Industrial mold 3D printer based on plastic powder slurry

Abstract

The invention relates to the technical field of 3D printing, in particular to an industrial mold 3D printer based on plastic powder slurry. The printer comprises a rack, a movable frame and a printer body, and the printer body comprises a body, a flow guide pipe, a first heater, a cooling fan, a quantity adjusting assembly and a back suction assembly. According to the device, when the quantity adjusting rod drives the quantity adjusting head to be downwards inserted into the communicating position of the heating cavity and the nozzle to plug the nozzle, the quantity adjusting rod further drives the piston plate to move in the suction cavity, the piston plate firstly moves rightwards to expand the containing volume of the suction cavity to form negative pressure, and then material consumables left in the end of the nozzle are sucked into the suction cavity through the suction pipe; and then the piston plate moves leftwards to reset in the suction cavity to press the material consumables in the suction cavity into the flow dividing cavity through the one-way valve, so that the phenomenon that part of the material consumables left in the spraying end part of the nozzle flow out of the drawn wire to form overflow on the surface of the industrial mold is avoided, and the printing processing quality of the industrial mold is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing, in particular to an industrial mold 3D printer based on plastic powder slurry. Background Art

[0002] 3D printing, also known as additive manufacturing technology, is a technology that manufactures physical parts by adding materials layer by layer based on three-dimensional CAD data. The historical development of 3D printing technology is a process of continuous progress and expansion, from early rapid prototyping technology to today's widespread application, including industrial mold manufacturing. As an important part of production and manufacturing, industrial molds have a significant impact on product quality and efficiency, and the rise of 3D printing technology has provided new ideas and methods for the manufacture of industrial molds.

[0003] For example, CN118578664A involves a 3D printer, which includes a body, wherein the body includes a first driving mechanism, a first sliding block is slidably arranged on the first driving mechanism, a second driving mechanism is installed on the first sliding block, a second sliding block is slidably arranged on the second driving mechanism, and the sliding direction of the first sliding block is perpendicular to the sliding direction of the second sliding block; a plurality of first lifting motors are fixedly connected to the second sliding block, a fixing frame is fixed on the lifting plate of the first lifting motor, a first printing nozzle and a mounting frame are installed on the fixing frame, a third driving motor is installed on one side of the mounting frame, a third screw rod is drivingly connected to the output shaft of the third driving motor, and a third guide rail is also installed in the mounting frame. The 3D printer has the advantages of flexible adjustment of the printing nozzle and higher printing accuracy.

[0004] However, when using a 3D printer such as the one mentioned above to process and prepare industrial molds, when the print nozzle changes position or completes printing due to processing needs, although the nozzle is blocked, some material remaining in the spraying end of the nozzle will flow out and draw to form overflow on the surface of the industrial mold, thereby affecting the printing processing quality of the industrial mold.

[0005] In order to avoid the outflow of materials left in the nozzle affecting the mold processing quality, an industrial mold 3D printer based on plastic powder slurry is proposed. Summary of the invention

[0006] The object of the present invention is to provide an industrial mold 3D printer based on plastic powder slurry to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides an industrial mold 3D printer based on plastic powder slurry, comprising a frame, a movable frame, and a printer, wherein the movable frame is fixed in the frame to drive the printer to move up and down, forward and backward, and left and right, and the printer comprises a body, a guide tube, a first heater, a cooling fan, a volume adjustment component, and a back suction component;

[0008] The body includes a casing and a nozzle arranged at the bottom end of the casing, a connecting frame is arranged at the back of the casing, the casing is connected to the movable frame through the arranged connecting frame, a drainage cavity is provided in the casing, the bottom end of the guide pipe is connected to the top end of the drainage cavity for conveying material consumables, a heating cavity connected to the bottom end of the drainage cavity is also provided in the casing, the first heater is embedded in the casing for heating the material consumables in the heating cavity, the bottom end of the heating cavity is connected to the top end of the nozzle, and the cooling fan is arranged at the bottom end of the casing on both sides of the nozzle for cooling the material consumables;

