JPH11129322A - Hollow double-wall structure - Google Patents
Hollow double-wall structureInfo
- Publication number
- JPH11129322A JPH11129322A JP31620397A JP31620397A JPH11129322A JP H11129322 A JPH11129322 A JP H11129322A JP 31620397 A JP31620397 A JP 31620397A JP 31620397 A JP31620397 A JP 31620397A JP H11129322 A JPH11129322 A JP H11129322A
- Authority
- JP
- Japan
- Prior art keywords
- wall
- pipe
- hollow double
- hollow
- back wall
- 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.)
- Pending
Links
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、熱可塑性プラスチ
ックをブロー成形することにより得られる中空二重壁構
造体に関する。The present invention relates to a hollow double-walled structure obtained by blow molding a thermoplastic.
【０００２】[0002]
【従来の技術】従来から、建築物の内装壁、パーティシ
ョン、扉、あるいは自動車のヘッドレストやアームレス
トなどを構成するプラスチック製の中空二重壁構造体に
おいて、中空部内に形成するインナーリブに平板状でか
つ曲面状の棒状体をインサートすることにより、強度お
よび剛性を向上させる技術は、特開平９−１５５９５７
号公報に記載されている。2. Description of the Related Art Conventionally, in a plastic hollow double-wall structure constituting an interior wall, a partition, a door of a building, or a headrest or an armrest of an automobile, an inner rib formed in a hollow portion has a flat shape. A technique of improving strength and rigidity by inserting a curved rod is disclosed in Japanese Patent Application Laid-Open No. 9-155957.
No., published in Japanese Patent Application Publication No.
【０００３】[0003]
【発明が解決しようとする課題】前掲の特開平９−１５
５９５７号公報に記載されている技術は、本出願人が開
発したものであるが、その後の検討の結果、主にブロー
成形上、次のような問題点のあることが分かった。SUMMARY OF THE INVENTION The above-mentioned Japanese Patent Application Laid-Open No. 9-15 / 1997
The technology described in Japanese Patent No. 5957 was developed by the present applicant, but as a result of subsequent studies, it has been found that the following problems mainly exist in blow molding.
【０００４】すなわち、特開平９−１５５９５７号公報
に記載されている技術においては、ブロー成形される中
空二重壁構造体にインサートされる棒状体が平板状でか
つ曲面状のものであるところから、ブロー成形後に中空
二重壁構造体が冷却する過程で生じる冷却収縮が、イン
サートされている棒状体によって部分的に妨げられる現
象を呈し、この現象による収縮差が変形歪みの原因とな
ることである。[0004] That is, in the technique described in Japanese Patent Application Laid-Open No. 9-155957, the rod inserted into the hollow double-walled structure to be blow-molded is flat and curved. The cooling shrinkage that occurs during the process of cooling the hollow double-walled structure after blow molding exhibits a phenomenon that is partially hindered by the inserted rod-shaped body, and the difference in shrinkage due to this phenomenon causes deformation distortion. is there.
【０００５】そこで、本発明は、上述のような課題を解
決しようとするものであって、中空部内には真っ直ぐな
パイプを配設することと、パイプが包囲される包囲壁と
一体を成す裏壁のパイプの端部に対応する部位に、パイ
プの端面に対する遊び間隔を保持する凹部を設けたこと
により、軽量で剛性を有する中空二重壁構造体が得られ
るとともに、ブロー成形後において中空二重壁構造体が
冷却収縮する過程で、パイプに接している部位の収縮に
ともなうパイプの表面に対する滑り性が良くて、しかも
パイプの長さが相対的に増大する分を裏壁の凹部におい
て逃がすことができ、パイプをインサートすることによ
り強度および剛性の向上を図ったものであっても成形後
の冷却収縮による変形歪みを生じない中空二重壁構造体
を得ることを目的とするものである。In view of the above, the present invention has been made to solve the above-described problems, and has a problem that a straight pipe is provided in a hollow portion and a back wall which is integral with an surrounding wall surrounding the pipe. By providing a recess at the portion of the wall corresponding to the end of the pipe to maintain a play interval with respect to the end face of the pipe, a lightweight and rigid hollow double-walled structure can be obtained, and the hollow double-walled structure can be obtained after blow molding. In the process of cooling and shrinking of the heavy wall structure, the sliding property against the surface of the pipe due to the shrinkage of the part in contact with the pipe is good, and at the same time, the length of the pipe is relatively increased and escapes in the recess in the back wall. The purpose of the present invention is to obtain a hollow double-walled structure that does not cause deformation distortion due to cooling shrinkage after molding even if strength and rigidity are improved by inserting a pipe. It is intended to.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するた
め、本発明に係る中空二重壁構造体は次のように構成し
た。すなわち、その構成は、表壁と、表壁に間隔をおい
て対向する裏壁と、表壁および裏壁との間に中空部を形
成する周囲壁とで構成される中空二重壁構造体であっ
て、中空部内には真っ直ぐなパイプが配設されるととも
にパイプの周囲は少なくとも裏壁と一体に連なる包囲壁
で包囲されており、裏壁のパイプの端部に対応する部位
にはパイプの端面に対する遊び間隔を保持する凹部を形
成して成ることを特徴とするものである。In order to achieve the above object, a hollow double-walled structure according to the present invention is constituted as follows. That is, the structure is a hollow double-walled structure including a front wall, a back wall facing the front wall at an interval, and a peripheral wall forming a hollow portion between the front wall and the back wall. A straight pipe is disposed in the hollow portion, and the periphery of the pipe is surrounded by at least a surrounding wall integrally connected to the back wall, and a pipe corresponding to an end of the pipe on the back wall is provided with a pipe. Characterized in that a concave portion for maintaining a play interval with respect to the end face is formed.
