CN211039692U

CN211039692U - Rotation stopping gas cap valve

Info

Publication number: CN211039692U
Application number: CN201921790900.5U
Authority: CN
Inventors: 李学民; 王军社
Original assignee: Foshan A Fine Mold Parts Co ltd
Current assignee: Foshan A Fine Mold Parts Co ltd
Priority date: 2019-10-23
Filing date: 2019-10-23
Publication date: 2020-07-17
Anticipated expiration: 2029-10-23

Abstract

The utility model discloses a spline gas cap valve, including valve body, case, the cavity that link up about being equipped with in the valve body, the case is installed in the cavity, still includes the supporting shoe, the supporting shoe includes spacing face, including the spacing groove in the cavity, supporting shoe and spacing groove sliding connection, the spacing face of supporting shoe and the internal surface butt in spacing groove. The utility model discloses an increase a supporting shoe of taking spacing face in the bottom of current gas top valve, when the case was closed, the pressure that the case upper surface bore can transmit on the supporting shoe, thereby make the pressure that the case bore go in can directly transmitting the mould, thereby the pressure of the contact surface between case and the valve body cavity has been reduced, the wearing and tearing between the two have been reduced, the life of extension case, supporting shoe and valve body sliding connection simultaneously, when the case is in lifting movement, guarantee that the case can not take place the upset.

Description

Rotation stopping gas cap valve

Technical Field

The utility model relates to an injection mold field, especially demoulding mechanism of mould.

Background

In the plastic injection mold, after the product is injection molded, most of the products are demoulded by using a blowing mode, and a common air top valve is used for realizing the blowing function. In the prior art, a gas cap valve generally comprises a valve body and a valve core, wherein a cavity is arranged in the valve body, and the valve core is arranged in the cavity, so that the valve core can move up and down in the valve body. The upper part of the valve core is generally provided with a conical sealing head, the lower part of the valve core is hidden in the cavity, the upper end of the cavity of the valve body is provided with a conical step surface, the valve core is sleeved with a return spring, and the return spring provides pressure, so that the upper end of the cavity is tightly covered by the sealing head of the valve core. Install the valve body in the mould during use, when the complete mould plastics, ventilate toward the mould in, gaseous effect is in the bottom of valve body to produce ascending pressure to the case, the pressure of spring is overcome to atmospheric pressure, forces the case rebound, thereby opens the cavity, and gaseous upper end from the pneumatic valve is discharged, thereby blows off the product of moulding plastics and accomplishing.

But because the top of the valve core is always subjected to the injection molding pressure of a product in the working process, the valve core is completely supported only by the conical step surface. After long-term pressure and reciprocating movement, the conical step surface is easily abraded, so that the sealing is not tight, and the air leakage phenomenon is caused. Meanwhile, after being jacked, the existing valve core may deflect, which has no influence on the conventional conical valve core, but in some products, the cross section of the valve core is not regularly round, which requires that the valve core must strictly move in the up-and-down direction when being jacked, and other movements cannot be generated.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: a gas cap valve structure is provided that overcomes the above-mentioned deficiencies.

The utility model provides a solution of its technical problem is: a rotation stopping gas cap valve comprises a valve body, a valve core and a supporting block, wherein a cavity which is communicated up and down is formed in the valve body, the valve core is installed in the cavity, the supporting block is installed in the cavity, the lower end of the valve core is fixedly installed with the supporting block, the bottom surface of the supporting block is flush with the bottom surface of the valve body, a vent hole is formed in the supporting block, and the vent hole is communicated with the cavity; the supporting block comprises a limiting surface, the cavity comprises a limiting groove, the supporting block is connected with the limiting groove in a sliding mode, and the limiting surface of the supporting block is abutted to the inner surface of the limiting groove.

