JPS58114912A - Manufacture of branch pipe for sewerage - Google Patents
Manufacture of branch pipe for sewerageInfo
- Publication number
- JPS58114912A JPS58114912A JP21562381A JP21562381A JPS58114912A JP S58114912 A JPS58114912 A JP S58114912A JP 21562381 A JP21562381 A JP 21562381A JP 21562381 A JP21562381 A JP 21562381A JP S58114912 A JPS58114912 A JP S58114912A
- Authority
- JP
- Japan
- Prior art keywords
- pipe body
- pipe
- branch pipe
- outer mold
- mold
- 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
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
- B29C57/00—Shaping of tube ends, e.g. flanging, belling or closing; Apparatus therefor, e.g. collapsible mandrels
- B29C57/02—Belling or enlarging, e.g. combined with forming a groove
- B29C57/04—Belling or enlarging, e.g. combined with forming a groove using mechanical means
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sewage (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Abstract
Description
【発明の詳細な説明】
本発明はサドル鍔と、受口を有する管体とが一体となっ
た下水用支管の製法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a sewage branch pipe in which a saddle collar and a pipe body having a socket are integrated.
一般に、下水用本管から分岐管を取出す際には、一端外
周にサドル鍔を有し、他端部r(拡径した受口を有する
下水用支管が用いられている◎ところで、従来の下水用
支管は、(1)受口とサドル鍔を有する支管を一体的に
射出成形する方法、あるいけ、(2)管体に受口をブロ
ー成形したのち、とhを別体に成形し、たサドル鍔を接
着剤を用いて接合する方法がとられていた。Generally, when taking out a branch pipe from a main sewage pipe, a sewage branch pipe is used that has a saddle collar on the outer periphery of one end and a socket with an enlarged diameter on the other end. The branch pipe can be made by (1) integrally injection molding a branch pipe having a socket and a saddle flange, or (2) blow molding a socket on the pipe body, and then molding the and h separately. The method used was to use adhesive to join the saddle collars.
しかしながら、前者(1)の場合には、受口がアンダー
カットとなるため、射出成形金型が高価となり、必然的
に製品のコストアップが避けらhなかった。また後者(
2)の場合には、振動、衝撃等を受けた際に破損し5易
いという欠点があった。However, in the former case (1), since the socket is undercut, the injection mold becomes expensive, and the cost of the product inevitably increases. Also the latter (
In the case of 2), there was a drawback that it was easily damaged when subjected to vibrations, shocks, etc.
即ち、下水用支管は、本管の外周にサドル鍔を介して接
着接合されるが、下水用支管に管軸方向の荷重、曲げモ
ーメント等が作用した際にサドル鍔と受口を有する管体
との接着が剥離し、下水用支管が本管内に落込んで漏水
したり1本管内の流水が妨げらねるという事故の発生す
ることがあった。In other words, the sewage branch pipe is adhesively bonded to the outer periphery of the main pipe via the saddle flange, but when a load in the axial direction of the sewage pipe, a bending moment, etc. is applied to the sewage branch pipe, the pipe body with the saddle flange and the socket Accidents have occurred in which the adhesive between the sewage pipes has peeled off, causing the sewage branch pipes to fall into the main pipes, causing water leaks, or preventing water from flowing through one main pipe.
本発明は、かかる従来支管の欠点を解消【、たものであ
り、安・価に製造でき、かつサドル鍔と受口を有する管
体とが一体となって下水用本管内への落込みを確実に防
止できる下水用支管の製法を提供するものである。The present invention eliminates the drawbacks of the conventional branch pipes, can be manufactured at low cost, and the saddle collar and the pipe body having the socket are integrated to prevent the pipe from falling into the main sewage pipe. The present invention provides a method for manufacturing a sewage branch pipe that can reliably prevent the problem.
V 以下、本発明を図面に詳細に説明する。V Hereinafter, the present invention will be explained in detail with reference to the drawings.
第7図は、射出成形によって得られた中間製品を示す縦
断面図、第2図は、この中間製品を外金型で包囲して拡
径した受口を成形する工程の縦断面図、第3図は、本発
明の製法によって得られた下水用支管の縦断面図である
。FIG. 7 is a longitudinal sectional view showing an intermediate product obtained by injection molding, and FIG. FIG. 3 is a longitudinal sectional view of a sewage branch pipe obtained by the manufacturing method of the present invention.
