Casting mold for water meter shell production
By using mirrored front and rear molds, sealing and skeleton mechanisms, the problems of sand core misalignment and molding sand loss in water meter casing casting molds were solved, achieving efficient casting and low-cost production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- TAIXING CITY CHUNLEI INSTR CO LTD
- Filing Date
- 2026-04-20
- Publication Date
- 2026-05-15
AI Technical Summary
In existing water meter casing casting molds, the sand core is prone to shifting or floating, the bonding strength between the molding sand and the skeleton is low, the surface molding sand is prone to falling off during pouring, and gas is difficult to expel, resulting in sand inclusion defects and porosity in the castings, low production efficiency and high material consumption.
The front and rear molds are set up in a mirror image, combined with a sealing mechanism and a skeleton mechanism. The sealing mechanism achieves multi-point locking through fastening sleeves, upper and lower sealing frames and sealing grooves. The skeleton mechanism forms an inverted "T" shaped skeleton through horizontal and vertical arms, with vent holes for exhaust and a crushing mechanism to assist in the release of molding sand.
It improves the mold's closing accuracy and sealing performance, prevents molten metal leakage, ensures the consistency and safety of casting dimensions, reduces material costs, improves sand removal efficiency and production efficiency, and avoids porosity defects.
Smart Images
Figure CN122033183A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of casting molds, and in particular to a casting mold for producing water meter housings. Background Technology
[0002] Water meter housings are mostly cast using sand casting or metal mold gravity casting processes. Common casting molds typically consist of an upper mold, a lower mold, and a sand core inside. The sand core is positioned by the cooperation of the core head and the core seat. The gating system usually adopts top pouring or side pouring methods. The mold parting surface is closed by a simple mold locking mechanism.
[0003] However, in existing molds, the sand core is only positioned by the core head, which is prone to displacement or floating under the impact of molten metal, resulting in uneven casting wall thickness. Furthermore, the bonding strength between the molding sand and the skeleton is low, and the surface molding sand is easily washed away during pouring, causing sand inclusion defects in the casting. It is also difficult for the gas inside the sand core to be discharged, which may produce pores in the inner cavity of the casting. After pouring, it is difficult to clean the sand core, the skeleton cannot be reused, and the material consumption is high and the production efficiency is low. Summary of the Invention
[0004] The purpose of this application is to provide a casting mold for the production of water meter housings to solve the problems in the prior art.
[0005] The casting mold for producing water meter housings provided in this application adopts the following technical solution: it includes a front mold, a rear mold is provided at the rear end of the front mold, the front mold and the rear mold are connected by a sealing mechanism, and a skeleton mechanism is provided between the front mold and the rear mold; The front mold and the rear mold are mirror images of each other and have the same components. The front end of the rear mold is provided with a groove, and the rear end of the groove is provided with no less than two sets of pouring ports. The left and right sides and the top center of the rear mold are provided with through-holes that connect to the groove. A set of fasteners is provided on the outside of each through-hole. The front end of the rear mold is provided with an extension plate, and the outer side of the front end face of the rear mold is provided with a guide. By adopting the above technical solution, the front mold and the rear mold are mirror images with identical components and are connected by a sealing mechanism. After the mold is closed, the groove forms a cavity that matches the shape of the shell. The pouring port at the rear end of the groove can achieve smooth filling from both sides and the bottom. The through-hole provides an extension and positioning channel for the skeleton mechanism. Fasteners enable subsequent sealing and locking. The extension plate provides an installation base for the sealing mechanism. The guide can ensure the guiding accuracy when the front mold and the rear mold are closed. This constructs the basic framework of the mold, realizes the functions of mold closing positioning, pouring guidance and skeleton positioning, and provides an integrated foundation.
[0006] Preferably, the sealing mechanism includes a fastening sleeve, an upper sealing frame, a covering sleeve, a lower sealing frame, a sealing groove, and fixing holes. The fasteners are all provided with fastening sleeves on their outer sides. The upper sealing frame is provided on the outer side of the upper extension plate, and the upper sealing frame is provided with a covering sleeve corresponding to the fastening sleeve in the middle. The lower sealing frame is provided on the outer side of the lower extension plate. The inner ends of the upper and lower sealing frames are provided with sealing grooves. The front ends of the upper and lower sealing frames are provided with at least two sets of fixing holes.
