Composite purple pottery clay material with negative ion releasing function and preparation method thereof

Abstract

The present application relates to the field of pottery clay. The purpose is to provide a kind of composite purple pottery clay with negative ion release function, which is formed by mixing and stirring main material and water, and the main material is composed of the following raw materials in percentage by weight: 80% purple pottery clay, 13% tourmaline, 3% feldspar and 4% silicon powder. The main material of the clay is formed by reasonable proportioning of purple pottery clay, cordierite, talc, purple pottery clay grog and silicon powder. By adding tourmaline and auxiliary materials, the performance of the finished product of Jian Shui purple pottery clay production is improved in releasing far infrared rays without significantly affecting the plasticity of molding, ensuring the fineness and air permeability structure of the finished product. In addition to the advantages of releasing mineral ions inherent in Jian Shui purple pottery, it also has certain antibacterial properties of releasing negative ions.

Description

Technical Field

[0001] This invention relates to the field of pottery clay materials, specifically to a composite purple clay material with negative ion release function and its preparation method. Background Technology

[0002] Jianshui purple pottery is a traditional folk handicraft from Jianshui County, Yunnan Province. Along with Yixing purple clay pottery from Jiangsu, Qinzhou Nixing pottery from Guangxi, and Rongchang pottery from Chongqing, it is known as one of China's "Four Famous Potteries." Its production history is long and rich. The pottery is characterized by its delicate texture, purity, and abundance of minerals and trace elements. It is produced through a complex process involving clay preparation, shaping on the wheel, decorating the wet clay, carving and filling the clay, high-temperature firing, and unglazed polishing. Finished Jianshui purple pottery has a delicate feel and a breathable structure, making it highly sought after in the teaware and kitchenware industries.

[0003] Jianshui purple pottery, due to the characteristics of its clay, has a microporous structure when fired, releasing mineral ions such as iron, calcium, magnesium, and potassium. When used to hold beverages, it has antibacterial properties, absorbs impurities, and releases trace mineral ions. However, its effectiveness is limited, and the released mineral ions are relatively singular. Tourmaline is a mineral with a unique crystal structure and chemical composition. It possesses special electrical properties within its structure. Under certain conditions, these properties trigger thermal vibrations within the crystal, causing tourmaline to release far-infrared rays. Studies have shown that the far-infrared wavelengths emitted by tourmaline are mainly concentrated between 4 and 14 micrometers. This range of far-infrared rays is similar to the wavelengths of far-infrared rays emitted by the human body, exhibiting good biocompatibility and positive effects on human health, such as promoting blood circulation and enhancing metabolism.

[0004] Meanwhile, far-infrared waves also possess 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, leading to damage to its structure and function. The cell membrane is a crucial protective barrier for bacteria; once damaged, internal substances leak out, affecting normal metabolism and physiological functions, ultimately causing bacterial death. Bacterial survival and reproduction depend on a series of complex metabolic processes catalyzed by various enzymes. The energy of far-infrared waves can raise the intracellular temperature of bacteria. When the temperature exceeds a certain range, it can reduce or even inactivate enzyme activity within the bacteria. For example, some enzymes involved in bacterial respiration are temperature-sensitive; temperature changes caused by far-infrared waves can interfere with the activity of these enzymes, thus affecting bacterial energy metabolism and preventing normal growth and reproduction due to insufficient energy supply. Furthermore, far-infrared waves can affect bacterial DNA replication and transcription. During DNA replication, the energy of far-infrared waves may break hydrogen bonds in DNA molecules or alter the arrangement of base pairs, leading to errors or failure in DNA replication. During transcription, far-infrared waves may also interfere with the binding of RNA polymerase to the DNA template, affecting mRNA synthesis and thus preventing bacteria from synthesizing the proteins required for growth and reproduction, thereby inhibiting bacterial growth and reproduction.

