CN212555059U - Leveling mechanism for 3D printer and 3D printer - Google Patents

Abstract

The utility model relates to a leveling mechanism for a 3D printer and a 3D printer, which has the key points of the technical proposal that the leveling mechanism comprises a slider fixing bracket, a flat plate switching bracket arranged on the slider fixing bracket and a forming platform detachably connected with the bottom of the flat plate switching bracket; be equipped with the gliding slide opening from top to bottom of a plurality of confession dull and stereotyped switching supports on the slider fixed bolster, be equipped with the elasticity piece that resets between slider fixed bolster and the dull and stereotyped switching support, still include UV lamp module, LCD screen and locate the print box of LCD screen top, the UV lamp module is including locating the leaded light cover of LCD screen below, locating the UV lamp of leaded light cover bottom and locating the heating panel of UV lamp bottom, be equipped with the LED lamp pearl that a plurality of arrays were arranged on the UV lamp, be equipped with fresnel lens on every LED lamp pearl. The utility model has the advantages of avoid crushing to throw the light screen, can the secondary leveling.

Description

Leveling mechanism for 3D printer and 3D printer

Technical Field

The utility model relates to a 3D printer field, more specifically the saying so, it relates to a levelling mechanism and 3D printer for 3D printer.

Background

Along with the continuous progress of scientific technology, traditional dental model manufacturing mode has revealed the drawback gradually, uses 3D printing technique preparation dental model to have advantages such as the accuracy is good, the security is high, the time is short, can provide efficient comprehensive medical service for the patient in step, so design one set of 3D printing apparatus based on the photocuring principle has very important meaning.

Photocuring refers to the process of curing a monomer, oligomer or polymer matrix under light induction. The photocuring technology is a photoprocessing technology which enables photocuring paint to be polymerized into a solid state at a high speed by ultraviolet irradiation with a certain wavelength, and the photocuring reaction is essentially polymerization and crosslinking reaction initiated by light.

In order to cure the material on the platform successfully in the operation process of the existing LCD photocuring 3D printer, the gap between the platform and the light projection screen is required to be small enough (approximately equal to the thickness of each layer of the material being 50-100 μm); and due to the fragility and the tidy requirement of the projection screen, the platform can not rigidly extrude the projection screen. However, the position of the platform is too low due to errors or residual platform materials, so that the platform directly contacts or even extrudes the projection screen, and the projection screen is damaged, the existing leveling mode of the LCD photocuring 3D printer is usually fixed, a manufacturer fixes the parallelism of the printing platform before leaving a factory, so that a user cannot level for the second time, spare parts have a fatigue wear period in actual use, the platform can only be scrapped and replaced after the platform is worn, and key parts of the printing platform expand with heat and contract with cold due to collision in daily use or environmental temperature, so that the platform cannot be used continuously when the platform is inclined, and the service life of the printing platform is short.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an above-mentioned problem to exist among the prior art provides one kind and avoids crushing to throw the light screen, can carry out leveling mechanism and 3D printer for the 3D printer of secondary leveling.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme: a leveling mechanism for a 3D printer comprises a sliding block fixing support, a flat plate switching support arranged on the sliding block fixing support and a forming platform detachably connected with the bottom of the flat plate switching support; the sliding block fixing support is provided with a plurality of sliding holes for the flat plate switching support to slide up and down, and an elastic reset piece is arranged between the sliding block fixing support and the flat plate switching support.

The working principle is as follows: when in use, when the sliding fixed bracket moves downwards along with the linear motion module on the 3D printer and is abutted to the projection screen, the forming platform is extruded, thereby driving the flat plate switching bracket to slide upwards in the sliding hole, compressing the elastic reset piece, playing a certain buffer role by the elastic reset piece, leading the projection screen not to be crushed at the moment of contact, meanwhile, the design of a plurality of sliding holes can limit the rotational freedom degree of the flat plate switching bracket, namely the flat plate switching bracket can be prevented from inclining, the flatness of the flat plate switching bracket is ensured, and because of the arrangement of the elastic reset piece, the sliding block fixing bracket and the flat plate switching bracket always have certain clearance, so that the molding platform can be leveled for the second time, meanwhile, the situation that the forming platform is inclined due to the fact that the parts are tightly matched after expansion with heat and contraction with cold is avoided.

