JPH0626861B2 - Manufacturing method of integrally molded ball valve - Google Patents
Manufacturing method of integrally molded ball valveInfo
- Publication number
- JPH0626861B2 JPH0626861B2 JP2160693A JP16069390A JPH0626861B2 JP H0626861 B2 JPH0626861 B2 JP H0626861B2 JP 2160693 A JP2160693 A JP 2160693A JP 16069390 A JP16069390 A JP 16069390A JP H0626861 B2 JPH0626861 B2 JP H0626861B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- ball
- manufacturing
- valve
- integrally molded
- 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 - Fee Related
Links
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
- Molding Of Porous Articles (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は一体成形ボールバルブの製造方法に関する。TECHNICAL FIELD The present invention relates to a method for manufacturing an integrally molded ball valve.
（従来の技術） 従来のボールバルブは第１図に示す如く弁体となるボー
ル１′及びその流路１′ａの出入側を包囲するシール
２′をバルブケーシング３′に内装するためにバルブケ
ーシングを左右２個３′ａ、３′ｂに分割し、シール
１′及びシール２′を装着したのちに螺合することによ
り組立てるものである。なお、図面では４′はスピンド
ル、５′及び６′はＯリング、７′はハンドルである。(Prior Art) As shown in FIG. 1, a conventional ball valve is a valve in which a ball 1'which serves as a valve body and a seal 2'which surrounds the inlet and outlet sides of a flow passage 1'a thereof are installed in a valve casing 3 '. The casing is divided into two left and right parts 3'a and 3'b, and the seal 1'and the seal 2'are mounted and then assembled by screwing. In the drawing, 4'is a spindle, 5'and 6'are O-rings, and 7'is a handle.
（発明が解決しようとする課題） 従来製品は上記の如き結合製品とされることから、製造
上の複雑な問題やシールなどの問題を含めコストが高く
なるなどの欠点があつた。(Problems to be Solved by the Invention) Since conventional products are combined products as described above, there are drawbacks such as high cost including complicated manufacturing problems and problems such as sealing.
本発明は斯有る欠点を除去した一体成形ボールバルブの
新規な製造方法を提供せんとするものである。The present invention aims to provide a novel method for manufacturing an integrally molded ball valve that eliminates the above drawbacks.
（課題を解決するための手段） 本発明は中心部に流路を有すると共にこれと直交する方
向にハンドル装着用スピンドルの形成されたボールと、
該ボールの流路出入側を包囲するシールとを埋設状態に
して一体成形される樹脂製バルブケーシングを成形する
樹脂材料に予め発泡剤の一定量を混入させておき、これ
を金型を使用し金型内へ低圧で注入しながら発泡成形さ
せて製造することを特徴とする。(Means for Solving the Problem) The present invention has a ball having a flow path in the center and a handle mounting spindle formed in a direction orthogonal to the flow path,
A fixed amount of a foaming agent is mixed in advance with a resin material for molding a resin-made valve casing that is integrally molded with a seal that surrounds the flow path inlet / outlet side of the ball, and this is used in a mold. It is characterized by being foam-molded while being injected into the mold at a low pressure.
本発明の作用は以下の実施例により具体的に説明され
る。The operation of the present invention will be specifically described by the following examples.
（実施例） 第２図Ａ、Ｂは製造状態を示すもの、第３図はボールを
示すものであつてＡは正面図、Ｂは同側面図である。(Example) FIGS. 2A and 2B show a manufacturing state, FIG. 3 shows a ball, where A is a front view and B is a side view thereof.
1aは上金型、1bは下金型であつて夫々れの中央箇所に希
望する寸法及び形状で二分されるバルブケーシング２の
雌型が形成されてなる。３は金属或は樹脂などで予め製
作されてなるボールであつて、球状をなした弁部3aとス
ピンドル3bとからなり、且つ弁部中央に流路3cが穿設さ
れてなる。４はＯリング、５は流路3cの出入側に当接さ
れるようになされるシールである。1a is an upper mold, and 1b is a lower mold, and a female mold of a valve casing 2 is formed at a central position of each of the two molds with a desired size and shape. Reference numeral 3 is a ball made of metal or resin in advance, which is composed of a spherical valve portion 3a and a spindle 3b, and a flow passage 3c is formed at the center of the valve portion. Reference numeral 4 is an O-ring, and 5 is a seal adapted to come into contact with the inlet / outlet side of the flow path 3c.
一方、６は上金型1aと下金型1bで左右対称に保持固定さ
れるための１対の保持入子であつて、夫々れ上金型1aと
下金型1bに挾持されて固定される固定部6aと弁体を形成
する雌型内に向つて突出する大小の段付突起6bとからな
り、大段部6b1は外周に雄ネジＳを刻設し、且つ小段部6
b2の外経は上記弁部3aの流路3cの内経と同一となされて
いる。On the other hand, 6 is a pair of holding inserts which are symmetrically held and fixed by the upper mold 1a and the lower mold 1b, and are held and fixed by the upper mold 1a and the lower mold 1b, respectively. A fixed portion 6a and a large and small stepped projection 6b protruding toward the inside of the female die forming the valve body. The large stepped portion 6b 1 is engraved with a male screw S on the outer circumference, and the small stepped portion 6b is formed.
The outer diameter of b 2 is the same as the inner diameter of the flow path 3c of the valve portion 3a.
