral portion of the inner layer 12 and has the hollow portion 13 in the inner layer 12 is formed by a sandwich molding method. As shown in FIG. 3, first, a molten resin for forming the outer layer 11 is injected from the gate 10 into the cavity 6. As this resin, a styrene-ethylene-butadiene-styrene copolymer resin (SEBS resin), polypropylene, or the like can be used. After injecting a certain amount of this resin, the resin forming the inner layer 12 is also injected from the gate 10 into the cavity 6.
【００１０】この内層１２を形成する樹脂としては、水
又は有機溶剤に溶解する樹脂を用いることができる。水
に溶解する樹脂としては、例えばポリビニルアルコール
（ポバール）等をあげることができる。有機溶剤に溶解
する樹脂としては、例えばアルコールに溶解する樹脂と
してポリビニルブチラール、アセトンに溶解する樹脂と
してポリスチレン等をあげることができる。As the resin forming the inner layer 12, a resin soluble in water or an organic solvent can be used. Examples of the resin soluble in water include polyvinyl alcohol (Poval) and the like. Examples of the resin soluble in an organic solvent include polyvinyl butyral as a resin soluble in alcohol, and polystyrene as a resin soluble in acetone.
【００１１】図４に示すように、内層１２を形成する樹
脂が左側の円孔７ａを通過したとき、ガス供給孔８から
エアＡを供給し、このエアＡを内層１２を形成する樹脂
内に送り、この樹脂の流動に合わせて樹脂内に連続した
空洞部１３を形成する。図５に示すように、さらに内層
１２を形成する樹脂の射出を続けると、上記空洞部１３
はこの内層１２内に形成されてゆく。溶融樹脂がキャビ
ティ６の右端部に至ると、樹脂内のエアＡは右側の円孔
７ｂへ流れ、ガス排出孔９から排出される。なお、キャ
ビティ６の右端部に至った樹脂の一部は図示しない捨て
タブへと流れ、成形品端部の内層１２の形状が調整され
る。As shown in FIG. 4, when the resin forming the inner layer 12 passes through the left circular hole 7a, air A is supplied from the gas supply hole 8, and the air A is introduced into the resin forming the inner layer 12. Then, a continuous cavity 13 is formed in the resin in accordance with the flow of the resin. As shown in FIG. 5, when the injection of the resin for forming the inner layer 12 is further continued,
Are formed in the inner layer 12. When the molten resin reaches the right end of the cavity 6, the air A in the resin flows to the right circular hole 7 b and is discharged from the gas discharge hole 9. A part of the resin reaching the right end of the cavity 6 flows to a discard tab (not shown), and the shape of the inner layer 12 at the end of the molded product is adjusted.
【００１２】次いで、可動型５を固定型４から離間させ
て型開きすることにより、図６，７に示すように、外層
１１と内層１２とからなり、内層１２内に前記両ボス部
３ａ，３ｂ間を連通する空洞部１３を有する二層成形品
が成形される。次に、このようにして得られた二層成形
品の両端部を封鎖した状態で、その空洞部１３に、図７
に示すように、一方のボス部３ａから内層１２を形成す
る樹脂が水溶性樹脂の場合には水Ｓを、有機溶剤溶解性
の樹脂の場合には有機溶剤Ｓを圧入する。すると、内層
１２の樹脂は水又は有機溶剤Ｓに溶解して他方のボス部
３ｂから徐々に流出してゆく。この操作を行うことによ
って、内層１２の樹脂は空洞部１３に近い部分から順に
溶解してゆく。そして、図１に示すように、内部に中空
部２を有するサイドモール１が製造される。Next, the movable mold 5 is separated from the fixed mold 4 and opened, thereby forming an outer layer 11 and an inner layer 12, as shown in FIGS. A two-layer molded article having a cavity 13 communicating between the parts 3b is molded. Next, in a state where both end portions of the thus obtained two-layer molded product are closed, the hollow portion 13 is inserted into the hollow portion 13 as shown in FIG.
As shown in (1), when the resin forming the inner layer 12 from the one boss portion 3a is a water-soluble resin, water S is injected, and when the resin forming the inner layer 12 is an organic solvent-soluble resin, the organic solvent S is injected. Then, the resin of the inner layer 12 is dissolved in water or the organic solvent S and gradually flows out from the other boss 3b. By performing this operation, the resin of the inner layer 12 dissolves in order from the portion near the cavity 13. Then, as shown in FIG. 1, a side molding 1 having a hollow portion 2 inside is manufactured.
