Conveying structure of large 3D printer

Abstract

The utility model provides a material conveying structure of a large-scale 3D printer, which comprises a material conveying pipe, and further comprises two platinum thermal resistance wires, a processor and a controller, the two platinum thermal resistance wires are respectively and uniformly wound on two ends of the material conveying pipe, the processor is connected with the two platinum thermal resistance wires, and the processor is used for detecting the temperature difference value of the two platinum thermal resistance wires. And when the processor detects that the temperature difference value exceeds a preset value, the processor sends a signal to the controller, and the controller stops working of the 3D printer. The platinum thermal resistance wires can generate different thermoelectromotive forces at different temperatures and can convert the thermoelectromotive forces into electric signals, then the electric signals are input into the processor to calculate the temperature difference value between the two platinum thermal resistance wires at the two ends of the conveying pipe, and when the temperature difference value at the two ends exceeds a preset value, the machine is stopped in time through the controller. The probability of pipe explosion accidents in the feeding speed adjusting process is reduced, and safety is improved.

Description

Technical Field

[0001] This utility model relates to the field of large-scale 3D printers, and in particular to a material feeding structure for a large-scale 3D printer. Background Technology

[0002] 3D printing, also known as additive manufacturing or rapid prototyping, is a type of digital material printer. It typically uses a digital material printer, called a 3D printer. Many large sculptures are now printed using large-scale 3D printers. A typical large-scale 3D printer includes a material hopper, a heating device, a robotic arm with nozzles, and a worktable. The heating device heats the material in the hopper to a molten state, then feeds the molten material through a feed pipe to the nozzles. The robotic arm, controlled by a program, moves the nozzles to spray the molten material onto the worktable, continuously stacking and building up to create the desired large 3D model.

[0003] Because large 3D printers have long feed tubes, the molten material dissipates heat when passing through the feed tube, causing the temperature of the molten material to drop during the process of being transported to the nozzle. This reduces the flowability of the molten material at the nozzle, making it easy to clog the feed tube and cause a tube burst. Therefore, the feeding speed needs to be adjusted before formal use, and tube bursts are very likely to occur during this process. Utility Model Content

[0004] To reduce the occurrence of tube bursts during the debugging of feeding speed, this application provides a feeding structure for a large 3D printer.

[0005] This application provides a technical solution using the following approach:

[0006] A feeding structure for a large 3D printer includes a feeding tube, characterized in that it further includes two platinum resistance thermometers, a processor, and a controller. The two platinum resistance thermometers are evenly wound around both ends of the feeding tube. The processor is connected to the two platinum resistance thermometers and is used to detect the temperature difference between the two platinum resistance thermometers. When the processor detects that the temperature difference exceeds a preset value, the processor sends a signal to the controller, and the controller stops the 3D printer from operating.

[0007] The above technical solution relies on the fact that platinum resistance wires generate different thermoelectric potentials at different temperatures, and can convert the thermoelectric potentials into electrical signals. These electrical signals are then input into the processor to calculate the temperature difference between the two platinum resistance wires at both ends of the feeding tube. When the temperature difference between the two ends exceeds the preset value, the controller will stop the machine in time, reducing the probability of tube bursting accidents during the adjustment of the feeding speed and increasing safety.

[0008] Preferably, the device also includes two display panels, each connected to one of two platinum resistance wires, which are used to display real-time temperature.

[0009] Through the above technical solution, the display panel can intuitively show the operator the real-time temperature at both ends of the feed pipe during the working process, which facilitates timely manual intervention by the operator when the controller fails and cannot stop the machine on its own.

[0010] Preferably, it also includes a stainless steel mesh, which is sleeved on the outside of the conveying pipe.

[0011] Through the above technical solution, stainless steel mesh is used to enhance the overall structural strength of the conveying pipe, which can resist the internal impact force when the pipe bursts, and effectively reduce the impact of the pipe burst on the equipment.

[0012] Preferably, it also includes an anti-slip layer, which is sleeved on the outside of the stainless steel mesh, and the platinum resistance wire is wound around the outside of the anti-slip layer. The anti-slip layer is made of high-temperature resistant fabric.

[0013] With the above technical solution, since the robotic arm moves back and forth, it drives the feeding tube to move as well. The platinum resistance wire will inevitably slide on the feeding tube when it moves, causing two adjacent platinum resistance wires to stick together, affecting the accuracy of temperature detection. The purpose of the anti-slip layer design is to reduce this situation.