【０００７】本発明の上記構成においては、パイプの表
面に、メッキなど滑り性を良くする表面処理を施すこと
が好適である。In the above structure of the present invention, it is preferable that the surface of the pipe is subjected to a surface treatment such as plating to improve the slipperiness.
【０００８】なお、本発明において、真っ直ぐなパイプ
とは、必ずしも厳密な意味での真直性を有するもののこ
とではなく、パイプの表面に対する樹脂の滑り性を妨げ
ることのない直線性を有すればよい。In the present invention, a straight pipe does not necessarily have a straightness in a strict sense, but may have a straightness that does not hinder the slipperiness of the resin with respect to the surface of the pipe. .
【０００９】[0009]
【発明の実施の形態】図１および図２は本発明の一実施
の形態に係る中空二重壁構造体であって、図１は裏面側
から見た斜視図、図２は図１のＡ−Ａ線拡大断面図であ
る。1 and 2 show a hollow double-wall structure according to an embodiment of the present invention. FIG. 1 is a perspective view seen from the back side, and FIG. FIG. 4 is an enlarged cross-sectional view taken along a line A.
【００１０】また、図３は本発明の他の実施の形態に係
る図２に対応する部分の拡大断面図である。FIG. 3 is an enlarged sectional view of a portion corresponding to FIG. 2 according to another embodiment of the present invention.
【００１１】図４および図５は本発明の一実施の形態に
係る中空二重壁構造体のブロー成形態様を示し、図４は
保持部材を進出させて加圧流体の吹き込み直後の状態を
示す断面図、図５は保持部材を後退させた状態を示す断
面図である。FIG. 4 and FIG. 5 show a blow molding mode of the hollow double-walled structure according to one embodiment of the present invention, and FIG. 4 shows a state immediately after the pressurized fluid is blown by the advance of the holding member. FIG. 5 is a sectional view showing a state in which the holding member is retracted.
【００１２】図１において、１は中空二重壁構造体であ
る。この中空二重壁構造体１はパネル状を成しており、
２は表壁、３は裏壁、４は周囲壁であって、図２に示す
ように、表壁２に対して裏壁３は間隔をおいて対向して
おり、周囲壁４によって表壁２および裏壁３との間に中
空部５が形成されている。In FIG. 1, reference numeral 1 denotes a hollow double-walled structure. The hollow double-walled structure 1 has a panel shape,
Reference numeral 2 denotes a front wall, 3 denotes a back wall, and 4 denotes a peripheral wall. As shown in FIG. 2, the back wall 3 faces the front wall 2 at an interval. A hollow portion 5 is formed between 2 and the back wall 3.
【００１３】上記中空二重壁構造体１の中空部５内に
は、真っ直ぐなパイプ６が配設されるとともに、このパ
イプ６の周囲は裏壁３と一体に連なる包囲壁７で全周囲
が包囲されており、表壁２の内面に対応する包囲壁７の
部分は表壁２に溶着されている。８はその溶着部であ
る。また、包囲壁７の裏壁３に連なる部分９は、裏壁３
から延びて包囲壁７に連なる対向壁が互いに溶着された
厚肉部を成している。１０はその溶着部である。A straight pipe 6 is provided in the hollow portion 5 of the hollow double-walled structure 1, and the circumference of the pipe 6 is entirely surrounded by a surrounding wall 7 integrally connected to the back wall 3. A portion of the surrounding wall 7 that is surrounded and corresponds to the inner surface of the front wall 2 is welded to the front wall 2. Reference numeral 8 denotes the welded portion. The portion 9 of the surrounding wall 7 connected to the back wall 3 is the back wall 3.
