Composite purple pottery clay material with negative ion release function and preparation method of composite purple pottery clay material

Abstract

The invention relates to the field of clay materials. The invention aims to provide a composite purple pottery pug with a negative ion release function, the composite purple pottery pug is formed by mixing and stirring a main material and water, and the main material is prepared from the following raw materials in percentage by weight: 80% of purple pottery clay, 13% of tourmaline, 3% of feldspar and 4% of silica powder. The purple clay, the cordierite, the talc, the purple clay clinker and the silica powder are reasonably proportioned to form a main material of the pug, and the tourmaline and the auxiliary material are added, so that the forming plasticity is not obviously influenced, and the fineness and the air permeability structure of a finished product are ensured; the performance of releasing far infrared rays of a finished product produced from the Jianshui purple pottery pug is improved, and the Jianshui purple pottery pug has the advantage of releasing mineral ions and also has a certain antibacterial characteristic of releasing negative ions.

Description

Technical Field

[0001] The invention relates to the field of pottery clay, and in particular to a composite purple pottery clay with a negative ion releasing function and a preparation method thereof. Background Art

[0002] Jianshui purple pottery is a traditional folk craft from Jianshui County, Yunnan Province. It is considered one of China's "Four Famous Potteries," along with Yixing purple sand pottery from Jiangsu, Nixing pottery from Qinzhou, Guangxi, and Rongchang pottery from Chongqing. Its craftsmanship dates back a long time, and its fine texture is pure and free of impurities, rich in various minerals and trace elements. It is crafted through a complex production process involving clay preparation, wheel throwing, wet-body decoration, carving and filling, high-temperature firing, and unglazed polishing. The finished product, Jianshui purple pottery, boasts a delicate feel and breathable structure, earning it widespread acclaim in the teaware and kitchenware industries.

[0003] Due to the properties of its clay, Jianshui purple pottery produces a microporous structure in its finished products, releasing mineral ions such as iron, calcium, magnesium, and potassium. When used to hold beverages, it has antibacterial properties, absorbs odors, and releases trace mineral ions. However, its effectiveness is limited, and the mineral ions it releases are relatively limited. Tourmaline, a mineral with a unique crystal structure and chemical composition, possesses specific electrical polarity. Under certain conditions, this electrical polarity triggers thermal vibrations within the crystal, causing the tourmaline to release far-infrared radiation. Research has shown that the wavelengths of far-infrared radiation emitted by tourmaline are primarily concentrated between 4 and 14 microns, a range similar to that emitted by the human body. This range of far-infrared radiation has good biocompatibility and can have positive effects on human health, such as promoting blood circulation and enhancing metabolism.

[0004] Far-infrared waves also have antibacterial properties. Cell membranes are primarily composed of a phospholipid bilayer and proteins. The energy of far-infrared waves intensifies molecular movement within the cell membrane, disrupting its structure and function. The cell membrane is a crucial protective barrier for bacteria. Once damaged, substances within the bacteria leak out, affecting their normal metabolism and physiological functions, ultimately leading to their death. Bacterial survival and reproduction rely on a complex series of metabolic processes catalyzed by various enzymes. Far-infrared energy can increase the temperature within bacterial cells. When the temperature exceeds a certain range, enzyme activity within the bacteria decreases or even inactivates. For example, some enzymes involved in bacterial respiration are temperature-sensitive. The temperature fluctuations caused by far-infrared waves can disrupt their activity, affecting bacterial energy metabolism and hindering normal growth and reproduction due to insufficient energy supply. Far-infrared waves can also affect bacterial DNA replication and transcription. During DNA replication, the energy of far-infrared waves can break hydrogen bonds within DNA molecules or alter the arrangement of base pairs, leading to errors or even failure of DNA replication. During the transcription process, far-infrared waves may also interfere with the binding of RNA polymerase to the DNA template, affecting the synthesis of mRNA, thereby preventing bacteria from synthesizing the proteins required for growth and reproduction, and inhibiting bacterial growth and reproduction.

