JPS6051411B2 - Manufacturing method of resin valve box - Google Patents
Manufacturing method of resin valve boxInfo
- Publication number
- JPS6051411B2 JPS6051411B2 JP58014941A JP1494183A JPS6051411B2 JP S6051411 B2 JPS6051411 B2 JP S6051411B2 JP 58014941 A JP58014941 A JP 58014941A JP 1494183 A JP1494183 A JP 1494183A JP S6051411 B2 JPS6051411 B2 JP S6051411B2
- Authority
- JP
- Japan
- Prior art keywords
- valve box
- manufacturing
- resin
- valve
- seat
- 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
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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Lift Valve (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
本発明は、弾性シートを備えた樹脂製弁箱の製造方法に
関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a resin valve box provided with an elastic sheet.
樹脂製弁箱の従来例として第３図に示すように、樹脂の
みを用いて成形した弁箱２１に、弾性シート２２を接着
剤にて取付けるようにしているが、かかる構成の弁箱２
１は、小口径の弁を構成することはできるものの、弁箱
自体の強度を充分に高め難く、しかも、シート２２の取
付強度を充分に高め難い点に起因して、大口径の弁を構
成することはできないものであつた。As shown in FIG. 3, as a conventional example of a resin valve box, an elastic sheet 22 is attached with adhesive to a valve box 21 molded only using resin.
1, although it is possible to construct a small-diameter valve, it is difficult to sufficiently increase the strength of the valve box itself, and furthermore, it is difficult to sufficiently increase the mounting strength of the seat 22. Therefore, it is difficult to construct a large-diameter valve. It was something that could not be done.
本発明の目的は、弾性シートを精度良く、且つ、強度大
なる状態で弁箱に取付けることができる樹脂製弁箱の製
造方法を提供する点にある。An object of the present invention is to provide a method for manufacturing a resin valve box that allows an elastic sheet to be attached to the valve box with high precision and high strength.
本発明による樹脂製弁箱製造方法の特徴構成は、弾性シ
ート、及び、補強繊維を弁箱成形用型内に設置し、その
後、樹脂を前記型内に加圧注入する点にある。次に、本
案特徴構成による作用効果を述べる。A characteristic feature of the resin valve box manufacturing method according to the present invention is that an elastic sheet and reinforcing fibers are placed in a mold for molding a valve box, and then resin is injected into the mold under pressure. Next, the effects of the feature configuration of the present invention will be described.
；すなわち、補強繊維によつて弁箱の強度を充分に高せ
ることができ、しかも、シートを弁箱に一体成形してあ
るから、例えばシートを成形後の弁箱にボルト固定する
と、弁箱がボルト挿通孔等の加工のために強度低下を生
じるものとなるが、それを回避できると共に、シートの
取付精度を高めることができ、さらに、シートを弁箱に
一体成形する点と、樹脂の加圧注入に伴つて弾性圧縮変
形された状態で弁箱に保持されるシートがその弾性復元
力で弁箱に接合する点との相剰により、シートを弁箱に
強度大なる状態で取付けることができ’る。上記作用に
より、弁箱に充分な強度を備えさせることができ、しか
も、シートを所定の位置に正確に位置させることができ
、そのうえ、シートを剥離の生じないように強固に取付
けることができるのであり、もつて、大口径の弁箱を製
造する際にも便利に使用できる樹脂製弁箱の製造方法を
得るに至つた。In other words, the reinforcing fibers can sufficiently increase the strength of the valve body, and since the seat is integrally molded with the valve body, for example, when the seat is bolted to the molded valve body, the valve body However, this can be avoided and the seat mounting accuracy can be improved.Furthermore, the seat is integrally molded with the valve body, and the resin The seat is held in the valve box in an elastically compressed and deformed state due to pressurized injection, and the seat is attached to the valve box with its elastic restoring force, so that the seat can be attached to the valve box in a strong state. can be done. The above action makes it possible to provide the valve box with sufficient strength, and also allows the seat to be accurately positioned at a predetermined position, as well as to securely attach the seat to prevent it from peeling off. Finally, we have achieved a method for manufacturing a resin valve box that can be conveniently used even when manufacturing large-diameter valve boxes.
以下、本発明の実施例を図面に基ついて説明する。Embodiments of the present invention will be described below with reference to the drawings.
第１図は、バタフライ弁に使用する樹脂製弁箱１の製造
方法を示し、弁箱内周面成形用の一対の中型２、２、及
び、弁箱外周面成形用の外型３を設けてある。Fig. 1 shows a method of manufacturing a resin valve box 1 used for a butterfly valve, in which a pair of middle molds 2, 2 for molding the inner circumferential surface of the valve box and an outer mold 3 for molding the outer circumferential surface of the valve box are provided. There is.
