A 3D printing device with automatic substrate replacement function

Abstract

The present invention discloses a 3D printing device with the function of automatically replacing substrates, including a device body, a vacuum pump installed on the top of the device body, and an air pump installed on the side of the device body, the inner bottom wall of the device body is provided with a transverse guide groove downward, and a longitudinal powder scraping groove is vertically provided in the middle of the transverse guide groove, the bottom wall of the transverse guide groove is provided with a substrate receiving cavity, a forming cylinder, and a substrate storage cavity downward in sequence, the forming cylinder is provided with a lifting cylinder and a pad installed at the end of the lifting cylinder, the two side walls of the substrate receiving cavity are provided with a reciprocating unloading mechanism, the two side walls of the substrate storage cavity are provided with a reciprocating loading mechanism, and the upper part of the substrate storage cavity is provided with a first movable clamping member for conveying the substrate to the forming cylinder. The present invention realizes the automatic replacement of substrates, does not need to manually replace the substrates, reduces the waiting time, and improves the overall parts processing efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing, and in particular to a 3D printing device with a function of automatically replacing a substrate. Background Art

[0002] Metal 3D printing technology is based on digital models and manufactures parts by stacking metal materials layer by layer. It does not require molds and can quickly manufacture metal parts with complex shapes, greatly shortening the product development cycle and reducing production costs. It also provides strong support for small-batch customized production and innovative design.

[0003] With current 3D printing equipment, after printing is completed, the substrate needs to be taken out of the equipment before the next set of printing can be carried out. During the process of taking out and reinserting the substrate, the powder of the printed substrate needs to be cleaned, and the new substrate needs to be installed between the pad. Therefore, a lot of time is needed in the process of replacing the substrate. When batch printing is required, the above work needs to be repeated between batches, which affects the printing efficiency. Summary of the invention

[0004] The purpose of the present invention is to solve the problem of affecting printing efficiency in the prior art, and to propose a 3D printing device with an automatic substrate replacement function.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A 3D printing device with a function of automatically replacing a substrate, comprising a device body, a vacuum pump installed on the top of the device body and an air pump installed on the side of the device body, the inner bottom wall of the device body is provided with a transverse guide groove downwardly, and a longitudinal powder scraping groove is vertically provided in the middle of the transverse guide groove, the bottom wall of the transverse guide groove is provided with a substrate receiving cavity, a forming cylinder and a substrate storage cavity in sequence downwardly, a lifting cylinder and a pad installed at the end of the lifting cylinder are provided in the forming cylinder, a reciprocating unloading mechanism is installed on both side walls of the substrate receiving cavity, a reciprocating loading mechanism is installed on both side walls of the substrate storage cavity, a first movable clamping member for conveying the substrate to the forming cylinder is provided above the substrate storage cavity, a second movable clamping member for conveying the substrate to the substrate receiving cavity is provided above the forming cylinder, and a lead screw driving member for driving the first movable clamping member and the second movable clamping member is installed on one side of the transverse guide groove;

[0007] The reciprocating loading mechanism and the reciprocating unloading mechanism have the same structure and only have different moving directions. The reciprocating loading mechanism and the reciprocating unloading mechanism both include an annular guide rail and a guide rail slider assembly installed on the annular guide rail, and the substrate is placed between two parallel guide rail slider assemblies. When the guide rail slider assembly of the reciprocating loading mechanism moves to an inclined position above the annular guide rail, the guide rail slider assembly extends and drives the substrate to leave the substrate storage cavity. When the guide rail slider assembly of the reciprocating unloading mechanism moves to an inclined position above the annular guide rail, the guide rail slider assembly contracts and drives the substrate to enter the substrate receiving cavity.

[0008] Preferably, a powder spreading assembly is provided above one end of the longitudinal powder scraping groove, and a powder bin is provided above the powder spreading assembly, and a discharge port of the powder bin faces the longitudinal powder scraping groove on one side of the forming cylinder.

[0009] Preferably, the powder spreading assembly includes a powder spreading knife holder installed on the inner wall of the equipment body on one side of the powder silo, a powder spreading bar arranged in the powder spreading knife holder, and a powder spreading scraper installed on the powder spreading bar, and the bottom end of the powder spreading scraper laterally covers the entire longitudinal powder scraping groove.

