Mold structure for casting centrifuges

Abstract

This utility model discloses a mold structure for casting centrifuges, including a main shaft mold, a main shaft mold cavity disposed on the main shaft mold, and an inner mold disposed within the main shaft mold cavity. The main shaft mold cavity has an open opening. The main shaft mold cavity includes a conical cavity and a cylindrical expansion cavity communicating with the open opening. The inner mold includes a conical segment that cooperates with the conical cavity and a cylindrical segment that cooperates with the cylindrical expansion cavity. It also includes a mold closing core positioning structure for positioning the inner mold and the main shaft mold. Compared with the prior art, this utility model can facilitate demolding and installation, which not only improves the casting efficiency but also further improves the casting quality.

Description

Technical Field

[0001] This utility model belongs to the field of casting centrifuge technology, specifically relating to a mold structure for casting centrifuges. Background Technology

[0002] Centrifugal casting equipment includes demolding structures and procedures. Chinese invention patent application CN202411783279.5, entitled "An Automatic Centrifugal Casting Equipment and Casting Process," discloses an inner mold separation device. This device consists of clamping devices symmetrically arranged on both sides of a base 1. Each clamping device comprises a gripper, a gripper control cylinder, a gripper moving platform, and a moving platform control cylinder 31. The gripper is composed of symmetrically arranged mechanical clamps. Simply put, the structure utilizes a control cylinder via a connecting rod to control the up-and-down movement of the gripper, thus achieving demolding. However, in actual work, we have found that demolding the inner mold and outer mold (spindle mold) is quite difficult, since after the molten steel solidifies, the inner and outer molds are essentially fixed together. Utility Model Content

[0003] The technical problem to be solved and the shortcomings of the existing technology are addressed by this utility model, which aims to provide a mold structure for casting centrifuges. This structure overcomes the shortcomings of the existing technology, facilitates demolding and installation, and not only improves the efficiency of casting but also further enhances the quality of casting.

[0004] Technical solution

[0005] To solve the above-mentioned technical problems, this utility model provides a mold structure for casting centrifuges, including a main shaft mold, a main shaft mold cavity disposed on the main shaft mold, and an inner mold disposed within the main shaft mold cavity. The main shaft mold cavity has an open opening. The main shaft mold cavity includes a conical cavity and a cylindrical expansion cavity communicating with the open opening. The inner mold includes a conical segment that cooperates with the conical cavity and a cylindrical segment that cooperates with the cylindrical expansion cavity. It also includes a mold closing core positioning structure for positioning the inner mold and the main shaft mold.

[0006] As a further preferred technical solution of this utility model; the mold closing core positioning structure includes a boss on the end face of the conical cavity, a mounting groove located outside the boss, a positioning groove on the end face of the conical cavity that cooperates with the boss, and a positioning protrusion that cooperates with the mounting groove. The boss includes a boss end face, an inner inclined surface of the boss, and an outer inclined surface of the boss. The positioning groove includes a positioning groove bottom face, an inner inclined surface of the positioning groove, and an outer inclined surface of the positioning groove. The boss end face and the positioning groove bottom face are in contact with each other. The outer inclined surface of the boss and the outer inclined surface of the positioning groove are in contact with each other. There is a first expansion gap between the inner inclined surface of the boss and the inner inclined surface of the positioning groove.

[0007] As a further preferred technical solution of this utility model, there is a second expansion gap between the bottom surface of the mounting groove and the top surface of the positioning protrusion.

[0008] As a further preferred technical solution of this utility model, there is a third expansion gap between the outer side of the positioning protrusion and the inner surface of the cylindrical expansion cavity.

[0009] As a further preferred technical solution of this utility model; the bottom of the conical cavity is provided with an inner mold fixing plate, the inner mold fixing plate is provided with a bottom protrusion, and the top surface of the conical section is provided with a top groove that cooperates with the bottom protrusion.

[0010] As a further preferred technical solution of this utility model; the bottom protrusion includes a top surface of the bottom protrusion, an outer side surface of the top protrusion, and an inner side surface of the top protrusion, and the top groove includes a bottom surface of the top groove, an outer side surface of the top groove, and an inner side surface of the top groove; there is a fourth expansion gap between the outer side surface of the top protrusion and the outer side surface of the top groove.

[0011] As a further preferred technical solution of this utility model; there is a fifth expansion gap between the top surface of the bottom protrusion and the bottom surface of the top groove; there is a sixth expansion gap between the inner side surface of the protrusion and the inner side surface of the top groove.

[0012] As a further preferred technical solution of this utility model, a seventh expansion gap is formed between the surface of the inner mold fixing plate and the top surface of the conical segment located outside the top groove.

