Ceramic 3d printing extrusion device

Abstract

The utility model discloses a ceramic 3D printing extrusion forming device, including the forming mesa, stepping motor and material box, the utility model discloses a crosspiece is set up at the top of forming mesa, and the stepping motor and material box are set up at the top of crosspiece, and the extrusion cover is set up at the bottom of crosspiece, and the extrusion head is set up at the bottom of extrusion cover, and the discharge pipe is set up at the bottom of material box, and the discharge pipe is connected to extrusion cover, and the screw rod is set up in the inside of extrusion cover, and the screw rod is connected with stepping motor, and the extrusion operation is carried out through the motor drive screw rod rotation, compared with traditional extrusion forming equipment, simple structure, convenient to use.

Description

Technical Field

[0001] This utility model relates to the field of ceramic 3D printing technology, specifically to a ceramic 3D printing extrusion molding device. Background Technology

[0002] Ceramic materials, with their excellent high temperature resistance, corrosion resistance, high hardness, good biocompatibility, and unique electrical and optical properties, play an irreplaceable and important role in many fields such as aerospace, energy and environmental protection, biomedicine, electronic devices, and art design.

[0003] In existing ceramic 3D printing technology, the forming device has many shortcomings: 1. Some devices have complex structures. For example, indirect forming requires the addition of heating and temperature measuring devices to the extrusion nozzle, which makes the structure cumbersome and easy to damage; 2. Existing extrusion equipment requires waiting for the ceramic preform to dry naturally after extrusion forming. The drying speed is slow and affects the printing speed. Utility Model Content

[0004] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be used to limit the scope of this utility model.

[0005] In view of the problems existing in the above and / or existing ceramic 3D printing extrusion molding apparatus, this utility model is proposed.

[0006] Therefore, the purpose of this utility model is to provide a ceramic 3D printing extrusion molding device. By setting a horizontal plate on the top of the molding table, a stepper motor and a material box on the top of the horizontal plate, an extrusion sleeve at the bottom of the horizontal plate, an extrusion head at the bottom of the extrusion sleeve, a discharge pipe at the bottom of the material box, and the discharge pipe connected to the extrusion sleeve, a screw is set inside the extrusion sleeve, and the screw is connected to the stepper motor. The motor drives the screw to rotate to perform the extrusion operation. Compared with traditional extrusion molding equipment, it has a simple structure and is easy to use.

[0007] To solve the above-mentioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution:

[0008] A ceramic 3D printing extrusion molding apparatus, comprising:

[0009] A forming table surface, wherein an extension table is installed on the side wall of the forming table surface, a vertical plate is installed on the top of the extension table, a horizontal plate is installed at the top of the vertical plate, the vertical plate and the horizontal plate are perpendicularly arranged, the horizontal plate is parallel to the top of the forming table surface, and the other end of the horizontal plate extends to the position above the forming table surface.

[0010] A stepper motor is installed on the top of the horizontal plate and above the forming table. A mounting platform is installed on the top of the horizontal plate. The bottom of the mounting platform is mounted on the top of the horizontal plate via a support column. A coupling is provided inside the mounting platform. The stepper motor is installed on the top of the mounting platform and is coaxial with the coupling. The output end of the stepper motor extends into the interior of the mounting platform and is connected to the coupling. A feeding screw is rotatably connected to the bottom of the horizontal plate. The feeding screw is coaxially and fixedly connected to the coupling.

[0011] A material box is installed on the top of the horizontal plate, and an extrusion sleeve is installed at the bottom of the horizontal plate. The feeding screw extends into the interior of the extrusion sleeve. A discharge pipe is installed at the bottom of the material box, and the other end of the discharge pipe is connected to the extrusion sleeve. An extrusion head is installed at the bottom of the extrusion sleeve.

[0012] In a preferred embodiment of the ceramic 3D printing extrusion molding device described in this utility model, the extrusion head is a screw valve, the screw of the screw valve is a variable pitch screw, the initial pitch is -mm, and the outlet pitch is -mm.

[0013] In a preferred embodiment of the ceramic 3D printing extrusion molding device of this utility model, the outer wall of the extrusion sleeve is provided with two bosses, which are respectively located at the top and bottom of the extrusion sleeve.

[0014] In a preferred embodiment of the ceramic 3D printing extrusion molding device of this utility model, an mounting plate is installed on the side wall of the molding table, a motor is installed on the side wall of the mounting plate, a first pulley is installed at the output end of the motor, the other side wall of the first pulley is rotatably connected to the side wall of the molding table, two slots are symmetrically opened on the top of the molding table, threaded rods are rotatably connected inside the slots, and two second pulleys are symmetrically rotatably connected to the side wall of the molding table, the two second pulleys are coaxially fixedly connected to the two threaded rods respectively, and both second pulleys are connected to the first pulley by a belt.