[0007] By adopting the above technical solution, the fastening sleeve and fastener are locked together, the upper sealing frame and the lower sealing frame are respectively installed on the outside of the extension plates at the upper and lower ends, the cover sleeve can achieve integrated coverage of the top fastening sleeve, the sealing groove can accommodate the extension plate, improve the mold sealing performance of the front mold and the rear mold, the fixing hole enhances the reinforcement effect, realizes multi-point locking and full sealing after mold closing, effectively prevents molten metal leakage during pouring, and improves the safety and stability of the pouring process.
[0008] Preferably, the skeleton mechanism includes a horizontal arm, a crushing mechanism, a vertical arm, molding sand, and a flange. The horizontal arm is arranged laterally at the bottom end of the groove. A connecting seat is provided at the middle end of the horizontal arm. An internal thread groove is provided at the middle end of the connecting seat, and the vertical arm is connected through the internal thread groove. The crushing mechanism is connected to the bottom end of the vertical arm. The outer ends of both the horizontal arm and the vertical arm are covered with molding sand. A flange is provided on the outer side of the horizontal arm and the vertical arm corresponding to the coverage area of the molding sand. At least two sets of vent holes are provided on the outer side of both the horizontal arm and the vertical arm. The other end of each vent hole passes through the horizontal arm and the vertical arm and communicates with the outside air.
[0009] By adopting the above technical solution, the horizontal arm is detachably connected to the vertical arm through the internal thread groove in the connecting seat to form an inverted "T" shaped skeleton. The crushing mechanism on the outside of the vertical arm can assist in crushing the molding sand during demolding. The molding sand wraps around the outer ends of the horizontal and vertical arms to construct the internal cavity of the water meter housing. The flange enhances the stability and firmness of the molding sand wrapping. The vent hole connects to the outside air to exhaust air and prevent air bubbles from forming in the water meter housing.
[0010] Preferably, the crushing mechanism includes a fixed outer cover, a first crushing ring, an inner cavity, an inner wall cavity, a movable cylinder, a second crushing ring, a connecting groove, a connecting shaft, and an inner top ring. A set of fixed outer covers is provided at the bottom outer end of the longitudinal arm. A set of first crushing rings is connected to the bottom outer end of the fixed outer cover. An inner cavity is provided at the inner end of the fixed outer cover. An inner wall cavity is opened in the inner wall of the fixed outer cover. A set of movable cylinders is connected in the inner wall cavity. The bottom end of the movable cylinder extends through to the bottom end of the fixed outer cover and is connected to a set of second crushing rings. The inner side of the inner wall cavity is connected to the inner cavity through at least two sets of connecting grooves. At least two sets of connecting shafts are provided at equal intervals at the top end of the inner side of the movable cylinder. The other end of each connecting shaft extends through the connecting groove into the inner cavity and is connected to a set of inner top rings.
[0011] By adopting the above technical solution, when the fixed outer cover rotates, it can drive the first crushing ring to rotate synchronously to crush the molding sand. The moving cylinder can rotate and move up and down along the inner wall cavity, driving the second crushing ring to move synchronously. This, together with the first crushing ring, improves the crushing effect on the molding sand. After pouring and cooling, the molding sand can be crushed efficiently, causing it to fall off the horizontal and vertical arms, facilitating subsequent separation and core extraction. The sand cleaning operation is also simple.
[0012] Preferably, the bottom end of the longitudinal arm is provided with a screw with a corresponding internal thread groove.
[0013] By adopting the above technical solution, the longitudinal arm can be threadedly connected to the transverse arm through a screw, which is reliable and detachable. After casting, the longitudinal arm and transverse arm can be separated and extracted from the casting respectively, which can be reused and reduce material costs.
[0014] Preferably, the molding sand has a wrapping layer on its outer side.
[0015] By adopting the above technical solution, the coating layer can act as a barrier during casting to prevent the surface molding sand from falling off, improve the integrity of the molding sand, and ensure the integrity and consistency of the internal cavity space of the water meter shell.
[0016] Preferably, the coating layer is a ceramic fiber mesh.
[0017] By adopting the above technical solution, the ceramic fiber mesh does not melt during the casting process and does not stick to the casting. At the same time, it can be broken off along with the molding sand during the sand cleaning process without additional treatment.
[0018] Preferably, the left and right ends of the horizontal arm and the top of the vertical arm all extend to the outside of the front mold and the rear mold through openings.
