3D printing sand mold structure of complex inner cavity casting
By designing the structure and assembly sequence of the casting and sand mold, the problem of difficult operation during the assembly process of 3D printed sand molds for castings with complex internal cavities was solved, achieving efficient and uniform casting results.
Patent Information
- Application Number
- CN202423170256.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-12-20
AI Technical Summary
In the existing technology, the 3D printed sand molds for complex internal cavity castings are difficult to operate and control during the assembly process, which affects the casting efficiency and quality.
A structure comprising castings and matching sand molds was designed. The castings have cylindrical sidewalls, top walls, and bottom walls. The sand molds include a U-shaped bottom mold, a core, an upper mold, and side molds. They are fixed by limiting posts and bolts to ensure the stability of the sand molds and the uniformity of the casting wall thickness. A reasonable mold assembly sequence is adopted for assembly.
It achieves efficient casting of castings with complex internal cavities, resulting in high precision and quality of castings, improved casting efficiency, and enhanced uniformity of casting wall thickness.
Smart Images
Figure CN223588278U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to foundry equipment technical field, concretely relates to a complex inner chamber castings 3D printing sand mould structure. BACKGROUND
[0002] At present in the production process of casting, with the complexity of product structure is higher and higher, such as complex inner chamber castings in production, due to its complexity, more using counter gravity pouring process to complete the production of qualified castings, and using 3D printing sand mould for casting production, due to the complexity of castings, the sand mould exists in the process of use and is not easy to assemble, is not easy to control and is complex to operate and other problems, influence the efficiency of pouring and the quality of pouring. Therefore, a complex inner chamber castings 3D printing sand mould structure is needed to solve the above technical problems. CONTENT OF UTILITY MODEL
[0003] In view of the above defects of prior art, the utility model provides a complex inner chamber castings 3D printing sand mould structure, including castings and the sand mould matched with the castings, the castings include the cylindrical lateral wall, the upper and lower ends of the cylindrical lateral wall are fixed with matched top wall and bottom wall respectively, the center of top wall and bottom wall is equipped with through -hole one, the cylindrical lateral wall is also equipped with opening, the inner chamber of the inner wall of the cylindrical lateral wall is equipped with a plurality of pipeline cavities one, the inner chamber of the outer wall of the cylindrical lateral wall is equipped with a plurality of pipeline cavities two, the pipeline cavities one and pipeline cavities two are staggered distribution, and the two ends of the pipeline cavities one and pipeline cavities two are respectively penetrated through top wall and bottom wall;The sand mould includes the bottom mould of U shape, the bottom mould is equipped with the sprue, the horizontal bottom wall of the bottom mould is equipped with the inlet of sprue, the two vertical side walls of the bottom mould are all equipped with the outlet of sprue on the opposite surface, the two vertical side walls are all equipped with the through -hole two matched with corresponding through -hole one, and the two through -hole two are all matched with the plug, the bottom mould is equipped with the core matched with the castings, the core is equipped with the cavity, the top of the cavity is equipped with the inlet, and the two ends of the core are respectively fixedly connected with the two vertical side walls, the core is matched with two side moulds and one upper mould, the upper mould includes type one, type two and type three matched in sequence, the lower surface of type one is fixed with module one, the lower surface of type two is fixed with module two, and the lower surface of type three is fixed with module three, module one, module two and module three extend into the core, and the bottom mould, plug, upper mould, side mould and core form the closed sand mould.
[0004] Preferably, the horizontal bottom wall is provided with a sand cleaning port, and the sand cleaning port is matched with a movable block. The movable block is firmly bonded to the horizontal bottom wall.
[0005] Preferably, the inner wall of the two side core corresponds to a plurality of protruding limiting posts I, which are in contact with the outer wall of the core.
[0006] Preferably, the outer wall of the module I and the module II is fixed with a plurality of protruding limiting posts II, which are in contact with the inner wall of the core.
[0007] Preferably, the type I, the type II and the type III are fixed by bolts respectively to prevent the type I, the type II and the type III from being opened during pouring.
[0008] Preferably, the two ends of the core are provided with chills.
[0009] The utility model also includes other components which can make the 3D printing sand mould structure of a complex inner cavity casting normal use, and are all the conventional technical means in the field.
[0010] Working principle: in use, the sand mould is combined (molding), and the molding sequence is as follows:
[0011] 1, first, the movable block 7 is installed with the bottom mould 1, and is firmly bonded to form the sand mould A;
[0012] 2, the sand mould A is placed on the sand box base prepared in advance;
[0013] 3, then, the two side types are installed on the sand mould A respectively to form the sand mould B;
[0014] 4, then, the type II, the type I and the type III are installed on the sand mould B in sequence, and two bolts are used to fasten the type II, the type I and the type III to prevent the type II, the type I and the type III from being opened, and the sand mould C is formed, at this time, the module I, the module II and the module III all extend into the core;
[0015] 5, finally, the two plugs are installed on the through hole two of the sand mould C respectively to form the sand mould D, and the sand mould assembly is completed.
