Sewage pump body casting mold of combined loam core

Abstract

The utility model discloses a sewage pump body casting mould of a combined loam core, which relates to the technical field of casting moulds and comprises a mould plate, two upper mould patterns symmetrically arranged on the top surface of the mould plate, lower mould patterns symmetrically arranged on the bottom surface of the mould plate, a straight pouring column arranged at the central position of the top surface of the mould plate, and an upper cross gate arranged at the central position of the bottom surface of the mould plate. The arc inner pouring gate is arranged on one side of the lower mold, the square flange inner pouring gate is arranged on the other side of the lower mold, the square flange inner pouring gate, the arc inner pouring gate and the straight pouring column are connected in a spaced mode through the upper transverse pouring gate, and the loam core set corresponds to the upper mold and the lower mold; automatic line modeling production can be achieved, the appearance of a casting is attractive, meanwhile, production efficiency is improved, the production period is shortened, and timely delivery of products is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of casting mold technology, specifically to a sewage pump body casting mold with a combined mud core. Background Technology

[0002] The DWE sewage pump is an electric irrigation and drainage device that integrates a water pump and a three-phase asynchronous motor. In the DWE sewage pump, the pump body, as the core component, is typically made of gray cast iron and formed using a sand casting process. This pump body has a unique volute-like shape and three counter-distributed feet at the bottom for mounting and supporting the entire pump. As it is an external part, the casting quality of the pump body not only affects the overall performance stability of the pump but also its aesthetic appearance.

[0003] However, during the pump body casting process, the design of the three reverse feet makes demolding difficult during the molding stage, preventing the direct application of highly automated production line molding processes. To address this issue, a common method currently used is a wet clay molding method using manual molds combined with a three-layer box, with the three reverse feet designed as movable blocks for easy removal during molding. While this method meets production needs to some extent, manual operation results in low production efficiency, and the appearance quality of the casting blanks is poor, failing to meet customer requirements for product delivery time and aesthetics. Utility Model Content

[0004] The purpose of this invention is to provide a combined mud core sewage pump body casting mold, which can realize automated line molding production, make the castings look beautiful, improve production efficiency, shorten the production cycle, and ensure timely delivery of products.

[0005] The above-mentioned optimized structure of this utility model is achieved through the following technical solution: a sewage pump body casting mold with combined mud core, including a mold plate;

[0006] Two upper patterns are symmetrically arranged on the top surface of the template.

[0007] Two lower patterns are symmetrically arranged on the bottom surface of the template;

[0008] A direct-cast column, wherein the direct-cast column is located at the center of the top surface of the template;

[0009] The upper horizontal runner is located at the center of the bottom surface of the mold plate;

[0010] Two arc-shaped inlet gates are provided on one side of the lower mold.

[0011] The flange inner gating system is located on the other side of the lower pattern, and the flange inner gating system, the arc inner gating system and the straight gating column are connected in a vacuum through the upper horizontal gating system.

[0012] Two core groups are provided, which are set up corresponding to the upper pattern and the lower pattern.

[0013] In some embodiments, the template includes a boss disposed on the bottom surface of the template, and the boss is provided with the lower pattern and the upper horizontal runner;

[0014] The groove is located on the top surface of the mold plate. The bottom wall of the groove is provided with the upper pattern, the straight pouring column, the arc-shaped inlet sprue, and the flange inlet sprue. The boss is inserted into the groove.

[0015] In some embodiments, the template further includes a plurality of locking holes, which are arranged in a matrix and extend through the template.

[0016] Two threaded holes are symmetrically located at both ends of the template.

[0017] Four positioning holes are symmetrically arranged at both ends of the frame, and two positioning holes located at the same end are symmetrically arranged on both sides of the threaded hole.

[0018] In some embodiments, two exhaust vents are also included, one end of which is connected to the lower pattern and the other end of which is connected to the template.

[0019] In some embodiments, the upper pattern includes an upper molding structure, which is connected to the arc-shaped inner gating.

[0020] An upper flange structure, wherein the upper flange structure is connected to the inner runner of the flange;

[0021] The upper semi-cylinder has an upper forming structure at one end and an upper flange structure in the middle.

