Ceramic roller bar forming device and ceramic helical tooth roller bar

Abstract

The application discloses a ceramic roller bar forming equipment and a ceramic helical tooth roller bar, and relates to the technical field of ceramic roller bar processing. The ceramic roller bar forming equipment comprises a machine cylinder, a feeding port is arranged on the machine cylinder, a forming die is arranged at the first end of the machine cylinder, a forming cavity matched with the outer contour of the ceramic roller bar is arranged in the forming die, and an inclined convex rib is arranged on the inner wall of the forming cavity. A machine core is arranged in the machine cylinder, the machine core comprises a core disc and a core shaft, the core disc is in abutment with the side of the forming die close to the machine cylinder, and the core shaft extends into the forming cavity. A driving assembly is arranged for extruding the ceramic raw material in the machine cylinder to one side of the machine core, so that the ceramic raw material flows through the gap between the machine core and the forming die and is continuously extruded from the outlet of the forming die to form a ceramic roller bar blank body with a thread structure on the surface. A lifting assembly is arranged for making the machine cylinder present a certain inclination angle relative to the horizontal ground. The blank body directly forms the thread structure through the inclined convex rib, and secondary processing is not needed. The lifting assembly is arranged in an inclined mode, so that the straightness and roundness of the blank body are ensured.

Description

Technical Field

[0001] This invention relates to the field of ceramic roller processing technology, and in particular to a ceramic roller forming equipment and a ceramic helical tooth roller. Background Technology

[0002] Ceramic rollers are core components in ceramic production equipment such as roller kilns, used to support and transport ceramic blanks. Traditional ceramic rollers typically have a smooth surface, which, under high-speed operation or heavy loads, can easily lead to insufficient friction, causing the blanks to slip or shift, affecting transport accuracy and stability. Furthermore, smooth surfaces on rollers are prone to glaze and blank residue buildup during use, requiring frequent cleaning; otherwise, the residue will affect the surface quality of subsequent blanks or accelerate roller wear. In the high-temperature kiln environment, smooth rollers, due to their limited surface area, have weak heat dissipation capacity and are prone to fracture or deformation due to concentrated thermal stress.

[0003] To address this, existing technologies have proposed improvements by incorporating threads or grooves on the surface of the roller. Forming helical patterns on the roller surface increases friction between the roller and the blank, improving transmission stability; the threaded grooves facilitate airflow and heat dissipation, improving heat dissipation performance; simultaneously, the thread gaps can accommodate small amounts of glaze and impurities, reducing the risk of adhesion. However, existing ceramic helical tooth rollers still have many shortcomings in practical applications. The threaded structure on their surface is mostly formed through secondary machining on the sintered roller surface. This not only increases production steps and costs, but more importantly, secondary machining easily generates microcracks on the roller surface. These microcracks gradually expand in the high-temperature kiln environment, leading to roller breakage during use and severely shortening the roller's service life. Furthermore, secondary machining is a form of subtractive manufacturing, which is inefficient and results in high tool wear for hard and brittle materials like ceramics, making it difficult to produce high-precision thread shapes. Some technologies have attempted to use extrusion molding to prepare ceramic rollers, but the inner wall of the forming die is a smooth surface, resulting in a smooth-surfaced roller that cannot directly form a threaded structure on the blank. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a ceramic roller forming equipment and a ceramic helical tooth roller, so as to solve the technical problems of existing threaded ceramic rollers relying on secondary processing, lacking dedicated forming equipment, having low production efficiency, and having difficulty in guaranteeing product quality, as well as the technical problems of existing ceramic rollers having insufficient heat dissipation capacity in high-temperature kiln environments and thermal stress concentration leading to fracture or deformation.

[0005] To address the aforementioned technical problems, the present invention provides, in a first aspect, a ceramic roller forming apparatus, comprising: a barrel for containing ceramic raw materials, the barrel having a feed inlet; a forming mold installed at a first end of the barrel, the forming mold having a forming cavity matching the outer contour of the ceramic roller, the inner wall of the forming cavity having inclined protrusions circumferentially arranged, the inclined protrusions being used to form inclined grooves on the surface of the extruded ceramic roller blank; and a core disposed within the barrel, the core including a core disk and a core shaft, the core disk being close to the forming mold. One side of the cylinder abuts against the mandrel, which extends into the forming cavity; the drive assembly, fixed to the second end of the cylinder, is used to squeeze the ceramic raw material in the cylinder toward one side of the mandrel, so that the ceramic raw material flows through the gap between the mandrel and the forming mold and is continuously extruded from the outlet of the forming mold to form a ceramic roller blank with a threaded structure on the surface; the support core abuts against the side of the mandrel away from the mandrel, and is used to receive the extruded blank; the lifting assembly is connected to the cylinder, so that the cylinder is tilted at a certain angle relative to the horizontal ground.

