Slurry stirrer for investment casting

Abstract

The utility model discloses a slurry stirrer for investment casting, which comprises a stirring tank, a raw material chamber and a silica sol storage chamber, the raw material chamber is connected with the stirring tank through a feeding mechanism, a three-way valve is arranged between the silica sol storage chamber and the stirring tank, and a delivery pump is arranged between the three-way valve and the stirring tank. A three-way valve is arranged in the stirring cavity, two ends of the three-way valve are respectively connected with the silica sol storage chamber and the stirring tank through conveying pipes, and the other end of the three-way valve is connected with an external cleaning pipe. The conveying pipe and the stirring cavity can be cleaned through the external cleaning pipe, so that the silica sol in the conveying pipe is prevented from being remained, and the silica sol is prevented from being dried and solidified in the pipeline to cause blockage or pollute the quality of subsequent silica sol; according to the device, the three-way valve cleaning system, the spiral feeding mechanism and the silica sol spraying structure are integrated, accurate matching, efficient mixing and convenient cleaning are achieved, and the slurry quality and the production efficiency are improved.

Description

Technical Field

[0001] This utility model relates to the field of casting equipment technology, and in particular to a slurry mixer for investment casting. Background Technology

[0002] In the investment casting industry, silica sol coatings are made by mixing silica sol adhesive, quartz powder or mullite powder and other additives in a certain proportion. These coatings are used to coat the outer layer of castings to improve the surface quality and dimensional accuracy of the castings.

[0003] The existing slurry mixers often have the following problems when in use: (1) the conveying pipe is difficult to clean after the silica sol is conveyed, resulting in residue clogging the pipe; (2) the viscosity of silica sol is greatly affected by temperature, and many existing equipment lacks an effective heating device, which may lead to unstable mixing ratio; (3) the method of directly injecting silica sol into the mixing tank cannot achieve uniform distribution, affecting the mixing effect and the consistency of the slurry. Utility Model Content

[0004] Purpose of the invention: The purpose of this utility model is to provide a slurry mixer for investment casting, which integrates a three-way valve cleaning system, a spiral feeding mechanism and a silica sol spraying structure to achieve precise proportioning, efficient mixing and convenient cleaning, thereby improving slurry quality and production efficiency.

[0005] Technical solution:

[0006] A slurry mixer for investment casting includes a mixing tank, a raw material chamber, and a silica sol storage chamber. The raw material chamber is connected to the mixing tank via a feeding mechanism. A three-way valve is installed between the silica sol storage chamber and the mixing tank. A delivery pump is installed between the three-way valve and the mixing tank. Two ends of the three-way valve are connected to the silica sol storage chamber and the mixing tank respectively via delivery pipes. The other end of the three-way valve is connected to an external cleaning pipe. A control motor is installed on the top of the mixing tank. The control motor is connected to a stirring shaft. One end of the stirring shaft extends into the interior of the mixing tank and is connected to stirring blades. A material outlet is also provided at the bottom of the mixing tank.

[0007] Furthermore, an annular silica sol temporary storage chamber is provided inside the top of the mixing tank, and the stirring shaft passes through the annular opening in the center of the silica sol temporary storage chamber. Multiple silica sol spray heads are equidistantly arranged at the bottom of the silica sol temporary storage chamber along its circumference. A silica sol inlet connected to a conveying pipe is provided at the top of the silica sol temporary storage chamber. A raw material inlet connected to a feeding mechanism is provided at the lower side wall of the mixing tank located in the silica sol temporary storage chamber.

[0008] Furthermore, the three-way valve is located at one end near the silica sol storage chamber.

[0009] Furthermore, a solenoid valve is installed at the connection point between the silica sol storage chamber and the delivery pipe.

[0010] Furthermore, the delivery pump is a diaphragm pump.

[0011] Furthermore, a heating device is provided in the silica sol storage chamber.

[0012] Furthermore, the feeding mechanism is a screw feeding mechanism.

