Ceramic slip casting system

Abstract

The utility model discloses a ceramic slip casting forming system which comprises a slip casting tank and a mold, a slurry inlet of the slip casting tank is connected with a slurry source through a slurry inlet pipe, a slurry outlet of the slip casting tank is connected with a slurry conveying pipe, a ceramic forming cavity is formed in the mold, and two slip casting pipes arranged at intervals are arranged at the bottom of the forming cavity in a penetrating mode. Outlets of the two grouting pipes extend into the forming cavity, inlets of the two grouting pipes are connected with the grout feeding pipe, and the pipe diameters of the two grouting pipes are different. The flow rates of slurry provided by the two grouting pipes with different diameters under the same pressure are different. And when the two streams of slurry with different flow speeds meet in the intersection area, impact forces formed by speed difference counteract each other, so that the convex mark phenomenon generated in the intersection area is reduced. And the defect risk caused by convex marks in the subsequent firing process of the product is effectively reduced, so that the yield of the product is improved, and the effect of the production process is optimized.

Description

Technical Field

[0001] This utility model relates to the field of ceramic products, specifically to a ceramic slip casting system. Background Technology

[0002] Existing ceramic products are usually formed by slip casting. The conventional production process is as follows: the raw material department injects the forming slurry into the slip casting tank, then opens the valve of the slip casting tank, and the slurry enters each slip casting pipe through the slip delivery pipe and then into each mold. Finally, the ceramic blank is formed in each mold. After the ceramic blank is formed in the mold, the remaining slurry in each forming cavity is discharged into the recycling tank through each slip casting pipe and slip delivery pipe.

[0003] In the above process, double-pipe grouting is typically used when injecting grout into the mold. Double-pipe grouting allows for simultaneous injection of grout into the mold, shortening the grouting time, improving production efficiency, and creating a more uniform grout distribution within the mold, reducing defects caused by uneven grout flow. However, if... Figure 3 When the slurry is injected into the mold simultaneously through two pipes, the two streams flow at the same velocity. They meet and impact at the confluence area B within the mold, leaving a noticeable raised mark. Furthermore, as the slurry level rises within the mold, the point where the two streams meet also rises at the same rate, making the raised mark very prominent. During subsequent product firing, this raised mark will cause unevenness and defects on the product. Utility Model Content

[0004] The purpose of this invention is to provide a ceramic slip casting system that can reduce the bumps formed when two slurries meet in the mold, effectively reduce defects caused by bumps during subsequent firing, and improve the yield rate.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A ceramic slurry casting system includes a slurry injection tank and a mold. The slurry inlet of the slurry injection tank is connected to a slurry source via a slurry inlet pipe, and the slurry outlet of the slurry injection tank is connected to a slurry delivery pipe. The mold has a ceramic forming cavity inside, and two spaced-apart slurry injection pipes pass through the bottom of each forming cavity. The outlets of the two slurry injection pipes extend into the forming cavity, and their inlets are respectively connected to the slurry delivery pipes. The two slurry injection pipes have different diameters.

[0007] By employing the above technical solution, the two grouting pipes of different diameters in this invention provide slurry with different flow rates under the same pressure. The larger diameter grouting pipe provides a faster flow rate, while the smaller diameter grouting pipe provides a slower flow rate. When these two streams of slurry with different flow rates meet at the confluence area, the impact forces generated by the velocity difference cancel each other out, reducing the effect of direct collision and thus mitigating the possibility of raised marks in the confluence area. This effectively reduces the risk of defects caused by raised marks during subsequent firing, thereby improving the product yield and optimizing the production process.

[0008] In a specific embodiment of this utility model: there are multiple molds, which are distributed at intervals along the slurry delivery pipe.

[0009] In a specific embodiment of this utility model: the diameters of the two grouting pipes corresponding to each mold are 25mm and 16mm, respectively.

[0010] In a specific embodiment of this utility model: the mold is made of plaster material.

[0011] In a specific embodiment of this utility model: the grouting pipe is a plastic pipe.

[0012] In a specific embodiment of this utility model: the top of the grouting tank is provided with a first liquid level sensor and a second liquid level sensor for detecting the liquid level; both the first liquid level sensor and the second liquid level sensor are connected to a controller.

[0013] In a specific embodiment of this utility model: the first liquid level sensor is set at a position not lower than 80% of the liquid level in the grouting tank, and the second liquid level sensor is set higher than the first liquid level sensor.