[0010] Preferably, an observation window is provided at the upper end of one side of the equipment body facing the forming cylinder, and a material taking channel connected to the substrate receiving cavity and a material discharging channel connected to the substrate storage cavity are provided below the observation window.

[0011] Preferably, a powder cleaning assembly connected to a vacuum pump and an air pump is provided directly below the substrate receiving chamber, the powder cleaning assembly comprises a plurality of lifting cylinders fixed on the top wall inside the equipment body and a powder suction cover installed at the bottom ends of the plurality of lifting cylinders, the powder suction cover moves downward with the lifting cylinders and covers directly above the substrate receiving chamber, the top end of the powder suction cover is connected to an air outlet connected to an air suction pipe of the vacuum pump, and the lower end of the side of the powder suction cover is provided with an air inlet connected to the air outlet pipe of the air pump.

[0012] Preferably, the screw drive comprises a driving screw and a guide rod installed inside the equipment body at one end away from the powder spreading assembly. A driving motor connected to the driving screw is provided on the outside of the equipment body. The driving screw and the guide rod are arranged parallel to each other up and down.

[0013] Preferably, two of the first movable clamping member and the second movable clamping member are provided and have the same size and structure, wherein the first movable clamping member includes a movable slider installed on a driving screw and a guide rod, a supporting cross bar vertically fixed to the side of the movable slider, and a first electric push rod installed at both ends of the supporting cross bar, and the bottom end of the first electric push rod is connected to a clamping plate that fits the side of the substrate.

[0014] Preferably, the distance between the two first movable clamping members and the two second movable clamping members is the same as the length of the base plate, and the width of the base plate is the same as the width of the transverse guide groove.

[0015] Preferably, a groove for placing the substrate is formed at the top of the pad, and a second electric push rod and a supporting horizontal plate for supporting the substrate are arranged in the groove.

[0016] Preferably, both side walls of the substrate storage cavity and the substrate receiving cavity are provided with inner grooves, the reciprocating loading mechanism and the reciprocating unloading mechanism are both installed in the inner grooves, the guide rail slider assembly includes a slide seat installed on the annular guide rail, a supporting outer plate fixed to the side of the slide seat, a telescopic cylinder installed on the inner side of the supporting outer plate, and a telescopic inner plate connected to the end of the telescopic cylinder, the telescopic inner plate is tilted away from one end of the supporting outer plate, when the slide seat moves to the top of the annular guide rail and tilts 45°, the telescopic cylinder extends to the maximum so that the end inclined surface of the telescopic inner plate extends to the bottom surface of the transverse guide groove and fits with the bottom surface of the transverse guide groove.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] The present invention provides a substrate storage cavity, a substrate receiving cavity, a lead screw driving member, a first movable clamping member and a second movable clamping member in the main body of the device. When the parts processing on the substrate above the pad is completed, the second movable clamping member moves the used substrate to the top of the substrate receiving cavity, and the first movable clamping member moves the unused substrate to the top of the pad, so that the automatic replacement of the substrate is realized, the substrate does not need to be replaced manually, the waiting time is reduced, and the overall parts processing efficiency is improved.

[0019] In addition, unused substrates are loaded in sequence from bottom to top in the substrate storage chamber, and used substrates are collected in sequence from top to bottom in the substrate receiving chamber. When the substrates in the substrate storage chamber are used up, or the substrate receiving chamber has contained all the substrates, it is only necessary to load the substrates from the lower end of the substrate storage chamber or take the substrates out from the lower end of the substrate receiving chamber. There is still no need to stop the main body of the equipment for processing, and the substrates can be loaded into or taken out of the main body of the equipment again. This not only realizes the automatic replacement of the substrates, but also can realize the cyclic loading and removal of the substrates. In cooperation with the automatic replacement of the substrates, the overall processing efficiency is further improved, and continuous processing without downtime can be realized during batch printing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of a 3D printing device with an automatic substrate replacement function proposed by the present invention;

[0021] Figure 2 The internal schematic diagram of a 3D printing device with automatic substrate replacement function proposed by the present invention Figure 1 ;

[0022] Figure 3A cross-sectional view of a 3D printing device with an automatic substrate replacement function proposed by the present invention Figure 1 ;

