JPS6398409A - Valve molding apparatus - Google Patents
Valve molding apparatusInfo
- Publication number
- JPS6398409A JPS6398409A JP24500786A JP24500786A JPS6398409A JP S6398409 A JPS6398409 A JP S6398409A JP 24500786 A JP24500786 A JP 24500786A JP 24500786 A JP24500786 A JP 24500786A JP S6398409 A JPS6398409 A JP S6398409A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- cavity
- insert
- valve body
- molds
- 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
- 238000000465 moulding Methods 0.000 title claims description 13
- 238000003780 insertion Methods 0.000 claims description 15
- 230000037431 insertion Effects 0.000 claims description 15
- 239000000463 material Substances 0.000 abstract description 13
- 230000006835 compression Effects 0.000 abstract description 7
- 238000007906 compression Methods 0.000 abstract description 7
- 229920002430 Fibre-reinforced plastic Polymers 0.000 abstract description 4
- 239000011151 fibre-reinforced plastic Substances 0.000 abstract description 4
- 239000013013 elastic material Substances 0.000 abstract 1
- 230000002093 peripheral effect Effects 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000156 glass melt Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 230000002747 voluntary effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/748—Machines or parts thereof not otherwise provided for
- B29L2031/7506—Valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
- F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
- F02D9/107—Manufacturing or mounting details
Landscapes
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Lift Valve (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、バタフライ弁用の弁体成形装置に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a valve body forming device for a butterfly valve.
最近、バタフライ弁の弁体には繊維強化プラスチック（
以下、ｒＦＲＰＪという）からなるものが用いられるよ
うになり、この種の弁体成形装置として、例えば特開昭
５８−１２４６０９号公報に示されるように、円板状弁
体の上下面を形成するための円盤面を有する上下一対の
円柱状金型と、円板状弁体の外周縁を形成するための弧
状溝を有する左右一対の割金型とから構成され、割合型
の対向面に円板状弁体内を肖通する弁軸挿通孔の形成用
軸状金型の両端部がはまる直線状溝を形成したものがあ
る。Recently, fiber-reinforced plastic (
(hereinafter referred to as rFRPJ) came to be used, and as this type of valve body forming device, for example, as shown in Japanese Patent Application Laid-Open No. 124609/1980, the upper and lower surfaces of a disc-shaped valve body are formed. It consists of a pair of upper and lower cylindrical molds each having a disc surface for the purpose of the valve body, and a pair of left and right split molds each having an arcuate groove for forming the outer periphery of the disc-shaped valve body. There is one in which a linear groove is formed into which both ends of a shaft-shaped mold for forming a valve shaft insertion hole passing through the plate-shaped valve body are fitted.
しかし、上述のものでは弁体内に弁軸を挿通するための
インサートを埋設するには好適ではなかった。However, the above-mentioned valve is not suitable for embedding an insert for inserting the valve shaft into the valve body.
また、この成形装置は予め圧縮量を見込んだＦＲＰ材料
を下方の円柱状金型の上端面に載置し、次いで輪状金型
を装填して一体に結合した割金型を芯合わせ状態で前記
下方の円柱状金型とはめ合わせる構成からなっているの
で、金型の作動機構が複雑になるという問題があった。In addition, this molding device places the FRP material whose compression amount has been estimated in advance on the upper end surface of the lower cylindrical mold, then loads the annular mold, and aligns the split molds that are joined together. Since it is configured to fit into a lower cylindrical mold, there is a problem in that the operating mechanism of the mold becomes complicated.
