Grid type hot bed base plate, 3D printer and method

Abstract

The invention discloses a grid type hot bed base plate, a 3D printer and a method. The base plate comprises a supporting body. The grid assemblies are installed at the top of the supporting body, and the multiple grid assemblies are sequentially arranged in the full-length direction of the supporting body at intervals; the positioning assemblies are installed on the two opposite sides of the supporting body and used for positioning the multiple grid assemblies; the guide assembly is mounted on the positioning assembly, and a pressing assembly is mounted at the top of the guide assembly; and the control device is electrically connected with the pressing assembly, and the control device is used for controlling the pressing assembly to move in the full-length direction of the supporting body through the positioning assembly and pressing the multiple grid assemblies downwards in sequence at the same time, so that the tops of the grid assemblies are separated from the printing workpiece. And after the printing of the workpiece is completed, each grid assembly can be effectively separated from the bottom of the workpiece through the cooperation of the guide assembly and the pressing assembly, the workpiece can be quickly dismounted from the top of the grid assembly, the dismounting efficiency is improved, and the damage to the workpiece is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of 3D printing, and in particular relates to a grid-type hot bed substrate, a 3D printer and a method. Background Art

[0002] Current 3D printers, whether they are FDM (fused deposition modeling) 3D printers, SLA (stereolithography) 3D printers, or SLM (selective area sintering) 3D printers, apply a layer of platform glue on the substrate while heating the substrate during the printing process in order to ensure the adhesion between the workpiece and the substrate and prevent the workpiece from warping and deformation. This article uses FDM as an example to illustrate the problem.

[0003] Due to the dual effects of platform glue and substrate heating, the 3D printer can maintain a fixed position and printing shape during the process of printing the workpiece. Each time a layer is printed, the substrate drops one layer. After multiple layers are stacked, the desired workpiece is finally formed. After printing is completed, the host control system turns off the heating unit of the substrate. After the substrate heating unit stops heating, the temperature of the substrate gradually decreases. Since the substrate has a certain temperature, the workpiece cannot be peeled off the hot bed. After a certain cooling time, the temperature drops to room temperature, but due to the effect of the platform glue, the workpiece still needs to be very difficult to peel off from the substrate.

[0004] The main methods adopted at this stage are: ①. The platform uses glass material as the substrate. Glue is applied and the glass substrate is heated during printing. After printing, it is forcibly peeled off with a scraper; ②. The platform uses a PEI magnetic film substrate adsorbed on the iron-based moving platform, and the platform is heated at the same time. After printing, the PEI magnetic film is removed and the workpiece is removed by bending; ③. Paper tape is pasted on the substrate. The paper tape is more sticky when heated. After printing is completed, the substrate is cooled down and the workpiece is scraped off with a scraper.

[0005] However, the above methods are mainly aimed at small workpieces printed by small desktop 3D printers. For large industrial machines, the printed workpieces are large, requiring high dimensional accuracy and no deformation of the appearance, and the workpieces must not be damaged when removed from the printer.

[0006] For the above reasons, large-scale 3D printers require the printed workpiece to have strong adhesion to the substrate during the printing process. However, due to the strong adhesion and large adhesion area of ​​large workpieces, it is difficult to remove them after printing. Violent removal methods can easily damage the workpiece and even further cause loss of workpiece precision. At the same time, the process of waiting for cooling also indirectly leads to a decrease in printing efficiency. Therefore, the contradiction between requiring strong adhesion during printing and requiring the adhesion to decrease rapidly or even disappear after printing has always existed in large-scale industrial 3D printers.

[0007] In summary, the current design of the printing substrate of large-scale 3D printers is extremely unreasonable and has major production defects. Summary of the invention

[0008] The purpose of the present invention is to provide a grid-type hot bed substrate, a 3D printer and a method, so as to solve the technical defects of the prior art large-scale industrial 3D printers that the workpiece removal time is long and the removal is difficult after printing.

[0009] In order to achieve the above object, the present invention adopts the following technical solutions: In a first aspect, a grid-type hot bed substrate is provided, comprising: Support the main body; A grid assembly is installed on the top of the support body, and a plurality of grid assemblies are sequentially arranged at intervals along the length of the support body; Positioning components, installed on two opposite sides of the supporting body, for positioning the plurality of grid components; A guide assembly is installed on the positioning assembly, and a pressing assembly is installed on the top of the guide assembly; The control device is electrically connected to the pressing assembly, wherein the control device is used to control the pressing assembly to move along the length direction of the supporting body through the positioning assembly, and press the multiple grid assemblies downward in sequence to separate the top of the grid assembly from the printed workpiece.

