TW201302422A - Ball valve molding by inner encapsulation - Google Patents

Abstract

The present invention provides a ball valve molding by inner encapsulation, which is to encapsulate a ball shell on the exterior of a valve ball, and employing the encapsulation injection molding method to place both the valve ball and the ball shell in the mold cavity to form the valve shell by injection molding, wherein the valve ball will be prevented from thermally melted by an isolation means. The present invention may firmly prevent the direct contact of the valve shell with the valve ball to enhance the production yield of the ball valve, and the tightness between the valve ball and the ball shell may be controlled for always keeping consistent tightness and enhancing the pressure resistance of the ball valve.

Description

Inner overmolded ball valve

The present invention relates to a ball valve disposed between liquid lines for controlling the opening and closing of a liquid, and more particularly to an improved design of a ball valve integrally formed by overmolding.

Pressing, generally between the pipelines for conveying liquid, a ball valve for controlling the opening and closing of the liquid is provided to facilitate the control of the flow and maintenance pipeline.

The ball valve is mainly installed in the valve body, and a ball type ball is arranged, and the ball is connected to a valve body to provide switching control, and the diameter of the valve ball is larger than the through hole of the valve body to avoid reducing the flow.

There are two main types of ball valves. One is a combined ball valve. The ball valve with a diameter larger than the valve body is placed in the valve body. The other is, as shown in Figure 14, the ball valve 90 is the first. After the valve ball 91 is injected, the valve ball 91 is placed in another molding cavity, and the valve body 92 is formed by coating and injection molding. The seed cover 91 is integrally wrapped and formed, although the structure is small and free. The advantages of the installation and the water stopping effect are good, but it is easy to occur. In the process of coating the injection molding valve body 92, the valve ball 91 is likely to be partially combined with the valve body 92, affecting the process yield, and the injection. When the valve body 92 is formed to cover the valve ball 91, the tightness of the valve body 92 covering the valve ball 91 cannot be controlled. Therefore, the formed ball valve 90 tends to be too tight, and the rotation of the valve ball 91 is not easy.

In addition, before the ball valve 90 is formed, the water stop ring 92 is placed at the two ends of the valve ball 91, and the valve body 92 is molded and buried, but when the valve body 92 is injected, the injection pressure is generated in the cavity, which will stop the water. The ring 92 is pushed away from the preset position, so that the inner covering and forming water stop can not achieve the desired effect, and it is easy to leak water.

Therefore, designing a ball valve integrally formed by injection molding, and avoiding the heat fusion of the valve ball and the valve body, and controlling the tightness of the valve body covering the valve ball during injection molding, is the focus of research and development of the present invention.

In view of the fact that the present invention has a ball valve integrally formed by injection molding, and then the valve ball is combined with the injection molding method to form the valve body, the valve ball is prone to partial heat fusion and valve body assembly, which affects the process yield. However, the tightness of the valve body covering the valve ball cannot be controlled, and the formed ball valve is often too tight, so that the valve ball is not easily rotated. The inventors have finally introduced the present invention after many modifications and improvements.

The invention provides an inner overmolded ball valve, comprising: a valve ball, a water passing hole is arranged in the middle, and a control handle is extended on one side of the outer periphery.

a spherical shell is wrapped around the outer circumference of the valve ball, and a through hole is provided at each end of the water passing hole, and a punch is provided at the control handle, and the valve ball is placed in the spherical shell, and The control handle is extended by the through hole so that the valve ball can be rotated in a plane in the spherical shell.

a valve shell enclosing the valve ball and the spherical shell, wherein the valve shell has a valve chamber, and each of the valve chambers is provided with a water conduit corresponding to two ends of the water passage hole, and the other end of the valve chamber is provided There is a control socket corresponding to the control handle. The valve ball and the spherical shell are disposed in a mold, and the valve ball and the spherical shell are located in the valve chamber, and the control handle is extended by the control hole.

The main purpose of the over-molded ball valve of the present invention is that it is covered with a spherical shell outside the valve ball, and then the ball ball is covered with the spherical ball in a state of being assembled in a mold to form a valve casing, by being isolated. The means, not to be hot-melted to the ball, can indeed prevent direct contact between the valve shell and the valve ball, thereby increasing the process yield of the ball valve.

