A grid format hot bed substrate, 3D printer and method

Abstract

The application discloses a grid format hot bed substrate, a 3D printer and a method, and the substrate comprises a support body, a grid assembly is installed on the top of the support body and is sequentially and spacedly arranged along the length direction of the support body, a positioning assembly is installed on the opposite sides of the support body and is used for positioning the plurality of grid assemblies, a guide assembly is installed on the positioning assembly, a pressing assembly is installed on the top of the guide assembly, and a control device is electrically connected with the pressing assembly, wherein the control device is used for controlling the pressing assembly to displace along the length direction of the support body through the positioning assembly, and simultaneously pressing the plurality of grid assemblies downwards in sequence, so that the top of the grid assembly is separated from a printing workpiece. After the workpiece is printed, the cooperation of the guide assembly and the pressing assembly can effectively separate each grid assembly from the bottom of the workpiece, and the workpiece can be quickly removed from the top of the grid assembly, thereby improving the removal efficiency and avoiding damage to the workpiece.

Description

Technical Field

[0001] This invention belongs to the field of 3D printing technology, specifically relating to a grid-type heated bed substrate, a 3D printer, and a method. Background Technology

[0002] Current 3D printers, whether FDM (Fused Deposition Modeling), SLA (Stereolithography), or SLM (Selective Laminate Printing), apply a layer of platform adhesive to the substrate while it is being heated during the printing process to ensure adhesion between the workpiece and the substrate and to prevent warping or deformation. This article uses FDM as an example to illustrate this issue.

[0003] Thanks to the combined effect of the platform adhesive and the substrate heating, the 3D printer maintains a fixed position and printing shape during the printing process. With each layer printed, the substrate descends one layer, and after multiple layers are stacked, the desired workpiece is finally formed. After printing is complete, the host control system shuts down the substrate heating unit. After the heating unit stops heating, the substrate temperature gradually decreases. Due to the substrate's inherent temperature, the workpiece cannot be peeled off the heated bed. After a certain cooling time, the temperature drops to room temperature, but due to the effect of the platform adhesive, the workpiece still requires considerable effort to peel off from the substrate.

[0004] The main methods currently used are: ① Using glass as the substrate for the platform, applying glue and heating the glass substrate during printing, and then forcibly peeling it off with a scraper after printing; ② Using a PEI magnetic film substrate attached to an iron-based moving platform, while heating the platform, and then removing the PEI magnetic film and bending it to remove the workpiece after printing; ③ Pasting paper tape on the substrate, which has strong adhesion when heated, and then scraping the workpiece off with a scraper after printing when the substrate cools down.

[0005] However, the methods mentioned above are mainly for printing small workpieces with small desktop 3D printers. For large industrial machines, the printed workpieces are large, requiring high dimensional accuracy, no deformation in appearance, and the workpiece must not be damaged when removed from the printer.

[0006] For the reasons mentioned above, large-scale 3D printers require strong adhesion between the printed workpiece and 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. Forceful removal can easily damage the workpiece, potentially leading to a loss of precision. Furthermore, the cooling process indirectly reduces printing efficiency. Therefore, the contradiction between requiring strong adhesion during printing and the need for rapid reduction or even disappearance of adhesion after printing has always existed in large-scale industrial 3D printers.

[0007] In conclusion, the current design of the printing substrate for large-scale 3D printers is extremely unreasonable and has significant production defects. Summary of the Invention

[0008] The purpose of this invention is to provide a grid-type heated bed substrate, a 3D printer, and a method to solve the technical defects of existing large industrial 3D printers, such as long workpiece removal time and high removal difficulty after printing.

[0009] To achieve the above objectives, the present invention employs the following technical solution:

[0010] In a first aspect, a grid-type heated bed substrate is provided, comprising:

[0011] Supporting entity;

[0012] A grid assembly is installed on the top of the support body, and multiple such assemblies are arranged at intervals along the length of the support body.

