JPS58177335A - Method of molding seat ring of butterfly valve - Google Patents
Method of molding seat ring of butterfly valveInfo
- Publication number
- JPS58177335A JPS58177335A JP5964382A JP5964382A JPS58177335A JP S58177335 A JPS58177335 A JP S58177335A JP 5964382 A JP5964382 A JP 5964382A JP 5964382 A JP5964382 A JP 5964382A JP S58177335 A JPS58177335 A JP S58177335A
- Authority
- JP
- Japan
- Prior art keywords
- core metal
- seat ring
- supports
- mold
- forming
- 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
- 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
- B29C45/14065—Positioning or centering articles in the mould
-
- 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
- B29C45/14065—Positioning or centering articles in the mould
- B29C2045/14131—Positioning or centering articles in the mould using positioning or centering means forming part of the insert
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
この発明はしよう形弁に用いるシートリングの成形方法
ＶＣ関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method VC for forming a seat ring for use in a tapered valve.
弁本体内周面に、ゴムのような弾性材料からなるシート
リングを張設し、弁閉成時に弁本体と井、取外周縁との
間（でこのシートリングを圧縮Ｉ〜て／−ル作用を奏す
るよう［Ｃ［、た周知のちょう形弁にら・いて、このシ
ートリングの反撥弾性を調整し、ノートリングを実質的
に補強するために、内部に９属リンダのような剛性材料
を封入したものが従来からひろく用いらｎている。第１
図はこのようなシートリングの一例を示すもので、鎖線
で示すす［本体２の内面に、内部に剛性材料からなる環
状の芯金１２を封入し、外部をゴムのような弾性材料１
１で〜つたシートリング１′ｆ！：張設しである。A seat ring made of an elastic material such as rubber is stretched around the inner circumferential surface of the valve body, and when the valve is closed, the seat ring is compressed between the valve body and the outer peripheral edge of the valve. In order to adjust the repulsion of this seat ring and to substantially reinforce the note ring, a rigid material such as a 9-cylinder cylinder is installed inside the well-known butterfly valve. Conventionally, those containing the following have been widely used.
The figure shows an example of such a seat ring, which is indicated by a chain line.A ring-shaped core bar 12 made of a rigid material is enclosed inside the main body 2, and an elastic material 1 such as rubber is enclosed on the outside.
1 seat ring 1'f! : It is stretched.
このような従来から公知のシートリングを形成すり［＋
は、第２図に示すように、円型の外金型３と、中子に相
当する内金型４との間に環状空所を形成し、内金型は、
その直径方向対向位置に、弁：ｌ＃ｌ＋を挿通すべき孔
を形成するためのビン５．乙に１って支持し、前記環状
空所内に、前記ビンに装架さｎ；化芯金１２を配置する
。なお第２図は、第１図ｘ−ｘｌｊｌで示す位置に相当
する金型側の個所を示す断面とする。Such a conventionally known seat ring forming slide [+
As shown in FIG. 2, an annular cavity is formed between a circular outer mold 3 and an inner mold 4 corresponding to the core, and the inner mold is
At the diametrically opposite position, a hole is formed through which the valve l#l+ is inserted. A core bar 12 mounted on the bottle is disposed within the annular space. Note that FIG. 2 is a cross section showing a location on the mold side corresponding to the position indicated by x-xljl in FIG. 1.