The utility model has the advantages that: the utility model discloses an increase a supporting shoe of taking spacing face in the bottom of current gas top valve, when the case is closed, the pressure that the case upper surface bore can transmit on the supporting shoe, and because the bottom surface of supporting shoe flushes with the bottom surface of valve body, so the bottom surface of supporting shoe is equivalent to also be the surface butt with the mounting groove of mould, thereby make the pressure that the case bore go in can directly transmitting the mould, thereby the pressure of the contact surface between case and the valve body cavity has been reduced, wearing and tearing between the two have been reduced, the life of extension case, supporting shoe and valve body sliding connection simultaneously, when the case is in lifting movement, guarantee that the case can not take place the upset.

As a further improvement of the technical scheme, the cross section of the supporting block is triangular, the cavity comprises three limiting grooves, and three corners of the supporting block are abutted to the limiting grooves. The supporting block adopts triangle-shaped, can make the supporting block more stable when reciprocating.

As a further improvement of the technical scheme, the valve further comprises a gasket, wherein the gasket is arranged at the bottom of the valve body, and air holes are formed in the gasket. The gasket is added, the installation height of the gas top valve can be conveniently adjusted, and gas introduced into the die can better enter the gas top valve by utilizing the gasket, so that the valve core is jacked.

As a further improvement of the technical scheme, the upper end of the supporting block is provided with a groove, the lower end of the valve core is provided with a convex block, and the convex block is embedded in the groove. And the valve core and the supporting block form good fixed installation by utilizing the interference fit of the convex block and the groove.

As a further improvement of the technical scheme, a compression spring is further arranged in the cavity and sleeved outside the valve core, one end of the compression spring is abutted with the supporting block, and the other end of the compression spring is abutted with the valve body. By using the compression spring, the valve core and the valve body form a good closing state under the condition of no blowing.

As a further improvement of the technical scheme, the upper end of the valve core is in an inverted cone shape, and the upper end of the cavity is also in an inverted cone shape.

Drawings

In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures represent only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from these figures without inventive effort.

Fig. 1 is a cross-sectional view of the present invention;

fig. 2 is a partial sectional exploded view of the present invention.

Detailed Description

The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive labor based on the embodiments of the present invention all belong to the protection scope of the present invention. The preferred embodiment of the present invention is shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution. Meanwhile, all technical characteristics in the invention can be interactively combined on the premise of not conflicting with each other.

The first embodiment is as follows: referring to fig. 1-2, the rotation stopping gas cap valve comprises a valve body 1 and a valve core 2, wherein a cavity 11 which is through from top to bottom is formed in the valve body 1, the valve core 2 is installed in the cavity 11, the rotation stopping gas cap valve further comprises a triangular supporting block 3, the supporting block 3 is installed in the cavity 11, the cavity 11 comprises three sliding grooves 12, three corners of the supporting block 3 are abutted against the three sliding grooves 12, the three corners of the supporting block 3 are used as limiting surfaces, the three sliding grooves in the cavity 11 are used as limiting grooves, and then the limiting surfaces can only slide up and down in the limiting grooves, so that the possibility of overturning of the supporting block 3 is effectively prevented. The upper end of the supporting block 3 is provided with a groove 32, the lower end of the valve core 2 is provided with a lug 21, the lug 21 is embedded in the groove 32, the middle of the supporting block 3 is also provided with an exhaust hole 33, and the exhaust hole faces the groove 32. The bottom surface of the supporting block 3 is flush with the bottom surface of the valve body 1, an air inlet channel 31 is reserved between the supporting block 3 and the cavity 11, because the supporting block 3 is triangular, the cavity 11 is cylindrical, and the supporting block 3 is internally tangent and installed in the cavity 11, three arc-shaped air inlet channels 31 are formed between the supporting block 3 and the cavity 11. A gasket 4 is further arranged below the valve body, and air holes 41 are formed in the gasket. A boss 13 is arranged in the cavity 11, a coil spring 5 is arranged between the boss 13 and the supporting block 3, the upper end of the coil spring 5 is propped against the lower surface of the boss 13, and the lower end of the coil spring is propped against the upper surface of the supporting block.