[0013] Positioning components are installed on opposite sides of the support body and are used to position the plurality of grid components;

[0014] A guide component is mounted on the positioning component, and a pressing component is mounted on the top of the guide component;

[0015] A 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 of the support body through the positioning assembly, while pressing down the plurality of grid assemblies in sequence, so that the top of the grid assembly is separated from the printed workpiece.

[0016] Furthermore, the grid assembly includes a grid plate, the bottom of which is symmetrically provided with reset units, and the grid plate has rolling elements on opposite sides;

[0017] The top of the support body has positioning holes at opposite ends, and the reset unit is installed in the positioning holes;

[0018] The positioning component includes a rear comb plate and a front comb plate, both of which have elliptical holes. The end of the rolling element extends outward through the elliptical holes to cooperate with the pressing component on the guide component.

[0019] Furthermore, the reset unit is a reset spring or a ball spring.

[0020] Furthermore, the rolling element is a bearing or a roller.

[0021] Furthermore, the guide assembly includes a guide rail, which is mounted on the side of the rear comb plate and the front comb plate away from the support body, and a slider is slidably connected to the guide rail;

[0022] The pressing assembly includes a motor, pulleys, and a boss plate. The motor is installed at the end of the front comb plate and is located on one side of the support body. The pulleys are installed at both ends of the rear comb plate and both ends of the front comb plate.

[0023] The pulleys on both ends of the rear comb plate and both ends of the front comb plate are connected by a transmission belt. The drive 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.

[0024] The boss plate is mounted on the side of the slider, and the end of the boss plate mates with the rolling element.

[0025] 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.

[0026] 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.

[0027] Furthermore, the detection end of the position sensor is located below the boss plate.

[0028] Secondly, a 3D printer is provided, including a printer body, on which an X-axis motion component, a Z-axis motion component and a heated bed motion frame are mounted, and a Y-axis motion component is mounted on top of the X-axis motion component.

[0029] The heated bed motion frame is located in the middle of the printer body, and a heating device and the base plate as described above are installed on the top of the heated bed motion frame.

[0030] The Z-axis motion component 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.

[0031] Thirdly, a method for using a grid-type heated bed substrate is provided, the method being performed using the substrate described above, comprising:

[0032] Multiple grid components are arranged on the top of the support body so that the platform formed by the multiple grid components can hold the printed workpiece;

[0033] Using a position sensor, the initial position of the pressing component is detected, and the direction of movement of the pressing component is determined based on the detected initial position of the pressing component.

[0034] The control device controls the displacement of the pressing component, pressing multiple grid components downwards in sequence to separate the tops of the multiple grid components from the printed workpiece.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] 1. By sequentially and spaced multiple grid components on the top of the support body and positioning them using positioning components, each grid component forms a support platform. During the workpiece printing process, this provides reliable support for the workpiece, ensuring that the workpiece surface is free of defects or damage. Secondly, after the workpiece printing is complete, the cooperation of the guide and pressing components allows each grid component to be effectively separated from the bottom of the workpiece, enabling the workpiece to be quickly removed from the top of the grid components. This improves removal efficiency and avoids damage to the workpiece, solving the technical shortcomings of existing large-scale 3D printers, such as long removal time and high removal difficulty.

[0037] 2. By symmetrically installing reset units on the top of each grid plate, when a single grid plate is pressed down, it can quickly return to its working height, ensuring normal printing of subsequent workpieces. Secondly, the rolling elements on opposite sides of the grid plates cooperate with the pressing assembly, allowing the rolling elements to roll smoothly as the pressing assembly moves along the guide assembly and presses the grid components sequentially. This reduces energy loss and wear on mechanical parts, extending the equipment's service life.

[0038] 3. The choice of reset unit can be determined based on the weight of the printed workpiece. When the printed workpiece is relatively light, a spring ball can be used as the reset unit; when the printed workpiece is relatively heavy, a reset spring can be used for the reset operation.

[0039] 4. Since different types of rolling elements have different service life and reliability, using bearings as rolling elements can ensure the reliability of rolling to a certain extent, while using rollers as rolling elements can extend the service life of the pressing component to a certain extent.