The main purpose of the over-molded ball valve of the present invention is that the state in which the ball is covered by the spherical shell is set in a mold to inject and form the valve casing, and the tightness between the valve ball and the spherical shell can be controlled not only. It can always maintain the consistency of the tightness, so as to increase the consistency of the control force when the ball is rotated, and at the same time enhance the pressure resistance of the ball valve.

In the following, the preferred embodiment of the present invention will be described in detail with reference to the drawings. As shown in the first, second and third figures, the over-molded ball valve 10 of the present invention comprises: a valve ball 11 a spherical shape, a water-passing hole 111 is formed in the middle, and a control handle 112 is extended on one side of the outer periphery. The control handle 112 is integrally formed by injection molding or forming. The valve ball 11 is made of plastic, metal or ceramic. .

A spherical shell 12 is directly wrapped around the spherical outer periphery of the valve ball 11, and a through hole 121 is defined at each end of the water passing hole 111, and the through hole 121 is larger than the water passing hole 111, A through hole 122 is formed in the handle 112, and a cutting slit 123 is formed between the two through holes 121. The valve ball 11 is made of plastic or metal.

The spherical shell 12 is elastically stretched by the cutting slit 123. See the arrow in the second figure to accommodate the valve ball 11 in the spherical shell 12, and the control handle 112 is extended by the through hole 122. The valve ball 11 can be rotated in a plane in the spherical shell 12, which is matched with the fourth figure.

Wherein, the cutting slit 123 of the spherical shell 12 has the manner of setting the positions of the second and third figures, and can also be formed in the manner of setting the positions in the fifth and sixth figures, and the equivalent functionality is used.

The water stop ring 13 is a ring-shaped material which is made of Teflon and is provided with water stop. It is respectively disposed at the two ends of the water passage hole 111 of the valve ball 11 and in the through hole 121 of the spherical shell 12.

The valve shell 11 is covered, the spherical shell 12 and the two water stop rings 13 are sprayed out of the formed valve casing 14. The valve casing 14 has a valve chamber 141, and each of the valve chambers 141 is provided with a water conduit 142 at each end. Corresponding to the two ends of the water passing hole 111, the other end of the valve chamber 141 is provided with a control hole seat 143 corresponding to the control handle 112, and the two water pipes 142 are respectively connected to the water end and the water outlet end.

The valve ball 11 , the spherical shell 12 and the two water stop rings 13 are disposed in a mold to project out the valve casing 14 . The valve ball 11 and the spherical shell 12 are located in the valve chamber 141 . The water stop ring 13 And respectively corresponding to the two-way water pipe 142, the two water-stopping rings 13 are used to prevent the two-way water pipe 142 from leaking into the liquid end and the water-end end, and the liquid is prevented from leaking to the control hole 143. The control handle 112 is The control socket 143 is extended to provide a handle 15 as shown in the seventh figure.

The spherical shell 12 is wrapped around the valve ball 11, and the valve ball 11 is covered with the spherical shell 12, and is placed in a mold to project out the valve casing 14. Therefore, when the spherical shell 12 is made of metal, the valve casing 14 is used. The injection molding does not heat-melt the metal spherical shell 12, and can surely prevent the direct contact between the valve casing 14 and the valve ball 11, thereby increasing the process yield of the ball valve 10; when the spherical shell 12 is plastic, the valve casing 14 By injection molding, only the spherical shell 12 is thermally fused, and heat is not melted to the valve ball 11, and the direct contact between the valve casing 14 and the valve ball 11 can be surely prevented, thereby increasing the process yield of the ball valve 10.

The state in which the valve ball 11 is covered by the spherical shell 12 is disposed in a mold to project out the valve casing 14. The tightness between the valve ball 11 and the spherical shell 12 can be controlled not only, but also can maintain the tightness forever. Consistently, the consistency of the control force is increased when the valve ball 11 is rotated and the pressure resistance of the ball valve 10 is enhanced.

The spherical shell of the present invention has a further structural design. As shown in the eighth, ninth, tenth, eleventh, twelfth and thirteenth figures, the spherical shell 12' is joined by a left half piece 12A and a right half piece 12B. The ball shell 12' is formed to be wrapped around the outer circumference of the valve ball 11, and a through hole 121' is disposed at each end of the water passage hole 111, corresponding to the control handle 112. The perforation 122', the left half piece 12A and the right half piece 12B are convexly combined with a pressing lip 123', and the pressing lip 123' can increase between the left half piece 12A and the right half piece 12B. The sealing degree is provided, and the water stop ring 13' is disposed between the water passing hole 111 and the through hole 121', and is formed by injection molding of the valve casing 14, thereby increasing the water stopping effect.

