3D printer and discharging device of printing platform

Abstract

The utility model discloses a blanking device applied to a printing platform in a 3D printer, which comprises a push rod assembly driven by a motor to reciprocate along a screw rod, the push rod assembly comprises a driving frame, and two sides of the driving frame are respectively and fixedly provided with a mounting seat parallel to the screw rod. Two non-return pieces which are opposite to each other are respectively mounted in the length direction of the mounting seats, are pressed by the printing platform and alternately rotate towards the discharging direction to support the printing platform, and the non-return pieces are driven by torsion springs to reset from the horizontal position to the vertical position; the utility model further discloses a 3D printer. The 3D printer sequentially comprises a feeding bin, a jacking rod and a discharging device used for the printing platform in the moving direction of the printing platform. Feeding and discharging of the printing platform are connected through the jacking rods, and the printing efficiency is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to 3D printing equipment field especially is applied to the unloading device of printing platform in 3D printer. BACKGROUND

[0002] 3D printer is also called three-dimensional printer or stereoscopic printer, and is a kind of process equipment of rapid prototyping.3D printing technology that 3D printer can adopt at present is fused deposition modeling, abbreviated as FDM, and is the technology of constructing three-dimensional object by using powder-like metal or plastic and other materials through layer-by-layer printing based on digital model.In specific implementation, three-dimensional printer using FDM technology is provided with hot melt filament material to three-dimensional printer hot end by feeding mechanism, and hot melt filament material is heated to molten state in hot end.Hot end can extrude material in molten state on printing plate while moving according to the printing path of three-dimensional printer, to print three-dimensional object in a layer-by-layer manner.

[0003] CN2024116128263 discloses a kind of 3D printing equipment with automatic replacement substrate function, and the present application is by being provided with substrate storage cavity, substrate material receiving cavity, screw drive, first mobile clamping piece and second mobile clamping piece in equipment main body.In order to adapt the moving distance of printing platform to be equal to the length of screw rod, the displacement device for printing platform occupies large space, and increases the occupied space of printing equipment. SUMMARY

[0004] The utility model aims at providing a kind of unloading device applied to the printing platform in 3D printer, and the utility model is by the reciprocating movement of screw rod cooperation along the two check valves of printing platform unloading route setting alternately push printing platform in effective moving space to farther unloading position.

[0005] To solve this technical problem, the technical scheme of the utility model is: a kind of unloading device applied to the printing platform in 3D printer, including by motor driving reciprocating movement along screw rod push rod assembly, push rod assembly includes drive frame, two sides of drive frame are respectively fixed with the mounting seat of being arranged in parallel with screw rod, two check valves are respectively installed along the length direction of mounting seat and alternately rotate towards unloading direction to form the support printing platform under the pressure of printing platform, the check valve is reset from horizontal position to vertical position under the drive of torsion spring.

[0006] Further improvement, the lead screw and the driving frame are surrounded by the base and the back plate; the mounting seat and the check piece protrude from the mounting seat and the check piece; the base is further provided with a raised structure between the two mounting seats for supporting the printing platform, and the surface of the raised structure is provided with a wear-resistant layer. The base and the back plate surround the lead screw and the driving frame, and cooperate with the raised structure and the wear-resistant layer to ensure stable displacement of the printing platform that has completed printing.

[0007] Further improvement, the base is provided with two guide notches for reciprocating movement of the mounting seat. The mounting seat and the base are arranged in a nested structure, the overall structure is more compact, and the raised structure is used to realize stable feeding of the printing platform.

[0008] Further improvement, the mounting seat comprises a connecting part for fixing with the driving frame, a supporting and pushing part for mounting the two check pieces, the supporting and pushing part is provided with two connecting ears for hinging the check pieces, and the supporting and pushing part is further provided with a limiting groove for accommodating the check pieces. In the utility model, the connecting ears and the limiting groove are used to limit the rotation of the check pieces in the feeding direction when the printing platform is subjected to the downward pressure, and the two check pieces are used to realize the pushing of the printing platform in turn by alternating from the horizontal position to the vertical position.

[0009] Further improvement, the motor is connected with the lead screw through a shaft coupling, and the driving frame is installed on the lead screw through brass screws.

[0010] Further improvement, a limit switch is further arranged, and the limit switch is embedded in the base. In the utility model, when the printing platform is lowered to trigger the limit switch, the printing platform has been lifted by the five jacking rods in the 3D printing equipment, the printing platform is smoothly pushed out of the hot bed by the feeding bin, the synchronous displacement and connection of the printing platform that has not been subjected to 3D printing and the printing platform that has completed 3D printing are effectively realized to complete feeding and discharging, and the continuous and stable 3D printing is ensured.