[0005] Generally, when the ambient temperature of tourmaline increases, the thermal motion of its internal particles intensifies, causing tourmaline to release far-infrared rays. Tourmaline can usually release far-infrared rays at room temperature, but its ability to release far-infrared rays is enhanced when the temperature is appropriately raised to around 30℃-60℃. This temperature range is suitable for the use of various Jianshui purple pottery products as teaware, tableware, etc., giving it a natural advantage as a raw material for Jianshui purple pottery. Summary of the Invention

[0006] The purpose of this invention is to provide a composite purple clay material with negative ion release function and its preparation method. By adding tourmaline and auxiliary materials, the far-infrared emission performance of the finished product of Jianshui purple clay material is improved while ensuring that the plasticity of the molding is not significantly affected, the fineness of the finished product and the breathable structure are guaranteed. In addition to the advantage of releasing mineral ions inherent in Jianshui purple clay, it also has certain antibacterial properties of releasing negative ions.

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

[0008] Preferably, the purple clay is composed of the following raw materials by weight percentage: 54% variegated clay, 11% yellow clay, 10% white clay, 11% gray clay, and 14% 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 for terracotta, 300 mesh for tourmaline, 400 mesh for feldspar, and 400 mesh for silica powder.

[0011] Preferably, the method for preparing the mud material involves mixing the main material and water at a ratio of 1:0.8, stirring thoroughly to ensure uniform mixing, and removing impurities by passing the mixture through a 200-mesh sieve. The mixture is then pressed into mud cakes using a filter press, and the mud cakes are fed into a mud refining machine for refining to prepare a raw material with a moisture content of 20-25%.

[0012] Preferably, the mud is processed three times by a mud plow. During the mud plowing process, the extrusion pressure at the discharge port of the mud plow is controlled. In the first two mud plowing processes, the extrusion pressure at the discharge port of the mud plow is increased and gradually decreased in the second two processes. In the third mud plowing process, the extrusion pressure at the discharge port of the mud plow returns to normal.

[0013] Preferably, the extrusion pressure of the discharge cylinder of the pumice machine is controlled by an outlet pressure regulating device disposed between the extrusion cylinder and the discharge cylinder of the pumice machine; the outlet pressure regulating device includes a connecting cylinder and a pressure cylinder disposed on the upper part of the connecting cylinder, the two ends of the connecting cylinder are respectively connected to the extrusion cylinder and the discharge cylinder, and the pressure cylinder is connected to the connecting cylinder; a pressing plate that can move along the vertical direction of the pressure cylinder is disposed inside the pressure cylinder, and the pressing plate is driven by a driving mechanism.

[0014] Preferably, the connecting cylinder includes an inner cylinder and an outer cylinder, and the inner cylinder and the outer cylinder form an annular cavity, which is connected to the pressure cylinder; the side wall of the inner cylinder is uniformly provided with a plurality of strip-shaped holes extending along the length direction of the inner cylinder in an annular shape, and the annular cavity is connected to the inner cylinder through the strip-shaped holes.

[0015] Preferably, a pressure nozzle is provided on the inner wall of the inner cylinder corresponding to the strip hole. The pressure nozzle extends along the length of the strip 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 disposed in the upper section of the pressure cylinder, the upper end of the screw being connected to a drive motor disposed at the top of the pressure cylinder; a drive sleeve is disposed on the outer sleeve of the screw, the drive sleeve being threadedly engaged with the screw, and the drive sleeve being fixedly connected to the mud-pressing plate via a crank arm.

[0017] Preferably, the drive sleeve includes a main sleeve sleeved on the outside of the screw and threadedly engaged with the screw, and a secondary sleeve sleeved on the lower end of the main sleeve and rotatably engaged with the main sleeve, wherein the secondary sleeve is connected to the crank arm;

[0018] The inner wall of the sub-sleeve is provided with a number of circular holes that extend radially along the sub-sleeve. Each hole contains a pin with hemispherical ends. The outer wall of the main sleeve is provided with a hemispherical groove opposite to the pin.

[0019] The top of the secondary sleeve is provided with an annular groove extending downward from the upper end face, and the annular groove is closed by a cover plate provided on the top of the secondary sleeve. A vertical adjusting bolt is provided on the cover plate opposite to the annular groove, and the adjusting bolt is threaded into the cover plate. A pressure ring and a set of butterfly springs are arranged sequentially from top to bottom in the annular groove. A pressure ring is also provided below the butterfly springs at a position corresponding to the pin. The adjusting bolt presses the outer end of the pin by squeezing the pressure ring, butterfly springs and pressure ring, and causes the pin to extend into the groove on the main sleeve.

