CN217912771U

CN217912771U - Investment casting mould

Info

Publication number: CN217912771U
Application number: CN202222013119.5U
Authority: CN
Inventors: 苏英; 虞福平; 朱萍; 申武勇; 袁世杰
Original assignee: Suzhou Paul Machinery Engineering Co ltd
Current assignee: Suzhou Paul Machinery Engineering Co ltd
Priority date: 2022-08-01
Filing date: 2022-08-01
Publication date: 2022-11-29
Anticipated expiration: 2032-08-01

Abstract

The application discloses investment casting mould relates to investment casting technical field, including the shell, be equipped with the chill on the shell, the chill is installed on the shell, the chill is connected with cooling system, cooling system is used for adjusting the temperature of chill. This application passes through cooling system and adjusts the chill temperature that acts on different hot festival positions, and the solidification rate at indirect control hot festival position makes the molten metal in the shell as far as possible even solidification, reduces the shrinkage cavity phenomenon, improves foundry goods quality.

Description

Investment casting mould

Technical Field

The application relates to the technical field of investment casting, in particular to an investment casting mold.

Background

In the investment casting process, molten metal at the thick wall of a casting is slowly radiated to form a hot spot part, and a shrinkage cavity is formed at the hot spot part due to insufficient feeding.

The process of investment casting mainly comprises the procedures of wax melting, molten metal casting, post-treatment and the like, the external chill is an important structure for solving the defect of the internal shrinkage cavity of the pole piece, the external chill is arranged in a shell integrated in a designated area of a wax mould, the molten metal is cast again at the moment, the cooling speed of the molten metal covered with the position of the external chill is faster, the differentiated cooling speed is formed, and the shrinkage cavity condition of a hot spot part is relieved.

At present, a common investment casting locally cooled by an external chiller comprises a casting shell and the external chiller, wherein the external chiller is arranged on the shell. And during pouring, the air blowing or water cooling mode is adopted to forcibly cool the cold iron part exposed outside the die, so that the aim of accelerating the solidification of the molten metal at the hot spot part of the casting is fulfilled.

In view of the above technical solutions, the inventors found that the required temperature for the external chill is different due to the different thicknesses of the hot spot portions of the castings. Above-mentioned scheme is when the pouring, concentrates the cooling through blowing or water-cooled mode to outer chill, and the outer chill cooling speed of different positions is the same, still exists the shrinkage cavity condition easily.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that the temperatures of external chillers at different hot spot positions of a casting are the same, the application provides an investment casting mold.

The application provides a investment casting mould adopts following technical scheme:

the utility model provides an investment casting mould, includes the shell, be equipped with the chiller on the shell, can dismantle on the chiller and be connected with cooling system, cooling system carries out the temperature control system that circulated, is used for controlling circulation system operation including being used for carrying cooling medium.

Through adopting above-mentioned technical scheme, can additionally assemble cooling system fast on the chiller, the chiller is connected with cooling system, wherein circulation system forms holistic refrigerant circulation, make the chiller take away the heat through the refrigerant, promote cooling rate, in addition, adjust the chiller temperature at different hot spot positions through temperature control system, make the chiller temperature inconsistent at different positions, reach the effect of differentiation cooling, indirectly improve the solidification rate at the hot spot position of different positions, make the metal liquid in the shell as far as possible even solidification, reduce the shrinkage cavity phenomenon, improve the foundry goods quality.

In a specific possible embodiment: the cold iron inner circle is provided with a refrigerant channel, the cold iron is provided with an inlet connector and an outlet connector, and the inlet connector and the outlet connector are communicated with the refrigerant channel.

By adopting the technical scheme, the refrigerant channel is arranged in the chiller, the cooling medium enters the chiller through the inlet joint, the chiller is cooled, and then the chiller flows out of the outlet joint. In the process, the cooling medium flows in the chiller, so that the temperature of the chiller is more uniform; the refrigerant channel is spirally arranged in the chiller, so that the detention time of a cooling medium flowing in the chiller is prolonged, the cooling volume in the chiller is large, the coverage is wide, and the integral cooling effect of the chiller is improved.

In a specific possible embodiment: the circulating system comprises a circulating pump, a cooler and a cooling medium container, an outlet of the circulating pump is communicated with the inlet joint, an inlet of the cooler is communicated with the outlet joint, and an inlet of the circulating pump and an outlet of the cooler are both communicated with the cooling medium container.

Through adopting above-mentioned technical scheme, coolant holds in the coolant container, and the circulation flows between chiller and cooler under the effect of circulating pump, realizes the cooling effect to the chiller because the continuous operation of circulating pump compares traditional blowing, and the cooling effect is better, and can realize the different velocity of flow of coolant with the help of the circulating pump, reaches the effect of differentiation cooling.

