Valve production mold

Abstract

This utility model discloses a valve manufacturing mold, including a first mold, a second mold, and a third mold. The first mold includes two first half-molds and a first mold core, which together form a first mold cavity. The two first half-molds have first injection tubes. The second mold includes two second half-molds and a second mold core, which together form a second mold cavity. The two second half-molds have second injection tubes. The third mold includes two third half-molds and a third mold core, which together form a third mold cavity. The two third half-molds have third injection tubes. This utility model has a reasonable structural layout, and its overall structure can accurately replicate the complex internal morphology of valves, such as irregular flow channels. It can meet the performance requirements of valves as core components of fluid control systems without subsequent processing, achieving simultaneous improvement in production efficiency, material utilization, and finished product quality.

Description

Technical Field

[0001] This utility model relates to the field of die-casting mold technology, and in particular to a valve production mold. Background Technology

[0002] As a core component of fluid control systems, valves typically consist of multiple parts, including a valve cover, valve body, and lower end cap. Internally, they require the formation of irregular flow channels, sealing chambers, and high-precision connection interfaces. Therefore, the forming precision of the valve body directly determines its sealing performance, pressure resistance, and service life, placing extremely high demands on the structural rationality and processing adaptability of the production molds. Currently, there are two main methods for valve body production: one is tool cutting, which ensures precision but has a long processing cycle, produces a lot of cutting debris leading to low material utilization, and requires specialized tools for complex internal cavities, resulting in rapid wear and high costs; the other is sand casting, which is lower in cost but has poor sand mold stability, and the finished product is prone to precision defects such as uneven wall thickness and flow channel deformation, requiring secondary correction processing, making it less economical. Utility Model Content

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a valve production mold to solve the problems of long cycle, high cost, low material utilization rate of cutting valve body with cutting tools, and poor accuracy of finished products cast by sand mold, which require secondary correction.

[0004] To solve the above-mentioned technical problems, the present invention provides a valve production mold comprising a first mold, a second mold, and a third mold for respectively forming a valve cover, a valve body, and a lower end cover. The first mold comprises two first half-molds and a first mold core located between the two first half-molds. The two first half-molds and the first mold core together form a first mold cavity for forming the valve cover. A first injection pipe communicating with the first mold cavity is provided on both first half-molds. The second mold comprises two second half-molds and a second mold core located between the two second half-molds. The two second half-molds and the second mold core together form a second mold cavity for forming the valve body. A second injection pipe communicating with the second mold cavity is provided on both second half-molds. The third mold comprises two third half-molds and a third mold core located between the two third half-molds. The two third half-molds and the third mold core together form a third mold cavity for forming the lower end cover. A third injection pipe communicating with the third mold cavity is provided on both third half-molds.

[0005] Furthermore, the first mold core, the second mold core, and the third mold core each include a molding portion that matches the inner surface of the valve cover, the valve body, and the lower end cover, and also include a limiting portion connected to the molding portion, the limiting portion being used to limit the molding portion within the first half mold, the second half mold, and the third half mold.

[0006] Furthermore, the two first half molds together enclose a first cavity that extends vertically. The first mold core has a first molding part that matches the inner surface of the valve cover and a first limiting part disposed at the lower end of the first molding part. The first cavity has a first molding cavity that matches the first molding part and a first limiting cavity that matches the first limiting part. When the first mold core is assembled in the first cavity, the first molding part cooperates with the first molding cavity to form the valve cover. The outer wall of the first limiting part fits against the inner wall of the first limiting cavity to achieve a limiting effect.

[0007] Furthermore, the valve cover includes a cover body and a flow channel connected to and internally communicating with the cover body. The first molding part includes a first portion that matches the cover body and a second portion that matches the flow channel. The second portion and the first portion are spliced ​​together by the limiting action of the first molding cavity.

[0008] Furthermore, the first molding cavity extends outward from the position corresponding to the second portion so that the end of the second portion is exposed outside the first mold, and a notch is provided at the end of the second portion exposed outside the first mold so that the user can apply force there when demolding.