[0006] As an improvement to the above solution, the inner wall of the molding die is provided with a plurality of inclined protrusions. The inclined protrusions are inclined relative to the axial direction of the molding die, and the plurality of inclined protrusions are arranged at intervals along the axial direction of the molding die to form a spiral pattern on the inner wall of the molding die. The inclination angle of the inclined protrusions relative to the axial direction of the molding die is 1° to 89°.

[0007] As an improvement to the above solution, the drive assembly includes: a power unit disposed at the second end of the barrel; and an extrusion pusher disposed inside the barrel, wherein the extrusion pusher is connected to the power output end of the power unit.

[0008] As an improvement to the above solution, the core plate of the mechanism is provided with a feeding hole, and the ceramic raw material in the barrel flows into the gap between the mechanism and the molding die through the feeding hole.

[0009] As an improvement to the above solution, the lifting component is a lifting machine, which is connected to the outer wall of the machine cylinder and is used to lift the machine cylinder so that it is inclined at a certain angle relative to the horizontal ground.

[0010] As an improvement to the above solution, the supporting core is a hollow tube, and the outer surface of the supporting core is coated with a lubricating substance.

[0011] As an improvement to the above solution, the forming equipment further includes a cutting assembly disposed on the outer wall of the first end of the barrel, which is used to cut the blank after extruding a blank of a predetermined length.

[0012] As an improvement to the above solution, the molding equipment further includes a temperature control component, which includes: a cooling element disposed on the barrel for cooling the barrel and the molding die; and a temperature sensor disposed on the barrel and / or the molding die for monitoring the temperature.

[0013] As an improvement to the above solution, the molding equipment also includes a vacuum pump, which is connected to the inside of the barrel and is used to discharge gas from the ceramic raw material.

[0014] In a second aspect, the present invention provides a ceramic helical toothed roller, which is manufactured using the aforementioned ceramic roller forming equipment. The ceramic helical toothed roller includes a roller body and a plurality of helical grooves formed on the outer surface of the roller body. The helical grooves are inclined relative to the axial direction of the roller body, and the plurality of helical grooves are spaced apart along the axial direction of the roller body, so that the outer surface of the roller body forms a spiral pattern.

[0015] As an improvement to the above scheme, the inclination angle of the inclined groove relative to the axis of the main body of the roller is 1°~89°.

[0016] As an improvement to the above solution, the spiral pattern is formed by arranging multiple oblique grooves at intervals, and the multiple oblique grooves form a left-hand thread or a right-hand thread on the outer surface of the roller body.

[0017] As an improvement to the above scheme, the cross-sectional shape of the inclined groove is V-shaped, U-shaped, or trapezoidal.

[0018] As an improvement to the above solution, the cross-section of the inclined groove is trapezoidal or fan-shaped, the width of the side of the cross-section closer to the center of the roller body is smaller than the width of the side farther from the center of the roller body, and the bottom of the inclined groove is a plane or a curved surface.

[0019] As an improvement to the above solution, the depth of the inclined groove is 0.2mm~5mm, the width is 1mm~8mm, and the spacing between adjacent inclined grooves is 0.5mm~20mm.

[0020] As an improvement to the above solution, the plurality of the inclined grooves are arranged at equal intervals along the axial direction of the roller body.

[0021] As an improvement to the above solution, the inclined groove and the main body of the roller are integrally formed.

[0022] As an improvement to the above solution, the main body of the roller is made of alumina or silicon nitride.

[0023] As an improvement to the above solution, the two ends of the inclined groove extend to the two ends of the roller body, and the inclined groove forms openings at the end faces of the two ends of the roller body.

[0024] The beneficial effects of implementing this invention are as follows: This invention discloses a ceramic roller forming device. By setting inclined protrusions on the inner wall of the forming cavity of the forming mold, the green body directly forms an inclined groove structure during the extrusion process. This fundamentally avoids the risk of micro-cracks caused by secondary machining, significantly extends the service life of the roller, simplifies the production process, and reduces manufacturing costs. By using a lifting component to tilt the barrel relative to the horizontal ground, the extruded green body moves smoothly along the inclined support tube under its own gravity, effectively ensuring the straightness and roundness of the green body. This overcomes the defect of bending and deformation of the green body caused by uneven gravity distribution in horizontal extrusion equipment, and greatly improves the dimensional accuracy and forming quality of the product.