Opposing walls extending from the outer wall and forming a thick wall are welded to each other. Reference numeral 10 denotes the welded portion.
【００１４】図１に示すように、裏壁３のパイプ６の端
部に対応する部位には、パイプ６の端面に対する遊び間
隔を保持する凹部１１，１１が形成されている。As shown in FIG. 1, recesses 11 and 11 for maintaining a play interval with respect to the end face of the pipe 6 are formed in a portion of the back wall 3 corresponding to the end of the pipe 6.
【００１５】図３には、本発明の他の実施の形態が示さ
れている。この実施の形態においては、パイプ６の包囲
壁７が裏壁３と一体に連なっているが、包囲壁７は表壁
２に溶着されていない構成を有している。その他の構成
は本発明の一実施の態様と同構成であるから、同構成の
部位には同符号を付して説明を省略する。FIG. 3 shows another embodiment of the present invention. In this embodiment, the surrounding wall 7 of the pipe 6 is integrally connected to the back wall 3, but the surrounding wall 7 is not welded to the front wall 2. Since other configurations are the same as those of the embodiment of the present invention, the same components are denoted by the same reference numerals and description thereof will be omitted.
【００１６】図示の実施の形態では、パイプ６として円
筒状のものを用いたが、パイプ６はこれに限られるもの
ではなく、例えば、三角筒状や楕円筒状のものであって
もよい。そして、三角筒状のパイプの場合は、１つの頂
稜を裏壁３側に向け、かつ２つの稜間の平面部を表壁２
側に対向させるとよい。また、楕円筒状のパイプの場合
は短辺側を裏壁３と表壁２方向に向けるのがよい。In the illustrated embodiment, a cylindrical pipe is used as the pipe 6, but the pipe 6 is not limited to this, and may be, for example, a triangular or elliptical cylinder. In the case of a triangular cylindrical pipe, one top ridge faces the back wall 3 and a plane portion between the two ridges faces the front wall 2.
It is good to face to the side. In the case of an elliptical cylindrical pipe, the short side is preferably directed toward the back wall 3 and the front wall 2.
【００１７】本発明に係る中空二重壁構造体１は、ＡＢ
Ｓ樹脂、変性ポリフェニレンオキサイド樹脂、ポリカー
ボネート樹脂、ポリアミド樹脂、ポリプロピレン樹脂、
ポリエチレン樹脂等、ブロー成形可能な熱可塑性樹脂で
構成される。また、パイプ６は金属製であり、必要に応
じて表面の滑り性を良くするため、メッキなどの表面処
理を施すものとする。The hollow double-walled structure 1 according to the present invention comprises AB
S resin, modified polyphenylene oxide resin, polycarbonate resin, polyamide resin, polypropylene resin,
It is made of a blowable thermoplastic resin such as a polyethylene resin. The pipe 6 is made of metal, and is subjected to a surface treatment such as plating, if necessary, in order to improve the slipperiness of the surface.
【００１８】本発明に係る中空二重壁構造体１は、図４
および図５に示すようにブロー成形される。一方の分割
金型１２と他方の分割金型１３の間に、他方の分割金型
１３に設けた一対の保持部材１４間にパイプ６の両端を
挟んで配置するとともにパリソン１５を配置し、図４に
示すように型閉め後、パリソン１５内に圧力流体を吹き
込んでブロー成形する。次いで、図５に示すように、保
持部材１４を後退させる。そして、ブロー成形後は、分
割金型１２，１３の冷却により中空二重壁構造体１を構
成する表壁２、裏壁３および周囲壁４の表面を冷却し、
形状が保持される程度に冷却固化するのをまって中空二
重壁構造体１を分割金型１２，１３から取り出す。図４
および図５において、１６は冷却水通路、１７はバリを
示している。The hollow double-wall structure 1 according to the present invention is shown in FIG.