[0013] Beneficial effects: By setting up a three-way valve and connecting it to an external cleaning pipe, the silica sol can be cleaned through the external cleaning pipe after being injected into the mixing chamber and stirred. This prevents silica sol residue in the conveying pipe from drying and solidifying in the pipeline, which could cause blockage or contamination of the quality of subsequent silica sol. The device integrates a three-way valve cleaning system, a spiral feeding mechanism, and a silica sol spraying structure, achieving precise proportioning, efficient mixing, and convenient cleaning, thereby improving slurry quality and production efficiency. Attached Figure Description

[0014] Figure 1 This is a perspective view of the present invention;

[0015] Figure 2 This is an enlarged view of the connection position between the mixing tank and the silica sol storage chamber of this utility model;

[0016] Figure 3 The internal structure of the mixing tank of this utility model Figure 1 ;

[0017] Figure 4 This is a cross-sectional view of the mixing tank of this utility model;

[0018] Figure 5 The internal structure of the mixing tank of this utility model Figure 2 ;

[0019] Reference numerals: 1. Mixing tank; 2. Raw material chamber; 3. Silica sol storage chamber; 4. Feeding mechanism; 5. Three-way valve; 6. Conveying pipe; 7. External cleaning pipe; 8. Control motor; 9. Mixing shaft; 10. Mixing blades; 11. Material outlet; 12. Silica sol temporary storage chamber; 13. Silica sol spray head; 14. Solenoid valve; 15. Conveying pump. Detailed Implementation

[0020] To make the technical solution of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Example 1

[0022] like Figure 1-5As shown, a slurry mixer for investment casting includes a mixing tank 1, a raw material chamber 2, and a silica sol storage chamber 3. The raw material chamber 2 is connected to the mixing tank 1 via a feeding mechanism 4. A three-way valve 5 is provided between the silica sol storage chamber 3 and the mixing tank 1. A delivery pump 15 is provided between the three-way valve 5 and the mixing tank 1. Two ends of the three-way valve 5 are respectively connected to the silica sol storage chamber 3 and the mixing tank 1 via delivery pipes 6. The other end of the three-way valve 5 is connected to an external cleaning pipe 7. A control motor 8 is provided on the outside of the top of the mixing tank 1. The control motor 8 is connected to a stirring shaft 9. One end of the stirring shaft 9 extends into the interior of the mixing tank 1 and is connected to a stirring blade 10. A material outlet 11 is also provided at the bottom of the mixing tank 1.

[0023] In this embodiment, an annular silica sol temporary storage chamber 12 is provided inside the top of the stirring tank 1. The stirring shaft 9 passes through the annular opening in the center of the silica sol temporary storage chamber 12. Multiple silica sol spray heads 13 are equidistantly arranged at the bottom of the silica sol temporary storage chamber 12 along its circumference. A silica sol inlet connected to the conveying pipe 6 is provided at the top of the silica sol temporary storage chamber 12. A raw material inlet connected to the feeding mechanism 4 is provided at the lower side wall of the stirring tank 1 located in the silica sol temporary storage chamber 12.

[0024] By setting up an annular temporary storage chamber 12 and multiple spray heads 13, silica sol can be evenly sprayed into the mixing tank 1, ensuring that the raw materials and silica sol are fully mixed and improving the mixing effect.

[0025] In this embodiment, the three-way valve 5 is located at one end near the silica sol storage chamber 3. This structure results in a shorter delivery pipe between the three-way valve and the silica sol storage chamber 3, and the valve is connected to the silica sol storage chamber 3 within the same storage space, preventing viscosity changes, solidification, or other performance degradation due to prolonged exposure or changes in the external environment.

[0026] In this embodiment, a solenoid valve 14 is provided at the connection position between the silica sol storage chamber 3 and the delivery pipe 6.