[0009] Furthermore, a limiting block is also provided at a position of the second portion away from the first portion, and the first molding cavity has a limiting groove that matches the limiting block so that the limiting block can be engaged therein. The limiting block cooperates with the limiting block to prevent the second portion from rotating axially.

[0010] Furthermore, the valve cover also includes an inner tube that is fitted into the flow channel, and the first forming part also includes a third part that matches the inner tube.

[0011] Furthermore, the two second half molds together enclose a second cavity that extends vertically. The second mold core has a second forming part that matches the inner surface of the valve body and a second limiting part disposed at the end of the second forming part. The second cavity has a second forming cavity that matches the second forming part and a second limiting cavity that matches the second limiting part. When the second mold core is assembled in the second cavity, the second forming part cooperates with the second forming cavity to form the valve body. The outer wall of the second limiting part fits against the inner wall of the second limiting cavity to achieve a limiting effect.

[0012] Furthermore, the two third half molds together form a third cavity that extends vertically. The third mold core has a third molding part that matches the inner surface of the lower end cover and a third limiting part disposed at the lower end of the third molding part. The third cavity has a third molding cavity that matches the third molding part and a third limiting cavity that matches the third limiting part. When the third mold core is assembled in the third cavity, the third molding part cooperates with the third molding cavity to form the lower end cover. The outer wall of the third limiting part fits against the inner wall of the third limiting cavity to achieve a limiting effect.

[0013] Furthermore, fixing holes are provided between the two first half molds, between the two second half molds, and between the two third half molds. The fixing holes are used to connect and fix the corresponding two half molds. The fixing holes are configured in several different sizes to avoid misalignment when the two half molds are closed.

[0014] The valve production mold of this utility model has at least the following beneficial effects: It effectively solves the defects of the two mainstream methods in the existing valve body production—it avoids the problems of long cutting cycle, low material utilization rate and fast wear and high cost of special tools, and it also makes up for the shortcomings of sand casting, such as poor stability, uneven wall thickness and flow channel deformation, which require secondary correction; through the modular design of the first mold, the second mold and the third mold, and with the mold core with the "forming part + limiting part" structure in each mold, it can be specifically adapted to the different forming requirements of valve cover, valve body and lower end cover, avoiding the precision interference caused by multiple parts in one mold, directly ensuring the forming accuracy of key parts such as valve sealing chamber and high-precision connection interface, thereby improving the valve's sealing performance, pressure resistance and service life. Lifespan; meanwhile, optimized mold details significantly improve production convenience. Fixing holes of varying sizes between half-molds prevent misalignment during closing. The notch at the exposed end of the second section of the first mold facilitates demolding. The design of forming and reassembling the valve cover inner tube through an independent third section solves the problem of adapting complex structures. The reasonable layout of injection pipes in each mold (e.g., the injection pipe of the first mold extends to the flow channel and inner tube forming area, and the injection pipe of the second mold is set in the corresponding recess) ensures that the die-casting material fills every corner of the mold cavity, reducing defects such as material shortage and air bubbles, and ensuring the structural integrity of the finished product. The overall structure can accurately replicate the complex internal cavity shape of the valve, such as the irregular flow channel, and can meet the performance requirements of the valve as a core component of the fluid control system without subsequent processing, achieving simultaneous improvement in production efficiency, material utilization rate and finished product quality. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0016] Figure 1 This is a schematic diagram of the structure of the first mold in one embodiment of the valve production mold of this utility model. Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the structure of the first mold in one embodiment of the valve production mold of this utility model. Figure 2 ;

[0018] Figure 3 An exploded view of the structure of the first mold in one embodiment of the valve production mold of this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the second mold in one embodiment of the valve production mold of this utility model;

[0020] Figure 5 An exploded view of the structure of the second mold in one embodiment of the valve production mold of this utility model;

[0021] Figure 6 This is a schematic diagram of the structure of the third mold in one embodiment of the valve production mold of this utility model;

[0022] Figure 7 This is an exploded view of the structure of the third mold in one embodiment of the valve production mold of this utility model.