[0005] Generally speaking, when the temperature of the environment in which tourmaline is exposed increases, the thermal motion of its internal particles intensifies, prompting the stone to release far-infrared rays. Tourmaline can also emit far-infrared rays at room temperature, but its ability to release far-infrared rays increases when the temperature rises to around 30°C-60°C. This is exactly the temperature at which various Jianshui purple pottery products are used, such as tea sets and tableware, giving it a natural advantage as a raw material for Jianshui purple pottery. Summary of the Invention

[0006] The present invention aims to provide a composite purple pottery clay material with a negative ion release function and a preparation method thereof. By adding tourmaline and auxiliary materials, the far-infrared ray release performance of the finished product produced by Jianshui purple pottery clay material is improved while ensuring no significant effect on the molding plasticity and ensuring the fineness and air permeability of the finished product. In addition to the advantage of releasing mineral ions inherent in Jianshui purple pottery, the product also has certain antibacterial properties of releasing negative ions.

[0007] To achieve the above-mentioned purpose of the invention, the technical solution adopted by the present invention is: a composite purple pottery clay material with negative ion release function, which is composed of a main material and water mixed and stirred, and the main material is composed of the following raw materials in the following weight percentages: 80% purple clay, 13% tourmaline, 3% feldspar, and 4% silicon powder.

[0008] Preferably, the purple clay is composed of the following raw materials in the following weight percentages: 54% of kaolin, 11% of loess, 10% of white clay, 11% of gray clay, and 14% of purple clay.

[0009] Preferably, the weight ratio of the main ingredient to water is 1:0.8.

[0010] Preferably, the particle size of each raw material in the main material is 300 mesh of kaolin, 300 mesh of tourmaline, 400 mesh of feldspar, and 400 mesh of silica powder.

[0011] Preferably, the method for preparing the mud material is to mix the main material and water in a ratio of 1:0.8, stir them thoroughly to make them evenly mixed, and pass them through a 200-mesh sieve to remove impurities; filter them through a filter press to form a mud cake, and send the mud cake to a mud kneading machine for mud kneading to prepare a blank with a moisture content of 20-25%.

[0012] Preferably, the mud is kneaded three times using a mud kneading machine, and the extrusion pressure at the discharge port of the mud kneading machine is controlled during the mud kneading process. The extrusion pressure at the discharge port of the mud kneading machine is pressurized for the first two of the three mud kneading processes, and is gradually reduced for the two times. The extrusion pressure at the discharge port of the mud kneading machine returns to normal for the third time.

[0013] Preferably, the extrusion pressure of the discharge barrel of the mud trainer is controlled by an outlet pressure regulating device arranged between the extrusion barrel and the discharge barrel of the mud trainer; the outlet pressure regulating device includes a connecting barrel and a pressurizing barrel arranged on the upper part of the connecting barrel, the two ends of the connecting barrel are respectively connected to the extrusion barrel and the discharge barrel, and the pressurizing barrel is connected to the connecting barrel; a mud pressing plate capable of moving in the vertical direction of the pressurizing barrel is arranged in the pressurizing barrel, and the mud pressing plate is driven by a driving mechanism.

[0014] Preferably, the connecting cylinder includes an inner cylinder and an outer cylinder, an annular cavity is formed between the inner cylinder and the outer cylinder, and the annular cavity is connected to the pressurizing cylinder; a plurality of strip holes extending along the length direction of the inner cylinder are evenly arranged in an annular shape on the side wall of the inner cylinder, and the annular cavity is connected to the inner cylinder through the strip holes.

[0015] Preferably, a pressure nozzle is provided on the inner side wall of the inner cylinder corresponding to the strip-shaped hole, and the pressure nozzle extends along the length direction of the strip-shaped hole, and the inner cavity of the pressure nozzle gradually narrows from the outside to the inside.