[0023] Figure 4 A 3D printing device with automatic substrate replacement function proposed by the present invention Figure 3 Main view;

[0024] Figure 5 The internal schematic diagram of a 3D printing device with automatic substrate replacement function proposed by the present invention Figure 2 ;

[0025] Figure 6 A cross-sectional view of a 3D printing device with an automatic substrate replacement function proposed by the present invention Figure 2 ;

[0026] Figure 7 A cross-sectional view of a 3D printing device with an automatic substrate replacement function proposed by the present invention Figure 3 ;

[0027] Figure 8 This is a schematic diagram of the structure of a powder cleaning component of a 3D printing device with an automatic substrate replacement function proposed by the present invention;

[0028] Fig. 9 This is a schematic structural diagram of a first movable clamping member of a 3D printing device with a function of automatically replacing a substrate proposed by the present invention;

[0029] Fig.10 A 3D printing device with automatic substrate replacement function proposed by the present invention Figure 7 Enlarged view of point A in the middle;

[0030] Fig.11 A cross-sectional view of a backing plate of a 3D printing device with an automatic substrate replacement function proposed by the present invention;

[0031] Fig.12 This is a state diagram of a reciprocating feeding mechanism of a 3D printing device with an automatic substrate replacement function proposed by the present invention;

[0032] Fig.13 This is a state diagram of the reciprocating feeding mechanism of a 3D printing device with automatic substrate replacement function proposed by the present invention.

[0033] In the figure: 1. Equipment body; 2. Vacuum pump; 3. Air pump; 4. Horizontal guide groove; 5. Longitudinal powder scraping groove; 6. Screw drive; 7. Powder spreading assembly; 8. Powder cleaning assembly; 9. Base plate; 10. Powder bin; 11. First movable clamping member; 12. Second movable clamping member; 13. Reciprocating unloading mechanism; 14. Reciprocating loading mechanism; 101. Observation window; 102. Base plate receiving chamber; 103. Forming cylinder; 104. Base plate storage chamber; 105. Lifting cylinder; 106. Pad; 107. Inner groove; 61. Driving screw; 62. Guide rod; 63. Driving Driving motor; 71, powder spreading knife holder; 72, powder spreading rod; 73, powder spreading scraper; 81, powder suction cover; 82, lifting cylinder; 83, air inlet; 84, air outlet; 111, moving slider; 112, supporting cross bar; 113, first electric push rod; 114, clamping plate; 141, annular guide rail; 142, guide rail slider assembly; 1021, material taking channel; 1041, material discharging channel; 1421, slide seat; 1422, supporting outer plate; 1423, telescopic cylinder; 1424, telescopic inner plate; 1061, second electric push rod; 1062, supporting cross plate. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0035] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention 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, and therefore cannot be understood as a limitation on the present invention.

[0036] Reference Figure 1-Figure 13 A 3D printing device with an automatic substrate replacement function includes a device body 1, a vacuum pump 2 installed on the top of the device body 1, and an air pump 3 installed on the side of the device body 1. The air pump 3 is used to discharge inert gas into the device body 1. The inner bottom wall of the device body 1 is downwardly provided with a transverse guide groove 4, and a longitudinal powder scraping groove 5 is vertically provided in the middle of the transverse guide groove 4. The transverse guide groove 4 and the longitudinal powder scraping groove 5 are in a cross shape. The bottom wall of the transverse guide groove 4 is sequentially downwardly provided with a substrate receiving cavity 102, a forming cylinder 103 and a substrate storage cavity 104. Figure 3From left to right in the figure, the substrate receiving chamber 102 is used to receive the substrate 9 after printing and transport the substrate 9 from top to bottom, the substrate storage chamber 104 is used to place unused substrates 9, a lifting cylinder 105 and a pad 106 installed at the end of the lifting cylinder 105 are provided in the forming cylinder 103, and reciprocating unloading mechanisms 13 are installed on both side walls of the substrate receiving chamber 102. The reciprocating unloading mechanisms 13 transport the substrate 9 downward in a cycle, and reciprocating loading mechanisms 14 are installed on both side walls of the substrate storage chamber 104. The reciprocating loading mechanisms 14 transport the substrate 9 upward in a cycle, and a first movable clamping member 11 for transporting the substrate 9 to the forming cylinder 103 is provided above the substrate storage chamber 104, and a second movable clamping member 12 for transporting the substrate 9 to the substrate receiving chamber 102 is provided above the forming cylinder 103, and a screw driving member 6 for driving the first movable clamping member 11 and the second movable clamping member 12 is installed on one side of the transverse guide groove 4. With the cooperation of the first movable clamping member 11 and the second movable clamping member 12, the unused substrate 9 can be transported from the substrate storage chamber 104 to the top of the pad 106. At the same time, the printed substrate 9 can be transported from the pad 106 to the substrate receiving chamber 102, thereby realizing automatic replacement of the substrate 9 and enabling the printing device to perform continuous printing operations.