[0019] By adopting the above technical solution, the left and right ends of the horizontal arm and the top of the vertical arm are exposed outside the mold. After pouring, the horizontal arm and the vertical arm can be subjected to force from the outside by vibration or knocking, which makes it easier to shake off the molding sand and separate the horizontal arm and the vertical arm, improving the convenience of operation and improving the sand cleaning efficiency.
[0020] Preferably, the flange has a spiral structure.
[0021] By adopting the above technical solution, the spiral structure flange can significantly increase the contact area and mechanical interlocking force between the molding sand and the horizontal and vertical arms, improve the connection stability between the molding sand and the horizontal and vertical arms, and prevent peeling. At the same time, the spiral structure also helps to break the molding sand during sand removal, taking into account both anchoring strength and sand removal convenience.
[0022] Preferably, the outer side of the fastener is provided with external threads, and the inner side of the fastening sleeve is provided with corresponding internal threads.
[0023] By adopting the above technical solution, the fastener and the fastening sleeve are locked by threaded engagement. After the mold is closed, the front mold and the rear mold can be firmly locked by tightening the fastening sleeve, which improves the connection sealing, prevents molten metal leakage, ensures the safety of the pouring process and the dimensional accuracy of the casting, and makes the connection reliable and easy to disassemble and assemble.
[0024] In summary, this application includes at least one of the following beneficial technical effects of casting molds for water meter housing production: 1. This application achieves precise guidance and multi-point locking during mold closing by using guides and extension plates set on the front and rear molds, as well as sealing mechanisms on the outside of the front and rear molds. The sealing mechanisms include components such as fastening sleeves, upper sealing frames, cover sleeves, lower sealing frames, sealing grooves, and fixing holes. The guide plates and guide grooves of the guides cooperate to ensure mold closing accuracy. The upper and lower sealing frames accommodate the extension plates through the sealing grooves. The fastening sleeves and fasteners are threaded and locked to form a complete seal, which can effectively prevent molten metal from leaking from the parting surface during pouring, improve the connection stability and mold closing accuracy of the mold, and ensure the consistency of casting dimensions and the safety of the pouring process. 2. This application utilizes a skeleton mechanism located between the front and rear molds. The skeleton mechanism includes components such as horizontal arms, a crushing mechanism, vertical arms, molding sand, flanges, and vent holes. The horizontal and vertical arms are detachably connected by the crushing mechanism to form an inverted "T" shaped skeleton. The crushing mechanism covers and protects the connection point between the horizontal and vertical arms and improves the crushing effect on the molding sand during disassembly, facilitating the recovery of the horizontal and vertical arms. The outer sides of the horizontal and vertical arms are provided with spiral flanges, and the molding sand is also wrapped with a ceramic fiber material coating layer. The inverted "T" shaped skeleton achieves stable positioning of the sand core within the mold cavity. The spiral flanges significantly enhance the interlocking force between the molding sand and the skeleton. The coating layer acts as a barrier during casting to prevent the molding sand from being washed away, significantly improving the integrity and erosion resistance of the sand core. The vent holes form ventilation channels to promptly discharge the gas generated by the heating of the molding sand, preventing porosity in the casting and ensuring the molding quality of the inner cavity of the water meter casing. 3. This application utilizes a crushing mechanism located at the bottom outer end of the longitudinal arm. The crushing mechanism includes components such as a fixed outer cover, a first crushing ring, an inner cavity, an inner wall cavity, a moving cylinder, a second crushing ring, a connecting groove, a connecting shaft, and an inner top ring. These components work together to achieve efficient crushing of the cast molding sand and convenient separation of the skeleton. The first and second crushing rings in the crushing mechanism perform two-stage crushing of the molding sand when the longitudinal arm rotates out. At the same time, vibration or impact force can be applied to the ends of the horizontal and longitudinal arms that extend to the outer sides of the front and rear molds, making the sand cleaning operation faster and more effective. Furthermore, the skeleton can be reused, significantly reducing material costs and production cycle. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the overall structure of this application; Figure 2This is a schematic diagram of the internal structure of this application; Figure 3 This is a schematic diagram of the internal structure of the rear mold in this application; Figure 4 yes Figure 3 Enlarged structural diagram at point A in the middle; Figure 5 This is a schematic diagram of the sealing mechanism structure of this application; Figure 6 This is a schematic diagram of the connection structure between the horizontal and vertical arms of this application; Figure 7 This is a schematic diagram of the internal structure of the crushing mechanism in this application; Figure 8 yes Figure 7 Enlarged structural diagram at point B; Figure 9 This is a schematic diagram of a partial structure of the molding sand in this application.