本発明では、まず第1段階の製造工程で第7図に示すよ
うに、管体/の一端外周にサドル鍔が突出した中間製品
を成形する。この中間製品は、外型と内型とで構成する
キャビティ内に溶融状態の熱可塑性樹脂を射出すること
によって得られる。同、第1図に示す中間製品は、管体
/の管軸に対して若干傾斜させてサドル鍔/、、2を突
出させたものを示し、たが、サドル鍔/2は所望とする
最終製品に応じて管軸と直角方向に突出させてもよい。In the present invention, first, in the first stage manufacturing process, as shown in FIG. 7, an intermediate product having a saddle flange protruding from the outer periphery of one end of the tube is molded. This intermediate product is obtained by injecting a molten thermoplastic resin into a cavity made up of an outer mold and an inner mold. The intermediate product shown in Fig. 1 has the saddle flange /, 2 protruding from the tube at a slight angle with respect to the tube axis of the tube body. Depending on the product, it may be made to protrude in a direction perpendicular to the tube axis.
次いで、この中間製品の他端部、即ち、サドル鍔/−2
が突出していない側の管端部を/−20〜/jθ℃のオ
イル中に一定時間浸漬する等の適宜の加熱手段を用いて
軟什させてから外金型で包囲し7、受口を成形する〇
この第一段階の成形工程では、外金型で包囲し、た管体
/の内側にエアー、水、オイル等の加圧流体を作用させ
て外周方向に膨出させることによって受口を成形するも
のであるが、こhを具体的実施例を示す第2図にて説明
する。Next, the other end of this intermediate product, that is, the saddle tsuba/-2
After softening the end of the pipe on the side from which it does not protrude using an appropriate heating means such as immersing it in oil at /-20 to /jθ℃ for a certain period of time, surround it with an outer mold 7, and seal the socket. Molding〇In this first step of the molding process, the tube is surrounded by an outer mold, and a pressurized fluid such as air, water, oil, etc. is applied to the inside of the tube to cause it to bulge in the outer circumferential direction. This will be explained with reference to FIG. 2, which shows a specific example.
図中、2は半割状に構成さねた外金型であって、核外金
型コの壁内には、成形内壁面と連通した空気抜き穴認/
が設けらhている。3け内金型である。In the figure, reference numeral 2 denotes an outer mold formed in half, and an air vent hole communicating with the molding inner wall surface is found in the wall of the outer mold.
is provided. It is a 3-hole mold.
内金型3は、管体/の端部・、を拡径し、がっ、加圧流
体を導入する穴3//を有する把持部3/と、気密部3
2とから構成さhている。気密部32は、把持部3/の
先端に固定したコア3.22と、連結杆33と接続しま
た押圧部材3−/との間でパッキンググを圧縮して、管
体/内の気密を保持できるように構成されている。The inner mold 3 has a gripping part 3/ having a hole 3// for introducing pressurized fluid by enlarging the diameter of the end part of the pipe body/, and an airtight part 3/.
It is composed of 2. The airtight part 32 compresses the packing between the core 3.22 fixed to the tip of the grip part 3/ and the connecting rod 33 and the pressing member 3-/ to maintain airtightness inside the pipe body. It is configured so that it can be retained.
しかして、管体/の端部を外金型−で包囲したのち、管
体/内に内金型3を挿入し1、把持部3/で拡径してそ
の端部を外金型コとの間で挾持する。次いで、連結杆3
3を作動させて押圧部材3−2/とコア322との間で
パッキンググを圧縮し、管体/内の気密を保持してから
穴3//、を通して管体/内に?〜/jkg/dの加圧
流体を導入する。この加圧流体の作用により、管体/を
外金型−の成形内壁面に密着するまで膨出させて拡径し
た受口を成形したのち、金型を型開きして取り出すと、
第3図に示すように受口//を有する管体/とサドル鍔
/2とが一体となった下水用支管が得られる。After surrounding the end of the tube with the outer mold, the inner mold 3 is inserted into the tube and the diameter is expanded with the gripping part 3, and the end is wrapped around the outer mold. be held between. Next, connecting rod 3
3 to compress the packing between the pressing member 3-2/ and the core 322, maintain airtightness inside the tube, and then pass through the hole 3-2 into the tube. ~/jkg/d of pressurized fluid is introduced. Due to the action of this pressurized fluid, the tube expands until it comes into close contact with the molding inner wall surface of the outer mold, forming a socket with an enlarged diameter. When the mold is opened and taken out,
As shown in FIG. 3, a sewage branch pipe is obtained in which the pipe body / having the socket / and the saddle collar / 2 are integrated.
