Fixing mechanism of suspended easily-collapsible ceramic inner core for precision casting

Abstract

The utility model relates to the technical field of precision casting, and discloses a fixing mechanism of a suspended easily collapsible ceramic inner core for precision casting, which comprises a wax mould shell, a ceramic inner core and a fixing shell, the ceramic inner core is arranged in the center of the wax mould shell, and two sides of the fixing shell are respectively connected with a connecting plate I and a connecting plate II in a sliding manner. Clamping and positioning assemblies are installed on the side faces of the first connecting plate and the second connecting plate, a first clamping plate and a second clamping plate are slidably connected to the bottoms of the first connecting plate and the second connecting plate correspondingly, and quick-change assemblies are installed in the first connecting plate and the second connecting plate correspondingly. In the utility model, the rotary knob and the gear are linked with the rack, so that the connecting plate I and the connecting plate II as well as the clamping plate I and the clamping plate II below the connecting plate I and the connecting plate II stably clamp the wax mould shell and the ceramic inner core, the relative positions of the wax mould shell and the ceramic inner core are kept stable in the casting process, the overall stability of the structure is improved, and the forming precision of a casting and the quality of a final product are improved.

Description

Technical Field

[0001] This utility model relates to the field of precision casting technology, and in particular to a fixing mechanism for a suspended, easily collapsible ceramic core used in precision casting. Background Technology

[0002] Precision casting is a high-precision metal forming process that uses investment casting technology to manufacture metal parts with complex shapes. Its process includes steps such as wax pattern making, tree assembly, coating, investment casting, firing, pouring, and shell removal. This method can obtain castings with accurate dimensions, smooth surfaces, and complex structures, and is widely used in aerospace, automotive, medical, and machinery manufacturing fields. Precision casting can reduce subsequent processing and improve material utilization.

[0003] In precision casting, ceramic cores are high-temperature resistant ceramic components used to form complex hollow structures inside castings. They are mostly straight-through in shape and are placed in the mold during the wax pattern making stage. They are cast together with the mold shell to ensure the dimensional accuracy and surface quality of the casting's internal cavity. The ceramic core is usually suspended in the mold shell by a support bridge. It is often used to manufacture high-end parts with complex structures and fine internal cavities, such as cooling channels and gas channels. Finally, it is removed by chemical or mechanical means.

[0004] Existing ceramic cores possess excellent high-temperature resistance, enabling the fabrication of complex internal channel structures while ensuring dimensional accuracy and surface quality of the casting's internal cavity. However, since ceramic cores are typically suspended and fixed within the wax mold shell via support bridges, their structural stability is insufficient, easily leading to collapse and breakage at the connection point with the wax mold shell. Therefore, a fixing mechanism for suspended, easily collapsible ceramic cores used in precision casting is proposed to address these issues. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a fixing mechanism for a suspended and easily collapsible ceramic core for precision casting, aiming to improve the problem that the existing technology of fixing the ceramic core with a support bridge in a suspended manner has insufficient structural stability and is prone to collapse and breakage at the connection parts.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A fixing mechanism for a suspended, easily collapsible ceramic core for precision casting includes a wax mold shell, a ceramic core, and a fixing shell. The ceramic core is located at the center of the wax mold shell. A connecting plate 1 and a connecting plate 2 are slidably connected to both sides of the fixing shell. Clamping and positioning components are installed on the sides of the connecting plates 1 and 2. Clamping plates 1 and 2 are slidably connected to the bottoms of the connecting plates 1 and 2. Quick-change components are installed inside the connecting plates 1 and 2. Clamping plates 1 and 2 are respectively located on the outer sides of the wax mold shell and the ceramic core. The clamping and positioning components include a rack, which is fixedly connected to the sides of the connecting plates 1 and 2. A rotating column is rotatably connected inside the fixing shell. A gear and a knob are fixedly connected to the outer side and top of the rotating column, respectively. The rack and the gear mesh with each other.

[0008] As a further description of the above technical solution:

[0009] Support plates are fixedly connected to the sides of the first connecting plate and the second connecting plate, and the support plate on one side is slidably connected to the inside of the rack on the other side.