[0016] After the molding is completed, the pouring liquid is injected into the sand mould through the inlet of the pouring gate, and the pouring of the casting can be carried out.
[0017] The utility model has the advantages of reasonable structure, convenient use, efficient pouring operation for complex inner cavity castings, high precision, good quality and high efficiency of the castings poured by the sand mould. Attached Figure Description
[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0019] Figure 1 This is a schematic diagram of a 3D-printed sand mold structure for a complex internal cavity casting according to an embodiment of the present invention;
[0020] Figure 2 for Figure 1 Exploded view;
[0021] Figure 3 This is a three-dimensional view of a 3D-printed sand mold structure for a complex internal cavity casting.
[0022] Figure 4 for Figure 1 Schematic diagram of the middle runner and core;
[0023] Figure 5 for Figure 1 Schematic diagram of the intermediate gating system;
[0024] Figure 6 This is a diagram showing the distribution of chills on the core.
[0025] Figure 7 This is a schematic diagram of the casting.
[0026] In the diagram: 1. Bottom mold; 2. Through hole two; 3. Side mold; 4. Mold three; 5. Mold two; 6. Mold one; 7. Loose block; 8. Module two; 9. Plug; 10. Sprue; 11. Chill; 12. Core; 13. Casting; 14. Inlet; 15. Outlet; 16. Inlet; 17. Module three; 18. Module one; 19. Limiting post two; 20. Limiting post one. Detailed Implementation
[0027] The present invention will now be clearly described with reference to the accompanying drawings and specific embodiments. This description is merely for explaining the present invention and is not intended to limit it. Any modifications, equivalent substitutions, improvements, etc., made by those skilled in the art based on the embodiments of the present invention without inventive effort to obtain all other embodiments should be included within the protection scope of the present invention.
[0028] Example
[0029] like Figures 1-7The utility model provides a kind of complex inner cavity casting 3D printing sand mould structure, including casting 13 and the sand mould matched with casting 13, the casting 13 includes cylindrical sidewall, the upper and lower ends of the cylindrical sidewall are respectively fixed with matched top wall and bottom wall, the center of the top wall and bottom wall is equipped with through-hole one, opening is also equipped on the cylindrical sidewall, the inner cavity of inner wall close to in the cylindrical sidewall is equipped with 31 pipeline cavities one, the inner cavity of outer wall close to in the cylindrical sidewall is equipped with 32 pipeline cavities two, the pipeline cavity one and pipeline cavity two are staggered distribution each other, the both ends of the pipeline cavity one and pipeline cavity two are respectively penetrated top wall and bottom wall;The sand mould includes U-shaped bottom mould 1, the bottom mould 1 is equipped with sprue 10, the horizontal bottom wall of the bottom mould 1 is equipped with the inlet 14 of sprue 10, the face of the two vertical sidewalls of bottom mould 1 is equipped with the outlet 15 of sprue 10, and the two vertical sidewalls are equipped with the through-hole two 2 matched with corresponding through-hole one, and the two through-hole two 2 are matched with plug 9, the bottom mould 1 is equipped with the core 12 matched with casting 13, the core 12 is equipped with cavity, the top of the cavity is equipped with inlet 16, and the both ends of the core 12 are respectively fixedly connected with two vertical sidewalls, and the core 12 is matched with two side moulds 3 and one upper mould, the upper mould includes type one 6, type two 5 and type three 4 sequentially matched, the lower surface of type one 6 is fixed with module one 18, the lower surface of type two 5 is fixed with module two 8, and the lower surface of type three 4 is fixed with module three 17, and module one 18, module two 8 and module three 17 extend into the core 12, and the bottom mould 1, plug 9, upper mould, side mould 3 and core 12 form the closed sand mould.
[0030] The horizontal bottom wall is equipped with sand cleaning mouth, the sand cleaning mouth is matched with movable block 7, after the bottom mould and core 3D printing are formed, the sand cleaning mouth is convenient to remove the extra broken sand, then movable block 7 is sealed and bonded and fixed to the sand cleaning mouth.
[0031] The inner wall of the two side moulds 3 corresponding core 12 is fixed with a plurality of protruding limit posts one 20, and the limit post one 20 is in contact with the outer wall of the core 12. When the sand mould is installed, the limit post one 20 in contact with the outer wall of the core 12 can limit the core 12, improve the stability of the sand mould, and also make the wall thickness of the cast casting 13 more uniform.