[0010] Furthermore, the grid assembly comprises a grid plate, a reset unit is symmetrically provided at the bottom of the grid plate, and rolling elements are provided on opposite sides of the grid plate; Positioning holes are provided at two opposite ends of the top of the supporting body, and the resetting unit is installed in the positioning holes; The positioning assembly includes a rear comb plate and a front comb plate, and both the rear comb plate and the front comb plate are provided with elliptical holes. The end of the rolling element extends outward through the elliptical holes to cooperate with the pressing assembly on the guide assembly.

[0011] Furthermore, the reset unit is a reset spring or an elastic ball.

[0012] Furthermore, the rolling element is a bearing or a roller.

[0013] Further, the guide assembly includes a guide rail, which is installed on a side of the rear comb plate and the front comb plate away from the supporting body, and a slider is slidably connected to the guide rail; The pressing assembly includes a motor, a pulley and a boss plate, wherein the motor is mounted at the end of the front comb plate and located on one side of the supporting body, and the pulley is mounted at both ends of the rear comb plate and both ends of the front comb plate; The pulleys at both ends of the rear comb plate and the front comb plate are connected by a transmission belt, the driving end of the motor is connected to the pulley on one end of the front comb plate, and the other end of the motor is connected to the pulley on one end of the rear comb plate through a transmission shaft; The boss plate is installed on the side of the slider, and the end of the boss plate is matched with the rolling element.

[0014] Furthermore, the boss plate includes a horizontal end and a contact end, the horizontal end of the boss plate is connected to the side of the slider, and the contact end of the boss plate cooperates with the rolling element.

[0015] Furthermore, position sensors are provided at both ends of the rear comb plate and both ends of the front comb plate, and the position sensors are used to detect the position of the boss plate.

[0016] Furthermore, the detection end of the position sensor is located below the boss plate.

[0017] In a second aspect, a 3D printer is provided, comprising a printer body, an X-axis motion assembly, a Z-axis motion assembly and a hot bed motion frame are installed on the printer body, and a Y-axis motion assembly is installed on the top of the X-axis motion assembly; The hot bed motion frame is arranged in the middle of the printer body, and a heating device and the substrate as described above are installed on the top of the hot bed motion frame; The Z-axis motion assembly is connected to the heated bed motion frame and is used to drive the heated bed motion frame to move along the top or bottom of the printer body.

[0018] In a third aspect, a method for using a grid-type hot bed substrate is provided, wherein the method is performed using the substrate as described above, and comprises: Arranging a plurality of grid components on the top of the support body so that the platform formed by the plurality of grid components can hold the printed workpiece; Using a position sensor to detect an initial position of the pressing component, and determining a moving direction of the pressing component according to the detected initial position of the pressing component; The control device is operated to control the displacement of the pressing component, and the plurality of grid components are pressed downward in sequence, so that the tops of the plurality of grid components are separated from the printing workpiece.

[0019] Compared with the prior art, the present invention has the following beneficial effects: 1. By arranging multiple grid components at intervals on the top of the support body and positioning the grid components through the positioning components, each grid component forms a supporting platform between each other. During the workpiece printing process, the workpiece can be reliably supported to ensure that the workpiece surface is free of defects or damage; secondly, when the workpiece is printed, each grid component can be effectively separated from the bottom of the workpiece by using the cooperation of the guide component and the pressing component, so that the workpiece can be quickly removed from the top of the grid component, which not only improves the removal efficiency, but also avoids damage to the workpiece, and solves the technical defects of the existing large-scale 3D printer workpiece removal time and difficulty.

[0020] 2. By symmetrically installing the reset unit on the top of each grid plate, when a single grid plate is pressed down, it can quickly return to its working height to ensure the normal printing of subsequent workpieces. Secondly, the rolling parts arranged on the opposite sides of the grid plate cooperate with the pressing assembly, so that when the pressing assembly moves along the guide assembly and presses the grid assembly in turn, the rolling parts can roll smoothly, reducing energy loss and wear of mechanical parts, and extending the service life of the equipment.

[0021] 3. The selection of the reset unit can be determined according to the weight of the printed workpiece. When the printed workpiece is light, an elastic ball can be used as the reset unit; when the printed workpiece is heavy, a reset spring can be used for reset operation.