[0040] 5. By using a bidirectional synchronous motor to drive the pulley to move the two sliders on the guide rail, the synchronization of the two sliders can be ensured, improving the consistency and reliability of the separation of the grid assembly from the bottom of the workpiece.

[0041] 6. The horizontal end of the boss plate is connected to the side of the slider, ensuring 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 accordingly and maintain a constant relative position, thus ensuring the accuracy and consistency of the pressing component's pressing on the grid component. The contact end of the boss plate cooperates with the rolling element, allowing the pressing force to be applied directly and evenly to the rolling element. The uniformity of the force directly affects the reset effect of the grid component and the flatness of the printed workpiece. The contact end of the boss plate allows the pressing force to be transmitted to the grid component more effectively, improving the pressing effect.

[0042] 7. Precise position control contributes to production efficiency and accuracy. At the same time, precise position control can also reduce print quality problems caused by positional deviations and improve the product qualification rate.

[0043] 8. Since the position sensor is directly installed under the boss plate, it can obtain the position information of the boss plate in real time and immediately feed it back to the control device. It can quickly respond to position changes and adjust the operating status of the motor, thereby ensuring the accuracy and timeliness of the pressing operation. Attached Figure Description

[0044] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 This is a schematic diagram of the operation of the grid-type heated bed substrate provided by the present invention;

[0046] Figure 2 This is a side view of the grid-type heated bed substrate provided by the present invention.

[0047] Figure 3 This is a schematic diagram of the assembly of the grid assembly and the support body in the grid-type heated bed substrate provided by the present invention;

[0048] Figure 4 This is a side view of the grid assembly and support body assembled in the grid-type heated bed substrate provided by the present invention;

[0049] Figure 5 This is a schematic diagram of the installation of the positioning component in the grid-type heated bed substrate provided by the present invention;

[0050] Figure 6 This is a schematic diagram of the installation of the guide assembly in the grid-type heated bed substrate provided by the present invention;

[0051] Figure 7 This is a top view of the pressing assembly installed in the grid-type heated bed substrate provided by the present invention;

[0052] Figure 8 This is a schematic diagram of the grid plate assembly in the grid-type heated bed substrate provided by the present invention;

[0053] Figure 9 This is a schematic diagram of the grid plate structure in the grid-type heated bed substrate provided by the present invention;

[0054] Figure 10 This is a cross-sectional view of the grid plate installation in the grid-type heated bed substrate provided by the present invention;

[0055] Figure 11 This is a schematic diagram of the position sensor installation in the grid-type heated bed substrate provided by the present invention;

[0056] Figure 12 This is a schematic diagram of motor mounting in the grid-type heated bed substrate provided by the present invention;

[0057] Figure 13 This is a schematic diagram of the boss plate installation in the grid-type heated bed substrate provided by the present invention;

[0058] Figure 14 This is a schematic diagram of the grid plate structure in the grid-type heated bed substrate provided by the present invention;

[0059] Figure 15 This is a schematic diagram of the supporting main structure in the grid-type heated bed substrate provided by the present invention;

[0060] Figure 16 A bottom view of the boss plate in the grid-type heated bed substrate provided by the present invention;

[0061] Figure 17 This is a schematic diagram of the rear comb plate structure in the grid-type heated bed substrate provided by the present invention;

[0062] Figure 18 This is a schematic diagram of the front comb plate structure in the grid-type heated bed substrate provided by the present invention;

[0063] Figure 19 A flowchart illustrating the method of using the grid-type heated bed substrate provided by the present invention;

[0064] The components include: 1. Printer body; 2. X-axis motion assembly; 3. Y-axis motion assembly; 4. Z-axis motion assembly; 5. Heated bed motion frame; 6. Support platform; 7. Printed workpiece; 8. Support body; 9. Grid assembly; 9-1. Grid plate; 9-2. Reset unit; 9-3. Rolling element; 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 Implementation

[0065] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0066] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0067] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0068] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0069] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0070] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0071] Current 3D printers, whether FDM (Fused Deposition Modeling), SLA (Stereolithography), or SLM (Selective Laminate Printing), apply a layer of platform adhesive to the substrate while it is being heated during the printing process to ensure adhesion between the workpiece and the substrate and to prevent warping or deformation. (This article uses FDM as an example to illustrate the issue.)

