A desktop level light-curing printer

Abstract

In order to solve the problems of the prior art, the present application provides a desktop light-curing printer, comprising a printing assembly and a protection assembly, wherein the printing assembly comprises a printing platform and a control system, a resin tank is arranged above the printing platform, and an optical assembly is arranged below the printing platform; a scraper mechanism and a vertical displacement mechanism are arranged on the printing platform; the scraper mechanism comprises at least one scraper and a scraper driving mechanism, and a heating assembly for heating the scraper is arranged; a plurality of first resin flow holes for allowing resin to flow back and forth are formed on the scraper and / or between adjacent scrapers along the movement direction of the scraper; and the scraper driving mechanism drives the scraper to move back and forth in the resin tank. The present application improves the scraper of the existing printer, so that the scraper can clean the printing platform and also can stir the resin in multiple flow channels, and the heating mechanism is arranged on the scraper, so that the resin can be heated more uniformly.

Description

Technical Field

[0001] This invention belongs to the field of additive manufacturing equipment technology, specifically relating to a desktop photopolymer printer. Background Technology

[0002] Desktop photopolymer printers are compact 3D printing devices based on photopolymerization technology (SLA / DLP / LCD), suitable for home, education, creative design and other scenarios.

[0003] UV-curing printers include bottom-mounted and top-mounted printers. Bottom-mounted printers use a top-down printing method, requiring a larger amount of resin. Therefore, desktop UV-curing printers commonly use the top-mounted type. Currently, desktop UV-curing printers often suffer from the following problems:

[0004] 1. After printing, the printed part needs to be removed from the molding substrate using a spatula. Because pull-up printers require the printed part to adhere to the molding substrate so that the Z-axis mechanism can gradually lift the molding substrate (i.e., the printed part) upwards as the number of printed layers increases, the user needs to be highly skilled when using the spatula to remove the part; otherwise, the printed part can easily be damaged by the spatula.

[0005] 2. Because resin is a liquid with poor heat transfer, current desktop UV curing printers generally use a heating method with fixed thermocouple positions. This easily leads to the problem of excessively high resin temperature around the thermocouple and excessively low resin temperature further away from the thermocouple. This severe temperature unevenness not only affects the resin's flowability but also its formability, resulting in uncontrollable defects in the printed parts. Summary of the Invention

[0006] This invention addresses at least one of the problems existing in the prior art by providing a desktop UV-curing printer, comprising: a printing component and a protective component, wherein the protective component protects the printing component through a shell, cover, isolation, or other means. The printing component includes: a printing platform and a control system. A resin tank is provided above the printing platform, and an optical component is provided below the resin tank at a corresponding position on the printing platform. A scraper mechanism that reciprocates within the resin tank is provided on the printing platform, and a vertical displacement mechanism is provided outside the resin tank in a vertical direction. The vertical displacement mechanism drives a part-picking mechanism and a molding substrate to reciprocate in a vertical direction, and the molding substrate can be inserted into the resin tank and cover the working surface of the optical component.

[0007] The scraper mechanism includes at least one scraper and a scraper drive mechanism, and is equipped with a heating assembly for heating the scraper. Several first resin flow holes are formed on the scraper and / or between adjacent scrapers along the scraper's direction of movement to allow resin to flow back and forth. The scraper drive mechanism drives the scraper to reciprocate within the resin tank.

[0008] The optical components, scraper drive mechanism, and vertical displacement mechanism are signal-connected to the control system. The control system controls the optical components and vertical displacement mechanism to perform photocurable resin printing, and performs resin stirring every K time intervals based on received information, and performs resin heating based on heating control analysis.

[0009] Furthermore, the part-retrieving mechanism includes: a limiting block fixed above the resin tank, and a part-retrieving connecting assembly driven by a vertical displacement mechanism. A ejector plate is provided below the part-retrieving connecting assembly, and the top surface of the ejector plate at least covers a portion of the bottom area of ​​the limiting block. The ejector plate has several downward-facing ejector pins. The molding substrate is disposed below the ejector plate and has ejector pin through holes, the number and position of which at least cover the ejector pins.

[0010] The molding substrate has guide posts on the side facing the ejector plate, and the ejector plate has guide post holes at corresponding positions to match the guide posts. The guide posts pass through the guide post holes and are fixedly or detachably fixed to the bottom of the part removal connection assembly.

[0011] A spring is provided between the top surface of the molding substrate and the bottom surface of the ejector plate.

[0012] Furthermore, the bottom of the part-retrieving connection assembly is provided with a second threaded through hole, the guide post is provided with a third threaded blind hole in the vertical direction, and the first screw is provided with a second thread and a third thread corresponding to the second threaded hole and the third threaded hole, respectively. The first screw is screwed and fastened to the second threaded through hole through the second thread, and to the third threaded blind hole through the third thread, thereby making the guide post detachably and fixedly connected to the bottom of the part-retrieving connection assembly.

[0013] Furthermore, the scraper mechanism includes: a scraper fixing plate, at least one scraper, and a scraper driving mechanism.

[0014] The scraper mounting plate is provided with a scraper mounting groove, and the scraper is detachably mounted in the scraper mounting groove. The scraper mounting groove has a matching second resin flow hole at the location of the scraper's first resin flow hole. The inner side of the scraper mounting groove is in contact with the scraper through a heat insulation layer.

[0015] One end of the scraper fixing plate spans one side wall of the resin tank and is fixed or detachably fixed to the scraper drive mechanism. The other end spans the opposite side wall of the resin tank, and a roller is rotatably mounted on the outer end of the resin tank side wall. The roller moves along the printing platform or a roller groove added to the printing platform that matches the roller.

[0016] The scraper drive mechanism includes: a first drive device connected to the control system signal; the drive output end of the first drive device is fixedly or detachably connected to one end of a first screw that is horizontally or approximately horizontally arranged, and drives the first screw to rotate; the other end of the first screw is rotatably connected to the printing platform. A scraper fixing plate connecting sleeve is screwed onto the first screw, and the scraper fixing plate connecting sleeve is fixedly or detachably fixedly connected to the scraper fixing plate.

[0017] Furthermore, the vertical displacement mechanism includes: a limiting guide rail fixed on the printing platform, located outside the resin tank and arranged vertically; a guide rail clip slidably engages with the limiting guide rail, and the guide rail clip is fixedly connected to the connecting platform. A second driving device is fixedly connected to the top of the limiting guide rail. The second driving device is signal-connected to the control system, and its drive output end is downwardly positioned and fixed or detachably fixed to one end of a second screw. The other end of the second screw is rotatably connected to the support platform at the bottom of the limiting guide rail and rotates under the drive of the second driving device. The connecting platform has a fourth threaded hole at a position corresponding to the second screw, for screwing into the second screw.