[0037] The reciprocating feeding mechanism 14 and the reciprocating unloading mechanism 13 have the same structure, and only the moving direction is different. The reciprocating feeding mechanism 14 and the reciprocating unloading mechanism 13 both include an annular guide rail 141 and a guide rail slider assembly 142 installed on the annular guide rail 141, and also include a servo motor that drives the annular guide rail 141 to work, so that the guide rail slider assembly 142 can move along the annular guide rail 141, and the substrate 9 is placed between two parallel guide rail slider assemblies 142, that is, the substrate 9 is supported, and the substrate 9 is in the substrate storage cavity 104, and the two side walls of the substrate 9 slide tightly against the inner wall of the substrate storage cavity 104, so that the guide rail slider assembly 14 2 drives the substrate 9 to move upward to slide, which can prevent the substrate 9 from tilting or deflecting. When the guide rail slider assembly 142 of the reciprocating feeding mechanism 14 moves to the inclined position above the annular guide rail 141, the guide rail slider assembly 142 extends and drives the substrate 9 to leave the substrate storage chamber 104. When the guide rail slider assembly 142 of the reciprocating unloading mechanism 13 moves to the inclined position above the annular guide rail 141, the guide rail slider assembly 142 contracts and drives the substrate 9 to enter the substrate receiving chamber 102, so that the substrate 9 is circulated from the substrate storage chamber 104 to the transverse guide groove 4 for feeding, and similarly, the substrate 9 is circulated from the transverse guide groove 4 to the substrate receiving chamber 102 for receiving. In order to ensure that the guide rail slider assembly 142 automatically extends when it moves to an inclination of 45°, an inductive sensor, such as a photoelectric sensor, is installed at the top of the annular guide rail 141 at an inclination of 45°. Whenever the guide rail slider assembly 142 moves and inclinations 45°, it corresponds to the inductive sensor to achieve accurate position judgment, and at this time the annular guide rail 141 is paused, and the guide rail slider assembly 142 begins to extend until the substrate 9 is replaced. After the guide rail slider assembly 142 shrinks, the annular guide rail 141 moves again until the next group of guide rail slider assemblies 142 correspond to the inductive sensor for sensing.

[0038] A powder spreading component 7 is provided above one end of the longitudinal powder scraping groove 5, and a powder bin 10 is provided above the powder spreading component 7. The discharge port of the powder bin 10 faces the longitudinal powder scraping groove 5 on one side of the forming cylinder 103. The material discharged each time the powder bin 10 is opened is kept as consistent as possible, so that the powder spreading component 7 can spread the discharged powder evenly on the surface of the substrate 9. The powder spreading component 7 includes a powder spreading knife frame 71 installed on the inner wall of the equipment body 1 on one side of the powder bin 10, a powder spreading bar 72 arranged in the powder spreading knife frame 71, and a powder spreading scraper 73 installed on the powder spreading bar 72. The bottom end of the powder spreading scraper 73 covers the entire longitudinal powder scraping groove 5 horizontally to ensure that the powder spreading scraper 73 can cover the entire pad 106 and the substrate 9.

[0039] An observation window 101 is provided at the upper end of one side of the equipment body 1, facing the forming cylinder 103, for observing the printing process to check whether there are any printing errors, and a material collection channel 1021 connected to the substrate receiving chamber 102 and a material discharge channel 1041 connected to the substrate storage chamber 104 are provided below the observation window 101. The openings of the material collection channel 1021 and the material discharge channel 1041 are both provided with sealed hatches, which can be opened when needed to take and place the substrate 9.