In a specific possible embodiment: the inlet joint with the outlet joint is equipped with the external screw thread, the export of circulating pump is equipped with first connector, the import of cooler is equipped with the second connector, first connector and inlet joint threaded connection, second connector and outlet joint threaded connection.

Through adopting above-mentioned technical scheme, adopt threaded connection's mode to insert cooling system with the chiller, the installation and the dismantlement of the chiller of being convenient for.

In a specific possible embodiment: and a flow valve is arranged between the circulating pump and the first connecting head.

By adopting the technical scheme, the flow rate of the cooling medium in the chiller at different parts is adjusted through the flow valve, so that the effect of adjusting the temperature of the chiller at different parts is realized

In a specific possible embodiment: the temperature control system is electrically connected with the circulating pump and is a PLC or a single chip microcomputer.

By adopting the technical scheme, the temperature control system controls the power of the circulating pump, namely the flow velocity of the cooling medium can be controlled, and the differential cooling of the cold iron is realized under the condition of variable flow velocity.

In a specific possible embodiment: the shell is provided with an installation opening, and the chill is embedded in the installation opening.

By adopting the technical scheme, the mounting hole is formed in the shell, the chilling block is embedded in the mounting hole, the chilling block can be prevented from moving on the shell as far as possible, and the casting quality is improved.

In a specific possible embodiment: the cold iron is provided with a boss, a positioning table matched with the boss is arranged in the mounting hole, the boss is clamped with the positioning table, and the height of the boss is the same as the thickness of the positioning table.

Through adopting above-mentioned technical scheme, because the chill is through in the installing port embedding die shell, through location platform and boss block, when embedding the chill into the installing port, can avoid the chill to insert the die shell degree of depth too big as far as possible, so location platform and boss have spacing effect.

In a specific possible embodiment: and the chilling block and the mounting port are sealed through a sealant.

By adopting the technical scheme, because the metal liquid is required to be injected into the cavity in the shell when the casting is poured, the gap between the chilling block and the shell is sealed by the sealant, and the metal liquid can be prevented from seeping out as much as possible.

In summary, the present application at least includes one advantageous technical effect:

1. the cooling system is used for adjusting the temperature of the chilling blocks at different hot spot positions and indirectly controlling the solidification speed of the hot spot positions, so that the molten metal is uniformly solidified in the shell as much as possible, the shrinkage phenomenon is reduced, and the quality of the casting is improved.

2. And the chiller is connected into the cooling system in a threaded connection mode, so that the chiller can be conveniently mounted and dismounted.

Drawings

FIG. 1 is a schematic overall structure diagram of an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a shell embodying the present application;

FIG. 3 is a cross-sectional view of an embodiment of the present application for embodying a chiller;

FIG. 4 is a block diagram of an embodiment of the present application for embodying a cooling system.

Description of reference numerals:

1. a shell; 11, a mounting port; 12. a positioning table; 2. performing iron cooling; 21. a refrigerant channel; 22. an inlet fitting; 23. an outlet connection; 24. a boss; 3. a cooling system; 31. a circulation pump; 32. a cooler; 33. a first connection head; 34. a flow valve; 35. a cooling medium container; 36. a second connector; 4. and (4) a pouring gate.

Detailed Description

The present application is described in further detail below with reference to the attached drawings.

The application discloses an investment casting mould, referring to fig. 1, the investment casting mould comprises a shell 1 and a pouring gate 4 connected above the shell 1, and molten metal enters the shell 1 through the pouring gate 4. The shell 1 is embedded with a chiller 2, the chiller 2 is communicated with the inner cavity of the shell 1, and the chiller 2 is connected with a cooling system 3. The cooling system 3 comprises a circulating system and a temperature control system, the temperature of the chiller 2 at the hot spot part can be taken away through the circulating system, the flow speed of a cooling medium in the circulating system can be controlled through the temperature control system, the temperature of the chiller 2 is differentiated, and the cooling speed achieves the differentiated effect.

The chilling block 2 and the shell 1 are sealed through industrial sealant, the sealant can be made of refractory mortar and other high-temperature-resistant materials, and the relative sealing performance of the joint of the shell 1 and the chilling block 2 is improved.

Referring to fig. 2, a mounting opening 11 is formed in a shell 1, a positioning table 12 is fixedly connected in the mounting opening 11, the positioning table 12 forms a stepped surface relative to the mounting opening 11, and a boss 24 engaged with the positioning table 12 is fixedly connected to the chiller 2. When the chilling block 2 is embedded on the shell 1, the positioning table 12 and the boss 24 are mutually clamped, so that the chilling block 2 can be prevented from being excessively inserted into the shell 1 as much as possible, and the position positioning of the chilling block 2 is realized.