[0010] As a further description of the above technical solution:

[0011] The quick-change assembly includes a slide rod, which is slidably connected inside the first connecting plate and the second connecting plate. One end of the slide rod is fixedly connected to a locking block, and the other end of the slide rod is rotatably connected to a rotating trigger. Both the first connecting plate and the second connecting plate are fixedly connected to baffles, and the slide rod is slidably connected inside the baffles.

[0012] As a further description of the above technical solution:

[0013] A spring is sleeved on the outer periphery of the slide rod, and the spring is disposed between the locking block and the baffle.

[0014] As a further description of the above technical solution:

[0015] The top of both the first clamping plate and the second clamping plate are fixedly connected to a mating plate. The two mating plates are slidably connected inside the first connecting plate and the second connecting plate, respectively. The side of the mating plate is provided with a slot, and the locking block engages with the slot.

[0016] As a further description of the above technical solution:

[0017] A sliding plate is fixedly connected to the top of the docking plate. Both the first connecting plate and the second connecting plate have grooves inside, and the sliding plate is slidably connected inside the grooves.

[0018] As a further description of the above technical solution:

[0019] The fixed shell has a guide opening inside, and the rack and the support plate are slidably connected inside the guide opening;

[0020] As a further description of the above technical solution:

[0021] A guide plate is fixedly connected to the bottom of the fixed shell. Both the first connecting plate and the second connecting plate have guide grooves inside, and the guide plate is slidably connected inside the guide groove.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, rotating the knob drives the gear and rack mechanism to move the connecting plate one and the connecting plate two and the clamping plate one and the clamping plate two below them, thereby making the clamping plate one and the clamping plate two firmly clamp the wax mold shell and the ceramic inner core, effectively fixing their relative positions, preventing displacement or loosening, enhancing structural stability, and improving the dimensional accuracy and product quality in the casting process from the source.

[0024] 2. In this utility model, the rotating trigger drives the slide bar and the locking block to move, thereby realizing the quick unlocking and repositioning of the docking plate slot, making the clamping plate one and clamping plate two easy to disassemble and replace, adapting to wax mold shells and ceramic cores of different shapes, improving assembly efficiency, and enhancing the compatibility and applicability of the fixing mechanism to parts of multiple specifications. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of a fixing mechanism for a suspended, easily collapsible ceramic core for precision casting proposed in this utility model.

[0026] Figure 2 A schematic diagram of the rack structure of a fixing mechanism for a suspended, easily collapsible ceramic inner core for precision casting proposed in this utility model.

[0027] Figure 3 A schematic diagram of the gear structure of the fixing mechanism for a suspended, easily collapsible ceramic inner core for precision casting proposed in this utility model.

[0028] Figure 4 This is a schematic diagram of the connecting plate of a fixing mechanism for a suspended, easily collapsible ceramic core for precision casting proposed in this utility model.

[0029] Figure 5 This is a schematic diagram of the slide bar structure of a fixing mechanism for a suspended, easily collapsible ceramic inner core for precision casting proposed in this utility model.

[0030] Legend:

[0031] 1. Wax mold shell; 2. Ceramic inner core; 3. Fixed shell; 4. Connecting plate one; 5. Connecting plate two; 6. Clamping plate one; 7. Clamping plate two; 8. Rotating column; 9. Gear; 10. Knob; 11. Support plate; 12. Guide plate; 13. Guide groove; 14. Guide opening; 15. Slide rod; 16. Locking block; 17. Rotating trigger; 18. Baffle; 19. Spring; 20. Connecting plate; 21. Locking groove; 22. Slide plate; 23. Slide groove; 24. Rack. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Reference Figures 1-3 This utility model provides an embodiment of a fixing mechanism for a suspended, easily collapsible ceramic core used in precision casting. The mechanism includes a wax mold shell 1, a ceramic core 2, and a fixing shell 3. The ceramic core 2 is located at the center of the wax mold shell 1. Connecting plates 1-4 and 2-5 are slidably connected to both sides of the fixing shell 3. Clamping and positioning components are installed on the sides of connecting plates 1-4 and 2-5. Clamping plates 1-6 and 2-7 are slidably connected to the bottoms of connecting plates 1-4 and 2-5. Quick-change components are installed inside both connecting plates 1-4 and 2-5. Clamping plates 1-6 and 2-7 are respectively positioned... On the outer sides of the wax mold shell 1 and the ceramic inner core 2, clamping plate 1 (clamping plate 6) clamps and connects the wax mold shell 1, and clamping plate 2 (clamping plate 7) clamps and connects the ceramic inner core 2. The clamping and positioning assembly includes a rack 24, which is fixedly connected to the sides of connecting plate 4 (connecting plate 1) and connecting plate 2 (connecting plate 2). The rack 24 moves synchronously with connecting plate 4 (connecting plate 1) and connecting plate 2 (connecting plate 2). A rotating column 8 is rotatably connected inside the fixed shell 3. A gear 9 and a knob 10 are fixedly connected to the outer side and top of the rotating column 8, respectively. The rack 24 and the gear 9 mesh with each other. By rotating the knob 10, the rotating column 8 and the gear 9 are rotated, causing the gear 9 to push the rack 24 to move. A support plate 11 is fixedly connected to the sides of connecting plate 4 (connecting plate 1) and connecting plate 2 (connecting plate 2) . One side of the support plate 11 is slidably connected to the inside of the rack 24 on the other side, allowing the support plate 11 to slide into the rack 24 and support the movement trajectory of the rack 24.