[0022] In some embodiments, the lower pattern includes a lower molding structure, which is coaxially arranged with the upper molding structure;

[0023] A lower flange structure, which is provided correspondingly to the upper flange structure;

[0024] The lower semi-cylinder has the lower forming structure at one end, the lower flange structure in the middle, and the vent plate connected to the other end of the lower flange structure.

[0025] In some embodiments, the core assembly includes a large core, which corresponds to the lower pattern.

[0026] Small clay cores are provided corresponding to the upper pattern and are inserted into and cooperate with the lower pattern.

[0027] In some embodiments, the large core includes a molding cap, which is disposed corresponding to the lower molding structure;

[0028] A molding flow channel is provided at one end of the molding cover and is correspondingly arranged with the lower semi-cylinder.

[0029] A positioning groove, which coaxially penetrates the molded cover.

[0030] In some embodiments, the small core includes a forming disc, which is coaxially arranged with the forming cover;

[0031] A positioning boss is coaxially disposed on the forming plate and is inserted into the positioning groove.

[0032] Three foot grooves are arranged in a ring and extend through the forming disc.

[0033] In summary, this utility model has the following beneficial effects:

[0034] This invention enables automated line molding production by placing a core assembly that can be cast into three bases at corresponding positions within the mold cavity. This results in aesthetically pleasing castings, improved production efficiency, shortened production cycle, and timely product delivery. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of the core removal assembly of this utility model;

[0036] Figure 2 This is a structural schematic diagram of the core removal assembly of this utility model from another perspective;

[0037] Figure 3 This is a schematic diagram of the structure of the core assembly of this utility model;

[0038] Figure 4 This is a schematic diagram of the structure of the large clay core of this utility model;

[0039] Figure 5 This is a schematic diagram of the structure of the small clay core of this utility model.

[0040] In the diagram: 1. Pattern plate; 11. Boss; 12. Groove; 13. Locking hole; 14. Threaded hole; 15. Positioning hole; 2. Upper pattern; 21. Upper forming structure; 22. Upper flange structure; 23. Upper semi-cylinder; 3. Lower pattern; 31. Lower forming structure; 32. Lower flange structure; 33. Lower semi-cylinder; 4. Sprue column; 5. Upper runner; 6. Arc ingate; 7. Flange ingate; 8. Core assembly; 81. Large core; 811. Forming cap; 812. Forming runner; 813. Positioning groove; 82. Small core; 821. Forming disc; 822. Positioning boss; 823. Foot groove; 9. Venting plate. Detailed Implementation

[0041] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0042] refer to Figure 1-5A combined core casting mold for a sewage pump body includes a mold plate 1, two upper molds 2, two lower molds 3, a sprue column 4, an upper horizontal runner 5, two arc-shaped ingates 6, a flange ingate 7, and two core assemblies 8. The two upper molds 2 are symmetrically arranged on the top surface of the mold plate 1 and can be fitted with molding sand to form an upper mold forming cavity. Their shape and size match the upper structure of the sewage pump body, and they are used to form the upper shape of the casting. The lower molds 3 are symmetrically arranged on the bottom surface of the mold plate 1 and can be fitted with molding sand to form a lower mold forming cavity. Their shape and size match the lower structure of the pump body, and they are used to form the lower shape of the casting. The upper and lower mold forming cavities cooperate to form a complete casting cavity. The sprue 4 is located at the center of the top surface of the mold plate 1 and can cooperate with molding sand to form a direct flow channel. This channel can connect to the pouring cup of the automatic molding machine and serves as the initial entry point for molten iron during pouring. The upper horizontal runner 5 is located at the center of the bottom surface of the mold plate 1 and connects to the sprue 4. It can cooperate with molding sand to form an upper horizontal flow channel connected to the direct flow channel, allowing for preliminary distribution and guidance of the molten iron entering the upper horizontal flow channel. The shape and dimensions of the upper horizontal runner 5 can be set according to the flow direction, flow rate, and velocity requirements of the molten iron. The arc-shaped inner runner 6 is located on the lower mold. On one side of the lower pattern 3, the flange inner gating 7 can be combined with molding sand to form an arc-shaped inner runner. The flange inner gating 7, the arc-shaped inner gating 6, and the straight gating column 4 are connected by an upper horizontal gating 5 through a gap. This gap means that there is a gap between the flange inner gating 7, the arc-shaped inner gating 6, and the straight gating column 4. The upper horizontal gating 5 is located on the back of this gap. Therefore, when the upper horizontal gating 5 is combined with molding sand to form an upper horizontal runner, the middle of the upper horizontal runner connects to the straight runner, and both ends connect to the arc-shaped inner runner and the flange inner gating, thus allowing the flow of... Molten iron entering through the direct flow channel can enter the mold cavity through the inner arc flow channel and the inner sprue of the flange, reducing the flow rate and impact force of the molten iron, thereby reducing the scouring of the molding sand, reducing the probability of sand scouring, ensuring the quality of the casting, improving the pass rate and production efficiency. The core assembly 8 is set to correspond to the upper pattern 2 and the lower pattern 3. The core assembly 8 can be placed in the mold cavity at the positions corresponding to the upper pattern 2 and the lower pattern 3, thereby realizing the casting and molding of the sewage pump body with the reverse foot, thus realizing the automatic line molding production of the sewage pump body, making the casting look beautiful, while improving production efficiency, shortening the production cycle, and ensuring timely delivery of products.

