Photopolymer 3D printing nozzle

Abstract

This invention relates to a photopolymerization 3D printing nozzle, belonging to the field of plastic molding technology. It includes an extrusion device, a fixing device, a barrel, a light-transmitting head, a deflecting and reflecting device, and a deflecting magnetic device. The fixing device is mounted on the barrel, the extrusion device is mounted on the barrel, the light-transmitting head is mounted at the end of the barrel, and several light sources are installed on the light-transmitting head. A deflection cavity is provided on the light-transmitting head, and the deflecting and reflecting device is rotatably mounted within the deflection cavity. The deflecting and reflecting device is made of a permanent magnet. The deflecting magnetic device is mounted on the deflection cavity and seals the deflection cavity. The deflection cavity is filled with industrial-grade white oil. The deflecting and reflecting device has a buoyancy chamber. A diameter controller is provided at the output end of the material flow channel, and two bent elastic control plates are formed on the lower side of the diameter controller. The deflecting magnetic device pushes the deflecting and reflecting device to deflect, thereby changing the curing area and achieving adjustable printing accuracy.

Description

Technical Field

[0001] This invention relates to the field of plastic molding technology, and in particular to a photopolymerization 3D printing nozzle. Background Technology

[0002] UEP (Unified Photopolymer Printing Head), U: light source; E: extrusion pressure; P: printing. UEP is a type of print head that extrudes photopolymer resin under extrusion pressure and cures it under the directional irradiation of a light source to achieve the desired shape.

[0003] The photocurable printhead includes a photocurable printhead housing and a barrel. The crystal photocurable printhead housing is a hollow shell with an open bottom. The inner dimensions of the housing are the same as the inner diameter of the barrel. From top to bottom, the outer side of the housing is provided with a light source fixing bracket and a reflector fixing bracket. The barrel is connected to the photocurable printhead housing. The light source shines on the output end of the photocurable printhead housing to achieve curing and molding after extrusion.

[0004] The existing technologies mentioned above can only carry out the curing process after the photocurable resin is extruded. Once the resin is extruded, it will collapse. Existing technologies have also developed a solution that uses transparent materials to constrain the photocurable resin during extrusion. In this way, the light source can start curing and irradiating immediately after extrusion. However, the irradiation range is not easy to adjust, the diameter of the cured material is not easy to adjust, and the printing accuracy is difficult to adjust. Summary of the Invention

[0005] To overcome the technical defects of existing technologies, this invention provides a photopolymerization 3D printing nozzle that enables variations in the curing area and allows for adjustable control of printing precision.

[0006] The technical solution adopted in this invention is:

[0007] A photopolymer 3D printing nozzle includes an extrusion device, a fixing device, a barrel, a light-transmitting head, a deflecting and reflecting device, and a deflecting magnetic device. The fixing device and the extrusion device are mounted on the barrel. The light-transmitting head is mounted at the end of the barrel and has several light sources. The light-transmitting head has a deflection cavity, and the deflecting and reflecting device is rotatably mounted within the deflection cavity. The deflecting and reflecting device is made of a permanent magnet and has a reflector mounted on it. The deflecting magnetic device is mounted on the deflection cavity. The deflecting magnetic device seals the deflection cavity, which is filled with industrial-grade white oil. The deflecting reflector has a buoyancy cavity. The output end of the material outlet channel is equipped with a diameter controller, which is installed at the end of the material outlet channel by interference fit. Two elastic control plates are formed on the lower side of the diameter controller, which bend towards the inside of the material outlet channel. Each elastic control plate is made of transparent plastic. The light beam passes through each elastic control plate and irradiates the material outlet channel. The deflecting magnetic device drives the deflecting reflector to deflect.

[0008] Preferably, the extrusion device includes an extrusion motor and a screw, the screw being rotatably mounted inside a barrel, the extrusion motor being mounted on the barrel, and the injection motor being drivenly connected to the screw.

[0009] Preferably, the extrusion device includes a linear motor and a piston, the piston sliding along the barrel, the linear motor being mounted on the barrel, and the piston being mounted on the output end of the linear motor.

[0010] Preferably, the material cylinder is provided with threads on the outside, and the fixing device includes two clamping nuts and two anti-loosening washers. The two clamping nuts are installed on the outside of the material cylinder through a threaded pair, and the two anti-loosening washers are located between the two clamping nuts.

[0011] Preferably, the material cylinder and the light-transmitting head are interference-fitted.

[0012] Preferably, the light-transmitting head is made of crystal, glass, or transparent resin.