[0009] A back-suction pipe is connected to the side wall of the nozzle, and a back-suction chamber is also provided in the casing. The bottom end of the back-suction chamber is connected to the nozzle through the back-suction pipe. The amount adjusting component and the back-suction component are both located in the casing. The amount adjusting component moves up and down in the casing to adjust the printing flow rate of the material consumables of the nozzle by changing the flow cross-sectional area in the nozzle, and when the amount adjusting component moves down to block the inside of the nozzle, it simultaneously drives the back-suction component to move back and forth, and the back-suction component then sucks the material consumables at the spraying end of the nozzle into the back-suction chamber through the back-suction pipe.

[0010] As a further improvement of the technical solution, the amount adjustment component includes a motor and an amount adjustment rod located in the heating chamber, the top end of the amount adjustment rod is threadedly connected to the driving shaft of the motor, the bottom end of the amount adjustment rod is provided with an amount adjustment head, the amount adjustment head is an inverted partial cone structure, and the connection between the heating chamber and the nozzle is a cavity structure that is wide at the top and narrow at the bottom, and the back-suction chamber is provided with a flow port connected to the heating chamber;

[0011] The back-suction assembly includes a first bracket and a second bracket arranged on the first bracket, one end of the top of the first bracket is connected to the adjusting rod, a control panel is arranged on the second bracket, the control panel is located in the flow port, and a first plate opening is opened on the flow port.

[0012] As a further improvement of the technical solution, the first plate opening is a variable diameter groove which is wider at the top and narrower at the bottom.

[0013] As a further improvement of the technical solution, a balancing body is provided on the adjusting rod above the adjusting head, a receiving cavity is provided at the inner bottom of the balancing body, and a balancing membrane for balancing the pressure in the heating cavity is provided in the receiving cavity.

[0014] As a further improvement of the technical solution, the balance membrane is a pressure balance membrane made of EPTFE material.

[0015] As a further improvement of the technical solution, an intra-cavity partition is arranged near the top position in the heating cavity, and a baffle is correspondingly arranged on the adjusting rod, and the size of the baffle is larger than the flow groove of the intra-cavity partition.

[0016] As a further improvement of the technical solution, a transverse partition is provided in the middle of the back-suction chamber, the space above the transverse partition in the back-suction chamber is a diversion chamber, the diversion chamber is connected with the flow port, the space below the transverse partition in the back-suction chamber is a suction chamber, the bottom of the suction chamber is connected with the back-suction pipe, and a one-way valve is provided on the partition to limit the one-way flow of material consumables from the suction chamber into the diversion chamber;

[0017] The back-suction assembly also includes an end frame connected to the inner wall of the casing for sliding up and down connection and a piston plate located in the suction chamber, a sliding groove is provided on the side of the piston plate, the top end of the end frame is connected to a spring arranged at the bottom end of the first bracket, and the end frame is slidably connected to the sliding groove.

[0018] As a further improvement of the present technical solution, an extension plate connected to the casing is arranged on the return suction pipe, the bottom end of the second bracket is located in the extension plate, and a bracket opening is provided on the bottom end surface of the second bracket, and a second plate opening is provided on the surface of the control panel above the first plate opening, and the second plate opening matches the size of the circulation port.

[0019] As a further improvement of the technical solution, a processing chamber is provided in the casing above the diversion chamber, the top of the processing chamber is connected to an external recovery device through a pipeline, and a floating plate is provided at the connection between the bottom of the processing chamber and the top of the diversion chamber.

[0020] As a further improvement of the present technical solution, the material consumable is plastic powder slurry.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. In the industrial mold 3D printer based on plastic powder slurry, the driving shaft of the motor drives the adjusting rod to move downward, and the adjusting head is close to the connection between the heating chamber and the nozzle to reduce the flow cross-sectional area of ​​the logistics consumables. At the same time, the downward movement of the adjusting rod also drives the first bracket and then drives the second bracket to move, so that the control board moves down and the first plate port begins to connect with the flow port, and the material consumables in the heating chamber can be diverted into the re-suction chamber for temporary storage, that is, by reducing the flow cross-sectional area and diverting the material consumables, the flow at the nozzle end is reduced, and the effect of adjusting the flow at the nozzle end is achieved. When printing the details, a smaller flow rate is used to ensure the clarity of the details, while when printing a large area of ​​the plane, a larger flow rate is required to improve efficiency.