[0014] Preferably, it also includes a heat insulation layer, which is wrapped around the outside of the platinum resistance wire with high-temperature tape, and the heat insulation layer is made of metaaluminate ceramic fiber.

[0015] Through the above technical solution, the alumina ceramic fiber insulation layer has excellent thermal insulation performance, which can maintain the overall temperature of the conveying pipe relatively stable during the operation process and reduce the influence of the external ambient temperature on the temperature of the molten material during the conveying process.

[0016] Preferably, it also includes a nylon mesh, which is sleeved on the outside of the insulation layer.

[0017] The nylon mesh design, as described above, is intended to prevent molten material from splashing everywhere during a pipe burst, thus avoiding equipment damage or personal injury.

[0018] Preferably, the feed pipe is further provided with binding cylinders at both ends, the binding cylinders are sleeved on the outside of the nylon mesh, and the binding cylinders are also provided with clamping rings, which are used to tighten the binding cylinders.

[0019] The above technical solution effectively fixes all the above structures with the tie tube and the clamp ring. At the same time, the operator can easily install or remove the tie tube by simply adjusting the clamp ring, which improves the convenience of operation.

[0020] The main technical effects of this utility model are reflected in the following aspects:

[0021] 1. This utility model uses a platinum resistance thermometer to monitor the temperature at both ends of the feeding pipe in real time during operation, and stops the machine promptly when the temperature difference between the two ends exceeds a preset value, reducing the probability of pipe bursting accidents during the adjustment of the feeding speed and increasing safety;

[0022] 2. This utility model displays the real-time temperature via a display panel, facilitating timely manual intervention by operators in cases where the controller malfunctions and cannot automatically stop the machine.

[0023] 3. This utility model enhances pipe strength, improves insulation, and reduces damage after a pipe burst by designing a multi-layer structure. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0025] Figure 2 This is a schematic diagram of the structure of the platinum resistance wire wound on the feed pipe in an embodiment of this application;

[0026] Figure 3 This is a cross-sectional schematic diagram of an embodiment of this application;

[0027] Figure 4 Examples of embodiments in this application Figure 2 Enlarged schematic diagram of the cross-section at point A.

[0028] Attached reference numerals: 1. Feed pipe; 2. Platinum resistance wire; 3. Processor; 4. Display panel; 5. Stainless steel mesh; 6. Anti-slip layer; 7. High-temperature tape; 8. Insulation layer; 9. Nylon mesh; 10. Binding tube; 11. Hoop ring. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-4 The specific embodiments of this utility model will be further described in detail to make the technical solution of this utility model easier to understand and master.

[0030] This application discloses a feeding structure for a large-scale 3D printer:

[0031] Reference Figure 1-4A feeding structure for a large 3D printer includes a feeding tube 1, two platinum resistance thermometers 2, a processor 3, and a controller. The two platinum resistance thermometers 2 are evenly wound around both ends of the feeding tube 1. The platinum resistance thermometers 2 are commonly found embedded platinum resistance thermometers, existing technology, and will not be described in detail here. The processor 3 is connected to the two platinum resistance thermometers 2 and is used to detect the temperature difference between them. When the processor 3 detects a temperature difference exceeding a preset value, it sends a signal to the controller, which then stops the 3D printer. The printer utilizes the different thermoelectric potentials generated by the platinum resistance thermometers 2 at different temperatures, converting these potentials into electrical signals. These signals are then input into the processor 3 to calculate the temperature difference between the two platinum resistance thermometers 2 at both ends of the feeding tube 1. When the temperature difference exceeds the preset value, the controller promptly stops the printer, reducing the probability of tube bursts during feeding speed adjustments and increasing safety.

[0032] Reference Figure 1 It also includes two display panels 4, each connected to one of the two platinum resistance heating wires 2. Each display panel 4 contains a chip that converts temperature data into a specific value, allowing the operator to visually monitor the real-time temperature at both ends of the feed tube 1 during operation. This facilitates timely manual intervention in case the controller malfunctions and cannot automatically stop the machine. The display panels 4 should be placed away from the 3D printer's working area and close to the feed tube 1 to control the length of the exposed platinum resistance heating wires 2, reducing the likelihood of them kinking or coiling during operation. Ideally, they should also be placed near the processor 3 for easy management and repair.

