Casting mold for emergency cut-off valve body

Abstract

The utility model provides a casting mold for an emergency cut-off valve body, which belongs to the technical field of molds and comprises a bottom mold, a front mold, a rear mold and a top mold which are closed to form two symmetrically arranged mold cavities, a main pouring gate is arranged between the two mold cavities, and the main pouring gate is communicated with the bottom mold. An upper sub-pouring gate and a lower sub-pouring gate are arranged on the main pouring gate at intervals up and down towards each mold cavity, each mold cavity is provided with a core-pulling block and a sand core block, the core-pulling block pulls a core upwards, and the bottom mold is provided with a first positioning groove for positioning the sand core block. Two parts can be produced at the same time, the production efficiency is improved, and the production period is shortened. And secondly, a complex inner cavity structure can be better formed, the precision and consistency of a casting are improved, the first positioning groove formed in the bottom die can ensure accurate positioning of the sand core block, and therefore deviation is reduced. In addition, the use of materials is optimized, the waste of molding sand is reduced, the yield of the process is further improved, and the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a mould technical field, concretely relates to a casting mould of emergency cut -off valve body. BACKGROUND

[0002] Casting mould is a key tool for shaping metal and non-metallic materials in industrial production, widely used in automobile, aviation, electronics and other fields. By injecting molten material into the mold cavity and cooling and solidifying, the mold can accurately manufacture complex parts. Modern casting moulds use high-quality alloy materials and advanced manufacturing technologies, such as numerical control machining and 3D printing, to ensure high precision and high durability. The application of surface treatment technology further improves the service life of the mould and the quality of the product. The innovation and development of casting moulds provide important support for efficient production and product innovation in various industries.

[0003] Emergency cut-off valve body is a device applied to special operation tank truck to control tank pressure and ensure tank safety, which plays a key role in the safety of tank truck. As a thin-walled pressure-resistant part, emergency cut-off valve body needs to have high compactness and excellent mechanical properties. In addition, the safety cut-off groove designed on it not only needs to have good pressure resistance, but also must be able to quickly disconnect when the pressure reaches the set value in an emergency. However, the traditional casting process usually adopts single-piece casting, which not only leads to serious waste of sand, but also has low process yield and high casting cost, ultimately resulting in poor compactness of the obtained casting. SUMMARY

[0004] The utility model aims at overcoming the shortcomings and deficiencies of prior art, and provides a kind of casting mould of emergency cut-off valve body.

[0005] The technical scheme adopted by the utility model is as follows: the application provides a kind of casting mould of emergency cut-off valve body, including bottom die, front die, back die and top die, and the four are combined to form two symmetrical setting mold cavities, the middle of two mold cavities is provided with main runner, the main runner is upwardly spaced apart with upper sub-runner and lower sub-runner towards each mold cavity, each mold cavity is provided with core-pulling block and sand core block, the core-pulling block is pulled upwards, the bottom die is provided with the first positioning groove for positioning sand core block.

[0006] In some embodiments, the sand core block includes a bottom positioning end and a side positioning end, the first positioning groove is adapted to the bottom positioning end and positions it, and the side of the mold cavity away from the main runner is provided with a positioning channel for the side positioning end to pass through and adapt to, and the positioning channel is formed by the first groove provided in the front die and the second groove provided in the back die.

[0007] In some embodiments, the outer end of the positioning channel is provided with a second positioning groove formed by a third groove provided on the front mold and a fourth groove provided on the rear mold, and a positioning block is provided on the bottom mold corresponding to the second positioning groove, and the positioning block abuts between the third groove and the fourth groove after the front mold and the rear mold are closed.

[0008] In some embodiments, a third positioning groove is provided on the positioning block corresponding to the side positioning end.

[0009] In some embodiments, a guide rail is provided on the bottom mold along the opening and closing direction of the front mold and the rear mold, and a sliding groove corresponding to the guide rail is provided on the front mold and the rear mold.

[0010] In some embodiments, a gate corresponding to the main gate is provided on the bottom mold, and the bottom wall of the lower sub-gate is inclined downwardly towards the gate.

[0011] In some embodiments, the core pulling block and the sand core block are provided with a butt joint groove on one side and a butt joint block on the other side, and the butt joint block is inserted into the butt joint groove to form a closed cavity therebetween.

[0012] In some embodiments, a first limiting plate is provided on the outer side of the front mold along the opening and closing direction of the front mold and the rear mold, and a second limiting plate is provided on the outer side of the rear mold.