[0011] Another purpose of the utility model is to provide a 3D printer, and the feeding and discharging of the printing platform are connected by the jacking rod to effectively improve the printing efficiency.

[0012] To solve the technical problem, the technical scheme of the utility model is as follows: a 3D printer comprises the displacement device.

[0013] Further improvement, the feeding bin, the jacking rod and the discharging device for the printing platform are sequentially arranged along the moving direction of the printing platform.

[0014] By adopting the above technical scheme, the utility model has the advantages of:

[0015] With the automatic realization of the unprinted platform in the feeding bin, the completed 3D printing platform supported by the jacking rod is pushed to the protruding structure, the two check valves close to the jacking rod are in the vertical state, the two check valves close to the discharging area are pressed by the printing platform and are rotated relative to the mounting seat to be in the horizontal position, the motor drives the driving frame to push the printing platform to the discharging area through the two check valves in the vertical position for the first time, in the process, the printing platform moves towards the discharging area, when the driving frame moves a fixed stroke along the screw towards the discharging area, the driving frame is reversely rotated to return to the initial position under the drive of the motor, at this time, the two check valves away from the jacking rod are separated from below the printing platform, the two check valves lose the pressure and reset to the vertical position, at this time, the motor drives the driving frame to move towards the printing platform to be discharged again, the two check valves away from the jacking rod push the printing platform to the farthest position, therefore, the printing platform completed printing is effectively pushed to a farther discharging position in the limited moving space, and the automatic feeding and discharging of the printing platform is effectively realized in cooperation with the jacking rod and the feeding bin. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a perspective view of a discharging device for a printing platform applied to a 3D printer, wherein the push rod assembly is in the initial position of pushing the printing platform;

[0017] Figure 2 It is a perspective view of a discharging device for a printing platform applied to a 3D printer;

[0018] Figure 3 It is a structure schematic view of the cooperation of the driving motor and the push rod assembly of the discharging device for a printing platform applied to a 3D printer;

[0019] Figure 4 It is a bottom view of the discharging device for a printing platform applied to a 3D printer, wherein the back plate is hidden;

[0020] Figure 5 It is a 3D printer;

[0021] Figure 6 It is a perspective view of the hidden shell of the discharging bin, wherein the push rod assembly is in the initial position of pushing the printing platform;

[0022] Figure 7 It is a perspective view of the fixing piece for stacking the printing platform feeding bin;

[0023] Figure 8 It is a perspective view of the printing platform feeding and shifting device;

[0024] Figure 9It is the explosion view of the upper feeding push rod assembly in the utility model;

[0025] Figure 10 It is the cooperation schematic view of the upper feeding push rod assembly and the upper feeding screw rod in the utility model.

[0026] In the figure,

[0027] The printing platform 100; the motor 1; the screw rod 2; the push rod assembly 3; the driving frame 31; the mounting seat 32; the connecting part 321; the supporting and pushing part 322; the limiting groove 323; the check piece 33; the torsional spring 34; the base 4; the convex structure 41; the wear-resistant layer 411; the guide notch 42; the bottom plate 5; the shaft coupling 6; the limiting switch 7; the jacking rod 8; the upper feeding bin 9; the fixing piece 11; the upper feeding motor 101; the upper feeding screw rod 103; the upper feeding push rod assembly 14; the structural frame 141; the upper feeding mounting seat 142; the upper feeding check piece 143; the second torsional spring 144; the auxiliary supporting and slow descending assembly 15; the auxiliary supporting rod 151; the connecting part 511; the connecting claw 512; the roller 152; the first torsional spring 153; the turnover piece 16; the clasp spring 61; the closed loop synchronous belt 17. DETAILED DESCRIPTION

[0028] In order to further explain the technical scheme of the utility model, the utility model will be described in detail through specific embodiments.

[0029] The embodiment discloses a displacement device applied to a printing platform 100 of a 3D printer, as shown in the figure, Figures 1 to 5 The push rod assembly 3 includes the driving frame 31, and two mounting seats 32 parallel to the screw rod 2 are fixed on the two sides of the driving frame 31; two check pieces 33 are installed along the length direction of the mounting seat 32 and are alternately rotated towards the discharging direction to form the support for the printing platform 100 under the pressure of the printing platform 100; and the check piece 33 is reset from the horizontal position to the vertical position under the drive of the torsional spring 25.