【００１３】上記のように、本実施例のサイドモール１
の製造方法によれば、内層１２を形成する樹脂として、
水又は有機溶剤Ｓに溶解する樹脂を適宜選択して使用
し、サンドイッチ成形法によって二層成形品を成形する
ことにより、中空のサイドモール１を容易に成形するこ
とができる。また、サイドモール１の外観は、予め二層
成形品を成形するため、通常の射出成形法による中空部
を有しない成形品とほぼ同様に優れたものとなる。従っ
て、このサイドモール１は外観が重視されるサイドモー
ルとして好適である。さらに、外層１１及び内層１２を
形成する樹脂の供給量を調整することにより、外層１１
又は中空部２の厚さを容易に調整することができる。そ
の結果、肉厚の異なるサイドモール１が得られる。As described above, the side molding 1 of this embodiment
According to the manufacturing method of the above, as the resin forming the inner layer 12,
The hollow side molding 1 can be easily formed by appropriately selecting and using a resin soluble in water or the organic solvent S and forming a two-layer molded product by a sandwich molding method. In addition, since the appearance of the side molding 1 is preliminarily formed into a two-layer molded product, it is almost as excellent as a molded product having no hollow portion by a normal injection molding method. Therefore, this side molding 1 is suitable as a side molding in which the appearance is important. Further, by adjusting the supply amount of the resin forming the outer layer 11 and the inner layer 12,
Alternatively, the thickness of the hollow portion 2 can be easily adjusted. As a result, side moldings 1 having different wall thicknesses are obtained.
【００１４】本発明は上記実施例に限定されるものでは
なく、次のような態様に具体化してもよい。 （１）前記実施例において、ガス供給孔８及びガス排出
孔９を複数設けることにより、空洞部１３を複数形成
し、この空洞部１３に水又は有機溶剤Ｓを通してもよ
い。また、空洞部１３を設けることなく、サイドモール
１の両端部から内層１２を溶解してもよい。 （２）本発明は、例えば中空のバンパモール、オーナメ
ント等の製造方法に具体化してもよい。The present invention is not limited to the above embodiment, but may be embodied in the following embodiments. (1) In the above-described embodiment, a plurality of cavities 13 may be formed by providing a plurality of gas supply holes 8 and a plurality of gas discharge holes 9, and water or the organic solvent S may be passed through the cavities 13. Further, the inner layer 12 may be dissolved from both ends of the side molding 1 without providing the cavity 13. (2) The present invention may be embodied in, for example, a method for manufacturing a hollow bumper molding, an ornament, or the like.
【００１５】[0015]
【発明の効果】本発明の中空成形品の製造方法によれ
ば、外観の優れた中空成形品が容易に製造できるという
効果を奏する。According to the method for producing a hollow molded article of the present invention, there is an effect that a hollow molded article having an excellent appearance can be easily produced.
【図１】本発明の実施例を示すサイドモールの斜視図で
ある。FIG. 1 is a perspective view of a side molding showing an embodiment of the present invention.
【図２】サンドイッチ成形法による金型を示す断面図で
ある。FIG. 2 is a cross-sectional view showing a mold by a sandwich molding method.
【図３】キャビティ内に外層を形成する樹脂を射出した
状態を示す金型の断面図である。FIG. 3 is a sectional view of a mold showing a state in which a resin for forming an outer layer is injected into a cavity.
【図４】キャビティ内に内層を形成する樹脂を射出する
とともに、エアを供給した状態を示す金型の断面図であ
る。FIG. 4 is a sectional view of a mold showing a state in which a resin for forming an inner layer is injected into a cavity and air is supplied.
【図５】内層内にエアによる空洞部が形成された状態を
示す金型の断面図である。FIG. 5 is a sectional view of a mold showing a state in which a cavity is formed by air in an inner layer.
【図６】内層内にエアによる空洞部が形成された状態を
示すサイドモールの断面図である。FIG. 6 is a cross-sectional view of a side molding showing a state in which a cavity is formed by air in an inner layer.
【図７】内層内の空洞部に水又は有機溶剤を圧入する状
態を示す斜視図である。FIG. 7 is a perspective view showing a state in which water or an organic solvent is press-fitted into a cavity in an inner layer.