[0072] Thanks to the combined effect of the platform adhesive and the substrate heating, the 3D printer maintains a fixed position and printing shape during the printing process. With each layer printed, the substrate descends one layer, and after multiple layers are stacked, the desired workpiece is finally formed. After printing is complete, the host control system shuts down the substrate heating unit. After the heating unit stops heating, the substrate temperature gradually decreases. Due to the substrate's inherent temperature, the workpiece cannot be peeled off the heated bed. After a certain cooling time, the temperature drops to room temperature, but due to the effect of the platform adhesive, the workpiece still requires considerable effort to peel off from the substrate.

[0073] The main methods currently used are: ① Using glass as the substrate for the platform, applying glue and heating the glass substrate during printing, and then forcibly peeling it off with a scraper after printing; ② Using a PEI magnetic film substrate attached to an iron-based moving platform, while heating the platform, and then removing the PEI magnetic film and bending it to remove the workpiece after printing; ③ Pasting paper tape on the substrate, which has strong adhesion when heated, and then scraping the workpiece off with a scraper after printing when the substrate cools down.

[0074] However, the methods mentioned above are mainly for printing small workpieces with small desktop 3D printers. For large industrial machines, the printed workpieces are large, requiring high dimensional accuracy, no deformation in appearance, and the workpiece must not be damaged when removed from the printer.

[0075] For the reasons mentioned above, large-scale 3D printers require strong adhesion between the printed workpiece and 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. Forceful removal can easily damage the workpiece, potentially leading to a loss of precision. Furthermore, the cooling process indirectly reduces printing efficiency. Therefore, the contradiction between requiring strong adhesion during printing and the need for rapid reduction or even disappearance of adhesion after printing has always existed in large-scale industrial 3D printers.

[0076] In conclusion, the current design of the printing substrate for large-scale 3D printers is extremely unreasonable and has significant production defects.

[0077] To address the aforementioned technical deficiencies, the inventors have provided a grid-type heated bed substrate, a 3D printer, and a method.

[0078] The present invention will now be described in further detail with reference to the accompanying drawings:

[0079] like Figures 1-18 As shown, in a first aspect of the present invention, a grid-type heated bed substrate is provided, including a support body 8, as shown in the figure. Figure 3As shown, the support body 8 is a rectangular structure. Grid components 9 are installed on the top of the support body 8, and multiple grid components 9 are arranged at intervals along the length of the support body 8. A supporting platform 6 is formed between the multiple grid components 9, which is used to support the printed workpiece 7. Positioning components are installed on opposite sides of the support body 8. These positioning components are used to position the multiple grid components 9 to ensure they are at the same height, and also to ensure that the grid components 9 maintain their initial state after being pressed and reset. Guide components are installed on top of the two positioning components, and pressing components are installed on top of the guide components. The guide components provide a movement path for the pressing components, allowing them to move along the sides of the support body 8 and the multiple grid components 9. A control device 15 is electrically connected to the pressing components. After the printed workpiece 7 is printed, the control device 15 controls the pressing components to move along the length of the support body 8 via the positioning components while simultaneously pressing the multiple grid components 9 downwards in sequence, so that the top of the grid components 9 separates from the bottom surface of the printed workpiece 7. During use, multiple grid components 9 are sequentially spaced on the top of the support body 8, and the grid components 9 are positioned by the positioning component, so that each grid component 9 forms a supporting platform 6. During the workpiece printing process, the printed workpiece 7 can be reliably supported, ensuring that the surface of the printed workpiece 7 is free of defects or damage. Secondly, after the printed workpiece 7 is printed, the guide component and the pressing component work together to effectively separate each grid component 9 from the bottom of the workpiece, so that the workpiece can be quickly removed from the top of the grid component 9. This improves the removal efficiency and avoids damage to the workpiece, solving the technical defects of long workpiece removal time and high removal difficulty in existing large 3D printers.