[0023] The meanings of the labels in the attached diagram are as follows:

[0024] First mold 1, first half mold 11, first mold core 12, first section 121, second section 122, third section 123, fourth section 124, notch 125, limiting block 126, first limiting part 127, first cavity 13, first molding cavity 131, first limiting cavity 132, limiting groove 133, first injection tube 14, first fixing hole 15;

[0025] Second mold 2, second half mold 21, second mold core 22, second molding part 221, second limiting part 222, second cavity 23, second molding cavity 231, second limiting cavity 232, recess 233, second injection tube 24, second fixing hole 25;

[0026] Third mold 3, third half mold 31, third mold core 32, fifth section 321, sixth section 322, third limiting section 323, third cavity 33, third molding cavity 331, third limiting cavity 332, third injection tube 34, third fixing hole 35;

[0027] Valve cover 41, cover body 411, flow channel 412, first vertical pipe 413, inner pipe 414, valve body 42, lower end cover 43, second vertical pipe 431. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] The following disclosure provides various embodiments or examples of different features for implementing this utility model. Specific examples of components and arrangements will be described below to simplify the utility model. Of course, these are merely examples and are not intended to limit the utility model. For example, in the following description, forming a first component above or on a second component may include embodiments where the first and second components are in direct contact, or embodiments where other components may be formed between the first and second components such that the first and second components are not in direct contact. Additionally, reference numerals and / or characters may be repeated in various instances of the utility model. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or configurations.

[0030] Furthermore, spatial relation terms such as "below," "under," "below," "above," and "above" may be used herein to readily describe the relationship between one element or component and another element (or component) or component (or component) as shown in the figure. In addition to the orientations shown in the figure, spatial relation terms will encompass various different orientations of the device in use or operation. The device may be positioned in other ways (rotated 90 degrees or in other orientations) and will be interpreted accordingly through the spatial relation descriptors used herein.

[0031] Furthermore, the technical parts described in this utility model and the appended claims are mainly the improved technical parts of this utility model, and do not limit the object protected by this utility model to only having these technical parts. Other known necessary components (structures and / or methods) and / or non-essential components of the protected object, other than the technical parts described in this utility model and the appended claims, are not included in this utility model and the appended claims because they do not involve the improvement scope of this utility model. However, this does not mean that the object protected by this utility model does not possess these known components.

[0032] The present invention will be further described below with reference to the accompanying drawings.

[0033] Please refer to Figure 1 , Figure 2 and Figure 3The valve production mold of this utility model includes a first mold 1, a second mold 2, and a third mold 3 for forming a valve cover 41, a valve body 42, and a lower end cover 43, respectively. To facilitate a clearer description of the first mold 1, the second mold 2, and the third mold 3, the structure of the valve is described first. In this embodiment, the valve cover 41 includes a cover body 411 and a flow channel 412 connected to and internally communicating with the cover body 411. The cover body 411 has an opening at its lower end and a first vertical pipe 413 communicating with the outside at its upper end. There are two flow channels 412, horizontally arranged on both sides of the cover body 411. Each flow channel 412 also has an inner tube 414 embedded within it. The valve body 42 is a hollow cylinder. The lower end cover 43 has an upward-facing opening and a second vertical pipe 431 communicating with the outside at its lower end.

[0034] The first mold 1 includes two first mold halves 11 and a first mold core 12 located between the two first mold halves 11. The two first mold halves 11 can be joined together and both first mold halves 11 have a first cavity 13 that extends vertically. When the first mold core 12 is located within the first cavity 13, the first cavity 13 and the first mold core 12 together form a first mold cavity for molding the valve cover 41. The two first mold halves 11 have a first injection pipe 14 that communicates with the first mold cavity.

[0035] The first mold core 12 has a first molding portion that matches the inner surface of the valve cover 41 and a first limiting portion 127 disposed at the lower end of the first molding portion. The first cavity 13 has a first molding cavity 131 that matches the first molding portion and a first limiting cavity 132 that matches the first limiting portion 127.