[0013] Preferably, the deflecting reflector includes a deflecting mirror and a deflecting reference cone. The deflecting reference cone is installed in the deflection cavity. The deflecting mirror has a swing groove adapted to the deflecting reference cone. The deflecting magnetic device has a limiting post that restricts the deflecting mirror. After the deflecting magnetic device is energized, the distance between the limiting post and the deflecting mirror is less than the depth of the swing groove. The deflecting mirror is made of a permanent magnet. A reflector is installed on the deflecting mirror. Several grooves are formed on the side of the deflecting mirror away from the reflector. The top of the grooves is covered with a sealing plate. The average density of the deflecting mirror is equal to the density of industrial-grade white oil.

[0014] Preferably, the deflecting magnetic device includes a deflecting mounting plug and two deflecting electromagnets, the two deflecting electromagnets being mounted on the deflecting mounting plug and corresponding to the two ends of the deflecting reflector.

[0015] The beneficial effects of this invention are:

[0016] A fixing device is installed on the barrel, thus realizing the installation of the barrel. An extrusion device is installed on the barrel, thus realizing the extrusion of the light-curing resin. A light-transmitting head is installed at the end of the barrel. Several light sources are installed on the light-transmitting head. The light-curing resin is cured after being irradiated by the light sources. The light-transmitting head has a deflection cavity. A deflection and reflection device is installed in the deflection cavity. The deflection and reflection device is made of permanent magnet to avoid rust and facilitate the attitude control by magnetic force. A reflector is installed on the deflection and reflection device. A deflection magnetic device is installed on the deflection cavity and seals the deflection cavity. The deflection cavity is filled with industrial-grade white oil. The deflection and reflection device has a buoyancy cavity to enable the deflection and reflection device to float in the industrial-grade white oil and prevent the weight of the deflection and reflection device from interfering with the control of the deflection magnetic device. The light irradiated by the light source passes through the light-transmitting head and the deflection cavity inside the light-transmitting head until the beam of light irradiates the preset material outflow channel position inside the light-transmitting head.

[0017] The output end of the material outlet channel is equipped with a diameter controller. The diameter controller is installed at the end of the material outlet channel by interference fit. Two elastic control plates are formed on the lower side of the diameter controller, which are bent inward towards the material outlet channel. Each elastic control plate is made of transparent plastic. The light beam passes through each elastic control plate and shines into the material outlet channel. The deflection magnetic device drives the deflection reflector to deflect, thereby changing the curing area and realizing adjustable control of printing accuracy.

[0018] The light beam passes through the elastic control sheet and irradiates the flowing photocurable resin. The flowability of the photocurable resin decreases. When the irradiation angle of the light beam is controlled, the area of ​​photocurable resin irradiated within the elastic control sheet changes. When the area of ​​photocurable resin irradiated increases, the resistance experienced by the elastic control sheet increases, causing the opening of the elastic control sheet to increase. Conversely, when the area of ​​photocurable resin irradiated decreases, the resistance experienced by the elastic control sheet decreases, causing the opening of the elastic control sheet to decrease. This allows for adjustable control of printing accuracy. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention.

[0020] Figure 2 This is a cross-sectional view of the structure of the present invention.

[0021] Figure 3 for Figure 2 Enlarged diagram of point A in the middle.

[0022] Figure 4 for Figure 2 Enlarged diagram of point B in the middle.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Extrusion device; 11. Deflection chamber;

[0025] 2. Fixing device; 21. Clamping nut; 22. Anti-loosening washer;

[0026] 3. Material cylinder;

[0027] 4. Light-transmitting head; 41. Material outflow channel;

[0028] 5. Deflecting reflector; 51. Deflecting mirror; 511. Buoyancy cavity; 512. Swing groove; 52. Deflecting reference cone;

[0029] 6. Deflecting magnetic device; 61. Deflecting mounting plug; 62. Deflecting electromagnet; 63. Limiting post;

[0030] 7. Light source;

[0031] 8. Caliber controller; 81. Flexible control plate. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings:

