Platform stripping structure for 3D printer

Abstract

The platform stripping structure for the 3D printer relates to the field of 3D printing equipment and comprises a platform plate, a movable cavity is formed in the platform plate, a plurality of strip openings are formed in the upper surface of the platform plate, the strip openings penetrate through the movable cavity, a plurality of split strips aligned to the strip openings are arranged in the movable cavity, and the split strips are supported by a bearing part applying upward elastic force. The platform plate is provided with a strip opening, the split strip is clamped into the strip opening, a sliding frame horizontally and slidably penetrates through the movable cavity, the bearing part is provided with a guide groove, the height of the bottom edge of the guide groove is increased in the sliding direction of the sliding frame, and the sliding frame is provided with a guide column laterally inserted into the guide groove. The bearing part is driven to drive the split strip to descend, so that the split strip is separated from the model firstly, the adhesion area of the model and the surface of the platform plate is reduced, then the model is separated from the platform plate, the adhesion strength when the model is directly taken down is reduced, and the model is prevented from being damaged.

Description

Technical Field

[0001] The present invention relates to the field of 3D printing equipment, and particularly to a platform material discharging structure for a 3D printer. Background Art

[0002] The printing platform is an important component of 3D printing equipment. The printing material is deposited on the surface of the platform and accumulates layer by layer to form a model. To ensure the stable formation of the model and avoid warping and cracking of the model, there is an adhesion effect between the printing material and the platform.

[0003] The bearing surface of the traditional printing platform is a complete plane, and the printing material adheres tightly to the bearing surface of the platform, resulting in that it is not easy to remove the model with a large contact area from the platform surface. Forcibly separating the model is likely to damage the bottom of the model. Summary of the Invention

[0004] In order to make up for the deficiencies of the existing technology, the purpose of the present invention is to provide a platform material discharging structure for a 3D printer, which is used to solve the problem that the traditional printing platform with a complete plane has a large adhesion area with the model and it is not easy to completely remove the model from the platform surface.

[0005] In order to solve the problems of the existing technology, the technical solution of the present invention is as follows: A platform material discharging structure for a 3D printer includes a platform board. The inside of the platform board has an activity cavity. A plurality of strip openings are arranged on the upper surface of the platform board, and the strip openings penetrate through the activity cavity. A plurality of split strips corresponding to the strip openings are arranged in the activity cavity. The split strips are supported by a bearing member applied with an upward elastic force, so that the split strips are clamped into the strip openings, and a flat surface is formed on the upper surface of the platform board. A carriage is horizontally slidably arranged through the activity cavity. The bearing member has a guide groove, and the bottom height of the guide groove increases along the sliding direction of the carriage. The carriage has a guide post laterally inserted into the guide groove. Pulling the carriage makes the guide post abut against the bottom of the guide groove and move, so as to press down the bearing member to separate the split strips from the strip openings.

[0006] Preferably, the bearing member includes a carrier plate, the carrier plate is vertically elastically slidably connected with the activity cavity, the split strips are fixed on the upper surface of the carrier plate, a channel parallel to the carriage is arranged on the bottom surface of the carrier plate, and the guide groove is arranged on the side surface of the channel.

[0007] Preferably, the bearing member includes two plate seats, the two plate seats are elastically rotatably arranged on both sides of the activity cavity through a torsion spring. The plurality of split strips are divided into two groups, and the two groups of split strips are distributed at intervals and staggered. The two ends of the two groups of split strips are respectively fixed to connect the plate seats, and the other ends of the two groups of split strips are both fixed with end strips. The end strips are parallel to the carriage, and the guide groove is arranged on the surface of the end strip.

[0008] Preferably, the carrier includes a flap, one end of the flap is elastically and rotatably connected to the movable cavity through a torsion spring, the split strip is fixed on the upper surface of the flap, ear plates are arranged to extend downward on both sides of the free end of the flap, and the guide groove is arranged on the surface of the ear plate.

[0009] Preferably, the bottom edge of the guide groove has continuous recesses, so that the bottom of the guide groove is formed in a corrugated shape.

[0010] Preferably, a horizontally arranged portion with uniform height is extended at the low end of the guide groove, and the height of the horizontally arranged portion is adapted to the diameter of the guide post.

[0011] Preferably, the carriage includes two parallel pull rods, the guide posts are fixed to the pull rods, the pull rods horizontally slide through the movable cavity, a handle is fixed to one end of the pull rod, a nut is threadedly connected to the other end of the pull rod, and a spring is arranged between the nut and the platform plate.

[0012] Preferably, the platform plate includes a bottom plate, the movable cavity is arranged on the upper surface of the bottom plate, a panel is covered on the upper surface of the bottom plate, and the strip opening is arranged on the surface of the panel.