[0032] The outer wall of the module one 18 and the module two 8 is fixed with a plurality of protruding limit posts two 19, and the limit post two 19 is in contact with the inner wall of the core 12. When the sand mould is installed, the limit post two 19 in contact with the inner wall of the core 12 cooperates with the limit post one 20 to limit the core 12, which can ensure the uniform wall thickness of the casting 13.
[0033] The type one 6, the type two 5 and the type three 4 are fixed by bolts respectively, so as to prevent the type one 6, the type two 5 and the type three 4 from being opened during casting.
[0034] The core 12 is provided with a chill 11 at both ends.
[0035] Working principle: when in use, the sand mold is combined (molding), and the combination sequence is as follows:
[0036] 1, first, the movable block 77 is installed with the bottom mold 11, and the installation is firm and adhesive, so as to form the sand mold A;
[0037] 2, the sand mold A is placed on the sand box base prepared in advance, so as to ensure that the sand consumption of the two sides of the sand box base is greater than or equal to 100 mm;
[0038] 3, then, the two side molds 3 are installed on the sand mold A respectively, so as to form the sand mold B;
[0039] 4, then, the type two 5, the type one 6 and the type three 4 are installed on the sand mold B in sequence, and the type two 5, the type one 6 and the type three 4 are fastened by two bolts, so as to prevent the type two 5, the type one 6 and the type three 4 from being opened, and to form the sand mold C, at this time, the module one 18, the module two 8 and the module three 17 all extend into the core 12;
[0040] 5, finally, the two plugs are installed on the through hole two 2 of the sand mold C respectively, so as to form the sand mold D, and the sand mold assembly is completed.
[0041] After the molding is completed, the casting liquid is injected into the sand through the inlet 14 of the sprue 10, so as to cast the casting 13. The two vertical side walls of the bottom mold 1 are provided with the outlet 15 of the sprue 10 on the opposite surfaces, so as to simultaneously cast into the sand mold, further improve the casting efficiency and effect, and make the casting more uniform.
[0042] The above has described the embodiments of the utility model, the above description is exemplary, is not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. Any modification, equivalent replacement and improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. A 3D-printed sand mold structure for a complex internal cavity casting, comprising a casting and a sand mold matching the casting, wherein the casting includes a cylindrical sidewall, and matching top and bottom walls are fixed to the upper and lower ends of the cylindrical sidewall, respectively. A through hole is provided at the center of both the top and bottom walls. An opening is also provided on the cylindrical sidewall. Multiple pipe cavities are provided in the inner cavity near the inner wall of the cylindrical sidewall, and multiple pipe cavities are provided in the inner cavity near the outer wall of the cylindrical sidewall. The pipe cavities are staggered, and the two ends of each pipe cavity penetrate the top and bottom walls, respectively. The characteristic feature is that: The sand mold includes a U-shaped bottom mold with a gating system inside. The horizontal bottom wall of the bottom mold has a gating system inlet, and the two vertical side walls of the bottom mold each have a gating system outlet on their facing surfaces. Each of the two vertical side walls has a corresponding through-hole (II) that matches through-hole one. Both through-holes (II) are fitted with plugs. The bottom mold has a core that matches the casting. The core has a cavity inside, with an inlet at the top. Both ends of the core are fixedly connected to the two vertical side walls. The core is fitted with two side molds and one top mold. The top mold includes mold one, mold two, and mold three, which are fitted sequentially. Module one is fixed to the lower surface of mold one, module two is fixed to the lower surface of mold two, and module three is fixed to the lower surface of mold three. Modules one, two, and three extend into the core. The bottom mold, plugs, top mold, side molds, and core form the sand mold.
2. The 3D printing sand mold structure for a complex internal cavity casting according to claim 1, characterized in that: The horizontal bottom wall is provided with a sand-cleaning port, and the sand-cleaning port is fitted with a movable block.
3. The 3D printing sand mold structure for a complex internal cavity casting according to claim 1, characterized in that: Multiple protruding limiting posts are fixed on the inner walls of the two corresponding side cores, and the limiting posts are in contact with the outer walls of the cores.
4. The 3D printing sand mold structure for a complex internal cavity casting according to claim 1, characterized in that: Multiple protruding limiting posts are fixed on the outer walls of both module one and module two, and the limiting posts are in contact with the inner wall of the core.
5. The 3D printing sand mold structure for a complex internal cavity casting according to claim 1, characterized in that: Type 1, Type 2 and Type 3 are respectively fixed together by bolts.