[0015] As a preferred embodiment of the ceramic 3D printing extrusion molding device of this utility model, it further includes an infrared heater, a movable plate is provided at the bottom of the infrared heater, the infrared heater and the movable plate are connected by a connecting plate, there are multiple infrared heaters and they are symmetrically located on the top of the molding table, a slider is installed at the bottom of the movable plate, the slider is located inside the slot, the side wall of the slider is provided with a threaded hole, and the threaded rod rotates through the threaded hole.

[0016] In a preferred embodiment of the ceramic 3D printing extrusion molding device of this utility model, a guide groove is provided on the inner wall of the slot, a guide plate is installed on the side wall of the slider, and the guide plate is located inside the guide groove.

[0017] Compared with existing technologies: By setting a horizontal plate on the top of the forming table, with a stepper motor and a material box at the top of the horizontal plate, an extrusion sleeve at the bottom of the horizontal plate, an extrusion head at the bottom of the extrusion sleeve, a discharge pipe at the bottom of the material box, and the discharge pipe connected to the extrusion sleeve, and a screw inside the extrusion sleeve connected to the stepper motor, the extrusion operation is performed by the motor driving the screw to rotate. Compared with traditional extrusion molding equipment, this method has a simple structure and is easy to use. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0019] Figure 1 This is an overall structural diagram of a ceramic 3D printing extrusion molding device according to the present invention;

[0020] Figure 2 This is a partial structural diagram of a ceramic 3D printing extrusion molding device according to the present invention;

[0021] Figure 3 This is a structural diagram of an infrared heater for a ceramic 3D printing extrusion molding device according to this utility model. Detailed Implementation

[0022] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0023] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views showing the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, in actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0025] This utility model provides a ceramic 3D printing extrusion molding device. It features a horizontal plate on the top of the molding table, a stepper motor and a material box on the top of the horizontal plate, an extrusion sleeve at the bottom of the horizontal plate, an extrusion head at the bottom of the extrusion sleeve, a discharge pipe at the bottom of the material box, and a screw inside the extrusion sleeve connected to the extrusion sleeve. The screw is connected to the stepper motor, and the motor drives the screw to rotate for extrusion. Compared with traditional extrusion molding equipment, this device has a simple structure and is easy to use.

[0026] Example 1

[0027] Regarding the aforementioned problem 1: some devices have complex structures, such as indirect molding which requires the addition of heating and temperature measuring devices to the extrusion nozzle, resulting in a cumbersome structure that is prone to damage.

[0028] The solution is as follows: A ceramic 3D printing extrusion molding device according to this embodiment includes a molding table 100, a stepper motor 200 and a material box 300.

[0029] An extension platform 110 is installed on the side wall of the molding table 100. A vertical plate 120 is installed on the top of the extension platform 110. A horizontal plate 130 is installed at the top of the vertical plate 120. The vertical plate 120 and the horizontal plate 130 are vertically arranged. The horizontal plate 130 is parallel to the top of the molding table 100. The other end of the horizontal plate 130 extends to a position above the molding table 100. A stepper motor 200 is installed on the top of the horizontal plate 130 and located above the molding table 100. An mounting platform 210 is installed on the top of the horizontal plate 130. The mounting platform 210 is mounted on top of the horizontal plate 130 via support columns. A coupling 220 is installed inside the mounting platform 210. A stepper motor 200 is mounted on top of the mounting platform 210 and is coaxial with the coupling 220. The output end of the stepper motor 200 extends into the mounting platform 210 and is connected to the coupling 220. A feeding screw 230 is rotatably connected to the bottom of the horizontal plate 130. The feeding screw 230 is coaxially and fixedly connected to the coupling 220. The material box 300 is installed... An extrusion sleeve 310 is installed at the top and bottom of the horizontal plate 130. A feeding screw 230 extends into the extrusion sleeve 310. A discharge pipe 320 is installed at the bottom of the material box 300, and the other end of the discharge pipe 320 is connected to the extrusion sleeve 310. An extrusion head 340 is installed at the bottom of the extrusion sleeve 310. In this application, the discharge pipe 320 and the extrusion sleeve 310 form an inverted "U" shape. The feeding screw 230 is controlled by a stepper motor 200 through a coupling 220. The screw 230 and coupling 220 are sealed by a skeleton oil seal. The screw 230 is made of polytetrafluoroethylene. When the stepper motor 200 rotates clockwise, it drives the coupling 220 to rotate clockwise. The coupling 220 drives the screw 230 to rotate, controlling the extrusion section to extrude the ceramic material from the bottom of the extrusion sleeve 310. When it rotates counterclockwise, it drives the coupling 220 to rotate counterclockwise, controlling the extrusion section to stop extrusion. In addition, the stepper motor 200 uses a two-position three-way solenoid valve to control the conveying and stopping of the ceramic material.