[0033] like Figure 1 — Figure 4 As shown, this embodiment provides a photocurable 3D printing nozzle, including an extrusion device 1, a fixing device 2, a barrel 3, a light-transmitting head 4, a deflection and reflection device 5, and a deflection magnetic device 6. The fixing device 2 is installed on the barrel 3, thereby realizing the installation of the barrel 3. The extrusion device 1 is installed on the barrel 3 to realize the extrusion of photocurable resin. The light-transmitting head 4 is installed at the end of the barrel 3, and several light sources 7 are installed on the light-transmitting head 4. The photocurable resin is cured after being irradiated by the light sources 7. This is prior art and will not be described in detail here. The light-transmitting head 4 is provided with a deflection cavity 11, and the deflection and reflection device 5 is rotatably installed in the deflection cavity 11. The device 5 is made of a permanent magnet to prevent rusting and facilitates attitude control via magnetic force. A reflector is installed on the deflecting reflector 5. The deflecting magnetic device 6 is installed on the deflecting cavity 11 and seals the deflecting cavity 11. The deflecting cavity 11 is filled with industrial-grade white oil. The deflecting reflector 5 has a buoyancy cavity 511 to enable the deflecting reflector 5 to float in the industrial-grade white oil, preventing the weight of the deflecting reflector 5 from interfering with the control of the deflecting magnetic device 6. The light irradiated by the light source 7 passes through the light-transmitting head 4 and the deflecting cavity 11 inside the light-transmitting head 4 until the beam irradiates the preset material outflow channel 41 inside the light-transmitting head 4.

[0034] The output end of the material outlet channel 41 is equipped with a diameter controller 8. The diameter controller 8 is installed at the end of the material outlet channel 41 by interference fit. Two elastic control plates 81 are formed on the lower side of the diameter controller 8, which are bent towards the inside of the material outlet channel 41. Each elastic control plate 81 is made of transparent plastic. The light beam passes through each elastic control plate 81 and shines on the material outlet channel 41. The deflection magnetic device 6 drives the deflection reflector 5 to deflect, thereby changing the curing area and controlling the printing accuracy.

[0035] The light beam passes through the elastic control plate 81 and irradiates the flowing photocurable resin. The flowability of the photocurable resin decreases. When the irradiation angle of the light beam is controlled, the area of ​​photocurable resin irradiated within the elastic control plate 81 changes. When the area of ​​photocurable resin irradiated increases, the resistance to the elastic control plate 81 increases, causing the opening of the elastic control plate 81 to increase. Conversely, when the area of ​​photocurable resin irradiated decreases, the resistance to the elastic control plate 81 decreases, causing the opening of the elastic control plate 81 to decrease. This achieves adjustable control of printing accuracy.

[0036] Specifically, the extrusion device 1 includes an extrusion motor and a screw. The screw is rotatably installed inside the barrel 3, and the extrusion motor is installed on the barrel 3. The injection motor is connected to the screw drive to realize the extrusion of the photocurable resin. This is existing technology and will not be described in detail here.

[0037] Specifically, the extrusion device 1 includes a linear motor and a piston. The piston slides along the barrel 3. The linear motor is mounted on the barrel 3, and the piston is mounted on the output end of the linear motor to realize the extrusion of the photocurable resin. This is existing technology and will not be described in detail here.

[0038] Specifically, the material cylinder 3 is provided with threads on the outside, and the fixing device 2 includes two clamping nuts 21 and two anti-loosening washers 22. The two clamping nuts 21 are installed on the outside of the material cylinder 3 through the threaded pair, and the two anti-loosening washers 22 are located between the two clamping nuts 21 to realize the installation of the material cylinder 3.

[0039] Specifically, the barrel 3 and the light-transmitting head 4 are interference-fitted, and the light-curing resin in the barrel 3 is extruded into the light-transmitting head 4 and then extruded from the light-transmitting head 4.

[0040] Specifically, the light-transmitting head 4 is made of crystal, glass, or transparent resin to avoid obstructing the light source 7.

[0041] Specifically, the deflecting reflector 5 includes a deflecting mirror 51 and a deflecting reference cone 52. The deflecting reference cone 52 is installed inside the deflection cavity 11. The deflecting mirror 51 is provided with a swing groove 512 adapted to the deflecting reference cone 52. The deflecting magnetic device 6 is provided with a limiting post 63 to limit the deflecting mirror 51. The limiting post 63 is used to support the deflecting mirror 51 after the deflecting magnetic device 6 is de-energized, preventing the deflecting mirror 51 from falling. After the deflecting magnetic device 6 is energized, the distance between the limiting post 63 and the deflecting mirror 51 is less than the depth of the swing groove 512. The limiting post 63 prevents the swing groove 512 of the deflection mirror 51 from disengaging from the deflection reference cone 52. The deflection mirror 51 is made of a permanent magnet and a reflector is installed on the deflection mirror 51. The deflection of the deflection mirror 51 changes the area of ​​the illumination area of ​​the light source 7 and changes the printing accuracy. In order to form the buoyancy cavity 511, several grooves are formed on the side of the deflection mirror 51 away from the reflector. The top of the grooves is covered with a sealing plate, so that the buoyancy cavity 511 is formed in the middle of the deflection mirror 51, and the average density of the deflection mirror 51 is equal to the density of industrial grade white oil.