[0025] This invention discloses a ceramic helical toothed roller. The helical grooves on the roller surface increase the heat dissipation area, improve air circulation and heat dissipation, and make the thermal stress distribution of the roller more uniform under high-temperature environments. This effectively reduces local overheating, lowers the risk of roller deformation or damage caused by thermal stress, and improves thermal stability. At the same time, the helical grooves increase the friction between the roller and the blank, improving transmission stability. The gaps can also accommodate a small amount of glaze and impurities, reducing the risk of adhesion and facilitating cleaning and maintenance. The threaded structure also enhances the moment of inertia of the roller section to a certain extent, improving bending strength and load-bearing capacity, enabling it to withstand heavier blanks or heavier loads. By adjusting the thread parameters, it can also adapt to blanks or loads of different specifications and shapes, thus broadening its applicability. In summary, the ceramic helical toothed roller of this invention achieves significant improvements in heat dissipation performance, thermal stability, transmission stability, anti-adhesion properties, bending strength, and application flexibility. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of a ceramic roller forming device according to an embodiment of this application; Figure 2 This is a structural cross-sectional view of a ceramic roller forming device according to an embodiment of this application; Figure 3 This is a structural cross-sectional view of the forming mold of a ceramic roller forming equipment according to an embodiment of this application; Figure 4 This is a schematic diagram of the structure of the core of a ceramic roller forming device according to an embodiment of this application; Figure 5 This is a schematic diagram of the structure of a ceramic roller in an embodiment of this application.

[0027] Figure 6 This is a schematic diagram of the structure of a left-handed ceramic helical toothed roller in an embodiment of this application; Figure 7This is a schematic diagram of the structure of a right-handed ceramic helical toothed roller bar in an embodiment of this application; Figure 8 This is a side view of a ceramic helical toothed roller according to an embodiment of this application.

[0028] The reference numerals in the attached drawings are explained as follows: 100, barrel; 110, feed inlet; 200, forming die; 210, inclined ridge; 300, core; 310, core disc; 311, feed hole; 320, mandrel; 400, drive assembly; 410, power unit; 420, extrusion pusher; 500, support core; 600, lifting assembly; 700, controller; 810, ceramic roller blank; 820, roller body; 830, inclined groove; 910, cutting assembly; 921, cooling component; 922, temperature sensor; 930, vacuum pump. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings.

[0030] See Figures 1-2 , Figure 1 This is a schematic diagram of the structure of a ceramic roller forming device according to an embodiment of this application; Figure 2This is a structural cross-sectional view of a ceramic roller forming device according to an embodiment of this application. As shown in the figure, the device includes: a barrel 100 for containing ceramic raw materials, the barrel 100 having a feed inlet 110; a forming mold 200 installed at the first end of the barrel 100, the forming mold 200 having a forming cavity matching the outer contour of the ceramic roller, the inner wall of the forming cavity having an inclined protrusion 210, the inclined protrusion 210 being used to form an inclined groove 830 on the surface of the extruded ceramic roller blank 810; and a core 300 disposed within the barrel 100, the core 300 including a core disk 310 and a core shaft 320, the core disk 310 abutting against the side of the forming mold 200 near the barrel 100. The mandrel 320 extends into the forming cavity; the drive assembly 400, fixed to the second end of the barrel 100, is used to squeeze the ceramic raw material in the barrel 100 toward one side of the mandrel 300, so that the ceramic raw material flows through the gap between the mandrel 300 and the forming mold 200 and is continuously extruded from the outlet of the forming mold 200 to form a ceramic roller blank 810 with a threaded structure on the surface; the support core 500 abuts against the side of the mandrel 320 away from the core plate 310, and is used to receive the extruded blank; the lifting assembly 600 is connected to the barrel 100, so that the barrel 100 is tilted at a certain angle relative to the horizontal ground; the controller 700 is used to control the operating parameters of the ceramic roller forming equipment. By setting inclined ribs 210 on the inner wall of the forming cavity of the forming mold 200, the preform directly forms an inclined groove structure during the extrusion process, which fundamentally avoids the risk of micro-cracks caused by secondary machining, significantly extends the service life of the rollers, simplifies the production process, and reduces manufacturing costs. By using the lifting component 600 to tilt the barrel 100 relative to the horizontal ground, the extruded preform moves smoothly along the inclined support tube 500 under its own gravity, effectively ensuring the straightness and roundness of the preform, overcoming the defect of bending and deformation of the preform caused by uneven gravity distribution in horizontal extrusion equipment, and greatly improving the dimensional accuracy and forming quality of the product.

[0031] See Figure 2 and Figure 3 , Figure 3 This is a structural cross-sectional view of the forming mold of a ceramic roller forming equipment according to an embodiment of this application; Furthermore, in this embodiment, the inclined protrusion 210 on the inner wall of the molding mold 200 is inclined relative to the axis of the molding mold 200, with an inclination angle of 10°~30°, preferably 15°. By limiting the angle of the inclined protrusion 210, the groove structure formed within this angle range is clear and regular, the blank is demolded smoothly, and the molding quality is good.