[0030] The extruder head 340 is a screw valve with a variable pitch screw. The initial pitch is 15-30mm, and the outlet pitch is 5-10mm. The outer wall of the extrusion sleeve 310 is provided with two bosses 330, located at the top and bottom of the extrusion sleeve 310 respectively. This application uses a two-position three-way solenoid valve and a screw valve to control the conveying and stopping of ceramic materials, which improves printing accuracy. The screw is made of polytetrafluoroethylene, which will not stick to the ceramic materials, has low frictional resistance, ensures smooth material flow, and prevents the formation of air bubbles.

[0031] Example 2

[0032] Regarding the second problem to be solved above: existing extrusion equipment requires waiting for the ceramic preform to dry naturally after extrusion molding, which is slow and affects the printing speed.

[0033] The solution is as follows: A ceramic 3D printing extrusion molding device in this embodiment also includes an infrared heater 400.

[0034] A mounting plate 140 is installed on the side wall of the forming table 100. A motor 150 is installed on the side wall of the mounting plate 140. A first pulley 151 is installed at the output end of the motor 150. The other side wall of the first pulley 151 is rotatably connected to the side wall of the forming table 100. Two slots 160 are symmetrically opened on the top of the forming table 100. A threaded rod 161 is rotatably connected inside the slot 160. Two second pulleys 162 are symmetrically rotatably connected to the side wall of the forming table 100. The two second pulleys 162 are coaxially fixedly connected to the two threaded rods 161 respectively. Both second pulleys 162 are connected to the first pulley 151 by belts. A movable plate 410 is provided at the bottom of the infrared heater 400. The infrared heater 400 and the movable plate 410 are connected by a connecting plate 420. There are multiple infrared heaters 400, which are symmetrically located on the top of the forming table 100. The part is equipped with a slider 430, which is located inside the slot 160. The slider 430 has a threaded hole 440 on its side wall, through which the threaded rod 161 rotates. The slot 160 has a guide groove 163 on its inner wall, and a guide plate 450 is installed on the side wall of the slider 430, located inside the guide groove 163. When the material is extruded and formed on the top of the forming table 100, the infrared heater 400 is activated to heat the material, which can accelerate the forming speed of the extruded material and increase the extrusion efficiency. At the same time, the motor 150 drives the first pulley 151 to rotate. The first pulley 151 drives the second pulley 162 and the threaded rod 161 to rotate via the belt. The lead screw structure pushes the slider 430 to move the moving plate 410 and the infrared heater 400 on the top of the forming table 100, and the position of the infrared heater 400 is adjusted to meet different drying requirements.

[0035] Furthermore, a description of the innovative aspects and substantial technical effects of this solution.

[0036] 1. Innovation Points

[0037] Simplified structural design: The supporting frame is formed by the forming table 100, vertical plate 120 and horizontal plate 130. The stepper motor 200 directly drives the feeding screw 230 through the coupling 220. The material box 300 is connected to the extrusion sleeve 310 through the discharge pipe 320. No additional heating or temperature measuring device is required, which solves the problem of the cumbersome structure of traditional equipment.

[0038] Variable pitch extruder head design: The 340 extruder head adopts a screw valve with a variable pitch screw structure (initial pitch 15-30mm, exit pitch 5-10mm) to improve extrusion accuracy.

[0039] Movable infrared heating component: The molding table 100 drives the threaded rod 161 through the motor 150 and belt pulley transmission structure, which in turn moves the infrared heater 400 to achieve rapid drying.

[0040] 2. Substantial technical effects

[0041] Simplified structure: Reduces the number of parts, lowers the probability of failure, and improves assembly efficiency.

[0042] Enhanced extrusion stability: The variable pitch screw gradually increases the extrusion pressure of ceramic materials, improving the uniformity of output.

[0043] Improved drying efficiency: The infrared heater 400 can dynamically adjust its position according to the printing area, shortening the curing time of the preform.

[0044] Specifically, a comparison of relevant test data and practical application data for this solution.

[0045] Number of parts (pieces) 42 28 33.3％ Mean Time Between Failures (MTBF) (h) 150 220 46.7％ Discharge uniformity (coefficient of variation %) 5.8 3.2 44.8％ Embryo drying time (min / layer) 8.5 5.2 38.8％

[0046] Data Description

[0047] Number of parts: The number of core functional components (excluding fasteners) is significantly reduced in this equipment because the heating module and complex transmission components are omitted.