[0023] 2. In the industrial mold 3D printer based on plastic powder slurry, when the metering rod drives the metering head to be inserted downward into the connection between the heating chamber and the nozzle to seal the nozzle, the first bracket connected to the metering rod drives the end bracket to move downward, and the protrusion of the end bracket then moves along the sliding groove to the lower dead point of the sliding groove. The piston plate will be driven to move right first in the suction chamber, expanding the accommodation volume of the suction chamber to form a negative pressure, and then the material consumables remaining in the nozzle end are sucked into the suction chamber through the back suction pipe, and then the piston plate moves to the left in the suction chamber to reset and press the material consumables in the suction chamber into the diversion chamber through the one-way valve, thereby avoiding the phenomenon that some material consumables remaining in the ejection end of the nozzle flow out and draw to form overflow on the surface of the industrial mold, thereby ensuring the printing and processing quality of the industrial mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the structure of the printer of the present invention;

[0026] Figure 3 is a cross-sectional structural diagram of a printer of the present invention;

[0027] Figure 4 It is a cross-sectional structural diagram of the main body of the present invention;

[0028] Figure 5 for Figure 4 A schematic diagram of the structure enlargement in the middle;

[0029] Figure 6 It is a schematic diagram of the structure of the volume adjustment component of the present invention;

[0030] Figure 7 It is a cross-sectional structural diagram of the balance body of the present invention;

[0031] Figure 8 The back suction component structure of the present invention Figure 1 ;

[0032] Fig. 9The back suction component structure of the present invention Figure 2 ;

[0033] Fig.10 The back suction component structure of the present invention Figure 3 ;

[0034] Fig.11 It is a schematic diagram of the working state of the printer of the present invention.

[0035] The meaning of each number in the figure is:

[0036] 1. Frame;

[0037] 2. Movable rack;

[0038] 3. Printer; 31. Main body; 311. Casing; 3111. Drainage chamber; 3112. Heating chamber; 3113. Inner chamber baffle; 312. Nozzle; 313. Back suction pipe; 314. Back suction chamber; 3141. Flow port; 3142. One-way valve; 3143. Floating plate; 315. Processing chamber; 316. Extension plate; 32. Drainage pipe; 33. First heater; 34. Cooling fan; 35. Adjustment assembly; 351 , motor; 352, adjusting rod; 353, adjusting head; 354, baffle; 355, balancing body; 3551, accommodating chamber; 3552, balancing membrane; 36, suction assembly; 361, first bracket; 3611, spring; 362, second bracket; 3621, bracket mouth; 363, end bracket; 364, piston plate; 3641, sliding groove; 365, control board; 3651, first plate mouth; 3652, second plate mouth. DETAILED DESCRIPTION

[0039] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0042] In the traditional industrial mold manufacturing process, most of the traditional metal processing technology is used, which requires multiple complex processes such as milling, grinding and polishing. This process is not only cumbersome, but also costly and time-consuming, resulting in a long manufacturing cycle, which cannot meet the needs of modern fast-paced production. The traditional manufacturing process is also limited by the complex structure and shape of the mold, making it difficult to ensure the accuracy and quality of the mold.

[0043] Compared with traditional industrial mold manufacturing, 3D printing technology has unique advantages. 3D printing technology can achieve rapid manufacturing. Relying on the rapid manufacturing capabilities of 3D printing technology, molds can be directly manufactured through digital models, and sample molds can be quickly manufactured without complex intermediate processes. Form verification and function verification can be performed in the early stages of product development, improving product development efficiency.

