Industrial mold 3D printer based on plastic powder slurry

Abstract

The present invention relates to the field of 3D printing technology, and more specifically, to an industrial mold 3D printer based on plastic powder slurry. The printer comprises a frame, a movable frame, and a printer, and the printer comprises a body, a guide tube, a first heater, a cooling fan, a metering assembly, and a back-suction assembly. In the present invention, when the metering rod drives the metering head downward to be inserted into the connection between the heating chamber and the nozzle to seal the nozzle, the metering rod then drives the piston plate to move in the suction chamber, first moving right to expand the holding volume of the suction chamber to form a negative pressure, and then sucking the material consumables remaining in the nozzle end into the suction chamber through the back-suction pipe, and then the piston plate moves 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 processing quality of the industrial mold.

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, is a technology that creates physical parts based on three-dimensional CAD data by adding material layer by layer. The historical development of 3D printing technology has been one of continuous advancement and expansion, from early rapid prototyping techniques to its current widespread application, including in industrial mold manufacturing. As a crucial component of manufacturing, industrial molds have a significant impact on product quality and efficiency. The rise of 3D printing technology has provided new ideas and methods for industrial mold manufacturing.

[0003] For example, CN118578664A relates to a 3D printer comprising a body, wherein the body includes a first drive mechanism, a first sliding block slidably mounted on the first drive mechanism, a second drive mechanism mounted on the first sliding block, a second sliding block slidably mounted on the second drive mechanism, the sliding direction of the first sliding block being perpendicular to the sliding direction of the second sliding block; a plurality of first lifting motors fixedly connected to the second sliding block, a fixed frame fixed to the lifting plate of the first lifting motor, a first print head and a mounting frame mounted on the fixed frame, a third drive motor mounted on one side of the mounting frame, a third screw connected to the output shaft of the third drive motor in a transmission manner, and a third guide rail mounted within the mounting frame. This 3D printer offers the advantages of flexible print head adjustment 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 due to processing needs or completes printing, although the nozzle is blocked, some material remaining in the ejection end of the nozzle will flow out and draw wires 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 material 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 objectives, 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 within the frame and is used 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 main body includes a casing and a nozzle arranged at the bottom end of the casing, a connecting frame is provided at the back of the casing, the casing is connected to the movable frame through the provided connecting frame, a drainage chamber is provided in the casing, the bottom end of the guide tube is connected to the top end of the drainage chamber for conveying material consumables, a heating chamber connected to the bottom end of the drainage chamber is also provided in the casing, the first heater is embedded in the casing for heating the material consumables in the heating chamber, the bottom end of the heating chamber is connected to the top end of the nozzle, and the cooling fan is provided at the bottom end of the casing on both sides of the nozzle for cooling the material consumables;

[0009] The side wall of the nozzle is connected to a back-suction pipe, and a back-suction chamber is also provided in the housing. The bottom end of the back-suction chamber is connected to the nozzle through the back-suction pipe. The amount adjustment component and the back-suction component are both located in the housing. The amount adjustment component moves up and down in the housing 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 adjustment 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 draws the material consumables at the ejection end of the nozzle into the back-suction chamber through the back-suction pipe.

[0010] As a further improvement of the present technical solution, the amount adjustment component includes a motor and an amount adjustment rod located in the heating chamber, the top of the amount adjustment rod is threadedly connected to the drive shaft of the motor, the bottom 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 provided on the second bracket. The control panel is located in the flow port. A first plate opening is opened on the flow port.

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

[0013] As a further improvement of the present technical solution, a balancing body is provided at 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 present technical solution, the balance membrane is a pressure balance membrane made of EPTFE material.

[0015] As a further improvement of the present technical solution, an intra-cavity partition is provided near the top position in the heating cavity, and a baffle is correspondingly provided 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 present 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 to 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 to the back-suction pipe, and a one-way valve is provided on the partition to limit the one-way flow of materials and consumables from the suction chamber into the diversion chamber;

[0017] The back-suction assembly also includes an end frame that is slidably connected to the inner wall of the casing and a piston plate located in the suction chamber. A sliding groove is provided on the side of the piston plate. The top of the end frame is connected to the spring set 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 provided 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 flow port.