[0032] Specifically, the inner wall of the forming mold 200 is provided with a plurality of inclined protrusions 210. These inclined protrusions 210 are inclined relative to the axial direction of the forming mold 200, and are spaced apart along the axial direction of the forming mold 200, forming a spiral pattern on the inner wall of the forming mold 200. The inclination angle of the inclined protrusions 210 relative to the axial direction of the forming mold 200 is 10° to 30°. The cross-sectional shape of the inclined protrusions 210 can be V-shaped, U-shaped, or trapezoidal. The height of the protrusions is preferably 1 to 5 mm, the width is preferably 2 to 8 mm, and the spacing between adjacent protrusions is preferably 5 to 20 mm. The inclination direction of the inclined protrusions 210 determines the direction of the thread on the final roller surface. By setting the height, width, and spacing of the inclined protrusions within the above ranges, grooves of corresponding depth and width can be formed on the surface of the blank, ensuring the dimensional accuracy and forming quality of the thread structure.

[0033] See Figure 2 Furthermore, in this embodiment, the driving assembly 400 includes: a power unit 410 disposed at the second end of the barrel 100; and an extrusion pusher 420 disposed inside the barrel 100, wherein the extrusion pusher 420 is connected to the power output end of the power unit 410. The ceramic raw material is pushed forward by the extrusion pusher 420 driven by the power unit 410, resulting in a simple structure and reliable transmission.

[0034] Preferably, the power unit 410 is a variable frequency motor, and the speed is adjusted by a frequency converter to control the extrusion speed. The extrusion pusher 420 is a screw, which is driven by the power unit 410 to rotate. The screw's helical blades generate shear force to push the ceramic raw material forward. The screw pitch and speed can be adjusted according to the characteristics of the raw material and the product specifications. Alternatively, the extrusion pusher 420 is a piston, which is driven by the power unit 410 to reciprocate hydraulically or pneumatically, extruding the ceramic raw material in the barrel 100 forward. When a variable frequency motor is used as the power unit 410, the speed can be flexibly adjusted to meet the production needs of different product specifications, making operation convenient and applicable to a wide range of applications. When a screw or piston is used as the extrusion pusher 420, the optimal extrusion method can be flexibly selected according to the characteristics of the raw material and the production scale, improving the process adaptability of the equipment.

[0035] See Figure 4 , Figure 4 This is a schematic diagram of the structure of the core of a ceramic roller forming device according to an embodiment of this application; Furthermore, in this embodiment, the core disk 310 of the core mechanism 300 is provided with a feed hole 311 around its circumference. The ceramic raw material in the barrel 100 flows into the gap between the core mechanism 300 and the molding die 200 through the feed hole 311. By providing a feed hole 311 around the core disk 310, the ceramic raw material flows evenly into the molding cavity between the core mechanism 300 and the molding die 200 through the feed hole 311, ensuring that the raw material is evenly distributed circumferentially in the molding cavity. This avoids uneven material supply leading to inconsistent local density of the blank or incomplete thread shape, thereby effectively ensuring the uniformity of the product wall thickness and the integrity of the thread structure, and improving the molding quality.

[0036] Furthermore, in this embodiment, the lifting component 600 is a lifting machine, which is connected to the outer wall of the machine barrel 100 and is used to lift the machine barrel 100 to a certain tilt angle relative to the horizontal ground. The lifting machine can easily lift the machine barrel 100 to the required tilt angle, is convenient to operate, and allows for flexible angle adjustment. The optimal tilt angle can be adjusted in real time according to different product specifications and raw material characteristics, improving the equipment's adjustability and adaptability.

[0037] Furthermore, in this embodiment, the support core 500 is a hollow tube, and its outer surface is coated with a lubricating substance. One end of the support core 500 abuts against the end of the mandrel 320 away from the mandrel 310, and the other end extends naturally along the inclined direction of the barrel 100. The support core 500 adopts a hollow tube structure, which is lightweight and easy to handle and replace; after the outer surface is coated with a lubricating substance, the core can be easily pulled out and separated from the blank after molding, realizing rapid and non-destructive demolding, effectively avoiding damage to the blank during demolding, and improving the yield; after each blank is completed, a new support core 500 is replaced, and the production of the next blank can begin immediately, realizing continuous production and greatly improving production efficiency.

[0038] See Figure 1 Furthermore, in this embodiment, the molding equipment also includes a cutting component 910, which is disposed on the outer wall of the first end of the barrel 100 and is used to cut the blank after extruding a blank of a predetermined length. The cutting component 910 can automatically cut the blank after extruding a blank of a predetermined length, realizing the automation of fixed-length cutting, ensuring the consistency of the length of each blank, avoiding dimensional deviations caused by manual cutting, and improving production efficiency and product dimensional accuracy.