[0044] The molds made by 3D printing technology can realize complex structures and shapes, providing more possibilities for product development. Furthermore, the materials of 3D printing technology are highly plastic, and can produce high-precision and high-quality molds. 3D printing technology can also flexibly repair and modify molds, reducing the cost and risk of mold manufacturing, greatly shortening the manufacturing cycle, and is not limited by traditional manufacturing processes. It can meet the mold manufacturing of more special needs.

[0045] However, when the existing 3D printers are used to process and prepare industrial molds, when the print nozzle changes position or completes printing due to processing needs, although the nozzle is blocked, some of the material remaining in the ejection end of the nozzle will flow out and draw to form overflow on the surface of the industrial mold (overflow phenomenon refers to the molten plastic material flowing out of the printer's nozzle during the printing process, and forming excess plastic filaments or drips around the print. This phenomenon usually occurs when the printer's nozzle moves to a new position or ends printing. Since the plastic at the nozzle fails to cool and solidify in time, the plastic continues to flow out and overflows), thereby affecting the printing quality of the industrial mold.

[0046] Therefore, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, the purpose of this embodiment is to provide an industrial mold 3D printer based on plastic powder slurry, including a frame 1, a movable frame 2, and a printer 3. The movable frame 2 is fixed in the frame 1 to drive the printer 3 to move up and down, forward and backward, and left and right;

[0047] The printer 3 includes a body 31, a guide tube 32, a first heater 33, a cooling fan 34, a volume adjustment component 35 and a back-suction component 36. The body 31 includes a housing 311 and a nozzle 312 arranged at the bottom of the housing 311. A connecting frame is arranged at the back of the housing 311. The housing 311 is connected to the movable frame 2 through the arranged connecting frame. A drainage cavity 3111 is provided in the housing 311. The bottom end of the guide tube 32 is connected to the top end of the drainage cavity 3111 for conveying material consumables. A heating cavity 3112 connected to the bottom end of the drainage cavity 3111 is also provided in the housing 311. The first heater 33 is embedded in the housing 311 for heating the material consumables in the heating cavity 3112. The bottom end of the heating cavity 3112 is connected to the top end of the nozzle 312. The cooling fan 34 is arranged at the bottom end of the housing 311 on both sides of the nozzle 312 for cooling the material consumables, so that the material consumables are cooled. The side wall of the nozzle 312 is connected with a back-suction pipe 313, and a back-suction chamber 314 is also provided in the housing 311. The bottom end of the back-suction chamber 314 is connected with the nozzle 312 through the back-suction pipe 313. The amount adjustment component 35 and the back-suction component 36 are both located in the housing 311. The amount adjustment component 35 moves up and down in the housing 311 to adjust the printing flow of the material consumables of the nozzle 312 by changing the flow cross-sectional area in the nozzle 312, and when the amount adjustment component 35 moves down to block the inside of the nozzle 312, it simultaneously drives the back-suction component 36 to move back and forth. The back-suction component 36 then draws the material consumables at the ejection end of the nozzle 312 into the back-suction chamber 314 through the back-suction pipe 313, so that when the printer 3 changes position or completes printing, it can avoid the phenomenon that part of the material consumables left in the ejection end of the nozzle 312 flows out and draws to form overflow on the surface of the industrial mold, which can ensure the printing processing quality of the industrial mold.

[0048] The above structure is disclosed as follows:

[0049] The material consumables are input into the heating chamber 3112 through the guide tube 32 on the frame 1 through the drainage chamber 3111. Under the heating of the first heater 33, the material consumables are converted into liquid and then flow out from the nozzle 312 and quickly solidify into shape under the cooling of the cooling fan 34. During the entire printing process, the movable frame 2 will drive the main body 31 to move, so that the material consumables flowing out of the nozzle 312 are stacked layer by layer according to the information in the slicing file, and a three-dimensional entity is gradually constructed.