[0020] Preferably, an air inlet is provided on one side of the upper part of the pressure cylinder, which communicates with the inside of the pressure cylinder, and the air inlet is connected to the exhaust port of the vacuum device of the pumice machine through a pipeline.

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

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

[0023] The beneficial effects of this invention are concentrated in the following aspects: adding tourmaline and feldspar to Jianshui purple pottery clay significantly enhances its ability to release infrared rays, far-infrared rays, and negative ions. Tourmaline, with its unique crystal structure and polarity, releases far-infrared rays through internal thermal vibrations when excited by external energy; its pyroelectric and piezoelectric properties ionize air to generate negative ions. Feldspar, under the influence of external energy, undergoes internal electron transitions, combining with oxygen molecules to form negative ions, and also promotes infrared ray release to a certain extent. The addition of these two materials to Jianshui purple pottery clay not only endows it with health benefits—far-infrared rays promoting blood circulation and enhancing metabolism, and negative ions having antibacterial properties and improving bodily functions—but also enriches the functionality and product value of Jianshui purple pottery, bringing new development directions and application prospects. Attached Figure Description

[0024] Figure 1 This is a flowchart of the process flow of the present invention;

[0025] Figure 2 A schematic diagram of the discharge port of an existing plywood mill;

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

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

[0028] Figure 5 This is a schematic diagram of the end structure of the pressure nozzle. Detailed Implementation

[0029] This invention relates to a composite purple clay material with negative ion release function and its preparation method. This clay material is mainly used for making Jianshui purple clay products such as teaware and kitchenware. Under the premise of ensuring no significant impact on molding plasticity, ensuring the fineness and breathability of the finished product, it improves the far-infrared emission performance of the finished product produced by Jianshui purple clay material. In addition to the advantage of releasing mineral ions inherent in Jianshui purple clay, it also has certain antibacterial properties of releasing negative ions.

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

[0031] Example 1

[0032] A composite purple clay material with negative ion release function is formulated by mixing and stirring the main ingredients and water. The main ingredients are composed of the following raw materials in weight percentage: 80% 300 mesh purple clay, 13% 300 mesh tourmaline, 3% 400 feldspar, and 4% 400 mesh silica powder. The purple clay is composed of the following raw materials in weight percentage: 54% multicolored clay, 11% yellow clay, 10% white clay, 11% gray clay, and 14% purple clay.

[0033] like Figure 1 As shown, the overall preparation process of the mud material of the present invention is as follows: the main material and water are mixed at a ratio of 1:0.8, stirred thoroughly to ensure uniform mixing, and impurities are removed by passing through a 200-mesh sieve; the mixture is then pressed into mud cakes using a filter press, and the mud cakes are fed into a mud refining machine for refining three times to prepare a raw material with a moisture content of 20-25%. The mud refining machine is a ZL-350 vacuum mud refining machine manufactured by Hebi Helong Special Equipment Co., Ltd., and the extrusion pressure at the discharge port was measured to be 1.2 MPa during the extrusion of the above mud material.

[0034] Example 2

[0035] Similar to Example 1, the difference lies in the following: during the plowing process, the plow is plowed three times using a plow mill. The extrusion pressure at the plow mill's outlet is controlled during the plowing process. For the first two plowing cycles, the extrusion pressure at the outlet is increased, gradually decreasing each time. No pressure is applied during the third plowing cycle, and the outlet pressure returns to normal. The pressure is increased for the first two cycles at 1.6 MPa and 1.4 MPa, and for the third at 1.2 MPa.

[0036] Comparative Example 1

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

[0038] Comparative Example 2

[0039] The preparation method is the same as in Example 1, except that the main ingredients are: 70% terracotta, 23% tourmaline, 3% feldspar, and 4% silica fume.

[0040] Comparative Example 3

[0041] The preparation method is the same as in Example 1, except that the main ingredients are: 60% terracotta, 23% tourmaline, 13% feldspar, and 4% silica fume.

[0042] Comparative Example 4

[0043] The preparation method is the same as in Example 1, except that the main ingredients are: 90% kaolin, 56% kaolin clinker, and 4% silica powder.