[0030] In the embodiment, the screw rod 2 and the driving frame 31 are surrounded by the base 4 and the back plate 5; the mounting seat 32 and the check piece 33 protrude from the mounting seat 32 and the check piece 33; and the base 4 is further provided with a convex structure 41 between the two mounting seats 32 for supporting the printing platform 100, and the surface of the convex structure 41 is provided with a wear-resistant layer 411. In the embodiment, the screw rod 2 and the driving frame 31 are surrounded by the base 4 and the back plate 5, and the completed printing platform 100 is stably displaced by cooperating with the intermediate convex structure 41 and the wear-resistant layer 411.

[0031] The base 4 is provided with two guide notches 42 for reciprocating movement of the mounting seat 32. The mounting seat 32 and the base 4 are arranged in a nested structure in this embodiment, and the overall structure is more compact. In combination with the convex structure 41, the stable unloading of the printing platform 100 is realized.

[0032] The mounting seat 32 includes a connecting part 321 for fixing with the driving frame 31, a support pushing part 322 for mounting two check members 33, the support pushing part 322 is provided with two connecting ears for hinging the check members 33, and the support pushing part 322 is further provided with a limiting groove 323 for accommodating the check members 33. In this embodiment, the connecting ears and the limiting groove 323 are combined to limit the check members 33 to rotate towards the unloading direction under the action of the downward pressure of the printing platform 100, and the two check members 33 are alternately reset from the horizontal position to the vertical position to realize the pushing of the printing platform 100 in turn.

[0033] The motor 1 is connected with the lead screw 2 through the shaft coupling 6, and the driving frame 31 is mounted on the lead screw 2 through brass screws.

[0034] A limit switch 7 is further arranged in this embodiment, and the limit switch 7 is embedded in the base 4. When the printing platform 100 is lowered to trigger the limit switch 7, the printing platform 100 is lifted by the five jacking rods 8 in the 3D printing equipment, and the printing platform 100 is smoothly pushed out of the printing platform 100 on the hot bed, so that the unloading of the printing platform 100 which has not been 3D printed is synchronized with the loading of the printing platform 100 which has been 3D printed, and the continuous and stable 3D printing is ensured.

[0035] Another object of this embodiment is to provide a 3D printer. The loading and unloading of the printing platform 100 are connected by the jacking rods 8, and the printing efficiency is effectively improved.

[0036] This embodiment further discloses a 3D printer, which comprises the shifting device.

[0037] The moving device for unloading the printing platform 100 is sequentially arranged along the moving direction of the printing platform 100.

[0038] The specific working process of this embodiment is as follows:

[0039] In this embodiment, the reciprocating movement of the lead screw 2, in conjunction with two check valves 33 arranged along the material feeding path of the printing platform 100, alternately pushes the printing platform 100 to a further feeding position within the effective movement space. As the unprinted platform 100 is automatically shifted and fed into the feeding bin 9, the 3D-printed printing platform 100, supported by the lifting rod 8, is pushed to the protruding structure 41. The two check valves 33 near the lifting rod 8 are in a vertical state, while the two check valves 33 near the feeding area are pressed against the printing platform 100 and rotate relative to the mounting base 32 to a horizontal position. The motor 1 drives the drive frame 31 to push the printing platform 100 to the feeding area for the first time through the two check valves 33 in the vertical position. During this process, the printing platform 100 moves towards... When the unloading area moves, and the drive frame 31 moves a fixed stroke along the lead screw 2 towards the unloading area, the drive frame 31 rotates in the opposite direction under the drive of the motor 1 to return to the initial position. At this time, the two check valves 33, which are relatively far away from the lifting rod 8, disengage from below the printing platform 100. The two check valves 33, which have lost pressure, return to the vertical position. At this time, the motor 1 drives the drive frame 31 to move towards the printing platform 100 to be unloaded again. The two check valves 33, which are relatively far away from the lifting rod 8, push the printing platform 100 to the farthest position. Therefore, this embodiment effectively pushes the printing platform 100, which has completed printing, to a farther unloading position within a limited movement space. In addition, the automatic loading and unloading of the printing platform 100 is effectively realized in conjunction with the lifting rod 8 and the loading bin 9.

