High capacity 3dp printing compounding equipment

Abstract

This invention discloses a high-capacity 3DP printing mixing device, including a frame, a mixing cylinder, a rotary drive device, a material tank, and a catalyst adding device. The mixing cylinder is horizontally arranged and rotatably mounted on the frame. A first discharge port and a first inlet are respectively located at the front and rear ends of the mixing cylinder. The output end of the rotary drive device is driven to the outer circumference of the mixing cylinder, enabling the mixing cylinder to rotate around its central axis. The material tank has a first discharge pipe, and the catalyst adding device has a second discharge pipe. Both the first and second discharge pipes are connected to the inlet. The weight of the mixing cylinder, materials, and catalyst rests on the frame. The rotary drive device does not require a very high power and torque during full-load startup, reducing the performance requirements of the rotary drive device and allowing for the simultaneous mixing of more materials and catalyst. The materials and catalyst inside the mixing cylinder tumble and mix together with the rotation of the mixing cylinder, achieving more uniform mixing without any dead zones.

Description

Technical Field

[0001] This invention belongs to the technical field of 3DP printing equipment, and specifically relates to a large-capacity 3DP printing mixing device. Background Technology

[0002] Currently, printing technologies such as 3DP, SLM, and SLS are relatively mature and widely used in various fields such as architecture, industrial design, automotive, and aerospace. Among them, 3DP printers first lay out the material during the product printing process, and then melt, sinter, or spray specific areas of the material to ultimately complete the rapid prototyping of the product.

[0003] However, before the material preparation work begins, the materials required for printing need to be mixed with the catalyst. Therefore, 3DP printing equipment is equipped with a mixer to mix and stir the materials and catalyst evenly.

[0004] In related technologies, such as the 3D printer mixing tank disclosed in patent application number CN201521083772.2, and the raw material mixing device for manufacturing 3D printing consumables disclosed in patent application number CN201921649136.X, both have a stirring paddle inside the mixing tank. The rotating stirring paddle stirs the materials and catalyst inside the mixing tank. However, due to the gaps between two adjacent stirring paddles and between the stirring paddle and the inner circumferential surface of the mixing tank, dead corners exist, making it difficult to achieve uniform mixing, thus causing a decrease in the printing quality of the 3DP printer.

[0005] In addition, existing mixing machines use vertical mixing tanks, which are driven by a motor to rotate around a central axis extending vertically, causing the materials and catalysts inside the mixing tank to tumble and achieve a uniform mixing effect.

[0006] However, since the weight of the vertical mixing tank rests entirely on the motor, the motor needs to provide sufficient torque to overcome the load and rotate the mixing tank when starting under full load. Therefore, the mixer needs a high-power, high-torque motor, which significantly increases costs. If the motor has low power and low torque, the amount of material and catalyst inside the mixing tank must be reduced to lessen the motor's load. However, this requires multiple mixing operations to provide the necessary material and catalyst for the 3DP printer.

[0007] This shows that existing technology needs further improvement. Summary of the Invention

[0008] To address the aforementioned technical problems, the present invention aims to provide a large-capacity 3DP printing mixing device that not only promotes uniform mixing of materials and catalysts, but also allows for a large throughput per mixing cycle.

[0009] The technical solution adopted to solve the above-mentioned technical problems is as follows:

[0010] This invention discloses a high-capacity 3DP printing mixing device, including a frame, a mixing cylinder, a rotary drive device, a material tank, and a catalyst adding device. The mixing cylinder is horizontally arranged and rotatably mounted on the frame. The front end of the mixing cylinder has a first discharge port, and the rear end of the mixing cylinder has a first inlet port. The output end of the rotary drive device is driven to the outer circumferential surface of the mixing cylinder, so that the mixing cylinder can rotate around its central axis extending forward and backward. The material tank has a first discharge pipe, and the catalyst adding device has a second discharge pipe. Both the first discharge pipe and the second discharge pipe are connected to the first inlet port.

[0011] The present invention has at least the following beneficial effects: Because the mixing cylinder adopts a horizontal design and is rotatably mounted on the frame, the weight of the mixing cylinder and the materials and catalyst inside it rests on the frame. The rotary drive device does not need to provide very high power and torque when starting under full load, thereby reducing the performance requirements of the rotary drive device, reducing manufacturing costs, and enabling the simultaneous mixing of more materials and catalysts. The material tank delivers the material into the mixing cylinder through the first discharge pipe, and the catalyst adding device delivers the catalyst into the mixing cylinder through the second discharge pipe. Since the output end of the rotary drive device is driven and connected to the outer circumferential surface of the mixing cylinder, causing the mixing cylinder to rotate around its extended central axis, the materials and catalyst inside the mixing cylinder tumble and mix together with the rotation of the mixing cylinder, achieving uniform mixing without any dead zones.