[0016] Preferably, the driving mechanism includes a screw arranged in the upper section of the pressurizing cylinder, the upper end of the screw is connected to the driving motor arranged at the top of the pressurizing cylinder; the screw outer sleeve is provided with a driving sleeve, the driving sleeve is matched with the screw thread, and the driving sleeve is fixedly connected to the mud pressing plate through a crank arm.

[0017] Preferably, the driving sleeve includes a main sleeve sleeved outside the screw and forming a threaded fit with the screw, and a secondary sleeve sleeved outside the lower end of the main sleeve and forming a rotational fit with the main sleeve, and the secondary sleeve is connected to the crank arm;

[0018] The inner wall of the secondary sleeve is provided with a plurality of cylindrical holes evenly arranged in an annular shape and extending radially along the secondary sleeve, and pins with hemispherical ends are arranged in the cylindrical holes; the outer wall of the main sleeve is provided with a hemispherical groove at a position opposite to the pins;

[0019] The top of the secondary sleeve is provided with an annular groove extending downward from the upper end surface, and the annular groove is closed by a cover plate provided on the top of the secondary sleeve, and a vertical adjusting bolt is provided on the cover plate at a position opposite to the annular groove, and the adjusting bolt is threadedly engaged with the cover plate; a pressure ring and a group of butterfly spring pieces are sequentially provided in the annular groove from top to bottom, and a pressure ring is further provided at a position corresponding to the pin below the butterfly spring piece, and the adjusting bolt presses the outer end of the pin by squeezing the pressure ring, the butterfly spring piece and the pressure ring, and causes the pin to extend into the slot on the main sleeve.

[0020] Preferably, an air inlet nozzle connected to the interior of the pressure cylinder is provided on one side of the upper portion of the pressure cylinder, and the air inlet nozzle is connected to the exhaust port of the vacuum device of the mud kneading machine through a pipeline.

[0021] Preferably, flanges are provided at both ends of the connecting cylinder, and the connecting cylinder is connected to the extrusion cylinder and the discharge cylinder through the flanges.

[0022] Preferably, a stepped surface corresponding to the inner cavity of the extrusion cylinder is formed at one end of the connecting cylinder close to the extrusion cylinder, and a sealing ring with a triangular cross-section is provided on the stepped surface.

[0023] The beneficial effects of the present invention are concentrated in the following aspects: adding tourmaline and feldspar to the clay material of Jianshui purple pottery can significantly enhance its ability to release infrared rays, far infrared rays and negative ions. Due to its unique crystal structure and electrical polarity, tourmaline, when stimulated by external energy, causes internal thermal vibrations to promote the release of far infrared rays; its thermoelectricity and piezoelectricity can ionize the air to produce negative ions. Under the action of external energy, the internal electrons of feldspar jump and combine with oxygen molecules to form negative ions, which also promote the release of infrared rays. After the two are added to the purple pottery clay, they not only give Jianshui purple pottery health functions, but also far infrared rays can promote blood circulation and enhance metabolism, and negative ions can be antibacterial and improve human body functions; they also enrich the functionality and product value of purple pottery, bringing new development directions and application prospects to Jianshui purple pottery. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a process flow diagram of the present invention;

[0025] Figure 2 It is a structural diagram of the discharge port of an existing mud extruder;

[0026] Figure 3 This is a schematic structural diagram of the outlet pressure regulating device used in the present invention;

[0027] Figure 4 for Figure 3 A magnified view of part A;

[0028] Figure 5 Schematic diagram of the end structure of the pressurizing nozzle. DETAILED DESCRIPTION

[0029] The present invention discloses a composite purple pottery clay material with a negative ion releasing function and a preparation method thereof. The clay material is mainly used for making Jianshui purple pottery articles such as tea sets and kitchen utensils. The far-infrared ray releasing performance of the finished products produced from the Jianshui purple pottery clay material is improved while ensuring no significant influence on the molding plasticity and ensuring the fineness and air permeability of the finished products. In addition to the advantage of releasing mineral ions inherent in the Jianshui purple pottery, the clay material also has certain antibacterial properties of releasing negative ions.