When the pneumatic jacking valve works, the pneumatic jacking valve is arranged in an installation cavity of a die, the lower surface of the gasket 4 is abutted against the bottom surface of the installation cavity, the upper surface of the gasket 4 is abutted against the bottom surface of the valve body 1, and when the installation cavity is not filled with air, the head of the valve core 2 and the cavity form good sealing under the action of the spiral spring of the valve core 2; and after the injection molding is finished, when a product needs to be ejected, high-pressure air is introduced into the installation cavity, the high-pressure air firstly enters between the gasket and the valve body through the air holes 41 of the gasket 4, then the supporting block 3 is ejected upwards by air pressure, and the supporting block 3 can only vertically slide and cannot rotate due to the fact that the supporting block 3 is integrally triangular and matched with the sliding groove 12 in the cavity. When the supporting block 3 slides upwards, the gap between the supporting block 3 and the gasket 4 is enlarged, then air enters the cavity 11 from the air inlet channel 31, the air continuously jacks up the valve core 2 after entering the cavity 11, when the valve core 2 moves upwards for a certain distance, the valve core 2 and the valve body 1 are not sealed, and the air is smoothly discharged upwards from the valve core 2 and enters a product after being pushed out and molded.

Further as a preferred embodiment, the head of the valve core 2 has a non-circular cross section, the upper end of the valve body 1 includes a second groove adapted to the head of the valve core 2, and the head of the valve core 2 is in sealing connection with the second groove.

In some embodiments, the support block may also be rectangular or hoof-shaped. The valve core can not deflect when moving by utilizing the limiting surface on the supporting block, and simultaneously, the supporting block and the inner cavity of the cavity are utilized

In some embodiments, the elastic member may be a spring plate, an elastic plastic, or other elastic members besides a coil spring. The rest of the structure is the same as the embodiment.

In some embodiments, the valve core and the supporting block can be assembled by using screws instead of interference fit, and the screws are screwed in from the bottom of the supporting block and then screwed all the way to the bottom of the valve core, so that the assembly of the valve core and the supporting block is completed. When the screw is used for assembly, no vent hole is needed to be arranged additionally.

While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the details of the embodiments shown, but is capable of various modifications and substitutions without departing from the spirit of the invention.

Claims

1. The utility model provides a spline gas cap valve, includes valve body, case, be equipped with the cavity that link up from top to bottom in the valve body, the case is installed in the cavity, its characterized in that: the valve body is characterized by further comprising a supporting block, wherein the supporting block is arranged in the cavity, the lower end of the valve core is fixedly arranged with the supporting block, the bottom surface of the supporting block is flush with the bottom surface of the valve body, and an air inlet channel is arranged between the supporting block and the cavity; the supporting block comprises a limiting surface, the cavity comprises a limiting groove, the supporting block is connected with the limiting groove in a sliding mode, and the limiting surface of the supporting block is abutted to the inner surface of the limiting groove.

2. The rotation stop gas cap valve according to claim 1, wherein: the cross-section of the supporting block is triangular, the cavity comprises three limiting grooves, and three corners of the supporting block are abutted to the limiting grooves.

3. The rotation stop gas cap valve according to claim 1, wherein: the valve body is characterized by further comprising a gasket, wherein the gasket is arranged at the bottom of the valve body, and air holes are formed in the gasket.

4. The rotation stop gas cap valve according to claim 1, wherein: the upper end of the supporting block is provided with a groove, the lower end of the valve core is provided with a convex block, and the convex block is embedded into the groove.

5. The rotation stop gas cap valve according to claim 1, wherein: and a compression spring is also arranged in the cavity, the compression spring is sleeved outside the valve core, one end of the compression spring is abutted against the supporting block, and the other end of the compression spring is abutted against the valve body.