[0080] like Figures 4-14As shown, the grid assembly 9 includes a grid plate 9-1, with reset units 9-2 symmetrically arranged at the bottom of the grid plate 9-1, and rolling elements 9-3 arranged on opposite sides of the grid plate 9-1. Positioning holes are provided at opposite ends of the top of the support body 8, and the reset units 9-2 are installed in these positioning holes. The positioning assembly includes a rear comb plate 10 and a front comb plate 11, both of which have elliptical holes. The ends of the rolling elements 9-3 extend outward through the elliptical holes to engage with the pressing components on the guide assembly. By symmetrically installing reset units 9-2 on the top of each grid plate 9-1, when a single grid plate 9-1 is pressed downwards, it can quickly return to its working height, ensuring the normal printing of subsequent printed workpieces 7. Secondly, the rolling elements 9-3 arranged on opposite sides of the grid plate 9-1 cooperate with the pressing assembly, allowing the rolling elements 9-3 to roll smoothly when the pressing assembly moves along the guide assembly and presses the grid assembly 9 in sequence. This reduces energy loss and wear of mechanical parts, extending the service life of the equipment. In one embodiment, the reset unit 9-2 is a reset spring; in another embodiment, it is a ball. In one embodiment, the rolling element 9-3 is a bearing; in another embodiment, it is a roller. The selection of the reset unit 9-2 can be determined based on the weight of the printed workpiece 7. When the printed workpiece 7 is relatively light, a ball can be used as the reset unit 9-2; when the printed workpiece 7 is relatively heavy, a reset spring can be used for the reset operation. Since different types of rolling elements 9-3 have different service lives and reliability, using a bearing to operate the rolling element 9-3 can ensure the reliability of rolling to a certain extent, while using a roller as the rolling element 9-3 can extend the service life of the pressing assembly to a certain extent.

[0081] like Figures 4-18 As shown, the guiding assembly includes a guide rail 17, which is mounted on the side of the rear comb plate 10 and the front comb plate 11 away from the supporting body 8. A slider 18 is slidably connected to the guide rail 17. The pressing assembly includes a motor 12, pulleys 13, and a boss plate 19. The motor 12 is preferably a bidirectional synchronous motor, mounted at the end of the front comb plate 11 and located on one side of the supporting body 8. The pulleys 13 are mounted at both ends of the rear comb plate 10 and both ends of the front comb plate 11. The pulleys 13 on both ends of the rear comb plate 10 and both ends of the front comb plate 11 are connected by a transmission mechanism. A drive belt 14 is connected to the drive end of the motor 12, which is connected to the pulley 13 on one end of the front comb plate 11. The other end of the motor 12 is connected to the pulley 13 on one end of the rear comb plate 10 via a transmission shaft 20. A boss plate 19 is mounted on the side of the slider 18, and the end of the boss plate 19 mates 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, improving the consistency and reliability of the separation between the grid assembly 9 and the bottom of the printed workpiece 7. Figures 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, and 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 both ends of the front comb plate 11. The position sensors 16 are used to detect the position of the boss plate 19, and the detection end of the position sensor 16 is located below the boss plate 19. Precise position control contributes to production efficiency and accuracy. Furthermore, precise position control can reduce quality problems of the printed workpiece 7 caused by positional deviations, improving the product qualification rate. Moreover, since the position sensor 16 is directly installed below the boss plate 19, it can acquire the position information of the boss plate 19 in real time and immediately feed it back to the control device 15, enabling rapid response to position changes and adjustment of the motor 12's operating state, thereby ensuring the accuracy and timeliness of the pressing operation.

