Particle 3D printer with cavity temperature

Abstract

The granular material 3D printer with the cavity temperature comprises a printer body, a fan is arranged on one side of the printer body, a cold and hot air system is arranged on the other opposite side of the printer body, a filtering air outlet is formed in the upper portion of the cold and hot air system, and a vacuum adsorption platform is arranged in a cavity of the printer body; a liftable bracket is arranged above the vacuum adsorption platform, an X shaft and a Y shaft are arranged on the bracket, a printer head is arranged on the X shaft and can reciprocate along the X shaft, and the four lead screws drive the bracket to vertically ascend and descend along an optical axis when rotating synchronously. When the granular material 3D printer with the cavity temperature is used, cold and hot air circulation can be adjusted according to the characteristics of granular materials, model cooling and cavity temperature guaranteeing are facilitated, in addition, the printing precision can be improved through stable lifting of the bracket, meanwhile, the heating efficiency of the cavity is further improved through arrangement of organ cloth, and the granular material 3D printer is suitable for application and popularization.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printers, and in particular to a granular material 3D printer with chamber temperature control. Background Art

[0002] As an important branch in the field of additive manufacturing, granular material 3D printers are gradually emerging in industries such as industry, construction, and art, relying on their unique working principles and material adaptability. The price of granular raw materials is only 30% of that of wire materials. In specific fields, the production efficiency can be increased by dozens or even hundreds of times compared to wire printers. It can process some high-hardness and high-brittle materials that are difficult to handle by traditional wire printers, such as glass fiber-reinforced nylon, plastic particles mixed with metals, ceramic-based materials, etc.

[0003] However, existing granular material 3D printers on the market have problems such as low melting stability materials like PLA, resulting in poor cooling effects of printed models and severe screw wear; in addition, they are unable to blow hot and cold air into the chamber according to the characteristics of granular materials; at the same time, the protection during printing of granular consumables is not in place, making it easy to absorb water and causing difficulties in removing the model, and the use effect is not ideal. Summary of the Invention

[0004] The purpose of the present invention is to solve the above problems by providing a granular material 3D printer with chamber temperature control that can adjust the hot and cold air circulation according to the characteristics of granular materials, which helps to cool the model and ensure the chamber temperature. In addition, the stable lifting of the carriage can improve the printing accuracy, and the setting of the bellows cloth is also beneficial to improving the heating efficiency of the chamber.

[0005] To achieve the above purpose, the technical solution of the present invention is: a granular material 3D printer with chamber temperature control, including a printer body. One side of the printer body is provided with a fan, and the opposite side is provided with a hot and cold air system. Above the hot and cold air system is provided a filtered air outlet. Inside the chamber of the printer body is provided a vacuum adsorption platform. Above the vacuum adsorption platform is provided a liftable carriage. The carriage is provided with an X-axis and a Y-axis. The X-axis is provided with a printer head, and the printer head can reciprocate along the X-axis. The X-axis can reciprocate on the Y-axis.

[0006] Preferably, two optical axes and four lead screws are further provided inside the printer body. The four lead screws penetrate through the four corners of the carriage, and the two optical axes penetrate through the diagonal corners of the carriage. When the four lead screws rotate synchronously, they drive the carriage to vertically lift along the optical axes.

[0007] Preferably, synchronous belt wheels are provided at the bottom ends of the lead screws. The two adjacent synchronous belt wheels on the same side are connected by a synchronous belt. The synchronous belt extends towards the vacuum adsorption platform through two steering wheels and is connected to a stepping motor. After the stepping motor operates, it drives the carriage to lift through the lead screws.

[0008] Preferably, the print head is mounted on the X-axis through a sliding base. A first towing belt is provided inside the X-axis, and the end of the first towing belt is fixedly connected to the sliding base. The extension of the first towing belt drives the print head to move along the X-axis.

[0009] Preferably, both ends of the X-axis are mounted on the Y-axis. A second towing belt is provided on the bracket, and the end of the second towing belt is fixedly connected to the X-axis. The extension of the second towing belt drives the X-axis to move on the Y-axis.

[0010] Preferably, there are two sets of the fan and the hot and cold air system, which are arranged oppositely.

[0011] Preferably, the hot and cold air system includes a sheet metal part, which is fixed on the side wall of the printer body. A cross-flow fan is provided on one side of the sheet metal part, and a PTC air heater is provided on the other side.

[0012] Preferably, four groups of bellows are also provided at the four corners of the bracket. Each group of bellows includes two upper and lower parts. The top of the upper bellows is connected to the inner top wall of the printer body, and the bottom is connected to the surface of the bracket. The top of the lower bellows is connected to the bottom surface of the bracket, and the bottom is connected to the inner bottom wall of the printer body.

