Working platform of FDM printer

Abstract

The working platform structurally comprises a main frame and a printing platform arranged in the main frame, four first sliding rails are arranged on the left side and the right side of the main frame in a pairwise corresponding mode, first sliding blocks are arranged on the first sliding rails in a matched mode, and the four first sliding blocks are distributed in a rectangular shape. The two first sliding blocks on the same side are jointly connected with a mounting base plate, the printing platform is mounted between the two mounting base plates, the printing platform is provided with a limiting assembly used for fixing a printing plate, and an extrusion mechanism is arranged at the position, corresponding to the printing platform, of the top of the main frame. The printing plate is fixed and limited through the limiting assembly, wrong displacement of the printing plate in the printing process or when the printing platform ascends and descends is avoided, and the printing precision is guaranteed.

Description

Technical Field

[0001] The utility model relates to a mechanical fastener, and more specifically, to a working platform of an FDM printer. Background Art

[0002] Fused Deposition Modelling (FDM) technology is another widely used 3D printing technology after Stereolithography Apparatus (SLA) and Laminated Object Manufacturing (LOM). The working principle of FDM is to heat and melt filamentous thermoplastic materials through a nozzle. The bottom of the nozzle is equipped with a fine nozzle. Under program control, the nozzle moves to a specified position according to the data of the 3D model, extrudes and sprays out the liquid material in a molten state and finally solidifies; after the material is ejected, it is deposited on the previously cured material of the previous layer, and the final finished product is formed by layer-by-layer stacking of the materials.

[0003] Before printing, the printer needs to install a corresponding plate on the printing platform according to the material of the printed product. For example, a composite pp plate is installed on the printing platform. This plate can stably print normal temperature pp and tpu materials without heating the platform, and warping will not occur, greatly reducing the problems of manual repeated coating and heating energy consumption; however, the printing platform of the existing printer lacks a limiting mechanism and cannot fix and limit the plate. Content of the Utility Model

[0004] Aiming at the deficiencies of the existing technology, the purpose of the present utility model is to provide a working platform of an FDM printer to solve the above technical problems.

[0005] To achieve the above purpose, the present utility model provides the following technical solution: A working platform of an FDM printer, including a main frame and a printing platform arranged inside the main frame. Four first slide rails are arranged in pairs on the left and right sides of the main frame. The first slide rails are equipped with first sliders, and the four first sliders are distributed in a rectangular shape. Two first sliders on the same side are jointly connected to an installation substrate. The printing platform is installed between the two installation substrates. The printing platform has a limiting component for fixing the printing plate, and an extrusion mechanism is arranged at the top of the main frame corresponding to the printing platform.

[0006] The present utility model is further set as: The limiting component includes a plurality of groups of pairwise corresponding first through grooves opened in the long axis direction of the printing platform, and two second through grooves are correspondingly opened on the left and right at the center of the short axis direction of the printing platform. The first through grooves and the second through grooves are both internally provided with limiting pieces.

[0007] The present utility model is further configured as follows: The limiting member includes a limiting plate adapted to the printing plate and a pressing plate adapted to the mounting substrate. The pressing plate has an extension portion adapted to the first through groove or the second through groove. Two first fixing ears are correspondingly arranged on the outer side surface of the extension portion. A sliding rod is formed on the top surface of the pressing plate at the corresponding positions of the two first fixing ears. The sliding rod is slidably engaged with the corresponding first fixing ear and a limiting ring is formed on the top surface.

[0008] The present utility model is further configured as follows: The extension portion is provided with a second fixing ear at the middle position between the two first fixing ears. A first screw rod is rotatably arranged on the pressing plate at the corresponding position of the second fixing ear. The second fixing ear is provided with a threaded hole adapted to the first screw rod. The lower end of the first screw rod penetrates through and extends below the pressing plate and is connected with a first knob.

[0009] The present utility model is further configured as follows: The limiting plate is an "L"-shaped structure adapted to the outer edge of the printing plate.

[0010] The present utility model is further configured as follows: Four second screw rods are distributed in a rectangular shape at the four corners of the bottom surface of the printing platform. Each mounting substrate is provided with two through holes for the second screw rods to pass through. A spring member is sleeved on the outer side of the second screw rod. The lower end of the second screw rod passes through the through hole and is connected with a second knob.

[0011] The present utility model is further configured as follows: The extrusion mechanism includes two first driving units arranged on the upper part of the main frame. The first driving unit has a y-axis lead screw and the y-axis lead screw is connected with a first positioning block. A second driving unit is arranged between the two first positioning blocks. The second driving unit has an x-axis lead screw and the x-axis lead screw is connected with an extrusion unit.