[0018] Furthermore, the printing assembly also includes a resin feeding / unloading mechanism. The resin feeding / unloading mechanism includes a first resin connecting pipe, one end of which is connected to the bottom of one side of the resin tank. The other end of the first resin connecting pipe is connected to one inlet of a bidirectional pump via a first buffer bottle. The other inlet of the bidirectional pump is connected to a resin storage mechanism detachably and fixedly mounted outside the protective assembly via a second resin connecting pipe. The control terminal of the bidirectional pump is connected to a control system signal.

[0019] Furthermore, the printing assembly also includes a filtering mechanism. The filtering mechanism includes a fan and an air duct that directs airflow from the resin tank to the filter bag. The filter bag includes a filter bag protective shell that is fixedly or detachably fixed to the protective assembly or the printing assembly, and the air duct connects the fan and the interior of the filter bag protective shell. The filter bag is detachably fixed inside the filter bag protective shell. The control terminal of the fan is signal-connected to the control system.

[0020] Furthermore, the method for the control system to perform resin stirring based on received information includes the following steps:

[0021] Step 101: Obtain resin type A, resin input amount B, current ambient temperature T, and current ambient humidity H.

[0022] Step 102: Based on resin type A and resin input amount B, retrieve the stirring interval time K0 corresponding to standard temperature T0 and standard ambient humidity H0 from the database.

[0023] Step 103 calculates the current temperature difference TC = T - T0 and the ambient humidity difference HC = H - H0, and obtains the stirring time interval adjustment parameter D based on the following formula:

[0024]

[0025] In the formula, e is the natural constant, W is the temperature adjustment coefficient, and Q is the humidity adjustment coefficient. The temperature adjustment coefficient W and humidity adjustment coefficient Q are obtained through preliminary experiments depending on the type of resin.

[0026] Step 104 determines the stirring interval K under the current ambient temperature T and current ambient humidity H by calculating K = D * K0, and performs resin stirring once every K time interval.

[0027] When printing starts in step 105, steps 101 to 104 are performed once. From the start of printing to the end of printing, the current ambient temperature T and the current ambient humidity H are obtained once at each preset time interval, and steps 103 to 104 are repeated once. The newly obtained stirring interval K` is used as the interval for the next stirring process.

[0028] Furthermore, the printing assembly also includes a dual-light monitoring camera. The camera end of the dual-light monitoring camera faces the space inside the resin tank, and its signal output end is connected to the control system.

[0029] Furthermore, after receiving data from the dual-light monitoring camera, the control system performs supplementary stirring processing, which includes the following steps:

[0030] Step 201 converts the input information from the dual-light monitoring camera into an infrared radiation distribution map of the space inside the resin tank.

[0031] Step 202-A determines the temperature distribution of each area in the resin tank based on the infrared radiation distribution map of the tank. If the temperature difference between the highest and lowest temperatures in the resin area exceeds the preset first temperature difference threshold, a resin stirring process is performed, and the interval time for the next resin stirring process is reset based on the stirring interval time K.

[0032] Step 202-B: Convert the infrared radiation distribution map of the tank space into a temperature grid distribution map of the tank space according to the preset grid lines. If the difference between the highest and lowest temperatures in adjacent preset number of grids in the resin area exceeds the preset second temperature difference threshold of the resin, perform a resin stirring process and reset the interval time for the next resin stirring process based on the stirring interval time K.

[0033] You may choose to perform either step 202-A or step 202-B, or perform them simultaneously.

[0034] Furthermore, after receiving data from the dual-light monitoring camera, the control system performs heating control analysis, which includes the following steps:

[0035] Step 301 converts the input information from the dual-light monitoring camera into an infrared radiation distribution map of the space inside the resin tank.

[0036] Step 302: Based on the infrared radiation distribution map of the space inside the tank, determine the temperature distribution map of each area inside the resin tank. When the average temperature of the resin area is lower than the preset temperature threshold, the control system controls the heating component to start and performs resin stirring.

[0037] Step 303 repeats step 302 until the average temperature of the resin region exceeds a preset post-heating temperature threshold. The control system then shuts off the heating element, returns the scraper to its initial position, and resets the interval for the next resin stirring process based on the stirring interval time K. The preset post-heating temperature threshold is greater than or equal to a preset temperature threshold.

[0038] Furthermore, the method for determining the resin region includes: using the area covered by the molding substrate in the resin tank as the first exclusion area, whereby the portion of the area in the resin tank excluding the first exclusion area is the resin region.

[0039] Furthermore, the first exclusion zone is proportionally reduced to the opposite side of the dual-light monitoring camera based on the angle of the dual-light monitoring camera toward the resin tank, as the height of the displacement portion of the vertical displacement mechanism increases.

[0040] Furthermore, the area of ​​the printed surface of the optical component located within the resin tank is designated as the second exclusion zone. In this case, the exclusion zone is the sum of the first and second exclusion zones, and the portion of the area within the resin tank excluding the exclusion zone is the resin area.

[0041] Furthermore, the resin stirring treatment includes the following steps:

[0042] Step 401: Pause after the optical components have completed printing this layer.

[0043] Step 402: Control the vertical displacement mechanism to drive the picking mechanism and the molding substrate to move upward in the vertical direction to the target height, and record the upward stroke L.

[0044] Step 403 controls the scraper mechanism to perform a preset number of reciprocating movements within the resin tank.

[0045] Step 404: Control the scraper mechanism to return to its initial position.

[0046] Step 405 controls the vertical displacement mechanism to drive the part picking mechanism and the molding substrate to move downward in the vertical direction, with a stroke of L.

[0047] Step 406 controls the optical components to start and continue printing.

[0048] Optionally, the target height mentioned in step 402 is a preset height value.

[0049] Optionally, the target height U in step 402 is U0 + Ud + Uk, where U0 is the height of the scraper mechanism, Ud is the height of the vertical displacement mechanism during printing, and Uk is an adjustment value greater than or equal to 0.

[0050] This invention has at least one of the following advantages:

[0051] 1. The present invention has a compact structure that meets the requirements for use with desktop printers.

[0052] 2. This invention improves upon the existing printer's scraper, enabling it to clean the printing platform while simultaneously agitating the resin through multiple channels. This achieves resin mixing, resulting in uniform resin temperature across different zones. Furthermore, it prevents excessive resin overflow caused by large fluctuations agitated by the scraper when there is a large amount of resin.

[0053] 3. The present invention sets the heating mechanism on the scraper, which can heat the resin during the movement of the scraper according to the preset method, and stir the resin at the same time as heating, so that the resin can be heated more evenly. Attached Figure Description

[0054] Figure 1 The diagram shown is a disassembled structural diagram of the desktop photopolymer printer of the present invention.

[0055] Figure 2 The diagram shown is a structural schematic of the printing component of this invention.

[0056] Figure 3 The diagram shown is a schematic diagram of the part-retrieving mechanism of the present invention.