[0050] When printing industrial molds, in order to balance the quality and efficiency of the printed parts, a smaller flow rate is required when printing the details to ensure the clarity of the details, while a larger flow rate is required when printing large-area flat surfaces to improve efficiency. Figure 6 , Figure 7 , Figure 8 , Fig. 9 As shown, the amount adjustment component 35 includes a motor 351 arranged at the top of the housing 311 and an amount adjustment rod 352 located in the heating chamber 3112. The top of the amount adjustment rod 352 is threadedly connected to the driving shaft of the motor 351. The bottom of the amount adjustment rod 352 is provided with an amount adjustment head 353. The amount adjustment head 353 is an inverted partial cone structure. The connection between the heating chamber 3112 and the nozzle 312 is a cavity structure that is wide at the top and narrow at the bottom. The back-suction chamber 314 is provided with a flow port 3141 connected to the heating chamber 3112.

[0051] The back-suction assembly 36 includes a first bracket 361 and a second bracket 362 arranged on the first bracket 361. The first bracket 361 and the second bracket 362 are both "L"-shaped structures. One end of the top of the first bracket 361 is connected to the adjusting rod 352. The second bracket 362 is provided with a control board 365. The control board 365 is located in the circulation port 3141. The circulation port 3141 is provided with a first plate port 3651. When printing, the first plate port 3651 is not connected to the circulation port 3141. At this time, the material consumables cannot enter the back-suction chamber 314 from the heating chamber 3112. The material consumables normally pass through the heating chamber 3112. 12 and the connection between the nozzle 312 and then flows out from the end of the nozzle 312. When the end flow of the nozzle 312 needs to be adjusted, the driving shaft of the motor 351 drives the adjusting rod 352 to move downward, so that the adjusting head 353 at the bottom of the adjusting rod 352 is close to the connection between the heating chamber 3112 and the nozzle 312 to reduce the flow cross-sectional area of ​​the logistics consumables. At the same time, the downward movement of the adjusting rod 352 also drives the first bracket 361 and then drives the second bracket 362 to move, so that the control plate 365 moves downward and the first plate port 3651 begins to communicate with the flow port 3141, and the material consumables in the heating chamber 3112 can be diverted into the back-suction chamber 3 14, that is, by reducing the flow cross-sectional area and reducing the flow rate at the end of the nozzle 312 by diverting the material consumables, the effect of adjusting the flow rate at the end of the nozzle 312 is achieved. Furthermore, the first plate opening 3651 is a variable diameter groove that is wide at the top and narrow at the bottom. When adjusting the flow rate, the closer the regulating head 353 is to the connection between the heating chamber 3112 and the nozzle 312, the smaller the flow cross-sectional area, and the corresponding connection area between the first plate opening 3651 and the flow opening 3141 is larger, so that the flow rate of the material consumables diverted into the back-suction chamber 314 is dynamically adjusted, and the regulating rod 352 is provided with a balancing body 353 above the regulating head 353. 55. A receiving chamber 3551 is provided at the bottom of the balancing body 355. A balancing membrane 3552 for balancing the pressure in the heating chamber 3112 is provided in the balancing chamber 3551. The balancing membrane 3552 is a pressure balancing membrane made of EPTFE. When the pressure in the heating chamber 3112 increases, the balancing membrane 3552 can adaptively deform toward the receiving chamber 3551, thereby avoiding the uncontrolled increase in the flow rate of the material consumables at the end of the nozzle 312 due to the increase in the pressure at the connection between the heating chamber 3112 and the nozzle 312 due to the decrease in the flow cross-sectional area, thereby ensuring the stable outflow of the material consumables at the end of the nozzle 312.

[0052] Among them, the optimal working temperature when the material consumables are heated is about 200°C, and the pressure balance membrane made of EPTFE material has excellent high temperature resistance and can operate in the range of -200°C to +260°C. This temperature range allows the ePTFE membrane to maintain good performance even under extreme environmental conditions without melting or deformation. Therefore, in this embodiment, the balance membrane 3552 preferably uses a pressure balance membrane made of EPTFE material.