[0014] In a specific embodiment of this utility model: the grouting tank further includes a third liquid level sensor for detecting the liquid level, with the first liquid level sensor positioned between the third liquid level sensor and the second liquid level sensor. The third liquid level sensor is electrically connected to the controller. With this structure, the third liquid level sensor can serve as a backup when the first liquid level sensor fails, improving the reliability of liquid level control within the grouting tank and increasing production safety.

[0015] In a specific embodiment of this utility model: a first solenoid valve is connected to the grouting pipe near the grout outlet of the grouting tank; a second solenoid valve is connected to the grouting pipe near the grout inlet of the grouting tank; a third solenoid valve is connected to all grouting pipes; and a fourth solenoid valve is connected to the grouting pipe behind the last mold. The first solenoid valve, the second solenoid valve, all the third solenoid valves, and the fourth solenoid valve are all electrically connected to the controller.

[0016] In summary, in this invention, the two grouting pipes corresponding to each mold have different diameters. Under the same pressure, these two pipes provide different slurry flow rates; the larger diameter pipe provides a faster flow rate, while the smaller diameter pipe provides a slower flow rate. When these two streams of slurry with different flow rates meet at the confluence area, the impact forces caused by the velocity difference cancel each other out, thus mitigating the protrusion phenomenon in the confluence area. This effectively reduces the risk of defects caused by protrusions during subsequent firing, thereby improving the product yield and optimizing the production process. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the structure of a ceramic slip casting system according to this utility model;

[0019] Figure 2 This shows that the two grouting pipes have different diameters;

[0020] Figure 3 This shows that the two grouting pipes have the same diameter. Detailed Implementation

[0021] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1 As shown, this utility model is a ceramic slurry casting system, including a slurry tank 9 and multiple molds 10. The slurry inlet of the slurry tank 9 is connected to a slurry source via a slurry inlet pipe 906. The slurry outlet of the slurry tank 9 is connected to a recovery tank (not shown) via a slurry delivery pipe 908 and a slurry discharge pump 6. A first solenoid valve 901 is connected to the slurry delivery pipe 908 near the slurry outlet of the slurry tank 9. A second solenoid valve 905 is installed on the slurry inlet pipe 906 near the slurry inlet of the slurry tank 9.

[0023] The grouting tank 9 has a first liquid level sensor 902 and a second liquid level sensor 903 for detecting the liquid level. In this embodiment, the first liquid level sensor 902 is positioned at a level not lower than 80% of the liquid level in the grouting tank 9, and the second liquid level sensor 903 is positioned higher than the first liquid level sensor 902.

[0024] In this embodiment, the grouting tank 9 also includes a third liquid level sensor 904 for detecting the liquid level. The third liquid level sensor 904 is positioned below the first liquid level sensor 902. The purpose of this third liquid level sensor 904 is to serve as a backup in case the first liquid level sensor 902 fails, thereby improving the reliability of liquid level control in the grouting tank 9 and increasing production safety.

[0025] The first liquid level sensor 902, the second liquid level sensor 903, the third liquid level sensor 904, the slurry pump 6, the first solenoid valve 901, and the second solenoid valve 905 are all connected to the controller. The controller detects the liquid level in the grouting tank 9 through the first liquid level sensor 902, the second liquid level sensor 903, and the third liquid level sensor 904. When both the first liquid level sensor 902 and the second liquid level sensor 903 detect slurry (i.e., the slurry level is high), the controller controls the second solenoid valve 905 to close and the first solenoid valve 901 to open, and slurry is injected into each mold through the slurry delivery pipe; when neither the first liquid level sensor 902 nor the second liquid level sensor 903 detects slurry (i.e., the slurry level is low), the controller controls the first solenoid valve 901 to close and the second solenoid valve 905 to open, and slurry is replenished.

[0026] Multiple molds 10 are spaced apart along the slurry delivery pipe 908, and each mold 10 has a ceramic forming cavity 11 inside. Two spaced-apart injection pipes 12 are installed at the bottom of each forming cavity 11. The outlets of the two injection pipes 12 extend into the corresponding forming cavity 11, and their inlets are connected to the slurry delivery pipe 908. A third solenoid valve 121 is connected to all injection pipes 12. A fourth solenoid valve 907 is connected to the slurry delivery pipe behind the last mold. All third solenoid valves 121 are electrically connected to a controller. Using dual injection pipes 12 allows for simultaneous injection of slurry into the molds, shortening the injection time and improving production efficiency.

