Method for injecting slurry into mold

Abstract

The invention discloses a method for grouting into a mold, which comprises a grouting tank and a mold, a slurry inlet of the grouting tank is connected with a slurry source through a slurry inlet pipe, a slurry outlet of the grouting tank injects slurry into the mold through a slurry delivery pipe and two grouting pipes, and the grouting method comprises the following steps: the grouting tank is connected with the mold; prepared slurry is injected into the grouting tank, and grouting is stopped after the slurry in the grouting tank reaches the high liquid level; opening the slurry feeding pipe, and injecting slurry into the mold at different flow speeds through the two slurry injection pipes; and after the molding of the ceramic blank in the mold is finished, opening the grouting pipe to discharge the slurry. When two streams of slurry with different flow speeds meet in the intersection area, impact force formed by speed difference counteracts each other, and the direct collision effect is weakened, so that the convex mark phenomenon possibly 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] The invention relates to the field of ceramic products, and in particular to a method for injecting grout into a mold. Background Art

[0002] Existing ceramic products are usually formed by grouting, and the production process is as follows: the raw material department injects the molding slurry into the grouting tank, then opens the valve of the grouting tank, and the slurry passes through the slurry delivery pipe, enters each grouting pipe, and is injected into each mold, and finally formed in each mold. After the ceramic body in the mold is formed, the remaining slurry in each molding cavity is discharged into the recovery tank through each grouting pipe and the slurry delivery pipe.

[0003] In the above process, double-tube grouting is usually used for grouting the mold. Double-tube grouting can inject slurry into the mold at the same time, which can shorten the grouting time and improve production efficiency. In addition, double-tube grouting can form a more uniform slurry distribution in the mold, reducing the defects caused by uneven slurry flow when the internal structure of the mold is complex. However, if Figure 3 When the mud is injected into the mold through the double tubes at the same time, the two muds have the same flow rate. The two muds meet and impact at the intersection area B in the mold, leaving obvious convex marks. As the liquid level in the mold rises, the position where the two muds meet also rises consistently, and the entire convex mark is very obvious. In the subsequent product firing process, this convex mark will cause uneven defects on the product, thus affecting the quality of the product. Summary of the invention

[0004] Based on this, in order to solve the above technical problems, the present invention provides a method for injecting grout into a mold.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A method for grouting into a mold comprises a grouting tank and a mold, wherein a grouting inlet of the grouting tank is connected to a slurry source through a slurry inlet pipe, and a slurry outlet of the grouting tank injects slurry into the mold through a slurry delivery pipe and two grouting pipes, and the grouting method comprises the following steps;

[0007] S1. Inject the prepared mud into the grouting tank. When the mud in the grouting tank reaches the high liquid level, stop grouting;

[0008] S2, opening the slurry delivery pipe connected to the slurry outlet of the grouting tank, and injecting the slurry into the molding cavity of the mold through the two grouting pipes. After the molding cavity is filled with slurry, the two grouting pipes are closed;

[0009] S3. When the ceramic embryo is formed in the mold, the two grouting pipes are opened to allow the remaining slurry in the mold to be discharged through the grouting pipe and the slurry delivery pipe;

[0010] In step S2, when the liquid level in the grouting tank is lower than the low liquid level, the slurry delivery pipe is closed, and the slurry inlet pipe is opened to inject slurry into the grouting tank, so that the slurry in the grouting tank is always between the high liquid level and the low liquid level, wherein the diameters of the two grouting pipes are different.

[0011] With the above technical solution, two grouting pipes of different diameters provide different mud flow rates under the same pressure. The large diameter grouting pipe can provide a faster flow rate, while the small diameter grouting pipe has a slower flow rate. When two muds with different flow rates meet in the intersection area, the impact force formed by the speed difference offsets each other, weakening the effect of direct collision, thereby reducing the convex marks that may be generated in the intersection area. The risk of defects caused by convex marks in the subsequent firing process of the product is effectively reduced, thereby improving the product yield and optimizing the effect of the production process.

[0012] In a specific implementation manner of the present invention: the diameters of the two grouting pipes are 25 mm and 18 mm respectively.

[0013] In a specific implementation manner of the present invention: the number of the molds is multiple, and the multiple molds are distributed at intervals along the slurry feeding pipe.

[0014] In a specific embodiment of the present invention: a first liquid level sensor and a second liquid level sensor for detecting the liquid level are provided on the top of the grouting tank, and the first liquid level sensor and the second liquid level sensor are both connected to a controller; when the first liquid level sensor and the second liquid level sensor both detect mud, the mud reaches the high liquid level, and when the first liquid level sensor and the second liquid level sensor both fail to detect mud, the mud is at the low liquid level.

[0015] In a specific implementation manner of the present invention: the first liquid level sensor is arranged at a position not lower than 80% of the liquid level in the grouting tank, and the second liquid level sensor is arranged higher than the first liquid level sensor.