[0022] 4. Since different types of rolling parts have different service life and reliability, the use of bearing-operated rolling parts can ensure the reliability of rolling to a certain extent, while the use of rollers as rolling parts can extend the service life of the pressing assembly to a certain extent.

[0023] 5. By using a bidirectional synchronous motor to drive the pulley to drive the two sliders to slide on the guide rail, the synchronization of the sliding of the two sliders can be ensured, thereby improving the consistency and reliability of the separation of the grid assembly and the bottom of the workpiece.

[0024] 6. The horizontal end of the boss plate is connected to the side of the slider, ensuring the stable installation and precise positioning of the boss plate on the slider. When the slider slides on the guide rail, the boss plate can move with it and maintain the relative position unchanged, thereby ensuring the accuracy and consistency of the pressing component pressing on the grid component; the contact end of the boss plate cooperates with the rolling element, so that the pressing force can act directly and evenly on the rolling element, and its force uniformity directly affects the resetting effect of the grid component and the flatness of the printed workpiece. The contact end of the boss plate enables the pressing force to be more effectively transmitted to the grid component, thereby improving the pressing effect.

[0025] 7. Accurate position control contributes to production efficiency and accuracy. At the same time, accurate position control can also reduce the quality problems of printed workpieces caused by position deviation and improve the product qualification rate.

[0026] 8. Since the position sensor is directly installed under the boss plate, the position information of the boss plate can be obtained in real time and immediately fed back to the control device, which can quickly respond to position changes and adjust the operating status of the motor, thereby ensuring the accuracy and timeliness of the pressing operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 A schematic diagram of the operation of a grid-type hot bed substrate provided by the present invention; Figure 2 A side view of the grid-type hot bed substrate provided by the present invention; Figure 3 A schematic diagram of assembling a grid assembly and a supporting body in a grid-type hot bed substrate provided by the present invention; Figure 4 A side view of the grid assembly and the supporting body in the grid-type hot bed substrate provided by the present invention; Figure 5 A schematic diagram of the installation of the positioning components in the grid-type hot bed substrate provided by the present invention; Figure 6 A schematic diagram of the installation of the guide assembly in the grid-type hot bed substrate provided by the present invention; Figure 7 A top view of the installation of a pressing assembly in a grid-type hot bed substrate provided by the present invention; Figure 8 A schematic diagram of assembling the grid plates in the grid-type hot bed substrate provided by the present invention; Fig. 9 A schematic diagram of the structure of a grid plate in a grid-type hot bed substrate provided by the present invention; Fig.10 A cross-sectional view of the installation of a grid plate in a grid-type hot bed substrate provided by the present invention; Fig.11 A schematic diagram of the installation of a position sensor in a grid-type hot bed substrate provided by the present invention; Fig.12 A schematic diagram of the installation of a motor in a grid-type hot bed substrate provided by the present invention; Fig.13A schematic diagram of the installation of the boss plate in the grid-type hot bed substrate provided by the present invention; Fig.14 A schematic diagram of the structure of a grid plate in a grid-type hot bed substrate provided by the present invention; Fig.15 A schematic diagram of the supporting body structure in the grid-type hot bed substrate provided by the present invention; Fig.16 A bottom view of a boss plate in a grid-type hot bed substrate provided by the present invention; Fig.17 A schematic diagram of the structure of the rear comb plate in the grid-type hot bed substrate provided by the present invention; Fig.18 A schematic diagram of the structure of the front comb plate in the grid-type hot bed substrate provided by the present invention; Fig.19 A flow chart of a method for using a grid-type hot bed substrate provided by the present invention; Among them: 1. Printer body; 2. X-axis motion assembly; 3. Y-axis motion assembly; 4. Z-axis motion assembly; 5. Hot bed motion frame; 6. Loading platform; 7. Printing workpiece; 8. Support body; 9. Grid assembly; 9-1. Grid plate; 9-2. Reset unit; 9-3. Roller; 10. Rear comb plate; 11. Front comb plate; 12. Motor; 13. Pulley; 14. Drive belt; 15. Control device; 16. Position sensor; 17. Guide rail; 18. Slider; 19. Boss plate; 20. Drive shaft. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, 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 part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0032] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply 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. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0033] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0034] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] Current 3D printers, whether they are FDM (fused deposition modeling) 3D printers, SLA (stereolithography) 3D printers, or SLM (selective area sintering) 3D printers, apply a layer of platform glue on the substrate while the substrate is heated during the printing process in order to ensure the adhesion between the workpiece and the substrate and prevent the workpiece from warping and deforming. (This article uses FDM as an example to illustrate the problem) Due to the dual effects of platform glue and substrate heating, the 3D printer can maintain a fixed position and printing shape during the process of printing the workpiece. Each time a layer is printed, the substrate drops one layer. After multiple layers are stacked, the desired workpiece is finally formed. After printing is completed, the host control system turns off the heating unit of the substrate. After the substrate heating unit stops heating, the temperature of the substrate gradually decreases. Since the substrate has a certain temperature, the workpiece cannot be peeled off the hot bed. After a certain cooling time, the temperature drops to room temperature, but due to the effect of the platform glue, the workpiece still needs to be very difficult to peel off from the substrate.