[0040] Before the substrate 9 is automatically collected into the substrate collecting chamber 102, it is necessary to clean the powder above the substrate 9 to avoid excessive powder entering the substrate collecting chamber 102, which would affect the environment when the substrate 9 is taken out. A powder cleaning component 8 connected to the vacuum pump 2 and the air pump 3 is also provided directly below the substrate collecting chamber 102. The powder cleaning component 8 includes a plurality of lifting cylinders 82 fixed on the internal top wall of the equipment body 1 and a powder suction cover 81 installed at the bottom ends of the plurality of lifting cylinders 82. The powder suction cover 81 moves downward with the lifting cylinders 82 and covers the top of the substrate collecting chamber 102. The top of the powder suction cover 81 is connected to an air outlet 84 connected to the air suction pipe of the vacuum pump 2, and the lower end of the side of the powder suction cover 81 is provided with an air inlet 83 connected to the air outlet pipe of the air pump 3. When cleaning the powder, the powder suction cover 81 moves downward to cover the top of the substrate 9 and separates the top of the substrate 9 into a sealed space. At this time, the air pump 3 discharges the inert gas into the powder suction cover 81, and the air inlet 83 is directly opposite to the top of the substrate 9. When blowing, the powder on the substrate 9 is blown, and then the vacuum pump 2 exhausts air to absorb and process the blown powder and the residual powder on the substrate 9. The height of the powder suction cover 81 is adapted according to the height of the substrate 9 and the printed finished parts, so that the air outlet 84 is closer to the substrate 9.

[0041] The screw drive 6 includes a driving screw 61 and a guide rod 62 installed inside the equipment body 1 at one end away from the powder spreading assembly 7. A driving motor 63 connected to the driving screw 61 is provided on the outside of the equipment body 1. The driving screw 61 and the guide rod 62 are arranged parallel to each other up and down.

[0042] There are two first movable clamping members 11 and two second movable clamping members 12, and they are of the same size and structure, wherein the first movable clamping members 11 and the second movable clamping members 12 each include a movable slider 111 mounted on the driving screw 61 and the guide rod 62, a support cross bar 112 vertically fixed on the side of the movable slider 111, and a first electric push rod 113 mounted on both ends of the support cross bar 112, and the bottom ends of the first electric push rods 113 are connected with clamping plates 114 that fit the side of the substrate 9. The distance between the two first movable clamping members 11 and the two second movable clamping members 12 is the same as the length of the substrate 9, and the width of the substrate 9 is the same as the width of the transverse guide groove 4. When the first electric push rod 113 is in a retracted state, the substrate 9 is above the powder scraper 73 and will not affect the work of the powder scraper 73. The bottom ends of the clamping plates 114 are arc-shaped on both sides, and the sides of the arc are made of soft materials such as rubber or silicone, so that when the clamping plates 114 move downward, they can better fit the substrate 9.

[0043] In order to ensure that the substrate 9 is stably placed on the pad 106, a groove for placing the substrate 9 is opened at the top of the pad 106, and a second electric push rod 1061 and a supporting cross plate 1062 for supporting the substrate 9 are provided in the groove. When the second electric push rod 1061 is retracted, the supporting cross plate 1062 is at the lower end of the groove, and the substrate 9 can sink into the groove to achieve stability in the pad 106. When the substrate 9 needs to be taken out, the second electric push rod 1061 is extended to make the top surface of the supporting cross plate 1062 flush with the top surface of the pad 106, and the substrate 9 is pushed out of the groove.

[0044] Specifically, both side walls of the substrate storage chamber 104 and the substrate receiving chamber 102 are provided with inner grooves 107, the reciprocating feeding mechanism 14 and the reciprocating unloading mechanism 13 are both installed in the inner grooves 107, the guide rail slider assembly 142 includes a slide seat 1421 installed on the annular guide rail 141, a supporting outer plate 1422 fixed to the side of the slide seat 1421, a telescopic cylinder 1423 installed on the inner side of the supporting outer plate 1422, and a telescopic cylinder 1423 connected to the end of the telescopic cylinder 1423. The inner plate 1424 and the slide 1421 move along the annular guide rail 141 and drive the supporting outer plate 1422 to move. The telescopic inner plate 1424 is tilted away from one end of the supporting outer plate 1422. When the slide 1421 moves to the top of the annular guide rail 141 and tilts 45°, the telescopic cylinder 1423 extends to the maximum so that the end inclined surface of the telescopic inner plate 1424 extends to the bottom surface of the transverse guide groove 4 and fits with the bottom surface of the transverse guide groove 4 to better support the substrate 9.