[0053] When changing positions or completing printing, the nozzle 312 needs to be blocked to prevent some material consumables from remaining in the ejection end of the nozzle 312 from flowing out and drawing to form overflow on the surface of the industrial mold. An intra-cavity partition 3113 is arranged near the top position in the heating chamber 3112, and a baffle 354 is correspondingly arranged on the adjusting rod 352. The size of the baffle 354 is larger than the flow groove of the intra-cavity partition 3113. When the adjusting rod 352 drives the adjusting head 353 to move downward to block the connection between the heating chamber 3112 and the nozzle 312 to block the nozzle 312, the baffle 354 just covers the flow groove of the intra-cavity partition 3113, so that the material consumables continuously input by the guide tube 32 will not enter the back-suction chamber 314 through the heating chamber 3112, thereby occupying the space of the back-suction chamber 314.

[0054] In addition, if Figure 4 , Figure 8 , Fig. 9 , Fig.10 As shown, a transverse partition is provided in the middle of the back-suction chamber 314, the space above the transverse partition in the back-suction chamber 314 is a diversion chamber, the diversion chamber is connected with the flow port 3141, the space below the transverse partition in the back-suction chamber 314 is a suction chamber, the bottom of the suction chamber is connected with the back-suction pipe 313, and a one-way valve 3142 is provided on the partition to limit the one-way flow of materials from the suction chamber into the diversion chamber;

[0055] The suction assembly 36 also includes an end frame 363 slidably connected to the inner wall of the housing 311 and a piston plate 364 located in the suction chamber. A sliding groove 3641 of a quadrilateral structure is provided on the side of the piston plate 364. The top of the end frame 363 is connected to a spring 3611 provided at the bottom of the first bracket 361. A protrusion is provided on the side wall of the bottom end of the end frame 363. The protrusion is located in the sliding groove 3641. The end frame 363 is slidably connected to the sliding groove 3641 through the provided protrusion. Fig.11 As shown by the middle arrow a, when the adjusting rod 352 drives the adjusting head 353 to be inserted downward into the connection between the heating chamber 3112 and the nozzle 312 to block the nozzle 312, the first bracket 361 connected to the adjusting rod 352 drives the end bracket 363 to move downward, and the protrusion of the end bracket 363 then moves along the sliding groove 3641 to the lower dead point of the sliding groove 3641, as shown in FIG. Fig.11 As shown by the middle arrow b, during the movement of the end frame 363, the piston plate 364 will be driven to move right first in the suction chamber, thereby expanding the capacity of the suction chamber to form a negative pressure, and then the material consumables remaining in the end of the nozzle 312 are sucked into the suction chamber through the return suction pipe 313, and then the piston plate 364 moves to the left in the suction chamber to reset and press the material consumables in the suction chamber into the diversion chamber through the one-way valve 3142, thereby avoiding the phenomenon that some material consumables remaining in the ejection end of the nozzle 312 flow out and draw to form overflow on the surface of the industrial mold, thereby ensuring the printing processing quality of the industrial mold.

[0056] It is worth noting that in order to prevent the material consumables in the nozzle 312 from flowing into the suction chamber through the back-suction pipe 313 and affecting the outflow of the material consumables from the nozzle 312 when the regulating head 353 normally adjusts the spray flow rate of the nozzle end 312, and to prevent the material consumables from flowing into the nozzle 312 through the back-suction pipe 313 when the piston plate 364 moves left to press the material consumables in the suction chamber into the diversion chamber, an extension plate 316 connected to the casing 311 is provided on the back-suction pipe 313, the bottom end of the second bracket 362 is located in the extension plate 316, and a bracket opening 3621 is provided on the bottom end surface of the second bracket 362, and a second plate opening 3652 is provided on the surface of the control plate 365 above the first plate opening 3651, and the second plate opening 3652 matches the size of the flow opening 3141. When the regulating rod 352 drives the regulating head 353 to approach or move away from the connection between the heating chamber 3112 and the nozzle 312 to adjust the flow rate at the end of the nozzle 312, the regulating rod 352 The measuring rod 352 will simultaneously drive the second bracket 362 to move through the first bracket 361, so that the bracket opening 3621 set at the bottom end of the second bracket 362 is not connected to the back-suction pipe 313. At this time, the material consumables in the nozzle 312 cannot enter the suction chamber through the back-suction pipe 313. When the nozzle 312 is blocked and the piston plate 364 moves to the right, the adjusting rod 352 will drive the second bracket 362 to move downward, so that the bracket opening 3621 is connected to the back-suction pipe 313, so that the material consumables in the nozzle 312 are sucked into the suction chamber. When the piston plate 364 moves to the left, the adjusting rod 352 will continue to drive the second bracket 362 to move downward, so that the bracket opening 3621 is not connected to the back-suction pipe 313. At this time, the material consumables in the suction chamber can only be pressed into the diversion chamber through the one-way valve 3142, and the second plate opening 3652 is just aligned with the flow opening 3141, so that the material consumables in the diversion chamber can flow back into the heating chamber 3112.