他方、７は樹脂注入ゲートであつて、溶融樹脂の流れが
対称となるようにスピンドル部3bと反対側の下金型1bの
底部位置に設けてある。On the other hand, a resin injection gate 7 is provided at the bottom position of the lower mold 1b on the side opposite to the spindle portion 3b so that the flow of the molten resin is symmetrical.
ところで、上記金型内に注入される樹脂液には予め適量
の発泡剤が注入されてなり、且つ該樹脂液の注入には通
常の射出成形のそれより低い圧力で注入する。こゝに注
入された樹脂液は金型内部で発泡剤により内部から全体
に均一な圧力が加えられるものとなつて、シール３、シ
ール５、スピンドル部3b、Ｏリング４及び上下金型1a、
1bなどの各部と接する箇所は滑らかな表面を形成するも
のとなる。By the way, an appropriate amount of a foaming agent is previously injected into the resin liquid injected into the mold, and the resin liquid is injected at a lower pressure than that of normal injection molding. The resin liquid injected into the mold is applied with a uniform pressure from the inside by the foaming agent inside the mold, and the seal 3, the seal 5, the spindle part 3b, the O-ring 4 and the upper and lower molds 1a,
The part that contacts each part such as 1b forms a smooth surface.
しかして、樹脂液の固形化後上下金型1a、1bを開放して
弁箱を取出し、左右の保持入子６を回転抜きするのであ
り、第４図は斯くして製造された製品断面図である。Then, after solidification of the resin liquid, the upper and lower molds 1a and 1b are opened, the valve box is taken out, and the left and right holding inserts 6 are rotated and removed. FIG. 4 is a sectional view of the product thus manufactured. Is.
本発明の実施で使用するボールは金属や樹脂材などを使
用するが、樹脂材の場合はバルブケーシング用の樹脂溶
融点より高く、且つ非融着特性を持つ樹脂で製作され
る。なお、保持入子６は専ら金属製として反覆使用する
ものである。The balls used in the practice of the present invention are made of metal, resin material or the like. In the case of resin material, it is made of a resin having a non-fusion property higher than the resin melting point for the valve casing. The holding insert 6 is made exclusively of metal and is used again.
（発明の効果） 本発明では注入樹脂液に発泡剤が混入させてあり、且つ
低圧で注入されることから金型内へ内蔵されているボー
ルなどに対して局部的な高圧力が加わることがなく、即
ちボールなどの変形による封止性能の不良、ボールなど
とバルブケーシングの部分的な融着などを避けることが
できて、極めて品質の優れたボールバルブを安価、且つ
能率良く製造することができるものとなるのである。(Effects of the Invention) In the present invention, since the foaming agent is mixed in the injected resin liquid and the resin is injected at a low pressure, a high pressure may be locally applied to the balls and the like contained in the mold. No, that is, defective sealing performance due to deformation of the ball or the like, partial fusion of the ball or the like with the valve casing can be avoided, and a ball valve of extremely excellent quality can be manufactured inexpensively and efficiently. It will be possible.
第１図は従来品の製造状態を示すもの、第２図Ａ、Ｂは
本発明に係る製造状態を示すもの、第３図は本発明で使
用されるボールを示すものでＡは正面図、Ｂは側面図、
第４図は製品断面図である。 1a……上金型、1b……下金型 ２……バルブケーシング、３……ボール ５……シール、６……保持入子 ７……樹脂注入ゲート。FIG. 1 shows a manufacturing state of a conventional product, FIGS. 2A and 2B show a manufacturing state according to the present invention, FIG. 3 shows a ball used in the present invention, A is a front view, B is a side view,
FIG. 4 is a product sectional view. 1a …… Upper mold, 1b …… Lower mold 2 …… Valve casing, 3 …… Ball 5 …… Seal, 6 …… Holding insert 7 …… Resin injection gate.
Claims (1)
る方向にハンドル装着用スピンドルの形成されたボール
と、該ボールの流路出入側を包囲するシールとを埋設状
態にして一体成形される樹脂製バルブケーシングであつ
て、バルブケーシングを成形する樹脂材料に予め発泡剤
の一定量を混入させておき、これを金型を使用し金型内
へ低圧で注入しながら発泡成形させて製造することを特
徴とした一体成形ボールバルブの製造方法。1. A ball having a flow passage in its center and having a handle mounting spindle formed in a direction orthogonal to the flow passage, and a seal surrounding the flow passage inlet / outlet side of the ball are integrally formed in a buried state. A resin valve casing that is made by mixing a certain amount of a foaming agent in advance with the resin material used to mold the valve casing, and then foaming this while using a mold to inject it into the mold at low pressure. A method for manufacturing an integrally molded ball valve, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2160693A JPH0626861B2 (en) | 1990-06-18 | 1990-06-18 | Manufacturing method of integrally molded ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2160693A JPH0626861B2 (en) | 1990-06-18 | 1990-06-18 | Manufacturing method of integrally molded ball valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0449029A JPH0449029A (en) | 1992-02-18 |
| JPH0626861B2 true JPH0626861B2 (en) | 1994-04-13 |
Family
ID=15720428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2160693A Expired - Fee Related JPH0626861B2 (en) | 1990-06-18 | 1990-06-18 | Manufacturing method of integrally molded ball valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0626861B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH076735B2 (en) * | 1985-12-18 | 1995-01-30 | 株式会社日立製作所 | Gas separation method |
| JP2023042088A (en) * | 2021-09-14 | 2023-03-27 | 堤 康博 | Kitchen knife holder device and kitchen knife |
-
1990
- 1990-06-18 JP JP2160693A patent/JPH0626861B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0449029A (en) | 1992-02-18 |
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