[0013] Preferably, a sealed material bin is further provided outside the printer body, and the sealed material bin is communicated with the print head through a conduit.

[0014] Preferably, the sealed material bin includes a bin cover at the top. The bin cover is hinged to the sealed material bin through an adjustable damping hinge. A sealing strip is provided at the opening of the sealed material bin, and a handle is provided on the outside.

[0015] A granular material 3D printer with chamber temperature disclosed by the present invention includes a printer body. A fan is provided on one side of the printer body, and a hot and cold air system is provided on the opposite side. A filtered air outlet is provided above the hot and cold air system. A vacuum adsorption platform is provided inside the chamber of the printer body. A liftable bracket is provided above the vacuum adsorption platform. An X-axis and a Y-axis are provided on the bracket. A print head is provided on the X-axis, and the print head can reciprocate along the X-axis. When the four lead screws rotate synchronously, the bracket is driven to vertically lift along the optical axis; compared with the prior art, when in use, the granular material 3D printer with chamber temperature can adjust the hot and cold air circulation according to the characteristics of the granular material, which helps to cool the model and ensure the chamber temperature. In addition, the stable lifting of the bracket can improve the printing accuracy, and at the same time, the setting of the bellows is also beneficial to improving the heating efficiency of the chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of a granular material 3D printer with chamber temperature of the present invention Figure 1 .

[0017] Figure 2 Schematic diagram of the overall structure of a 3D printer for granular materials with chamber temperature of the present invention Figure 2 。

[0018] Figure 3 Schematic diagram of the internal structure of a 3D printer for granular materials with chamber temperature of the present invention Figure 1 。

[0019] Figure 4 Schematic diagram of the internal structure of a 3D printer for granular materials with chamber temperature of the present invention Figure 2 。

[0020] Figure 5 Schematic diagram of the structure of the carriage in a 3D printer for granular materials with chamber temperature of the present invention Figure 1 。

[0021] Figure 6 Schematic diagram of the structure of the carriage in a 3D printer for granular materials with chamber temperature of the present invention Figure 2 。

[0022] Figure 7 Of the present invention Figure 4 Enlarged schematic diagram of the structure at position A

[0023] Figure 8 Of the present invention Figure 5 Enlarged schematic diagram of the structure at position B

[0024] Figure 9 Of the present invention Figure 5 Enlarged schematic diagram of the structure at position C

[0025] Figure 10 Of the present invention Figure 6 Enlarged schematic diagram of the structure at position D

[0026] Figure 11 Schematic diagram of the structure of the hot and cold air system in a 3D printer for granular materials with chamber temperature of the present invention

[0027] Figure 12 Schematic diagram of the structure of the sealed material bin in a 3D printer for granular materials with chamber temperature of the present invention

[0028] In the figure: 1. Printer body; 11. Fan; 12. Filter air outlet; 2. Vacuum adsorption platform; 3. Bracket; 31. X-axis; 32. Y-axis; 33. Printer head; 34. First towing belt; 35. Towing belt slot; 36. Second towing belt; 4. Optical axis; 5. Lead screw; 51. Synchronous pulley; 52. Synchronous belt; 53. Steering wheel; 54. Stepper motor; 6. Organ cloth; 7. Hot and cold air system; 71. Sheet metal; 72. Cross flow fan; 73. PTC air heater; 8. Sealed silo; 81. Silo cover; 82. Sealing strip; 83. Adjustable damping hinge; 84. Handle; 85. Conduit. DETAILED DESCRIPTION

[0029] The present invention will now be described in further detail with reference to the accompanying drawings. The accompanying drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and thus only show the components related to the present invention.

[0030] Please refer to Figure 1-12 A granular material 3D printer with chamber temperature comprises a printer body 1, a fan 11 is arranged on one side of the printer body 1, a hot and cold air system 7 is arranged on the other side opposite thereto, a filter outlet 12 is arranged above the hot and cold air system 7, four exhaust fans are arranged on the inner side of the filter outlet, and filter cotton is arranged in the filter outlet 12, and the filter cotton is composed of 400*400*20 oversized filter cotton hepa + activated carbon. When printing, the exhaust fan is used to extract the gas in the cavity to ensure that the poisonous gas or dust particles are discharged out of the cavity after being filtered; a vacuum adsorption platform 2 is arranged in the cavity of the printer body 1, a liftable bracket 3 is arranged above the vacuum adsorption platform 2, an X-axis 31 and a Y-axis 32 are arranged on the bracket 3, a printer head 33 is arranged on the X-axis 31, and the printer head 33 can reciprocate along the X-axis 31, and the X-axis 31 can reciprocate on the Y-axis 32.