[0019] As a further improvement of the present 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 downward and the first plate opening begins to connect with the flow port. 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, thereby achieving the effect of adjusting the flow at the nozzle end. When printing detailed parts, a smaller flow rate is used to ensure the clarity of the details, while when printing large-area planes, 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 holding 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. Then the piston plate moves left and resets in the suction chamber to 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 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 according to the present invention;

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

[0028] Figure 5 for Figure 4 A schematic diagram of the structure at center A;

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

[0030] Figure 7 This 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] Figure 9The back suction component structure of the present invention Figure 2 ;

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

[0034] Figure 11 This 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. Housing; 3111. Drainage chamber; 3112. Heating chamber; 3113. Intracavity partition; 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. Drain pipe; 33. First heater; 34. Cooling fan; 35. Volume control assembly; 351 , motor; 352, adjusting rod; 353, adjusting head; 354, baffle; 355, balancing body; 3551, accommodating chamber; 3552, balancing membrane; 36, back 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 clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making any creative efforts shall fall 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 to 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, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0042] Traditional industrial mold manufacturing relies heavily on traditional metalworking techniques, requiring multiple complex steps such as milling, grinding, and polishing. This process is not only cumbersome and costly, but also time-consuming, resulting in a lengthy manufacturing cycle that cannot meet the demands of modern, fast-paced production. Traditional manufacturing processes are also limited by the complex structure and shape of the mold, making it difficult to guarantee mold precision and quality.

[0043] Compared to traditional industrial mold manufacturing, 3D printing technology offers unique advantages. It enables rapid manufacturing. By leveraging this rapid manufacturing capability, molds can be directly manufactured from digital models, enabling rapid production of prototype molds without the need for complex intermediate processes. This allows for form and function verification in the early stages of product development, significantly improving product development efficiency.

[0044] Molds created using 3D printing technology can achieve complex structures and shapes, expanding product development possibilities. Furthermore, the highly malleable materials used in 3D printing enable the production of high-precision, high-quality molds. 3D printing technology also allows for flexible mold repair and modification, reducing the cost and risk of mold manufacturing and significantly shortening manufacturing cycles. Free from the limitations of traditional manufacturing processes, it can meet the needs of a wider range of specialized mold manufacturing requirements.

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

[0046] Therefore, see 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 and is used 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, an adjustment component 35 and a back-suction component 36. The body 31 includes a housing 311 and a nozzle 312 arranged at the bottom end of the housing 311. A connecting frame is provided on the back of the housing 311. The housing 311 is connected to the movable frame 2 through the provided connecting frame. A drainage chamber 3111 is provided in the housing 311. The bottom end of the guide tube 32 is connected to the top end of the drainage chamber 3111 for conveying material consumables. A heating chamber 3112 connected to the bottom end of the drainage chamber 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 chamber 3112. The bottom end of the heating chamber 3112 is connected to the top end of the nozzle 312. The cooling fan 34 is provided 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. After shaping, a back-suction pipe 313 is connected to the side wall of the nozzle 312, and a back-suction chamber 314 is also opened 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 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 as to avoid the phenomenon that some material consumables left in the ejection end of the nozzle 312 flow out and draw to form overflow on the surface of the industrial mold when the printer 3 changes position or completes printing, thereby ensuring the printing processing quality of the industrial mold.

[0048] The above structure is disclosed below:

[0049] The material consumables are input into the heating chamber 3112 through the guide tube 32 on the frame 1 and then through the drainage chamber 3111. Under the heating of the first heater 33, the material consumables are converted into liquid and then flow out of the nozzle 312. After that, they are quickly solidified and formed 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 detailed parts 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 、 Figure 9 As shown, the amount adjustment component 35 includes a motor 351 disposed 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 drive 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 partially conical 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 that is 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 pass through the heating chamber 3112 normally. 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 end 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 diverting the material consumables, the flow at the end of the nozzle 312 is reduced to achieve the effect of adjusting the flow at the end of the nozzle 312. 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, 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, dynamically adjusting the flow size of the material consumables diverted into the back-suction chamber 314, and the regulating rod 352 is provided with a balancing body 3 above the regulating head 353. 55. A accommodating chamber 3551 is provided at the bottom of the balancing body 355. A balancing membrane 3552 is provided in the accommodating chamber 3551 for balancing the pressure in the heating chamber 3112. 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 into the accommodating 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 pressure at the connection between the heating chamber 3112 and the nozzle 312 due to the reduction 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 heating the material consumables is about 200°C, and the pressure balancing membrane made of EPTFE 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 balancing membrane 3552 preferably uses a pressure balancing membrane made of EPTFE.