[0043] In some embodiments, the mold plate 1 includes a boss 11 and a groove 12. The boss 11 is located on the bottom surface of the mold plate 1 and has a lower pattern 3 and an upper horizontal runner 5. The groove 12 is located on the top surface of the mold plate 1 and has an upper pattern 2, a straight pouring column 4, an arc-shaped ingate 6, and a flange ingate 7 on its bottom wall. The boss 11 and the groove 12 are interlocked. The boss 11 can cooperate with the molding sand to form a concave structure in the lower mold forming cavity, and the groove 12 can cooperate with the molding sand to form a convex structure in the upper mold forming cavity. This facilitates the positioning of the upper mold (a mold sand box with an upper mold forming cavity) and the lower mold (a mold sand box with a lower mold forming cavity) after molding, prevents misalignment, and thus ensures the dimensional accuracy of the casting.

[0044] In some embodiments, the mold plate 1 further includes multiple locking holes 13, two threaded holes 14, and four positioning holes 15. The multiple locking holes 13 are arranged in a matrix through the mold plate 1. During mold installation and use, by inserting bolts into the locking holes and tightening them, the upper and lower molds can be tightly fixed together, preventing the mold from expanding due to molten iron pressure during pouring and ensuring the stability of the casting process. Preferably, there are six locking holes. The cross-section of the locking holes 13 can be convex, allowing for countersunk bolt installation and enhancing the locking effect. The two threaded holes 14 are symmetrically located at both ends of the mold plate 1, allowing for the screwing in of lifting eye bolts during mold installation and removal. By inserting the hook of the chain into the hole of the lifting eye bolt, the mold can be easily lifted. The four positioning holes 15 are symmetrically located at both ends of the mold plate 1, with the two positioning holes 15 at the same end symmetrically located on both sides of the threaded holes 14. During mold installation, they can cooperate with the positioning pins on the mold frame to achieve precise mold positioning.

[0045] In some embodiments, two venting plates 9 are also included. One end of each venting plate 9 is connected to the lower mold 3, and the other end is connected to the mold plate 1. The venting plate 9 may be rectangular and may be made of a metal sheet with a thickness of 0.5-1mm, such as stainless steel or copper. The two venting plates 9 may be staggered. During the pouring of molten iron, the venting plates 9 can expel air from the mold cavity to prevent porosity defects in the casting blank. This is prior art and will not be described in detail here.

[0046] In some embodiments, the upper mold 2 includes an upper molding structure 21, an upper flange structure 22, and an upper semi-cylinder 23. The upper molding structure 21 is connected to the arc-shaped inner sprue 6 and can cooperate with molding sand to form an upper mold molding cavity. The upper flange structure 22 is connected to the flange inner sprue 7 and can cooperate with molding sand to form the upper structure of a square flange. The upper semi-cylinder 23 has the upper molding structure 21 at one end and the upper flange structure 22 in the middle, which can cooperate with molding sand to form a flow channel in the upper mold molding cavity.