[0042] Specifically, the deflecting magnetic device 6 includes a deflecting mounting plug 61 and two deflecting electromagnets 62. The two deflecting electromagnets 62 are mounted on the deflecting mounting plug 61. The two deflecting electromagnets 62 correspond to the two ends of the deflecting reflector 5 respectively. When the two deflecting electromagnets 62 generate magnetic force individually, they push the deflecting mirror 51 away from the electromagnet, so that the deflecting mirror 51 is deflected. When the two deflecting electromagnets 62 work separately, the deflecting mirror 51 produces two deflection angles, so that the material outflow channel 41 of this application has two extrusion diameters, thereby realizing the control of printing accuracy.

[0043] The foregoing has shown and described the basic principles and main features of the present invention, as well as its advantages. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope. All such changes and modifications fall within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A photopolymer 3D printing nozzle, characterized in that, The device includes an extrusion unit, a fixing unit, a barrel, a light-transmitting head, a deflecting and reflecting device, and a deflecting magnetic device. The fixing unit and the extrusion unit are mounted on the barrel. The light-transmitting head is mounted at the end of the barrel and has several light sources. The light-transmitting head has a deflection cavity, and the deflecting and reflecting device is rotatably mounted within the deflection cavity. The deflecting and reflecting device is made of a permanent magnet and has a reflector mounted on it. The deflecting magnetic device is mounted on the deflection cavity and blocks the deflection. The deflection cavity is filled with industrial-grade white oil. The deflection reflector has a buoyancy cavity. The light-transmitting head has a material outflow channel. The output end of the material outflow channel has a diameter controller. The diameter controller is installed at the end of the material outflow channel by interference fit. Two elastic control plates are formed on the lower side of the diameter controller, which are bent towards the inside of the material outflow channel. Each elastic control plate is made of transparent plastic. The light beam passes through each elastic control plate and irradiates the material outflow channel. The deflection magnetic device drives the deflection reflector to deflect.

2. The photopolymer 3D printing nozzle according to claim 1, characterized in that, The extrusion device includes an extrusion motor and a screw. The screw is rotatably mounted inside the barrel, and the extrusion motor is mounted on the barrel. The extrusion motor is connected to the screw via a drive.

3. The photopolymer 3D printing nozzle according to claim 1, characterized in that, The extrusion device includes a linear motor and a piston. The piston slides along the barrel, the linear motor is mounted on the barrel, and the piston is mounted on the output end of the linear motor.

4. The photopolymer 3D printing nozzle according to claim 1, characterized in that, The material cylinder is threaded on the outside, and the fixing device includes two clamping nuts and two anti-loosening washers. The two clamping nuts are installed on the outside of the material cylinder through a threaded pair, and the two anti-loosening washers are located between the two clamping nuts.

5. The photopolymer 3D printing nozzle according to claim 1, characterized in that, The material cylinder is interference-fitted with the light-transmitting head.

6. The photopolymer 3D printing nozzle according to claim 1, characterized in that, The light-transmitting head is made of crystal, glass, or transparent resin.

7. The photopolymer 3D printing nozzle according to claim 1, characterized in that, The deflecting and reflecting device includes a deflecting mirror and a deflecting reference cone. The deflecting reference cone is installed in the deflection cavity. The deflecting mirror is provided with a swing groove adapted to the deflecting reference cone. The deflecting magnetic device is provided with a limiting post to restrict the deflecting mirror. After the deflecting magnetic device is powered on, the distance between the limiting post and the deflecting mirror is less than the depth of the swing groove. The deflecting mirror is made of a permanent magnet. A reflector is installed on the deflecting mirror. Several grooves are formed on the side of the deflecting mirror away from the reflector. The top of the grooves is covered with a sealing plate. The average density of the deflecting mirror is equal to the density of industrial-grade white oil.

8. The photopolymer 3D printing nozzle according to claim 1, characterized in that, The deflecting magnetic device includes a deflecting mounting plug and two deflecting electromagnets. The two deflecting electromagnets are mounted on the deflecting mounting plug and correspond to the two ends of the deflecting reflector, respectively.

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