[0030] The present invention will be described in detail below with reference to the embodiments;

[0031] Example 1

[0032] A composite purple pottery clay material with a negative ion release function is prepared by mixing a main ingredient and water. The main ingredient is composed of the following raw materials in weight percentage: 80% 300-mesh purple clay, 13% 300-mesh tourmaline, 3% 400-mesh feldspar, and 4% 400-mesh silicon powder; the purple pottery clay is composed of the following raw materials in weight percentage: 54% wuhua soil, 11% loess, 10% white soil, 11% gray soil, and 14% purple soil.

[0033] like Figure 1 As shown in , the overall preparation process of the clay material described in the present invention is as follows: the main ingredients and water are mixed in a ratio of 1:0.8, stirred thoroughly to ensure a uniform mixture, and then filtered through a 200-mesh sieve to remove impurities; the clay cake is filtered through a filter press, and the cake is sent to a clay kneader for kneading three times to prepare a blank with a moisture content of 20-25%. The clay kneader is a ZL-350 vacuum clay kneader produced by Hebi Helong Special Equipment Co., Ltd. When extruding the clay material, the extrusion pressure at the outlet was measured to be 1.2 MPa.

[0034] Example 2

[0035] The same as Example 1, except that: during the mud kneading, the mud was kneaded three times using a mud kneader. During the mud kneading process, the extrusion pressure at the mud kneader outlet was controlled. The extrusion pressure at the mud kneader outlet was pressurized for the first two times and gradually decreased for the two times. The third time, no pressurization was performed, and the outlet pressure returned to normal. The first and second times were pressurized, with the first pressure being 1.6 MPa, the second pressure being 1.4 MPa, and the third pressure being 1.2 MPa.

[0036] Comparative Example 1

[0037] The preparation method is the same as that of Example 1, except that the main ingredients are: 90% kaolin, 3% tourmaline, 3% feldspar, and 4% silicon powder.

[0038] Comparative Example 2

[0039] The preparation method is the same as that of Example 1, except that the main ingredients are: kaolin is 70%, tourmaline is 23%, feldspar is 3%, and silicon powder is 4%.

[0040] Comparative Example 3

[0041] The preparation method is the same as that of Example 1, except that the main ingredients are: 60% kaolin, 23% tourmaline, 13% feldspar, and 4% silicon powder.

[0042] Comparative Example 4

[0043] The preparation method is the same as that of Example 1, except that, in the main ingredients, purple clay accounts for 90%, purple clay clinker accounts for 56%, and silicon powder accounts for 4%.

[0044] Plasticity test: The clay materials prepared in Examples 1-2 and Comparative Examples 1-4 were subjected to plasticity analysis. During the analysis, a round rod-shaped sample with a diameter of 2 cm and a length of 20 cm was cut from the clay material through a sampling tube; the sample was held at both ends and bent back and forth in a circular manner. The plasticity was scored based on the presence of fractures and surface cracks. A sample with no fractures or cracks after more than 10 back and forth bends was rated as excellent; a sample with no fractures or cracks after 5-10 back and forth bends was rated as qualified; and a sample with fractures or cracks after less than 5 bends was rated as unqualified (poor plasticity). The results are detailed in Table 1 below.

[0045] Porosity Testing: 20 samples of each type, each with a 5-cm diameter, were formed and sintered using traditional wheel throwing techniques. Porosity was then measured. A total of 100 samples were weighed in air, then completely immersed in water until the pores were filled with water. The surface water was wiped clean with a dry towel, and the samples were weighed again. Based on these two weighings and the density of water, the volume of water in the sample (i.e., the pore volume) was calculated. Finally, the porosity was calculated. The average porosity of the 20 samples in each example or comparative example was used as the final value (rounded to one decimal place). The results are detailed in Table 1 below.