And blow molding as shown in FIG. Between one split mold 12 and the other split mold 13, both ends of the pipe 6 are arranged between a pair of holding members 14 provided on the other split mold 13, and a parison 15 is arranged. After closing the mold as shown in FIG. 4, pressurized fluid is blown into the parison 15 to perform blow molding. Next, as shown in FIG. 5, the holding member 14 is retracted. After the blow molding, the surfaces of the front wall 2, the back wall 3, and the peripheral wall 4 constituting the hollow double-wall structure 1 are cooled by cooling the split molds 12, 13, and
The hollow double-walled structure 1 is taken out of the split molds 12 and 13 by cooling and solidifying to the extent that the shape is maintained. FIG.
5 and 16, reference numeral 16 denotes a cooling water passage, and reference numeral 17 denotes burrs.
【００１９】上記のように、ブロー成形された中空二重
壁構造体１においては、その裏壁３に一対の保持部材１
４により図１に示すように凹部１１，１１が形成され
る。この凹部１１，１１は、前述のようにパイプ６の端
面に対する遊び間隔を保持するものである。As described above, in the hollow double-wall structure 1 formed by blow molding, the pair of holding members 1
4 form recesses 11, 11 as shown in FIG. The recesses 11 and 11 maintain a play interval with respect to the end face of the pipe 6 as described above.
【００２０】本発明に係る中空二重壁構造体１において
は、中空部５内に真っ直ぐなパイプ６が配設されるとと
もに、パイプ６の周囲は少なくとも裏壁３と一体に連な
る包囲壁７で包囲されているが、裏壁３のパイプ６の端
部に対応する部位にはパイプ６の端面に対する遊び間隔
を保持する凹部１１，１１を設けているので、ブロー成
形後において中空二重壁構造体１を構成する樹脂が冷却
収縮しても、パイプ６の表面の包囲壁７に対する滑り性
が良くて、包囲壁７の部位に収縮に伴う変形歪みが生じ
ないうえ、中空二重壁構造体１を構成する樹脂に収縮に
よりパイプ６が相対的に伸長しても、その分が凹部１
１，１１の遊び間隔内に突出することで他に影響を及ぼ
すことなく吸収されるので、中空二重壁構造体１がパイ
プ６をインサートすることにより強度および剛性の向上
を図ったものであっても、成形後の冷却収縮による変形
歪みが生じない。In the hollow double-walled structure 1 according to the present invention, a straight pipe 6 is disposed in the hollow portion 5, and the periphery of the pipe 6 is defined by at least the surrounding wall 7 integrally connected to the back wall 3. Although it is surrounded, recesses 11 and 11 are provided in a portion of the back wall 3 corresponding to the end of the pipe 6 so as to maintain a play interval with respect to the end face of the pipe 6, so that the hollow double-wall structure is formed after blow molding. Even if the resin constituting the body 1 is cooled and shrunk, the surface of the pipe 6 has a good sliding property with respect to the surrounding wall 7, so that the portion of the surrounding wall 7 is not deformed due to the shrinkage and the hollow double-walled structure Even if the pipe 6 relatively expands due to contraction of the resin constituting
The hollow double-walled structure 1 has the strength and rigidity improved by inserting the pipe 6 because it is absorbed without affecting the other by protruding within the play interval of 1, 11. However, deformation distortion due to cooling shrinkage after molding does not occur.
【００２１】[0021]
【発明の効果】本発明によれば、中空部内には真っ直ぐ
なパイプを配設することと、パイプが包囲される包囲壁
と一体を成す裏壁のパイプの端部に対応する部位に、パ
イプの端面に対する遊び間隔を保持する凹部を設けたこ
とにより、軽量で剛性を有する中空二重壁構造体が得ら
れるとともに、ブロー成形後において中空二重壁構造体
が冷却収縮する過程で、パイプに接している部位の収縮
にともなうパイプの表面に対する滑りが良くて、しかも
パイプの長さが相対的に増大する分を裏壁の凹部におい
て逃がすことができ、パイプをインサートすることによ
り強度および剛性の向上を図ったものであっても成形後
の冷却収縮による変形歪みを生じない中空二重壁構造体
を得ることできる。According to the present invention, a straight pipe is provided in a hollow portion, and a pipe is formed at a portion corresponding to an end of the pipe on a back wall which is integral with an surrounding wall surrounding the pipe. By providing the concave portion that keeps the play interval with respect to the end face of the pipe, a lightweight and rigid hollow double-walled structure can be obtained, and in the process of cooling and shrinking of the hollow double-walled structure after blow molding, pipes are formed. Sliding against the surface of the pipe due to the contraction of the contacting part is good, and the relatively increased length of the pipe can escape in the concave part of the back wall. Even when the structure is improved, a hollow double-walled structure that does not generate deformation distortion due to cooling shrinkage after molding can be obtained.