[0012] In summary, the present utility model has the following beneficial effects: The present utility model fixes and limits the printing plate through the limiting component, avoids the printing plate from having an incorrect displacement during the printing process or when the printing platform is lifted or lowered, and ensures the printing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0014] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0015] Figure 2 It is a schematic diagram of the limiting member of the present utility model for fixing the printing plate;

[0016] Figure 3Structural schematic diagram of the limiting member of the present utility model;

[0017] Figure 4 Structural schematic diagram of the printing platform of the present utility model;

[0018] Figure 5 Cooperating schematic diagram of the printing platform and the mounting substrate of the present utility model;

[0019] Figure 6 Structural schematic diagram of the driving mechanism, the first driving unit and the second driving unit of the present utility model.

[0020] Reference numerals: 1, main frame; 10, first slide rail; 11, first slider; 2, printing platform; 20, first through groove; 21, second through groove; 22, limiting member; 23, limiting plate; 24, pressing plate; 25, extension part; 26, first fixing ear; 27, slide bar; 28, limiting ring; 3, mounting substrate; 30, through hole; 4, second fixing ear; 40, first screw; 41, threaded hole; 42, first knob; 5, second screw; 50, spring member; 51, second knob; 6, first driving unit; 60, y-axis lead screw; 61, first positioning block; 62, second driving unit; 63, x-axis lead screw; 64, extrusion unit; 65, printing plate; 7, fixed substrate; 70, second slide rail; 71, side plate; 72, second motor; 73, first screw hole; 74, connecting plate; 75, third slide rail; 76, second positioning block; 77, second screw hole; 78, third motor; 8, z-axis lead screw; 80, first motor; 81, threaded kit. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0022] Please refer to Figure 1-6 As shown, a working platform of an FDM printer in an embodiment of the present utility model includes a main frame 1 and a printing platform 2 disposed within the main frame 1. Four first slide rails 10 are disposed in pairs on the left and right sides of the main frame 1. The first slide rails 10 are provided with first sliders 11 in a matching manner, and the four first sliders 11 are distributed in a rectangular shape. Two first sliders 11 on the same side are commonly connected to a mounting substrate 3. The printing platform 2 is installed between the two mounting substrates 3. The printing platform 2 has a limiting assembly for fixing the printing plate 65. An extrusion mechanism is disposed at the top of the main frame 1 corresponding to the printing platform 2.

[0023] During use, place the required printing plate 65 adapted to the printing material on the upper surface of the printing platform 2. At this time, the extrusion mechanism extrudes and prints on the printing plate 65, and the printing plate 65 is fixed and limited by the limiting component to prevent the printing plate 65 from having an incorrect displacement during the printing process or when the printing platform 2 moves up and down, ensuring the printing accuracy;

[0024] Through the sliding fit between the first slide rail 10 and the first slider 11, the accuracy and stability of the movement of the printing platform 2 are improved to obtain a higher-quality printed product;

[0025] Among them, a driving mechanism for driving the printing platform 2 to reciprocate up and down along the main frame 1 is arranged in the main frame 1. Specifically, the driving mechanism includes two z-axis lead screws 8 and two first motors 80 fixedly installed inside the main frame 1. The lower ends of the two z-axis lead screws 8 are drivingly connected to the first motors 80 and the other ends are rotatably fitted with the main frame 1. A threaded kit 81 adapted to the z-axis lead screws 8 is formed in the middle of the mounting substrate 3. During operation, start the two first motors 80 to drive the two z-axis lead screws 8 to rotate synchronously. The lower ends of the z-axis lead screws 8 are drivingly connected to the first motors 80 and the upper ends are rotatably fitted with the main frame 1. A mating plate is fixedly installed in the main frame 1 and the upper ends of the z-axis lead screws 8 are rotatably connected to the mating plate. The rotation of the two z-axis lead screws 8 is in threaded connection with the threaded kit 81, and through the guiding fit between the first slider 11 and the first slide rail 10, the printing platform 2 is driven to perform a stable lifting action.

[0026] The limiting component includes a plurality of groups of pairwise corresponding first through grooves 20 opened in the long axis direction of the printing platform 2. Two second through grooves 21 are correspondingly opened on the left and right at the center of the short axis direction of the printing platform 2. The first through grooves 20 and the second through grooves 21 are both internally provided with limiting members 22.

[0027] During use, multiple groups of first through grooves 20 are pairwise correspondingly arranged in the long axis direction of the printing platform 2 to adapt to the limitation of printing plates 65 with different widths. Two second through grooves 21 are correspondingly opened on the left and right at the center of the short axis direction of the printing platform 2 to adapt to the limitation of printing plates 65 with different lengths. Before printing, place the printing plate 65 at the center of the upper surface of the printing platform 2, and place the limiting members 22 into the two second through grooves 21 and the first through grooves 20 at the corresponding positions to limit the printing plate 65.