[0034] Reference Figure 1 , Figure 4 and Figure 5The quick-change assembly includes a slide rod 15, which is slidably connected inside connecting plate 4 and connecting plate 5. The slide rod 15 connects various structures. One end of the slide rod 15 is fixedly connected to a locking block 16, and the other end is rotatably connected to a rotating trigger 17. Pulling the rotating trigger 17 causes the slide rod 15 to control the movement of the locking block 16. Baffles 18 are fixedly connected to the sides of both connecting plate 4 and connecting plate 5, and the slide rod 15 is slidably connected inside the baffles 18, protecting the internal structures of connecting plate 4 and connecting plate 5. A spring 19 is sleeved around the outer periphery of the slide rod 15, positioned between the locking block 16 and the baffles 18. The pressure generated by the interaction between the spring 19 and the baffles 18 causes the locking block 16 to move inward. Both clamping plate 6 and clamping plate 7 are fixedly connected to the top of a mating plate 20. The two mating plates 20 are slidably connected inside connecting plate 4 and connecting plate 5 respectively. Using the mating plates 20, clamping plates 6 and 7 are connected to connecting plate 4 and connecting plate 5. The side of the mating plate 20 is provided with a slot 21. The locking block 16 engages with the slot 21. The locking block 16 moves inward and engages inside the slot 21 to fix the position of clamping plate 6 and clamping plate 7.

[0035] Reference Figures 2-5 A sliding plate 22 is fixedly connected to the top of the docking plate 20. Both the first connecting plate 4 and the second connecting plate 5 have internal grooves 23. The sliding plate 22 is slidably connected inside the grooves 23. The sliding plate 22 and the grooves 23 limit the installation positions of the first clamping plate 6 and the second clamping plate 7. A guide opening 14 is provided inside the fixed shell 3. The rack 24 and the support plate 11 are slidably connected inside the guide opening 14. The guide opening 14 limits the space for the movement of the rack 24 and the support plate 11. A guide plate 12 is fixedly connected to the bottom of the fixed shell 3. Both the first connecting plate 4 and the second connecting plate 5 have internal guide grooves 13. The guide plate 12 is slidably connected inside the guide grooves 13. The cooperation between the guide plate 12 and the guide grooves 13 limits the trajectory of the first connecting plate 4 and the second connecting plate 5 during movement.

[0036] Working principle: Rotating the knob 10 drives the gear 9 to rotate via the rotating column 8. The rotating gear 9 controls the rack 24 to move the connecting plate 4 and the connecting plate 5, so that the clamping plates 6 and 7 installed below them are clamped and fixed to the outside of the wax mold shell 1 and the ceramic inner core 2, respectively. This stabilizes the relative position of the wax mold shell 1 and the ceramic inner core 2, effectively enhances the stability between the wax mold shell 1 and the ceramic inner core 2, and improves the quality of the casting product.