[0057] like Figure 4 , Figure 5 As shown, due to the limited space in the diversion chamber, the amount of material consumables that can be accommodated is also limited. When the material consumables accumulated in the diversion chamber are large, the material consumables in the diversion chamber need to be recovered. A processing chamber 315 is provided in the casing 311 above the diversion chamber. The top of the processing chamber 315 is connected to an external recovery device through a pipeline. A floating plate 3143 is provided at the connection between the bottom of the processing chamber 315 and the top of the diversion chamber. Under normal circumstances, the floating plate 3143 blocks the connection between the processing chamber 315 and the diversion chamber to prevent impurities from entering the diversion chamber. When the material consumables in the diversion chamber increase, the material consumables push the floating plate 3143 upward and then flow into the processing chamber 315. The material consumables in the processing chamber 315 can be recovered through an external recovery device and a pipeline. In this embodiment, plastic powder slurry is selected as the material consumable. The advantage of using plastic powder slurry as the material consumable is that the raw material has a high density, can be melted or melted more quickly, contains less impurities, and can ensure the printing processing quality of industrial molds.

[0058] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. Industrial mold 3D printer based on plastic powder slurry, characterized by: The invention comprises a frame (1), a movable frame (2), and a printer (3), wherein the movable frame (2) is fixed in the frame (1) and is used to drive the printer (3) to move up and down, forward and backward, and left and right, and is characterized in that the printer (3) comprises a body (31), a guide tube (32), a first heater (33), a cooling fan (34), a volume adjustment component (35), and a suction component (36); The body (31) comprises a casing (311) and a nozzle (312) arranged at the bottom end of the casing (311); a connecting frame is arranged at the back of the casing (311); the casing (311) is connected to the movable frame (2) via the connecting frame; a drainage chamber (3111) is provided in the casing (311); the bottom end of the guide pipe (32) is connected to the top end of the drainage chamber (3111) for conveying material consumables; a heating chamber (3112) is also provided in the casing (311) and is connected to the bottom end of the drainage chamber (3111); the first heater (33) is embedded in the casing (311) for heating the material consumables in the heating chamber (3112); the bottom end of the heating chamber (3112) is connected to the top end of the nozzle (312); and the cooling fan (34) is arranged at the bottom end of the casing (311) and located on both sides of the nozzle (312) for cooling the material consumables; The side wall of the nozzle (312) is connected to a back-suction pipe (313), and a back-suction chamber (314) is further provided in the housing (311). The bottom end of the back-suction chamber (314) is connected to the nozzle (312) through the back-suction pipe (313). The amount adjustment component (35) and the back-suction component (36) are both located in the housing (311). The amount adjustment component (35) moves up and down in the housing (311) to adjust the printing flow rate of the material consumables of the nozzle (312) by changing the flow cross-sectional area in the nozzle (312). When the amount adjustment component (35) moves downward to block the inside of the nozzle (312), it simultaneously drives the back-suction component (36) to move back and forth. The back-suction component (36) then sucks the material consumables at the spraying end of the nozzle (312) into the back-suction chamber (314) through the back-suction pipe (313).