10. . . Ball valve

11. . . Valve ball

111. . . Water hole

112. . . Control handle

12. . . Spherical shell

121. . . Through hole

122. . . perforation

123. . . Cutting seam

13. . . Water stop ring

14. . . Valve housing

141. . . Valve room

142. . . Water pipe

143. . . Control socket

15. . . handle

12’. . . Spherical shell

12A. . . Left half

12B. . . Right half

121’. . . Through hole

122’. . . perforation

123’. . . Pressing lip

13’. . . Water stop ring

90. . . Ball valve

91. . . Valve ball

92. . . Valve body

A. . . Hot Melt

First Figure: A perspective combination and partial cross-sectional view of the present invention.

Second figure: An exploded perspective view of a valve ball and a spherical shell according to the present invention.

The third figure: a three-dimensional combination diagram of the valve ball and the spherical shell of the present invention.

Fourth Figure: A cross-sectional view of the combination of the present invention.

Fig. 5 is an exploded perspective view showing another valve ball and a spherical shell of the present invention.

Figure 6 is a perspective view of another combination of the valve ball and the spherical shell of the present invention.

Figure 7: The present invention contains a stereoscopic view of the handle.

Figure 8 is a perspective exploded and partial cross-sectional view of the present invention.

Ninth view: a three-dimensional combination and partial cross-sectional view of the present invention.

Tenth figure: Another stereoscopic combination diagram of the valve ball and the spherical shell of the present invention.

Figure 11: Partially enlarged view of the tenth figure A.

Twelfth Figure: A cross-sectional view of a valve ball and a spherical shell according to the present invention.

Thirteenth Figure: Partially enlarged view of the twelfth Figure B.

Figure 14: A cross-sectional view of the combined formula.

10. . . Ball valve

11. . . Valve ball

111. . . Water hole

112. . . Control handle

12. . . Spherical shell

13. . . Water stop ring

14. . . Valve housing

141. . . Valve room

142. . . Water pipe

143. . . Control socket

Claims (10)

An inner overmolded ball valve comprises: a valve ball, a water passage hole is arranged in the middle, and a control handle is extended on one side of the outer circumference; a spherical shell can be wrapped on the outer circumference of the valve ball, There should be a through hole at each end of the water passage hole, and a corresponding hole is provided at the control handle, the valve ball is placed in the spherical shell, and the control handle is extended by the through hole to make the valve ball a planar rotation can be performed in the spherical shell; and a valve casing covering the valve ball and the spherical shell is formed, the valve casing has a valve chamber, and each of the valve chambers is provided with a water conduit corresponding to each other The other end of the valve chamber is provided with a control hole seat corresponding to the control handle, and the valve ball and the spherical shell are disposed in a mold to form a valve housing, and the valve ball and the spherical shell are located at the valve The control handle is extended by the control socket. The over-molded ball valve according to claim 1, wherein the spherical shell is provided with a cutting seam, and the spherical shell is elastically stretched by the cutting slit, so that the valve ball is placed in the spherical shell Inside. The over-molded ball valve according to claim 2, wherein the cutting slit is disposed between the two through holes. The over-molded ball valve according to the first aspect of the invention, wherein the through hole is larger than the water-passing hole, and further comprises: a water stop ring, which is annular, and is respectively disposed on the valve ball. The two ends of the water hole are in the through hole of the spherical shell; the valve shell is injection molded to cover the two water stop rings. The ball valve which is overmolded as described in claim 4, wherein the water stop ring is made of Teflon. The over-molded ball valve of claim 1, wherein the control handle provides a handle. The over-molded ball valve of claim 1, wherein the valve ball is plastic, metal or ceramic. The over-molded ball valve of claim 1, wherein the valve ball is plastic or metal. The over-molded ball valve according to claim 1, wherein the spherical shell is formed by a left half piece and a right half piece, and the left half piece and the right half piece are combined. There is a press lip. The ball valve which is overmolded as described in claim 1 , further comprising: a water stop ring, which is formed in an annular shape, respectively disposed between the water passing hole and the through hole, and is ejected by the valve casing Forming and simultaneously covering the two water stop rings.