[0016] In a specific embodiment of the present invention: the grouting tank further has a third liquid level sensor for detecting the liquid level, the first liquid level sensor is between the third liquid level sensor and the second liquid level sensor, and the third liquid level sensor is electrically connected to the controller. With this structure, the third liquid level sensor can be used as a backup when the first liquid level sensor fails, thereby improving the reliability of the liquid level control in the grouting tank and increasing production safety.

[0017] In a specific implementation of the present invention: a first solenoid valve is connected to a position on the slurry delivery pipe close to the slurry outlet of the grouting tank, a second solenoid valve is connected to a position on the slurry inlet pipe close to the slurry inlet of the grouting tank, a third solenoid valve is connected to all grouting pipes, and a fourth solenoid valve is connected to a position on the slurry delivery pipe located behind the last mold. The first solenoid valve, the second solenoid valve, all third solenoid valves and the fourth solenoid valve are all electrically connected to the controller.

[0018] In summary, the diameters of the two grouting pipes corresponding to each mold in the present invention are different, and the two grouting pipes of different diameters provide different mud flow rates under the same pressure. The large diameter grouting pipe can provide a faster flow rate, while the small diameter grouting pipe has a slower flow rate. When these two streams of mud with different flow rates meet in the intersection area, the impact forces formed by the speed difference offset each other, thereby reducing the convex mark phenomenon generated in the intersection area. The defect risk of the product caused by the convex mark in the subsequent firing process is effectively reduced, thereby improving the product yield and optimizing the effect of the production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] Figure 1 It is a structural schematic diagram of a method for grouting into a mold according to the present invention;

[0021] Figure 2 It shows that the diameters of the two grouting pipes are different;

[0022] Figure 3 It is shown that the diameters of the two grouting pipes are the same. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] See also Figure 1 As shown, the present invention is a method for grouting into a mold, comprising a grouting tank 9 and a plurality of molds 10. The grout inlet of the grouting tank 9 is connected to a slurry source through a grouting pipe 906. The grouting outlet of the grouting tank 9 is connected to a recovery tank (not shown) through a grouting pipe 908 and a slurry discharge pump 6. A first solenoid valve 901 is connected to the grouting pipe 908 near the grouting outlet of the grouting tank 9. A second solenoid valve 905 is provided on the grouting pipe 906 near the grouting inlet of the grouting tank 9.

[0025] 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 set at a position not lower than 80% of the liquid level in the grouting tank 9, and the second liquid level sensor 903 is higher than the first liquid level sensor 902.

[0026] In this embodiment, the grouting tank 9 is further provided with a third liquid level sensor 904 for detecting the liquid level, and the position of the third liquid level sensor 904 is lower than the position of the first liquid level sensor 902. The third liquid level sensor 904 is provided to serve as a backup when the first liquid level sensor 902 fails, to improve the reliability of the liquid level control of the grouting tank 9, and to increase production safety.

[0027] 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 the first liquid level sensor 902 and the second liquid level sensor 903 both detect mud (i.e. the mud level is at a high level), the controller controls the second solenoid valve 905 to be closed, the first solenoid valve 901 to be opened, and grouting is performed into each mold through the slurry delivery pipe; when the first liquid level sensor 902 and the second liquid level sensor 903 do not detect mud (i.e. the mud level is at a low level), the controller controls the first solenoid valve 901 to be closed, the second solenoid valve 905 to be opened, and slurry is added.

[0028] A plurality of molds 10 are distributed at intervals along the slurry feeding pipe, and each mold 10 has a ceramic molding cavity 11 inside. Two grouting pipes 12 are arranged at intervals at the bottom of each molding cavity 11. The outlets of the two grouting pipes 12 extend into the corresponding molding cavity 11, and the inlets are respectively connected to the slurry feeding pipe 908. A third solenoid valve 121 is connected to all grouting pipes 12. A fourth solenoid valve 907 is connected to the slurry feeding pipe at a position behind the last mold. All third solenoid valves 121 are electrically connected to the controller. The use of double grouting pipes 12 can inject slurry into the mold at the same time, which can shorten the grouting time and improve production efficiency.

[0029] like Figure 1 and Figure 2 As shown, the grouting method comprises the following steps:

[0030] S1. Open the second solenoid valve and inject the prepared mud into the grouting tank. After the mud in the grouting tank reaches the high liquid level, close the second solenoid valve to stop grouting.

[0031] S2, the controller controls to open the first solenoid valve 901 and all the third solenoid valves 121, and close the fourth solenoid valve 907; the molding mud in the grouting tank is injected into the molding cavity 11 of each mold through the slurry delivery pipe 908 and the grouting pipe 12. After each molding cavity is filled with mud, the first solenoid valve 901 and all the third solenoid valves 121 are controlled to be closed; and, when the liquid level in the grouting tank is lower than the low liquid level, the first solenoid valve 901 is closed, and the second solenoid valve is opened to inject mud into the grouting tank 9, so that the mud in the grouting tank 9 is always located between the high liquid level and the low liquid level.