そして、ＣＲ、ＥＰＴ等の軟質ゴム製の環状弾性シート
４を、そのシート面側部分を中型２、２に係合させた状
態で弁箱成形用型２、２、３内に設置すると共に、プリ
フオームした補強繊維５を、弁箱成形用型２，２，３内
に設置する。Then, an annular elastic sheet 4 made of soft rubber such as CR or EPT is installed in the valve box molding molds 2, 2, 3 with the sheet side portions engaged with the middle molds 2, 2, and The preformed reinforcing fibers 5 are placed in the valve box molding molds 2, 2, 3.
その後、不飽和ポリエステル等の熱硬化性樹脂を、湯口
６より前記型２，２，３内に加圧注入して、弁箱１にシ
ート４を一体成形する。上記の如く製造した弁箱１に、
第２図に示すように、補強繊維７を備えた樹脂製弁体８
を組付け、もつて、弁体８の回転に伴つて弁箱内流路を
開閉するバタフライ弁を構成してある。Thereafter, a thermosetting resin such as unsaturated polyester is injected under pressure into the molds 2, 2, 3 through the sprue 6, and the sheet 4 is integrally molded into the valve box 1. In the valve box 1 manufactured as described above,
As shown in FIG. 2, a resin valve body 8 equipped with reinforcing fibers 7
are assembled to form a butterfly valve that opens and closes the flow path in the valve box as the valve body 8 rotates.
本発明の製造方法は、バタフライ弁用弁箱の製造に使用
する他、仕切弁における弁箱製造に使用する等、各種の
弁における弁箱製造に使用できる。The manufacturing method of the present invention can be used for manufacturing valve boxes for various valves, such as for manufacturing valve boxes for gate valves, in addition to being used for manufacturing valve boxes for butterfly valves.
そして、弾性シート４としては、軟質ゴムの他、ポリ四
フッ化エチレン等の樹脂製のものが使用できる。As the elastic sheet 4, in addition to soft rubber, a material made of resin such as polytetrafluoroethylene can be used.
図面は本発明に係る樹脂製弁箱の製造方法の実施例を示
し、第１図は弁箱成形状態を示す縦断側面図、第２図は
シート装着部の拡大縦断側面図である。
第３図は従来例の縦断側面図である。１・・・・・・樹
脂製弁箱、２，２，３・・・・・・弁箱成形用ｌ型、４
・・・・・・弾性シート、５・・・・・・補強繊維。The drawings show an embodiment of the method for manufacturing a resin valve box according to the present invention, with FIG. 1 being a longitudinal side view showing a molded state of the valve box, and FIG. 2 being an enlarged longitudinal side view of the seat mounting portion. FIG. 3 is a longitudinal sectional side view of the conventional example. 1...Resin valve box, 2, 2, 3...L type for molding the valve box, 4
...Elastic sheet, 5...Reinforcement fiber.
Claims (1)
つて、前記シート４、及び、補強繊維５を弁箱成形用型
２，２，３内に設置し、その後、樹脂を前記型２，２，
３内に加圧注入することを特徴とする樹脂製弁箱の製造
方法。1. A method for manufacturing a resin valve box 1 equipped with an elastic sheet 4, in which the sheet 4 and reinforcing fibers 5 are placed in valve box molding molds 2, 2, and 3, and then the resin is poured into the mold. 2, 2,
3. A method for manufacturing a resin valve box, characterized by pressurized injection into the interior of the valve box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58014941A JPS6051411B2 (en) | 1983-01-31 | 1983-01-31 | Manufacturing method of resin valve box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58014941A JPS6051411B2 (en) | 1983-01-31 | 1983-01-31 | Manufacturing method of resin valve box |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59140043A JPS59140043A (en) | 1984-08-11 |
| JPS6051411B2 true JPS6051411B2 (en) | 1985-11-13 |
Family
ID=11874979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58014941A Expired JPS6051411B2 (en) | 1983-01-31 | 1983-01-31 | Manufacturing method of resin valve box |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6051411B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011190874A (en) * | 2010-03-15 | 2011-09-29 | Sekisui Chem Co Ltd | Valve box for butterfly valve and method of manufacturing the same |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5751376Y2 (en) * | 1973-02-19 | 1982-11-09 |
-
1983
- 1983-01-31 JP JP58014941A patent/JPS6051411B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59140043A (en) | 1984-08-11 |
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