[0026] Explanation of reference numerals in the attached drawings: 1. Front mold; 2. Rear mold; 3. Sealing mechanism; 4. Skeleton mechanism; 21. Groove; 22. Pour port; 23. Through port; 24. Fastener; 25. Extension plate; 26. Guide; 31. Fastening sleeve; 32. Upper sealing frame; 33. Covering sleeve; 34. Lower sealing frame; 35. Sealing groove; 36. Fixing hole; 41. Horizontal arm; 42. Crushing mechanism; 43. Longitudinal arm; 44. Molding sand; 45. Flange; 46. Vent hole; 411. Connecting seat; 412. Internal thread groove; 421. Fixed outer cover; 422. Crushing ring one; 423. Inner cavity; 424. Inner wall cavity; 425. Moving cylinder; 426. Crushing ring two; 427. Connecting groove; 428. Connecting shaft; 429. Inner top ring; 431. Screw; 441. Wrapping layer. Detailed Implementation
[0027] The following is in conjunction with the appendix Figure 1 -Appendix Figure 9 This application will be described in further detail below.
[0028] A casting mold for producing water meter casings, as shown in the reference. Figures 1-4The system includes a front mold 1, with a rear mold 2 at its rear end. The front mold 1 and the rear mold 2 are connected by a sealing mechanism 3, which effectively improves the connection stability and sealing of the front mold 1 and the rear mold 2. A skeleton mechanism 4 is provided between the front mold 1 and the rear mold 2. The front mold 1 and the rear mold 2 are mirror images of each other and have identical components. The front end of the rear mold 2 has a groove 21. After the front mold 1 and the rear mold 2 are fitted together, the two sets of grooves 21 can form a mold cavity. The rear end of the groove 21 has no less than two sets of pouring ports 22 for pouring from the bottom of the front and rear sides of the mold cavity. The left and right sides and the top center of the mold 2 are provided with through openings 23 for connecting grooves 21, which is conducive to the extension and positioning of the skeleton mechanism 4. A set of fasteners 24 are provided on the outside of each through opening 23, which can improve the connection stability between the front mold 1 and the rear mold 2. The front end of the rear mold 2 is provided with an extension plate 25 for easy connection with the sealing mechanism 3. The outer side of the front end face of the rear mold 2 is provided with a guide 26. The guide 26 on the front end face of the rear mold 2 is a guide plate, and the guide 26 on the rear end face of the front mold 1 is a guide groove. After the front mold 1 and the rear mold 2 are fitted together, the guide plate is inserted into the guide groove to improve the fitting accuracy.
[0029] Specifically, the front mold 1 and the rear mold 2 are mirror images with identical components and are connected by a sealing mechanism 3. After the mold is closed, the groove 21 forms a cavity that matches the shape of the shell. The pouring port 22 at the rear end of the groove 21 allows for smooth filling from both sides and the bottom. The through port 23 provides an extension and positioning channel for the skeleton mechanism 4. The fastener 24 achieves subsequent sealing and locking. The extension plate 25 provides an installation base for the sealing mechanism 3. The guide 26 ensures the guiding accuracy when the front mold 1 and the rear mold 2 are closed. This constructs the basic framework of the mold, realizes the functions of mold closing positioning, pouring guidance, and skeleton positioning, and provides an integrated foundation.
[0030] A casting mold for producing water meter casings, as shown in the reference. Figure 1 , Figure 2 and Figure 5The sealing mechanism 3 includes a fastening sleeve 31, an upper sealing frame 32, a covering sleeve 33, a lower sealing frame 34, a sealing groove 35, and a fixing hole 36. Fastening sleeves 31 are provided on the outer sides of the fasteners 24. Each fastener 24 has external threads on its outer side, and each fastening sleeve 31 has corresponding internal threads on its inner side. After the two sets of fasteners 24 are fitted together, they can be locked together through the threads of the fastening sleeves 31, firmly locking the front mold 1 and the rear mold 2, improving the connection sealing, preventing molten metal leakage, ensuring the safety of the pouring process and the dimensional accuracy of the casting, providing reliable connection and convenient assembly and disassembly. An upper sealing frame 32 is provided on the outer side of the upper extension plate 25, and... The upper sealing frame 32 has a corresponding covering sleeve 33 at the middle end of the fastening sleeve 31, which can cover the upper fastening sleeve 31 to improve the overall integrity. Furthermore, the fastening sleeve 31 has a through hole at the middle end, which is conducive to the passage of the skeleton mechanism 4. The lower sealing frame 34 is provided on the outer side of the lower extension plate 25. The upper sealing frame 32 and the lower sealing frame 34 both have sealing grooves 35 at their inner ends, which can be inserted into the sealing grooves 35 to clamp the front mold 1 and the rear mold 2. The upper sealing frame 32 and the lower sealing frame 34 both have no less than two sets of fixing holes 36 at their front ends, which can be locked by installing fixing bolts into the fixing holes 36.