【図１】本発明に係る中空二重壁構造体を裏面側から見
た斜視図である。FIG. 1 is a perspective view of a hollow double-walled structure according to the present invention as viewed from the back side.
【図２】図１のＡ−Ａ線拡大断面図である。FIG. 2 is an enlarged sectional view taken along line AA of FIG.
【図３】本発明の他の実施の形態に係る図２に対応する
部分の拡大断面図である。FIG. 3 is an enlarged sectional view of a portion corresponding to FIG. 2 according to another embodiment of the present invention.
【図４】本発明の一実施の形態に係る中空二重壁構造体
のブロー成形態様を示し、図４は保持部材を進出させて
加圧流体の吹き込み直後の状態を示す断面図である。FIG. 4 is a cross-sectional view showing a state of blow molding a hollow double-walled structure according to an embodiment of the present invention, and FIG. 4 shows a state immediately after blowing a pressurized fluid with a holding member advanced.
【図５】保持部材を後退させた状態を示す断面図であ
る。FIG. 5 is a cross-sectional view showing a state in which a holding member is retracted.
１ 中空二重壁構造体 ２ 表壁 ３ 裏壁 ４ 周囲壁 ５ 中空部 ６ パイプ ７ 包囲壁 ８ 溶着部 ９ 包囲壁７の裏壁３に連なる部分 １０ 溶着部 １１，１１ 凹部 １２ 一方の分割金型 １３ 他方の分割金型 １４ 一対の保持部材 １５ パリソン １６ 冷却水通路 １７ バリ DESCRIPTION OF SYMBOLS 1 Hollow double wall structure 2 Front wall 3 Back wall 4 Peripheral wall 5 Hollow part 6 Pipe 7 Surrounding wall 8 Welding part 9 Portion connected to back wall 3 of surrounding wall 7 Welding part 11, 11 Concave part 12 One split metal Mold 13 The other split mold 14 A pair of holding members 15 Parison 16 Cooling water passage 17 Burr
Claims (2)
壁と、表壁および裏壁との間に中空部を形成する周囲壁
とで構成される中空二重壁構造体であって、中空部内に
は真っ直ぐなパイプが配設されるとともにパイプの周囲
は少なくとも裏壁と一体に連なる包囲壁で包囲されてお
り、裏壁のパイプの端部に対応する部位にはパイプの端
面に対する遊び間隔を保持する凹部を形成して成ること
を特徴とする中空二重壁構造体。1. A hollow double-walled structure comprising a front wall, a back wall facing the front wall at an interval, and a peripheral wall forming a hollow portion between the front wall and the back wall. A straight pipe is disposed in the hollow part, and the periphery of the pipe is surrounded by an enclosing wall that is at least integrally connected to the back wall, and a portion of the back wall corresponding to the end of the pipe has a pipe. A hollow double-walled structure comprising a concave portion for maintaining a play interval with respect to an end face.
くする表面処理を施すことを特徴とする請求項１記載の
中空二重壁構造体。2. The hollow double-wall structure according to claim 1, wherein the surface of the pipe is subjected to a surface treatment such as plating to improve the slipperiness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31620397A JPH11129322A (en) | 1997-10-31 | 1997-10-31 | Hollow double-wall structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31620397A JPH11129322A (en) | 1997-10-31 | 1997-10-31 | Hollow double-wall structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11129322A true JPH11129322A (en) | 1999-05-18 |
Family
ID=18074454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31620397A Pending JPH11129322A (en) | 1997-10-31 | 1997-10-31 | Hollow double-wall structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11129322A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006043703A1 (en) * | 2004-10-19 | 2006-04-27 | Kyoraku Co., Ltd. | Blow molded article with surface skin and method for production thereof |
| JP2018176642A (en) * | 2017-04-19 | 2018-11-15 | キョーラク株式会社 | Structure |
-
1997
- 1997-10-31 JP JP31620397A patent/JPH11129322A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006043703A1 (en) * | 2004-10-19 | 2006-04-27 | Kyoraku Co., Ltd. | Blow molded article with surface skin and method for production thereof |
| JPWO2006043703A1 (en) * | 2004-10-19 | 2008-05-22 | キョーラク株式会社 | Blow molded product with skin and method for producing the same |
| US9399319B2 (en) | 2004-10-19 | 2016-07-26 | Kyoraku Co., Ltd. | Blow molded article with surface skin and method for production thereof |
| JP2018176642A (en) * | 2017-04-19 | 2018-11-15 | キョーラク株式会社 | Structure |
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