[0044] Plasticity test: Plasticity analysis was performed on the clay materials prepared in Examples 1-2 and Comparative Examples 1-4. During the analysis, a cylindrical sample with a diameter of 2 cm and a length of 20 cm was cut from the clay material through a sampling tube. The two ends of the sample were held and bent back and forth in a circular motion. The plasticity score was determined based on the fracture and surface crack conditions. A sample that could be bent back and forth more than 10 times without fracture or crack was considered excellent. A sample that could be bent back and forth 5-10 times without fracture or crack was considered qualified. A sample that could be bent back and forth less than 5 times with fracture or crack was considered unqualified (poor plasticity). The results are detailed in Table 1 below.

[0045] Porosity Test: The clay materials from Examples 1-2 and Comparative Examples 1-4 were shaped using traditional methods and sintered into 20 ceramic cups with a diameter of 5 cm each; the porosity was then tested. A total of 100 samples were weighed in air, then completely immersed in water to fill the pores. The surface water was wiped dry with a towel, and the samples were weighed again. Based on the two weighing data and the density of water, the volume of water in the sample was calculated, i.e., the pore volume. Finally, the porosity was calculated, and the average porosity of the 20 samples in each example or comparative example was used as the final data (rounded to one decimal place). The results are detailed in Table 1 below.

[0046] Yield test: 100 ceramic cup samples were made from the clay of Examples 1-2. They were shaped and sintered using traditional methods. The defects of the 100 ceramic cups of Examples 1 and 2 were judged. Uneven surface, small particles, small air bubbles, etc. were considered defective products. The yield rate was statistically analyzed. The results are shown in Table 1 below.

[0047] Table 1. Statistical table of plasticity and thermal shock resistance of 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 described in this invention has no difference in plasticity compared to traditional Jianshui purple pottery clay material (Comparative Example 4), and has no significant impact on molding. It has the advantages of fine texture and good air permeability of Jianshui purple pottery clay material, and the yield rate is excellent after controlling the pressure during the clay preparation process.

[0050] Far-infrared radiation test: Place the sample in a constant temperature chamber and set different temperatures, 30℃, 40℃, and 50℃. After the temperature stabilizes, use a far-infrared tester to measure the far-infrared radiation power and wavelength range of the sample surface at different temperatures. Measure multiple times at each temperature point and take the average value. The results are detailed in Table 2 below (average values ​​of each sample in the same embodiment or comparative example).

[0051] Negative ion release test: The sample was placed in a sealed container and left for a period of time to allow the release of negative ions inside to reach a stable state. Then, a negative ion detector was inserted into the container to 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. (Average values ​​of each sample in the same embodiment or comparative example)

[0052] Table 2. Statistical table of far-infrared radiation and negative ion release of samples from Example 2 and Comparative Example 4

[0053] Test metrics Test conditions Example 2 Comparative Example 4 Difference Far-infrared emissivity 30℃ 85.3% 64.2% 21.1% Far-infrared emissivity 40℃ 92.6% 66.8% 25.8% Far-infrared emissivity 50℃ 94.7% 69.7% 25.0% Far-infrared radiation peak wavelength 30℃ 9.8um 11.2um -1.4um Negative ion release concentration Sealed for 1 hour <![CDATA[1244ion / cm 3 ]]> <![CDATA[187ion / cm 3 ]]> <![CDATA[1057ion / cm 3 ]]> Negative ion release concentration Sealed 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] As can be seen from Table 2, the Jianshui purple pottery products prepared with the clay described in this invention have significantly improved far-infrared emissivity and negative ion release capacity compared with Jianshui purple pottery products made with traditional clay.

[0055] In addition, by using a clay refining machine to refinish the clay three times and controlling the pressure, the overall yield of the finished products is excellent. The inventor believes the reason is as follows: Because Jianshui purple pottery has a fine and dense texture, it is more difficult for air inside the clay blank to be expelled during the refining process. It is necessary to use a vacuum clay refining machine to refinish the clay multiple times, otherwise, pore defects will easily appear in the clay, affecting the quality of the final product. By increasing the extrusion pressure at the discharge port of the clay refining machine, combined with multiple refining processes, the density of the clay can be improved, which helps to expel the gas inside the clay and reduces internal pore defects.