Furthermore, every be equipped with in the slide opening with dull and stereotyped switching support can dismantle the spacing axle of being connected, be equipped with the adjusting screw who is used for adjusting the distance between slider fixed bolster and the dull and stereotyped switching support on the slider fixed bolster, adjusting screw at least part penetrates in the elasticity piece that resets. Adopt the setting of above-mentioned structure, can conveniently adjust the distance between slider fixed bolster and the dull and stereotyped switching support through adjusting screw, this distance is also the distance that dull and stereotyped switching support can rise, go back when dull and stereotyped switching support rises to furthest with adjusting screw bottom butt, and elasticity resets and can play the cushioning effect equally, as long as adjust adjusting screw stretches into the length of slider fixed bolster, just can conveniently adjust the minimum distance between slider fixed bolster and the dull and stereotyped switching support, adjusting screw can also play the effect that prevents elasticity and reset a horizontal migration.

Furthermore, a plurality of equal-height columns are arranged between the flat plate switching support and the forming platform, the flat plate switching support comprises a bottom plate detachably connected with the equal-height columns, and a left fixing block and a right fixing block which are detachably arranged on the bottom plate, and the left fixing block and the right fixing block are respectively arranged at two ends of the limiting shaft. By adopting the structure, the forming platform can be conveniently installed on the bottom plate, and the bottom plate is installed on the limiting shaft through the left and right fixing blocks, so that the flat plate transfer support can be conveniently installed on the sliding block fixing support.

Furthermore, a plurality of through holes arranged in an array are arranged on the forming platform. Through the setting of above-mentioned structure, printing material can flow in the through-hole, can effectively solve because the shaping area is too big, and printing in-process can not in time be supplemented at the dull and stereotyped intermediate material of shaping to lead to because the too big fashioned problem of unable of leading to of platform.

The utility model provides a 3D printer, includes foretell leveling mechanism, still includes UV lamp module, LCD screen and locates the print cartridge of LCD screen top, the UV lamp module is including locating the leaded light cover of LCD screen below, locating the UV lamp of leaded light cover bottom and locating the heating panel of UV lamp bottom, be equipped with the LED lamp pearl that a plurality of arrays were arranged on the UV lamp, be equipped with fresnel lens on every LED lamp pearl. Because when setting up photocuring resin, the light content that is suitable for the wavelength of photocuring resin is very low, this makes in the curing process need pay out very big waste just can make the resin produce very little reaction, adopt the setting of above-mentioned structure, when the depth of parallelism of shaping platform has been guaranteed, structure through the UV lamp can make light vertical lighting to the LCD screen, also improve the utilization ratio when improving the homogeneity of illumination, shorten the print time, waste is reduced, and the setting of heating panel can effectively dispel the heat to the UV lamp, avoid LED lamp damage and shaping precision problem, the LCD screen is the screen of throwing light exactly.

Furthermore, the printing material box comprises a material box main body, a material box pressing plate detachably connected with the material box main body, a release film and a material box frame for fixing the material box pressing plate. Adopt the setting of above-mentioned structure, the use from the type membrane is in order to make material and light projector screen not direct contact, prevents that the screen from being contaminated, moreover with magazine clamp plate and the independent design of magazine main part for can assemble simple to operate in other places from type membrane and magazine clamp plate.

Furthermore, heat conduction silicone grease is arranged between the UV lamp and the heat dissipation plate, and at least one first heat dissipation fan is arranged below the heat dissipation plate. Adopt the setting of above-mentioned structure, fill the tiny clearance between UV lamp and the heating panel through heat conduction silicone grease for the UV lamp can fully contact with the heating panel, has increased heat radiating area, has improved the radiating effect, then carries out the forced air cooling heat dissipation to the heating panel through first radiator fan, and the radiating effect is good.