Referring to fig. 2 and 3, an inlet joint 22 and an outlet joint 23 are fixedly connected to the surface of the chiller 2 exposed outside the shell 1, a refrigerant channel 21 is reserved inside the chiller 2, the refrigerant channel 21 is integrally and reciprocally coiled inside the chiller 2 to cover each position of the chiller 2, an inlet of the refrigerant channel 21 is communicated with the inlet joint 22, and an outlet of the refrigerant channel 21 is communicated with the outlet joint 23. The cooling medium enters the interior of the chiller 2 through the inlet joint 22, and flows out of the chiller 2 through the outlet joint 23 after the chiller 2 is cooled.

Referring to fig. 2 and 4, the cooling system 3 includes a cooling medium container 35, a circulation pump 31, and a cooler 32, the circulation pump 31 and the cooler 32 are fixedly installed above the cooling medium container 35, and an inlet of the circulation pump 31 and an outlet of the cooler 32 are both communicated with the cooling medium container 35. The outlet of the circulating pump 31 is fixedly connected with a first connector 33, and the first connector 33 is in threaded connection with the inlet connector 22 (see fig. 1); the inlet of the cooler is fixedly connected with a second connector 36, and the second connector 36 is in threaded connection with the outlet connector 23 (refer to fig. 1). Under the action of the circulating pump 31, the cooling medium flows out from the cooling medium container 35, then enters the chiller 2, cools the chiller 2 through the cooler 32, and finally flows into the cooling medium container 35. A flow valve 34 is connected in series between the circulating pump 31 and the first connecting joint 33, and the current medium flow rate is obtained through the flow valve 34 and is adaptively adjusted, so that the effect of controlling the temperature of the chiller 2 is achieved.

Wherein, temperature control system is connected with circulating pump 31 electricity, and temperature control system adopts PLC or the singlechip in the next machine, through the power of the steerable circulating pump 31 of temperature control system, behind circulating pump 31's power regulation, has adjusted the velocity of flow of coolant promptly, also can realize the differentiation adjustment to the cooling of chiller 2.

The working principle of the embodiment is as follows: molten metal enters the shell 1 through the pouring hole 4, the chilling blocks 2 are embedded in different hot spot positions of the shell 1, and when the molten metal is solidified in the shell 1, the temperature of the chilling blocks 2 at different positions is controlled through the cooling system 3, so that the solidification speed of the molten metal in the shell 1 is controlled, the molten metal in the shell 1 is uniformly solidified as much as possible, the shrinkage cavity defect is reduced, and the casting quality is improved.

The above description is only the preferred embodiment of the present application, the protection scope of the present application is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention all belong to the protection scope of the present application. It should be noted that modifications and embellishments within the scope of the present disclosure may be made by those skilled in the art without departing from the principles of the present disclosure.

Claims

1. The utility model provides an investment casting mould, includes shell (1), be equipped with chill (2) on shell (1), characterized by: the chilling block (2) is detachably connected with a cooling system (3), and the cooling system (3) comprises a circulating system for conveying a cooling medium to circulate and a temperature control system for controlling the circulating system to run.

2. The investment casting mold of claim 1, wherein: the cooling iron (2) is internally provided with a refrigerant channel (21) in a spiral mode, the cooling iron (2) is provided with an inlet connector (22) and an outlet connector (23), and the inlet connector (22) and the outlet connector (23) are communicated with the refrigerant channel (21).

3. The investment casting mold of claim 2, wherein: the circulating system comprises a circulating pump (31), a cooler (32) and a cooling medium container (35), an outlet of the circulating pump (31) is communicated with an inlet joint (22), an inlet of the cooler (32) is communicated with an outlet joint (23), and an inlet of the circulating pump (31) and an outlet of the cooler (32) are both communicated with the cooling medium container (35).

4. The investment casting mold of claim 3, wherein: the utility model discloses a cooling device, including inlet joint (22), outlet joint (23), circulating pump (31), import connector (22) with outlet joint (23) is equipped with the external screw thread, the export of circulating pump (31) is equipped with first connector (33), the import of cooler (32) is equipped with second connector (36), first connector (33) and inlet joint (22) threaded connection, second connector (36) and outlet joint (23) threaded connection.

5. The investment casting mold of claim 4, wherein: and a flow valve (34) is arranged between the circulating pump (31) and the first connecting head (33).

6. The investment casting mold of claim 3, wherein: the temperature control system is electrically connected with the circulating pump and is a PLC or a single chip microcomputer.

7. The investment casting mold of claim 1, wherein: the shell (1) is provided with an installation opening (11), and the chilling block (2) is embedded in the installation opening (11).

8. The investment casting mold of claim 7, wherein: be equipped with boss (24) on chill (2), be equipped with in installing port (11) with boss (24) matched with location platform (12), boss (24) with location platform (12) block, boss (24) height with location platform (12) thickness is the same.

9. The investment casting mold of claim 8, wherein: the chilling block (2) and the mounting port (11) are sealed through a sealant.