[0047] In some embodiments, the lower pattern 3 includes a lower forming structure 31, a lower flange structure 32, and a lower semi-cylinder 33. The lower forming structure 31 can cooperate with molding sand to form a lower mold forming cavity. The lower forming structure 31 and the upper forming structure 21 are coaxially arranged and cooperate with each other to form the cavity of the casting, thereby ensuring the precision and accuracy of the casting shape. The lower flange structure 32 is correspondingly arranged with the upper flange structure 22 and can cooperate with molding sand to form the lower structure of the square flange. It also cooperates with the upper flange structure 22 to ensure the integrity and stability of the casting at the flange part. The lower semi-cylinder 33 has a lower forming structure 31 at one end and a lower flange structure 32 in the middle. The other end of the lower flange structure 32 is connected to an exhaust plate 9, which can cooperate with molding sand to form a flow channel in the upper mold forming cavity.

[0048] In some embodiments, the core assembly 8 includes a large core 81 and a small core 82. The large core 81 is set to correspond to the lower pattern 3 and can cooperate with the cavity to guide the flow of sand in the cavity. The small core 82 is set to correspond to the upper pattern 2 and can be inserted and cooperated with the lower pattern 3 to form three feet.

[0049] In some embodiments, the large core 81 includes a forming cover 811, a forming flow channel 812, and a positioning groove 813. The forming cover 811 is provided corresponding to the lower forming structure 31. The bottom of the forming cover 811 may be provided with a groove, which can be inserted and cooperate with the corresponding boss of the lower forming structure 31 in the cavity to realize the positioning of the large core 81 in the cavity. The forming flow channel 812 is provided at one end of the forming cover 811 and is provided corresponding to the lower semi-cylinder 33, which can form the internal flow channel structure of the casting blank. The positioning groove 813 coaxially penetrates the forming cover 811.

[0050] In some embodiments, the small core 82 includes a forming disc 821, a positioning boss 822, and three bottom grooves 823. The forming disc 821 is coaxially arranged with the forming cover 811. The positioning boss 822 is coaxially arranged on the forming disc 821 and is inserted into the positioning groove 813. The cross-section of the positioning boss 822 can be square, which can realize the positioning of the small core 82 and the large core 81 in the cavity and ensure the forming quality of the internal structure of the casting. The three bottom grooves 823 are ring-shaped and penetrate the forming disc 821, and can form three opposite bottoms of the forming casting blank by pouring.

[0051] The specific working principle is as follows:

[0052] At the mold storage area, use two eye bolts of the corresponding specifications to tighten them to the threaded holes 14 at both ends of the mold plate 1. Insert the hooks of the iron chain and fix them in place. Use a crane to lift the mold to the mold rack at the automatic molding line.

[0053] Align the two positioning holes 15 of the mold with the positioning pins on the mold frame to position the mold and ensure accurate positioning during the molding process. Tighten six bolts of the appropriate specifications to the six locking holes 13 on the mold plate 1 to fix the mold in place and prevent it from moving during the molding process.

[0054] After completing the above preparations, start the automatic molding line machine to perform injection sand molding.

[0055] After the mold is filled with ink and the mold is removed, use a blow gun to blow away the loose sand in the mold cavity to ensure the surface quality of the casting.

[0056] Place the two large clay cores 81 into the molding cavity of the lower pattern 3 to fix them in place. Then place the two small clay cores 82 into the positioning grooves 813 on the large clay cores 81 to ensure that the two clay cores are properly positioned and fitted together.

[0057] Place the filter screen at the sprue position, and then close the mold box. At this time, the two small clay cores 82 and the two corresponding upper forming structures 21 in the cavity are positioned and matched.