そこで本発明は、弁体内に弁軸を挿通するためのインサ
ートを埋設するのに適すると共に、簡単な金型の作動機
構によってインサートの上下に圧縮量を見込んだ所望量
のＦＲＰ材料を容易に装填できる弁体成形装置を提供す
ることを目的とじている。Therefore, the present invention is suitable for embedding an insert for inserting a valve stem into a valve body, and also allows for easy loading of a desired amount of FRP material considering the amount of compression above and below the insert using a simple mold operating mechanism. The purpose is to provide a valve body molding device that can
上記目的達成のため本発明は、円板状弁体の上下面を形
成するための円盤面を有する上部金型と下部金型と、前
記円板状弁体の外周縁を形成するための弧状溝を有する
左側金型と右側金型とを備えた弁体成形装置において、
前記左側金型と右側金型とをそれぞれ上部金型方向へ付
勢して支持する弾性部材を設け、前記各金型を合致させ
て形成されるキャビティ内にその端部を配した弁軸挿通
インサート装着用ピンを前記左側金型と右側金型の相対
向する位置に出入可能に嵌挿したことを特徴としている
。To achieve the above object, the present invention provides an upper mold and a lower mold having disc surfaces for forming the upper and lower surfaces of a disc-shaped valve body, and an arc-shaped mold for forming the outer peripheral edge of the disc-shaped valve disc. In a valve body forming device equipped with a left side mold and a right side mold having grooves,
An elastic member is provided to urge and support the left side mold and the right side mold toward the upper mold, and the valve shaft is inserted into the valve shaft with its end disposed in a cavity formed by matching each of the molds. The present invention is characterized in that an insert mounting pin is inserted into and removably inserted into opposing positions of the left side mold and the right side mold.
以下、本発明の一実施例を図面に基づいて説明する。 Hereinafter, one embodiment of the present invention will be described based on the drawings.
第１図は弁体成形装置の金型閉状態の断面図、第２図は
金型開状態の断面図、第３図はピンの先端にインサート
を装着した状態の平面図を示し、弁体成形装置１は、最
下部のベッド２に固定された下部金型３と、ベッド２に
上下可動に設けられたベース型４と、ベース型４上に載
置されて左右方向へ可動する左側金型５と、この左側金
型５に対向してベース型４上に固定された右側金型６と
、下金型３の上方に下金型３に対向して配置されて上下
に可動する上部金型７とを有し、ベッド２とベース型４
との間には、ベース型４とこのベース型４上に載置され
た左側金型５と右側金型６とを上部金型７方向へ付勢し
て支持するコイルスプリング８が複数個設けられている
。これにより、第一 ４ −
２図に示す金型開状態において、コイルスプリング８の
付勢力によりベース型４の下面がベッド２の押圧面２１
から所望ｔｉｔだけ持ち上げられる。Figure 1 is a sectional view of the valve body molding device with the mold closed, Figure 2 is a sectional view of the mold open, and Figure 3 is a plan view of the valve body molding device with an insert attached to the tip of the pin. The molding apparatus 1 includes a lower mold 3 fixed to a bed 2 at the bottom, a base mold 4 provided on the bed 2 so as to be movable up and down, and a left mold placed on the base mold 4 and movable in the left-right direction. A mold 5, a right mold 6 facing the left mold 5 and fixed on the base mold 4, and an upper part disposed above the lower mold 3 facing the lower mold 3 and movable up and down. It has a mold 7, a bed 2 and a base mold 4.
A plurality of coil springs 8 are provided between the base mold 4 and the left mold 5 and right mold 6 placed on the base mold 4 by urging them toward the upper mold 7. It is being As a result, in the mold open state shown in FIG.
It is lifted by the desired tit.
尚、右側金型６は左右方向に可動であってもよい。Note that the right mold 6 may be movable in the left-right direction.
前記下部金型３の上端面には、円板状弁体９の下面を形
成する円盤面１０が形成されており、上部金型７の下端
面には、円板状弁体９の上面を形成する円盤面１１が形
成されている。A disk surface 10 forming the lower surface of the disk-shaped valve body 9 is formed on the upper end surface of the lower mold 3, and a disk surface 10 forming the lower surface of the disk-shaped valve body 9 is formed on the lower end surface of the upper mold 7. A disk surface 11 is formed.
