Automatic material supplementing and powder spreading mechanism of SLS printer

Abstract

The utility model discloses an automatic material supplementing and powder spreading mechanism of an SLS printer, which belongs to the technical field of SLS printers and comprises a frame shell, a double-rod reciprocating translation mechanism is arranged in the frame shell, and sliding openings are formed in the upper sides of the two transverse straight ends of the frame shell. The two ends of the double-rod reciprocating translation mechanism penetrate through the two sliding openings correspondingly and are fixedly connected with a powder containing groove box, the bottom of the powder containing groove box communicates with a powder laying opening, a discharging mechanism is arranged in the powder laying opening, and the double-rod reciprocating translation mechanism comprises a stepping motor fixed to one side of the frame shell. According to the SLS printing powder spreading device, printing powder in the powder spreading opening can be stably discharged through the discharging mechanism, the uniformity of material spreading is improved, the double-rod reciprocating translation mechanism can drive the powder containing groove box to do reciprocating translation, the uniformity of material spreading during SLS printing is achieved, the structural stability is high, the effective distance of the displacement stroke is long, and the working effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of SLS printers, in particular to an automatic material replenishment and powder spreading mechanism for an SLS printer. Background Art

[0002] Selective laser sintering (SLS for short) is a widely used rapid prototyping technology. It uses solid powder material as raw material and uses laser to scan the cross-section of three-dimensional entities layer by layer to complete prototype manufacturing. It is not limited by the complexity of the part shape and does not require any tooling and molds. It has a wide range of applications. During the working process of the SLS 3D printer, the raw material powder needs to be evenly laid on the printing platform and then selectively sintered using a laser device.

[0003] In the Chinese patented automatic material replenishment and powder spreading mechanism of the SLS printer (patent number: CN206747591U), the device includes a workbench, a support table, a powder box, a powder adding box, a first powder feeding channel, a second powder feeding channel, a first powder spreading roller and a second powder spreading roller; the support table is arranged above the workbench and a gap is formed between the support table and the workbench, the powder adding box is fixed on the support table, an electric valve is arranged at the outlet of the powder adding box, a baffle matched with the powder adding box is arranged on the upper surface of the workbench, a first pressure sensor is arranged on the side of the baffle facing the powder box, a second pressure sensor is arranged between the powder box and the first powder feeding channel, and a controller electrically connected to the first pressure sensor, the second pressure sensor and the electric valve is also arranged on the support table. The device makes the raw material powder spread evenly and realizes the function of automatic material replenishment. However, the device drives the translational displacement of the powder box by a piston rod, has poor working stability, limited displacement distance, and the powder spreading uniformity effect of the device is general, which affects the SLS printing processing quality. Utility Model Content

[0004] The utility model aims to provide an automatic material replenishment and powder spreading mechanism for an SLS printer to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an automatic material replenishment and powder spreading mechanism for an SLS printer, comprising a frame shell, a double-rod reciprocating translation mechanism is arranged in the frame shell, and sliding openings are opened on the upper sides of the two horizontal and vertical ends of the frame shell, and the two ends of the double-rod reciprocating translation mechanism pass through the two sliding openings respectively and are fixedly connected to a powder loading slot box, the bottom of the powder loading slot box is connected to a powder spreading opening, and a material discharge mechanism is arranged in the powder spreading opening;

[0006] The double-rod reciprocating translation mechanism includes a stepper motor fixed on one side of a frame shell, a main shaft end of the stepper motor extends through the vertical end of the frame shell and is fixedly connected to a rotating rod, and two first transmission wheels are fixedly connected to the rotating rod, and the inner walls of the two vertical ends of the frame shell are rotatably connected to the second transmission wheels through a rotating shaft, and the two first transmission wheels are connected to the two second transmission wheels one by one through a transmission belt, and two symmetrically arranged L-shaped rods are fixedly connected to the upper sides of the two transmission belts, and the two L-shaped rods respectively pass through two sliding openings and are fixedly connected to the powder loading trough box.