Further, still include the housing, be equipped with the installation main platform on the housing and can dismantle the linear motion module of locating on the installation main platform, the magazine can be dismantled and locate installation main platform top, the LCD screen can be dismantled and locate on the installation main platform, be equipped with the screen protection layer between LCD screen and the magazine. Adopt the setting of above-mentioned structure, drive levelling mechanism up-and-down motion through common rectilinear motion module, the LCD screen is installed on installation primary platform, can further prevent through the screen protection layer that the LCD screen from being damaged.

Furthermore, the mounting main platform is detachably provided with at least one second cooling fan, and the housing is provided with a plurality of cooling holes. By adopting the structure, the heat can be effectively dissipated in the housing, and the forming quality is ensured.

Furthermore, the device also comprises a control module and a touch screen which is detachably arranged on the housing. By adopting the structure, each electrical device is controlled by the control module, information is displayed and man-machine interaction is carried out through the touch screen, and the operation is convenient.

Compared with the prior art, the leveling mechanism for the 3D printer and the 3D printer which adopt the technical scheme have the following beneficial effects:

1: when the sliding fixing support moves downwards along with a linear motion module on the 3D printer and is abutted to the light projection screen, the forming platform is extruded, so that the flat plate switching support is driven to slide upwards in the sliding hole, the elastic reset piece is compressed, and the elastic reset piece plays a certain buffering role, so that the light projection screen cannot be crushed at the moment of contact;

2: the design of the plurality of sliding holes can limit the rotational freedom degree of the flat plate switching support, namely the flat plate switching support can be prevented from inclining, the flatness of the flat plate switching support is ensured, and due to the arrangement of the elastic reset piece, the sliding block fixing support and the flat plate switching support always have a certain gap, so that the forming platform can be leveled for the second time, and meanwhile, the condition that the forming platform inclines due to the close fit between parts after expansion with heat and contraction with cold can be avoided;

3: the structure through the UV lamp can make light vertical irradiation to the LCD screen, has also improved the utilization ratio when improving the homogeneity of illumination, shortens the print time, has reduced the waste, and the setting up of heating panel can effectively dispel the heat to the UV lamp moreover, avoids LED lamp to damage and shaping precision problem.

Drawings

Fig. 1 is a first perspective view of the present invention;

fig. 2 is a top view of the present invention;

FIG. 3 is an isometric sectional view taken along line B-B of FIG. 2;

FIG. 4 is an isometric sectional view A-A of FIG. 2;

FIG. 5 is an enlarged view of A in FIG. 4;

FIG. 6 is an enlarged view of B in FIG. 4;

FIG. 7 is an enlarged view of C in FIG. 4;

FIG. 8 is a schematic diagram of a control module;

fig. 9 is an exploded view of the cartridge body.

In the figure, 1, a sliding block fixing bracket; 2. a plate transfer bracket; 3. a forming platform; 11. a slide hole; 4. an elastic reset member; 5. a limiting shaft; 12. adjusting the screw rod; 6. an equal-height column; 21. a base plate; 22. a left fixed block; 23. a right fixed block; 31. a through hole; 7. a UV lamp module; 8. an LCD screen; 9. a print cartridge; 71. a light guide cover; 72. a UV lamp; 73. a heat dissipation plate; 721. LED lamp beads; 91. a cartridge body; 92. a material box pressing plate; 93. a release film; 94. a material box frame; 74. a first heat dissipation fan; 10. a housing; 101. installing a main platform; 102. a linear motion module; 103. a screen protection layer; 104. a second heat dissipation fan; 105. heat dissipation holes; 106. touch screen; 107. a window; 1021. a stepping motor; 1022. a linear guide rail; 1023. connecting blocks; 108. a USB data jack; 109. a switch button; 1010. a power outlet; 1011. a handle; 1012. a clamping device.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 to 9, the 3D printer includes a housing 10 formed by bending and welding a plurality of cold plates, windows 107 formed by two acrylic plates are further installed on the left and right sides of the housing 10, an installation main platform 101 is installed inside the housing 10, and the housing 10 is divided into an upper portion and a lower portion by the installation main platform 101.

