Guide element loam core mold with multiple sand shooting ports
By setting multiple sand injection ports on the top of the guide core mold and combining them with telescopic components, the problem of incomplete sand filling in the core shooting machine was solved, achieving efficient and uniform coated sand molding, and improving the internal cavity quality of the guide and the performance of the submersible pump.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGXI SHIMGE MASCH&ELECTRONICS CO LTD
- Filing Date
- 2025-05-12
- Publication Date
- 2026-04-28
AI Technical Summary
In the existing technology, when using a core shooter to make coated sand cores, the uniform distribution of the blades leads to incomplete sand filling when sand is fed from both sides, resulting in defects in the coated sand core and affecting the quality of the inner cavity of the guide and the performance of the submersible pump.
Design a multi-sand-injection guide core mold with multiple sand-injection ports distributed in a ring on the top of the mold. Combined with a telescopic component, this ensures that each cavity has an independent sand-injection port, preventing the blade mold from blocking the sand flow and achieving uniform sand filling.
It improves the molding quality of coated sand cores, ensures the uniformity and integrity of the guide cavity, enhances core-making efficiency, avoids the need for manual repairs, and improves the performance of submersible pumps.
Smart Images
Figure CN224168702U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of core molds, specifically a core mold with multiple sand injection nozzles as a guide component. Background Technology
[0002] The guide component is a key flow-through part of an oil-filled submersible pump. It is generally made of gray cast iron and sand-cast. Structurally, it is a cylindrical shape with a bulge in the middle, and its internal structure is complex, containing several evenly distributed blades. It is typically formed from a coated sand core. Coated sand is molding sand or core sand whose surface is covered with a layer of solid resin film before molding. It is mainly produced using natural quartz sand as the raw sand, thermoplastic phenolic resin, hexamethylenetetramine, and reinforcing agents. Due to its excellent fluidity, smooth surface, and good collapsibility, coated sand is one of the best molding materials for casting. During core making, the coated sand is injected into the core mold cavity using the pressure of a core shooter. After heating and holding at a certain temperature for a few minutes, the coated sand core is formed. During molding, the coated sand core is fixed in a specific position in the mold, and then the mold is closed and the casting is poured. After casting, the coated sand core is encased in the casting. Breaking the coated sand core forms the blade part in the casting. Therefore, the quality of the guide core coating determines the quality of the guide's inner cavity and also affects the performance of the submersible pump.
[0003] Currently, when using core shooting equipment to make coated sand cores, the core mold of the machine generally feeds sand from both sides. Since several blades are evenly distributed in a ring, when sand is fed from both sides, regardless of the angle, there will be blades blocking the sand feeding, resulting in incomplete sand filling and defects in the produced coated sand cores.
[0004] To solve this problem, the sand inlet was changed from both sides to a single sand injection port at the top. The original poor filling of the molded parts improved slightly, but there was still no improvement near the blades. After core making, each core had to be manually repaired with casting core repair paste. This not only resulted in low core making efficiency, but also made it difficult to guarantee the repair quality, leading to poor forming of the guide component coated sand core and affecting the performance of the water pump. Utility Model Content
[0005] The purpose of this invention is to provide a multi-sand-shoot guide core mold. This multi-sand-shoot guide core mold can achieve efficient and uniform sand-shooting molding, avoid incomplete sand filling and resulting defects in the coated sand core, and ensure the molding quality of the coated sand core of the guide.
[0006] The above-mentioned optimized structure of this utility model is achieved through the following technical solution: a multi-shot sand nozzle guide core mold, including a mold core;
[0007] The mold body is coaxially disposed on the mold core and pressed together with the mold core to form a molding cavity; it also includes a plurality of blade molds, which are arranged in a ring shape in the molding cavity and divide the middle part of the molding cavity into a plurality of cavities.
[0008] Multiple sand injection ports are arranged in a ring on the top of the mold body and correspond one-to-one with the cavity. The sand injection ports are connected to the cavity.
[0009] In some embodiments, the mold core includes a fixing block;
[0010] A shaped cone is disposed on the fixed block.