[0039] Specifically, the cutting assembly 910 can be a hydraulic cutter or an automatic cutting device. The cutting action of the cutting assembly 910 is controlled by the controller 700. When the extrusion length reaches a predetermined value, the controller 700 sends a cutting signal, the cutting assembly 910 starts and cuts the billet.

[0040] See Figure 1 Furthermore, in this embodiment, the molding equipment also includes a temperature control component, which includes: a cooling element 921 disposed on the barrel 100 for cooling the barrel 100 and the molding die 200; and a temperature sensor 922 disposed on the barrel 100 and / or the molding die 200 for monitoring the temperature. Before the ceramic clay enters the molding die 200, the cooling element 921 first cools the barrel 100 to control the temperature of the clay inside the barrel 100 within the required process range. The pre-cooling of the barrel 100 by the cooling component 921 effectively counteracts the shear heat generated by shear friction in the ceramic clay within the barrel 100, preventing the organic binder in the clay from thermally decomposing due to overheating and ensuring the molding performance of the clay. Precise temperature control of the barrel 100 avoids abnormal flowability or localized scorching of the clay due to excessive temperature, thus preventing defects such as bubbles, streaks, and uneven dimensions in the extruded products, ensuring the dimensional accuracy and surface quality of the products. Simultaneously, it ensures a smooth temperature transition of the clay before it enters the molding die 200, reducing internal stress caused by temperature differences, effectively preventing product warping or cracking, and improving product molding quality and equipment operational stability.

[0041] Specifically, the cooling component 921 is preferably a water-cooled jacket or an air-cooled device. The water-cooled jacket is arranged around the outer wall of the barrel 100, and cooling water is circulated inside for cooling. The air-cooled device blows cold air to the barrel 100 and the forming mold 200 through a fan. The temperature sensor 922 is preferably a thermocouple or a resistance temperature detector (RTD), with its measuring end embedded in the wall of the barrel 100 or the mold wall, and its signal output end electrically connected to the controller 700.

[0042] Furthermore, in this embodiment, the molding equipment also includes a vacuum pump 930, which is connected to the interior of the barrel 100 and is used to expel gases from the ceramic raw materials. The vacuum pump 930 creates a negative pressure environment inside the barrel 100, effectively expelling air and moisture from the ceramic raw materials, significantly reducing porosity defects inside the green body, and improving the density, uniformity, and strength of the product, thereby enhancing the density and mechanical properties of the final product.

[0043] Furthermore, this embodiment provides a method for forming a ceramic helical toothed roller, implemented using the aforementioned ceramic roller forming equipment, including the following steps: S1: Cooling component 921 pre-cools barrel 100, and temperature sensor 922 monitors the temperature of barrel 100 in real time and feeds the signal back to controller 700 so that the temperature of barrel 100 reaches the preset process requirements.

[0044] S2: The ceramic raw material is fed into the barrel 100 through the feed port 110 on the barrel 100.

[0045] Specifically, the ceramic raw material can be powder or plastic clay. The ceramic raw material can be selected from materials such as alumina and silicon nitride, depending on the actual application requirements.

[0046] S3: Start the vacuum pump 930 to create a vacuum inside the barrel 100, thereby creating a negative pressure environment inside the barrel 100 to expel air and moisture from the ceramic raw materials, thereby reducing porosity defects inside the green body and improving the density and uniformity of the green body.

[0047] S4: The lifting assembly 600 lifts the barrel 100, making the barrel 100 tilt at a certain angle relative to the horizontal ground.

[0048] S5: Start the drive assembly 400. The power unit 410 drives the extrusion pusher 420 to move, extruding the ceramic raw material in the barrel 100 towards the core 300. The ceramic raw material flows evenly into the gap between the core 300 and the forming mold 200 through the feed hole circumferentially provided on the core disk 310 of the core 300, and then is continuously extruded from the outlet of the forming mold 200.

[0049] Specifically, because the inner wall of the forming cavity of the forming mold 200 is provided with inclined protrusions 210, the billet is driven to rotate by the inclined protrusions 210 while moving forward in a straight line, thereby directly forming an inclined groove 830 structure on the surface of the billet. The inner surface of the extruded billet is fitted onto the outer surface of the support core 500. Because the equipment is in an inclined state, the billet rotates smoothly along the inclined axis 320 of the support core 500 under its own gravity, effectively ensuring the straightness and roundness of the billet.

[0050] S6: When the extrusion reaches the predetermined length, the controller 700 sends a cutting signal, the cutting component 910 starts, cuts the blank, and completes the production of a single ceramic helical toothed roller blank 810.

[0051] S7: Remove the support core 500 containing the blank.