また、左側金型５と右側金型６には円板状弁体９の外周
縁を形成する弧状溝１２．１２がそれぞれ形成されてい
る。Furthermore, arcuate grooves 12 and 12 forming the outer peripheral edge of the disc-shaped valve body 9 are formed in the left mold 5 and the right mold 6, respectively.
これにより、弁体成形装置１を第１図に示されるように
閉状態にすると、上部金型７を支持する枠体が左右側金
型６，７の上面を押圧し、ベース型４の下面がベッド２
の押圧面２１と圧接する。As a result, when the valve body molding device 1 is brought into the closed state as shown in FIG. is bed 2
It comes into pressure contact with the pressing surface 21 of.
そして円盤面１０．１１及び弧状溝１２．１２間に円板
状弁体９を成形するキャビティ１３が形成される。A cavity 13 for molding the disc-shaped valve body 9 is formed between the disc surface 10.11 and the arcuate groove 12.12.
さらに、左側金型５の右側金型６との対向面１４には、
キャビティ１３に連続する半円形状の溝１５がキャビテ
ィ１３の両側に形成され、右側金型６の対向面１６にも
キャビティ１３に連続する半円形状の溝１７がキャビテ
ィ１３の両側に形成されており、左側金型５と右側金型
６とを合致させて両溝１５．１７によりキャビティ１３
の両側に形成される孔１８．１８には弁軸挿通インサー
ト装着用ピン１９．１９がその端部を前記キャビティ１
３に出入可能に嵌挿されている。Furthermore, on the surface 14 of the left mold 5 facing the right mold 6,
A semicircular groove 15 continuous to the cavity 13 is formed on both sides of the cavity 13, and a semicircular groove 17 continuous to the cavity 13 is also formed on the opposing surface 16 of the right mold 6 on both sides of the cavity 13. Then, the left mold 5 and the right mold 6 are matched and the cavity 13 is formed by both grooves 15 and 17.
A pin 19.19 for attaching a valve shaft insertion insert is inserted into the hole 18.18 formed on both sides of the cavity 1.
3 so that it can be inserted and removed.
次に、このように構成された弁体成形装置１による高強
度ＦＲＰ弁体の成形について説明する。Next, molding of a high-strength FRP valve body using the valve body molding apparatus 1 configured as described above will be explained.
先ず、第２図に示される金型開状態から、第３図に示さ
れるように、ピン１９．１９をキャビティ１３内に進入
させてピン１９．１９の先端にインサート２０．２０を
装着し、左側金型５を第２図及び第３図において右方に
移動して下部金型３と左側金型５と右側金型６とにより
、上方が開放されたキャビティ１３を形成し、このキャ
ビティ１３内に合成樹脂とガラスｍｅｌｔを混合したＦ
ＲＰ材料をインサー１〜２０．２０の上下に仕込む。First, from the mold open state shown in FIG. 2, as shown in FIG. 3, the pin 19.19 is advanced into the cavity 13 and the insert 20.20 is attached to the tip of the pin 19.19. The left mold 5 is moved to the right in FIGS. 2 and 3, and the lower mold 3, the left mold 5, and the right mold 6 form a cavity 13 with an open upper part. F with synthetic resin and glass melt mixed inside
Place the RP material on the top and bottom of inserts 1-20.
このとき、左側金型５と右側金型６は、コイルスプリン
グ８の付勢力により、ベース２から所望量ｔだけ持ち上
げられているので、インサート２０．２０の下方と円盤
面１０との間に圧縮量を見込んだマット状ＦＲＰＵ料を
容易に装填することができる。そして、インサート２０
．２０の上方にも同量のＦＲＰ材料を装填する。At this time, the left mold 5 and the right mold 6 are lifted by the desired amount t from the base 2 due to the biasing force of the coil spring 8, so that compression occurs between the lower part of the insert 20, 20 and the disk surface 10. It is possible to easily load a matte FRPU material in an appropriate amount. And insert 20
．． The same amount of FRP material is also loaded above No. 20.