[0031] The printer body 1 is further provided with two optical axes 4 and four lead screws 5. The four lead screws 5 are arranged through the four corners of the bracket 3, and the two optical axes 4 are arranged through the diagonal parts of the bracket 3. When the four lead screws 5 rotate synchronously, they drive the bracket 3 to rise and fall vertically along the optical axes 4. At the same time, the bottom ends of the lead screws 5 are provided with synchronous pulleys 51, and the two adjacent synchronous pulleys 51 on the same side are connected by a synchronous belt 52. The synchronous belt 52 extends toward the vacuum adsorption platform direction 2 through two steering wheels 53 and is connected to the stepper motor 54. After the stepper motor 54 is running, it drives the bracket 3 to rise and fall through the lead screws 5.

[0032] In this embodiment, the lead screw 5 is a ball screw, and a lead screw nut cooperating with the ball screw is provided on the bracket.

[0033] That is to say, the print head 33 can move horizontally along the X-axis 31 and can also move vertically through the X-axis 31 and the Y-axis 32; when the stepper motor 54 operates, it can also lift the carriage 3 vertically through the lead screw 5, so that the print head 33 moves in the X, Y, and Z directions to achieve printing at different positions.

[0034] Specifically, the print head 33 is mounted on the X-axis 31 through a sliding base. A first tow strap 34 is provided inside the X-axis 31. The end of the first tow strap 34 is fixedly connected to the sliding base. The extension of the first tow strap 34 drives the print head 33 to move along the X-axis 31. Both ends of the X-axis 31 are mounted on the Y-axis 32. A second tow strap 36 is provided on the carriage 3. The end of the second tow strap 36 is fixedly connected to the X-axis 31. The extension of the second tow strap 36 drives the X-axis 31 to move on the Y-axis 32. Here, the Y-axis 32 can be understood as a guide rail.

[0035] Both the first tow strap 34 and the second tow strap 36 are driven by a stepper motor and a speed reducer, which will not be elaborated here.

[0036] In some embodiments, both the fan 11 and the hot and cold air system 7 are in two groups and are arranged oppositely, and each group of fans includes two.

[0037] The hot and cold air system 7 includes a sheet metal part 71, which is fixed on the side wall of the printer body 1. A cross-flow fan 72 is provided on one side of the sheet metal part 71, and a PTC air heater 73 is provided on the other side.

[0038] The fan 11 is provided for two purposes. One is to circulate the air blown out by the cross-flow fan 72 on the opposite side, and the other is to cool the model.

[0039] A control circuit is also provided on the sheet metal part 71. The control circuit can independently control the working states (turning on and speed regulation) of the cross-flow fan 72 and the PTC air heater 73. The cross-flow fan 72 is responsible for blowing air, and the PTC air heater 73 is responsible for generating heat.

[0040] When printing materials that need to be cooled, such as PLA pellet materials and carbon fiber pellet materials, the circuit controls the cross-flow fan 72 to work, and the PTC air heater 73 does not work. The 4 fans 11 on the left side of the cavity work to form an adjustable cold air flow; the fans 11, the cross-flow fan 72 and the turbine fan on the print head together form a model cooling system, which greatly enhances the heat dissipation of the model, so as to print a model with higher quality and better surface.

[0041] When printing consumables that require chamber temperature, such as ABS and nylon, the circuit controls the cross-flow fan 72 and the PTC air heater 73 to work simultaneously. The air output by the cross-flow fan 72 is heated by the PTC air heater 73 and blown into the chamber. The four fans 11 on the left side of the chamber work to form a circulation of hot air inside the chamber, thereby achieving the effect of increasing the chamber temperature and making the internal temperature distribution uniform.

[0042] Furthermore, four groups of bellows 6 are provided at the four corners of the bracket. Each group of bellows 6 includes two pieces, the top of the upper bellows 6 is connected to the inner top wall of the printer body 1, and the bottom is connected to the surface of the bracket 3. The top of the lower bellows 3 is connected to the bottom surface of the bracket, and the bottom is connected to the inner bottom wall of the printer body 1.

[0043] That is to say, 8 pieces of bellows 6 are fixed on the bracket 3. The bellows not only enclose the transmission components such as the ball screw, lead screw nut, optical axis, and linear bearing in the Z-axis direction to prevent dust from entering and affecting performance. After the hot air system is turned on and the chamber temperature rises, it can also isolate the heat inside the chamber, prevent the heat from entering the motion system in the Z-axis, reduce the loss of lubricating oil and the aging of moving parts. It can also reduce the volume inside the chamber, make the temperature inside the chamber rise faster, and be more energy-efficient.

[0044] As a preferred solution, a sealed material bin 8 is further provided outside the printer body 1, and the sealed material bin 8 is connected to the printer head 1 through a conduit 85.