[0036] The main methods adopted at this stage are: ①. The platform uses glass material as the substrate. Glue is applied and the glass substrate is heated during printing. After printing, it is forcibly peeled off with a scraper; ②. The platform uses a PEI magnetic film substrate adsorbed on the iron-based moving platform, and the platform is heated at the same time. After printing, the PEI magnetic film is removed and the workpiece is removed by bending; ③. Paper tape is pasted on the substrate. The paper tape is more sticky when heated. After printing is completed, the substrate is cooled down and the workpiece is scraped off with a scraper.

[0037] However, the above methods are mainly aimed at small workpieces printed by small desktop 3D printers. For large industrial machines, the printed workpieces are large, requiring high dimensional accuracy and no deformation of the appearance, and the workpieces must not be damaged when removed from the printer.

[0038] For the above reasons, large-scale 3D printers require the printed workpiece to have strong adhesion to the substrate during the printing process. However, due to the strong adhesion and large adhesion area of ​​large workpieces, it is difficult to remove them after printing. Violent removal methods can easily damage the workpiece and even further cause loss of workpiece precision. At the same time, the process of waiting for cooling also indirectly leads to a decrease in printing efficiency. Therefore, the contradiction between requiring strong adhesion during printing and requiring the adhesion to decrease rapidly or even disappear after printing has always existed in large-scale industrial 3D printers.

[0039] In summary, the current design of the printing substrate of large-scale 3D printers is extremely unreasonable and has major production defects.

[0040] In order to solve the above technical defects, the inventor provides a grid-type hot bed substrate, a 3D printer and a method.

[0041] The present invention is further described in detail below in conjunction with the accompanying drawings: like Figure 1-Figure 18 As shown, in a first aspect of an embodiment of the present invention, a grid-type hot bed substrate is provided, comprising a supporting body 8, such as Figure 3As shown, the support body 8 is a rectangular structure, and a grid component 9 is installed on the top of the support body 8, and a plurality of grid components 9 are arranged in sequence along the length direction of the support body 8, and a receiving platform 6 is formed between the plurality of grid components 9, and the receiving platform 6 is used to receive the printed workpiece 7; positioning components are installed on the opposite sides of the support body 8, and the positioning components are used to position the plurality of grid components 9 on the one hand so that the heights of the plurality of grid components are consistent, and on the other hand to enable the grid components 9 to maintain their initial state after being pressed and reset; a guide component is installed on the top of the two positioning components, and a pressing component is installed on the top of the guide component, and the guide component is used to provide a moving path for the pressing component so that the pressing component can be displaced along the side of the support body 8 and the plurality of grid components 9; a control device 15 is electrically connected to the pressing component, wherein, after the printing of the printed workpiece 7 is completed, the control device 15 is used to control the pressing component to displace along the length direction of the support body 8 through the positioning component, and press the plurality of grid components 9 downward in sequence, so that the top of the grid component 9 is separated from the bottom surface of the printed workpiece 7. During use, multiple grid components 9 are arranged in sequence on the top of the support body 8, and the grid components 9 are positioned by the positioning components, so that each grid component 9 forms a supporting platform 6 between each other. During the workpiece printing process, the printed workpiece 7 can be reliably supported to ensure that the surface of the printed workpiece 7 is free of defects or damage; secondly, when the printed workpiece 7 is printed, each grid component 9 can be effectively separated from the bottom of the workpiece by utilizing the cooperation of the guide component and the pressing component, so that the workpiece can be quickly removed from the top of the grid component 9, which not only improves the removal efficiency, but also avoids damage to the workpiece, solving the technical defects of the existing large-scale 3D printers, such as long workpiece removal time and great difficulty in removal.