In this embodiment, the upper portion is a printing area, and includes a print cartridge 9 and a linear motion module 102, where the linear motion module 102 is composed of a stepping motor 1021 and a linear guide 1022, a connection block 1023 for installing an adjusting mechanism is installed on a slide block of the linear guide 1022, the stepping motor 1021 drives the connection block 1023 to slide up and down on the linear guide by a screw transmission manner, where the stepping motor 1021 adopts a 57HS56D8EIS two-phase closed-loop stepping motor 1021, a stepping angle is 1.8 °, a current is 3A, a driver is set at 8 segments, the stepping motor 1021 is controlled by a common driver, and a controller is connected with the control module. Then:

the number of pulses is: 200 x 4=800

The pulse equivalent is: 5/800=0.00625mm

Namely, when the driver outputs a positioning pulse, the distance of the forming platform 3 moving up and down along the Z axis is 0.00625mm, and the precision can meet the requirement of printing +/-0.05 mm precision products. Of course, the linear motion module 102 can be directly replaced by the existing commercially available linear module, so that the installation cost is lower, and the design cost is lower.

The lower part is the main electrical equipment, including UV lamp module 7, LCD screen 8 and control module, has installed common touch screen 106 and USB data jack 108 and shift knob 109 on housing 10 surface, and power socket 1010 in addition, the handle 1011 that conveniently carries and draws in addition.

In this embodiment, the control module is divided into seven parts, namely an upper computer software, a touch screen interface module, an SD card interface module, a stepping motor 1021 control module, a power supply and a lamp panel interface.

The upper computer software adopts Nano DLP control software, and can obtain the complete control right of the DLP 3D printer taking raspberries as a host. Nano DLP has the functions of audio prompting, network detection, password protection and the like. The printing progress can be monitored through the browser during printing. Nano DLP is also compatible with SLC and PNG file formats. When linking, only Raspbian is installed on the SD card and runs on the raspberry root by using instructions. Then, the raspberry pi is connected with Nano DLP through a web browser and enters software, so that the printer can be remotely operated through a webpage. Its outputs are all from the bramble pie HDMI port.

The touch screen connected with the touch screen interface module adopts an X5 series serial port screen developed by the ceramic carrier company. The serial port screen can configure I/O into input state or output state through software configuration, support TTL and other communication interfaces, and the product structure can be customized according to the requirements of users. These all very big convenient development and use.

Step motor 1021 control module mainly has driver, 3D printer DIY mainboard and stopper to constitute for step motor 1021 control module, with driver, stopper, step motor 1021 be connected to 3D printer DIY mainboard above, rethread touch-sensitive screen will realize step motor 1021 and remove and limit function, wherein 3D printer DIY mainboard is MKS Gen V1.4 Ramps1.4& 2560.

The power supply converts 48V voltage into 12V power through the voltage stabilizer and then inputs the 12V power into the control module, and the printer power supply module consists of a 220V-to-48V direct current power supply and a DC-DC boost adjustable voltage-stabilized power supply module. The DC power supply module reduces the 220V AC power supply to 48V DC power supply, and the voltage is regulated to 58V by the voltage boosting and stabilizing power supply module. Although lamp pearl light intensity is very high when voltage is higher than 60V through the test, lamp pearl life also reduces, and the lamp plate temperature is too high simultaneously. Although the printing time can be shortened by the high light intensity, the service life of the lamp beads is greatly reduced, and the forming precision is not good. Therefore, the voltage of 48V can ensure that the intensity of the UV lamp 72 reaches the requirement of light curing, the service life of the lamp bead is prolonged, and the lamp bead is prevented from being damaged. Meanwhile, under the illumination intensity, the printing time of each layer is only 1.5 seconds, so that the printing time is shortened.