[0046] Yield rate test: 100 ceramic cup samples of the above-mentioned examples 1-2 were made in batches using the clay materials of Examples 1-2, and were shaped and sintered using traditional methods. The defects of the 100 ceramic cups of Examples 1 and 2 were judged, and those with uneven surfaces, small particles in some areas, small bubbles, etc. were considered defective products. The yield rate was then statistically analyzed, and the results are detailed in Table 1 below.

[0047] Table 1 Statistics of plasticity and thermal shock resistance of the clay materials in the examples and comparative examples

[0048] plasticity Porosity Yield Example 1 Excellent 14.5% 92% Example 2 Excellent 13.7% 97% Comparative Example 1 Excellent 12.8% / Comparative Example 2 qualified 12.5% / Comparative Example 3 qualified 13.3% / Comparative Example 4 Excellent 16.4% /

[0049] As can be seen from Table 1, the clay material of the present invention has no difference in plasticity compared with the traditional Jianshui purple pottery clay material (Comparative Example 4), has no obvious effect on molding, has the advantages of fine texture and good air permeability of Jianshui purple pottery clay, and after controlling the pressure during the clay kneading process, the yield rate is excellent.

[0050] Far-infrared radiation test: The samples were placed in a constant temperature chamber set at different temperatures (30°C, 40°C, and 50°C). After the temperature stabilized, a far-infrared tester was aimed at the sample surface to measure the far-infrared radiation power and wavelength range at different temperatures. Multiple measurements were taken at each temperature point and the average value was obtained. The results are detailed in Table 2 below (average value range for each sample in the same embodiment or comparative example).

[0051] Negative ion release test: Place the sample in a sealed container and allow it to stand for a period of time to allow the negative ion release to reach a stable state. Then, insert a negative ion detector into the container and measure the negative ion concentration at different time points, such as 1 hour, 2 hours, and 3 hours. The results are detailed in Table 3 below. (The average value of each sample in the same embodiment or comparative example)

[0052] Table 2 Statistics of far infrared radiation and negative ion release of samples from Example 2 and Comparative Example 4

[0053] Test indicators Test conditions Example 2 Comparative Example 4 Difference Far infrared radiation rate 30℃ 85.3% 64.2% 21.1% Far infrared radiation rate 40℃ 92.6% 66.8% 25.8% Far infrared radiation rate 50℃ 94.7% 69.7% 25.0% Far infrared radiation peak wavelength 30℃ 9.8um 11.2um -1.4um Negative ion release concentration Seal for 1 hour <![CDATA[1244ion / cm 3 ]]> <![CDATA[187ion / cm 3 ]]> <![CDATA[1057ion / cm 3 ]]> Negative ion release concentration Seal for 2 hours <![CDATA[1547ion / cm 3 ]]> <![CDATA[196ion / cm 3 ]]> <![CDATA[1351ion / cm 3 ]]> Negative ion release concentration Seal for 3 hours <![CDATA[1640ion / cm 3 ]]> <![CDATA[213ion / cm 3 ]]> <![CDATA[1427ion / cm 3 ]]>

[0054] It can be seen from Table 2 that the Jianshui purple pottery products prepared with the clay material of the present invention have greatly improved far-infrared radiation rate and negative ion release capacity compared with Jianshui purple pottery products made with traditional clay materials.

[0055] Furthermore, after three rounds of clay kneading using a clay kneading machine and controlled pressure, the overall yield rate of the finished product was excellent. The inventors believe this is due to the following: Jianshui purple pottery has a fine and dense texture, and air inside the clay is difficult to expel during the refining process. Therefore, multiple rounds of clay kneading using a vacuum clay kneading machine are necessary. Otherwise, holes are likely to appear in the clay, affecting the quality of the finished product. However, by increasing the extrusion pressure at the clay kneading machine outlet and combining multiple rounds of clay kneading, the clay can be made more dense, helping to expel air from the clay and reducing internal holes.