[0042] like Figure 4-Figure 14As shown, the grid assembly 9 includes a grid plate 9-1, a reset unit 9-2 is symmetrically arranged at the bottom of the grid plate 9-1, and rolling members 9-3 are arranged on opposite sides of the grid plate 9-1; and positioning holes are provided at opposite ends of the top of the support body 8, and the reset unit 9-2 is installed in the positioning holes; the positioning assembly includes a rear comb plate 10 and a front comb plate 11, and the rear comb plate 10 and the front comb plate 11 are both provided with elliptical holes, and the end of the rolling member 9-3 extends outward through the elliptical holes to cooperate with the pressing assembly on the guide assembly. By symmetrically installing the reset unit 9-2 on the top of each grid plate 9-1, when a single grid plate 9-1 is pressed downward, it can quickly return to its working height, ensuring the normal printing of the subsequent printed workpiece 7. Secondly, the rolling elements 9-3 arranged on the two opposite sides of the grid plate 9-1 cooperate with the pressing assembly, so that when the pressing assembly moves along the guide assembly and presses the grid assembly 9 in turn, the rolling element 9-3 can roll smoothly, reducing energy loss and wear of mechanical parts, and extending the service life of the device. In one embodiment, the reset unit 9-2 is a reset spring, and in another embodiment, the reset unit 9-2 is an elastic ball. In one embodiment, the rolling element 9-3 is a bearing, and in another embodiment, the rolling element 9-3 is a roller. The selection of the reset unit 9-2 can be determined according to the weight of the printed workpiece 7. When the weight of the printed workpiece 7 is light, an elastic ball can be used as the reset unit 9-2; when the weight of the printed workpiece 7 is heavy, a reset spring can be used for the reset operation; due to the different types of rolling elements 9-3 The use cycle and reliability are different, the use of the bearing operation rolling element 9-3 can ensure the reliability of rolling to a certain extent, and the use of the roller as the rolling element 9-3 can extend the use cycle of the pressing assembly to a certain extent.

[0043] like Figure 4-Figure 18 As shown, the guide assembly includes a guide rail 17, which is installed on the side of the rear comb plate 10 and the front comb plate 11 away from the support body 8, and a slider 18 is slidably connected to the guide rail 17; the pressing assembly includes a motor 12, a pulley 13 and a boss plate 19, the motor 12 is preferably a bidirectional synchronous motor, installed at the end of the front comb plate 11, and located on one side of the support body 8, the pulley 13 is installed at both ends of the rear comb plate 10 and the front comb plate 11, and the pulleys 13 at both ends of the rear comb plate 10 and the front comb plate 11 are connected through a transmission The driving end of the motor 12 is connected to the pulley 13 on one end of the front comb plate 11, and the other end of the motor 12 is connected to the pulley 13 on one end of the rear comb plate 10 through the transmission shaft 20; the boss plate 19 is installed on the side of the slider 18, and the end of the boss plate 19 cooperates with the rolling element 9-3; by using a bidirectional synchronous motor to drive the pulley 13 to drive the two sliders 18 to slide on the guide rail 17, the synchronization of the sliding of the two sliders 18 can be ensured, and the consistency and reliability of the separation of the grid assembly 9 and the bottom of the printed workpiece 7 can be improved. Figure 12-16 As shown, the boss plate 19 includes a horizontal end and a contact end. The horizontal end of the boss plate 19 is connected to the side of the slider 18. The contact end of the boss plate 19 cooperates with the rolling element 9-3. Position sensors 16 are also provided at both ends of the rear comb plate 10 and the front comb plate 11. The position sensor 16 is used to detect the position of the boss plate 19. The detection end of the position sensor 16 is located below the boss plate 19. Accurate position control contributes to production efficiency and accuracy. At the same time, accurate position control can also reduce the quality problems of the printed workpiece 7 caused by position deviation and improve the qualified rate of the product. In addition, since the position sensor 16 is directly installed below the boss plate 19, the position information of the boss plate 19 can be obtained in real time and immediately fed back to the control device 15, which can quickly respond to position changes and adjust the operating state of the motor 12, thereby ensuring the accuracy and timeliness of the pressing operation.