[0048] Mean time between failures (MTBF): Continuous printing for 100 hours constitutes one cycle. The experiment was repeated 5 times and the average value was taken. Due to the simplified structure of this equipment, the number of failure points has been reduced.

[0049] Discharge uniformity: The coefficient of variation is calculated by measuring the extrusion amount of 100 consecutive times using the weighing method. The variable pitch screw makes the material extrusion more stable.

[0050] Preform drying time: For a 2mm thick ceramic layer, the time from extrusion to curing (hardness up to 80%) was measured. Infrared heating shortened the time required for natural drying.

[0051] Data Validity Statement

[0052] Experimental environment: temperature 25±2℃, humidity 50±5%, using the same ceramic slurry (particle size 50μm, solid content 60%).

[0053] Sample size: Each indicator was repeated 3 times, and the arithmetic mean was taken. The data fluctuation range was ≤5%, and the results were considered statistically significant.

[0054] Variable control: Only the equipment model was changed, while other printing parameters (extrusion speed 5mm / s, layer thickness 0.3mm) remained the same to ensure the validity of the comparison.

[0055] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A ceramic 3D printing extrusion molding device, characterized in that, include: A forming table (100) is provided, an extension table (110) is installed on the side wall of the forming table (100), a vertical plate (120) is installed on the top of the extension table (110), a horizontal plate (130) is installed at the top of the vertical plate (120), the vertical plate (120) and the horizontal plate (130) are arranged perpendicularly to each other, the horizontal plate (130) is parallel to the top of the forming table (100), and the other end of the horizontal plate (130) extends to the position above the forming table (100); A stepper motor (200) is installed on the top of the horizontal plate (130) and above the forming table (100). A mounting platform (210) is installed on the top of the horizontal plate (130). The bottom of the mounting platform (210) is installed on the top of the horizontal plate (130) through a support column. A coupling (220) is provided inside the mounting platform (210). The stepper motor (200) is installed on the top of the mounting platform (210) and is coaxial with the coupling (220). The output end of the stepper motor (200) extends into the mounting platform (210) and is connected to the coupling (220). A feeding screw (230) is rotatably connected to the bottom of the horizontal plate (130). The feeding screw (230) is coaxially and fixedly connected with the coupling (220). A material box (300) is installed on the top of the horizontal plate (130). An extrusion sleeve (310) is installed at the bottom of the horizontal plate (130). The feeding screw (230) extends into the extrusion sleeve (310). A discharge pipe (320) is installed at the bottom of the material box (300). The other end of the discharge pipe (320) is connected to the extrusion sleeve (310). An extrusion head (340) is installed at the bottom of the extrusion sleeve (310).

2. The ceramic 3D printing extrusion molding apparatus according to claim 1, characterized in that, The extrusion head (340) is a screw valve, and the screw of the screw valve is a variable pitch screw with an initial pitch of 15-30mm and an outlet pitch of 5-10mm.

3. The ceramic 3D printing extrusion molding apparatus according to claim 2, characterized in that, The outer wall of the extrusion sleeve (310) is provided with a boss (330), and there are two bosses (330) located at the top and bottom of the extrusion sleeve (310) respectively.

4. The ceramic 3D printing extrusion molding apparatus according to claim 3, characterized in that, A mounting plate (140) is installed on the side wall of the forming table (100), and a motor (150) is installed on the side wall of the mounting plate (140). A first pulley (151) is installed at the output end of the motor (150). The other side wall of the first pulley (151) is rotatably connected to the side wall of the forming table (100). Two slots (160) are symmetrically opened on the top of the forming table (100). A threaded rod (161) is rotatably connected inside the slot (160). Two second pulleys (162) are symmetrically rotatably connected to the side wall of the forming table (100). The two second pulleys (162) are coaxially fixedly connected to the two threaded rods (161) respectively. The two second pulleys (162) are connected to the first pulley (151) by a belt.

5. A ceramic 3D printing extrusion molding apparatus according to claim 4, characterized in that, It also includes an infrared heater (400), the bottom of which is provided with a movable plate (410). The infrared heater (400) and the movable plate (410) are connected by a connecting plate (420). There are multiple infrared heaters (400) symmetrically located on the top of the forming table (100). A slider (430) is installed on the bottom of the movable plate (410). The slider (430) is located inside the slot (160). The side wall of the slider (430) is provided with a threaded hole (440). The threaded rod (161) rotates through the threaded hole (440).

6. A ceramic 3D printing extrusion molding apparatus according to claim 5, characterized in that, The inner wall of the slot (160) is provided with a guide groove (163), and a guide plate (450) is installed on the side wall of the slider (430). The guide plate (450) is located inside the guide groove (163).

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