[0057] Figure 4 As shown Figure 3 A magnified structural diagram of part A in the diagram.

[0058] Figure 5 The diagram shown is a schematic representation of the guide post of the present invention.

[0059] Figure 6 The diagram shown is a structural schematic of the scraper mechanism of the present invention.

[0060] Figure 7 The diagram shown is a structural schematic of the vertical displacement mechanism of the present invention.

[0061] Figure 8 The diagram shown is a rear view of the desktop UV-curing printer of the present invention. Detailed Implementation

[0062] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0063] Please note that the terms "above", "below", "left", "right", "top", "top", "bottom", "bottom", etc., used in this invention to describe positional relationships do not represent the absolute positional relationship between modules / components / assemblies / parts / components, but rather the relative positional relationship between modules / components / assemblies / parts / components.

[0064] This invention provides, for example, a desktop UV-curing printer, such as... Figure 1 As shown, it includes a printing component 2 and a protective component 1. The protective component 1 includes a protective housing 102, a protective cover 103, and a protective isolation panel 101, and protects the printing component 2. The protective cover 103 can rotate relative to the protective housing 102, thereby exposing or closing the printing part of the printing component 2, facilitating printing operations for the user.

[0065] like Figure 2 As shown, the printing assembly 2 includes a printing platform 201 and a control system. A resin tank 202 is positioned above the printing platform 201, and an optical assembly 203 is positioned below the corresponding location of the resin tank 202. A scraper mechanism 206 is provided on the printing platform 201, reciprocating within the resin tank 202. A vertical displacement mechanism 209 is provided outside the resin tank 202 in a vertical direction. The vertical displacement mechanism 209 drives a part-picking mechanism 205 and a molding substrate 204 to reciprocate in a vertical direction, and the molding substrate 204 can be inserted into the resin tank 202 and cover the working surface of the optical assembly 203.

[0066] The scraper mechanism 206 includes one, two, three, or other required number of scrapers 2062 and a scraper drive mechanism 2063, and is equipped with a heating assembly 2064 for heating the scrapers 2062. Several first resin flow holes 20621 are formed on the scrapers 2062 along their movement direction to allow resin to flow back and forth. Alternatively, several first resin flow holes 20621 are formed between adjacent scrapers 2062 along their movement direction to allow resin to flow back and forth. The scraper drive mechanism 2063 drives the scrapers 2062 to reciprocate within the resin tank 202.

[0067] The optical component 203, the scraper drive mechanism 2063, and the vertical displacement mechanism 209 are connected to the control system via signals. The control system controls the optical component 203 and the vertical displacement mechanism 209 to perform photocurable resin printing, and performs resin stirring once every K time intervals based on received information, and performs resin heating based on heating control analysis.

[0068] Existing desktop UV-curing printers typically perform resin stirring after printing each component. For simple, small components, this method generally meets the requirement of resin uniformity. However, when printing complex or large components, whether or not to stir the resin midway requires the user's judgment based on experience, which limits the printing quality to the user's subjective judgment. This invention improves upon this by performing resin stirring at regular intervals (K) during the printing process.

[0069] Furthermore, the present invention mounts the heating component 2064 on the scraper 2062, and based on heating control analysis, activates the heating component 2064 when necessary to perform reciprocating heating with the scraper 2062 in the resin. Compared with the traditional fixed-point heating mode, this method provides more uniform heating, effectively improves the thermal uniformity of the resin, and avoids printing defects caused by uneven heating.

[0070] Furthermore, when a traditional scraper-type doctor blade moves, it pushes resin upwards and to the sides of the blade, causing a violent outward flow of resin. When this resin flow collides with the sidewall of the resin tank 202, it creates strong turbulence, which can easily lead to resin splashing. Since the resin used in printing is at a high temperature, splashed resin is not only difficult to clean but also poses a potential risk of burning the user.

[0071] Therefore, the present invention improves the scraper structure. The scraper 2062 is provided with a first resin flow hole 20621. When the scraper 2062 reciprocates, resin flows through the first resin flow hole 20621, forming multiple streams of turbulence and mixing that are relatively weaker than those formed by the scraper structure. On the one hand, these multiple streams of turbulent and mixed resin mix and disperse, achieving the purpose of stirring the resin. On the other hand, this turbulence and mixing is weaker than the turbulence formed by the scraper, and the forces between adjacent turbulences cancel each other out, thus preventing the resin from forming a significant and violent flow towards the outside of the resin tank 202. This obviously reduces the possibility of resin splashing during the stirring process.

[0072] The present invention provides an exemplary picking mechanism 205, such as... Figure 2 and Figure 3 As shown, the system includes: a limiting block 2051 fixed above the resin tank 202, and a part-retrieving connecting assembly 2052 driven by a vertical displacement mechanism 209. Below the part-retrieving connecting assembly 2052 is an ejector plate 2053, the top surface of which at least covers a portion of the bottom area of ​​the limiting block 2051. The ejector plate 2053 has several downwardly positioned ejector pins 20531. The molding substrate 204 is disposed below the ejector plate 2053 and has ejector pin through holes 2042, the number and position of which at least cover the ejector pins 20531.

[0073] The molding substrate 204 has a guide post 2041 on the side facing the ejector plate 2053, and the ejector plate 2053 has a guide post hole 20532 at the corresponding position of the guide post 2041. The guide post 2041 passes through the guide post hole 20532 and is fixed or detachably fixed to the bottom of the part picking connection assembly 2052.

[0074] A spring 2054 is provided between the top surface of the molding substrate 204 and the bottom surface of the ejector plate 2053.

[0075] Compared to existing technologies that use a scraper to remove the printed component from the bottom surface of the molding substrate 204, this invention provides a component removal mechanism that enables automatic and safe component removal. During printing, a spring 2054 supports the ejector plate 2053, preventing the ejector pin 20531 from passing through the ejector pin through-hole 2042. At this time, photopolymerization printing can be performed on the bottom surface of the molding substrate 204. The printed component adheres to the bottom surface of the molding substrate 204 and is gradually lifted upwards by the vertical displacement mechanism 209 as printing progresses.

[0076] After the component printing is completed, the vertical displacement mechanism 209 drives the ejector plate 2053 and the molding substrate 204 to continue to rise upwards via the component picking connection assembly 2052. When the ejector plate 2053 moves to the position of the limiting block 2051, it is limited by the limiting block 2051 and cannot continue to rise. At this time, the vertical displacement mechanism 209 drives the molding substrate 204 to continue to rise upwards via the component picking connection assembly 2052, while the ejector plate 2053 stops rising due to limitation. The spring 2054 is compressed, and the ejector pin 20531 is pushed out from the ejector pin through hole 2042, thereby detaching the component from the bottom end face of the molding substrate 204 and completing the component picking. The guide post 2041 can limit the movement of the molding substrate 204 relative to the ejector plate 2053, avoiding possible damage to the ejector pin 20531 caused by misalignment.

[0077] This invention achieves automatic component removal by using several ejector pins 20531 to detach the component from the bottom surface of the forming substrate 204. On the one hand, it eliminates the need for the user to scrape with a scraper, thus reducing the likelihood of damage to the printed component due to improper scraping. On the other hand, the densely arranged ejector pins 20531 result in smaller forces at individual points and larger total forces on the component when it is ejected, making it difficult to damage the component during the removal process and further reducing the possibility of damage to the printed component during the removal action.

[0078] As needed, when printing, the user can follow the printer's prompts and, once the vertical displacement mechanism 209 raises the ejector plate 2053 to a position close to the limit block 2051, install the receiving plate 208 below the printing component, near the printing component. This allows the ejected printing component to fall onto the receiving plate 208, and excess resin can also flow onto the receiving plate 208, making it convenient for the user to pick up the part and also allowing for the recycling of excess resin.

[0079] If necessary, the elastic force of the spring 2054 can be adjusted so that the bottom of the ejector pin 20531 is parallel to or slightly concave to the bottom surface of the molding substrate 204, thereby reducing the excess resin remaining in the ejector pin through hole 2042.

[0080] This invention provides, by way of example, a component picking and connecting assembly 2052, such as... Figures 3 to 5 As shown, the bottom of the part-retrieving connecting assembly 2052 is provided with a second threaded through hole 20521, and the guide post 2041 is provided with a third threaded blind hole 20411 in the vertical direction. The first screw 2055 is provided with a second thread and a third thread corresponding to the second threaded hole 20521 and the third threaded hole 20411, respectively. The first screw 2055 is screwed and fastened to the second threaded through hole 20521 through the second thread, and to the third threaded blind hole 20411 through the third thread, thereby detachably and fixedly connecting the guide post 2041 to the bottom of the part-retrieving connecting assembly 2052.

[0081] This method allows for a detachable connection between the component picking and connecting assembly 2052, the molding substrate 204, and the ejector plate 2053. This enables the selection of molding substrates 204 and ejector plates 2053 with different densities and thicknesses of ejector pins according to different printed components, and also facilitates user maintenance of the molding substrate 204.

[0082] The present invention provides an exemplary scraper mechanism 206, such as... Figure 2 and Figure 6 As shown, it includes: a scraper fixing plate 2061, a scraper 2062, and a scraper driving mechanism 2063. The scraper 2062 is provided with eight first resin flow holes 20621. The number of first resin flow holes 20621 provided on the scraper 2062 can be designed as needed and is not necessarily eight as in this example.

[0083] The scraper mounting plate 2061 is provided with a scraper mounting groove, and the scraper 2062 is detachably mounted in the scraper mounting groove. The scraper mounting groove has eight matching second resin flow holes 20612 at the position of the first resin flow hole 20621 of the scraper 2062. The inner side of the scraper mounting groove is in contact with the scraper 2062 through a heat insulation layer. This invention, by detachably mounting the scraper 2062 in the scraper mounting groove, allows for convenient replacement and maintenance of the scraper 2062. Furthermore, the addition of a heat insulation layer between the scraper 2062 and the scraper mounting groove minimizes the heat transfer from the scraper 2062 heated by the heating component 2064 to the scraper mounting plate 2061, thus avoiding heat waste and the potential for burns to the user due to overheating of the scraper mounting plate 2061.

[0084] One end of the scraper fixing plate 2061 extends across one side wall of the resin tank 202 and is fixed or detachably fixed to the scraper driving mechanism 2063. The other end extends across the opposite side wall of the resin tank 202, and a roller 20614 is rotatably mounted on the outer end of the side wall of the resin tank 202. The roller 20614 moves along the printing platform 201 or a roller groove on the printing platform 201 that matches the roller 20614.

[0085] The scraper drive mechanism 2063 includes: a first drive device 20631 connected to the control system signal; the drive output end of the first drive device 20631 is fixedly or detachably connected to one end of a horizontally or nearly horizontally arranged first screw 20632, and drives the first screw 20632 to rotate; the other end of the first screw 20632 is rotatably connected to the printing platform 201. A scraper fixing plate connecting sleeve 20633 is screwed onto the first screw 20632, and the scraper fixing plate connecting sleeve 20633 is fixedly or detachably fixedly connected to the scraper fixing plate 2061.

[0086] At this time, when it is necessary to control the scraper 2062 to perform actions such as stirring, scraping the printing platform 201, and heating, the control system controls the first drive device 20631 to start, thereby causing the first screw 20632 to rotate, which in turn causes the scraper fixing plate connecting sleeve 20633 to reciprocate along the first screw 20632 according to the rotation mode of the first screw 20632. At this time, the scraper fixing plate connecting sleeve 20633 drives the scraper fixing plate 2061 and the scraper 2062 installed in the scraper mounting groove to reciprocate together. The scraper fixing plate 2061 forms a clamping groove 20613 that matches the side wall of the resin tank 202 at the position opposite to the first drive device 20631 through the side wall of the scraper mounting groove and the support plate of the roller 20614. This setting reduces the movement resistance through the setting of the roller 20614. On the other hand, the side wall of the resin tank 202 is clamped by the clamping groove 20613, so that when the scraper fixing plate connecting sleeve 20633 drives the scraper fixing plate 2061 to move, the scraper fixing plate 2061 can drive the scraper 2062 to move back and forth together.

[0087] When a traditional scraper-type doctor blade moves, it pushes resin upwards and to the sides of the blade, causing a violent outward flow of resin. When this resin flow collides with the sidewall of the resin tank 202, it creates strong turbulence, which can easily lead to resin splashing. Since the resin used in printing is at a high temperature, splashed resin is not only difficult to clean but also poses a potential risk of burning the user.

[0088] Therefore, the present invention improves the scraper structure. The scraper 2062 has a first resin flow hole 20621, and the scraper fixing plate 2061 has a corresponding second resin flow hole 20612. When the scraper fixing plate 2061 drives the scraper 2062 to reciprocate, resin flows through the first and second resin flow holes 20621 and 20612, forming multiple streams of turbulence and mixing that are relatively weaker than those formed by the scraper structure. On the one hand, these multiple streams of turbulent and mixed resin mix and disperse, achieving the purpose of stirring the resin. On the other hand, this turbulence and mixing is weaker than the turbulence formed by the scraper, and the forces between adjacent turbulence cancel each other out, thus preventing the resin from forming a significant and violent flow towards the outside of the resin tank 202, obviously reducing the possibility of resin splashing during the stirring process.

[0089] This invention provides an exemplary vertical displacement mechanism 209, such as... Figure 2 and Figure 7As shown, the system includes: a vertically oriented guide rail 2093 fixed on the printing platform 201, located outside the resin tank 202; a guide rail clip 2095 slidably engaged on the guide rail 2093; and a connecting platform 2094 fixedly connected to the guide rail 2093. A second driving device 2091 is fixedly connected to the top of the guide rail 2093. The second driving device 2091 is signal-connected to the control system, and its drive output end is downwardly oriented and fixed or detachably fixed to one end of a second screw 2092. The other end of the second screw 2092 is rotatably connected to a support platform at the bottom of the guide rail 2093 and rotates under the drive of the second driving device 2091. The connecting platform 2094 has a fourth threaded hole at a position corresponding to the second screw 2092 for screwing into it.

[0090] At this time, when it is necessary to adjust the height of the molding substrate 204, the control system controls the second drive device 2091 to start, thereby driving the second screw 2092 to rotate. At this time, since the guide rail clip 2095 is engaged with the limiting guide rail 2093, the connecting platform 2094 screwed to the second screw 2092 is restricted to move up and down relative to the second screw 2092.

[0091] If necessary, a connecting post 2097 and a torsion fixing mechanism 2096 can be added to the connecting platform 2094. In this case, the end of the part-retrieving connecting assembly 2052 facing the connecting platform 2094 is provided with a connecting post groove that matches the connecting post 2097. By inserting the part-retrieving connecting assembly 2052 into the connecting post 2097 and fixing it with the torsion fixing mechanism 2096, the part-retrieving connecting assembly 2052 and the connecting platform 2094 can be detachably fixed.

[0092] like Figure 7 As shown, the torsion fixing mechanism 2096 includes a fixed column, with a handle rotatably connected to the top of the fixed column. An elastic plate is provided at the lower end of the handle. The rotatable connection end between the handle and the fixed column is curved. When the handle is placed horizontally, the distance between the rotation axis of the handle and the fixed column and the bottom end of the current curved surface of the handle is Y1. When the handle is placed vertically, the distance between the rotation axis of the handle and the fixed column and the bottom end of the current curved surface of the handle is Y2, where Y1 > Y2. Thus, when it is necessary to engage or disengage the locking slot from the fixed column, the handle is lifted vertically, causing the elastic plate to move upwards along the curved surface of the handle. This reduces the pressure and friction between the elastic plate and the top surface of the locking slot, as well as between the bottom surface of the locking slot and the top surface of the connecting column 2097, thereby allowing the locking slot to engage or disengage from the fixed column. When the snap-fit ​​groove is engaged with the fixing post and needs to be fixed, press the handle down to the horizontal position, so that the elastic plate moves downward along the curved surface of the handle, increasing the pressure and friction between the elastic plate and the top surface of the snap-fit ​​groove, as well as between the bottom surface of the snap-fit ​​groove and the top surface of the connecting post 2097, thereby fastening the snap-fit ​​groove and the connecting post 2097.

[0093] This invention provides an exemplary printing component 2, such as... Figure 1 and Figure 8 As shown, the printing assembly 2 further includes a resin feeding / unloading mechanism 4. The resin feeding / unloading mechanism 4 includes a first resin connecting pipe 401, one end of which is connected to the bottom of one side of the resin tank 202. The other end of the first resin connecting pipe 401 is connected to one inlet of a bidirectional pump 402 via a first buffer bottle. The other inlet of the bidirectional pump 402 is connected to a resin storage mechanism detachably and fixedly mounted outside the protective assembly 1 via a second resin connecting pipe 403. The control terminal of the bidirectional pump 402 is connected to the control system signal.

[0094] At this point, if necessary, after printing is complete, the bidirectional pump 402 can be activated to pump the resin in the resin tank 202 to the resin storage mechanism through the first resin connecting pipe 401 and the second resin connecting pipe 403 for resin recovery. Alternatively, a resin storage mechanism containing clean resin can be prepared before printing. During printing, if necessary, the bidirectional pump 402 can be activated to pump the clean resin in the resin storage mechanism to the resin tank 202 through the first resin connecting pipe 401 and the second resin connecting pipe 403 for resin replenishment.

[0095] This invention provides an exemplary printing component 2, such as... Figure 1 and Figure 8 As shown, the printing assembly 2 further includes a filtering mechanism 207. The filtering mechanism 207 includes a fan and an air duct that directs airflow from the resin tank 202 to the filter bag. The filter bag includes a filter bag protective shell that is fixedly or detachably fixed to the protective assembly 1 or the printing assembly 2. The air duct connects the fan and the interior of the filter bag protective shell. The filter bag is detachably fixed inside the filter bag protective shell. The control terminal of the fan is signal-connected to the control system.

[0096] Since the resin used for printing often has an odor, especially since it needs to be heated during printing, this invention addresses this issue by absorbing as much of the odor emitted by the resin as possible into a filter bag for adsorption and filtration. The adsorbent material in the filter bag can be activated carbon. This reduces the odor emitted by the resin into the surrounding environment during the printing process, improving the user experience.

[0097] like Figure 8 As shown, a switch door 104 can be added to the protective shell of the filter bag. When the user needs to replace the filter bag, the switch door 104 can be opened, and the switch door 104 can be closed after the filter bag is replaced.

[0098] The present invention provides an exemplary method for the control system to perform resin stirring based on received information, comprising the following steps:

[0099] Step 101: Obtain resin type A, resin input amount B, current ambient temperature T, and current ambient humidity H.

[0100] Step 102: Based on resin type A and resin input amount B, retrieve the stirring interval time K0 corresponding to standard temperature T0 and standard ambient humidity H0 from the database.

[0101] Step 103 calculates the current temperature difference TC = T - T0 and the ambient humidity difference HC = H - H0, and obtains the stirring time interval adjustment parameter D based on the following formula:

[0102]

[0103] In the formula, e is the natural constant, W is the temperature adjustment coefficient, and Q is the humidity adjustment coefficient. The temperature adjustment coefficient W and humidity adjustment coefficient Q are obtained through preliminary experiments depending on the type of resin.

[0104] Step 104 determines the stirring interval K under the current ambient temperature T and current ambient humidity H by calculating K = D * K0, and performs resin stirring once every K time interval.

[0105] When printing starts in step 105, steps 101 to 104 are performed once. From the start of printing to the end of printing, the current ambient temperature T and the current ambient humidity H are obtained once at each preset time interval, and steps 103 to 104 are repeated once. The newly obtained stirring interval K` is used as the interval for the next stirring process.

[0106] During the printing process, resin stirring is required at intervals. This serves two purposes: firstly, it mixes the resin solution in different areas, improving its uniformity; secondly, it mixes resin solutions from different temperature zones, improving temperature uniformity. Due to the variety of resins and the complexity of the printing environment, existing desktop UV curing printers typically do not have pre-set resin stirring intervals. This means that users must determine whether resin stirring is necessary, and the uniformity of resin uniformity and temperature directly affects print quality. Consequently, the quality of components printed by existing desktop UV curing printers is largely dependent on the user's experience. While frequent resin stirring can overcome these problems, it significantly reduces printing efficiency.

[0107] This invention introduces a unique stirring interval analysis method based on the above-mentioned methods, which considers the main factors affecting the resin curing speed and temperature distribution, such as resin type, resin addition amount, ambient temperature, and ambient humidity. This allows for the determination of a reasonable stirring frequency interval during the printing process, enabling automatic stirring of the resin liquid. This ensures printing efficiency while maintaining the necessary uniformity of the resin liquid, significantly improving the yield of printed components.

[0108] The present invention provides an exemplary printing component 2, such as... Figure 1 As shown, the printing component 2 also includes a dual-light monitoring camera 3. The camera end of the dual-light monitoring camera 3 faces the space inside the resin tank 202, and its signal output end is connected to the control system signal.

[0109] After receiving data from the dual-light monitoring camera 3, the control system performs supplementary stirring processing, which includes the following steps:

[0110] Step 201 converts the input information from the dual-light monitoring camera 3 into an infrared radiation distribution map of the space inside the resin tank 202.

[0111] Step 202-A determines the temperature distribution of each area in the resin tank 202 based on the infrared radiation distribution map of the tank space. If the temperature difference between the highest and lowest temperatures in the resin area exceeds the preset first temperature difference threshold of the resin, a resin stirring process is performed, and the interval time for the next resin stirring process is reset based on the stirring process interval time K.

[0112] Step 202-B: Convert the infrared radiation distribution map of the tank space into a temperature grid distribution map of the tank space according to the preset grid lines. If the difference between the highest and lowest temperatures in adjacent preset number of grids in the resin area exceeds the preset second temperature difference threshold of the resin, perform a resin stirring process and reset the interval time for the next resin stirring process based on the stirring interval time K.

[0113] You may choose to perform either step 202-A or step 202-B, or perform them simultaneously.

[0114] Resin temperature is a crucial factor affecting the yield rate of printed components. Current technology typically uses temperature sensors to detect the temperature of fixed points in the resin solution to determine if the temperature meets requirements and whether heating treatment is necessary. However, resin generally has poor heat transfer capabilities, and fixed-point temperature measurement makes it difficult to accurately obtain the overall temperature of the resin solution. This can easily lead to problems such as untimely or overheating, thus affecting the print yield rate.

[0115] This invention uses a dual-light monitoring camera 3 to measure the temperature of the resin liquid area to obtain the overall temperature distribution of the resin liquid area. Based on the overall temperature distribution of the resin liquid area, it determines whether to start the stirring action to equalize the resin liquid temperature. This can effectively maintain the uniformity of the resin liquid temperature and avoid excessive regional temperature differences in the resin liquid.

[0116] This invention provides an exemplary heating control analysis method: the control system receives data from a dual-light monitoring camera 3 and then performs heating control analysis, which includes the following steps:

[0117] Step 301 converts the input information from the dual-light monitoring camera 3 into an infrared radiation distribution map of the space inside the resin tank 202.

[0118] Step 302: Based on the infrared radiation distribution map of the space inside the tank, determine the temperature distribution map of each area inside the resin tank 202. When the average temperature of the resin area is lower than the preset temperature threshold, the control system controls the heating component 2064 to start and perform resin stirring.

[0119] Step 303 repeats step 302 until the average temperature of the resin region exceeds a preset post-heating temperature threshold. The control system then controls the heating component 2064 to shut down, controls the scraper 2062 to return to its initial position, and resets the interval for the next resin stirring process based on the stirring interval time K. The preset post-heating temperature threshold is greater than or equal to a preset temperature threshold.

[0120] This invention determines whether the resin liquid needs to be heated based on the temperature distribution of the resin liquid area formed by the dual-light monitoring camera 3, effectively reducing the problems of untimely or excessive heating in existing fixed-point temperature measurement technology.

[0121] The present invention provides an exemplary method for determining a resin region, comprising: using the area covered by the molding substrate 204 in the resin tank 202 as a first exclusion area, wherein the portion of the area in the resin tank 202 excluding the first exclusion area is the resin region.

[0122] When the dual-light monitoring camera 3 performs regional infrared monitoring of the resin tank 202, it also simultaneously detects the area of ​​the resin tank 202 obscured by the molding substrate 204. Since the temperature of the molding substrate 204 is generally significantly different from the resin temperature, including the temperature of the molding substrate 204 in the judgment process would significantly increase the possibility of misjudgment. Therefore, it is necessary to exclude the area covered by the molding substrate 204 within the resin tank 202 to avoid misjudging the resin temperature.

[0123] The present invention provides an exemplary method for determining a resin region, which further includes: the first exclusion region being proportionally reduced to the opposite side of the dual-light monitoring camera 3 based on the angle of the dual-light monitoring camera 3 toward the resin tank 202 as the height of the displacement portion of the vertical displacement mechanism 209 increases.

[0124] Since the dual-light monitoring camera 3 is generally at a certain angle to the resin tank 202, as the molding substrate 204 rises, the area of ​​the molding substrate 204 that blocks the resin tank 202 in the image of the dual-light monitoring camera 3 will be proportionally reduced to the opposite side of the dual-light monitoring camera 3.

[0125] Therefore, the present invention will adaptively adjust the first exclusion zone to incorporate the resin liquid temperature into the judgment as much as possible, so as to improve the judgment accuracy.

[0126] The present invention provides an exemplary method for determining a resin region, which further includes, based on the above method for determining a resin region, taking the area of ​​the printing surface of the optical component 203 located in the resin tank 202 as a second exclusion area. At this time, the exclusion area is the sum of the first exclusion area and the second exclusion area, and the part of the area in the resin tank 202 excluding the exclusion area is the resin region.

[0127] When the molding substrate 204 rises to a certain height, the first exclusion area will shrink to a size smaller than the printing surface of the optical component 203. When the resin liquid is cured under the action of the optical component 203, its temperature will be significantly different from the rest of the uncured resin. Therefore, the present invention uses the area of ​​the printing surface of the optical component 203 located in the resin tank 202 as the second exclusion area, and adds the first exclusion area and the second exclusion area together to avoid misjudgment caused by reasonable temperature differences during the curing process.

[0128] This invention provides an exemplary resin stirring treatment method, comprising the following steps:

[0129] Step 401: Pause after controlling the optical component 203 to complete the printing of this layer.

[0130] Step 402: Control the vertical displacement mechanism 209 to drive the picking mechanism 205 and the molding substrate 204 to move upward in the vertical direction to the target height, and record the upward stroke L.

[0131] Step 403 controls the scraper mechanism 206 to perform a preset number of reciprocating movements within the resin tank 202.

[0132] Step 404 controls the scraper mechanism 206 to return to its initial position.

[0133] Step 405 controls the vertical displacement mechanism 209 to drive the part picking mechanism 205 and the molding substrate 204 to move downward in the vertical direction, with a stroke of L.

[0134] Step 406: Control the optical assembly 203 to start and continue printing.

[0135] This method can lift the molding substrate 204 and the printed semi-finished product adhered to the molding substrate 204 to the outside of the resin tank 202 through the vertical displacement mechanism 209 during stirring, and then carry out the stirring action. This can avoid the possibility of the scraper touching or damaging the printed semi-finished product during the stirring action.

[0136] This invention provides an exemplary method for setting the target height in step 402 as a preset height value. This method uses a fixed height, which requires less computation and, by setting a higher preset height, ensures that the scraper will not touch or damage the printed semi-finished product during its stirring motion.

[0137] This invention provides an exemplary target height for step 402, where the target height U = U0 + Ud + Uk, and U0 is the height of the scraper mechanism 206, Ud is the upward movement height of the vertical displacement mechanism 209 during printing, and Uk is an adjustment value greater than or equal to 0. This method allows for real-time adjustment of the target height U through simple calculations, maintaining sufficient clearance relative to the scraper to ensure that the scraper's stirring motion does not touch or damage the printed semi-finished product. Simultaneously, it reduces unnecessary upward and downward strokes, thereby improving printing efficiency.

[0138] like Figure 8 As shown, if necessary, heat dissipation holes 105 can also be added to the protective housing 102 to dissipate heat from the optical components 203.

[0139] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A desktop level light-cured printer, comprising: A printing assembly (2) and a protection assembly (1), wherein the protection assembly (1) protects the printing assembly (2), characterized in that the printing assembly (2) comprises a printing platform (201) and a control system, the printing platform (201) is provided with a resin tank (202) above, and the printing platform (201) is provided with an optical assembly (203) below the corresponding position of the tank body of the resin tank (202); the printing platform (201) is provided with a scraper mechanism (206) reciprocating in the tank of the resin tank (202), and a vertical displacement mechanism (209) is provided outside the resin tank (202) in the vertical direction; the vertical displacement mechanism (209) drives a taking mechanism (205) and a forming substrate (204) to reciprocate in the vertical direction, and the forming substrate (204) can be inserted into the tank body of the resin tank (202) and cover the working surface of the optical assembly (203); The scraper mechanism (206) comprises at least one scraper (2062) and a scraper driving mechanism (2063), and is provided with a heating assembly (2064) for heating the scraper (2062); a plurality of first resin circulation holes (20621) for the resin to reciprocate are formed on the scraper (2062) and / or between adjacent scrapers (2062) in the movement direction of the scraper (2062); the scraper driving mechanism (2063) drives the scraper (2062) to reciprocate in the tank of the resin tank (202); The optical assembly (203), the scraper driving mechanism (2063), the vertical displacement mechanism (209) and the control system are signal connected; the control system controls the optical assembly (203) and the vertical displacement mechanism (209) to perform light-cured resin printing, performs resin stirring treatment every interval K based on received information, and performs resin heating treatment based on heating control analysis; The method for the control system to perform resin stirring treatment based on received information comprises the following steps: Step 101: obtaining resin type A, resin input amount B, current environment temperature T and current environment humidity H; Step 102: obtaining standard temperature T0 and standard environment humidity H0 corresponding to stirring treatment interval time K0 from a database based on resin type A and resin input amount B; Step 103: calculating current temperature difference TC=T-T0 and environment humidity difference HC=H-H0, and obtaining stirring time interval adjustment parameter D based on the following formula: ； In the formula, e is a natural constant, W is a temperature adjustment coefficient, and Q is a humidity adjustment coefficient; the temperature adjustment coefficient W and the humidity adjustment coefficient Q are obtained through pre-experiment according to different resin types; Step 104: determining the stirring treatment interval time K under the conditions of current environment temperature T and current environment humidity H by calculating K=D*K0, and performing resin stirring treatment every interval K. Step 105: When printing is started, steps 101-104 are performed once, and from the start of printing to the end of printing, the current ambient temperature T and the current ambient humidity H are obtained every preset time interval, and steps 103-104 are repeated, so that the newly obtained stirring processing interval time K' is used as the interval time for the next stirring processing.

2. The desktop level light solidification printer of claim 1, wherein, The pick-up mechanism (205) comprises a limiting block (2051) fixed above the resin tank (202), and a pick-up connecting assembly (2052) driven by a vertical displacement mechanism (209); a thimble plate (2053) is arranged below the pick-up connecting assembly (2052), and the top plate surface of the thimble plate (2053) covers at least a part of the bottom of the limiting block (2051); the thimble plate (2053) is provided with a plurality of downwardly arranged thimbles (20531); the forming substrate (204) is arranged below the thimble plate (2053) and is provided with thimble through holes (2042), and the number and position of the thimble through holes (2042) cover at least the plurality of thimbles (20531); A guide column (2041) is arranged on the side of the forming substrate (204) facing the thimble plate (2053), and a guide column hole (20532) matched with the guide column (2041) is arranged on the thimble plate (2053) at a position corresponding to the guide column (2041); the guide column (2041) is fixed or detachably fixed to the bottom of the pick-up connecting assembly (2052) through the guide column hole (20532); A spring (2054) is arranged between the top plate surface of the forming substrate (204) and the bottom plate surface of the thimble plate (2053).

3. The desktop level light solidification printer of claim 2, wherein, A second threaded through hole (20521) is arranged at the bottom of the pick-up connecting assembly (2052), a third threaded blind hole (20411) is arranged in the guide column (2041) in the vertical direction, and a second thread and a third thread are arranged on the first screw (2055) respectively corresponding to the second threaded hole (20521) and the third threaded hole (20411); the first screw (2055) is screwed and fastened to the second threaded through hole (20521) through the second thread, and is screwed and fastened to the third threaded blind hole (20411) through the third thread, so that the guide column (2041) and the bottom of the pick-up connecting assembly (2052) are detachably fixedly connected.

4. The desktop level light solidification printer of claim 1, wherein, The scraper mechanism (206) comprises a scraper fixing plate (2061), at least one scraper (2062), and a scraper driving mechanism (2063). The scraper fixing plate (2061) is provided with a scraper mounting groove, and the scraper (2062) is detachably mounted in the scraper mounting groove; the scraper mounting groove is provided with a second resin flow through hole (20612) matched with a first resin flow through hole (20621) of the scraper (2062) at the position of the first resin flow through hole (20621); the inner side of the scraper mounting groove is in contact with the scraper (2062) through a heat insulation layer; The scraper fixing plate (2061) is fixed or detachably fixed at one end of the scraper driving mechanism (2063) across one side wall of the resin tank (202), and is rotatably installed with a roller (20614) at the other end of the resin tank (202) across the opposite side wall of the resin tank (202); the roller (20614) moves along the printing platform (201) or the printing platform (201) plus the roller groove matched with the roller (20614). The scraper driving mechanism (2063) comprises a first driving device (20631) connected with the control system signal, a driving output end of the first driving device (20631) is fixedly or detachably connected with one end of a first screw rod (20632) arranged horizontally or approximately horizontally and drives the first screw rod (20632) to rotate, the other end of the first screw rod (20632) is rotatably connected with the printing platform (201); a scraper fixing plate connecting sleeve (20633) is screwed on the first screw rod (20632), and the scraper fixing plate connecting sleeve (20633) is fixedly or detachably connected with the scraper fixing plate (2061).

5. The desktop level light solidification printer of claim 1, wherein, The vertical displacement mechanism (209) comprises a limiting guide rail (2093) fixed on the printing platform (201) outside the resin tank (202) and arranged in the vertical direction, a guide rail sliding buckle (2095) is slidably connected with the limiting guide rail (2093), and the guide rail sliding buckle (2095) is fixedly connected with the connecting table (2094); a second driving device (2091) is fixedly connected with the top of the limiting guide rail (2093), the second driving device (2091) is connected with the control system signal, the driving output end thereof is downwardly arranged and fixedly or detachably connected with one end of a second screw rod (2092), the other end of the second screw rod (2092) is rotatably connected with a supporting platform at the bottom of the limiting guide rail (2093) and rotates under the driving of the second driving device (2091); the connecting table (2094) is provided with a fourth threaded hole screwed with the second screw rod (2092) at a position corresponding to the second screw rod (2092).

6. The desktop level photocuring printer according to claim 1, wherein, The printing assembly (2) further comprises a resin feeding and withdrawing mechanism (4); the resin feeding and withdrawing mechanism (4) comprises a first resin connecting pipe (401) in communication with one side bottom of the resin tank (202), the other end of the first resin connecting pipe (401) is in communication with one material port of a double-way pump (402) through a first buffer bottle; the other material port of the double-way pump (402) is in communication with a resin storage mechanism detachably fixed outside the protection assembly (1) through a second resin connecting pipe (403); and a control end of the double-way pump (402) is connected with the control system signal.

7. The desktop level photocuring printer according to claim 1, wherein, The printing assembly (2) further comprises a filtering mechanism (207); the filtering mechanism (207) comprises a fan and an air duct for guiding the air flow at the resin tank (202) to a filtering bag; the filtering bag comprises a filtering bag protection shell fixed or detachably fixed on the protection assembly (1) or the printing assembly (2), and the air duct is in communication with the fan and the inside of the filtering bag protection shell; the filtering bag is detachably fixed in the filtering bag protection shell; and the control end of the fan is signal-connected with the control system.

8. The desktop level photocuring printer according to claim 1, wherein, The printing assembly (2) further comprises a dual-light monitoring camera (3); the camera end of the dual-light monitoring camera (3) faces the inside space of the resin tank (202), and the signal output end is signal-connected with the control system.

9. The desktop level light solidification printer of claim 8, wherein, After receiving the data of the dual-light monitoring camera (3), the control system performs a supplementary stirring process, which comprises the following steps: Step 201: converting the input information of the dual-light monitoring camera (3) into an infrared radiation distribution map of the inside space of the resin tank (202); Step 202-A: judging the temperature distribution of each region in the inside space of the resin tank (202) based on the infrared radiation distribution map; if the difference between the highest temperature and the lowest temperature in the resin region exceeds a preset first resin temperature difference threshold, performing a resin stirring process once, and resetting the interval time for the next resin stirring process based on the stirring interval time K; Step 202-B: converting the infrared radiation distribution map of the inside space of the resin tank (202) into a temperature grid distribution map of the inside space of the resin tank (202) according to the preset grid lines; if the difference between the highest temperature and the lowest temperature in the adjacent preset number of grids in the resin region exceeds a preset second resin temperature difference threshold, performing a resin stirring process once, and resetting the interval time for the next resin stirring process based on the stirring interval time K; The steps 202-A and 202-B are performed alternatively or simultaneously.

10. The desktop level light solidification printer of claim 8, wherein, After receiving the data of the dual-light monitoring camera (3), the control system performs a heating control analysis, which comprises the following steps: Step 301: converting the input information of the dual-light monitoring camera (3) into an infrared radiation distribution map of the inside space of the resin tank (202); Step 302: judging the temperature distribution map of each region in the inside space of the resin tank (202) based on the infrared radiation distribution map; if the average temperature of the resin region is lower than a preset temperature threshold, the control system controls the heating assembly (2064) to start and performs a resin stirring process; Step 303: repeating step 302 until the average temperature of the resin region is higher than a preset post-heating temperature threshold, the control system controls the heating assembly (2064) to stop, controls the scraper (2062) to return to the initial position, and resets the interval time for the next resin stirring process based on the stirring interval time K; the preset post-heating temperature threshold is greater than or equal to the preset temperature threshold.

11. The desktop light-cured printer according to any one of claims 1, 9, 10, wherein, The method for determining the resin region comprises: covering the area of the forming substrate (204) in the resin tank (202) as a first excluded area; at this time, the part of the inside region of the resin tank (202) excluding the first excluded area is the resin region.

12. The desktop level light solidification printer of claim 11, wherein, The first exclusion zone is proportionally reduced to the opposite side of the dual-light monitoring camera (3) based on the angle of the dual-light monitoring camera (3) towards the resin tank (202) according to the increase of the height of the displacement part of the vertical displacement mechanism (209).

13. The desktop level light solidification printer of claim 11, wherein, The area where the printing surface of the optical assembly (203) is located in the resin tank (202) is taken as the second exclusion zone, and the exclusion zone is the cumulative area of the first exclusion zone and the second exclusion zone. The area of the resin tank (202) except the exclusion zone is the resin area.

14. The desktop light-cured printer according to any one of claims 1, 9, 10, wherein, The resin stirring process comprises the following steps: Step 401: control the optical assembly (203) to pause after completing the printing of the current layer; Step 402: control the vertical displacement mechanism (209) to drive the pick-up mechanism (205) and the forming substrate (204) to move upwards along the vertical direction to a target height, and record the upward stroke L; Step 403: control the scraper mechanism (206) to perform a preset number of reciprocating movements in the resin tank (202); Step 404: control the scraper mechanism (206) to return to the initial position; Step 405: control the vertical displacement mechanism (209) to drive the pick-up mechanism (205) and the forming substrate (204) to move downwards along the vertical direction, and the movement stroke is L; Step 406: control the optical assembly (203) to start and continue printing.

15. The desktop level photocuring printer according to claim 14, wherein, The target height in step 402 is: a preset height value; or, the target height U=U0+Ud+Uk, wherein U0 is the height of the scraper mechanism (206), Ud is the height of the upward movement of the vertical displacement mechanism (209) during printing, and Uk is an adjustment value greater than or equal to 0.

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