[0036] The first molding section includes a first portion 121 that matches the cover 411, a second portion 122 that matches the two flow channels 412, a third portion 123 that matches the inner tube 414, and a fourth portion 124 that matches the first vertical tube 413. The two second portions 122 exist independently of the first portion 121, and the first contact surface between the first portion 121 and the second portion 122, and the second contact surface between the second portion 122 and the first portion 121, match each other, so that the second portion 122 can fit tightly against the first portion 121 to facilitate the molding of the valve cover 41. The first molding cavity 131 extends outwards corresponding to the positions of the two second portions 122, so that the ends of the two second portions 122 away from the first portion 121 are exposed in the two first half-molds 11. A notch 125 is provided at the exposed end of each of the two portions in the first mold 1 to facilitate the application of force by the user during demolding. A limiting block 126 protrudes from the second portion 122 at a position away from the first portion 121. The first molding cavity 131 has a limiting groove 133 that matches the limiting block 126 so that the limiting block 126 can be engaged therein. The limiting block 126 and the limiting groove 133 cooperate to prevent the second portion 122 from rotating axially. In this embodiment, the notch 125 and the limiting block 126 are disposed on one of the second portions 122. In other embodiments, they may be disposed on the other second portion 122 or on both second portions 122. The two third portions 123 exist independently of the first portion 121 and the two second portions 122 to cooperate with the first cavity 13 to form two independent inner tubes 414. After molding, the inner tubes 414 are assembled with the cover 411. The first injection tube 14 extends from top to bottom into the two first half molds 11 and communicates with the first molding cavity 131 at the position corresponding to the cover 411. The first molding cavity 131 is also provided with a first injection tube 14 at the position corresponding to the two second portions 122. The first injection tube 14 extends downward to communicate with the first molding cavity 131 at the position corresponding to the third portion 123.

[0037] Both first mold halves 11 are provided with a first fixing hole 15, which is used to connect a first fixing bolt (not shown in the figure) to fix the two first mold halves 11 in a closed state. The first fixing hole 15 and the first fixing bolt can be screw holes and bolts, or they can be snap-fit ​​connectors, as long as they can fix the two first mold halves 11. The first fixing holes 15 are configured with several of different sizes to prevent misalignment when the two first mold halves 11 are closed. When the two first mold halves 11 are closed, the outer wall of the first limiting part 127 and the inner wall of the first limiting cavity 132 meet to limit the movement and form the first molding cavity 131 with the lower end closed. There is a gap between the first molding part and the first molding cavity 131 to fill material and form the valve cover 41. It should be noted that the two second portions 122 have a gap between the section of the first portion 121 and the first molding cavity 131 to form the flow channel 412, and the section of the two second portions 122 away from the first portion 121 fits against the inner wall of the first molding cavity 131 to limit the second portions 122.

[0038] Please refer to Figure 4 and Figure 5 The second mold 2 includes two second mold halves 21 and a second mold core 22 located between the two second mold halves 21. The two second mold halves 21 can be joined together and both second mold halves 21 have a second cavity 23 that extends vertically. When the second mold core 22 is located within the second cavity 23, the second cavity 23 and the second mold core 22 together form a second mold cavity for molding the valve body 42. The two second mold halves 21 have a second injection pipe 24 that communicates with the second mold cavity.

[0039] The second mold core 22 has a second molding portion 221 that matches the inner surface of the valve body 42 and a second limiting portion 222 connected to the second molding portion 221. The second cavity 23 has a second molding cavity 231 that matches the second molding portion 221 and a second limiting cavity 232 that matches the second limiting portion 222.

[0040] The second molding part 221 is cylindrical and matches the valve body 42. There are two second limiting parts 222, located at the upper and lower ends of the second molding part 221, respectively. The second limiting cavity 232 also has two corresponding second limiting parts 222, located at the upper and lower ends of the second molding cavity 231 and communicating with it. Since the mold making process involves first creating a wax model according to the product's shape, and then using the wax model to create a molding mold, and the wax model has a connecting part protruding from the product shape for connecting with an external support device (this mold processing method is a relatively mature existing technology, and all can utilize known principles, so this article will not elaborate on these known principles), the second molding cavity 231 has two recesses 233 corresponding to the connecting parts. The second injection tube 24 is positioned corresponding to the recesses 233, making it easier for material to fill the entire second mold cavity.