[0052] Because the support core 500 is a hollow tube and its outer surface is coated with a lubricating substance, it can be easily removed from the blank, achieving rapid and non-destructive demolding. A new support core 500 is then placed at the exit of the forming mold 200 to prepare for the production of the next blank. One end of the support core 500 abuts against the end of the mandrel 320 furthest from the mandrel disk 310, ensuring the stability of the support core 500's position during operation.

[0053] S8: The demolded ceramic helical tooth roller blank 810 is subjected to post-treatment such as drying and sintering to obtain the finished ceramic helical tooth roller.

[0054] Furthermore, in this embodiment, the order of steps S2 and S3 can be adjusted according to actual process needs. They can be performed simultaneously, or one or two steps can be selectively executed based on the characteristics of the raw materials. Step S4 can be completed before extrusion molding. The tilt angle can be flexibly adjusted according to different product specifications and raw material characteristics to optimize the molding quality of the preform.

[0055] See Figure 5 , Figure 5 This is a schematic diagram of the structure of a ceramic helical toothed roller according to an embodiment of this application. As shown in the figure, the ceramic helical toothed roller is manufactured using the aforementioned ceramic roller forming equipment. The ceramic helical toothed roller includes a roller body 820 and multiple inclined grooves 830 formed on the outer surface of the roller body 820. The inclined grooves 830 are inclined relative to the axial direction of the roller body 820, and the multiple inclined grooves 830 are arranged at intervals along the axial direction of the roller body 820, forming a spiral pattern on the outer surface of the roller body 820. This ceramic helical toothed roller is directly extruded using the equipment of this application. The spiral pattern structure is formed in one step during the blank stage, eliminating the need for secondary machining. This fundamentally avoids the risk of micro-cracks on the roller surface caused by secondary machining, eliminates stress concentration sources, and makes the roller less prone to breakage in the high-temperature kiln environment, significantly extending its service life.

[0056] Furthermore, in this embodiment, the inclination angle of the inclined groove 830 relative to the axial direction of the roller body 820 is 10°~30°, preferably 15°. Within this angle range, the inclined groove 830 neither approaches an axial straight groove, thus limiting the increase in heat dissipation area, nor approaches an annular groove, thus hindering air flow along the groove direction. This ensures a clear and regular thread structure while effectively balancing heat dissipation, friction enhancement, and molding processability. An angle of 15° yields the best results, achieving the optimal balance between increasing heat dissipation area, improving thermal stress distribution, and ensuring the structural strength of the roller.

[0057] See Figure 6 and Figure 7 , Figure 6 This is a schematic diagram of the structure of a left-handed ceramic helical toothed roller in an embodiment of this application; Figure 7 This is a schematic diagram of the structure of a right-handed ceramic helical toothed roller bar in an embodiment of this application; Furthermore, in this embodiment, the spiral thread is formed by a plurality of inclined grooves 830 spaced apart, and the plurality of inclined grooves 830 form left-hand or right-hand threads on the outer surface of the roller body 820. By forming left-hand or right-hand threads on the outer surface of the roller body 820 with a plurality of inclined grooves 830, the roller can be adapted to transmission systems with different rotation directions. In equipment such as roller kilns, the transmission systems of different kilns rotate in different directions. Left-hand threaded rollers and right-hand threaded rollers can be adapted to clockwise or counterclockwise rotating transmission shafts, respectively, to ensure that the roller and the transmission system operate synchronously and avoid loosening, jamming, or reduced transmission efficiency due to mismatch in thread direction. At the same time, in the scenario of conveying complex shaped billets, the thread direction can be flexibly selected according to the placement direction and movement trajectory of the billet, so that the billet moves more stably with the roller.

[0058] See Figure 8 , Figure 8 This is a side view of a ceramic helical toothed roller bar according to an embodiment of this application; Furthermore, in this embodiment, the cross-section of the inclined groove 830 is fan-shaped, and the width of the side of the cross-section closer to the center of the roller body 820 is smaller than the width of the side farther from the center of the roller body 820. The bottom of the inclined groove 830 is curved. The arc-shaped bottom of the fan-shaped cross-section eliminates the stress concentration points at sharp corners, allowing thermal and mechanical stresses to be evenly distributed along the arc surface, effectively avoiding stress peaks and significantly improving the roller's resistance to fracture under high-temperature loads. The arc-shaped curved bottom facilitates the sliding and discharge of impurities such as glaze and dust along the arc surface, preventing accumulation in dead corners and exhibiting excellent self-cleaning properties. Under the same groove depth, the surface area of ​​the fan-shaped cross-section is larger than that of the trapezoidal cross-section, further increasing the heat dissipation area and improving heat dissipation efficiency.