[0033] Reference Figure 3 It also includes a stainless steel mesh 5, which is fitted onto the outside of the conveying pipe 1. The stainless steel mesh 5 is used to enhance the overall structural strength of the conveying pipe 1, resisting the internal impact force in the event of a pipe burst, and effectively reducing the impact of a pipe burst on the equipment.

[0034] Reference Figure 3 It also includes an anti-slip layer 6, which is fitted over the outside of the stainless steel mesh 5. The platinum resistance wire 2 is wound around the outside of the anti-slip layer 6, which is made of high-temperature resistant fabric. The high-temperature resistant fabric has a high coefficient of friction, and the platinum resistance wire 2 is fixed to the fabric by high-temperature tape 7. Because the robotic arm moves back and forth, it drives the feed tube 1 to move as well. Even with the high-temperature tape 7, the platinum resistance wire 2 will inevitably slide on the feed tube 1 during long-term use, causing adjacent platinum resistance wires 2 to stick together, affecting the accuracy of temperature detection. The anti-slip layer 6 is designed to reduce this situation.

[0035] Reference Figure 3It also includes a thermal insulation layer 8, which is wrapped around the outside of the platinum resistance wire 2 with high-temperature tape 7. The thermal insulation layer 8 is made of alumina ceramic fiber. The alumina ceramic fiber thermal insulation layer 8 has excellent thermal insulation performance, which can keep the overall temperature of the conveying pipe 1 relatively stable during operation and reduce the influence of the external ambient temperature on the temperature of the molten material during the conveying process.

[0036] Reference Figure 1 and Figure 3 It also includes a nylon mesh 9, which is fitted onto the outside of the insulation layer 8. The mesh diameter of the nylon mesh 9 is approximately 1-2mm, which can effectively intercept molten material ejected under pressure in the event of a pipe burst, thus preventing equipment damage or personal injury.

[0037] Reference Figure 1 The feed pipe 1 is also fitted with binding cylinders 10 at both ends. The binding cylinders 10 are fitted onto the outside of the nylon mesh 9. The binding cylinders 10 are also fitted with clamping rings 11, which are used to tighten the binding cylinders 10. The binding cylinders 10 and clamping rings 11 can effectively fix all the above structures. At the same time, the operator can easily install or remove the binding cylinders 10 by adjusting the clamping rings 11, which improves the convenience of operation.

[0038] Of course, the above are just typical examples of this utility model. In addition, this utility model may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by this utility model.

Claims

1. A material conveying structure of a large 3D printer, comprising a material conveying pipe (1), characterized in that, Two platinum resistance wires (2), a processor (3) and a controller are further included, the two platinum resistance wires (2) are evenly wound on two ends of the material conveying pipe (1) respectively, the processor (3) is connected with the two platinum resistance wires (2), and the processor (3) is used for detecting a temperature difference of the two platinum resistance wires (2); when the processor (3) detects that the temperature difference exceeds a preset value, the processor (3) sends a signal to the controller, and the controller stops the work of the 3D printer.

2. The feeding structure of a large 3D printer according to claim 1, wherein, Two display panels (4) are further included, the two display panels (4) are connected with the two platinum resistance wires (2) respectively, and the display panel (4) is used for displaying a real-time temperature.

3. The feeding structure of a large 3D printer according to claim 1, wherein, A stainless steel net (5) is further included, and the stainless steel net (5) is sleeved on the outside of the material conveying pipe (1).

4. The feeding structure of a large 3D printer according to claim 3, wherein, An anti-skid layer (6) is further included, the anti-skid layer (6) is sleeved on the outside of the stainless steel net (5), the platinum resistance wire (2) is wound on the outside of the anti-skid layer (6), and the anti-skid layer (6) is made of high-temperature-resistant cloth.

5. The feeding structure of a large 3D printer according to claim 1, wherein, A heat preservation layer (8) is further included, the heat preservation layer (8) is wound and wrapped on the outside of the platinum resistance wire (2) through a high-temperature adhesive tape (7), and the heat preservation layer (8) is made of aluminum ceramic fiber.

6. The feeding structure of a large 3D printer according to claim 5, wherein, A nylon net (9) is further included, and the nylon net (9) is sleeved on the outside of the heat preservation layer (8).

7. The feeding structure of a large 3D printer according to claim 1, wherein, Zapping barrels (10) are further arranged at two ends of the material conveying pipe (1), the zapping barrels (10) are sleeved on the outside of the nylon net (9), and hoop rings (11) are further arranged on the zapping barrels (10), and the hoop rings (11) are used for tightening the zapping barrels (10).

Images