[0082] A second aspect of this embodiment provides a 3D printer, such as... Figure 1 and Figure 2 As shown, the printer includes a printer body 1, on which an X-axis motion assembly 2, a Z-axis motion assembly 4, and a heated bed motion frame 5 are mounted. A Y-axis motion assembly 3 is mounted on top of the X-axis motion assembly 2. The heated bed motion frame 5 is located in the middle of the printer body 1, and a heating device and the substrate described above are mounted on top of the heated bed motion frame 5. The Z-axis motion assembly 4 is connected to the heated bed motion frame 5 and is used to drive the heated bed motion frame 5 to move along the top or bottom of the printer body 1. Because the heated bed motion frame 5 of this printer is equipped with a grid-type heated bed substrate, after the printed workpiece 7 is printed, the printed workpiece 7 can be quickly removed from the top of the grid assembly 9, which improves the removal efficiency and avoids damage to the printed workpiece 7.

[0083] A third aspect of this embodiment provides a method for using a grid-type heated bed substrate, the method being performed using the substrate described above, such as... Figure 19 As shown, it includes:

[0084] S101. Multiple grid components are arranged on the top of the support body so that the platform formed by the multiple grid components can hold the printed workpiece; for example, the support body 8 is a rectangular structure, and the grid components 9 are installed on the top of the support body 8 and multiple grid components 9 are arranged at intervals along the length of the support body 8. The multiple grid components 9 form a holding platform 6, which is used to hold the printed workpiece 7.

[0085] S102. Using a position sensor, the initial position of the pressing component is detected, and the moving direction of the pressing component is determined based on the detected initial position. For example, the motor 12 is rotated in a predetermined direction by the control device 15, and the signal from the position sensor 16 is collected to determine the position of the boss plate 19. If neither the left nor the right position sensor 16 can 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, 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, 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. When the boss plate 19 does not move onto the position sensor 16, it outputs a low level, and when the boss plate 19 moves onto the position sensor 16, it outputs a high level. It provides the control device 15 with different positions of the boss plate 19, so that the control device 15 can determine the operating status of the motor 12.

[0086] S103. The control device controls the displacement of the pressing components, pressing multiple grid components downwards sequentially to separate the tops of the multiple grid components from the printed workpiece. For example, after the 3D printed workpiece 7 is completed, the control device 15 receives a stop printing signal from 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 move the boss plate 19 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. As the boss plate 19 moves to the right, it returns to its initial position under the elastic force of the return 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, returning to its initial position under the elastic force of the return spring 9-2; this process continues until the boss plate 19 moves to the rightmost end and is detected by the rightmost position sensor 16. Each grid component 9 is pressed down and released once. During the pressing action of the grid component 9, the part bonded to the 3D printed workpiece 7 and the pressed grid component 9 is separated. When all the grid components 9 have been pressed down and released once, the grid component 9 will peel off from the 3D printed workpiece 7. Furthermore, let the adhesion force between the support platform 6 and the 3D printed workpiece 7 be F, its adhesion area be S, and the number of grid components 9 occupying this adhesion area be n. Then the adhesion force f generated by a single grid component 9 is... 下 =F / n. At this point, the larger n is, the greater the adhesion force f allocated to a single grid component 9. j The smaller the value, the better. When one of the grid components 9 separates from the 3D printed workpiece 7, the remaining grid components 9 take on the role of supporting the remaining area of ​​the 3D printed workpiece 7, and the magnitude of its supporting force is f. 上 =Ff下 =F The adhesion force generated by a single grid component 9 is f 下 The value is much smaller than f 上 As can be seen from the above, the larger the number n of a single grid component 9, the more f 下 The smaller it is, the easier it is to peel off.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit its scope of protection. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that after reading the present invention, they can still make various changes, modifications or equivalent substitutions to the specific implementation of the invention, but these changes, modifications or equivalent substitutions are all within the scope of protection of the pending claims of the invention.