[0013] Preferably, the panel and the bottom plate are fixedly connected by screws, the screws penetrate through the bottom plate from the bottom of the bottom plate and are threadedly connected to the panel, and the top ends of the screws do not penetrate through the upper surface of the panel.

[0014] Preferably, the strip openings are arranged at equal intervals, and the distance between adjacent strip openings is the same as the width of the strip openings.

[0015] Compared with the prior art, the advantages of the present invention are as follows: 1. In the present invention, the split strip is supported by the carrier and adapted to the strip opening, so that the top surface of the platform plate forms the flat front surface of the loading model. By driving the carrier to drive the split strip to descend, the split strip is first separated from the model, reducing the adhesion area between the model and the surface of the platform plate, and then the model is separated from the platform plate, reducing the adhesion strength when the model is directly removed and avoiding damaging the model.

[0016] 2. In the present invention, a horizontally arranged portion is extended at the low end of the guide groove, and the guide post is inserted into the horizontally arranged portion to position the height at which the split strip is supported, maintaining the stability of the plate surface structure.

[0017] 3. The bottom edge of the guide groove in the present invention is corrugated. During the process of descending the split strip, the guide post moves along the corrugated bottom of the guide groove, causing the carrier plate to vibrate during the descending process, promoting a more precise separation between the split strip and the bottom of the model and avoiding damage to the bottom of the model. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic top view structure diagram of the whole of the present invention.

[0019] Figure 2Schematic diagram of the overall bottom surface structure of the present invention.

[0020] Figure 3 Exploded view of the whole of the first embodiment of the present invention.

[0021] Figure 4 Schematic diagram of the structure of the first embodiment of the carrier member of the present invention.

[0022] Figure 5 Schematic diagram of the guide groove structure of the present invention.

[0023] Figure 6 Exploded view of the whole of the second embodiment of the present invention.

[0024] Figure 7 Schematic diagram of the structure of the second embodiment of the carrier member of the present invention.

[0025] Figure 8 Exploded view of the whole of the third embodiment of the present invention.

[0026] Figure 9 Schematic diagram of the structure of the third embodiment of the carrier member of the present invention.

[0027] Reference numerals: 1, platform plate; 11, bottom plate; 12, panel; 13, movable cavity; 2, strip opening; 3, split strip; 4, pull rod; 41, guide post; 42, handle; 5, guide groove; 51, horizontal part; 52, recessed part; 6, carrier plate; 61, channel; 7, plate seat; 71, end strip; 8, flap; 81, ear plate. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0029] In the first embodiment, a platform dematerialization structure for a 3D printer has the platform plate 1 as the main body. The supporting components such as the sliding components, driving components, and leveling components supporting the printing platform are arranged at the bottom of the platform plate 1 and are not shown in the figure.

[0030] As Figure 1 , Figure 2 , Figure 3 shown, the platform plate 1 includes a square bottom plate 11. A movable cavity 13 is opened on the upper surface of the bottom plate 11. The panel 12 is covered on the upper surface of the bottom plate 11. The panel 12 has the same contour as the bottom plate 11. At the bottom edge position of the bottom plate 11, screws pass through the bottom plate 11 upward and are threadedly connected to the panel 12 to fix the panel 12 and the bottom plate 11 into one body, and the top ends of the screws do not penetrate the upper surface of the panel 12, so that the upper surface of the panel 12 is relatively flat.

[0031] A number of openings 2 are formed through the surface of the panel 12. The openings 2 communicate with the movable cavity 13. The openings 2 are arranged at equal intervals along the front-back direction of the panel 12, and the distance between adjacent openings 2 is the same as the width of the openings 2.

[0032] As Figure 3 , Figure 4 shown, a carrier is arranged in the movable cavity 13. The carrier includes a carrier plate 6. The carrier plate 6 is vertically slidable in the movable cavity 13. A plurality of springs are uniformly arranged at the bottom of the carrier plate 6 to connect with the bottom of the movable cavity 13. The springs apply an upward elastic force to the carrier plate 6. A number of split strips 3 are fixed on the upper surface of the carrier plate 6. The split strips 3 are aligned with the openings 2. The elastic force of the springs causes the carrier plate 6 to move upward and be flush with the bottom surface of the panel 12. The split strips 3 are inserted into the openings 2 in alignment, so that the upper surface of the platform plate 1 forms a flat surface.

[0033] As Figure 2 , Figure 3 , Figure 4 shown, the carriage includes two parallel pull rods 4. The pull rods 4 slide through from the front side to the rear side of the bottom plate 11, so that the pull rods 4 penetrate the movable cavity 13. A handle 42 is fixed at the front end of the pull rod 4, and a groove for accommodating the handle is formed at the front side of the bottom plate 11. The rear end of the pull rod 4 has a threaded portion, and a nut is threadedly connected to the outside of the threaded portion. A spring is arranged between the nut and the platform plate 1. The spring applies a backward elastic force to the pull rod 4. By rotating the nut, the sliding stroke of the pull rod 4 and the magnitude of the reset elastic force can be adjusted.