次いで、上部金型７を下降させ、左側金型５と右側金型
６とをコイルスプリング８の付勢力に抗して下方へ押動
しながら第１図に示される閉状態になる迄下降させる。Next, the upper mold 7 is lowered, and the left mold 5 and the right mold 6 are pushed downward against the biasing force of the coil spring 8 until they reach the closed state shown in FIG. .
これにより、キャビティ１３内に仕込まれた材料は充分
に圧縮されて、キャビティ１３内に円板状弁体９が、弁
軸挿通インサート２０．２０を埋設して成形される。As a result, the material charged into the cavity 13 is sufficiently compressed, and the disc-shaped valve body 9 is formed in the cavity 13 with the valve shaft insertion insert 20, 20 embedded therein.
そして、所定の時間が経過してＦＲＰ材料が硬化した後
、ピン１９．１９を後退させ、次いで上部金型７を上方
へ移動し、左側金型５を左方へ移動して第２図に示され
る金型開状態にして円板状弁体９を取り出す。After a predetermined period of time has elapsed and the FRP material has hardened, the pins 19 and 19 are moved back, and then the upper mold 7 is moved upward and the left mold 5 is moved to the left, as shown in FIG. The mold is opened in the shown state and the disc-shaped valve body 9 is taken out.
本発明に係る弁体成形装置は以上のように構成されてい
るので、弁軸挿通インサートの埋設が容易にできるとと
もに、圧縮量を見込んだＦＲＰ祠利の仕込みをインサー
トの上下に均一に行うことができ、さらに圧縮によるＦ
ＲＰ材料の流れも均一化できるから、Ｊ：り均質な弁体
を成形することができる。Since the valve body molding device according to the present invention is configured as described above, it is possible to easily embed the valve shaft insertion insert, and to uniformly prepare the FRP mortar in consideration of the amount of compression above and below the insert. , and furthermore, F due to compression
Since the flow of the RP material can also be made uniform, a more homogeneous valve body can be formed.
尚、上記実施例では、左側金型と右側金型とを付勢する
弾性部材にコイルスプリングを使用したもので説明した
が、ゴム等の弾性部材を用いてもよく、また、インサー
トを分離型のもので説明したが一体型のものであっても
よい。In the above embodiment, a coil spring is used as the elastic member that biases the left side mold and the right side mold, but an elastic member such as rubber may also be used. Although it has been explained above, it may also be an integrated type.
本発明は以上のように、円板状弁体の上下面を形成する
ための円盤面を有する上部金型と下部金型と、前記円板
状弁体の外周縁を形成で−るための弧状溝を有する左側
金型と右側金型とを備えた弁体成形装置において、前記
左側金型と右側金型とをそれぞれ上部金型方向へ付勢し
て支持する弾性部材を設け、前記各金型を合致させて形
成されるキャビティ内にその端部を配した弁軸挿通イン
サート装着用ビンを前記左側金型と右側金型の相対向す
る位置に出入可能に嵌挿したので、円板状弁体に弁軸挿
通インサートを容易に埋設できるとともに、ＦＲＰ材料
の仕込みをインサー１〜の上下に均一に行うことができ
、また圧縮によるＦＲＰ材料の流れも均一化できるから
、より均質な弁体を成形することができる。As described above, the present invention includes an upper mold and a lower mold having disc surfaces for forming the upper and lower surfaces of a disc-shaped valve body, and a mold for forming the outer peripheral edge of the disc-shaped valve disc. In a valve body forming apparatus equipped with a left mold and a right mold having arcuate grooves, an elastic member is provided to bias and support the left mold and the right mold in the direction of the upper mold, respectively. A valve shaft insertion insert mounting bottle whose end was placed in the cavity formed by matching the molds was inserted into and removably into the opposing positions of the left and right molds, so that the disc In addition to being able to easily embed the valve shaft insertion insert in the shaped valve body, the FRP material can be charged evenly above and below the inserter 1, and the flow of the FRP material due to compression can also be made uniform, resulting in a more homogeneous valve. You can mold your body.