[0013] In some embodiments, the core pulling block is completed when the top mold is separated.

[0014] In some embodiments, the core pulling block is slid up and down on the top mold.

[0015] The beneficial effects of the present utility model are as follows: the present utility model can produce two parts at the same time, improve production efficiency, and reduce production cycle. Secondly, it can better form a complex internal cavity structure, increase the precision and consistency of the casting, and the first positioning groove provided on the bottom mold can ensure the accurate positioning of the sand core block, thereby reducing deviation and improving the dimensional accuracy of the casting. In addition, the use of materials is optimized, the waste of molding sand is reduced, thereby improving the yield of the process and reducing the production cost. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present utility model, and for those skilled in the art, other drawings obtained according to these drawings without creative labor still belong to the scope of the present utility model.

[0017] Figure 1The utility model discloses a kind of casting mould of emergency cut-off valve body Figure 1 .

[0018] Figure 2 The utility model discloses a kind of casting mould of emergency cut-off valve body Figure 1 .

[0019] Figure 3 The utility model discloses a kind of casting mould of emergency cut-off valve body Figure 2 .

[0020] Figure 4 It is the schematic drawing of front mould and back mould in the utility model;

[0021] Figure 5 It is the schematic drawing of positioning block, front mould and back mould in the utility model;

[0022] Figure 6 It is the schematic drawing of bottom mould, front mould and back mould in the utility model;

[0023] Figure 7 The utility model discloses a kind of casting mould of emergency cut-off valve body Figure 2 .

[0024] Figure 8 It is the partial structure explosion drawing of a kind of casting mould of emergency cut-off valve body in the utility model;

[0025] Figure 9 It is the schematic drawing of emergency cut-off valve body in the utility model. DETAILED DESCRIPTION

[0026] The following description provides specific application scenarios and requirements of the present specification, so that those skilled in the art can manufacture and use the contents of the present specification. Various local modifications of the disclosed embodiments are obvious to those skilled in the art, and the general principles defined herein can be applied to other embodiments and applications without departing from the spirit and scope of the present specification. Therefore, the present specification is not limited to the shown embodiments, but is consistent with the widest scope of the claims.

[0027] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "radial", "length", "width", "thickness", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer" is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0028] Secondly, the terms "first", "second" and similar words do not represent any order, quantity or importance, but are only used to distinguish different components and should not be understood as limiting the embodiments of the present application.

[0029] In addition, the terms "mounting", "setting", "provided with", "connection", "connected" should be broadly understood. For example, it can be fixed connection, detachable connection, or integral structure; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate media, or internal communication between two devices, elements or components.

[0030] For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] Regarding the drawings of the present application, it should be clearly understood that the drawings are only for illustrative and descriptive purposes, and are not intended to limit the scope of the present application. It should also be understood that the drawings are not drawn to scale.

[0032] Figure 9 A schematic view of an emergency shut-off valve body, at present, the traditional casting mold is usually single-piece casting, which easily leads to serious waste of sand, low process yield, high casting cost, and poor compactness of the final casting.

[0033] Based on the above problems, as shown in Figures 1 to 8 The present specification provides a casting mold for an emergency shut-off valve body, which includes a bottom mold 1, a front mold 2, a rear mold 3, and a top mold 4, and the four molds form two symmetrical mold cavities 5, which can realize simultaneous production of two parts, improve production efficiency, and reduce production cycle.

[0034] Due to the position of the cut-off groove, the upper and lower ends of the emergency shut-off valve are separated by the cut-off groove, causing large isolated hot spot areas at the upper and lower ends. Therefore, during the casting process, loose defects are prone to occur. Therefore, a main runner 6 is arranged in the middle of each of the two mold cavities 5, and the main runner 6 is arranged with an upper sub-runner 7 and a lower sub-runner 8 above and below each mold cavity 5, which can more evenly distribute molten metal, ensure that the mold cavity is full, and help to improve the compactness and quality of the casting.

[0035] Secondly, each of the mold cavities 5 is provided with a core pulling block 9 and a sand core block 10, the core pulling block 9 pulls the core upward, and the bottom mold 1 is provided with a first positioning groove 11 for positioning the sand core block 10, which can better form a complex internal cavity structure, increase the precision and consistency of the casting, and the first positioning groove 11 arranged on the bottom mold 1 can ensure the accurate positioning of the sand core block 10, thereby reducing the deviation and improving the dimensional accuracy of the casting.