[0045] Working principle: Refer to Figure 1-Figure 12Before processing the parts, first load the metal powder into the powder bin 10, empty the substrate receiving chamber 102, fill the substrate storage chamber 104 with the substrate 9, and drive the pad 106 to move by the lifting cylinder 105, so that the top surface of the pad 106 is flush with the bottom wall surface of the horizontal guide groove 4, and then start to put the substrate 9 in;

[0046] The annular guide rail 141 of the reciprocating feeding mechanism 14 is started to work, and the annular guide rail 141 transports the substrate 9 upward. When the substrate 9 at the top is transported to the top opening close to the substrate storage chamber 104, the guide rail slider assembly 142 begins to convert from horizontal ascent to rotational motion. During the rotation of the guide rail slider assembly 142, the substrate 9 continues to be driven to move upward. At the same time, the telescopic cylinder 1423 of the guide rail slider assembly 142 begins to extend and drives the telescopic inner plate 1424 to extend out from the supporting outer plate 1422 until the guide rail slider assembly 142 rotates to 45°. At this time, the telescopic cylinder 1423 extends to the maximum, and the top surface of the telescopic inner plate 1424 is flush with the bottom wall surface of the transverse guide groove 4, moving the substrate 9 to the substrate storage chamber 104. The first electric push rod 113 of the first movable clamping member 11 extends to drive the plurality of clamping plates 114 to move downward and clamp them at the four corners of the substrate 9. Then the driving motor 63 works to drive the driving screw 61 to rotate, and the moving slider 111, the supporting cross bar 112 and the first electric push rod 113 drive the plurality of clamping plates 114 to move toward the forming cylinder 103, and drive the substrate 9 to move toward the forming cylinder 103 until the substrate 9 moves to the top of the pad 106 and the substrate 9 enters the groove on the top surface of the pad 106. At this time, the first electric push rod 113 contracts, and the driving motor 63 works in the reverse direction to move the first movable clamping member 11 back to the top of the substrate storage chamber 104, waiting for the next group of substrates 9 to be delivered.

[0047] When printing parts on the substrate 9, the lifting cylinder 105 works again to make the top surface of the substrate 9 flush with the bottom wall of the horizontal guide groove 4. At this time, the powder bin 10 starts to unload and discharges the powder to one end of the longitudinal powder scraping groove 5. Then the powder spreading motor drives the powder spreading rod 72 to rotate, and the powder spreading scraper 73 moves in a square along the length of the powder spreading rod 72 to translate the fallen powder to the top of the substrate 9, so that the metal powder is evenly spread on the upper surface of the substrate 9. After the powder spreading scraper 73 completes the powder spreading, it returns to the side below the powder bin 10 again, and the printing laser starts to work, so that the laser can scan and sinter the current layer of metal powder layer by layer. After each scan and sintering, the lifting cylinder 105 controls the pad 106 and the pad 106 to drop a certain distance, and then the powder spreading scraper 73 spreads powder again, and the above action process is repeated until printing is completed;

[0048] After printing is completed, the first electric push rods 113 of the first movable clamping member 11 and the second movable clamping member 12 are extended, driving the clamping plate 114 to move downward, so that the multiple clamping plates 114 of the first movable clamping member 11 move downward again to clamp the substrate 9 that has risen to the top of the substrate storage cavity 104 again, and the multiple clamping plates 114 of the second movable clamping member 12 move downward to clamp the two sides of the printed substrate 9, and the second electric push rod 1061 extends, driving the supporting cross plate 1062 to move upward in the groove, and the substrate 9 is ejected from the groove of the pad 106, and then the driving screw is started. 61 works, and the driving drive drives the first movable clamping member 11 and the second movable clamping member 12 to move. The first movable clamping member 11 moves the clamped substrate 9 to above the pad 106, and cooperates with the pad 106 again. The second movable clamping member 12 moves the clamped substrate 9 to above the substrate receiving cavity 102 and is supported by the reciprocating feeding mechanism 13. After the movement is completed, the first electric push rod 113 retracts again, and the driving motor 63 reverses to restore the first movable clamping member 11 and the second movable clamping member 12, driving the next group of substrates 9 to be transported, and completing the automatic replacement of the substrates 9;