このように芯金を配した後環状空所にニジストマーを注
入成形するわけであるが、芯金１２を正確（ｌこ位置決
め、保持するために、第２図に示すように外金型６から
芯金に達するピン７．８を配して成形作業をおこなうの
が普通であ５５゜しかしながら、このような成形手段を
とると、成形後のシートリングＱては当然ピン７．８に
相当する個所に孔が残り、そのままにしておけば芯金が
外気Ｋｍ出してシートリングの寿命６て悪影皆全およぼ
すことをまぬかｎず、この孔を成形後に埋めｎはよいが
、そ扛だけコストアップＶこつながり好ましくない。After arranging the core bar in this way, the annular cavity is injected with a nystomer. In order to accurately position and hold the core bar 12, it is removed from the outer mold 6 as shown in Fig. 2. It is normal to carry out forming work by arranging a pin 7.8 that reaches the core metal. However, if such a forming method is used, the seat ring Q after forming naturally corresponds to pin 7.8. There will be holes left in these places, and if you leave them as they are, the core metal will let out outside air, which will extend the lifespan of the seat ring.It is good to fill these holes after molding, but only if you do so. This is not desirable as it increases the cost.
またピン７．８の精度あるいは芯金側のこ、ｆ′Ｌに整
合する孔の精度（でよって全型内空所の芯金り〕位置決
め精度が左右さｎることになり、この調整が困難である
。In addition, the accuracy of the pin 7.8 or the accuracy of the hole aligned with the saw on the core metal side, f'L (and therefore the core metal of the entire mold cavity) positioning accuracy will be affected by this adjustment. Have difficulty.
さらにピンとピンの中間位置にある芯金部分がニジスト
マーの注入圧によって局部的に歪を生ずることがある。Furthermore, the core metal portion located between the pins may be locally distorted due to the injection pressure of the nidistomer.
こｆ′Ｌを防止するには、ピン７．８に相当する芯金支
持部材を増加すｎばよいが、１戊形後ン一トリング外面
にそｎだけ多数の孔カニのこるから好ましくないことは
前述のとおりである。In order to prevent this f'L, it is possible to increase the number of core metal supporting members corresponding to pins 7 and 8, but this is undesirable since a large number of holes will be formed on the outer surface of the ring after one round. is as described above.
この発明は以上のような公知のシー１− ＩＪング成１
し方法の欠陥にかんがみてなさｎｆｃものであって、井
−ｈ挿通孔形成用のピン５．乙の間にある芯金部／＋）
こ（は、適度の弾性をそなえた支持部材を適数配設して
エラストマーを注入成形し、成形後（は前記支詩部材ヲ
７−トリング材１１の一部としてその−＋、ま使用する
ようにして前述のような公知の成形〕ｊ法の欠へ全解消
する成形方法を提供することをＬ１途とするものである
。The present invention is based on the above-mentioned well-known technology.
In view of the flaws in the method, the pin for forming the I-H insertion hole was not used. Core metal part between B/+)
The elastomer is injection-molded by disposing an appropriate number of support members with appropriate elasticity, and after molding, the support members are used as part of the support member 7-tring material 11. In this way, the first objective is to provide a molding method that completely eliminates the deficiencies of the known molding method J as described above.
第６図は本発明による成形方法を示す金型の説明図であ
つ一１同図においては、第２図と同様な；４４！ ５）
に（ｒｉ同一の符号を付しである。第６図に示す、［う
に、金型内環状空所にピン５．乙によって支持さＩして
いる芯金１２の外周には、適度の弾性を−そなえた、た
とえばフェノール樹脂製の支持部材９が復数個装着さｔ
ていて、こｎによって芯金を友侍、位置決めしている。FIG. 6 is an explanatory diagram of a mold showing the molding method according to the present invention. 5)
As shown in FIG. - A plurality of supporting members 9 made of, for example, phenol resin are attached.
This is used to position the core metal.
こｎら支持部材９は、外ａ型乙の上型と下型が開放さｎ
ている状態のときすこ図示のように装着するものとし、
その高さく紙面（・こ垂直方向の高さ）ハ、環状空所の
そｎよりも若干大とし、上下型を閉基した楊８（・で、
型に裏って各支持部材が圧縮さｆるようにしておくもの
とする。このために金型を閉塞したときには支持部材は
型Ｖ？：、よって紙面に垂直方向から押圧さｎ−ｃ紙面
に平行な方向に拡開傾向となるから、こｎによって芯金
１２は半径方向に外側から内側へつよく押圧さｎて強固
にその位置を保持子ゐことになゐ。These support members 9 are such that the upper and lower molds of the outer type A are open.