[0056] This invention employs a three-stage plowing process, with pressurization at the discharge port during the first two stages. This serves two purposes: firstly, it aids in the expulsion of gas from the plow, improving its density and eliminating potential porosity defects later on; secondly, during the final plowing stage, the normal discharge pressure of the plowing machine is used. Since the plow is re-entering the plowing machine after pressurization and degassing, where it is crushed and conveyed by the augers, although there is a risk of secondary porosity at this stage, this impact is negligible due to the vacuum system's protection during the plowing process. Instead, this method of restoring atmospheric pressure helps recover from overpressure defects, restoring the plow's plasticity and uniformity, and reducing the risk of uneven particle formation. Through its rational and effective processing steps, this invention significantly ensures a high final product yield.

[0057] Of course, while theoretically reducing the size of the discharge port can significantly increase extrusion pressure and reduce porosity defects in the clay blank, this method is not universally applicable due to the size requirements of the clay blank during shaping. Furthermore, frequent changes to the discharge port increase operational complexity. Increasing the spindle speed to increase pressure would increase the output power of the main motor, posing a risk of burnout. Simply replacing the machine with a high-powered new one would also impose a significant economic burden on the company, making it impractical. Therefore, how to achieve a pressure-boosting effect by modifying existing plowshares is a crucial issue. To address this, this invention discloses a plowshare outlet pressure regulating device suitable for modifying existing models and effectively controlling the discharge port pressure. This device, positioned between the plowshare extrusion cylinder and the discharge port, controls the extrusion pressure at the plowshare outlet.

[0058] The discharge port of the existing plowing machine is like Figure 2 As shown, the extrusion cylinder 3 and the discharge cylinder 4 are directly connected by a flange. The pressure regulating device described in this invention is as follows: Figure 3-5 As shown, the outlet pressure regulating device includes a connecting cylinder 1 and a pressure cylinder 2 disposed on the upper part of the connecting cylinder 1. It is installed between the extrusion cylinder 3 and the discharge cylinder 4, and can adapt to the installation requirements of various machine models. Both ends of the connecting cylinder 1 are connected to the extrusion cylinder 3 and the discharge cylinder 4 respectively, and the pressure 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 a direct flange connection; that is, flanges are provided at both ends of the connecting cylinder 1, and the connecting cylinder 1 is connected to the extrusion cylinder 3 and the discharge cylinder 4 through the flanges. To ensure a tight connection, a sealing gasket can be added between the two flanges. In addition, to facilitate the entry of mud from the extrusion cylinder 3 into the connecting cylinder 1, a stepped surface corresponding to the inner cavity of the extrusion cylinder 3 is formed at the end of the connecting cylinder 1 near the extrusion cylinder 3. A sealing ring 27 with a triangular cross-section is provided on the stepped surface.

[0059] The pressurizing cylinder 2 is equipped with a mud-pressing plate 5 that can move vertically along the pressurizing cylinder 2. The mud-pressing plate 5 is driven by a drive mechanism. There are many specific structures for the drive mechanism. From the perspective of implementation, it can be, for example, a hydraulic cylinder (simple to control, but relatively expensive) or a pneumatic cylinder (simple to control, but relatively poor extrusion force, requires special customization, and the pressurization is not stable enough).

[0060] Initially, the discharge port of discharge cylinder 4 is sealed with a plug. After the pumice mill's main shaft compresses and fills the lower section of discharge cylinder 4, connecting cylinder 1, and pressure cylinder 2 with the slurry, the plug is opened, and normal discharge occurs. The pressure at the discharge port is detected by a pressure sensor installed inside discharge cylinder 4. During pressurization, the drive mechanism controls the pressing plate 5 to press down, and the pumice mill's main shaft together compresses the slurry, thus achieving the purpose of pressurization. This type of pressure regulating device facilitates the modification of existing equipment for discharge port pressure control without significantly increasing the economic burden on enterprises.

[0061] To ensure a more even distribution of pressure from the pressing plate 5 onto the mud at the connecting cylinder 1 and the discharge cylinder 4, the connecting cylinder 1 can consist of an inner cylinder 6 and an outer cylinder 7, typically assembled in a detachable manner for easy disassembly and cleaning after use, facilitating reuse. The inner cylinder 6 and outer cylinder 7 form an annular cavity 8, which communicates with the pressure cylinder 2. The side wall of the inner cylinder 6 has a plurality of uniformly arranged strip-shaped holes 9 extending along its length in a ring shape, and the annular cavity 8 communicates with the inner cylinder 6 through these holes. This allows the mud to be squeezed inwards from the circumference through the annularly distributed strip-shaped holes 9, resulting in better overall compression uniformity. Generally, 4-6 strip-shaped holes 9 are sufficient; too many would be detrimental to the overall structural strength of the inner cylinder 6.