[0036] In addition, compared with the traditional general sand core block, the inner cavity of the upper part of the emergency shut-off valve in the present application is neat, so that the core pulling is performed, which can improve the precision of the casting compared with the sand core block, and the inner cavity of the lower part of the emergency shut-off valve is complex, so the sand core block is also needed. In this way, the use of materials is optimized, the waste of sand is reduced, the yield of the process is improved, and the production cost is reduced.

[0037] It should be understood that the sand core block 10 is manufactured in advance according to the shape of the inner cavity of the lower part of the emergency shut-off valve, and when the casting of the emergency shut-off valve is completed, the sand core block is placed on the sand shaking table to be shaken and poured out.

[0038] In some embodiments, the sand core block 10 includes a bottom positioning end 100 and a side positioning end 101, the first positioning groove 11 is matched with and positioned by the bottom positioning end 100, and the side positioning end 101 is provided with a positioning channel 12 passing through and matched with the side positioning end 101 on the side of the mold cavity 5 away from the main sprue 6. The positioning channel 12 is formed by the first groove 200 provided on the front mold 2 and the second groove 300 provided on the rear mold 3. In this way, the double positioning design of the bottom positioning end 100 and the side positioning end 101 provides better stability to prevent the sand core block 10 from moving or deforming during casting.

[0039] Further, the outer end of the positioning channel 12 is provided with a second positioning groove 13, and the second positioning groove 13 is formed by the third groove 201 provided on the front mold 2 and the fourth groove 301 provided on the rear mold 3. The bottom mold 1 is provided with a positioning block 14 corresponding to the second positioning groove 13. After the front mold 2 and the rear mold 3 are closed, the positioning block 14 abuts between the third groove 201 and the fourth groove 301, which not only ensures the accuracy of the closing position of the front mold 2 and the rear mold 3, but also avoids displacement of the front mold 2 and the rear mold 3 on the left and right sides during high-pressure casting.

[0040] Further, the positioning block 14 is provided with a third positioning groove 140 matched with the side positioning end 101, which can further improve the positioning accuracy of the sand core block 10 in the mold cavity 5.

[0041] In some embodiments, as shown in Figure 6 The bottom mold 1 is provided with a guide rail 15 along the opening and closing direction of the front mold 2 and the rear mold 3, and the front mold 2 and the rear mold 3 are provided with a sliding groove 16 matched with the guide rail 15, which ensures that the front mold 2 and the rear mold 3 always remain on the correct track during opening and closing, avoids deviation, improves opening and closing accuracy, provides additional support and positioning, and enhances the structural stability of the mold as a whole, especially during high-pressure casting.

[0042] In some embodiments, the bottom mold 1 is provided with a sprue 17 matched with the main sprue 6, and the bottom wall of the lower sub-sprue 8 is inclined downward toward the direction of the sprue 17, which helps the backflow of the molten metal and reduces the loss of the molten metal, thereby improving the utilization rate of the material.

[0043] In some embodiments, the core-pulling block 9 and the sand core block 10 are provided with a butt joint groove 18 and a butt joint block 19, respectively, and the butt joint block 19 is inserted into the butt joint groove 18 to form a sealed cavity 20 therebetween, as shown in Figure 3 The combination of the butt joint block 19 and the butt joint groove 18 can ensure the accurate positioning of the core-pulling block 9 and the sand core block 10 during assembly, reduce the possibility of mispositioning, and improve the precision of the casting. In addition, the provision of the sealed cavity 20 is conducive to the separation of the core-pulling block 9 and the sand core block 10 after casting under high temperature and high pressure.

[0044] In some embodiments, the first limiting plate 21 is arranged on the outer side of the front mold 2 in the opening and closing direction of the front mold 2 and the rear mold 3, and the second limiting plate 22 is arranged on the outer side of the rear mold 3, which can prevent the mold from accidentally exceeding the set range during operation, improve the safety of the operation process, and reduce the risk of accidents.

[0045] Optionally, the core-pulling block 9 is separated from the top mold 4 to complete the core pulling, which simplifies the entire mold operation process and reduces the need for separate steps. Of course, the core-pulling block 9 is arranged to slide up and down on the top mold 4, and the former structure is usually preferred.

[0046] It should be understood that other structures of the mold, such as the core-pulling, the driving mechanism for opening and closing the mold, and the cooling channel, can be reasonably arranged by those skilled in the art, and will not be described in detail in the present specification.