[0027] In this embodiment, the transfer pump 15 is a diaphragm pump. The selection of a diaphragm pump as the transfer pump 15 effectively avoids the difficulties in conveying silica sol due to its high viscosity, while providing a stable flow rate to ensure uniform material delivery. The diaphragm pump also has a self-priming function, enabling it to continue operating even at low liquid levels.

[0028] In this embodiment, a heating device is installed in the silica sol storage chamber 3. The viscosity of silica sol is affected by temperature; designing a heating device ensures that the silica sol maintains suitable fluidity at lower temperatures, preventing high-viscosity silica sol from clogging the delivery pipes or causing uneven mixing. The heating device also helps improve mixing efficiency and stabilize the mixing ratio of the slurry.

[0029] In this embodiment, the feeding mechanism 4 is a screw feeding mechanism. The screw feeding mechanism 4 can ensure that the raw materials are fed into the mixing tank at a stable speed and uniform flow rate, avoiding material accumulation or blockage and improving production efficiency. At the same time, the screw feeding mechanism 4 has good adaptability to different types of powder raw materials, can handle materials of different particle sizes, and ensures accurate delivery of raw materials during the mixing process.

[0030] Understandably, the mixing tank 1 can be equipped with a separate cleaning liquid outlet, which is separate from the material outlet 11, to avoid affecting the subsequent conveying of the slurry.

[0031] Working principle: Raw materials are fed into mixing tank 1 via screw feeding mechanism 4. Silica sol is transported to the temporary storage chamber of mixing tank 1 through a three-way valve and a delivery pump. The silica sol is then evenly sprayed from the temporary storage chamber into the mixing tank. The stirring shaft 9 drives the stirring blades 10 to rotate and mix the materials. After the slurry mixing is completed or periodically, the delivery pipe and mixing tank 1 are cleaned through an external cleaning system.

[0032] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A slurry mixer for investment casting, characterized in that, The system includes a mixing tank (1), a raw material chamber (2), and a silica sol storage chamber (3). The raw material chamber (2) is connected to the mixing tank (1) via a feeding mechanism (4). A three-way valve (5) is provided between the silica sol storage chamber (3) and the mixing tank (1). A delivery pump (15) is provided between the three-way valve (5) and the mixing tank (1). Two ends of the three-way valve (5) are respectively connected to the silica sol storage chamber (3) and the mixing tank (1) via delivery pipes (6). The other end of the three-way valve (5) is connected to an external cleaning pipe (7). A control motor (8) is provided on the outside of the top of the mixing tank (1). The control motor (8) is connected to a stirring shaft (9). One end of the stirring shaft (9) extends into the interior of the mixing tank (1) and is connected to a stirring blade (10). A material outlet (11) is also provided at the bottom of the mixing tank (1).

2. The slurry mixer for investment casting according to claim 1, characterized in that, The top of the mixing tank (1) is provided with an annular silica sol temporary storage chamber (12). The stirring shaft (9) passes through the annular opening in the center of the silica sol temporary storage chamber (12). Multiple silica sol spray heads (13) are equidistantly arranged at the bottom of the silica sol temporary storage chamber (12) along its circumference. The top of the silica sol temporary storage chamber (12) is provided with a silica sol inlet connected to the conveying pipe (6). The mixing tank (1) is provided with a raw material inlet connected to the feeding mechanism (4) at the lower side wall of the silica sol temporary storage chamber (12).

3. The slurry mixer for investment casting according to claim 1, characterized in that, The three-way valve (5) is located at one end near the silica sol storage chamber (3).

4. The slurry mixer for investment casting according to claim 1, characterized in that, A solenoid valve (14) is provided at the connection position between the silica sol storage chamber (3) and the delivery pipe (6).

5. The slurry mixer for investment casting according to claim 1, characterized in that, The delivery pump (15) is a diaphragm pump.

6. The slurry mixer for investment casting according to claim 1, characterized in that, A heating device is installed in the silica sol storage chamber (3).

7. The slurry mixer for investment casting according to claim 1, characterized in that, The feeding mechanism (4) is a screw feeding mechanism.

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