[0040] In this embodiment, multiple printing platforms 100 are stacked in the feeding hopper 9, such as... Figures 6 to 10 As shown, the device includes a fixing member 11 that surrounds and positions a multi-sheet stacked printing platform 100, and a feeding pusher assembly 104 that is driven by a feeding motor 102 to reciprocate along the feeding lead screw 103. The feeding pusher assembly 104 includes a structural frame 141 for threaded connection to the feeding lead screw 103. Two mounting seats 142 perpendicular to the structural frame 141 are symmetrically arranged on both sides of the structural frame 141 facing the fixing member 11. Each mounting seat 142 is provided with a check member 143 that rotates relative to the mounting seat 142 to form a telescoping mechanism. An auxiliary support and slow-descent assembly 15 that rotates relative to the mounting seat 142 is installed through the middle of the mounting seat 142.

[0041] In this embodiment, the auxiliary support descent assembly 15 includes an auxiliary support rod 151 that rotates relative to the mounting base 142, and rollers 152 are respectively installed at both ends of the auxiliary support rod 151; the auxiliary support rod 151 is connected to the mounting base 142 through a connecting pin and a first torsion spring 153.

[0042] The mounting base 142 of the feeding push rod assembly 104 is further provided with an auxiliary support and slow descent assembly 15. During the pushing of the lowermost printing platform 100, the rollers 152 on the upper and lower sides of the auxiliary support and slow descent assembly 15 are respectively relative to the stacked printing platform 100 and the support plane where the auxiliary support and slow descent assembly 15 falls from the lower side, thereby ensuring the stable falling of the stacked printing platform 100.

[0043] In the embodiment, the check piece 143 is connected to the mounting base 142 through a pin and a second torsional spring 144. In the embodiment, the first torsional spring 153 is arranged to drive the auxiliary support rod 151 to be lifted to the initial position.

[0044] In the embodiment, the auxiliary support rod 151 includes a connecting part 511 and a connecting claw 512 for mounting the roller 152, wherein the connecting claw 512 on the upper side is longer than the connecting claw 512 on the lower side. In the embodiment, the length difference of the auxiliary support rod 151 is utilized to realize the relative rotation of the auxiliary support rod 151 relative to the mounting base 142 and the downward movement of the auxiliary support rod 151 to the support plane where the roller 152 on the lower side is located in the auxiliary support and slow descent assembly 15, thereby forming slow descent support for the stacked printing platform 100.

[0045] In the embodiment, the fixing part 11 is provided with a turnover part 16 for blocking the printing platform 100 inside the fixing part 11. The turnover part 16 is mounted in the fixing part 11 through a snap spring 161 and a pin.

[0046] The turnover part 16 is turned over in the direction of the heat bed along with the pushing of the printing platform 100. After the printing platform 100 is completely moved out of the fixing part 11, the check piece 143 is retreated to the initial position behind the stacked printing platform 100 along with the feeding push rod assembly 104. The turnover part 16 is reset to block the printing platform 100 under the drive of the snap spring 161, thereby preventing the printing platform 100 from sliding out during the shaking process. When a pushing force is applied to the printing platform 100, the turnover part 16 assembly is lifted to realize the displacement of the printing platform 100.

[0047] In the embodiment, the structural frame 141 is reciprocally moved along the feeding screw rod 103 through a brass nut 411. The feeding motor 102 drives the feeding screw rod 103 to rotate through a closed loop synchronous belt 7. In the embodiment, the check piece 143 is a continuous shell structure with a hollow structure. The check piece 143 has a curved surface structure for contacting the falling printing platform 100.

[0048] In the embodiment, the curved surface structure includes a convex part 431 of the check piece 143 extending out of the mounting base 142 when the check piece 143 is rotated from the vertical position to the horizontal position and a support part 432 rotating out of the mounting base 142.

[0049] The specific working process of the embodiment is as follows:

[0050] The position of the feeding push rod assembly 104 and the fixing member 11 on both sides of the printing platform 100 is defined as the initial position of the feeding push rod assembly 104. The feeding motor 102 rotates in the forward direction to drive the feeding push rod assembly 104 to push the lowermost printing platform 100, which is pressed by the adjacent printing platform 100 above and is limited in the structure of the mounting seat 142 by the support part 432. The check member 143 rotates from the vertical position to the horizontal position to push the lowermost printing platform 100;

[0051] At this time, the rollers 152 of the auxiliary support and slow descent assembly 15 are in contact with the stacked printing platforms 100 and the support plane below them, respectively, to form mutual support and relative displacement between the stacked printing platforms 100 until the part protruding from the mounting seat 142 and extending below the fixing member 11 pushes the printing platform 100 out;

[0052] Subsequently, the feeding motor 102 reverses to drive the feeding push rod assembly 104 to drive the check member 143 and the rollers 152 of the auxiliary support and slow descent assembly 15 to move out from below the stacked printing platforms 100 to the initial position. The feeding push rod assembly 104 is separated from the stacked printing platforms 100, and the check member 143 loses the pressure of the stacked printing platforms 100 and recovers from the horizontal position to the vertical position under the drive of the torsional spring 53. Thus, the reciprocating displacement of the printing platform 100 is realized.