以上詳述した如く、本発明によって得られた下水用支管
は受口を有する管体とサドル鍔とが一体に成形された構
造を有するので、従来の下水用支管と比較して安価に製
造できるだけでなく、これを用いて下水配管の施工を行
った際には、たとえ振動、衝衝等の作用を受けても、本
管内に落込む虞れは全くなく、分岐管の取出しが確実に
行えるものである。As detailed above, the sewage branch pipe obtained by the present invention has a structure in which the pipe body having the socket and the saddle collar are integrally molded, so it can be manufactured at a lower cost compared to conventional sewage branch pipes. Instead, when constructing sewage piping using this, there is no risk of it falling into the main pipe even if subjected to vibrations, impact, etc., and branch pipes can be reliably removed. It is.
第1〜3図は、本発明の一実施例を示すもり〕であって
、第1図は射出成形によって得らhた中間製品を示す縦
断面図、第一図は中間製品を外金型で包囲して拡径した
受口を成形する工程の縦断面図、第3図は本発明の製法
によって得られた下水用支管の縦断面図である。
/・・・・・・・・管体、 //、・・曲・受口、/7
!・・・・・・・サドル鍔、 コ・・・叩・外金型、
3・・・・・・内金型Figures 1 to 3 show an embodiment of the present invention; Figure 1 is a longitudinal sectional view showing an intermediate product obtained by injection molding; Figure 1 is a longitudinal cross-sectional view showing an intermediate product obtained by injection molding; Fig. 3 is a longitudinal sectional view of a sewage branch pipe obtained by the manufacturing method of the present invention. /・・・・・・・Pipe body, //, ・・Song/Socket, /7
!・・・・・・Saddle tsuba, Ko...beating/outer mold,
3...Inner mold
Claims (1)
口を有する下水用支管を製造するにあたり、まず一端外
周にサドル鍔を有する管体を射出成形によって一体成形
し、次いで該管体の他端部を加熱軟化させてから外金型
で包囲し。、管体内に加圧流体を導入して外金型の成形
内壁面に密着するまで膨出させて拡径した受口を成形す
ることを特徴とする下水用支管の製法。In manufacturing a sewage branch pipe that has a saddle flange on the outer periphery of one end of the tube and an enlarged diameter socket on the other end, first, the tube body with the saddle flange on the outer periphery of one end is integrally molded by injection molding, and then The other end of the tube is heated and softened, and then surrounded by an outer mold. A method for manufacturing a sewage branch pipe, which comprises introducing a pressurized fluid into the pipe body and expanding the pipe until it comes into close contact with the molded inner wall surface of an outer mold, thereby forming a socket with an enlarged diameter.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21562381A JPS58114912A (en) | 1981-12-28 | 1981-12-28 | Manufacture of branch pipe for sewerage |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21562381A JPS58114912A (en) | 1981-12-28 | 1981-12-28 | Manufacture of branch pipe for sewerage |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS58114912A true JPS58114912A (en) | 1983-07-08 |
JPH0115372B2 JPH0115372B2 (en) | 1989-03-16 |
Family
ID=16675461
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP21562381A Granted JPS58114912A (en) | 1981-12-28 | 1981-12-28 | Manufacture of branch pipe for sewerage |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS58114912A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04308736A (en) * | 1991-04-05 | 1992-10-30 | Aron Kasei Co Ltd | Molding method |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012037015A (en) * | 2010-08-11 | 2012-02-23 | Kubota-Ci Co | Branch pipe joint |
JP5855148B2 (en) * | 2014-02-27 | 2016-02-09 | クボタシーアイ株式会社 | Branch fitting |
JP5902785B2 (en) * | 2014-10-22 | 2016-04-13 | クボタシーアイ株式会社 | Branch fitting |
-
1981
- 1981-12-28 JP JP21562381A patent/JPS58114912A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04308736A (en) * | 1991-04-05 | 1992-10-30 | Aron Kasei Co Ltd | Molding method |
Also Published As
Publication number | Publication date |
---|---|
JPH0115372B2 (en) | 1989-03-16 |
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