[0007] As a further solution of the utility model: wherein, the unloading mechanism includes a servo motor fixed at one end of the powder spreading port, the main shaft end of the servo motor extends through the powder spreading port and is fixedly connected to the first unloading roller, the inner wall of the powder spreading port is rotatably connected to the second unloading roller through the first bearing seat, one end of the first unloading roller and the second unloading roller are fixedly connected to a rotating pin, and one end of the two rotating pins extends through the outer wall of the powder spreading port and is fixedly connected to two meshing gears.

[0008] As a further solution of the utility model: wherein, two inclined and symmetrically arranged guide plates are fixedly connected to the inner walls on both sides of the powder spreading opening above the first unloading roller and the second unloading roller.

[0009] As a further solution of the utility model: wherein, one side of the powder spreading port is fixedly connected with a cover shell, and the two gears are both located in the cover shell.

[0010] As a further solution of the utility model: wherein, an inner wall of one side of the frame shell is rotatably connected to one end of the rotating rod through a second bearing seat.

[0011] As a further solution of the utility model: wherein, a PLC controller is fixedly connected to one side of the frame shell, and one end of the double-rod reciprocating translation mechanism and the unloading mechanism are electrically connected to the PLC controller respectively.

[0012] As a further solution of the utility model: wherein, four symmetrically arranged mounting plates are fixedly connected to the four corners on both sides of the frame shell.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The automatic feeding and powder spreading mechanism of the SLS printer is provided with a feeding mechanism, and the servo motor is started to work, so as to drive the first feeding roller to rotate. Since the two gears are meshed and connected, the two rotating pins are driven to rotate at the same time, and the first feeding roller and the second feeding roller are driven to rotate towards each other, so that the printing powder falling into the powder spreading port can be stably fed, and the uniformity of the spreading is improved.

[0015] 2. The automatic material replenishment and powder spreading mechanism of the SLS printer is configured with a double-rod reciprocating translation mechanism, which starts the stepper motor and drives the two first transmission wheels on the rotating rod to rotate simultaneously. Since the two first transmission wheels are transmitted to the two second transmission wheels through two transmission belts, at this time, the two transmission belts are synchronously driven, which can drive the powder loading trough box fixed to the L-shaped rod to translate, thereby achieving uniform material spreading during SLS printing, high structural stability, long effective displacement stroke distance, and good working effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0017] Figure 2 It is a schematic diagram of the cross-sectional structure of the frame shell in the utility model from top view;

[0018] Figure 3 This is a three-dimensional enlarged structural diagram of the powder tank box in the utility model;

[0019] Figure 4 It is a schematic diagram of the top cross-sectional structure of the powder spreading opening in the utility model.

[0020] The corresponding relationship between the illustrations and component names in the figure is as follows:

[0021] 1. Frame shell; 2. Slide; 3. Powder loading trough box; 4. Powder spreading port; 5. Stepper motor; 6. Rotating rod; 7. First transmission wheel; 8. Second transmission wheel; 9. Transmission belt; 10. L-shaped rod; 11. Servo motor; 12. First unloading roller; 13. Second unloading roller; 14. Rotating pin; 15. Gear; 16. Guide plate; 17. Cover shell; 18. PLC controller; 19. Mounting plate. DETAILED DESCRIPTION

[0022] See also Figures 1 to 4 In the practical embodiment, an automatic feeding and powder spreading mechanism of an SLS printer, and the powder box and other structures of the automatic feeding mechanism are the prior art of the comparative documents in the background technology, so no further explanation is given here. The device is installed on the printing platform of the SLS printer, including a frame shell 1, a double-rod reciprocating translation mechanism is provided in the frame shell 1, and a sliding opening 2 is provided on the upper side of the two horizontal and vertical ends of the frame shell 1, and the two ends of the double-rod reciprocating translation mechanism pass through the two sliding openings 2 respectively and are fixedly connected with a powder loading slot box 3, and the bottom of the powder loading slot box 3 is connected to a powder spreading opening 4, and a material discharge mechanism is provided in the powder spreading opening 4;