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

[0063] Regarding the specific form of the drive mechanism, one feasible solution is as follows: Figure 3As shown, the driving mechanism of the present invention includes a screw 11 disposed in the upper section of the pressure cylinder 2. The upper end of the screw 11 is connected to a drive motor 12 disposed at the top of the pressure cylinder 2. A drive sleeve 13 is sleeved on the screw 11, and the drive sleeve 13 is threadedly engaged with the screw 11. The drive sleeve 13 is fixedly connected to the pressing plate 5 via a crank arm 14. The drive motor 12 continuously outputs power to the screw 11, and the screw 11 drives the pressing plate 5 downward through the drive sleeve 13 and the crank arm 14. At this time, the pressure 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 control the pressure and protect the drive motor 12 by limiting the pressure, the drive sleeve 13 of the present invention can disengage the power when the pressure exceeds the set pressure, and can connect the power when the pressure is insufficient, so as to drive the pressing plate 5 to continue to press down.

[0064] Therefore, such as Figure 4 As shown, the drive sleeve 13 includes a main sleeve 15 that is sleeved on the outside of the screw 11 and has a threaded engagement with the screw 11, and a secondary sleeve 16 that is sleeved on the lower end of the main sleeve 15 and has a rotatable engagement with the main sleeve 15. The secondary sleeve 16 is connected to the crank arm 14.

[0065] The structure for achieving power connection and power release is as follows: A plurality of circularly arranged post holes 17 extending radially along the inner wall of the secondary sleeve 16 are uniformly arranged on the inner sidewall; each post hole 17 contains a pin 18 with hemispherical ends; a hemispherical groove 19 is provided on the outer sidewall of the main sleeve 15 opposite to the pin 18; the top of the secondary sleeve 16 has an annular groove 20 extending downward from its upper end face, and the annular groove 20 is closed by a cover plate 21 located on the top of the secondary sleeve 16. A vertical adjusting bolt 22 is provided on the cover plate 21 at a position opposite to the annular groove 20. The adjusting bolt 22 is threadedly engaged with the cover plate 21. A pressure ring 23 and a set of butterfly spring pieces 24 are arranged sequentially from top to bottom in the annular groove 20. A pressure ring 25 is also provided below the butterfly spring pieces 24 at a position corresponding to the pin 18. The adjusting bolt 22 presses the outer end of the pin 18 by squeezing the pressure ring 23, the butterfly spring pieces 24 and the pressure ring 25, and causes the pin 18 to extend into the slot 19 on the main sleeve 15.

[0066] When the pressure is insufficient, the screw 11 continuously drives the drive sleeve 13, which in turn drives the mud-pressing plate 5 downwards via the crank arm 14. When the power reaches the set value (set via the adjusting bolt 22), the drive sleeve 13 cannot continue to move downwards 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, pushing the pin 18 back from the slot 19 into the pin hole 17, thus disengaging the main sleeve 15 and the auxiliary sleeve 16, achieving power release. When pressure adjustment is required, the side door on the upper section of the pressure cylinder 2 can be opened, and the adjusting bolt 22 can be turned.

[0067] Based on this, in order to further improve the performance of the pressurization regulating device, an air inlet 26 is provided on one side of the upper part of the pressurization cylinder 2, which communicates with the interior of the pressurization cylinder 2. The air inlet 26 is connected to the exhaust port of the vacuum device of the pumice machine through a pipeline. By connecting the air inlet 26 to the exhaust port of the vacuum device, the pressurized air pumped by the vacuum device can be used to pressurize the interior of the pressurization cylinder 2, thereby increasing the internal pressure of the pressurization cylinder 2 and reducing the load on the drive motor 12 and the pumice plate 5 to a certain extent.