[0031] Specifically, the fastening sleeve 31 is locked in place with the fastener 24. The upper sealing frame 32 and the lower sealing frame 34 are respectively installed on the outside of the extension plates 25 at the upper and lower ends. The covering sleeve 33 can achieve integrated coverage of the top fastening sleeve 31. The sealing groove 35 can accommodate the extension plate 25, improving the mold sealing performance of the front mold 1 and the rear mold 2. The fixing hole 36 enhances the reinforcement effect, realizing multi-point locking and full sealing after mold closing, effectively preventing molten metal leakage during pouring, and improving the safety and stability of the pouring process.
[0032] A casting mold for producing water meter casings, as shown in the reference. Figure 2 and Figures 6-9The skeleton mechanism 4 includes a horizontal arm 41, a crushing mechanism 42, a vertical arm 43, molding sand 44, and a flange 45. The horizontal arm 41 is arranged laterally at the bottom end of the groove 21. A connecting seat 411 is provided at the middle end of the horizontal arm 41, and an internal thread groove 412 is provided at the middle end of the connecting seat 411. The vertical arm 43 is connected through the internal thread groove 412 to form an inverted "T" shaped skeleton. The left and right ends of the horizontal arm 41 and the top of the vertical arm 43 extend to the outside of the front mold 1 and the rear mold 2 through the opening 23. The left and right ends of the horizontal arm 41 and the top of the vertical arm 43 are exposed outside the mold. After casting, they can be removed from the outside by vibration or tapping. Applying force to the horizontal arm 41 and the vertical arm 43 facilitates the shaking off of the molding sand 44 and the separation and removal of the horizontal arm 41 and the vertical arm 43, improving operational convenience and sand removal efficiency. A crushing mechanism 42 is connected to the bottom outer end of the vertical arm 43, which helps to improve the stripping effect of the molding sand 44. Both the outer ends of the horizontal arm 41 and the vertical arm 43 are covered with molding sand 44, forming the internal cavity of the water meter casing. A wrapping layer 441 is provided on the outside of the molding sand 44, which acts as a barrier during casting to prevent the surface molding sand 44 from falling off, improving the integrity of the molding sand 44 and ensuring the water meter casing's integrity. The integrity and consistency of the internal cavity space are further enhanced by the fact that the covering layer 441 is a ceramic fiber mesh. This ceramic fiber mesh does not melt during casting and does not adhere to the casting. Furthermore, during sand removal, it can break off along with the molding sand 44 without additional processing. The outer sides of the horizontal arm 41 and vertical arm 43, corresponding to the coverage area of the molding sand 44, are provided with spiral-shaped flanges 45. This significantly increases the contact area and mechanical interlocking force between the molding sand 44 and the horizontal arm 41 and vertical arm 43, improving the connection stability between the molding sand 44 and the horizontal arm 41 and vertical arm 43, making it less prone to peeling off. Simultaneously, the spiral structure also aids in breaking the sand during sand removal. The broken molding sand 44 balances anchoring strength and sand removal convenience. Both the horizontal arm 41 and the vertical arm 43 have at least two sets of vent holes 46 on their outer sides. The other end of each vent hole 46 passes through the horizontal arm 41 and the vertical arm 43 and is connected to the outside air. The vent holes 46 form an exhaust channel from the inside of the molding sand 44 to the outside of the mold. The gas generated by the heating of the molding sand 44 during casting can be discharged in time along the vent holes 46, avoiding the formation of air holes on the inner surface of the casting. This improves the sealing and pressure bearing capacity of the water meter shell. In addition, during subsequent sand removal, gas can be injected from the outside to the inside through the vent holes 46 to help improve the sand removal efficiency.