[0023] The double-rod reciprocating translation mechanism includes a stepper motor 5 fixed to one side of the frame shell 1, the main shaft end of the stepper motor 5 extends through the vertical end of the frame shell 1 and is fixedly connected to a rotating rod 6, and two first transmission wheels 7 are fixedly connected to the rotating rod 6, and the inner walls of the two vertical ends of the frame shell 1 are rotatably connected to the second transmission wheels 8 through a rotating shaft, and the two first transmission wheels 7 are one-to-one transmission connected to the two second transmission wheels 8 through a transmission belt 9, and the upper sides of the two transmission belts 9 are fixedly connected to two symmetrically arranged L-shaped rods 10, and the two L-shaped rods 10 pass through the two slides 2 respectively and are fixedly connected to the powder loading trough box 3. When powder is spread during printing, the stepper motor 5 is started to work, driving the two first transmission wheels 7 on the rotating rod 6 to rotate at the same time. Since the two first transmission wheels 7 are transmitted to the two second transmission wheels 8 through the two transmission belts 9, at this time, the two transmission belts 9 are synchronously driven, which can drive the powder loading trough box 3 fixed to the L-shaped rod 10 to translate, thereby achieving uniform material spreading during SLS printing, high structural stability, long effective distance of displacement stroke, and good working effect.

[0024] like Figure 4 As shown: the unloading mechanism includes a servo motor 11 fixed at one end of the powder spreading port 4, the main shaft end of the servo motor 11 extends through the powder spreading port 4 and is fixedly connected to a first unloading roller 12, the inner wall of the powder spreading port 4 is rotatably connected to a second unloading roller 13 through a first bearing seat, one end of the first unloading roller 12 and the second unloading roller 13 are fixedly connected to a rotating pin 14, and one end of the two rotating pins 14 extends through the outer wall of the powder spreading port 4 and is fixedly connected to two meshing gears 15, start the servo motor 11 to drive the first unloading roller 12 to rotate, because the two gears 15 are meshingly connected, thereby driving the two rotating pins 14 to rotate at the same time, thereby driving the first unloading roller 12 and the second unloading roller 13 to rotate towards each other, so that the printing powder falling into the powder spreading port 4 can be stably unloaded, thereby improving the uniformity of the spreading.

[0025] like Figure 4 As shown: two guide plates 16 arranged obliquely and symmetrically are fixedly connected to the inner walls of the powder spreading opening 4 above the first unloading roller 12 and the second unloading roller 13, which can concentrate the printing powder to fall between the first unloading roller 12 and the second unloading roller 13 for centralized unloading.

[0026] like Figure 4 As shown: a cover 17 is fixedly connected to one side of the powder spreading port 4, and the two gears 15 are both located in the cover 17 to provide dust and water protection.

[0027] like Figure 2 As shown: an inner wall of one side of the frame shell 1 is rotatably connected to one end of the rotating rod 6 through a second bearing seat, which can support the rotation of the rotating rod 6.

[0028] like Figure 1As shown: a PLC controller 18 is fixedly connected to one side of the frame shell 1, and one end of the double-rod reciprocating translation mechanism and the unloading mechanism are respectively electrically connected to the PLC controller 18, so the operation is convenient.

[0029] like Figure 1 As shown: four symmetrically arranged mounting plates 19 are fixedly connected to the four corners on both sides of the frame shell 1 for mounting.