Claims

1. A method for preparing a composite purple clay material having a negative ion releasing function, characterized in that, The main material is mixed with water and stirred; The main material is composed of raw materials with the following weight percentage: purple pottery clay 80%, tourmaline 13%, feldspar 3%, and silicon powder 4%; The purple pottery clay is composed of raw materials with the following weight percentage: five-color clay 54%, loess 11%, white clay 10%, gray clay 11%, and purple clay 14%; The particle size of each raw material in the main material is: purple pottery clay 300 mesh, tourmaline 300 mesh, feldspar 400 mesh, and silicon powder 400 mesh; The main material and water are mixed in a ratio of 1:0.8, stirred thoroughly to make them uniform, and then screened through a 200-mesh sieve to remove impurities; the mixture is then filtered through a filter press to form a mud cake, which is then fed into a mud mill to prepare a green body with a moisture content of 20-25%; The mud mill is used three times, and the extrusion pressure of the discharge port of the mud mill is controlled during the process; the extrusion pressure of the discharge port of the mud mill is increased in the first two times of mud milling, and then gradually decreased; the extrusion pressure of the discharge port of the mud mill returns to normal in the third time of mud milling; The extrusion pressure of the discharge port of the mud mill is controlled by the outlet pressure adjusting device arranged between the extrusion cylinder (3) and the discharge port of the mud mill; The outlet pressure adjusting device includes a connecting cylinder (1) and a pressurizing cylinder (2) arranged on the upper part of the connecting cylinder (1); the two ends of the connecting cylinder (1) are respectively connected with the extrusion cylinder (3) and the discharge cylinder (4); the pressurizing cylinder (2) is connected with the connecting cylinder (1); a mud pressing plate (5) capable of moving vertically in the pressurizing cylinder (2) is arranged in the pressurizing cylinder (2); the mud pressing plate (5) is driven by a driving mechanism; The connecting cylinder (1) includes an inner cylinder (6) and an outer cylinder (7); an annular cavity (8) is formed between the inner cylinder (6) and the outer cylinder (7), and the annular cavity (8) is connected with the pressurizing cylinder (2); a plurality of strip-shaped holes (9) extending along the length direction of the inner cylinder (6) are uniformly arranged on the side wall of the inner cylinder (6) in a ring shape; the annular cavity (8) is connected with the inner cylinder (6) through the strip-shaped holes (9); The driving mechanism includes a screw rod (11) arranged in the upper section of the pressurizing cylinder (2); the upper end of the screw rod (11) is connected with a driving motor (12) arranged on the top of the pressurizing cylinder (2); a driving sleeve (13) is arranged on the outer sleeve of the screw rod (11); the driving sleeve (13) is threadedly connected with the screw rod (11), and the driving sleeve (13) is fixedly connected with the mud pressing plate (5) through a crank arm (14); The driving sleeve (13) includes a main sleeve (15) arranged on the outer sleeve of the screw rod (11) and threadedly connected with the screw rod (11), and a secondary sleeve (16) arranged on the lower end of the main sleeve (15) and rotationally connected with the main sleeve (15); the secondary sleeve (16) is connected with the crank arm (14); A plurality of column holes (17) extending along the radial direction of the secondary sleeve (16) are uniformly arranged on the inner side wall of the secondary sleeve (16) in a ring shape; a pin column (18) with hemispherical ends is arranged in the column hole (17); a hemispherical clamping groove (19) is arranged on the outer side wall of the main sleeve (15) at a position opposite to the pin column (18). The top of the auxiliary sleeve (16) is provided with a ring groove (20) extending downward from the upper end face, and the ring groove (20) is closed by a cover plate (21) provided on the top of the auxiliary sleeve (16), the cover plate (21) is provided with a vertical adjusting bolt (22) at a position opposite to the ring groove (20), the adjusting bolt (22) is in threaded cooperation with the cover plate (21); a pressing ring (23) and a group of butterfly elastic pieces (24) are sequentially arranged in the ring groove (20) from top to bottom, a pressing ring (25) is further arranged at a position corresponding to the pin column (18) below the butterfly elastic pieces (24), the adjusting bolt (22) extrudes the pressing ring (23), the butterfly elastic pieces (24) and the pressing ring (25) to press the outer end of the pin column (18), and the pin column (18) is inserted into the clamping groove (19) on the main sleeve (15).

2. A composite purple clay material having a negative ion releasing function, characterized in that, The method is prepared according to claim 1.

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