[0011] In some embodiments, the mold body includes a forming cone ring, the forming cone ring being coaxially sleeved on the forming cone platform, and a plurality of the blade molds being provided between the forming cone ring and the forming cone platform;
[0012] A connecting block is disposed at the top of the forming cone ring, and a plurality of sand injection ports are provided through the top of the connecting block. The connecting block, the forming cone ring, the fixing block, and the forming cone frustum form the forming cavity.
[0013] Four connecting plates are symmetrically arranged on the top of the connecting block.
[0014] In some embodiments, the connecting plate is a U-shaped plate.
[0015] In some embodiments, a plurality of heating holes are also included, which penetrate the side of the fixing block and the connecting block.
[0016] In some embodiments, the mold body further includes a plurality of arc-shaped grooves, which are arranged in a ring and pass through the forming cone ring, and are inserted into the blade mold.
[0017] In some embodiments, a telescopic assembly is further included, the telescopic assembly being disposed between the forming cone ring and the blade mold;
[0018] The telescopic component includes two fixed seats, which are symmetrically arranged on both sides of the arc-shaped groove.
[0019] A connecting rod, which is coaxially mounted on the fixed base;
[0020] A telescopic cylinder is connected to the connecting rod, and the output shaft of the telescopic cylinder is fixedly connected to the blade mold.
[0021] In some embodiments, the mounting base is provided with a threaded hole, and the connecting rod is threadedly connected to the mounting base.
[0022] In summary, this utility model has the following beneficial effects:
[0023] This type of multi-sand-injection guide core mold features multiple sand-injection nozzles arranged in a ring on the top of the mold body. This ensures that each cavity has its own independent sand-injection nozzle, avoiding the obstruction of sand flow within the molding cavity caused by multiple cavities sharing a single nozzle. This allows the sand to evenly fill the entire molding cavity, thus improving the molding quality of the core. Simultaneously, the telescopic component allows the blade mold to move within an arc-shaped groove, accommodating the production needs of guide components of different sizes and facilitating core demolding after molding. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the structure of this utility model;
[0025] Figure 2 This is a top view of the present invention without the connecting plate;
[0026] Figure 3 This utility model Figure 2 Sectional view along the middle AA direction;
[0027] Figure 4 This is a schematic diagram of the structure of the mold core of this utility model;
[0028] Figure 5 This is a schematic diagram of the structure of the mold of this utility model.
[0029] In the diagram: 1. Mold core; 11. Fixing block; 12. Forming cone; 2. Mold body; 21. Forming cone ring; 22. Connecting block; 23. Arc groove; 24. Connecting plate; 3. Forming cavity; 4. Blade mold; 5. Cavity; 6. Sand injection port; 7. Heating hole; 8. Telescopic component; 81. Fixing seat; 82. Connecting rod; 83. Telescopic cylinder. Detailed Implementation
[0030] 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.
[0031] refer to Figures 1-5A multi-sand-shot guide core mold includes a core 1, a mold body 2, blade molds 4, and sand-shot nozzles 6. The core 1 is mounted on the worktable of a core-shooting machine. The mold body 2 is coaxially mounted on the core 1 and installed on the crossbeam of the core-shooting machine, and can rise and fall with the crossbeam. The cores 1 and 2 are pressed together to form a molding cavity 3. Multiple blade molds 4 are arranged in a ring within the molding cavity 3, dividing the middle of the molding cavity 3 into multiple cavities 5. There can be 7 blade molds 4. Multiple sand-shot nozzles 6 are arranged in a ring on the top of the mold body 2, corresponding one-to-one with the cavities 5. There can be 7 sand-shot nozzles 6. The bottom of the sand inlet 6 is connected to the cavity 5, and the top is connected to the sand injection port of the core shooter. The sand injection port of the core shooter moves down and comes into close contact with the multiple sand injection ports 6 above the mold body 2. Under the action of the specified pressure, the coated sand in the container above the core shooter is injected into the cavity 5 formed by the mold core 1, the mold body 2 and the 7 blade molds 4 through the multiple sand injection ports 6. Since each cavity 5 has a corresponding sand injection port 6 during sand injection, the blade molds 4 can avoid obstructing the flow of sand in the forming cavity 3, so that the sand can fill the entire forming cavity 3 and ensure the quality of the coated sand core forming.