[0041] The two second half molds 21 are connected by a second fixing hole 25. The second fixing hole 25 has the same structure and function as the first fixing hole 15, so it will not be described in detail here. When the two second half molds 21 are closed, the outer walls of the two second limiting parts 222 respectively meet the inner walls of the two second limiting cavities 232 to provide a limiting function and form a second molding cavity 231 with its lower end closed. There is a gap between the second molding part 221 and the second molding cavity 231 to fill material and form the valve body 42. After the valve body 42 is formed, the two protrusions formed by the protrusions can be cut off.

[0042] Please refer to Figure 6 and Figure 7 The third mold 3 includes two third half molds 31 and a third mold core 32 located between the two third half molds 31. The two third half molds 31 can be joined together and both third half molds 31 share a third cavity 33. When the third mold core 32 is located within the third cavity 33, the third cavity 33 and the third mold core 32 together form a third mold cavity for molding the lower end cap 43. The two third half molds 31 share a third injection pipe 34 that communicates with the third mold cavity.

[0043] The third mold core 32 has a third molding portion that matches the inner surface of the lower end cover 43 and a third limiting portion 323 connected to the third molding portion. The third cavity 33 has a third molding cavity 331 that matches the third molding portion and a third limiting cavity 332 that matches the third limiting portion 323.

[0044] The third molding part includes a fifth portion 321 that matches the main body of the lower end cap 43 and a sixth portion 322 that matches the second vertical tube 431. The sixth portion 322 is integrally formed on the upper end of the fifth portion 321 to jointly form the third molding part. The third limiting portion 323 is disposed at the lower end of the third molding part. The third injection tube 34 extends from top to bottom into the interior of the two third half molds 31 and communicates with the third molding cavity 331.

[0045] Both third half-molds 31 are provided with a common through-hole 35. The third fixing hole 35 has the same structure and function as the first fixing hole 15 and the second fixing hole 25, so it will not be described in detail here. When the two third half-molds 31 are closed, the outer wall of the third limiting part 323 fits against the inner peripheral wall of the third limiting cavity 332 to play a limiting role and cooperate to form the lower closed third molding cavity 331. There is a gap between the third molding part and the third molding cavity 331 to fill material and form the lower end cap 43.

[0046] Compared with existing technologies, the valve production mold of this utility model effectively solves the defects of the two mainstream methods in the production of valve bodies. It avoids the problems of long cutting cycle, low material utilization, fast wear and high cost of special tools, and the shortcomings of sand casting, such as poor stability, uneven wall thickness, and flow channel deformation, which require secondary correction. Through the modular design of the first mold, second mold, and third mold, and the mold core with the "forming part + limiting part" structure in each mold, it can be specifically adapted to the different forming requirements of valve cover, valve body, and lower end cover. It avoids the precision interference caused by multiple parts in one mold, and directly ensures the forming accuracy of key parts such as valve sealing chamber and high-precision connection interface, thereby improving the valve's sealing performance, pressure resistance, and service life. Meanwhile, the optimized mold details significantly improve production convenience. The varying sizes of fixing holes between the half-molds prevent misalignment during closing. The notch at the exposed end of the second section of the first mold facilitates demolding. The design of forming and reassembling the valve cover inner tube through an independent third section solves the problem of adapting to complex structures. The reasonable layout of the injection tubes in each mold (e.g., the injection tube of the first mold extends to the flow channel and inner tube forming area, and the injection tube of the second mold is set in the corresponding recess) ensures that the die-casting material fills every corner of the mold cavity, reducing defects such as material shortage and air bubbles, and ensuring the structural integrity of the finished product. The overall structure can accurately replicate the complex internal cavity shape of the valve, such as the irregular flow channel, and can meet the performance requirements of the valve as a core component of the fluid control system without subsequent processing, achieving simultaneous improvement in production efficiency, material utilization, and finished product quality.