[0028] The limiting member 22 includes a limiting plate 23 adapted to the printing plate 65 and a pressing plate 24 adapted to the mounting substrate 3. The pressing plate 24 has an extension portion 25 adapted to the first through groove 20 or the second through groove 21. Two first fixing ears 26 are correspondingly arranged on the outer side surface of the extension portion 25. A sliding rod 27 is formed on the top surface of the pressing plate 24 at the corresponding positions of the two first fixing ears 26. The sliding rod 27 is slidably engaged with the corresponding first fixing ear 26 and a limiting ring 28 is formed on the top surface; a second fixing ear 4 is arranged at the middle position between the two first fixing ears 26 of the extension portion 25. A first screw rod 40 is rotatably arranged on the pressing plate 24 at the corresponding position of the second fixing ear 4. The second fixing ear 4 is provided with a threaded hole 41 adapted to the first screw rod 40. The lower end of the first screw rod 40 penetrates through and extends below the pressing plate 24 and is connected with a first knob 42; the limiting plate 23 is an "L"-shaped structure adapted to the outer edge of the printing plate 65.

[0029] During use, the specific operation of the limiting member 22 is to control the limiting member 22 to move along the first through groove 20 or the second through groove 21 until the limiting plate 23 contacts and abuts against the outer edge of the printing plate 65. At this time, rotate the first knob 42 to control the rotation of the first screw rod 40. Through the threaded connection and cooperation between the first screw rod 40 and the second fixing ear 4 and the sliding guiding between the two sliding rods 27 and the first fixing ears 26, control the limiting plate 23 and the pressing plate 24 to move towards each other until the clamping surface of the limiting plate 23 completely presses the outer edge of the printing plate 65 and the upper surface of the pressing plate 24 completely presses the lower surface of the printing platform 2. At this time, while the position of the limiting member 22 is fixed, the printing plate 65 is limited and fixed.

[0030] Four second screw rods 5 are distributed in a rectangular shape at the four corners of the bottom surface of the printing platform 2. Each mounting substrate 3 is provided with two through holes 30 for the second screw rods 5 to pass through. A spring member 50 is sleeved on the outer circle of the second screw rod 5. The lower end of the second screw rod 5 passes through the through hole 30 and is connected with a second knob 51.

[0031] During use, the printing platform 2 is detachably connected to the two mounting substrates 3. During specific installation, each second screw rod 5 at the four corners of the printing platform 2 is passed through the corresponding through holes 30 preset on the mounting substrate 3, and then the second knob 51 is screwed tightly with the second screw rod 5;

[0032] In the working state, the spring member 50 is sleeved on the outer circle of the second screw rod 5 and the upper and lower ends respectively abut against the printing platform 2 and the mounting substrate 3. During daily use, the printing platform 2 can be leveled by loosening or tightening the second knob 51. When the second knob 51 is loosened, control it to move axially downward along the second screw rod 5. At this time, the printing platform 2 is lifted upward due to the acting force of the spring member 50; on the contrary, when the second knob 51 is tightened, control the second screw rod 5 to move downward along the through hole 30 against the acting force of the spring member 50. At this time, the printing platform 2 descends against the acting force of the spring member 50. The four corners of the printing platform 2 are adjusted respectively by the above leveling method;

[0033] The aperture of the through hole 30 is slightly larger than the outer diameter of the screw rod, so as to avoid jamming between the screw rod and the through hole 30 during the leveling process.

[0034] The extrusion mechanism includes two first driving units 6 arranged on the upper part of the main frame 1. The first driving unit 6 has a y-axis lead screw 60, and the y-axis lead screw 60 is connected with a first positioning block 61. A second driving unit 62 is arranged between the two first positioning blocks 61. The second driving unit 62 has an x-axis lead screw 63, and the x-axis lead screw 63 is connected with an extrusion unit 64.

[0035] Refer to the attached instruction manual Figure 6 In use, the first driving unit 6 includes a fixed base plate 7 connected to the main frame 1, a second slide rail 70 fixedly installed on the upper surface of the fixed base plate 7, and two side plates 71 fixedly installed at the front and rear ends of the second slide rail 70 correspondingly. The y-axis lead screw 60 is rotatably arranged between the two side plates 71. The front end of the y-axis lead screw 60 penetrates through the side plate 71 and is connected with a second motor 72. The first positioning block 61 is in sliding fit with the second slide rail 70, and the first positioning block 61 is formed with a first screw hole 73 adapted to the y-axis lead screw 60. The two second motors 72 are fixedly installed on the inner side surface of the main frame 1. When working, the two second motors 72 are started to drive the two y-axis lead screws 60 to rotate synchronously. The rotation of the two y-axis lead screws 60, through the threaded connection and cooperation between the first screw hole 73 of the first positioning block 61 and the guiding cooperation between the first positioning block 61 and the second slide rail 70, drives the extrusion unit 64 to perform an extrusion action in the y-axis direction;