[0032] In some embodiments, the mold core 1 includes a fixing block 11 and a forming cone 12. The fixing block 11 can be a cuboid. The fixing block 11 is installed on the worktable of the core shooting machine and can be fixed by bolts to provide an installation reference. The fixing block 11 can be provided with four through holes, which can be inserted and cooperated with the ejector rod of the core shooting machine to facilitate the ejection of the formed clay core. The forming cone 12 is provided on the fixing block 11 and can form the inner contour of the forming cavity 3 with the mold body 2. The size and shape of the forming cone 12 can be designed according to the clay core to be formed.
[0033] In some embodiments, the mold body 2 includes a forming cone ring 21, a connecting block 22, and four connecting plates 24. The forming cone ring 21 is coaxially sleeved on the forming cone 12, forming an annular forming cavity 3 between the forming cone ring 21 and the forming cone 12. Multiple blade molds 4 are provided between the forming cone ring 21 and the forming cone 12. The connecting block 22 is located at the top of the forming cone ring 21, and multiple sand injection ports 6 are provided through the top of the connecting block 22. The connecting block 22, the forming cone ring 21, the fixing block 11, and the forming cone 12 form the forming cavity 3. The four connecting plates 24 are symmetrically arranged at the top of the connecting block 22. The connecting plates 24 can be U-shaped plates. The four connecting plates 24 can be fixed to the crossbeam of the core shooting machine using bolt assemblies, thereby fixing the mold body 2 to the crossbeam of the core shooting machine to realize the lifting and lowering of the mold body 2 on the core shooting machine.
[0034] In some embodiments, a plurality of heating holes 7 are also included, which penetrate the sides of the fixing block 11 and the connecting block 22. Heating tubes can be installed in the heating holes 7 to heat the coating sand inside the mold core 1 and the mold body 2.
[0035] In some embodiments, in order to achieve stable assembly and positioning of the blade mold 4 on the forming cone ring 21, the mold body 2 further includes a plurality of arc-shaped grooves 23. The plurality of arc-shaped grooves 23 pass through the forming cone ring 21 in a ring shape and are inserted into the blade mold 4. Their cross-sectional shape matches the outer contour of the blade mold 4, which can provide basic structural support for the subsequent fixing and position adjustment of the blade mold 4, while ensuring the sealing during molding. The insertion and sealing of the blade mold 4 with the arc-shaped grooves 23 is the prior art, and will not be described in detail here.
[0036] In some embodiments, a telescopic component 8 is also included. The telescopic component 8 is disposed between the forming cone ring 21 and the blade mold 4, which facilitates the adjustment of the position of the blade mold 4 according to different process requirements during actual production, as well as the demolding of the subsequent forming core.
[0037] Specifically, the telescopic assembly 8 includes two fixed seats 81, a connecting rod 82, and a telescopic cylinder 83. The two fixed seats 81 are symmetrically arranged on both sides of the arc groove 23 and can be fixed to the outer wall of the forming cone ring 21 by welding or bolting. They can provide fixed support points for the subsequent installation of the connecting rod 82 and the telescopic cylinder 83. The fixed seats 81 can be cylindrical. The connecting rod 82 is coaxially arranged on the fixed seats 81 and can serve as the installation base for the telescopic cylinder 83. The telescopic cylinder 83 is connected to the connecting rod 82, and the output shaft of the telescopic cylinder 83 is fixedly connected to the blade mold 4. Through the telescopic movement of the telescopic cylinder 83, the blade mold 4 can be driven to move along the guide direction of the arc groove 23 on the forming cone ring 21, thereby adjusting its position.
[0038] In some embodiments, to ensure the connection stability between the connecting rod 82 and the fixed seat 81, and to facilitate the installation and disassembly of the connecting rod 82, the fixed seat 81 is provided with a threaded hole. The connecting rod 82 is threadedly connected to the fixed seat 81 and the fixed seat of the telescopic cylinder 83. This not only ensures the connection strength between the connecting rod 82 and the fixed seat 81, but also facilitates the adjustment of the distance between the telescopic cylinder 83 and the fixed seat 81 as needed during actual production, thereby fine-tuning the initial position of the blade mold 4 and compensating for mold wear or installation errors of blade molds of different specifications.
[0039] The specific working principle is as follows:
[0040] Fix the mold core 1 to the worktable of the core shooting machine, and install the mold body 2 on the crossbeam of the core shooting machine through the U-shaped connecting plate 24. Ensure that the forming cone 12 and the forming cone ring 21 are coaxial. Insert the heating tube into the heating hole 7 and connect the power supply. After debugging and preparation, press the button.