[0027] like Figure 2 As shown, in this embodiment, the two injection pipes 12 corresponding to each mold have different diameters. One injection pipe 12a has a diameter of 25mm, and the other injection pipe 12b has a diameter of 16mm. The injection pipes 12 are made of plastic. With this structure, the two slurries have different flow rates under the same pressure. The larger diameter injection pipe provides a faster flow rate, while the smaller diameter injection pipe provides a slower flow rate. When these two slurries with different flow rates meet at the confluence area, the impact force caused by the speed difference cancels each other out, thereby reducing the protrusions generated in the confluence area A. This effectively reduces defects caused by protrusions during subsequent firing of the product, improving the product yield.

[0028] The above describes the ceramic slip casting system of this utility model, and its working principle is as follows:

[0029] First, close the first solenoid valve 901 and open the second solenoid valve 905 to inject the prepared slurry into the grouting tank 9 through the slurry inlet pipe 906. When the slurry level in the grouting tank 9 reaches the high level of the second sensor 903, close the second solenoid valve 905 to stop slurry injection. Conversely, when the slurry level in the grouting tank 9 falls below the low level, close the first solenoid valve 901 to continue injecting slurry into the tank, ensuring that the slurry level in the grouting tank 9 remains between the high and low levels.

[0030] When ceramic blanks need to be made, the controller opens the first solenoid valve 901 and all the third solenoid valves 121, and closes the fourth solenoid valve 907. The prepared slurry in the slurry tank is injected into each forming cavity 11 through the slurry delivery pipe 908 and the slurry injection pipe 12. After each forming cavity is filled with slurry, the controller closes the first solenoid valve 901 and all the third solenoid valves 121. After the ceramic blanks are formed in each mold 10, all the third and fourth solenoid valves are opened, and the slurry discharge pump 6 is started, draining the remaining slurry in each forming cavity into the recovery tank through the slurry injection pipe 12 and the slurry delivery pipe 908. Afterwards, the recovery tank prepares the slurry, and after preparation, the slurry is circulated back into the slurry tank through pipelines for continued use to avoid waste.

[0031] In summary, in this invention, the two grouting pipes corresponding to each mold have different diameters. This results in different slurry flow rates from the two pipes under the same pressure; the larger diameter pipe provides a faster flow rate, while the smaller diameter pipe provides a slower flow rate. When these two streams of slurry with different flow rates meet at the confluence area, the impact forces caused by the velocity difference cancel each other out, thus mitigating the protrusion phenomenon in the confluence area. This effectively reduces the risk of defects caused by protrusions during subsequent firing, thereby improving the product yield and optimizing the production process.

[0032] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A ceramic slip casting system, comprising a slip casting tank and a mold, wherein the slip inlet of the slip casting tank is connected to a slip source via a slip inlet pipe, the slip outlet of the slip casting tank is connected to a slip delivery pipe, the mold has a ceramic forming cavity inside, and two spaced slip casting pipes pass through the bottom of the forming cavity, the outlets of the two slip casting pipes extending into the forming cavity, and the inlets of the two slip casting pipes being connected to the slip delivery pipes respectively, characterized in that, The two grouting pipes have different diameters.

2. The ceramic slip casting system according to claim 1, characterized in that, The number of molds is multiple, and the multiple molds are distributed at intervals along the slurry delivery pipe.

3. The ceramic slip casting system according to claim 2, characterized in that, The diameters of the two grouting pipes on each mold are 25mm and 16mm, respectively.

4. The ceramic slip casting system according to claim 1, characterized in that, The mold is made of plaster material.

5. The ceramic slip casting system according to claim 1, characterized in that, The grouting pipe is a plastic pipe.

6. The ceramic slip casting system according to claim 1, characterized in that, The top of the grouting tank is equipped with a first liquid level sensor and a second liquid level sensor for detecting the liquid level; both the first liquid level sensor and the second liquid level sensor are connected to a controller.

7. The ceramic slip casting system according to claim 6, characterized in that, The first liquid level sensor is set at a position no lower than 80% of the liquid level in the grouting tank, and the second liquid level sensor is set higher than the first liquid level sensor.

8. The ceramic slip casting system according to claim 7, characterized in that, The grouting tank also has a third liquid level sensor for detecting the liquid level, with the first liquid level sensor located between the third liquid level sensor and the second liquid level sensor, and the third liquid level sensor being electrically connected to the controller.

9. The ceramic slip casting system according to claim 8, characterized in that, A first solenoid valve is connected to the grouting pipe near the grout outlet of the grouting tank, a second solenoid valve is connected to the grouting pipe near the grout inlet of the grouting tank, a third solenoid valve is connected to all grouting pipes, and a fourth solenoid valve is connected to the grouting pipe behind the last mold. The first solenoid valve, the second solenoid valve, all the third solenoid valves, and the fourth solenoid valve are all electrically connected to the controller.

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