[0013] As a further preferred technical solution of this utility model, an eighth expansion gap is formed between the conical cavity and the conical segment.

[0014] As a further preferred technical solution of this utility model, the boss and the bottom protrusion are both ring structures with a trapezoidal cross-section.

[0015] Beneficial effects

[0016] Compared with existing technologies, this invention facilitates demolding and installation, which not only improves the efficiency of casting but also further enhances the quality of casting. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the main shaft mold in this utility model;

[0019] Figure 3 for Figure 1 A magnified view of part A;

[0020] Figure 4 for Figure 1 A magnified view of part B. Detailed Implementation

[0021] This specific embodiment is a mold structure for casting centrifuges, and its structural schematic diagram is shown below. Figures 1-4 As shown, the mold structure for casting centrifuges includes a main shaft mold 1, a main shaft mold cavity 2 disposed on the main shaft mold 1, and an inner mold 3 disposed within the main shaft mold cavity 2. The main shaft mold cavity 2 has an opening 201. Since these are existing technologies, they will not be described in detail here. In actual production, the applicant found that one problem was difficulty in demolding after casting. More importantly, the quality of the cast products still had room for improvement. Therefore, the applicant spent time and effort conducting research and discovered that, due to the high temperature of the molten steel, the inner mold expands after heating. After cooling, the main shaft mold and the inner mold 3 are essentially tightly bound together. The fact that the two parts are fixed together makes demolding difficult, and the expansion of the inner mold when heated by the molten steel also affects the quality of the cast product. To address this, the applicant has improved the mold structure. Specifically, the main spindle mold cavity 2 includes a conical cavity 202 and a cylindrical expansion cavity 203 communicating with the open opening 201. The inner diameter of the cylindrical expansion cavity 203 is larger than the larger end of the inner diameter of the conical cavity 202. The inner mold 3 includes a conical section 301 that mates with the conical cavity 202 and a cylindrical section 302 that mates with the cylindrical expansion cavity 203. In addition, it also includes a mold closing core positioning structure 4 for positioning the inner mold 3 and the main spindle mold 1.

[0022] In an embodiment of the present invention, the mold closing core positioning structure 4 includes a boss 401 on the end face of the conical cavity 202, a mounting groove 402 located outside the boss 401, a positioning groove 403 on the end face of the conical cavity 202 that mates with the boss 401, and a positioning protrusion 404 that mates with the mounting groove 402. The boss 401 includes a boss end face 4011, an inner inclined surface 4012, and an outer inclined surface 4013. The positioning groove 403 includes a positioning groove. The structure includes a bottom surface 4031, an inner inclined surface 4032 of the positioning groove, and an outer inclined surface 4033 of the positioning groove. The end face 4011 of the boss fits into the bottom surface 4031 of the positioning groove, and the outer inclined surface 4013 of the boss fits into the outer inclined surface 4033 of the positioning groove. A first expansion gap 404a exists between the inner inclined surface 4012 of the boss and the inner inclined surface 4032 of the positioning groove. Preferably, the boss is a ring-shaped structure with a trapezoidal cross-section, which fits into the positioning groove 403. The mounting groove 402 cooperates with the positioning protrusion 404 because the end face 4011 of the protrusion and the bottom face 4031 of the positioning groove are in contact, and the outer inclined surface 4013 of the protrusion and the outer inclined surface 4033 of the positioning groove are in contact. This allows the inner mold 3 and the main shaft mold 1 to be easily positioned and facilitates installation. More importantly, based on this, there is a first expansion gap 404a between the inner inclined surface 4012 of the protrusion and the inner inclined surface 4032 of the positioning groove. Furthermore, the mounting groove... There is a second expansion gap 405 between the bottom surface of 402 and the top surface of the positioning protrusion 404. Furthermore, there is a third expansion gap 406 between the outer side of the positioning protrusion 404 and the inner surface of the cylindrical expansion cavity 203. The existence of the first expansion gap, the second expansion gap and the third expansion gap can leave a corresponding deformation space for the inner mold after the inner mold 3 and the main shaft mold 1 can be positioned, so that the casting of molten steel can be carried out. This makes it easy to demold after casting and can also ensure the quality of the casting product.