[0044] In a second aspect of this embodiment, a 3D printer is provided. Figure 1 and Figure 2 As shown, the printer body 1 includes an X-axis motion assembly 2, a Z-axis motion assembly 4 and a hot bed motion frame 5, and a Y-axis motion assembly 3 is installed on the top of the X-axis motion assembly 2; the hot bed motion frame 5 is arranged in the middle of the printer body 1, and a heating device and the substrate as described above are installed on the top of the hot bed motion frame 5; the Z-axis motion assembly 4 is connected to the hot bed motion frame 5, and is used to drive the hot bed motion frame 5 to move along the top or bottom of the printer body 1. Since a grid-type hot bed substrate is installed on the hot bed motion frame 5 of the printer, after the printing of the printed workpiece 7 is completed, the printed workpiece 7 can be quickly removed from the top of the grid assembly 9, which not only improves the removal efficiency, but also avoids damage to the printed workpiece 7.

[0045] A third aspect of this embodiment provides a method for using a grid-type hot bed substrate, wherein the method is performed using the substrate as described above. Fig.19 As shown, including: S101. Arrange a plurality of grid components on the top of the support body so that the platform formed by the plurality of grid components can support the printed workpiece; illustratively, the support body 8 is a rectangular structure, the grid component 9 is installed on the top of the support body 8, and a plurality of grid components 9 are arranged in sequence along the length of the support body 8, and a supporting platform 6 is formed between the plurality of grid components 9, and the supporting platform 6 is used to support the printed workpiece 7.

[0046] S102, using the position sensor to detect the initial position of the pressing component, and determining the moving direction of the pressing component according to the detected initial position of the pressing component; illustratively, the control device 15 is used to rotate the motor 12 in a predetermined direction, and the signal of the position sensor 16 is collected at the same time, so as to determine the position of the boss plate 19. If the position sensors 16 at both the left and right ends cannot detect the boss plate 19, the position of the boss plate 19 is in the middle state; if the left position sensor 16 detects the boss plate 19, it means that the boss plate 19 is on the left side, and the boss plate 19 will move to the right in the next operation; if the right position sensor 16 detects the boss plate 19, it means that the boss plate 19 is on the right side, and the boss plate 19 will move to the left in the next operation. The position sensor 16 is preferably a proximity switch position sensor, which outputs a low level when the boss plate 19 does not move onto the position sensor 16, and outputs a high level when the boss plate 19 moves onto the position sensor 16, which provides the controller 15 with different positions of the boss plate 19, so that the controller 15 determines the operating status of the motor 12.

[0047] S103, the control device is operated to control the displacement of the pressing component, and the multiple grid components are pressed downward in sequence, so that the tops of the multiple grid components are separated from the printed workpiece. For example, when the 3D printed workpiece 7 is printed, the control device 15 receives the end printing signal sent by the 3D printer host. When the left position sensor 16 detects that the boss plate 19 is on the left, the control device 15 drives the motor 12 to drive the boss plate 19 to move to the right; as the boss plate 19 moves, the first grid component 9 on the left is pressed down by the boss plate 19, and as the boss plate 19 moves to the right, it returns to its initial position under the elastic force of the reset spring 9-2. At this time, the second grid component 9 on the left is pressed down, the boss plate 19 continues to move to the right, and the second grid component 9 on the left is released and returns to its initial position under the elastic force of the reset spring 9-2; and so on, until the boss plate 19 moves to the rightmost end and is detected by the rightmost position sensor 16. Each grid substrate component 9 is pressed down and released once; during the pressing action of the grid component 9, the 3D printed workpiece 7 and the part bonded to the pressed grid component 9 are separated. When all the grid components 9 are pressed down and released once, the grid components 9 will be peeled off from the 3D printed workpiece 7. Further, assuming that the adhesion force generated by the supporting platform 6 and the 3D printed workpiece 7 is F, the adhesion area is S, and the number of grid components 9 occupied by the adhesion area is n, then the adhesion force f generated by a single grid component 9 is 下 =F / n. At this time, the larger n is, the greater the adhesion f allocated to a single grid component 9 is. j When one of the grid components 9 is separated from the 3D printed workpiece 7, the remaining grid components 9 bear the role of supporting the remaining area of ​​the 3D printed workpiece 7, and the supporting force is f 上 =Ff下 =F , since the adhesion force generated by a single grid component 9 is f 下 is much smaller than f 上 From the above, it can be seen that the larger the number n of single grid components 9, the greater the f 下 The smaller it is, the easier it is to peel off.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit its protection scope. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that after reading the present invention, those skilled in the art can still make various changes, modifications or equivalent substitutions to the specific implementation methods of the invention, but these changes, modifications or equivalent substitutions are all within the protection scope of the pending claims of the invention.