2. The industrial mold 3D printer based on plastic powder slurry according to claim 1, characterized in that: The amount adjustment component (35) comprises a motor (351) and an amount adjustment rod (352) located in the heating chamber (3112); the top end of the amount adjustment rod (352) is threadedly connected to the drive shaft of the motor (351); the bottom end of the amount adjustment rod (352) is provided with an amount adjustment head (353); the amount adjustment head (353) is an inverted partially conical structure; the connection point between the heating chamber (3112) and the nozzle (312) is a cavity structure that is wide at the top and narrow at the bottom; the back-suction chamber (314) is provided with a flow port (3141) that is connected to the heating chamber (3112); The back-sucking assembly (36) comprises a first bracket (361) and a second bracket (362) arranged on the first bracket (361); one end of the top of the first bracket (361) is connected to the adjusting rod (352); a control panel (365) is arranged on the second bracket (362); the control panel (365) is located in the flow port (3141); and a first panel opening (3651) is opened on the flow port (3141).

3. The industrial mold 3D printer based on plastic powder slurry according to claim 2, characterized in that: The first plate opening (3651) is a diameter-changing groove that is wider at the top and narrower at the bottom.

4. The industrial mold 3D printer based on plastic powder slurry according to claim 2, characterized in that: The adjusting rod (352) is provided with a balancing body (355) located above the adjusting head (353); a receiving cavity (3551) is provided at the bottom of the balancing body (355); and a balancing membrane (3552) for balancing the pressure in the heating cavity (3112) is provided in the receiving cavity (3551).

5. The industrial mold 3D printer based on plastic powder slurry according to claim 4, characterized in that: The balance membrane (3552) is a pressure balance membrane made of EPTFE material.

6. The industrial mold 3D printer based on plastic powder slurry according to claim 2, characterized in that: An intra-cavity partition (3113) is provided near the top end of the heating cavity (3112), and a baffle (354) is correspondingly provided on the adjusting rod (352), wherein the size of the baffle (354) is larger than the flow slot of the intra-cavity partition (3113).

7. The industrial mold 3D printer based on plastic powder slurry according to claim 2, characterized in that: A transverse partition is provided in the middle of the back-suction chamber (314); the space above the transverse partition in the back-suction chamber (314) is a diversion chamber, the diversion chamber is in communication with the flow port (3141); the space below the transverse partition in the back-suction chamber (314) is a suction chamber, the bottom of the suction chamber is in communication with the back-suction pipe (313), and a one-way valve (3142) is provided on the partition to limit the one-way flow of consumable materials from the suction chamber into the diversion chamber; The suction back assembly (36) further comprises an end frame (363) slidably connected to the inner wall of the housing (311) up and down, and a piston plate (364) located in the suction chamber, a sliding groove (3641) is provided on the side of the piston plate (364), the top end of the end frame (363) is connected to a spring (3611) provided at the bottom end of the first frame (361), and the end frame (363) is slidably connected to the sliding groove (3641).

8. The industrial mold 3D printer based on plastic powder slurry according to claim 7, characterized in that: The return suction pipe (313) is provided with an extension plate (316) connected to the housing (311); the bottom end of the second bracket (362) is located in the extension plate (316), and a bracket opening (3621) is provided on the bottom surface of the second bracket (362); a second plate opening (3652) is provided on the surface of the control panel (365) above the first plate opening (3651); the second plate opening (3652) matches the size of the circulation port (3141).

9. The industrial mold 3D printer based on plastic powder slurry according to claim 7, characterized in that: A processing chamber (315) is provided in the housing (311) above the diversion chamber. The top of the processing chamber (315) is connected to an external recovery device via a pipeline. A floating plate (3143) is provided at the connection between the bottom of the processing chamber (315) and the top of the diversion chamber.

10. The industrial mold 3D printer based on plastic powder slurry according to claim 1, characterized in that: The material consumables are plastic powder slurry.

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