[0033] By adopting the above technical solution, the horizontal arm 41 is detachably connected to the vertical arm 43 through the internal thread groove 412 in the connecting seat 411, forming an inverted "T" shaped skeleton, providing overall support and positioning foundation. The crushing mechanism 42 on the outside of the vertical arm 43 can assist in crushing the molding sand 44 during demolding. The molding sand 44 wraps around the outer ends of the horizontal arm 41 and the vertical arm 43, constructing the internal cavity of the water meter housing. The flange 45 enhances the stability and firmness of the molding sand 44 wrapping. The vent hole 46 connects to the outside air to exhaust air and prevents air bubbles from forming in the water meter housing.
[0034] A casting mold for producing water meter casings, as shown in the reference. Figures 6-8 The crushing mechanism 42 includes a fixed outer cover 421, a first crushing ring 422, an inner cavity 423, an inner wall cavity 424, a movable cylinder 425, a second crushing ring 426, a connecting groove 427, a connecting shaft 428, and an inner top ring 429. A set of fixed outer covers 421 is fixedly connected to the outer bottom end of the longitudinal arm 43, and a set of first crushing rings 422 is connected to the outer bottom end of the fixed outer cover 421. When the longitudinal arm 43 rotates, the first crushing rings 422 can be driven to rotate synchronously through the fixed outer cover 421 to achieve the rotational crushing of the molding sand 44. The inner end of the fixed outer cover 421 has an inner cavity 423. When the longitudinal arm 43 is connected to the transverse arm 41, the fixed outer cover 421 can insert the connecting seat 411 into the inner cavity 423, which can accommodate the inner thread groove 412 and the screw. The connection area of 431 is covered and protected to prevent molding sand 44 from falling into the internal thread groove 412 and affecting the connection stability of the horizontal arm 41 and the vertical arm 43. The inner wall of the fixed outer cover 421 has an annular inner wall cavity 424. A set of movable cylinders 425 are installed in the inner wall cavity 424. The movable cylinders 425 can rotate and move up and down in the inner wall cavity 424. The bottom end of the movable cylinders 425 extends through to the bottom end of the fixed outer cover 421 and is connected to a set of crushing rings 426. Both the crushing rings 426 and the crushing rings 422 have at least two sets of convex teeth arranged circumferentially on their outer sides to enhance the crushing effect on the molding sand 44. The inner wall cavity 424 has at least two sets of connecting grooves 427 with a spiral structure. Furthermore, the spiral direction of the connecting groove 427 is opposite to the spiral direction of the internal thread groove 412 and the screw 431, which ensures that when the longitudinal arm 43 is spiraled out, the fixed outer cover 421 can drive the moving cylinder 425 and the second crushing ring 426 to rotate synchronously. The inner top of the moving cylinder 425 is provided with at least two sets of connecting shafts 428 at equal intervals. The other end of each connecting shaft 428 extends through the connecting groove 427 into the inner cavity 423 and is connected to a set of inner top rings 429. When the fixed outer cover 421 is fitted onto the outside of the connecting seat 411 from top to bottom, the inner top rings 429 can contact the top surface of the connecting seat 411, initially limiting the movement of the moving cylinder 425 and the second crushing ring 426. When the fixed outer cover 421 is completely fitted onto the top of the connecting seat 411... The moving cylinder 425 is fully retracted into the inner wall cavity 424, and the second crushing ring 426 is close to the bottom of the first crushing ring 422. When the longitudinal arm 43 rotates in the opposite direction and separates from the transverse arm 41, the fixed outer cover 421 and the first crushing ring 422 rotate upward first to perform preliminary crushing on the surrounding molding sand 44. At this time, the connecting shaft 428 can rotate along the connecting groove 427, and the inner top ring 429 is still attached to the top surface of the connecting seat 411. When the connecting shaft 428 falls to the bottom of the connecting groove 427, the fixed outer cover 421 can drive the moving cylinder 425 and the second crushing ring 426 to rotate synchronously. At this time, the distance between the first crushing ring 422 and the second crushing ring 426 is widened, which can perform secondary crushing on the surrounding molding sand 44 and improve the crushing effect on the molding sand 44.
[0035] Specifically, when the fixed outer cover 421 rotates, it can drive the first crushing ring 422 to rotate synchronously, crushing the molding sand 44. The moving cylinder 425 can rotate and move up and down along the inner wall cavity 424, driving the second crushing ring 426 to move synchronously. Together with the first crushing ring 422, it can improve the crushing effect on the molding sand 44. After casting and cooling, it can efficiently crush the molding sand 44, causing the molding sand 44 to fall off from the horizontal arm 41 and the vertical arm 43, which is convenient for subsequent separation and core extraction. The sand cleaning operation is simple.