Claims

1. A grid format hot bed substrate, characterized by, The utility model relates to a printing workpiece separating device, including: Supporting body (8); Grid assembly (9) is installed to the top of supporting body (8), and a plurality of are sequentially arranged along the length direction of supporting body (8) in interval; Positioning assembly is installed to the opposite two sides of supporting body (8), is used for positioning a plurality of grid assembly (9); Guide assembly is installed to positioning assembly, and the top of guide assembly is installed with press assembly; Control device (15) is electrically connected with press assembly, wherein control device (15) is used for controlling press assembly to displace along the length direction of supporting body (8) through positioning assembly, and a plurality of grid assembly (9) is sequentially pressed down, to make grid assembly (9) top and printing workpiece (7) separate; The grid assembly (9) includes a grid plate (9-1), and the bottom of the grid plate (9-1) is symmetrically provided with a reset unit (9-2), and the opposite sides of the grid plate (9-1) are provided with rolling elements (9-3). The opposite ends of the top of the supporting body (8) are provided with positioning holes, and the reset unit (9-2) is installed in the positioning hole. The positioning assembly includes a rear comb-shaped plate (10) and a front comb-shaped plate (11), and the rear comb-shaped plate (10) and the front comb-shaped plate (11) are provided with oval holes, and the ends of the rolling elements (9-3) extend outward through the oval holes to cooperate with the press assembly on the guide assembly. The guide assembly includes a guide rail (17), and the guide rail (17) is installed on the side of the rear comb-shaped plate (10) and the front comb-shaped plate (11) away from the supporting body (8), and the guide rail (17) is slidably connected with a sliding block (18). The press assembly includes a motor (12), a belt pulley (13), and a boss plate (19), the motor (12) is installed at the end of the front comb-shaped plate (11) and located on one side of the supporting body (8), the belt pulley (13) is installed on both ends of the rear comb-shaped plate (10) and both ends of the front comb-shaped plate (11). The belt pulleys (13) on the two ends of the rear comb-shaped plate (10) and the two ends of the front comb-shaped plate (11) are connected by a transmission belt (14), the driving end of the motor (12) is connected with the belt pulley (13) on one end of the front comb-shaped plate (11), and the other end of the motor (12) is connected with the belt pulley (13) on one end of the rear comb-shaped plate (10) through a transmission shaft (20). The boss plate (19) is installed on the side surface of the sliding block (18), and the end of the boss plate (19) cooperates with the rolling element (9-3).

2. The substrate of claim 1, wherein The reset unit (9-2) is a reset spring or a spring ball.

3. The substrate of claim 1, wherein The rolling element (9-3) is a bearing or a roller.

4. The substrate of claim 1, wherein The boss plate (19) includes a horizontal end and a contact end, the horizontal end of the boss plate (19) is connected with the side surface of the sliding block (18), and the contact end of the boss plate (19) cooperates with the rolling element (9-3).

5. The substrate of claim 1, wherein The rear comb-shaped plate (10) and the front comb-shaped plate (11) are also provided with a position sensor (16), and the position sensor (16) is used for detecting the position of the boss plate (19).

6. The substrate of claim 5, wherein, The detection end of the position sensor (16) is located below the boss plate (19).

7. A 3D printer characterized by, The printer body (1) is provided with an X-axis movement assembly (2), a Z-axis movement assembly (4) and a hot bed movement frame (5), the top of the X-axis movement assembly (2) is provided with a Y-axis movement assembly (3); The hot bed movement frame (5) is arranged in the middle of the printer body (1), the top of the hot bed movement frame (5) is provided with a heating device and the base plate of any one of claims 1-6; The Z-axis movement assembly (4) is connected with the hot bed movement frame (5) and is used for driving the hot bed movement frame (5) to displace along the top or bottom of the printer body (1).

8. A method for using a grid pattern hot bed substrate, characterized by, The method is carried out by using the base plate of any one of claims 1-6, comprising: A plurality of grid assemblies are arranged on the top of the support body, so that the platform formed between the plurality of grid assemblies can hold the printing workpiece; A position sensor is used to detect the initial position of the pressing assembly, and the moving direction of the pressing assembly is determined according to the detected initial position of the pressing assembly; The control device is controlled to displace the pressing assembly, and the plurality of grid assemblies are pressed downward in sequence, so that the top of the plurality of grid assemblies is separated from the printing workpiece.

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