[0041] The telescopic cylinder 83 drives the blade mold 4 to move within the arc groove 23, so that its inner arc surface fits against the forming cone 12, thereby forming multiple cavities 5 in the middle of the forming cavity 3.
[0042] At this point, the core shooter's injection nozzle descends and seals with the multiple injection nozzles 6 above the mold body 2. Under the specified pressure, the coated sand in the container above the core shooter is simultaneously injected into the cavity 5 through the multiple injection nozzles 6. The sand material evenly fills the cavity under the action of multi-directional jets, avoiding insufficient filling at the far end caused by a single jet.
[0043] The heating element continuously supplies heat, and the mold raises the temperature of the coated sand to the set process temperature through heat conduction, and holds the pressure for 3 to 4 minutes.
[0044] After the pressure is maintained for the set time, the telescopic cylinder 83 retracts, driving the blade mold 4 to retract radially, releasing the constraint on the core and allowing for demolding.
[0045] The beam of the core shooting machine rises, driving the mold body 2 to move upward. Then, the push rod on the worktable extends out from the through hole on the front of the mold core 1 and contacts the bottom plane of the prepared coated sand core, slowly pushing the core out of the forming cone 12.
[0046] Once the coated sand core has completely separated from the shaped cone 12, the coated sand core can be removed and placed on the workbench.
[0047] Use an air gun to blow away the residual coated sand on mold core 1 and mold body 2, then start the equipment to reset the mold and return it to the working state. Repeat the above steps to make the next coated sand core.
[0048] 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 multi-shot sand-hole guide core mold, comprising a core (1); Mold body (2), the mold body (2) is coaxially disposed on the mold core (1) and is pressed with the mold core (1) to form a molding cavity (3); characterized in that: It also includes multiple blade molds (4), which are arranged in a ring within the molding cavity (3) and divide the middle part of the molding cavity (3) into multiple cavities (5). Multiple sand injection ports (6) are arranged in a ring on the top of the mold body (2) and correspond one-to-one with the cavity (5). The sand injection ports (6) are connected to the cavity (5).
2. The multi-shot sand-hole guide core mold according to claim 1, characterized in that: The mold core (1) includes a fixing block (11); A shaped cone (12) is provided on the fixed block (11).
3. The multi-shot sand-hole guide core mold according to claim 2, characterized in that: The mold body (2) includes a forming cone ring (21), which is coaxially sleeved on the forming cone truncated (12), and a plurality of blade molds (4) are provided between the forming cone ring (21) and the forming cone truncated (12). A connecting block (22) is located on the top of the forming cone ring (21). The top of the connecting block (22) is provided with a plurality of sand-shooting ports (6). The connecting block (22), the forming cone ring (21), the fixing block (11) and the forming cone (12) form the forming cavity (3). Four connecting plates (24) are symmetrically arranged on the top of the connecting block (22).
4. A multi-shot sand-hole guide core mold according to claim 3, characterized in that: The connecting plate (24) is a U-shaped plate.
5. A multi-shot sand-hole guide core mold according to claim 3, characterized in that: It also includes multiple heating holes (7), which penetrate the sides of the fixing block (11) and the connecting block (22).
6. A multi-shot sand-point guide core mold according to claim 3, characterized in that: The mold body (2) also includes multiple arc-shaped grooves (23), which are arranged in a ring and pass through the forming cone ring (21) and are inserted into the blade mold (4).
7. A multi-shot sand-point guide core mold according to claim 6, characterized in that: It also includes a telescopic component (8), which is disposed between the forming cone ring (21) and the blade mold (4); The telescopic component (8) includes two fixed seats (81), which are symmetrically arranged on both sides of the arc-shaped groove (23); A connecting rod (82) is coaxially mounted on the fixed base (81); Telescopic cylinder (83) is connected to the connecting rod (82), and the output shaft of the telescopic cylinder (83) is fixedly connected to the blade mold (4).
8. A multi-shot sand-point guide core mold according to claim 7, characterized in that: The fixed base (81) is provided with a threaded hole, and the connecting rod (82) is threadedly connected to the fixed base (81).