[0049] When the printed substrate 9 moves to the top of the substrate receiving chamber 102, the lifting cylinder 82 controls the powder suction cover 81 to move downward and cover the top of the substrate 9, isolating the substrate 9 in a sealed space, and the air pump 3 starts to fill the inert gas into the powder suction cover 81 through the air inlet 83, and blows the residual powder on the substrate 9. After the inert gas content reaches the powder cleaning requirement, the vacuum pump 2 starts to work, and the blown powder is absorbed by the air outlet 84 and the telescopic hose. After the absorption is completed, the lifting cylinder 82 shrinks and recovers, and the reciprocating feeding mechanism 13 stores the substrate 9 in the substrate receiving chamber 102;

[0050] When the substrate 9 is stored in the substrate receiving cavity 102, the annular guide rail 141 of the reciprocating feeding mechanism 13 works, driving the guide rail slider assembly 142 to move downward. At the same time, the guide rail slider assembly 142 is tilted and unfolded. During the downward rotation, the second electric push rod 1061 slowly shrinks until the guide rail slider assembly 142 rotates to a horizontal state to complete the shrinkage. The substrate 9 is supported by two horizontal guide rail slider assemblies 142, and the substrate 9 is moved from the top of the substrate receiving cavity 102 to the inside of the substrate receiving cavity 102 to complete the feeding. At the same time, the other two guide rail slider assemblies 142 that are moved to the top of the reciprocating feeding mechanism 13 are unfolded again when they are tilted at 45°, and the top of the telescopic inner plate 1424 is flush with the bottom wall surface of the transverse guide groove 4, waiting for the next group of substrates 9 that have completed printing.

[0051] The above description 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 according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A 3D printing device with an automatic substrate replacement function, comprising a device body (1), a vacuum pump (2) installed on the top of the device body (1), and an air pump (3) installed on the side of the device body (1), characterized in that: The inner bottom wall of the equipment body (1) is provided with a transverse guide groove (4) extending downward, and a longitudinal powder scraping groove (5) is vertically provided in the middle of the transverse guide groove (4). The bottom wall of the transverse guide groove (4) is provided with a substrate receiving cavity (102), a forming cylinder (103) and a substrate storage cavity (104) in sequence downward, the forming cylinder (103) is provided with a lifting cylinder (105) and a pad (106) installed at the end of the lifting cylinder (105), and the two side walls of the substrate receiving cavity (102) are provided with a reciprocating feeding mechanism ( 13), a reciprocating feeding mechanism (14) is installed on both side walls of the substrate storage chamber (104), a first movable clamping member (11) for conveying the substrate (9) to the forming cylinder (103) is installed above the substrate storage chamber (104), a second movable clamping member (12) for conveying the substrate (9) to the substrate receiving chamber (102) is installed above the forming cylinder (103), and a screw driving member (6) for driving the first movable clamping member (11) and the second movable clamping member (12) is installed on one side of the transverse guide groove (4); The reciprocating loading mechanism (14) and the reciprocating unloading mechanism (13) are of the same structure and differ only in the direction of movement. The reciprocating loading mechanism (14) and the reciprocating unloading mechanism (13) both comprise an annular guide rail (141) and a guide rail slider assembly (142) mounted on the annular guide rail (141), and the substrate (9) is placed between two parallel guide rail slider assemblies (142). When the guide rail slider assembly (142) of the reciprocating loading mechanism (14) moves to an inclined position above the annular guide rail (141), the guide rail slider assembly (142) extends and drives the substrate (9) to leave the substrate storage chamber (104); when the guide rail slider assembly (142) of the reciprocating unloading mechanism (13) moves to an inclined position above the annular guide rail (141), the guide rail slider assembly (142) contracts and drives the substrate (9) to enter the substrate receiving chamber (102); The top end of the pad (106) is provided with a groove for placing the base plate (9), and a second electric push rod (1061) and a supporting horizontal plate (1062) for supporting the base plate (9) are arranged in the groove.