[0045] Specifically, the sealed material bin 8 includes a bin cover 81 at the top. The bin cover 81 is hinged to the sealed material bin 8 through an adjustable damping hinge 83. The setting of the adjustable damping hinge 83 can enable the bin cover 81 to hover at any position. A sealing strip 82 is provided at the opening of the sealed material bin 8, and the whole is sealed by the sealing strip; after sealing, it is not only beneficial for the blowing of the blower, and the airflow will not flow too much into the material bin after the material bin is sealed, so that the airflow finally blows towards the printer head direction to achieve stable and rapid automatic feeding. In addition, when printing, the sealed material bin can also ensure that the moisture in the air does not enter the inside, ensuring the dryness of the granular material; a handle 83 is provided on the outside.

[0046] During use, the dried granular material is added to the sealed material bin 8. The granular material is sent to the printer head bin through the pneumatic conveying system. After using for a period of time and lacking granular material, the detection switch is triggered, the program controls the solenoid valve to open, and then the granular material is conveyed from the sealed material bin 8 to the printer head.

[0047] Based on the above embodiments, the vacuum adsorption platform 2 can also adopt heated vacuum adsorption + PEI film. During 3D printing, the PEI film is adsorbed on the platform surface through a vacuum pump; after printing is completed, the vacuum pump is turned off, the model and the PEI film are taken out together, and then the PEI film is peeled off from the model, which is simple and fast.

[0048] Obviously, the above embodiments are merely examples given for clear illustration and not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or alterations can be made based on the above description. It is not necessary and impossible to enumerate all implementation manners here. And the obvious changes or alterations derived therefrom still fall within the protection scope of the present invention.

Claims

1. A granular material 3D printer with chamber temperature, characterized in that, The invention comprises a printer body, a fan is arranged on one side of the printer body, a hot and cold air system is arranged on the other side opposite thereto, a filter outlet is arranged above the hot and cold air system, a vacuum adsorption platform is arranged in the chamber of the printer body, a liftable bracket is arranged above the vacuum adsorption platform, an X-axis and a Y-axis are arranged on the bracket, a printer head is arranged on the X-axis, the printer head can reciprocate along the X-axis, and the X-axis can reciprocate on the Y-axis.

2. The pellet 3D printer with chamber temperature according to claim 1, characterized in that The printer body is also provided with two optical axes and four lead screws, the four lead screws are arranged through the four corners of the bracket, and the two optical axes are arranged through the diagonal parts of the bracket. When the four lead screws rotate synchronously, the bracket is driven to rise and fall vertically along the optical axes.

3. The pellet 3D printer with chamber temperature according to claim 2, characterized in that A synchronous pulley is provided at the bottom end of the lead screw, and two adjacent synchronous pulleys on the same side are connected by a synchronous belt transmission. The synchronous belt extends toward the vacuum adsorption platform through two steering wheels and is connected to the stepper motor transmission. After the stepper motor is running, the bracket is driven to rise and fall through the lead screw.

4. The pellet 3D printer with chamber temperature according to any one of claims 1-3, characterized in that, The printer head is installed on the X-axis through a sliding base. A first drag is provided on the inner side of the X-axis. The end of the first drag is fixedly connected to the sliding base. The extension of the first drag drives the printer head to move along the X-axis.

5. The pellet 3D printer with chamber temperature according to claim 4, characterized in that Both ends of the X-axis are mounted on the Y-axis, a second towing belt is arranged on the bracket, an end of the second towing belt is fixedly connected to the X-axis, and the extension of the second towing belt drives the X-axis to move on the Y-axis.

6. The pellet 3D printer with chamber temperature according to claim 1, characterized in that, The fans and the cold and hot air systems are both in two groups and are arranged opposite to each other.

7. The pellet 3D printer with chamber temperature according to claim 6, characterized in that The cold and hot air system comprises a sheet metal part which is fixed on the side wall of the printer body. A cross-flow fan is arranged on one side of the sheet metal part, and a PTC air heater is arranged on the other side.

8. The pellet 3D printer with chamber temperature according to claim 1, characterized in that, Four groups of accordion cloths are also provided at the four corners of the bracket, and each group of accordion cloths includes two pieces, the top of the upper accordion cloth is connected to the inner top wall of the printer body, and the bottom is connected to the surface of the bracket; the top of the lower accordion cloth is connected to the bottom surface of the bracket, and the bottom is connected to the inner bottom wall of the printer body.

9. The pellet 3D printer with chamber temperature according to any one of claims 1, 2, 3, 6, 7, and 8, characterized in that, A sealed material bin is also provided on the outside of the printer body, and the sealed material bin is communicated with the printer head through a conduit.

10. The pellet 3D printer with chamber temperature according to claim 9, characterized in that, The sealed material bin comprises a material bin cover at the top, the material bin cover is hinged to the sealed material bin through an adjustable damping hinge, a sealing strip is arranged at the opening of the sealed material bin, and a handle is arranged on the outer side.

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