Claims

1. A grid-type hot bed substrate, characterized in that: include: Support body (8); A grid assembly (9) is mounted on the top of the support body (8), and a plurality of grid assemblies (9) are sequentially arranged at intervals along the entire length of the support body (8); Positioning components, mounted on two opposite sides of the supporting body (8), and used for positioning the plurality of grid components (9); A guide assembly is installed on the positioning assembly, and a pressing assembly is installed on the top of the guide assembly; A control device (15) is electrically connected to the pressing component, wherein the control device (15) is used to control the pressing component to move along the length of the support body (8) through the positioning component, and to press the plurality of grid components (9) downward in sequence, so that the top of the grid component (9) is separated from the printed workpiece (7).

2. The substrate according to claim 1, characterized in that The grid assembly (9) comprises a grid plate (9-1), a reset unit (9-2) is symmetrically provided at the bottom of the grid plate (9-1), and rolling elements (9-3) are provided on opposite sides of the grid plate (9-1); Positioning holes are provided at two opposite ends of the top of the support body (8), and the reset unit (9-2) is installed in the positioning holes; The positioning assembly comprises a rear comb plate (10) and a front comb plate (11), each of which is provided with an elliptical hole, and the end of the rolling element (9-3) extends outward through the elliptical hole to cooperate with the pressing assembly on the guide assembly.

3. The substrate according to claim 2, characterized in that The reset unit (9-2) is a reset spring or an elastic ball.

4. The substrate according to claim 2, characterized in that The rolling element (9-3) is a bearing or a roller.

5. The substrate according to claim 2, characterized in that The guide assembly comprises a guide rail (17), the guide rail (17) being mounted on a side of the rear comb plate (10) and the front comb plate (11) away from the support body (8), and a slider (18) being slidably connected to the guide rail (17); The pressing assembly comprises a motor (12), a pulley (13) and a boss plate (19); the motor (12) is mounted on the end of the front comb plate (11) and is located on one side of the support body (8); the pulley (13) is mounted on both ends of the rear comb plate (10) and both ends of the front comb plate (11); The pulleys (13) at both ends of the rear comb plate (10) and the front comb plate (11) are connected via a transmission belt (14); the driving end of the motor (12) is connected to the pulley (13) at one end of the front comb plate (11); and the other end of the motor (12) is connected to the pulley (13) at one end of the rear comb plate (10) via a transmission shaft (20); The boss plate (19) is mounted on the side of the slider (18), and the end of the boss plate (19) cooperates with the rolling element (9-3).

6. The substrate according to claim 5, characterized in that The boss plate (19) comprises a horizontal end and a contact end, the horizontal end of the boss plate (19) is connected to the side of the slider (18), and the contact end of the boss plate (19) cooperates with the rolling element (9-3).

7. The substrate according to claim 5, characterized in that Position sensors (16) are also provided at both ends of the rear comb plate (10) and both ends of the front comb plate (11), and the position sensors (16) are used to detect the position of the boss plate (19).

8. The substrate according to claim 7, characterized in that The detection end of the position sensor (16) is located below the boss plate (19).

9. A 3D printer, characterized in that: The printer comprises a printer body (1), on which an X-axis motion component (2), a Z-axis motion component (4) and a hot bed motion frame (5) are mounted, and a Y-axis motion component (3) is mounted on the top of the X-axis motion component (2); The hot bed motion frame (5) is arranged in the middle of the printer body (1), and a heating device and a substrate according to any one of claims 1 to 8 are installed on the top of the hot bed motion frame (5); The Z-axis motion component (4) is connected to the hot bed motion frame (5) and is used to drive the hot bed motion frame (5) to move along the top or bottom of the printer body.

10. A method for using a grid-type hot bed substrate, characterized in that: The method is carried out using the substrate according to any one of claims 1 to 8, comprising: Arranging a plurality of grid components on the top of the support body so that the platform formed by the plurality of grid components can hold the printed workpiece; Using a position sensor to detect an initial position of the pressing component, and determining a moving direction of the pressing component according to the detected initial position of the pressing component; The control device is operated to control the displacement of the pressing component, and the plurality of grid components are pressed downward in sequence, so that the tops of the plurality of grid components are separated from the printing workpiece.

Images