１…中空成形品としてのサイドモール、４…金型として
の固定型、５…金型としての可動型、６…キャビティ、
１１…外層、１２…内層、Ｓ…水又は有機溶剤。1 ... side molding as a hollow molded product, 4 ... fixed mold as a mold, 5 ... movable mold as a mold, 6 ... cavity,
11: outer layer, 12: inner layer, S: water or organic solvent.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｂ２９Ｋ 29:00 Ｂ２９Ｌ 22:00 31:30 (56)参考文献 特開 平４−25412（ＪＰ，Ａ) 特開 平２−225030（ＪＰ，Ａ) 特開 昭50−135175（ＪＰ，Ａ) 特開 平３−284915（ＪＰ，Ａ) 特開 平２−108511（ＪＰ，Ａ) 特開 平１−269511（ＪＰ，Ａ) 特開 平１−206012（ＪＰ，Ａ) 特開 昭63−92419（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) B29C 45/00 B29C 33/52 B29C 45/16 B60R 13/04 ──────────────────────────────────────────────────続 き Continuation of front page (51) Int.Cl. 6 Identification symbol FI B29K 29:00 B29L 22:00 31:30 (56) References JP-A-4-25412 (JP, A) JP-A-2- 225030 (JP, A) JP-A-50-135175 (JP, A) JP-A-3-284915 (JP, A) JP-A-2-108511 (JP, A) JP-A-1-269511 (JP, A) JP-A-1-206012 (JP, A) JP-A-63-92419 (JP, A) (58) Fields investigated (Int. Cl. 6 , DB name) B29C 45/00 B29C 33/52 B29C 45/16 B60R 13/04
Claims (1)
外層（１１）を形成する樹脂を射出し、次いで内層（１
２）を形成する水又は有機溶剤に可溶な樹脂を射出して
二層成形品を成形した後、前記内層（１２）を形成する
樹脂を水又は有機溶剤（Ｓ）で溶解することを特徴とす
る中空成形品の製造方法。1. A resin for forming an outer layer (11) is injected into a cavity (6) of a mold (4, 5).
After forming a two-layer molded article by injecting a resin soluble in water or an organic solvent forming 2), the resin forming the inner layer (12) is dissolved in water or an organic solvent (S). A method for producing a hollow molded article.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1114291A JP2946773B2 (en) | 1991-01-31 | 1991-01-31 | Manufacturing method of hollow molded products |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1114291A JP2946773B2 (en) | 1991-01-31 | 1991-01-31 | Manufacturing method of hollow molded products |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04246517A JPH04246517A (en) | 1992-09-02 |
| JP2946773B2 true JP2946773B2 (en) | 1999-09-06 |
Family
ID=11769773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1114291A Expired - Fee Related JP2946773B2 (en) | 1991-01-31 | 1991-01-31 | Manufacturing method of hollow molded products |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2946773B2 (en) |
-
1991
- 1991-01-31 JP JP1114291A patent/JP2946773B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04246517A (en) | 1992-09-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2006675C (en) | Process and mold for producing a multilayer molded article | |
| WO2000078527A1 (en) | Blow molding method, blow molded product and blow molding mold | |
| CA2154435A1 (en) | Method for producing thermoplastic resin molded article and mold assembly therefor | |
| JP2946773B2 (en) | Manufacturing method of hollow molded products | |
| EP0917943B1 (en) | Method of manufacturing plastic moldings and core used in same | |
| JP2019195989A (en) | Method of manufacturing model car body and model car body made of plastic | |
| JP3516513B2 (en) | Manufacturing method of hollow resin molded product | |
| JP2001138385A (en) | Method for manufacturing composite foamed resin molding with skin | |
| JPH0471692B2 (en) | ||
| JP2982599B2 (en) | Method for producing molded article having hollow part | |
| JP3858408B2 (en) | Multi-layer molding mold | |
| JP3049128B2 (en) | Injection molding method and apparatus | |
| JPH1177711A (en) | Method for producing laminate | |
| JP2631408B2 (en) | Manufacturing method of hollow molded products | |
| JP2679025B2 (en) | Method for manufacturing resin molded products | |
| JPH01290412A (en) | Blow molding process of hollow formed item integrally molded with insert part | |
| JP2761061B2 (en) | Method of manufacturing a plastic bumper having a bent portion | |
| JP3052811B2 (en) | Mall and its blow molding method | |
| JPS5872425A (en) | Blowing molding die | |
| JPH07156196A (en) | Production of insert sheet and insert moldings | |
| JPH03284915A (en) | Manufacture of hollow resin molded item | |
| JPH04252751A (en) | Exterior moulding for vehicle | |
| JPH01206012A (en) | Manufacture of thin-wall resin product | |
| JPH07299838A (en) | Rod-shaped hollow molded product and production thereof | |
| JP2003159723A5 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |