Automatic mold taking machine of 3D printer

Abstract

The invention relates to the technical field of 3D printing, and discloses an automatic mold taking machine of a 3D printer, which comprises a bottom plate, synchronous rotating belts are arranged on the two sides of the bottom plate, magnetic suction devices are uniformly distributed on the outer sides of the belts, a forming base plate in magnetic suction connection with the magnetic suction devices is placed on the belts, and the automatic mold taking machine further comprises a jacking mechanism, a supporting mechanism and an angle deflection mechanism; the supporting mechanisms are arranged on the two sides of the bottom plate and used for supporting and guiding the belt, and each supporting mechanism comprises a supporting frame fixed to the side edge of the bottom plate and a supporting roller rotationally installed on the supporting frame and matched with the inner side face of the belt; the jacking mechanism is arranged at the end of the bottom plate and used for jacking one end of the forming base plate placed on the printing platform of the 3D printer away. Through cooperation of the magnetic attraction belt, the jacking mechanism and the angle deflection mechanism, lossless and stable handover and reliable transmission of the formed base plate are achieved, and automation of the whole 3D printing mold taking process is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of 3D printing technology, and particularly relates to an automatic mold taking machine of a 3D printer. BACKGROUND

[0002] Additive manufacturing, commonly known as 3D printing, is a revolutionary technology in the manufacturing field, and its core principle is based on the discrete-accumulation idea. A three-dimensional model is sliced into continuous two-dimensional thin layers, and a special device is used to lay and bond the specific materials such as powder, wire or liquid layer by layer, and finally to accumulate a precise three-dimensional entity workpiece. Due to its unique advantages in complex structure forming, personalized customization and rapid prototyping, the technology has been widely used in industrial design, medical assistance, education and scientific research, and civilian creation and many other fields. In a typical 3D printing process, the printed product is manufactured on a plane called a printing platform or a forming substrate; when the printing task is completed, a crucial post-processing step is to separate and take off the solidified formed workpiece from the platform. This process is commonly referred to as "mold taking" or "demolding" in the industry. The successful completion of this step is a prerequisite for subsequent printing operations or further processing of the workpiece, and its efficiency and quality directly affect the continuity of the entire manufacturing cycle and the yield of the final product.

[0003] However, in the current technical situation, especially in the vast market of civilian and desktop 3D printing equipment, the mold taking operation still highly depends on manual operation. The operator needs to use tools such as shovels and scrapers to manually pry the workpiece off the printing platform after the printing task is completed. This traditional mode has a series of inherent technical defects and limitations that need to be solved. First, the 3D printing process usually takes a long time, from several hours to several tens of hours, and often needs to be run continuously without interruption. This requires the operator to accurately estimate the completion time of the printing and to be on duty throughout the process, or to arrange special personnel on shift, which causes a serious waste of human resources, significantly increases the labor cost and the complexity of operation and management, and also makes it difficult to realize truly "unmanned" intelligent manufacturing process. Therefore, developing a special auxiliary device that can be efficiently integrated with the 3D printer, automatically perform the mold taking action after the printing is completed, and ensure the stability of the mold taking process and the non-damage to the workpiece, has become an urgent need to break through the bottleneck of the existing technology and improve the overall automation level and production efficiency of the 3D printing equipment. SUMMARY

[0004] The present application aims to provide an automatic mold taking machine of a 3D printer to solve the technical problem that the mold cannot be taken automatically in the prior art.

[0005] The utility model provides an automatic mould taking -out machine of 3D printer, including the bottom plate, both sides of bottom plate are provided with synchronous rotation's belt, the outside of belt is evenly distributed with magnetic attraction device, the belt is placed with the forming base plate that is connected with magnetic attraction device magnetic attraction, still include jacking mechanism, support mechanism and angle deflection mechanism, support mechanism sets up in both sides of bottom plate for supporting and guiding belt, and support mechanism includes the support frame fixed in the side of bottom plate, and the support roller that rotates and installs on support frame with the inside surface cooperation of belt, jacking mechanism sets up in the end of bottom plate for the end of forming base plate that is placed on the printing platform of 3D printer is lifted, angle deflection mechanism sets up on the support frame close to the side of jacking mechanism, for driving the belt of this side to carry out lifting and lowering movement.

[0006] As a preferred technical solution of the present application, the angle deflection mechanism includes a deflection arm rotatably connected to the middle of the support frame, the distal end of the deflection arm is rotatably connected with a deflection wheel cooperating with the inner side of the belt, and the inside of the support frame is provided with a deflection driving device for driving the deflection arm to rotate. The middle of the deflection arm is provided with a connecting rod, the deflection driving device is a linear actuator, the cylinder of the deflection driving device is rotatably connected with the support frame, the end of the piston rod of the deflection driving device is rotatably connected with the connecting rod, and a pair of limiting protrusions are further provided on the support frame for contacting the two sides of the deflection arm respectively when the deflection arm rotates to limit the limit position of the deflection wheel lifting, when the deflection wheel is at the highest position, the height of the belt segment supported by the top of the deflection wheel is lower than the height of the belt segment supported by the support roller.

[0007] As a preferred technical solution of the present application, the jacking mechanism includes a jacking driving device provided at the end of the bottom plate, the piston rod of the jacking driving device is connected to the middle of the drag rod, the two sides of the jacking driving device are provided with sliding sleeves connected with the bottom plate, the sliding sleeves are slidingly connected with sliding rods fixedly connected with the drag rod, when the jacking driving device drives the drag rod to rise to the highest position, the drag rod lifts one end of the forming base plate placed on the 3D printer, and in this state, when the deflection wheel rises to the highest position, the belt segment on the deflection wheel can receive and hold the end of the forming base plate that has been lifted.

[0008] As a preferred technical solution of the present application, a rotating drive assembly and a tensioning assembly are arranged on the support frame away from the jacking mechanism, the rotating drive assembly is used to drive the synchronous rotation of the belts on both sides, and the tensioning assembly is used to apply a continuous tensioning force to the belts. The rotating drive assembly comprises a drive shaft rotatably connected to the top end of the support frame, the drive shaft is fixedly connected to the support rollers on both sides, a drive motor is arranged on the support frame, the output shaft of the drive motor is fixedly connected to a first pulley, the first pulley is connected to a second pulley through a synchronous belt, and the second pulley is fixedly connected to the end of the drive shaft. The tensioning assembly comprises a tensioning arm rotatably connected to the middle part of the support frame, the end of the tensioning arm is rotatably connected to a tensioning wheel matched with the belt, the middle part of the tensioning arm is provided with a first connecting head, and the bottom plate is connected with a second connecting head, and the first connecting head and the second connecting head are respectively connected to the two ends of the tension spring.

[0009] As a preferred technical solution of the present application, the top parts of the two support frames on the same side of the bottom plate are connected to each other through a top plate, the middle part of the top plate is provided with an auxiliary supporting plate matched with the inner side of the belt, and a scraping assembly is further arranged on the top plate, which is used to scrape the printed finished product on the formed substrate. The side surface of the support frame is provided with a horizontal plate, the horizontal plate is provided with a material discharging plate, one end of the material discharging plate away from the horizontal plate is inclinedly arranged towards the direction of the bottom plate, and the material discharging plate is located below the scraping assembly. The scraping assembly comprises a first mounting frame fixed to the top plate, a rotating seat is arranged in the middle part of the first mounting frame, and a scraper is rotatably connected to the rotating seat. The end of the support frame away from the jacking mechanism is provided with a second mounting frame, the second mounting frame is provided with a contact sensor for detecting the position of the formed substrate, and the distance between the contact sensor and the scraping assembly is greater than the length of the formed substrate.

[0010] By adopting the above technical solution, the present application has the following beneficial effects:

[0011] 1. High automation and efficiency improvement: through the cooperative operation of the jacking mechanism, the belt and the angle deflection mechanism, the automatic mold taking, transfer, demolding, cleaning and returning of the empty formed substrate to the original position are realized. The need for manual supervision and operation is completely eliminated, and the efficiency of post-printing processing is significantly improved, especially suitable for continuous and batch printing scenarios.

[0012] 2. Non-destructive transfer and stable transmission: by using the magnetic attraction device to adsorb the flexible contact of the belt and the precise action of the jacking mechanism and the angle deflection mechanism, the non-destructive, smooth transfer and reliable transmission of the formed substrate from the printer platform to the mold taking machine and back to the platform are realized, effectively avoiding damage to the printer platform or the formed substrate itself during the transfer process.

[0013] 3. High-efficiency and flexible demolding mechanism: innovatively utilizes the height difference formed by the belt between the deflection wheel and the supporting roller to make the forming substrate naturally bend during transmission. This controllable bending deformation can effectively preliminarily destroy the adhesion between the printed product and the forming substrate, combined with the subsequent elastic scraping assembly, forming a "physical bending preliminary demolding + scraper final cleaning" double demolding strategy, which is more complete and reliable, and is flexible to the product and the forming substrate.

[0014] 4. Integration and space optimization: highly integrates the functions of mold taking, transfer, demolding, material discharge and forming substrate recycling in a compact structure, which can be directly connected with the existing 3D printer without complex modification of the printer body, occupying a small area and being easy to integrate into an automatic production line or work unit.

[0015] 5. Cost-effectiveness and reliability: the mechanism design uses simple and reliable methods such as mechanical limiting to reduce the precision requirements of key driving elements, and the control system logic is clear. The overall structure is stable and easy to maintain, while realizing powerful functions, effectively controlling the manufacturing and maintenance costs, and improving the overall cost performance and long-term operation reliability of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description. Obviously, the drawings described below are some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0017] Figure 1 It is a structural schematic diagram of an automatic mold taking machine of a 3D printer.

[0018] Figure 2 It is a front view of an automatic mold taking machine of a 3D printer.

[0019] Figure 3 It is a structural schematic diagram of an automatic mold taking machine of a 3D printer after taking off the forming substrate.

[0020] Figure 4 It is a structural schematic diagram of a lifting mechanism in an automatic mold taking machine of a 3D printer.

[0021] Figure 5 It is a structural schematic diagram of an angle deflection mechanism in an automatic mold taking machine of a 3D printer.

[0022] Figure 6 It is a structural schematic diagram of a tensioning assembly in an automatic mold taking machine of a 3D printer.

[0023] Figure 7 Figure 1 is a schematic view of the structure of a discharge plate in an automatic mold taking machine of a 3D printer.

[0024] Figure 8 Figure 2 is a schematic view of the structure of a scraping assembly in an automatic mold taking machine of a 3D printer.

[0025] Figure 9 Figure 3 is a schematic view of the structure of a rotating driving assembly in an automatic mold taking machine of a 3D printer.

[0026] In the figure: 1, bottom plate; 2, jacking mechanism; 3, supporting mechanism; 4, forming base plate; 5, belt; 6, magnetic attraction device; 7, supporting frame; 8, supporting roller; 9, rotating driving assembly; 10, tensioning assembly; 11, angular deflection mechanism; 12, scraping assembly; 13, sliding sleeve; 14, jacking driving device; 15, sliding rod; 16, drag rod; 17, deflection wheel; 18, deflection arm; 19, deflection driving device; 20, connecting rod; 21, limiting protrusion; 22, tensioning wheel; 23, tensioning arm; 24, first connecting head; 25, tension spring; 26, second connecting head; 27, cross plate; 28, discharge plate; 29, top plate; 30, auxiliary supporting plate; 31, first mounting bracket; 32, scraper; 33, rotating seat; 34, driving shaft; 35, second pulley; 36, synchronous belt; 37, first pulley; 38, driving motor; 39, second mounting bracket; 40, contact sensor. DETAILED DESCRIPTION

[0027] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0028] In one embodiment, please refer to Figure 1 , Figure 2 and Figure 3The application discloses an automatic mold taking-out machine of a 3D printer, which comprises a bottom plate 1 arranged beside the 3D printer. The 3D printer can be arranged on the left side of an operator, and the bottom plate 1 of the mold taking-out machine is arranged on the right side of the operator. The layout is convenient for subsequent mold taking-out operation. A set of annular belts 5 are arranged on the front and rear sides of the bottom plate 1. A plurality of magnetic attraction devices 6 are uniformly embedded on the outer sides of the two belts 5 at fixed intervals, and the magnetic attraction devices 6 are preferably high-performance permanent magnets. A forming base plate 4 matched with the magnetic attraction devices 6 is made of metal (such as spring steel) which can be attracted by the magnets. It is pointed out that the forming base plate 4 is fixed on the 3D printer by relying on the magnetic attraction structure built in the printing platform. Therefore, when the forming base plate 4 is transferred to the belt 5 of the equipment, the bottom of the forming base plate 4 can immediately generate an attraction force with the magnetic attraction devices 6 on the belt 5, so that the forming base plate 4 can be synchronously and directionally moved with the belt 5. The automatic mold taking-out machine also integrates three key mechanisms, namely, a lifting mechanism 2, a supporting mechanism 3 and an angle deflection mechanism 11.

[0029] The supporting mechanism 3 is specifically a vertically arranged supporting frame 7 fixedly arranged at the left and right ends of the front and rear sides of the bottom plate 1. The upper end of each supporting frame 7 is rotatably connected to a supporting roller 8 on the side close to the center of the bottom plate 1. The left and right supporting rollers 8 jointly tension and support the annular belt 5, and make the upper horizontal section of the belt 5 stably run between the two supporting rollers 8, which provides a basis for subsequent stable demolding operation.

[0030] The lifting mechanism 2 is arranged at the left end (namely, the end close to the 3D printer) of the bottom plate 1. When the printing task is completed, the forming base plate 4 usually has a part extending out of the body of the 3D printer. At this time, the lifting mechanism 2 is started to push the extending part upwards, so that the forming base plate 4 presents an inclined posture to the right and upwards. The primary purpose of the lifting mechanism 2 is to break the magnetic connection and physical contact between the forming base plate 4 and the printing platform of the 3D printer, so as to create initial conditions for subsequent smooth transfer and demolding.

[0031] The angle deflection mechanism 11 is arranged on the supporting frame 7 on the left side. The core function of the angle deflection mechanism 11 is to actively make a part of the belt 5 close to the lifting mechanism 2 produce a local and controllable bulge (approximately a triangular area), and drive the end of the bulge section to perform the actions of lifting and falling. When the end is lifted, the bulge section of the belt 5 can in turn receive the forming base plate 4 which has been lifted, and complete the smooth transfer from the lifting mechanism 2 to the belt 5.

[0032] In one case of the embodiment, please refer to Figs. 3 and 4. Figure 5The angle deflection mechanism 11 comprises a deflection arm 18, which is rotatably connected to the support frame 7 via a rotating shaft; a deflection wheel 17, which is rotatably connected to the end (left end) of the deflection arm 18 and on which the inner side of the belt 5 is wrapped; and a deflection driving device 19 (which can be a linear motor or an electric push rod). The cylinder bottom of the deflection driving device 19 is hingedly connected to the inside of the support frame 7, and the end of its piston rod is hingedly connected to a front-and-back oriented connecting rod 20, which is fixed to the middle part of the deflection arm 18. Based on this structure, when the piston rod of the deflection driving device 19 is extended or retracted, the deflection arm 18 can be driven to rotate around the rotating shaft in the middle of the support frame 7, thereby driving the deflection wheel 17 and the wrapped belt 5 segment to perform lifting movement.

[0033] In order to accurately control the rotation amplitude of the deflection arm 18, a pair of limiting protrusions 21 are arranged on the side wall of the support frame 7, which are respectively located on the upper and lower sides of the rotation path of the deflection arm 18. When the deflection arm 18 rotates upward to touch the upper limiting protrusion 21, its movement is stopped, defining the highest position of the deflection wheel 17; conversely, when it rotates downward, its lowest position is defined by the lower limiting protrusion 21. This design makes the deflection driving device 19 not need to have precise stroke or angle control ability, and only needs to provide sufficient driving force to make the deflection arm 18 move between the two mechanical limiting points, significantly reducing the control precision requirement and manufacturing cost of the deflection driving device 19.

[0034] In one case of the present embodiment, please refer to Figure 3 and Figure 4, the jacking mechanism 2 includes a jacking drive device 14 (also can be selected linear motor or electric push rod) vertically installed in the middle of the left end of the bottom plate 1. The piston rod of the jacking drive device 14 vertically extends upward, and the top end thereof is fixedly connected to the middle of a front and rear oriented tow bar 16. In order to ensure the stability of the tow bar 16 during lifting, vertically fixed sliding sleeves 13 are symmetrically arranged on the front and rear sides of the jacking drive device 14, and each sleeve is fitted with a sliding rod 15 that can slide up and down. The upper ends of the sliding rods 15 are fixedly connected to the corresponding end portions of the tow bar 16, forming a stable guide pair. When the jacking drive device 14 is actuated to push the tow bar 16 to rise to the highest point of its stroke, the tow bar 16 can reliably lift the right end (overhanging end) of the forming substrate 4 placed on the 3D printer. At this time, if the angle deflection mechanism 11 is simultaneously actuated to make the deflection wheel 17 rise to the highest position, the belt 5 segment thereon will exactly receive and support the lower surface of the forming substrate 4 that has been lifted, and the front and rear sides of the forming substrate 4 will exactly fall on the front and rear belts 5. At the same time, the magnetic attraction device 6 on the belt 5 will firmly attract the forming substrate 4. Since the forming substrate 4 is in an inclined state at this time, its connection with the original printing platform of the 3D printer has been completely disconnected, so when the belt 5 starts to rotate under the drive, it can smoothly drive the forming substrate 4 to move to the right, entering the transfer process.

[0035] In one case of the present embodiment, please refer to 3, the support frame 7 on the right side is integrated with a rotating drive assembly 9 and a tensioning assembly 10. The rotating drive assembly 9 is used to provide synchronous rotating power for the front and rear belts 5; the tensioning assembly 10 is responsible for applying continuous tension to the belts 5, ensuring that even when the angle deflection mechanism 11 is actuated to cause changes in the path of the belts 5, the belts 5 can always closely match the rollers, effectively preventing slipping or derailing.

[0036] In one case of the present embodiment, please refer to 3 and Figure 9 , the rotating drive assembly 9 includes a front and rear oriented drive shaft 34, which is rotatably installed at the top end of the right side support frame 7 through a bearing seat, and the two ends of the drive shaft 34 are fixedly connected with the front and rear support rollers 8 respectively; a drive motor 38 fixedly installed on the support frame 7; and a transmission system connected between the output shaft of the drive motor 38 and the drive shaft 34. The transmission system is composed of a first pulley 37 fixed on the output shaft of the drive motor 38, a second pulley 35 fixed on the end of the drive shaft 34, and a synchronous belt 36 engaged between the two pulleys. Starting the drive motor 38, power is transmitted through this transmission path, which can drive the drive shaft 34 and the support rollers 8 fixedly connected thereto to rotate synchronously, thereby driving the two belts 5 to move cooperatively.

[0037] In one case of the present embodiment, please refer to 3 and Figure 6The tensioning assembly 10 comprises a tensioning arm 23, the middle part of which is rotatably connected to the support frame 7 through a rotating shaft; a tensioning wheel 22 rotatably connected to the end (left end) of the tensioning arm 23, which continuously presses on the lower branch of the inner side of the belt 5 under the action of spring force; a first connecting head 24 is arranged in the middle part of the tensioning arm 23, and a second connecting head 26 is fixed on the bottom plate 1 below the tensioning arm 23, and the two ends of the tension spring 25 are respectively hooked on the first connecting head 24 and the second connecting head 26. Through the continuous pulling force provided by the tension spring 25, the tensioning arm 23 is always subject to a tendency to rotate the end downward, thereby forcing the tensioning wheel 22 to continuously press the belt 5, automatically compensating for possible slack, and maintaining the necessary tension of the system.

[0038] In one case of the present embodiment, please refer to 7, Figure 8 and Figure 9 To enhance overall rigidity and functionality, the top ends of the two support frames 7 located on the same side (front side or rear side) of the bottom plate 1 are connected to each other by a top plate 29. The side of the top plate 29 extending towards the center of the bottom plate 1 has an auxiliary supporting plate 30, which is used to assist in supporting the horizontal upper branch of the belt 5 between two points, ensuring that its running track is straight and avoiding sagging due to gravity. In the middle part of the top plate 29, the scraping assembly 12 is installed, which functions to scrape off the finished product workpiece on the surface of the forming substrate 4 as it passes by. In addition, a left-right oriented cross plate 27 is installed above the front side support frame 7, and an inclined material discharging plate 28 is fixedly connected to the cross plate 27, with the rear end (i.e. the discharging end) of the material discharging plate 28 inclined towards the direction of the bottom plate 1. The material discharging plate 28 is precisely arranged directly below the scraping assembly 12, so that the printed finished product scraped off can naturally fall onto it and slide along the inclined surface to the designated collection area by gravity, achieving automatic and orderly material discharging.

[0039] The scraping assembly 12 comprises a front-rear oriented first mounting bracket 31 fixed to the top plate 29; and a scraper 32 mounted to the middle part of the lower surface of the first mounting bracket 31 through a rotating seat 33. The rotating seat 33 usually has a torsion spring mechanism integrated therein, so that in the natural state, the blade part of the scraper 32 can be elastically pressed against the upper surface of the forming substrate 4. This design ensures that when the forming substrate 4 carrying the printed finished product passes below the scraper 32, the scraper 32 can effectively shovel the finished product off the forming substrate 4, while also adapting to slight unevenness on the surface of the forming substrate 4 to avoid jamming or excessive wear.

[0040] A second mounting bracket 39 is also provided at the top end of the support frame 7 on the side away from the jacking mechanism 2 (i.e. the right side). The second mounting bracket 39 is oriented front-to-back, and a contact sensor 40 is mounted to the lower surface of the second mounting bracket 39. When the belt 5 moves the shaped substrate 4 to the right to the right end of the belt 5 touches the contact sensor 40, the contact sensor 40 sends a signal that the shaped substrate 4 is in place. The mounting position is calculated precisely to ensure that the distance between the contact sensor 40 and the scraping assembly 12 in the direction of travel of the belt 5 is greater than the length of a single shaped substrate 4. This means that when the right end of the shaped substrate 4 triggers the sensor, the entire surface of the shaped substrate 4 has already passed completely under the scraping assembly 12, and the scraping process is complete. The control system receives this signal and instructs the belt 5 to reverse direction, starting the process of returning the shaped substrate 4 to the 3D printer, achieving full automation of the process.

[0041] The complete working process of the automatic mold taking machine of the present application is as follows:

[0042] 1. Initial preparation and standby: The entire mold taking machine is stably placed next to the 3D printer, ensuring that the jacking mechanism 2 corresponds to the position of the printing platform of the 3D printer, and the shaped substrate 4 can be smoothly transferred. The system is in standby state.

[0043] 2. Printing completion signal reception and jacking: After the 3D printer completes the printing task, it sends a completion signal to the control system (which can be integrated or communicate with the mold taking machine control system). The control system then starts the jacking drive device 14, causing the piston rod to extend and push the drag rod 16 upwards. The drag rod 16 jacks up the overhanging end (right end) of the shaped substrate 4, causing the left side of the shaped substrate 4 to separate from the printer platform, forming an inclined state with the right side higher than the left side.

[0044] 3. Belt 5 handover and mold taking: After the jacking action is completed, the control system then starts the deflection drive device 19, driving the deflection arm 18 to rotate upwards to the upper limit, driving the deflection wheel 17 and the section of the belt 5 to lift up. The lifted section of the belt 5 naturally holds the lower surface of the jacked shaped substrate 4, and is fixed by the magnetic attraction device 6. At this point, the shaped substrate 4 has been completely carried by the belt 5 of the mold taking machine.

[0045] 4. Transfer and initial demolding (using bending): The rotation drive assembly 9 is started, driving the two belts 5 to rotate clockwise synchronously. The shaped substrate 4 moves to the right with the belt 5 under the magnetic attraction. When the shaped substrate 4 passes the left support roller 8, the height of the belt 5 at the deflection wheel 17 is lower than the height of the belt 5 at the support roller 8, and the shaped substrate 4 will undergo a controllable elastic bending in this transition area. This bending helps to initially break the adhesion between the printed product and the shaped substrate 4, achieving initial demolding.

[0046] 5. Scraping and discharging: the forming substrate 4 continues to move right, passing under the scraping assembly 12. The scraper 32, which is kept pressed down by the torsion spring, scrapes off the printed products that may remain on the forming substrate 4. The scraped products fall on the inclined discharge plate 28 below and slide along the slope into the collection container, completing the automatic discharging.

[0047] 6. In-place detection and reverse conveying: when the right end of the forming substrate 4 moves to the right to trigger the contact sensor 40 on the right, the control system determines that the substrate has completely passed through the scraping area and the scraping is complete. Then, the control system instructs the rotary drive assembly 9 to reverse, driving the belt 5 to rotate counterclockwise, and bringing the cleaned forming substrate 4 back to the left.

[0048] 7. Resetting and placing: during the left movement of the forming substrate 4, when its left end reaches the position of the left deflection wheel 17, due to the sharp change in curvature of the belt 5 at this position, the magnetic attraction force and the rigidity of the forming substrate 4 cause the substrate to start to separate from the belt 5, and its left end gradually extends out. As the belt 5 continues to move left, the contact area between the forming substrate 4 and the belt 5 continuously decreases, and finally the forming substrate 4 falls on the trailing rod 16 on its right side and falls back onto the printing platform of the 3D printer on its left side (usually the edge of the printing platform has positioning structures to assist alignment).

[0049] 8. Mechanism resetting and cycle ending: after confirming that the forming substrate 4 has been placed securely, the deflection drive device 19 is actuated to lower the deflection arm 18 to the lower limit; at the same time, the lifting drive device 14 drives the trailing rod 16 to descend, completely separating from the forming substrate 4. The 3D printer can start a new printing task, and the mold taking machine returns to standby state, completing the entire automatic mold taking cycle. This process can be fully automated through sensor signals combined with timing control, without the need for manual intervention.

[0050] The present application provides an automatic mold taking machine for a 3D printer, which realizes lossless, stable handover and reliable transmission of the forming substrate 4 through the cooperation of the magnetic attraction belt 5, the lifting mechanism 2 and the angular deflection mechanism 11, realizes the automation of the entire 3D printing mold taking process, significantly improves efficiency and eliminates manual intervention. The unique path design of the belt 5 causes the substrate to bend controllably during transmission, combined with the scraper 32, forming a high-efficiency flexible demolding mechanism of "bending breaking and scraping cleaning", which completely demolds and does not damage the objects. The device structure is compact, integrated with automatic discharging and substrate recycling functions, and seamlessly interfaces with existing printers. The mechanism design uses reliable solutions such as mechanical limit to effectively reduce manufacturing and control costs while ensuring functionality, with high cost performance and reliability.

[0051] In the description of the application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

Claims

1. An automatic mold-removing machine for a 3D printer, comprising a base plate, with synchronously rotating belts arranged on both sides of the base plate, characterized in that, The outer side of the belt is evenly distributed with magnetic attraction devices, and a molded base plate that is magnetically connected to the magnetic attraction devices is placed on the belt. It also includes a lifting mechanism, a supporting mechanism and an angle deflection mechanism. A support mechanism is provided on both sides of the base plate to support and guide the belt. The support mechanism includes a support frame fixed to the side of the base plate and a support roller rotatably mounted on the support frame and cooperating with the inner side of the belt. A lifting mechanism, located at the end of the base plate, is used to lift one end of the molding substrate placed on the 3D printer printing platform away from the substrate. An angle deflection mechanism is mounted on a support frame near the lifting mechanism and is used to drive the belt on that side to perform lifting and lowering movements.

2. The automatic mold-removing machine for a 3D printer according to claim 1, characterized in that, The angle deflection mechanism includes a deflection arm rotatably connected to the middle of the support frame, and a deflection wheel that cooperates with the inner side of the belt is rotatably connected to the end of the deflection arm. A deflection drive device for driving the deflection arm to rotate is provided inside the support frame.

3. The automatic mold-removing machine for a 3D printer according to claim 2, characterized in that, The deflection arm has a connecting rod in the middle. The deflection drive device is a linear actuator. The cylinder of the deflection drive device is rotatably connected to the support frame. The end of the piston rod of the deflection drive device is rotatably connected to the connecting rod. The support frame is also provided with a pair of limiting protrusions, which are used to contact the two sides of the deflection arm respectively when the deflection arm rotates, so as to limit the extreme position of the deflection wheel's rise and fall. When the deflection wheel is at the highest position, the height of the belt section supported at the top of the deflection wheel is lower than the height of the belt section supported by the support roller.

4. The automatic mold-removing machine for a 3D printer according to claim 1, characterized in that, The lifting mechanism includes a lifting drive device disposed at the end of the base plate. The piston rod of the lifting drive device is connected to the middle of the drag rod. Sliding sleeves connected to the base plate are disposed on both sides of the lifting drive device. Sliding rods fixedly connected to the drag rod are slidably connected to the sliding sleeves. When the lifting drive device drives the drag rod to rise to the highest position, the drag rod lifts one end of the molding substrate placed on the 3D printer. In this state, when the deflection wheel rises to the highest position, the belt segment on the deflection wheel can receive and support the end of the molded substrate that has been lifted.

5. An automatic mold-removing machine for a 3D printer according to claim 1, characterized in that, A rotary drive assembly and a tensioning assembly are provided on the support frame on the side away from the lifting mechanism. The rotary drive assembly is used to drive the belts on both sides to rotate synchronously, and the tensioning assembly is used to apply a continuous tension force to the belts.

6. An automatic mold-removing machine for a 3D printer according to claim 5, characterized in that, The rotary drive assembly includes a drive shaft rotatably connected to the top of the support frame, with both sides of the drive shaft fixedly connected to the support rollers. A drive motor is provided on the support frame, and the output shaft of the drive motor is fixedly connected to a first pulley. The first pulley is connected to a second pulley via a synchronous belt, and the second pulley is fixedly connected to the end of the drive shaft.

7. An automatic mold-removing machine for a 3D printer according to claim 5, characterized in that, The tensioning assembly includes a tensioning arm rotatably connected to the middle of the support frame. A tensioning wheel cooperating with a belt is rotatably connected to the end of the tensioning arm. A first connector is provided in the middle of the tensioning arm, and a second connector is connected to the base plate. The first connector and the second connector are respectively connected to the two ends of the tension spring.

8. An automatic mold-removing machine for a 3D printer according to claim 1, characterized in that, The tops of the two support frames located on the same side of the base plate are connected to each other by a top plate. An auxiliary support plate that cooperates with the inner side of the belt is provided in the middle of the top plate. A scraper assembly is also provided on the top plate for scraping off the printed finished product located on the molding substrate. A horizontal plate is provided on the side of the support frame, and a discharge plate is provided on the horizontal plate. The end of the discharge plate away from the horizontal plate is inclined towards the base plate, and the discharge plate is located below the scraper assembly.

9. An automatic mold-removing machine for a 3D printer according to claim 8, characterized in that, The scraping assembly includes a first mounting bracket fixed to the top plate, and a rotating seat is provided in the middle of the first mounting bracket, with the rotating seat rotatably connected to the scraper.

10. An automatic mold-removing machine for a 3D printer according to claim 8, characterized in that, A second mounting bracket is provided at the end of the support frame away from the lifting mechanism. A contact sensor for detecting the position of the molding substrate is provided on the second mounting bracket. The distance between the contact sensor and the scraping assembly is greater than the length of the molding substrate.

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