[0032] In this step, the diameters of the two corresponding grouting pipes 12 on each mold are different. The flow rates of the two slurries are different under the same pressure, wherein the large diameter grouting pipe can provide a faster flow rate, while the small diameter grouting pipe has a slower flow rate. When the two slurries with different flow rates meet in the intersection area A, the impact forces formed by the speed difference cancel each other out, thereby reducing the convex mark phenomenon produced in the intersection area. The defect risk of the product caused by the convex mark in the subsequent firing process is effectively reduced, thereby improving the yield rate of the product and optimizing the effect of the production process. The diameter of one of the grouting pipes 12a is 25mm, and the diameter of the other injection molding pipe 12b is 16mm. The grouting pipe 12 adopts a plastic pipe.

[0033] S3. After the ceramic embryo is formed in the mold, all the third solenoid valves, the fourth solenoid valves and the slurry discharge pump 6 are opened to discharge the remaining slurry in each molding cavity into the recovery tank through each grouting pipe 12 and the slurry delivery pipe 908.

[0034] In this way, the mud is modulated through the recovery tank, and after the modulation is completed, the mud is circulated back to the grouting tank through the pipeline for continued use to avoid waste.

[0035] Compared with the prior art, the advantages of the present invention are: the diameters of the two grouting pipes corresponding to each mold in the present invention are different, and the two grouting pipes of different diameters provide different mud flow rates under the same pressure. The large diameter grouting pipe can provide a faster flow rate, while the small diameter grouting pipe has a slower flow rate. When these two streams of mud with different flow rates meet in the intersection area, the impact forces formed by the speed difference offset each other, thereby reducing the convex mark phenomenon generated in the intersection area. It effectively reduces the risk of defects caused by convex marks in the subsequent firing process of the product, thereby improving the product yield and optimizing the effect of the production process.

[0036] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A method for grouting into a mold, comprising a grouting tank and a mold, wherein the grouting inlet of the grouting tank is connected to a slurry source through a slurry inlet pipe, and the slurry outlet of the grouting tank injects slurry into the mold through a slurry delivery pipe and two grouting pipes, characterized in that: The grouting method comprises the following steps; S1. Inject the prepared mud into the grouting tank. When the mud in the grouting tank reaches the high liquid level, stop grouting; S2, opening the slurry delivery pipe connected to the slurry outlet of the grouting tank, and injecting the slurry into the molding cavity of the mold through the two grouting pipes. After the molding cavity is filled with slurry, the two grouting pipes are closed; S3. When the ceramic embryo is formed in the mold, the two grouting pipes are opened to allow the remaining slurry in the mold to be discharged through the grouting pipe and the slurry delivery pipe; In step S2, when the liquid level in the grouting tank is lower than the low liquid level, the slurry delivery pipe is closed, and the slurry inlet pipe is opened to inject slurry into the grouting tank, so that the slurry in the grouting tank is always between the high liquid level and the low liquid level, wherein the diameters of the two grouting pipes are different.

2. The method for grouting into a mold according to claim 1, characterized in that: The diameters of the two grouting pipes are 25 mm and 18 mm respectively.

3. The method for grouting into a mold according to claim 2, characterized in that: There are multiple molds, and the multiple molds are distributed at intervals along the slurry feeding pipe.

4. The method for grouting into a mold according to claim 1, characterized in that: A first liquid level sensor and a second liquid level sensor for detecting the liquid level are provided on the top of the grouting tank, and the first liquid level sensor and the second liquid level sensor are both connected to a controller; when the first liquid level sensor and the second liquid level sensor both detect mud, the mud reaches the high liquid level, and when the first liquid level sensor and the second liquid level sensor both fail to detect mud, the mud is at the low liquid level.

5. The method for grouting into a mold according to claim 4, characterized in that: 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.

6. The method for grouting into a mold according to claim 5, characterized in that: The grouting tank also has a third liquid level sensor for detecting the liquid level, the first liquid level sensor is between the third liquid level sensor and the second liquid level sensor, and the third liquid level sensor is electrically connected to the controller.

7. The method for grouting into a mold according to claim 6, characterized in that: A first solenoid valve is connected to the slurry delivery pipe at a position close to the slurry outlet of the grouting tank, a second solenoid valve is connected to the slurry inlet pipe at a position close to the slurry inlet of the grouting tank, a third solenoid valve is connected to all grouting pipes, and a fourth solenoid valve is connected to the slurry delivery pipe at a position behind the last mold. The first solenoid valve, the second solenoid valve, all third solenoid valves and the fourth solenoid valve are all electrically connected to the controller.

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