[0034] The bottom surface of the carrier plate 6 has a channel 61 that penetrates the front and rear edges of the carrier plate 6. The two side walls of the channel 61 are vertical surfaces. Guide grooves 5 are formed on the two side walls of the channel 61. The bottom height of the guide grooves 5 gradually increases from the rear to the front. The pull rod 4 passes through the channel 61 in parallel. A laterally extending guide post 41 is fixed to the pull rod 4. The guide post 41 is slidably inserted into the guide grooves 5.

[0035] The elastic force of the spring causes the carrier plate 6 to move upward to support the split strips 3. The split strips 3 are inserted into the openings 2 so that the upper surface of the panel 12 is a flat surface. A printed model is made on the upper surface of the panel 12. The bottom of the model adheres to the upper surface of the panel 12. When the formed model needs to be removed, hold the handle 42 and pull the pull rod 4 forward against the elastic force, so that the guide post 41 slides forward in the guide groove 5. By the guide post 41 abutting against the bottom edge of the guide groove 5, a downward thrust is generated on the carrier plate 6, causing the carrier plate 6 to drive the split strips 3 to descend and separate from the openings 2. The descending height is 2 - 4 mm. When the split strips 3 descend, they first separate from the bottom of the model, reducing the adhesion area between the model and the upper surface of the panel 12, and then the model is separated and removed from the upper surface of the panel 12. Release the handle 42, and under the action of the elastic force, the pull rod 4 resets, and the guide post 41 moves back to the lowest end of the guide groove 5. Similarly, under the action of the elastic force, the carrier plate 6 resets and rises, causing the split strips 3 to be inserted into the openings 2.

[0036] AsFigure 5 As shown, a horizontal part 51 with uniform height is provided at the low end of the guide groove 5. The height of the horizontal part 51 is adapted to the diameter of the guide post 41. When the split strip 3 is inserted into the strip opening 2, the guide post 41 is located at the low end of the guide groove 5 and is inserted into the horizontal part 51 under the action of elastic force, so as to lock the heights of the carrier plate 6 and the split strip 3, making the flat surface formed by the split strip 3 and the panel 12 have higher stability.

[0037] As Figure 5 shown, the bottom edge of the guide groove 5 has continuous concave parts 52, making the bottom of the guide groove 5 form a corrugated shape. During the process of pulling down the split strip 3, the guide post 41 moves along the corrugated bottom of the guide groove 5, causing the carrier plate 6 to vibrate during the descending process, promoting a more delicate separation of the split strip 3 from the bottom of the model and avoiding damage to the bottom of the model.

[0038] Embodiment 2 is different from Embodiment 1 in the structure of the carrier; As Figure 6 and Figure 7 shown, the carrier includes two plate seats 7. The two plate seats 7 are symmetrically and elastically rotatably arranged on the left and right sides of the movable cavity 13 through torsion springs, dividing several split strips 3 into two groups. The two groups of split strips 3 are spaced and staggered, and the two groups of split strips 3 are not aligned in the left-right direction. The two ends of the two groups of split strips 3 are respectively fixed flat on the upper surfaces of the two plate seats 7. End strips 71 are fixed on the bottom surfaces of the other ends of the two groups of split strips 3. The end strips 71 extend forward and backward. The guide groove 5 is arranged on the surface of the end strip 71. The pull rod 4 passes through from below the split strip 3, and the guide post 41 is laterally inserted into the guide groove 5.

[0039] The two plate seats 7 provide upward torsional elastic force to make the split strip 3 be inserted into the strip opening 2 in place. When removing the model from the surface of the panel 12, the pull rod 4 is pulled to move. By the movement of the guide post 41 to contact the bottom edge of the guide groove 5, the end strip 71 drives the free end of the split strip 3 to descend. The two groups of split strips 3 swing downward and rotate around the plate seats 7 to separate from the strip opening 2, making the split strip 3 separate from the bottom of the model first, reducing the adhesion area between the model and the upper surface of the panel 12, and then separating and removing the model from the upper surface of the panel 12.

[0040] Embodiment 3 is different from the above embodiments in the structure of the carrier; As Figure 8 and Figure 9 shown, the carrier includes a flap 8. The rear end of the flap 8 is elastically rotatably connected to the rear side of the movable cavity 13 through a torsion spring. In this embodiment, the strip opening 2 and the split strip 3 are arranged left and right. The split strip 3 is fixed on the upper surface of the flap 8. Earmuffs 81 are downwardly extended on both sides of the free end of the flap 8. The guide groove 5 is arranged on the surface of the earmuff 81.