[0023] Furthermore, in this embodiment, the bottom of the conical cavity 202 is provided with an inner mold fixing plate 5, which is fixed by known methods such as screw fixing. The inner mold fixing plate 5 is provided with a bottom protrusion 601, and the top surface of the conical section 301 is provided with a top groove 602 that cooperates with the bottom protrusion 501. The bottom protrusion 601 includes a bottom protrusion top surface 6011, a top protrusion outer surface 6012, and a top protrusion inner surface 6013. The top groove 602 includes a top groove bottom surface 6021, a top groove outer surface 6022, and a top groove inner surface 6023. There is a fourth expansion gap 603 between the top protrusion outer surface 6012 and the top groove outer surface 6022. Furthermore, the bottom protrusion top surface 6011 and the top groove bottom surface 6023 are connected by a fourth expansion gap 603. There is a fifth expansion gap 604 between 021; there is a sixth expansion gap 605 between the inner side surface of the protrusion 6013 and the inner side surface of the top groove 6023; a seventh expansion gap 606 is formed between the surface of the inner mold fixing plate 5 and the top surface of the conical segment 301 located outside the top groove 602; an eighth expansion gap 607 is formed between the conical cavity 202 and the conical segment 301; at the same time, the bottom protrusion is a ring structure with a trapezoidal cross-section. The existence of the fourth, fifth, sixth, seventh, and eighth expansion gaps allows for the provision of corresponding deformation space for the inner mold after the inner mold 3 and the main shaft mold 1 are positioned, which facilitates demolding after casting and ensures the quality of the cast product.

[0024] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A mold structure for casting a centrifuge, comprising a main shaft mold (1), a main shaft mold cavity (2) provided on the main shaft mold (1), and an inner mold (3) provided in the main shaft mold cavity (2), the main shaft mold cavity (2) being provided with an open mouth (201); characterized in that: The main spindle mold cavity (2) includes a conical cavity (202) and a cylindrical expansion cavity (203) communicating with the opening (201). The inner mold (3) includes a conical section (301) that cooperates with the conical cavity (202) and a cylindrical section (302) that cooperates with the cylindrical expansion cavity (203). It also includes a mold closing core positioning structure (4) for positioning the inner mold (3) and the main spindle mold (1).

2. A mold structure for a casting centrifuge according to claim 1, characterized in that: The mold closing core positioning structure (4) includes a boss (401) on the end face of the conical cavity (202), a mounting groove (402) located outside the boss (401), a positioning groove (403) on the end face of the conical cavity (202) that mates with the boss (401), and a positioning protrusion (404) that mates with the mounting groove (402). The boss (401) includes a boss end face (4011), an inner inclined surface (4012), and an outer inclined surface (4013). 3) The positioning groove (403) includes a bottom surface (4031), an inner inclined surface (4032), and an outer inclined surface (4033). The end face (4011) of the boss and the bottom surface (4031) of the positioning groove are in contact with each other. The outer inclined surface (4013) of the boss and the outer inclined surface (4033) of the positioning groove are in contact with each other. There is a first expansion gap (404a) between the inner inclined surface (4012) of the boss and the inner inclined surface (4032) of the positioning groove.

3. A mold structure for a casting centrifuge according to claim 2, characterized in that: There is a second expansion gap (405) between the bottom surface of the mounting groove (402) and the top surface of the positioning protrusion (404).

4. A mold structure for a casting centrifuge according to claim 2, characterized in that: There is a third expansion gap (406) between the outer side of the positioning protrusion (404) and the inner surface of the cylindrical expansion cavity (203).

5. A mould structure for a casting centrifuge according to claim 2 or 3 or 4, characterised in that: The conical cavity (202) has an inner mold fixing plate (5) at the bottom, and the inner mold fixing plate (5) has a bottom protrusion (601). The top surface of the conical section (301) has a top groove (602) that matches the bottom protrusion (601).

6. A mold structure for a casting centrifuge according to claim 5, characterized in that: The bottom protrusion (601) includes a top surface (6011), an outer surface (6012), and an inner surface (6013) of the top protrusion; the top groove (602) includes a bottom surface (6021), an outer surface (6022), and an inner surface (6023) of the top groove; there is a fourth expansion gap (603) between the outer surface (6012) of the top protrusion and the outer surface (6022) of the top groove.

7. A mold structure for a casting centrifuge according to claim 6, characterized in that: There is a fifth expansion gap (604) between the top surface of the bottom protrusion (6011) and the bottom surface of the top groove (6021); there is a sixth expansion gap (605) between the inner surface of the protrusion (6013) and the inner surface of the top groove (6023).

8. A mold structure for a casting centrifuge according to claim 7, characterized in that: A seventh expansion gap (606) is formed between the surface of the inner mold fixing plate (5) and the top surface of the tapered section (301) located outside the top groove (602).

9. A mold structure for a casting centrifuge as defined in claim 1, wherein: An eighth expansion gap (607) is formed between the conical cavity (202) and the conical section (301).

10. A mold structure for a casting centrifuge as defined in claim 5, wherein: The boss (401) and the bottom bump (601) are annular structures with trapezoidal cross sections.

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