In this embodiment, UV lamp module 7 is including locating the light guide cover 71 of LCD screen 8 below, locating the UV lamp 72 of light guide cover 71 bottom and locating the heating panel 73 of UV lamp 72 bottom, be equipped with the LED lamp pearl 721 that a plurality of arrays were arranged on the UV lamp 72, be equipped with fresnel lens on every LED lamp pearl 721, wherein LCD screen 8 installs on installation primary platform 101, installs the screen protection layer 103 that common ya keli made on installation primary platform 101, and LED lamp pearl 721 sends 405 mm LED ultraviolet source, and heating panel 73 makes for pure copper.

In this embodiment, a plurality of fins are disposed on the heat dissipating plate 73, a heat conductive silicone grease is disposed between the UV lamp 72 and the heat dissipating plate 73, at least one first heat dissipating fan 74 is disposed below the heat dissipating plate 73, wherein the heat conductive silicone grease is a common MX-8 or sincere 7921, and the first heat dissipating fan 74 is a common 12V fan.

Specifically, the main mounting platform 101 is provided with at least one second heat dissipation fan 104 through screws, the housing 10 is provided with a plurality of heat dissipation holes 105, and the second heat dissipation fan 104 and the first heat dissipation fan 74 also adopt common 12V fans.

In this embodiment, the LCD 8 adopts the liquid crystal display of 13.3 cun 3840 × 2160 resolution ratio, and the shaping precision can reach 0.04 mm, and the luminousness also strengthens greatly, very big improvement light utilization ratio, shortened the print time. Meanwhile, the large screen design can greatly improve the printing efficiency.

Specifically, the print cartridge 9 comprises a cartridge main body 91, a cartridge pressing plate 92 detachably connected with the cartridge main body 91, a release film 93 and a cartridge frame 94 for fixing the cartridge pressing plate 92, the release film 93 is fixed by the cartridge pressing plate 92, then screws are screwed, and the cartridge pressing plate 92 is fixed on the cartridge frame 94 by the screws, so that the release film 93 is in a tight state. The design of the cartridge press plate 92 can effectively prevent the release film 93 from loosening due to long-time printing. The requirement of the installation of the release film 93 is that the release film 93 is flicked by fingers after the installation is finished, so that a crisp sound can be heard, and the purpose is to ensure that the release film 93 does not move along with a platform in the use process, thereby reducing the printing precision.

In the present embodiment, the print cartridge 9 is clamped by two clamping devices 1012 mounted on the mounting main platform 101, and each clamping device 1012 includes an L-shaped clamp block mounted on the mounting main platform 101 by screws and a retaining member mounted on the L-shaped clamp block, by which the print cartridge 9 is clamped and fixed.

This leveling mechanism for 3D printer includes slider fixed bolster 1, locate dull and stereotyped switching support 2 on slider fixed bolster 1 and can dismantle the shaping platform 3 of being connected with dull and stereotyped switching support 2 bottom, the slip fixing base passes through the screw mounting on connecting block 1023, dull and stereotyped switching support 2 includes bottom plate 21 and installs the left fixed block 22 of L shape and right fixed block 23 on bottom plate 21 through the screw, two fixed blocks are installed on a spacing axle 5 through the screw respectively, spacing axle 5 inserts in the slide opening 11 of slider fixed bolster 1, slide opening 11 is the waist hole of vertical setting, still install elasticity reset piece 4 between slider fixed bolster 1 and flat board switching support 2, also be common spring exactly, wherein bottom plate 21 is fixed shaping platform 3 through four common equal high posts 6.

Specifically, an adjusting screw 12 is further mounted on the slider fixing bracket 1, the adjusting screw 12 is in threaded connection with the slider fixing bracket 1, the adjusting screw 12 is used for adjusting the minimum gap between the slider fixing bracket 1 and the bottom plate 21, and the adjusting screw 12 is inserted into the spring.