[0056] The present invention adopts three times of mud kneading, and the first two times the discharge port is pressurized. On the one hand, it can assist in the discharge of gas in the mud, improve the density, and eliminate the hole defects that may appear in the later stage. On the other hand, during the last mud kneading, the normal discharge port pressure of the mud kneading machine is used. Since the mud enters the mud kneading machine again after being pressurized and exhausted and squeezed out, it is broken and transported by the cutter teeth. Although there is a risk of secondary hole generation at this time, the mud is under the protection of the vacuum system during the mud kneading process, so the impact is not significant. On the contrary, this method of restoring normal pressure treatment can restore the overpressure defect caused by pressurization, restore the plasticity and uniformity of the mud, and reduce the risk of uneven particles. The present invention has an excellent guarantee of the final yield of the finished product through reasonable and effective processing procedures.

[0057] Of course, when controlling the pressure of the discharge port, in theory, by reducing the size of the discharge port, although the extrusion pressure can be significantly increased and the hole defects in the clay blank can be reduced, this method is not universal due to the requirements of the clay blank size for wheel throwing, and the frequent replacement of the discharge port also increases the complexity of the operation. Increasing the pressure by increasing the operating speed of the main shaft will increase the output power of the main motor, which has the risk of burning the machine. Simply replacing high-power new equipment to meet the demand for increasing the extrusion pressure will obviously also cause a huge economic burden on the company, which is not desirable. How to achieve the effect of supercharging by modifying the existing model on the basis of the existing mud extruder is also a very important issue. For this reason, the present invention also discloses a mud extruder outlet pressure regulating device that is suitable for the modification of the existing model and can effectively control the pressure of the discharge port. The extrusion pressure of the mud extruder outlet is controlled by the outlet pressure regulating device arranged between the mud extruder extrusion barrel and the discharge port.

[0058] The discharge port of the existing mud making machine is as follows Figure 2 As shown in FIG, the extrusion cylinder 3 and the discharge cylinder 4 are directly flange-connected. The pressure regulating device of the present invention is as follows Figure 3-5 As shown in , the outlet pressure regulating device includes a connecting cylinder 1 and a pressurizing cylinder 2 arranged on the upper part of the connecting cylinder 1, which is installed between the extrusion cylinder 3 and the discharge cylinder 4, and can adapt to the installation requirements of various models. The two ends of the connecting cylinder 1 are respectively connected to the extrusion cylinder 3 and the discharge cylinder 4, and the pressurizing cylinder 2 is connected to the connecting cylinder 1. The connection between the connecting cylinder 1 and the extrusion cylinder 3 and the discharge cylinder 4 is also directly flange-connected, that is, flanges are provided at both ends of the connecting cylinder 1, and are connected to the extrusion cylinder 3 and the discharge cylinder 4 through the flanges. In order to ensure the tightness of the connection, a sealing gasket can be added between the two flanges. In addition, in order to facilitate the mud in the extrusion cylinder 3 to enter the connecting cylinder 1, the connecting cylinder 1 is formed with a stepped surface corresponding to the inner cavity of the extrusion cylinder 3 near one end of the extrusion cylinder 3, and a sealing ring 27 with a triangular cross-section is provided on the stepped surface.

[0059] The pressurizing cylinder 2 is provided with a mud pressing plate 5 capable of moving in the vertical direction of the pressurizing cylinder 2. The mud pressing plate 5 is driven by a driving mechanism. The specific structure of the driving mechanism is relatively large. From the perspective of implementation alone, it can be, for example: a hydraulic cylinder (simple to control, but relatively expensive), a pneumatic cylinder (simple to control, but relatively poor extrusion force, requiring special customization, and the pressurization is not stable enough).

[0060] When first used, the discharge port of the discharge barrel 4 is sealed with a plug. After the main shaft of the clay making machine squeezes the clay material and fills the discharge barrel 4, the connecting barrel 1, and the lower section of the pressurizing barrel 2, the plug is opened and the material is discharged normally. The pressure at the discharge port is detected by the pressure sensor set in the discharge barrel 4. When pressurizing, the drive mechanism controls the clay pressing plate 5 to press down, and the main shaft of the clay making machine squeezes the clay material together, thereby testing the purpose of pressurization. This type of pressure regulating device is convenient for modifying the discharge port pressure control of existing equipment without significantly increasing the economic burden of the enterprise.