[0058] The prepared molten iron is slowly poured into the pouring cup of the mold. The molten iron flows through the pouring cup into the straight runner and the upper horizontal runner, then from the upper horizontal runner into the two arc-shaped inner runners and the two flange-shaped inner runners, and then from two relatively far apart positions into the cavities formed by the two upper molds 2 and the two lower molds 3. At this time, the gas generated inside the cavity is discharged through the two venting plates 9. After the molten iron solidifies, it forms a casting blank. After the casting cools, the mold is opened and the casting blank is removed.

[0059] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A casting mold for a sewage pump body with a combined mud core, characterized in that: Including the template (1); Two upper patterns (2) are symmetrically arranged on the top surface of the template (1); Two lower patterns (3) are symmetrically arranged on the bottom surface of the template (1); A cast-in column (4) is provided at the center of the top surface of the mold plate (1); Upper horizontal runner (5), the upper horizontal runner (5) is located at the center of the bottom surface of the mold plate (1); Two arc-shaped inlet gates (6) are provided on one side of the lower pattern (3); Method flange inner gating (7), the method flange inner gating (7) is located on the other side of the lower pattern (3), the method flange inner gating (7), the arc inner gating (6) and the straight gating column (4) are connected in the air by the upper horizontal gating (5); Two core groups (8) are provided, which are set in accordance with the upper pattern (2) and the lower pattern (3).

2. The sewage pump body casting mold with a combined mud core according to claim 1, characterized in that: The mold plate (1) includes a boss (11), which is located on the bottom surface of the mold plate (1). The boss (11) is provided with the lower pattern (3) and the upper horizontal gating (5). The groove (12) is located on the top surface of the template (1). The bottom wall of the groove (12) is provided with the upper pattern (2), the straight pouring column (4), the arc inlet sprue (6) and the flange inlet sprue (7). The boss (11) is inserted into the groove (12).

3. The sewage pump body casting mold with a combined mud core according to claim 2, characterized in that: The template (1) also includes a plurality of locking holes (13), which are arranged in a matrix and pass through the template (1). Two threaded holes (14) are symmetrically arranged at both ends of the template (1); Four positioning holes (15) are symmetrically arranged at both ends of the frame (12), and two positioning holes (15) located at the same end are symmetrically arranged on both sides of the threaded hole (14).

4. The sewage pump body casting mold with a combined mud core according to claim 1, characterized in that: It also includes two exhaust plates (9), one end of which is connected to the lower pattern (3) and the other end is connected to the mold plate (1).

5. The sewage pump body casting mold with a combined mud core according to claim 4, characterized in that: The upper pattern (2) includes an upper molding structure (21), which is connected to the arc-shaped inner gating (6); Upper flange structure (22), the upper flange structure (22) is connected to the flange inner runner (7); The upper semi-cylinder (23) has the upper forming structure (21) at one end and the upper flange structure (22) in the middle.

6. The sewage pump body casting mold with a combined mud core according to claim 5, characterized in that: The lower pattern (3) includes a lower molding structure (31), which is coaxially arranged with the upper molding structure (21); The lower flange structure (32) is provided in correspondence with the upper flange structure (22); The lower semi-cylinder (33) has the lower forming structure (31) at one end and the lower flange structure (32) in the middle, and the vent plate (9) is connected to the other end of the lower flange structure (32).

7. The sewage pump body casting mold with a combined mud core according to claim 6, characterized in that: The core assembly (8) includes a large core (81), which is provided in accordance with the lower pattern (3); Small clay core (82), which is set corresponding to the upper pattern (2) and is inserted and matched with the lower pattern (3).

8. The sewage pump body casting mold with a combined mud core according to claim 7, characterized in that: The large core (81) includes a molding cover (811), which is provided corresponding to the lower molding structure (31); A molding channel (812) is provided at one end of the molding cover (811) and is correspondingly provided with the lower semi-cylinder (33); Positioning groove (813), which coaxially penetrates the molded cover (811).

9. A sewage pump body casting mold with a combined mud core according to claim 8, characterized in that: The small clay core (82) includes a forming disc (821), which is coaxially arranged with the forming cover (811); A positioning boss (822) is coaxially disposed on the forming disc (821) and is inserted into the positioning groove (813); Three foot grooves (823) are arranged in a ring and penetrate the forming disc (821).

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