[0030] Working principle: When the device is used to perform powder spreading processing during the operation of the SLS printer, first, the servo motor 11 is started to drive the first feed roller 12 to rotate. Since the two gears 15 are meshed and connected, the two rotating pins 14 are driven to rotate at the same time, and then the first feed roller 12 and the second feed roller 13 are driven to rotate towards each other, so that the printing powder falling into the powder spreading port 4 can be stably discharged to improve the uniformity of the material spreading; at the same time, the stepper motor 5 is started to drive the two first transmission wheels 7 on the rotating rod 6 to rotate at the same time. Since the two first transmission wheels 7 are driven by the two second transmission wheels 8 through the two transmission belts 9, at this time, the two transmission belts 9 are driven synchronously, which can drive the powder loading trough box 3 fixed to the L-shaped rod 10 to move horizontally, so as to achieve uniform material spreading during SLS printing. The structure has high stability, a long effective distance of displacement stroke, and a good working effect.

[0031] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An automatic material replenishment and powder spreading mechanism for an SLS printer, comprising a frame shell (1), characterized in that: A double-rod reciprocating translation mechanism is provided in the frame shell (1), and a sliding opening (2) is provided on the upper side of the two horizontal ends of the frame shell (1), and the two ends of the double-rod reciprocating translation mechanism pass through the two sliding openings (2) respectively and are fixedly connected to a powder loading trough box (3), and a powder spreading opening (4) is provided at the bottom of the powder loading trough box (3), and a material discharge mechanism is provided in the powder spreading opening (4); The double-rod reciprocating translation mechanism comprises a stepper motor (5) fixed on one side of the frame shell (1); the main shaft end of the stepper motor (5) extends through the vertical end of the frame shell (1) and is fixedly connected to a rotating rod (6); and two first transmission wheels (7) are fixedly connected to the rotating rod (6); the inner walls of the two vertical ends of the frame shell (1) are rotatably connected to the second transmission wheels (8) through a rotating shaft; the two first transmission wheels (7) are connected to the two second transmission wheels (8) one by one through a transmission belt (9); the upper sides of the two transmission belts (9) are fixedly connected to two symmetrically arranged L-shaped rods (10), and the two L-shaped rods (10) respectively pass through the two sliding openings (2) and are fixedly connected to the powder tank box (3).

2. The automatic material replenishment and powder spreading mechanism of an SLS printer according to claim 1, characterized in that: The unloading mechanism comprises a servo motor (11) fixed at one end of the powder spreading port (4), the main shaft end of the servo motor (11) extends through the powder spreading port (4) and is fixedly connected to a first unloading roller (12), the inner wall of the powder spreading port (4) is rotatably connected to a second unloading roller (13) via a first bearing seat, one end of the first unloading roller (12) and the second unloading roller (13) are both fixedly connected to a rotating pin (14), and one end of the two rotating pins (14) extend through the outer wall of the powder spreading port (4) and are fixedly connected to two meshing gears (15).

3. The automatic material replenishment and powder spreading mechanism of an SLS printer according to claim 2, characterized in that: Two material guide plates (16) arranged obliquely and symmetrically are fixedly connected to the inner walls on both sides of the powder spreading opening (4) located above the first material discharge roller (12) and the second material discharge roller (13).

4. The automatic material replenishment and powder spreading mechanism of an SLS printer according to claim 2, characterized in that: A cover shell (17) is fixedly connected to one side of the powder spreading port (4), and the two gears (15) are both located in the cover shell (17).

5. The automatic material replenishment and powder spreading mechanism of an SLS printer according to claim 1, characterized in that: An inner wall on one side of the frame shell (1) is rotatably connected to one end of a rotating rod (6) via a second bearing seat.

6. The automatic material replenishment and powder spreading mechanism of an SLS printer according to claim 1, characterized in that: A PLC controller (18) is fixedly connected to one side of the frame shell (1), and one end of the double-rod reciprocating translation mechanism and the unloading mechanism are respectively electrically connected to the PLC controller (18).

7. The automatic material replenishment and powder spreading mechanism of an SLS printer according to claim 1, characterized in that: Four symmetrically arranged mounting plates (19) are fixedly connected to the four corners on both sides of the frame shell (1).

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