図は本発明の一実施例を示すもので、第１図は金型閉状
態の断面図、第２図は金型開状態の断面図、第３図はピ
ンの先端にインサートを装着した状態の平面図である。
１・・・弁体成形装置 ２・・・ベッド ３・・・
下部金型 ４・・・ベース ５・・・左側金型
６・・・右側金型 ７・・・上部金型 ８・・・コ
イルスプリング ９・・・円板状弁体 １０，１１
・・・円盤面１２・・・弧状溝 １３・・・キャビテ
ィ １８・・・ビン挿通孔 １９・・・ピン ２
０・・・インサート手続補正書
昭和６２年４月１５日
特許庁長官 黒 １）明 雄 殿
昭和６１年特許願第２４５００７号
２、発明の名称
弁 体 成 形 装 置
３、補正をする者
事件との関係 特許 出 願 人
（６１７）三菱樹脂株式会社
４、代理人
東京都千代田区鍛冶町−丁目９番１６号５、補正命令の
日付
自発提出
８、補正の内容
（１） 明細書第４頁第１５行の「図面」を「第１図
乃至第３図」に訂正する。
（２）同書第９頁第１４行の「取り出す。」と第１５行
し本発明に」の間に以下の文章を挿入する。
［第４図は本発明の別の実施例を示す平面図で、左側金
型３０と右側金型３１とはそれぞれ左右方向に可動に設
りられ、円板状弁体９の外周縁を形成する弧状溝１２．
１２がぞれぞれ形成されている。
また、左側金型３０には、右側金型３１との対向面３２
に直交する方向に弁軸挿通インサート２０の装着用ピン
３３の挿通孔３４が穿設され、下部金型（図示せず）に
固設された装着用ピン３３が該挿通孔３４に挿通され、
その端部をキャビティ１３内に臨ませている。
さらに、右側金型３１には、左側金型３０との対向面３
５に直交し、かつ、前記装着用ピン３３に対応する位置
に弁軸挿通インサー１−２０の装着用ピン３６の挿通孔
３７が穿設され、該挿通孔３７に装着用ピン３８がキャ
ビティ１３内にその端部を出入可能に嵌挿されている。
」
（４）同書第１１頁第１４行の「図は」を「第１図乃至
第３図は」に訂正する。
（５）同書第１２頁第２行の１平面図」の次に「、第４
図は本発明の別の実施例を示す平面図」を挿入する。
（６）図面の第４図を別紙の通り追加する。
以 上The figures show one embodiment of the present invention. Figure 1 is a cross-sectional view of the mold in the closed state, Figure 2 is a cross-sectional view of the mold in the open state, and Figure 3 is a state in which an insert is attached to the tip of the pin. FIG. 1... Valve body forming device 2... Bed 3...
Lower mold 4...Base 5...Left side mold
6...Right side mold 7...Upper mold 8...Coil spring 9...Disc-shaped valve body 10, 11
... Disk surface 12 ... Arc-shaped groove 13 ... Cavity 18 ... Bottle insertion hole 19 ... Pin 2
0... Insert procedure amendment April 15, 1988 Commissioner of the Japan Patent Office Black 1) Akio Yu, Patent Application No. 245007 of 1988 2, Title of invention Valve body molding device 3, Case of the person making the amendment Relationship with Patent Applicant (617) Mitsubishi Plastics Co., Ltd. 4, Agent 9-16-16-chome, Chiyoda-ku, Tokyo 5, Date of amendment order Voluntary submission 8, Contents of amendment (1) Specification No. 4 "Drawings" in line 15 of the page is corrected to "Figures 1 to 3." (2) Insert the following sentence between "Take out." on page 9, line 14 of the same book and "Into the present invention" on line 15. [FIG. 4 is a plan view showing another embodiment of the present invention, in which a left mold 30 and a right mold 31 are provided movably in the left-right direction, respectively, and form the outer periphery of the disc-shaped valve body 9. arcuate groove 12.