[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 provided near the top position in the heating chamber 3112, and a baffle 354 is provided 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 、 Figure 9 、 Figure 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, which is connected to the flow port 3141. The space below the transverse partition in the back-suction chamber 314 is a suction chamber, and the bottom of the suction chamber is connected to the back-suction pipe 313. 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 back-suction assembly 36 also includes an end frame 363 that is slidably connected to the inner wall of the housing 311 and a piston plate 364 located in the suction chamber. A quadrilateral sliding groove 3641 is provided on the side of the piston plate 364. The top of the end frame 363 is connected to the 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. Figure 11 As shown by the arrow a in the middle, 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 bottom dead point of the sliding groove 3641, as shown in FIG. Figure 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] After the bottle 312 is in the bottle, the bottle 312 will be turned away from the bottle and the bottle will not flow out of the bottle. When the nozzle 312 is blocked and the piston plate 364 moves to the right, the adjusting rod 352 drives the second bracket 362 to move downward, so that the bracket opening 3621 is connected to the back suction pipe 313, thereby allowing the material consumables in the nozzle 312 to be sucked into the suction chamber. When the piston plate 364 moves to the left, the adjusting rod 352 continues 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 diverter chamber through the one-way valve 3142, and the second plate opening 3652 is exactly aligned with the flow opening 3141, so that the material consumables in the diverter 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 a large amount of material consumables accumulates in the diversion chamber, the material consumables in the diversion chamber need to be recycled. 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 recycled through an external recovery device and 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 to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended 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 back-suction component (36); The body (31) includes a casing (311) and a nozzle (312) arranged at the bottom end of the casing (311), a connecting frame is arranged on the back of the casing (311), and the casing (311) is connected to the movable frame (2) through the arranged connecting frame, a drainage chamber (3111) is provided in the casing (311), the bottom end of the guide tube (32) is connected to the top end of the drainage chamber (3111) for conveying material consumables, and 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 communicated 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 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 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 sucks the material consumables ejected from the end of the nozzle (312) into the back-suction chamber (314) through the back-suction pipe (313); The regulating assembly (35) comprises a motor (351) and a regulating rod (352) located in the heating chamber (3112); the top end of the regulating rod (352) is threadedly connected to the drive shaft of the motor (351); the bottom end of the regulating rod (352) is provided with a regulating head (353); the regulating 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-suction 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 provided on the second bracket (362); the control panel (365) is located in the flow port (3141); and a first plate opening (3651) is provided on the flow port (3141); The adjusting rod (352) is provided with a balancing body (355) located above the adjusting head (353), and a receiving cavity (3551) is provided at the bottom of the balancing body (355). A balancing membrane (3552) for balancing the pressure in the heating cavity (3112) is provided in the receiving cavity (3551).

2. The industrial mold 3D printer based on plastic powder slurry according to claim 1, characterized in that: The first plate opening (3651) is a diameter-reducing groove that is wider at the top and narrower at the bottom.

3. The industrial mold 3D printer based on plastic powder slurry according to claim 1, characterized in that: The balance membrane (3552) is a pressure balance membrane made of EPTFE material.

4. The industrial mold 3D printer based on plastic powder slurry according to claim 1, 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 regulating rod (352), wherein the size of the baffle (354) is larger than the flow slot of the intra-cavity partition (3113).

5. The industrial mold 3D printer based on plastic powder slurry according to claim 1, 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, which is communicated 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 communicated 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 back-suction assembly (36) further 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, wherein 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 bracket (361), and the end frame (363) is slidably connected to the sliding groove (3641).

6. The industrial mold 3D printer based on plastic powder slurry according to claim 5, characterized in that: An extension plate (316) connected to the housing (311) is provided on the return 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 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); and the second plate opening (3652) matches the size of the circulation port (3141).

7. The industrial mold 3D printer based on plastic powder slurry according to claim 5, 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.

8. 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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