[0041] The flap 8 provides an upward torsional elastic force so that the split strip 3 can be inserted into the strip opening 2. When the model is removed from the surface of the panel 12, the pull rod 4 is pulled out to move, and the guide column 41 moves to contact the bottom edge of the guide groove 5, so that the flap 8 drives the free end of the split strip 3 to descend, so that the split strip 3 is first separated from the bottom of the model, reducing the adhesion area between the model and the upper surface of the panel 12, and then the model is separated and removed from the upper surface of the panel 12.

[0042] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A platform material discharging structure for a 3D printer, comprising: Platform plate (1), the interior of the platform plate (1) has an activity cavity (13), characterized in that a number of slots (2) are arranged and opened on the upper surface of the platform plate (1), the slots (2) penetrate through the activity cavity (13), a number of split strips (3) corresponding to the slots (2) are arranged in the activity cavity (13), the split strips (3) are supported by a bearing member applied with an upward elastic force, so that the split strips (3) are clamped into the slots (2), and a flat surface is formed on the upper surface of the platform plate (1). A carriage is horizontally slidably arranged through the activity cavity (13). The bearing member has a guide groove (5), the bottom height of the guide groove (5) increases along the sliding direction of the carriage, the carriage has a guide post (41) laterally inserted into the guide groove (5), and the carriage is pulled to make the guide post (41) abut against the bottom of the guide groove (5) and move, so as to press down the bearing member to separate the split strip (3) from the slot (2).

2. The platform unloading structure for a 3D printer according to claim 1, wherein, The bearing member includes a carrier plate (6), the carrier plate (6) is vertically elastically slidably connected with the activity cavity (13), the split strip (3) is fixed on the upper surface of the carrier plate (6), a channel (61) parallel to the carriage is arranged on the bottom surface of the carrier plate (6), and the guide groove (5) is arranged on the side surface of the channel (61).

3. The platform stripping structure for a 3D printer according to claim 1, wherein, The bearing member includes two seat plates (7), the two seat plates (7) are elastically rotatably arranged on both sides of the activity cavity (13) through a torsion spring, a number of split strips (3) are divided into two groups, the two groups of split strips (3) are spaced and staggeredly distributed, the two ends of the two groups of split strips (3) are respectively fixedly connected to the seat plates (7), and the other ends of the two groups of split strips (3) are both fixedly connected with end strips (71), the end strips (71) are parallel to the carriage, and the guide groove (5) is arranged on the surface of the end strip (71).

4. The platform material discharging structure for a 3D printer according to claim 1, characterized in that, The bearing member includes a flap (8), one end of the flap (8) is elastically rotatably connected with the activity cavity (13) through a torsion spring, the split strip (3) is fixed on the upper surface of the flap (8), and ear plates (81) are downwardly extended on both sides of the free end of the flap (8), and the guide groove (5) is arranged on the surface of the ear plate (81).

5. The platform unloading structure for a 3D printer according to claim 1, characterized in that, The bottom of the guide groove (5) has continuous recessed portions (52), so that the bottom of the guide groove (5) is formed in a corrugated shape.

6. The platform unloading structure for a 3D printer according to claim 1, characterized in that, A horizontally arranged portion (51) with uniform height is extended at the low end of the guide groove (5), and the height of the horizontally arranged portion (51) is adapted to the diameter of the guide post (41).

7. The platform material discharging structure for a 3D printer according to claim 1, characterized in that, The carriage includes two parallel pull rods (4), the guide post (41) is fixed to the pull rod (4), the pull rod (4) is horizontally slidably arranged through the activity cavity (13), a handle (42) is fixed to one end of the pull rod (4), and a nut is threadedly connected to the other end of the pull rod (4), and a spring is arranged between the nut and the platform plate (1).

8. The platform unloading structure for a 3D printer according to claim 1, characterized in that, The platform plate (1) includes a bottom plate (11), the activity cavity (13) is arranged on the upper surface of the bottom plate (11), a panel (12) is covered on the upper surface of the bottom plate (11), and the slot (2) is arranged on the surface of the panel (12).

9. The platform material discharging structure for a 3D printer according to claim 8, characterized in that, The panel (12) and the bottom plate (11) are fixedly connected by screws, the screws penetrate through the bottom plate (11) from the bottom of the bottom plate (11) and are threadedly connected to the panel (12), and the top ends of the screws do not penetrate through the upper surface of the panel (12).

10. The platform unloading structure for a 3D printer according to claim 1, characterized in that, The Tiaokou points (2) are arranged at equal intervals, and the distance between adjacent Tiaokou points (2) is the same as the width of the Tiaokou points (2).

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