[0061] In order to distribute the pressure from the mud pressing plate 5 more evenly to the mud material at the connecting tube 1 and the discharging tube 4, the connecting tube 1 may include an inner tube 6 and an outer tube 7, which are generally assembled in a detachable connection to facilitate disassembly and cleaning after use, and to facilitate secondary use. An annular cavity 8 is formed between the inner tube 6 and the outer tube 7, and the annular cavity 8 is connected to the pressurizing tube 2; a plurality of strip holes 9 extending along the length direction of the inner tube 6 are evenly arranged on the side wall of the inner tube 6 in an annular shape, and the annular cavity 8 is connected to the inner tube 6 through the strip holes 9. In this way, the mud material can be squeezed inward from the circumference through the annularly distributed strip holes 9, and the overall extrusion uniformity is better. Generally, 4-6 strip holes 9 are sufficient, and too many are not conducive to the overall structural strength of the inner tube 6.

[0062] In an alternative solution, for some low-viscosity materials with high fluidity, in order to increase the extrusion force, prevent the mud from flowing back into the annular cavity 8 and the pressure cylinder 2, and reduce the load of the mud pressing plate 5, a combination of Figure 3 and 5 As shown in , a pressurizing nozzle 10 is provided on the inner side wall of the inner cylinder 6 corresponding to the strip hole 9. The pressurizing nozzle 10 extends along the length direction of the strip hole 9, and the inner cavity of the pressurizing nozzle 10 gradually narrows from the outside to the inside.

[0063] Regarding the specific form of the driving mechanism, a feasible solution is as follows Figure 3As shown in , the driving mechanism of the present invention includes a screw 11 arranged in the upper section of the pressurizing cylinder 2, and the upper end of the screw 11 is connected to the driving motor 12 arranged at the top of the pressurizing cylinder 2; the outer sleeve of the screw 11 is provided with a driving sleeve 13, and the driving sleeve 13 is threadedly matched with the screw 11, and the driving sleeve 13 is fixedly connected to the mud pressing plate 5 through the crank arm 14. The driving motor 12 continuously outputs power to the screw 11, and the screw 11 is used to drive the mud pressing plate 5 downward through the driving sleeve 13 and the crank arm 14. At this time, the pressurizing cylinder 2 is generally a square cylinder, and the pressure plate 5 is a square plate that slides with it. However, in this case, in order to achieve pressure control and pressure limiting protection for the driving motor 12, the driving sleeve 13 of the present invention can achieve power tripping when the set pressure is exceeded, and can connect power when the pressure is insufficient, driving the mud pressing plate 5 to continue to press down.

[0064] For this reason, Figure 4 As shown in the figure, the drive sleeve 13 includes a main sleeve 15 which is sleeved outside the screw rod 11 and forms a threaded fit with the screw rod 11, and a secondary sleeve 16 which is sleeved outside the lower end of the main sleeve 15 and forms a rotational fit with the main sleeve 15, and the secondary sleeve 16 is connected to the crank arm 14.

[0065] The structure for realizing power connection and power release is as follows: a plurality of cylindrical holes 17 extending radially along the secondary sleeve 16 are evenly arranged on the inner side wall of the secondary sleeve 16 in an annular shape, and a pin 18 with hemispherical ends is arranged in the cylindrical hole 17; a hemispherical card groove 19 is provided on the outer side wall of the main sleeve 15 at a position opposite to the pin 18; an annular groove 20 extending downward from the upper end surface is provided on the top of the secondary sleeve 16, and the annular groove 20 is closed by a cover plate 21 provided on the top of the secondary sleeve 16, and the cover plate A vertical adjusting bolt 22 is provided at a position on 21 opposite to the annular groove 20, and the adjusting bolt 22 is threadedly engaged with the cover plate 21; a pressure ring 23 and a group of butterfly spring pieces 24 are sequentially provided in the annular groove 20 from top to bottom, and a pressure ring 25 is further provided at a position corresponding to the pin 18 below the butterfly spring piece 24. The adjusting bolt 22 presses the outer end of the pin 18 by squeezing the pressure ring 23, the butterfly spring piece 24 and the pressure ring 25, and makes the pin 18 extend into the slot 19 on the main sleeve 15.