[0037] To reinforce wax mold shells 1 and ceramic inner cores 2 with different shapes, clamps of different shapes, such as clamp 6 and clamp 7, are required. Pulling the rotary trigger 17 causes the slide bar 15 to move outward with the locking block 16, disengaging it from the slot 21 of the docking plate 20. This allows the currently used clamps 6 and 7 to be removed. The clamps 6 and 7 to be replaced are then connected to the connecting plate 4 and connecting plate 5, respectively. Rotating the rotary trigger 17 in the opposite direction causes the slide bar 15 to move inward. Through the pressure applied to the locking block 16 by the spring 19, the locking block 16 moves inward and engages with the slot 21 of the docking plate 20, thus fixing the clamps 6 and 7 in place. This allows for quick replacement of clamps 6 and 7, effectively improving the applicability and compatibility of the fixing mechanism.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fixing mechanism for a suspended, easily collapsible ceramic core for precision casting, comprising a wax mold shell (1), a ceramic core (2), and a fixing shell (3), characterized in that: The ceramic inner core (2) is located at the center of the wax mold shell (1). The two sides of the fixed shell (3) are slidably connected to a connecting plate one (4) and a connecting plate two (5). The sides of the connecting plate one (4) and the connecting plate two (5) are equipped with clamping and positioning components. The bottom of the connecting plate one (4) and the connecting plate two (5) are slidably connected to a clamping plate one (6) and a clamping plate two (7). The inside of the connecting plate one (4) and the connecting plate two (5) is equipped with a quick-change component. The clamping plate one (6) and the clamping plate two (7) are respectively located on the outside of the wax mold shell (1) and the ceramic inner core (2). The clamping and positioning assembly includes a rack (24), which is fixedly connected to the sides of the first connecting plate (4) and the second connecting plate (5). A rotating column (8) is rotatably connected inside the fixed shell (3). A gear (9) and a knob (10) are fixedly connected to the outside and top of the rotating column (8), respectively. The rack (24) meshes with the gear (9).

2. The fixing mechanism for a suspended, easily collapsible ceramic core for precision casting according to claim 1, characterized in that: The side of the connecting plate 1 (4) and the connecting plate 2 (5) are fixedly connected to the support plate (11), and the support plate (11) on one side is slidably connected to the inside of the rack (24) on the other side.

3. The fixing mechanism for a suspended, easily collapsible ceramic core for precision casting according to claim 1, characterized in that: The quick-change assembly includes a slide rod (15), which is slidably connected inside the first connecting plate (4) and the second connecting plate (5). One end of the slide rod (15) is fixedly connected to a locking block (16), and the other end of the slide rod (15) is rotatably connected to a rotating trigger (17). Both the first connecting plate (4) and the second connecting plate (5) are fixedly connected to baffles (18), and the slide rod (15) is slidably connected inside the baffles (18).

4. The fixing mechanism for a suspended, easily collapsible ceramic core for precision casting according to claim 3, characterized in that: A spring (19) is sleeved on the outer periphery of the slide bar (15), and the spring (19) is disposed between the locking block (16) and the baffle (18).

5. The fixing mechanism for a suspended, easily collapsible ceramic core for precision casting according to claim 3, characterized in that: The top of the first clamping plate (6) and the second clamping plate (7) are fixedly connected to the mating plate (20). The two mating plates (20) are slidably connected inside the first connecting plate (4) and the second connecting plate (5). The side of the mating plate (20) is provided with a slot (21), and the locking block (16) is engaged with the slot (21).

6. The fixing mechanism for a suspended, easily collapsible ceramic core for precision casting according to claim 5, characterized in that: The top of the docking plate (20) is fixedly connected to a sliding plate (22). Both the first connecting plate (4) and the second connecting plate (5) have grooves (23) inside. The sliding plate (22) is slidably connected inside the grooves (23).

7. The fixing mechanism for a suspended, easily collapsible ceramic core for precision casting according to claim 2, characterized in that: The fixed shell (3) has a guide opening (14) inside, and the rack (24) and the support plate (11) are slidably connected inside the guide opening (14).

8. The fixing mechanism for a suspended, easily collapsible ceramic core for precision casting according to claim 1, characterized in that: The bottom of the fixed shell (3) is fixedly connected to a guide plate (12). The interior of the first connecting plate (4) and the second connecting plate (5) are both provided with guide grooves (13). The guide plate (12) is slidably connected inside the guide grooves (13).

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