[0047] The above embodiments only illustrate preferred implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A valve manufacturing mold, characterized in that: The system includes a first mold, a second mold, and a third mold for respectively molding a valve cover, a valve body, and a lower end cap. The first mold includes two first half-molds and a first mold core located between the two first half-molds. The two first half-molds and the first mold core together form a first mold cavity for molding the valve cover. A first injection tube communicating with the first mold cavity is provided on both first half-molds. The second mold includes two second half-molds and a second mold core located between the two second half-molds. The two second half-molds and the second mold core together form a second mold cavity for molding the valve body. A second injection tube communicating with the second mold cavity is provided on both second half-molds. The third mold includes two third half-molds and a third mold core located between the two third half-molds. The two third half-molds and the third mold core together form a third mold cavity for molding the lower end cap. A third injection tube communicating with the third mold cavity is provided on both third half-molds.

2. The valve production mold as described in claim 1, characterized in that: The first mold core, the second mold core, and the third mold core each include a molding portion that matches the inner surface of the valve cover, the valve body, and the lower end cover, and also include a limiting portion connected to the molding portion, the limiting portion being used to limit the molding portion within the first half mold, the second half mold, and the third half mold.

3. The valve production mold as described in claim 2, characterized in that: The two first half molds together form a first cavity that runs vertically through each other. The first mold core has a first molding part that matches the inner surface of the valve cover and a first limiting part disposed at the lower end of the first molding part. The first cavity has a first molding cavity that matches the first molding part and a first limiting cavity that matches the first limiting part. When the first mold core is assembled in the first cavity, the first molding part cooperates with the first molding cavity to form the valve cover. The outer wall of the first limiting part fits against the inner wall of the first limiting cavity to achieve a limiting effect.

4. The valve production mold as described in claim 3, characterized in that: The valve cover includes a cover body and a flow channel connected to and internally communicating with the cover body. The first molding part includes a first portion that matches the cover body and a second portion that matches the flow channel. The second portion and the first portion are spliced ​​together by the limiting action of the first molding cavity.

5. The valve production mold as described in claim 4, characterized in that: The first molding cavity extends outward from the position corresponding to the second part so that the end of the second part is exposed outside the first mold. The end of the second part exposed outside the first mold has a notch so that the user can apply force there when demolding.

6. The valve production mold as described in claim 5, characterized in that: The second portion is further provided with a limiting block at a position away from the first portion. The first molding cavity has a limiting groove that matches the limiting block so that the limiting block can be engaged therein. The limiting block cooperates with the limiting block to prevent the second portion from rotating axially.

7. The valve production mold as described in claim 4, characterized in that: The valve cover also includes an inner tube that is fitted into the flow channel, and the first forming part also includes a third part that matches the inner tube.

8. The valve production mold as described in claim 2, characterized in that: The two second half molds together form a second cavity that runs vertically through each other. The second mold core has a second forming part that matches the inner surface of the valve body and a second limiting part disposed at the end of the second forming part. The second cavity has a second forming cavity that matches the second forming part and a second limiting cavity that matches the second limiting part. When the second mold core is assembled in the second cavity, the second forming part cooperates with the second forming cavity to form the valve body. The outer wall of the second limiting part fits against the inner wall of the second limiting cavity to achieve a limiting effect.

9. The valve production mold as described in claim 2, characterized in that: The two third half molds together form a third cavity that extends vertically. The third mold core has a third molding part that matches the inner surface of the lower end cover and a third limiting part disposed at the lower end of the third molding part. The third cavity has a third molding cavity that matches the third molding part and a third limiting cavity that matches the third limiting part. When the third mold core is assembled in the third cavity, the third molding part cooperates with the third molding cavity to form the lower end cover. The outer wall of the third limiting part fits against the inner wall of the third limiting cavity to achieve a limiting effect.

10. The valve production mold according to any one of claims 1 to 9, characterized in that: Fixing holes are provided between the two first half molds, between the two second half molds, and between the two third half molds. The fixing holes are used to connect and fix the corresponding two half molds. The fixing holes are configured in several different sizes to avoid misalignment when the two half molds are closed.

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