[0036] A casting mold for producing water meter casings, as shown in the reference. Figure 7 The bottom end of the longitudinal arm 43 is provided with a screw 431 corresponding to the internal thread groove 412. The longitudinal arm 43 can be connected to the transverse arm 41 through the screw 431. The threads of the internal thread groove 412 and the screw 431 are both trapezoidal threads or rectangular threads, with larger tooth profiles and stronger resistance to high temperature adhesion.
[0037] Specifically, the longitudinal arm 43 can be threadedly connected to the transverse arm 41 via the screw 431. The connection is reliable and detachable. After casting, the longitudinal arm 43 and the transverse arm 41 can be separated and extracted from the casting respectively. They can be reused, reducing material costs.
[0038] This application provides a casting mold for water meter housing production. Through guides 26 and extension plates 25 mounted on the front mold 1 and rear mold 2, and a sealing mechanism 3 on the outer sides of the front mold 1 and rear mold 2, the sealing mechanism 3 includes components such as a fastening sleeve 31, an upper sealing frame 32, a covering sleeve 33, a lower sealing frame 34, a sealing groove 35, and a fixing hole 36. This achieves precise guidance and multi-point locking during mold closing. The guide plate and guide groove of the guide 26 cooperate to ensure mold closing accuracy. The upper sealing frame 32 and lower sealing frame 34 accommodate the extension plate 25 through the sealing groove 35. The fastening sleeve 31 and fastener 24 are threaded together to form a complete seal, effectively preventing metal from leaking during casting. Liquid leakage from the parting surface improves the connection stability and mold closing accuracy of the mold, ensuring the consistency of casting dimensions and the safety of the pouring process. A skeleton mechanism 4, located between the front mold 1 and the rear mold 2, is used. The skeleton mechanism 4 includes components such as a horizontal arm 41, a crushing mechanism 42, a vertical arm 43, molding sand 44, a flange 45, and vent holes 46. The horizontal arm 41 and the vertical arm 43 are detachably connected via the crushing mechanism 42 to form an inverted "T"-shaped skeleton. The crushing mechanism 42 covers and protects the connection point between the horizontal arm 41 and the vertical arm 43, and during disassembly, it improves the crushing effect on the molding sand 44, facilitating the recovery of the horizontal arm 41 and the vertical arm 43. The outer side is provided with a spiral flange 45, and the molding sand 44 is also wrapped with a ceramic fiber coating layer 441. The inverted "T" shaped skeleton is used to achieve stable positioning of the sand core in the cavity. The spiral flange 45 greatly enhances the interlocking force between the molding sand 44 and the skeleton. The coating layer 441 acts as a barrier during casting to prevent the molding sand 44 from being washed away, which significantly improves the integrity and erosion resistance of the sand core. The vent hole 46 can form a ventilation channel to timely discharge the gas generated by the heating of the molding sand 44, avoid the formation of porosity in the casting, and ensure the molding quality of the inner cavity of the water meter shell. The crushing mechanism 42 is set at the bottom of the outer side of the longitudinal arm 43. The crushing mechanism 42 includes a fixed outer cover. The components 421, crushing ring 422, inner cavity 423, inner wall cavity 424, moving cylinder 425, crushing ring 426, connecting groove 427, connecting shaft 428, and inner top ring 429, in cooperation with each other, can achieve efficient crushing of the cast molding sand 44 and convenient separation of the skeleton. The crushing ring 422 and crushing ring 426 in the crushing mechanism 42 perform two-stage crushing of the molding sand 44 when the longitudinal arm 43 rotates out. At the same time, vibration or knocking force can be applied to the end of the horizontal arm 41 and the longitudinal arm 43 that extends to the outside of the front mold 1 and the rear mold 2, making the sand cleaning operation faster and more effective. Moreover, the skeleton can be reused, which greatly reduces the cost of consumables and the production cycle.
[0039] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.
Claims
1. A casting mold for producing water meter housings, characterized in that: It includes a front mold (1), and a rear mold (2) is provided at the rear end of the front mold (1). The front mold (1) and the rear mold (2) are connected by a sealing mechanism (3) on the outside. A skeleton mechanism (4) is provided between the front mold (1) and the rear mold (2). The front mold (1) and the rear mold (2) are mirror images of each other and have the same components. The front end of the rear mold (2) is provided with a groove (21). The rear end of the groove (21) is provided with no less than two sets of pouring ports (22). The left and right sides and the top center of the rear mold (2) are provided with through ports (23) that connect to the groove (21). The outer side of each through port (23) is provided with a set of fasteners (24). The front end of the rear mold (2) is provided with an extension plate (25). The outer side of the front end face of the rear mold (2) is provided with a guide (26).