[0059] In other embodiments, the inclined groove 830 has a trapezoidal cross-section, with the width of the side of the trapezoid closer to the center of the roller body 820 being smaller than the width of the side farther from the center of the roller body 820, and the bottom of the inclined groove 830 is flat. The flat groove bottom is relatively easy to process, which helps reduce mold manufacturing costs and is suitable for mass production; the trapezoidal groove structure, while ensuring the groove volume, also provides the groove wall with a reasonable inclination angle, facilitating cleaning and maintenance.

[0060] In other embodiments, the cross-sectional shape of the inclined groove 830 can also be V-shaped or U-shaped. The V-shaped cross-section has better self-cleaning ability, and impurities are not easy to accumulate at the bottom of the groove; the U-shaped cross-section has a larger groove volume, which can accommodate more glaze or impurities.

[0061] Specifically, the depth of the inclined groove 830 is 1mm~5mm, the width is 2mm~8mm, and the spacing between adjacent inclined grooves 830 is 5mm~20mm. These preferred dimensional parameters ensure sufficient structural strength of the roller while guaranteeing heat dissipation, friction enhancement, and anti-sticking performance.

[0062] Specifically, the plurality of inclined grooves 830 are arranged at equal intervals along the axial direction of the roller body 820. This ensures that the spiral pattern on the roller surface is evenly distributed, guaranteeing uniform contact force between the roller and the blank during rotation. It avoids excessive or insufficient local force due to uneven pattern distribution, thereby ensuring smooth and consistent transmission and improving the stability of product quality.

[0063] Specifically, the inclined groove 830 and the roller body 820 are integrally formed. This allows the inclined groove 830 to be formed directly during the forming process of the roller body 820, eliminating the need for secondary machining. This fundamentally avoids the risk of micro-cracks on the roller surface caused by secondary machining in existing technologies, eliminates stress concentration sources, and makes the roller less prone to breakage in high-temperature kiln environments, significantly extending the service life of the roller.

[0064] Specifically, the main body 820 of the roller is made of alumina or silicon nitride. This gives the roller excellent high-temperature resistance, thermal shock resistance, and bending strength. Alumina and silicon nitride are well-known high-performance materials in the field of ceramic rollers, exhibiting stable physical and chemical properties in high-temperature kiln environments. Combined with the heat dissipation structure of the inclined groove 830, the thermal stability and service life of the roller under high-temperature conditions can be further improved.

[0065] See Figure 5 Furthermore, in this embodiment, the two ends of the inclined groove 830 extend to the two ends of the roller body 820, and the inclined groove 830 forms openings at the end faces of the two ends of the roller body 820. The inclined groove 830 penetrates the entire length of the roller body 820. This structure allows air to enter the inclined groove 830 from one end of the roller and flow out from the other end, forming a through-flow air circulation path. This further improves the airflow efficiency within the inclined groove 830, helps dissipate heat from both ends of the roller, avoids heat accumulation within the groove, and further enhances the overall heat dissipation efficiency and thermal stability.

[0066] As can be seen from the above, the ceramic roller forming equipment of the present invention, by setting inclined protrusions on the inner wall of the forming cavity of the forming mold, enables the green body to directly form an inclined groove structure during the extrusion process, fundamentally avoiding the risk of micro-cracks caused by secondary machining, significantly extending the service life of the roller, and simplifying the production process and reducing manufacturing costs; by using the lifting component to tilt the barrel relative to the horizontal ground, the extruded green body moves smoothly along the inclined support tube under its own gravity, effectively ensuring the straightness and roundness of the green body, overcoming the defect of bending and deformation of the green body caused by uneven gravity distribution in horizontal extrusion equipment, and greatly improving the dimensional accuracy and forming quality of the product.

[0067] This invention discloses a ceramic helical toothed roller. The helical grooves on the roller surface increase the heat dissipation area, improve air circulation and heat dissipation, and make the thermal stress distribution of the roller more uniform under high-temperature environments. This effectively reduces local overheating, lowers the risk of roller deformation or damage caused by thermal stress, and improves thermal stability. At the same time, the helical grooves increase the friction between the roller and the blank, improving transmission stability. The gaps can also accommodate a small amount of glaze and impurities, reducing the risk of adhesion and facilitating cleaning and maintenance. The threaded structure also enhances the moment of inertia of the roller section to a certain extent, improving bending strength and load-bearing capacity, enabling it to withstand heavier blanks or heavier loads. By adjusting the thread parameters, it can also adapt to blanks or loads of different specifications and shapes, thus broadening its applicability. In summary, the ceramic helical toothed roller of this invention achieves significant improvements in heat dissipation performance, thermal stability, transmission stability, anti-adhesion properties, bending strength, and application flexibility.