[0047] In summary, after reading the detailed disclosure, those skilled in the art can understand that the foregoing detailed disclosure can be presented only in an exemplary manner and can not be limiting. Although it is not explicitly stated here, those skilled in the art can understand that the present application requires to encompass various reasonable changes, improvements and modifications to the embodiments. These changes, improvements and modifications are intended to be proposed by the present application and are within the spirit and scope of the exemplary embodiments of the present application.

[0048] Furthermore, it is to be understood that the application can be carried out by specifically advantageous embodiments, of which the following gives an illustration. In the preceding description of embodiments of the application, for purposes of simplicity, the application has combined in a single embodiment various features in order to aid in understanding one feature. None of these combinations, however, is necessary, and one skilled in the art will be able to find variations of one feature that will work with the other features when the application is read with common knowledge in mind. That is, the embodiments of the application can also be understood as integrations of multiple sub-embodiments, each of which is valid when less than all of the features of a single previously disclosed embodiment.

[0049] Finally, it is to be understood that the embodiments of the application disclosed herein are illustrative of the principles of the present application. Other modifications that are obvious to those skilled in the art are intended to be within the scope of the application. The application described herein is therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims

1. A casting mold for an emergency shut-off valve body, characterized by, The application relates to a mold, which comprises a bottom mold (1), a front mold (2), a rear mold (3) and a top mold (4), and the four molds are combined to form two symmetrical mold cavities (5), a main runner (6) is arranged in the middle of the two mold cavities (5), an upper sub-runner (7) and a lower sub-runner (8) are arranged above and below the main runner (6) towards each mold cavity (5), each mold cavity (5) is provided with a core-pulling block (9) and a sand core block (10), the core-pulling block (9) is pulled upwards, and the bottom mold (1) is provided with a first positioning groove (11) for positioning the sand core block (10).

2. The casting mold for an emergency shut-off valve body according to claim 1, characterized in that, The sand core block (10) comprises a bottom positioning end (100) and a side positioning end (101), the first positioning groove (11) is matched with and positions the bottom positioning end (100), and the side of the mold cavity (5) away from the main runner (6) is provided with a positioning channel (12) for the side positioning end (101) to pass through and match with, the positioning channel (12) is formed by a first groove (200) arranged on the front mold (2) and a second groove (300) arranged on the rear mold (3).

3. An emergency shut-off valve body casting mold according to claim 2, wherein An outer end of the positioning channel (12) is provided with a second positioning groove (13), the second positioning groove (13) is formed by a third groove (201) arranged on the front mold (2) and a fourth groove (301) arranged on the rear mold (3), and a positioning block (14) corresponding to the second positioning groove (13) is arranged on the bottom mold (1), and the positioning block (14) abuts between the third groove (201) and the fourth groove (301) after the front mold (2) and the rear mold (3) are combined.

4. An emergency shut-off valve body casting mold according to claim 3, wherein A third positioning groove (140) matched with the side positioning end (101) is arranged on the positioning block (14).

5. The casting mold for an emergency shut-off valve body of claim 1, wherein, A guide rail (15) is arranged on the bottom mold (1) along the opening and closing directions of the front mold (2) and the rear mold (3), and a sliding groove (16) matched with the guide rail (15) is arranged on the front mold (2) and the rear mold (3).

6. The casting mold for an emergency shut-off valve body of claim 1, wherein, A sprue (17) matched with the main runner (6) is arranged on the bottom mold (1), and the bottom wall of the lower sub-runner (8) is downwardly inclined towards the direction of the sprue (17).

7. The casting mold for an emergency shut-off valve body of claim 1, wherein, The core-pulling block (9) and the sand core block (10) are provided with a butt joint groove (18) and a butt joint block (19) respectively, and a closed cavity (20) is formed between the butt joint block (19) and the butt joint groove (18).

8. The casting mold for an emergency shut-off valve body of claim 1, wherein, First and second limiting plates (21) and (22) are arranged on the outer sides of the front mold (2) and the rear mold (3) along the opening and closing directions of the front mold (2) and the rear mold (3).

9. The casting mold for an emergency shut-off valve body of claim 1, wherein, The core-pulling block (9) is pulled out when the top mold (4) is opened.

10. The casting mold for an emergency shut-off valve body of claim 1, wherein, The core-pulling block (9) is arranged on the top mold (4) and can slide up and down.

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