It shall be worn as shown in the figure when
The height of the paper (vertical height) is slightly larger than that of the annular space, and the upper and lower molds are closed.
Each support member shall be compressed against the mold. For this reason, when the mold is closed, the support member is placed in the mold V? : Therefore, the core metal 12 is pressed from the direction perpendicular to the plane of the paper and tends to expand in the direction parallel to the plane of the paper, so that the core bar 12 is strongly pressed from the outside to the inside in the radial direction and firmly maintains its position. Of course it's a retainer.
エラストマー注入成形後は、支持部、材９を抜脱するこ
となくそのままシートリング拐の一部としてｆ重用すｎ
ばよい。After the elastomer injection molding, the support part and material 9 can be used as part of the seat ring without being removed.
Bye.
本発明は以上のような構成をそなえていつから、ｕｉｌ
述の公辿手段における支持ビン７．８等（ｌ′ｃよろ孔
が、成形後に残ることがなく、支持部材９を芯金周縁に
多数配置することができるから、少数・７〕ピン７．８
を用いる場合のように、ピンの存（Ｅ（７ない区域にあ
る芯金部分が局部的に変形することがなく、またピン７
．８等と芯金の紹合の〕易台とことなって暉ｊ性材料同
士を機械的に接合することがないから、憬械的な誤差に
よる芯ａの位置決め不整合を生ずることがない。The present invention has the above-mentioned configuration, and since when did the ui
Support pins 7.8, etc. (l'c diagonal holes in the above-mentioned public track means do not remain after molding, and a large number of support members 9 can be arranged around the core metal, so a small number of pins 7) are used. 8
As in the case of using the pin (E), the core part in the area where there is no pin (E
．． Unlike the case of the introduction of the 8th grade and the core metal, there is no need to mechanically join the flexible materials to each other, so there is no misalignment in the positioning of the core a due to mechanical errors.
さら（１こ本発明においては各支持部材の支持、芯金−
＼の押圧作用を、芯金の存在する平面（紙面に性行な面
）と直角方向して加える押圧力を利用してなさしめてい
るから、支持部材のすｎｌこｔ′ＬｖＣもとづく芯金の
位置のすｆ′Ｌヲ生ずることがなく正確Ｖ（位１′！決
めすることができるなどきわめて有効な発明である。Furthermore (1) In the present invention, the support of each support member, the core bar -
Since the pressing action of ＼ is achieved by using the pressing force applied perpendicular to the plane where the core metal exists (the plane facing the paper surface), the pressure of the core metal based on the support member's This is an extremely effective invention, as it is possible to accurately determine the position V(1'!) without causing the position f'L.
第４図ＡＨ本発明の他の実施態様を示すものであって、
このものでは、弾性支持部材９の一部がメを鍛型３の所
定位置に形成した凹所４１に係合している。このように
構成することによって支持部材う；型内においてみだり
に動いたりすることがなく、また成形後は、この部分が
シートリング外周；ｆｉ＋ （ＩＣ突出するので、こｎ
がシートリングを弁本体に係上する場合にガイドとなる
。FIG. 4 AH shows another embodiment of the present invention,
In this case, a part of the elastic support member 9 is engaged with a recess 41 formed at a predetermined position in the forging die 3. With this configuration, the supporting member will not move unnecessarily within the mold, and after molding, this part will be the outer periphery of the seat ring;
serves as a guide when attaching the seat ring to the valve body.
第４図Ｂは、支持部材９が位置する部分におい＝Ｃ外金
型６Ｖ（、空所内方へ突出する突部４２を形、Ｊルしで
ある。こｎによって、成形後支持部材が７一トリ／グ外
周而から突出しないようにしである。FIG. 4B shows that in the part where the support member 9 is located, the protrusion 42 protruding inwardly into the cavity is shaped like the outer mold 6V.As a result, after molding, the support member 7 Make sure that it does not protrude from the outside.