[0066] When the pressure is insufficient, the screw 11 can continue to drive the drive sleeve 13, thereby driving the mud press plate 5 downward through the crank arm 14. When the power reaches the set value (set by the adjusting bolt 22), the driving sleeve 13 cannot continue to move downward due to the large reaction force. As the screw 11 continues to rotate, the rotational force of the main sleeve 15 overcomes the elastic force of the butterfly spring 24, retracting the pin 18 from the slot 19 into the column hole 17, achieving the separation of the main sleeve 15 and the auxiliary sleeve 16, thus achieving power release. When the pressure needs to be adjusted, the side door on the upper side of the pressurizing cylinder 2 can be opened and the adjusting bolt 22 can be turned.

[0067] On this basis, to further enhance the performance of the pressure regulating device, an air inlet nozzle 26 is provided on one side of the upper portion of the pressure cylinder 2, communicating with the interior of the pressure cylinder 2. The air inlet nozzle 26 is connected to the exhaust port of the vacuum device of the clay extruder via a pipeline. The air inlet nozzle 26 can be connected to the exhaust port of the vacuum device, and the pressurized air pumped out by the vacuum device is used to pressurize the interior of the pressure cylinder 2, thereby increasing the internal pressure of the pressure cylinder 2 and reducing the load on the drive motor 12 and the load on the clay pressing plate 5 to a certain extent.

Claims

1. A composite purple pottery clay material with negative ion release function, characterized in that: The main material is mixed and stirred with water, wherein the main material is composed of the following raw materials in the following weight percentages: 80% kaolin, 13% tourmaline, 3% feldspar, and 4% silicon powder.

2. The composite purple pottery clay material with negative ion release function according to claim 1, characterized in that: The purple clay is composed of the following raw materials in the following weight percentages: 54% of kaolin, 11% of loess, 10% of white clay, 11% of gray clay, and 14% of purple clay.

3. The composite purple pottery clay material with negative ion release function according to claim 2, characterized in that: The weight ratio of the main material to water is 1:0.

8.

4. The composite purple pottery clay material with negative ion release function according to claim 3, characterized in that: The particle sizes of the raw materials in the main material are 300 mesh of kaolin, 300 mesh of tourmaline, 400 mesh of feldspar and 400 mesh of silicon micropowder.

5. The method for preparing the composite purple pottery clay material with negative ion release function according to any one of claims 1 to 4, characterized in that: The main material and water are mixed in a ratio of 1:0.8, stirred thoroughly to make the mixture uniform, and passed through a 200-mesh sieve to remove impurities; the mixture is filtered through a filter press to form a mud cake, which is sent to a mud kneading machine for mud kneading to prepare a blank with a moisture content of 20-25%.

6. The method for preparing the composite purple pottery clay material with negative ion release function according to claim 5, characterized in that: The mud is kneaded three times on a mud kneading machine, and the extrusion pressure at the discharge port of the mud kneading machine is controlled during the kneading process. The extrusion pressure at the discharge port of the mud kneading machine is pressurized for the first two of the three times, and is gradually reduced for the two times. The extrusion pressure at the discharge port of the mud kneading machine returns to normal for the third time.

7. The method for preparing the composite purple pottery clay material with negative ion release function according to claim 6, characterized in that: The extrusion pressure of the mud extruder outlet is controlled by an outlet pressure regulating device arranged between the mud extrusion cylinder and the outlet.

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