[0053] In the embodiment, the first torsional spring 153 has a wire diameter of 0.3 mm. The first torsional spring 153 can pop up the check member and will not lift the printing platform during the back-off process due to too much force.

[0054] The embodiment includes a fixing part 11 surrounding a plurality of positioned upper and lower stacked printing platforms 100, and a feeding push rod assembly 104 driven by a feeding motor 102 to move along a feeding lead screw 103; the feeding push rod assembly 104 is driven by the feeding motor 102 to move along the feeding lead screw 103 in the length of the printing platform 100 to push the printing platform 100 out of the fixing part 11 to realize the movement of the printing platform 100 out of the fixing part 11; after the lowermost printing platform 100 is pushed out, the upper adjacent printing platform 100 falls to the feeding push rod assembly 104, the stacked printing platform 100 moves downward to apply pressure to the check valve 143, the check valve 143 rotates relative to the mounting seat 142 to the pushed-out lowermost printing platform 100 to extend from the mounting seat 142 to push the printing platform 100 horizontally out of the fixing part 11, and the length change of the printing platform 100 caused by the rotation of the check valve 143 completely pushes the printing platform 100 out of the fixing part 11; as the lowermost printing platform 100 is pushed out by the feeding push rod assembly 104, the stacked printing platform 100 moves downward to assist the support and slow descent assembly 15 to effectively relieve the noise and vibration caused by the falling of the PEI; through the embodiment, the printing platform 100 such as the PEI plate can be continuously pushed out one by one, as the lowermost PEI plate is pushed out, the upper PEI plate falls to realize the automatic displacement and feeding of the printing platform 100, and the printing efficiency is effectively improved. The embodiment is accompanied by the reciprocating movement of the feeding push rod assembly 104 driven by the feeding motor 102, the telescopic check valve 143 cooperates with the support and slow descent assembly to effectively realize the continuous feeding of the printing platform 100.

Claims

1. A feeding device for the printing platform in a 3D printer, characterized in that: The device includes a push rod assembly that is driven by a motor to reciprocate along a lead screw. The push rod assembly includes a drive frame, and a mounting seat that is parallel to the lead screw is fixed on both sides of the drive frame. Two opposing mounting seats are installed along the length of the mounting seats and rotate alternately in the feeding direction when pressed down by the printing platform to form a check valve that supports the printing platform. The check valve is reset from a horizontal position to a vertical position under the drive of a torsion spring.

2. The feeding device for a printing platform in a 3D printer as described in claim 1, characterized in that: The lead screw and drive frame surround the base and back plate; the mounting base and check valve protrude from the mounting base and check valve; the base is also provided with a protruding structure for supporting the printing platform between the two mounting bases, and the surface of the protruding structure is provided with a wear-resistant layer.

3. The feeding device for the printing platform in a 3D printer as described in claim 2, characterized in that: The base is provided with two guide notches for the reciprocating movement of the mounting seat.

4. The feeding device for a printing platform in a 3D printer as described in claim 1, characterized in that: The mounting base includes a connecting portion for fixing to the drive frame, a support and pushing portion for mounting two check valves, the support and pushing portion having two connecting ears for hinged check valves, and a limiting groove for accommodating check valves.

5. The feeding device for a printing platform in a 3D printer as described in claim 1, characterized in that: The motor is connected to the lead screw via a coupling, and the drive frame is mounted to the lead screw via brass screws.

6. The feeding device for a printing platform in a 3D printer as described in claim 1, characterized in that: A limit switch is also provided, which is embedded in the base.

7. A 3D printer, characterized in that: Includes the feeding device as described in any one of claims 1 to 6.

8. The 3D printer according to claim 7, characterized in that: Along the direction of movement of the printing platform, there are, in sequence, a feeding bin, a lifting rod, and a feeding device for the printing platform.

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