また前記第６図々示のように支持部材９を配す石場合、
各支持部材の、芯金の反対側対同位（１’ｆ （Ｃも支
持部材を配置することも勿論可能であって、こｎによっ
て芯金をより正確ｆｆＣ位置決め可能となる。Furthermore, in the case of a stone in which supporting members 9 are arranged as shown in the sixth figure,
Of course, it is also possible to arrange the supporting members on the opposite side of the cored metal at the same position (1'f (C) of each supporting member, and this allows for more accurate positioning of the cored metal ffC.
また支持部材の位置決め精度を向−トさせるためＣで、
第４図Ａに示すような、支持部材９を受容する凹Ｐｆｒ
４１に相当する凹所を芯金１２の外周面（こ形成するこ
とも可能である。In addition, in order to improve the positioning accuracy of the support member,
A recess Pfr for receiving the support member 9 as shown in FIG. 4A
It is also possible to form a recess corresponding to 41 on the outer peripheral surface of the core bar 12.
第４図Ｃは本発明のさらに他の実施態様を示すものであ
って、このものにおいては、芯金１２（て蝮数個の貫通
孔をもうけ、支持部材９を、こｆ′Ｌを貫ｄして内外両
金型面によって支持す心よう（こしたものであって、支
持部材をその両端面で支持するために支持精度を向上さ
せる効果がある。この＠８にも、該支持部材９を、内金
型３に達しない程度のノ★さとし、あるいは、こｎらの
ものの外金型１ｕｌｌ ＆て、前記第４図ＡＶｃ示すよ
うな支持を安定イヒす／）ための手ＩＱ ｋ付加するこ
とももちろん町・ｆｉｊである。FIG. 4C shows still another embodiment of the present invention, in which the core metal 12 (having several through holes formed therein) allows the support member 9 to pass through this hole f'L. d, which is supported by both the inner and outer mold surfaces, and has the effect of improving support accuracy because the support member is supported by both end surfaces. 9 to a size that does not reach the inner mold 3, or use the outer mold 1ull of these items to stably support it as shown in Figure 4 AVc/). Of course, it is also a town/fij that can be added.
さらにまた前記第３図、第４図Ａ、Ｂ、＆Ｃにお・コに
点線で示したように剛性材料からなるピンを挿通して支
持部材の位置決めを補強するように構成してもよい。Furthermore, as shown by dotted lines in FIGS. 3, 4A, B, &C, a pin made of a rigid material may be inserted to reinforce the positioning of the support member.
第１図は公知の典型的なシートリングの構成を示す一部
切截斜面図、
第２図はシートリングを成型するための公知の型（・て
よるシートリング成形方法を示す平断面図、第６図は本
発明によるシートリング成形方法を示す平断面図、
第４図Ａ Ｉ ” ％及びＣは本発明の他の実施態様を
示す要部の平断面図である。
１・・・シートリング、 ２・・・弁本体、 ６・
・・外金型、 ４・・・内金型、 ５，６・・・弁
軸孔成形用ピン、７．８・・・支持ピン、 ９・・・
支持部材、 １２・・・芯金Fig. 1 is a partially cutaway perspective view showing the configuration of a typical known seat ring; Fig. 2 is a plan sectional view showing a seat ring forming method using a known mold for forming the seat ring; FIG. 6 is a plan sectional view showing a sheet ring forming method according to the present invention, and FIG. Ring, 2...Valve body, 6.
... Outer mold, 4... Inner mold, 5, 6... Valve stem hole forming pin, 7.8... Support pin, 9...