[0036] The second driving unit 62 includes a connecting plate 74 fixedly installed on the opposite sides of the two first positioning blocks 61 and a third slide rail 75 fixedly installed between the two connecting plates 74. A second positioning block 76 is slidably arranged on the third slide rail 75, and the second positioning block 76 is formed with a second screw hole 77 adapted to the x-axis lead screw 63. The x-axis lead screw 63 is rotatably arranged between the two connecting plates 74. A third motor 78 is fixedly installed on the upper surface of one of the first positioning blocks 61. One end of the x-axis lead screw 63 penetrates through the connecting plate 74 and is drivingly connected with the third motor 78. When working, the third motor 78 is started to drive the x-axis lead screw 63 to rotate. The rotation of the x-axis lead screw 63, through the threaded connection and cooperation between the second screw hole 77 of the second positioning block 76 and the guiding cooperation between the second positioning block 76 and the third slide rail 75, drives the extrusion unit 64 to perform an extrusion action in the x-axis direction.

[0037] All the electrical components appearing in this article are electrically connected to an external main controller and 220V mains electricity, and the main controller can be a conventional known device such as a computer for control.

[0038] It should also be noted that the terms used in the present utility model, such as "front", "rear", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present utility model.

[0039] The above is only the preferred embodiment of the present utility model. The protection scope of the present utility model is not limited to the above embodiments. Any technical solution falling within the concept of the present utility model belongs to the protection scope of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, several improvements and refinements made without departing from the principle of the present utility model should also be regarded as within the protection scope of the present utility model.

Claims

1. A working platform of an FDM printer, comprising a main frame (1) and a printing platform (2) arranged inside the main frame (1), characterized in that: Four first slide rails (10) are arranged in pairs on the left and right sides of the main frame (1). The first slide rails (10) are provided with first sliders (11) in a matching manner, and the four first sliders (11) are distributed in a rectangular shape. Two of the first sliders (11) on the same side are jointly connected to an installation substrate (3). The printing platform (2) is installed between the two installation substrates (3). The printing platform (2) has a limiting component for fixing the printing plate (65). An extrusion mechanism is arranged at the top of the main frame (1) corresponding to the printing platform (2).

2. The working platform of the FDM printer according to claim 1, characterized in that: The limiting component includes a number of pairs of corresponding first through slots (20) opened in the long axis direction of the printing platform (2). Two second through slots (21) are correspondingly opened on the left and right at the center of the short axis direction of the printing platform (2). The first through slots (20) and the second through slots (21) are both internally provided with limiting members (22).

3. The working platform of the FDM printer according to claim 2, characterized in that: The limiting member (22) includes a limiting plate (23) adapted to the printing plate (65) and a pressing plate (24) adapted to the installation substrate (3). The pressing plate (24) has an extension portion (25) adapted to the first through slot (20) or the second through slot (21). Two first fixing ears (26) are correspondingly arranged on the outer side surface of the extension portion (25). A sliding rod (27) is formed on the top surface of the pressing plate (24) corresponding to the two first fixing ears (26). The sliding rod (27) is in sliding fit with the corresponding first fixing ear (26) and a limiting ring (28) is formed on the top surface.

4. The working platform of the FDM printer according to claim 3, characterized in that: A second fixing ear (4) is arranged at the center between the two first fixing ears (26) of the extension portion (25). A first screw rod (40) is rotatably arranged on the pressing plate (24) corresponding to the second fixing ear (4). A threaded hole (41) adapted to the first screw rod (40) is opened in the second fixing ear (4). The lower end of the first screw rod (40) penetrates through and extends below the pressing plate (24) and is connected to a first knob (42).

5. The working platform of the FDM printer according to claim 4, characterized in that: The limiting plate (23) is an "L" - shaped structure adapted to the outer edge of the printing plate (65).

6. The working platform of the FDM printer according to claim 1, characterized in that: Four second screw rods (5) are distributed in a rectangular shape at the four corners of the bottom surface of the printing platform (2). Each installation substrate (3) is provided with two through holes (30) for the second screw rods (5) to pass through. A spring member (50) is sleeved outside the second screw rods (5). The lower end of the second screw rod (5) passes through the through hole (30) and is connected to a second knob (51).

7. The working platform of the FDM printer according to claim 1, characterized in that: The extrusion mechanism includes two first driving units (6) arranged on the upper part of the main frame (1). The first driving unit (6) has a y - axis lead screw (60), and the y - axis lead screw (60) is connected to a first positioning block (61). A second driving unit (62) is arranged between the two first positioning blocks (61). The second driving unit (62) has an x - axis lead screw (63), and the x - axis lead screw (63) is connected to an extrusion unit (64).

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