12 are formed respectively. In addition, the left side mold 30 has a surface 32 facing the right side mold 31.
An insertion hole 34 for a mounting pin 33 of the valve shaft insertion insert 20 is bored in a direction perpendicular to the valve shaft insertion insert 20, and a mounting pin 33 fixed to a lower mold (not shown) is inserted into the insertion hole 34.
Its end portion faces into the cavity 13. Furthermore, the right side mold 31 has a surface 3 facing the left side mold 30.
An insertion hole 37 for a mounting pin 36 of the valve shaft insertion inserter 1-20 is drilled at a position perpendicular to 5 and corresponding to the mounting pin 33, and a mounting pin 38 is inserted into the insertion hole 37 into the cavity 13. The end portion is inserted into and removable inside. (4) In the same book, page 11, line 14, ``The figure is'' is corrected to ``Figures 1 to 3 are''. (5) ``, 4th floor plan'' in the second line of page 12 of the same book.
The figure is a plan view showing another embodiment of the invention. (6) Add Figure 4 of the drawings as attached. that's all
Claims (1)
る上部金型と下部金型と、前記円板状弁体の外周縁を形
成するための弧状溝を有する左側金型と右側金型とを備
えた弁体成形装置において、前記左側金型と右側金型と
をそれぞれ上部金型方向へ付勢して支持する弾性部材を
設け、前記各金型を合致させて形成されるキャビティ内
にその端部を配した弁軸挿通インサート装着用ピンを前
記左側金型と右側金型の相対向する位置に出入可能に嵌
挿したことを特徴とする弁体成形装置。1. An upper mold and a lower mold having disk surfaces for forming the upper and lower surfaces of the disk-shaped valve body, and a left side mold having an arcuate groove for forming the outer periphery of the disk-shaped valve body. In the valve body forming apparatus, the left side mold and the right side mold are formed by providing an elastic member that biases and supports the left side mold and the right side mold respectively toward the upper mold, and aligning the respective molds. A valve body molding device, characterized in that a pin for attaching a valve shaft insertion insert, the end of which is arranged in a cavity, is inserted into and removably into opposing positions of the left and right molds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24500786A JPH0722939B2 (en) | 1986-10-15 | 1986-10-15 | Valve body forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24500786A JPH0722939B2 (en) | 1986-10-15 | 1986-10-15 | Valve body forming device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6398409A true JPS6398409A (en) | 1988-04-28 |
| JPH0722939B2 JPH0722939B2 (en) | 1995-03-15 |
Family
ID=17127186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24500786A Expired - Lifetime JPH0722939B2 (en) | 1986-10-15 | 1986-10-15 | Valve body forming device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0722939B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109774176A (en) * | 2019-02-28 | 2019-05-21 | 深圳市莱美斯硅业有限公司 | Band fiber skeleton foamed silica gel pad preparation method and device |
| CN113733435A (en) * | 2021-07-30 | 2021-12-03 | 西安航天发动机有限公司 | Combined type valve core cold press molding tool and molding process |
| KR102537759B1 (en) * | 2022-10-24 | 2023-06-02 | (주)제이엠지테크 | Butterfly valve and manufacturing method thereof |
-
1986
- 1986-10-15 JP JP24500786A patent/JPH0722939B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109774176A (en) * | 2019-02-28 | 2019-05-21 | 深圳市莱美斯硅业有限公司 | Band fiber skeleton foamed silica gel pad preparation method and device |
| CN113733435A (en) * | 2021-07-30 | 2021-12-03 | 西安航天发动机有限公司 | Combined type valve core cold press molding tool and molding process |
| KR102537759B1 (en) * | 2022-10-24 | 2023-06-02 | (주)제이엠지테크 | Butterfly valve and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0722939B2 (en) | 1995-03-15 |
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