Supporting member, 12...core metal
Claims (1)
に弁軸挿通孔形成用の１対のビンで環状赤金を支持し、
該芯金の前記ビンに支持さｎていない部分の、少なくと
も芯金と前記外金型側内傾向との間ＶＣ弾性材料からな
る複数個の支持部＋Ａを嵌挿し、外金型を形、成する上
下両型を閉基して前記環状空所を形成するさいに前記支
持部材を押圧圧縮することによって各支持部材を芯金方
向（・（押圧するようにしたちょう形弁のシートリング
成形方、去。An annular cavity is formed between the outer mold and the inner mold, and a ring-shaped red gold is supported within this cavity by a pair of bottles for forming a valve shaft insertion hole,
Shaping the outer mold by inserting a plurality of support parts +A made of a VC elastic material between at least the core metal and the inward tendency of the outer mold in the portion of the core metal that is not supported by the bottle; When forming the annular cavity by closing both the upper and lower molds, the support members are pressed and compressed to form the seat ring of the butterfly valve in such a manner that each support member is pressed in the direction of the core metal (. Well, leave.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5964382A JPH0233494B2 (en) | 1982-04-12 | 1982-04-12 | CHOGATABENNOSHIITORINGUSEIKEIHOHO |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5964382A JPH0233494B2 (en) | 1982-04-12 | 1982-04-12 | CHOGATABENNOSHIITORINGUSEIKEIHOHO |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58177335A true JPS58177335A (en) | 1983-10-18 |
| JPH0233494B2 JPH0233494B2 (en) | 1990-07-27 |
Family
ID=13119100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5964382A Expired - Lifetime JPH0233494B2 (en) | 1982-04-12 | 1982-04-12 | CHOGATABENNOSHIITORINGUSEIKEIHOHO |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0233494B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4795667A (en) * | 1986-05-01 | 1989-01-03 | Libbey-Owens-Ford Co. | Vehicle window assembly having a retention shield and method and apparatus for producing same |
| EP0673738A2 (en) * | 1994-03-26 | 1995-09-27 | Blanco GmbH & Co. KG | Moulded part, particularly fitted sink, and method of manufacturing the same |
| JP2002327849A (en) * | 2001-04-27 | 2002-11-15 | Akebono Brake Ind Co Ltd | Ring mold type dust boots, its manufacturing method and molding die |
| FR3057478A1 (en) * | 2016-10-14 | 2018-04-20 | Valeo Systemes De Controle Moteur | DEVICE FOR MAINTAINING AN OVERMOLD INSERT DURING THE MOLDING OF A VALVE BODY |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001327622A (en) * | 2000-05-23 | 2001-11-27 | Senju Sprinkler Kk | Simultaneous opening valve |
-
1982
- 1982-04-12 JP JP5964382A patent/JPH0233494B2/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4795667A (en) * | 1986-05-01 | 1989-01-03 | Libbey-Owens-Ford Co. | Vehicle window assembly having a retention shield and method and apparatus for producing same |
| EP0673738A2 (en) * | 1994-03-26 | 1995-09-27 | Blanco GmbH & Co. KG | Moulded part, particularly fitted sink, and method of manufacturing the same |
| EP0673738A3 (en) * | 1994-03-26 | 1995-11-15 | Blanco Gmbh & Co Kg | Moulded part, particularly fitted sink, and method of manufacturing the same. |
| JP2002327849A (en) * | 2001-04-27 | 2002-11-15 | Akebono Brake Ind Co Ltd | Ring mold type dust boots, its manufacturing method and molding die |
| JP4531289B2 (en) * | 2001-04-27 | 2010-08-25 | 曙ブレーキ工業株式会社 | Ring mold type dust boot, manufacturing method thereof and mold |
| FR3057478A1 (en) * | 2016-10-14 | 2018-04-20 | Valeo Systemes De Controle Moteur | DEVICE FOR MAINTAINING AN OVERMOLD INSERT DURING THE MOLDING OF A VALVE BODY |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0233494B2 (en) | 1990-07-27 |
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