[0068] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A ceramic roller forming device, characterized in that, include: A barrel for holding ceramic raw materials, the barrel being provided with a feed inlet; A forming mold is installed at the first end of the barrel. The forming mold has a forming cavity that matches the outer contour of the ceramic roller. The inner wall of the forming cavity is provided with inclined protrusions. The inclined protrusions are used to form inclined grooves on the surface of the extruded ceramic roller blank. The mechanism is disposed inside the barrel, and the mechanism includes a core plate and a mandrel. The core plate abuts against the side of the molding die near the barrel, and the mandrel extends into the molding cavity. A drive assembly, fixed to the second end of the barrel, is used to squeeze the ceramic raw material inside the barrel toward one side of the core, so that the ceramic raw material flows through the gap between the core and the forming mold and is continuously extruded from the outlet of the forming mold to form a ceramic roller blank with a threaded structure on the surface. The support core abuts against the side of the mandrel away from the mandrel, and is used to receive the extruded preform; A lifting assembly, connected to the barrel, is used to tilt the barrel at a certain angle relative to the horizontal ground.

2. The ceramic roller forming equipment according to claim 1, characterized in that, The inner wall of the molding die is provided with a plurality of inclined protrusions, which are inclined relative to the axial direction of the molding die. The plurality of inclined protrusions are arranged at intervals along the axial direction of the molding die, forming a spiral pattern on the inner wall of the molding die. The inclination angle of the inclined protrusions relative to the axial direction of the molding die is 1° to 89°.

3. The ceramic roller forming equipment according to claim 1, characterized in that, The driving component includes: A power unit is located at the second end of the barrel; An extrusion pusher is disposed inside the barrel and is connected to the power output end of the power machine.

4. The ceramic roller forming equipment according to claim 1, characterized in that, The core plate of the mechanism is provided with a feeding hole, and the ceramic raw material in the barrel flows into the gap between the mechanism and the molding die through the feeding hole.

5. The ceramic roller forming equipment according to claim 1, characterized in that, The lifting assembly is a lifting machine, which is connected to the outer wall of the machine cylinder and is used to lift the machine cylinder so that it is inclined at a certain angle relative to the horizontal ground.

6. The ceramic roller forming equipment according to claim 1, characterized in that, The supporting core is a hollow tube, and the outer surface of the supporting core is coated with a lubricating substance.

7. The ceramic roller forming equipment according to claim 1, characterized in that, The forming equipment also includes a cutting assembly disposed on the outer wall of the first end of the barrel, which is used to cut the blank after extruding a blank of a predetermined length.

8. The ceramic roller forming equipment according to claim 1, characterized in that, The molding equipment further includes a temperature control component, which comprises: A cooling component is disposed on the barrel for cooling the barrel and the forming mold; A temperature sensor is installed on the barrel and / or the molding die to monitor the temperature.

9. The ceramic roller forming equipment according to claim 1, characterized in that, The molding equipment also includes a vacuum pump, which is connected to the inside of the barrel and is used to remove gas from the ceramic raw material.

10. A ceramic helical toothed roller bar, characterized in that, The ceramic helical toothed roller is manufactured using the ceramic roller forming equipment as described in any one of claims 1 to 9. The ceramic helical toothed roller includes a roller body and a plurality of inclined grooves formed on the outer surface of the roller body. The inclined grooves are inclined relative to the axial direction of the roller body, and the plurality of inclined grooves are arranged at intervals along the axial direction of the roller body, so that the outer surface of the roller body forms a spiral pattern.

11. The ceramic helical toothed roller bar according to claim 10, characterized in that, The inclination angle of the inclined groove relative to the axis of the main body of the roller is 1°~89°.

12. The ceramic helical toothed roller bar according to claim 10, characterized in that, The spiral pattern is formed by a plurality of oblique grooves spaced apart, and the plurality of oblique grooves form a left-hand thread or a right-hand thread on the outer surface of the roller body.

13. The ceramic helical toothed roller bar according to claim 10, characterized in that, The cross-sectional shape of the inclined groove is V-shaped, U-shaped, or trapezoidal.

14. The ceramic helical toothed roller bar according to claim 10, characterized in that, The cross-section of the inclined groove is trapezoidal or fan-shaped, and the width of the side of the cross-section closer to the center of the roller body is smaller than the width of the side farther from the center of the roller body. The bottom of the inclined groove is flat or curved.

15. The ceramic helical toothed roller bar according to claim 10, characterized in that, The depth of the inclined groove is 0.2mm to 5mm, the width is 1mm to 8mm, and the spacing between adjacent inclined grooves is 0.5mm to 20mm.

16. The ceramic helical toothed roller bar according to claim 10, characterized in that, The plurality of the inclined grooves are arranged at equal intervals along the axial direction of the main body of the roller.

17. The ceramic helical toothed roller bar according to claim 10, characterized in that, The two ends of the inclined groove extend to the two ends of the roller body, and the inclined groove forms openings at the end faces of the two ends of the roller body.

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