Preferably, the forming platform 3 is made of common aluminum alloy, and the through holes 31 arranged in an array are processed at the same time.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although the slide block fixing support 1, the flat plate switching support 2, the forming platform 3, the sliding hole 11, the elastic reset piece 4, the limiting shaft 5, the adjusting screw 12, the equal-height column 6, the bottom plate 21, the left fixing block 22, the right fixing block 23, the through hole 31, the UV lamp module 7, the LCD screen 8, the printing material box 9, the light guide cover 71, the UV lamp 72, the heat dissipation plate 73, the LED lamp bead 721 and the material box main body 91 are used more, the terms of the magazine press plate 92, the release film 93, the magazine rim 94, the first cooling fan 74, the housing 10, the main mounting platform 101, the linear motion module 102, the screen protection layer 103, the second cooling fan 104, the cooling hole 105, the touch screen 106, the window 107, the stepping motor 1021, the linear guide 1022, the connection block 1023, the USB data jack 108, the switch button 109, the power jack 1010, the handle 1011, and the clamping device 1012 are not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims (10)

1. A leveling mechanism for a 3D printer is characterized by comprising a sliding block fixing support (1), a flat plate switching support (2) arranged on the sliding block fixing support (1) and a forming platform (3) detachably connected with the bottom of the flat plate switching support (2); the sliding block fixing support is characterized in that a plurality of sliding holes (11) for the flat plate switching support (2) to slide up and down are formed in the sliding block fixing support (1), and an elastic reset piece (4) is arranged between the sliding block fixing support (1) and the flat plate switching support (2).

2. The leveling mechanism for the 3D printer according to claim 1, wherein a limiting shaft (5) detachably connected with the plate adapter bracket (2) is arranged in each sliding hole (11), an adjusting screw (12) is arranged on the slider fixing bracket (1), and at least part of the adjusting screw (12) penetrates into the elastic reset piece (4).

3. The leveling mechanism for the 3D printer according to claim 2, wherein a plurality of equal-height columns (6) are arranged between the flat plate adapter bracket (2) and the forming platform (3), the flat plate adapter bracket (2) comprises a bottom plate (21) detachably connected with the equal-height columns (6) and a left fixing block (22) and a right fixing block (23) detachably arranged on the bottom plate (21), and the left fixing block (22) and the right fixing block (23) are respectively arranged at two ends of the limiting shaft (5).

4. The leveling mechanism for the 3D printer according to claim 1, wherein the forming platform (3) is provided with a plurality of through holes (31) arranged in an array.

5. The 3D printer comprises the leveling mechanism as claimed in any one of claims 1 to 4, and is characterized by further comprising a UV lamp module (7), an LCD screen (8) and a printing material box (9) arranged above the LCD screen (8), wherein the UV lamp module (7) comprises a light guide cover (71) arranged below the LCD screen (8), a UV lamp (72) arranged at the bottom of the light guide cover (71) and a heat dissipation plate (73) arranged at the bottom of the UV lamp (72), a plurality of LED lamp beads (721) arranged in an array are arranged on the UV lamp (72), and a lens is arranged on each LED lamp bead (721).

6. The 3D printer according to claim 5, wherein the print cartridge (9) comprises a cartridge body (91), a cartridge pressure plate (92) detachably connected to the cartridge body (91), a release film (93), and a cartridge rim (94) for fixing the cartridge pressure plate (92).

7. The 3D printer according to claim 5, characterized in that a heat conducting silicone grease is arranged between the UV lamp (72) and the heat dissipating plate (73), and at least one first heat dissipating fan (74) is arranged below the heat dissipating plate (73).

8. The 3D printer according to claim 5, further comprising a housing (10), wherein the housing (10) is provided with a main mounting platform (101) and a linear motion module (102) detachably mounted on the main mounting platform (101), the print cartridge (9) is detachably mounted above the main mounting platform (101), the LCD screen (8) is detachably mounted on the main mounting platform (101), and a screen protection layer (103) is disposed between the LCD screen (8) and the cartridge.

9. The 3D printer according to claim 8, wherein at least one second heat dissipation fan (104) is detachably disposed on the main mounting platform (101), and the housing (10) is provided with a plurality of heat dissipation holes (105).

10. The 3D printer according to claim 8, further comprising a control module and a touch screen (106) removably mounted to the housing (10).

Images