2. The casting mold for producing a water meter housing according to claim 1, characterized in that: The sealing mechanism (3) includes a fastening sleeve (31), an upper sealing frame (32), a covering sleeve (33), a lower sealing frame (34), a sealing groove (35), and a fixing hole (36). The fastener (24) is provided with a fastening sleeve (31) on its outer side. The upper sealing frame (32) is provided on the outer side of the upper extension plate (25), and the upper sealing frame (32) is provided with a covering sleeve (33) corresponding to the fastening sleeve (31) at its middle end. The lower sealing frame (34) is provided on the outer side of the lower extension plate (25). The upper sealing frame (32) and the lower sealing frame (34) are both provided with a sealing groove (35) at their inner ends. The upper sealing frame (32) and the lower sealing frame (34) are both provided with at least two sets of fixing holes (36) at their front ends.
3. The casting mold for producing a water meter housing according to claim 1, characterized in that: The skeleton mechanism (4) includes a horizontal arm (41), a crushing mechanism (42), a vertical arm (43), molding sand (44), and a flange (45). The horizontal arm (41) is arranged horizontally at the bottom end of the groove (21). A connecting seat (411) is provided at the middle end of the horizontal arm (411). An internal thread groove (412) is provided at the middle end of the connecting seat (411), and the vertical arm (43) is connected through the internal thread groove (412). The crushing mechanism (42) is connected to the bottom end of the vertical arm (43). The outer ends of the horizontal arm (41) and the vertical arm (43) are covered with molding sand (44). A flange (45) is provided on the outer side of the horizontal arm (41) and the vertical arm (43) corresponding to the coverage area of the molding sand (44). The outer side of the horizontal arm (41) and the vertical arm (43) are provided with no less than two sets of vent holes (46). The other end of the vent holes (46) all pass through the horizontal arm (41) and the vertical arm (43) and communicate with the outside air.
4. The casting mold for producing a water meter housing according to claim 3, characterized in that: The crushing mechanism (42) includes a fixed outer cover (421), a first crushing ring (422), an inner cavity (423), an inner wall cavity (424), a moving cylinder (425), a second crushing ring (426), a connecting groove (427), a connecting shaft (428), and an inner top ring (429). The bottom of the longitudinal arm (43) is provided with a set of fixed outer covers (421), and the bottom of the fixed outer cover (421) is connected to a set of first crushing rings (422). The inner end of the fixed outer cover (421) is provided with an inner cavity (423), and the inner wall of the fixed outer cover (421) is provided with an inner wall cavity (424). The inner wall cavity (424) is connected to a set of movable cylinders (425). The bottom end of the movable cylinder (425) extends through to the bottom end of the fixed outer cover (421) and is connected to a set of crushing rings (426). The inner side of the inner wall cavity (424) is connected to the inner cavity (423) through no less than two sets of connecting grooves (427). The top of the inner side of the movable cylinder (425) is provided with no less than two sets of connecting shafts (428) at equal intervals. The other end of the connecting shafts (428) extends through the connecting grooves (427) into the inner cavity (423) and is connected to a set of inner top rings (429).
5. The casting mold for producing a water meter housing according to claim 3, characterized in that: The bottom end of the longitudinal arm (43) is provided with a screw (431) with a corresponding internal thread groove (412).
6. The casting mold for producing a water meter housing according to claim 3, characterized in that: The molding sand (44) is provided with a wrapping layer (441) on the outside.
7. The casting mold for producing a water meter housing according to claim 6, characterized in that: The wrapping layer (441) is a ceramic fiber mesh.
8. The casting mold for producing a water meter housing according to claim 3, characterized in that: The left and right ends of the horizontal arm (41) and the top of the vertical arm (43) all extend to the outside of the front mold (1) and the rear mold (2) through the opening (23).
9. The casting mold for producing a water meter housing according to claim 3, characterized in that: The flange (45) has a spiral structure.
10. The casting mold for producing a water meter housing according to claim 2, characterized in that: The fasteners (24) are all provided with external threads on the outside, and the fastening sleeves (31) are all provided with corresponding internal threads on the inside.