2. A 3D printing device with automatic substrate replacement function according to claim 1, characterized in that: A powder spreading assembly (7) is provided above one end of the longitudinal powder scraping groove (5), and a powder material bin (10) is provided above the powder spreading assembly (7), wherein a discharge port of the powder material bin (10) faces the longitudinal powder scraping groove (5) on one side of the forming cylinder (103).

3. The 3D printing device with automatic substrate replacement function according to claim 2, characterized in that: The powder spreading assembly (7) comprises a powder spreading knife frame (71) mounted on the inner wall of the equipment body (1) on one side of the powder material bin (10), a powder spreading rod (72) arranged in the powder spreading knife frame (71), and a powder spreading scraper (73) mounted on the powder spreading rod (72), wherein the bottom end of the powder spreading scraper (73) covers the entire longitudinal powder scraping groove (5) in a transverse direction.

4. The 3D printing device with automatic substrate replacement function according to claim 1, characterized in that: An observation window (101) is provided at the upper end of one side of the equipment body (1) facing the forming cylinder (103), and a material taking channel (1021) connected to the substrate receiving chamber (102) and a material discharging channel (1041) connected to the substrate storage chamber (104) are provided below the observation window (101).

5. The 3D printing device with automatic substrate replacement function according to claim 1, characterized in that: A powder cleaning component (8) connected to the vacuum pump (2) and the air pump (3) is also provided directly below the substrate receiving chamber (102). The powder cleaning component (8) comprises a plurality of lifting cylinders (82) fixed on the top wall inside the device body (1) and a powder suction cover (81) installed at the bottom ends of the plurality of lifting cylinders (82). The powder suction cover (81) moves downward following the lifting cylinders (82) and covers directly above the substrate receiving chamber (102). The top end of the powder suction cover (81) is connected to an air outlet (84) connected to the air suction pipe of the vacuum pump (2), and the lower end of the side of the powder suction cover (81) is provided with an air inlet (83) connected to the air outlet pipe of the air pump (3).

6. The 3D printing device with automatic substrate replacement function according to claim 2, characterized in that: The screw drive (6) comprises a driving screw (61) and a guide rod (62) installed inside the device body (1) at one end away from the powder spreading assembly (7). A driving motor (63) connected to the driving screw (61) is provided on the outside of the device body (1). The driving screw (61) and the guide rod (62) are arranged parallel to each other in an upper and lower direction.

7. The 3D printing device with automatic substrate replacement function according to claim 6, characterized in that: The first movable clamping member (11) and the second movable clamping member (12) are each provided with two members, and are of the same size and structure, wherein the first movable clamping member (11) comprises a movable slider (111) mounted on a driving screw (61) and a guide rod (62), a supporting cross bar (112) vertically fixed to the side of the movable slider (111), and a first electric push rod (113) mounted at both ends of the supporting cross bar (112), wherein the bottom end of each of the first electric push rods (113) is connected to a clamping plate (114) that fits the side of the base plate (9).

8. The 3D printing device with automatic substrate replacement function according to claim 7, characterized in that: The distance between the two first movable clamping members (11) and the two second movable clamping members (12) is the same as the length of the base plate (9), and the width of the base plate (9) is the same as the width of the transverse guide groove (4).

9. The 3D printing device with automatic substrate replacement function according to claim 1, characterized in that: Both side walls of the substrate storage chamber (104) and the substrate receiving chamber (102) are provided with inner grooves (107), the reciprocating loading mechanism (14) and the reciprocating unloading mechanism (13) are both installed in the inner grooves (107), and the guide rail slider assembly (142) comprises a slide seat (1421) installed on the annular guide rail (141), a supporting outer plate (1422) fixed to the side of the slide seat (1421), and a telescopic gasket installed on the inner side of the supporting outer plate (1422). The telescopic cylinder (1423) and a telescopic inner plate (1424) connected to the end of the telescopic cylinder (1423), wherein the telescopic inner plate (1424) is tilted away from one end of the supporting outer plate (1422), and when the slide seat (1421) moves to the top of the annular guide rail (141) and tilts 45 degrees, the telescopic cylinder (1423) is stretched to the maximum so that the end inclined surface of the telescopic inner plate (1424) extends to the bottom surface of the transverse guide groove (4) and fits with the bottom surface of the transverse guide groove (4).

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