[0012] As a further improvement to the above technical solution, the large-capacity 3DP printing mixing equipment also includes a storage tank and a stirring mechanism; the storage tank is located on the front side of the mixing cylinder, the storage tank is hollow to form a storage cavity, the upper end of the storage tank is provided with a second inlet connected to the first outlet, the lower end of the storage tank is provided with a second outlet, the second inlet and the second outlet are connected to the storage cavity, and the stirring mechanism is located in the storage cavity.

[0013] Because the mixing drum can mix a large amount of materials and catalysts simultaneously, once the materials and catalysts are evenly mixed, the mixture can be transferred to a storage tank for temporary storage. This provides the materials needed for printing multiple products with the 3DP printer, eliminating the need to wait for the materials and catalysts to mix completely before each print run, thus reducing the time required for rapid prototyping of multiple products. Furthermore, due to the large mixing capacity of the horizontal mixing drum, this high-capacity 3DP printing mixing equipment does not require frequent start-ups of the mixing process, resulting in a lower probability of natural malfunctions. Moreover, the mixing mechanism is located inside the storage tank, allowing for secondary mixing of the materials in the storage chamber at any time, ensuring that the mixed materials have a certain degree of fluidity and can flow from the storage tank to the 3DP printer.

[0014] As a further improvement to the above technical solution, the stirring mechanism includes a stirring motor, a stirring shaft, and multiple stirring blades. The stirring shaft extends vertically and is coaxially arranged with the storage tank. The stirring shaft is rotatably disposed within the storage cavity. The output shaft of the stirring motor is driven by the stirring shaft. The multiple stirring blades are connected to the outer circumferential surface of the stirring shaft and arranged circumferentially. Since the second inlet is located at the upper end of the storage tank and the second outlet is located at the lower end of the storage tank, the stirring shaft is vertically positioned at the center of the storage cavity. Under the drive of the stirring motor, the multiple stirring blades on the stirring shaft can fully stir the mixed material in the storage cavity, promoting the mixed material to maintain a certain degree of fluidity.

[0015] As a further improvement to the above technical solution, the multiple stirring blades are arranged asymmetrically. Each stirring blade includes an upper plate, a lower plate, and a column. One end of the lower plate is connected to the lower end of the stirring shaft, and the other end of the lower plate extends obliquely upward. The lower end of the upper plate is connected to the other end of the lower plate, and the upper end of the upper plate extends obliquely towards the stirring shaft. The lower end of the column is connected to the lower plate, and the upper end of the column extends obliquely towards the stirring shaft. This design causes the stirring trajectory of each stirring blade to exhibit diversity during the rotation of the stirring shaft, thereby achieving more uniform stirring of the mixed materials in the storage tank.

[0016] As a further improvement to the above technical solution, the stirring mechanism also includes arc-shaped material-distributing blades. Multiple material-distributing blades are provided and located at the upper end of the stirring shaft. These blades are connected to the outer circumferential surface of the stirring shaft and arranged in a circular pattern. When the material-distributing blades rotate with the stirring shaft, they can distribute the mixed material located in the center of the storage chamber to the periphery, preventing excessive accumulation of mixed material in the center of the storage chamber and thus reducing the volume utilization rate of the storage chamber.

[0017] As a further improvement to the above technical solution, the mixing cylinder is a mixer tank, the output shaft of the mixing motor is driven and connected to the lower end of the mixing shaft, the second inlet is arranged facing upwards, the second inlet is located below the first outlet, the second outlet pipe is connected to the first outlet pipe, the first outlet pipe is inclined downwards and inserted into the first inlet, the first outlet pipe is provided with a baffle, the baffle is located on the rear side of the mixing cylinder and covers the first inlet.

[0018] The mixing drum adopts a mixer tank, which not only ensures that the materials and catalysts are mixed evenly to form a mixture, but also prevents the mixed material from flowing out of the first discharge port when the mixing drum rotates clockwise to complete the mixing. When the mixing drum rotates counterclockwise, the mixed material can automatically flow down from the first discharge port to the second inlet of the storage tank. Therefore, the mixing drum can be automatically fed by simply changing the rotation direction of the rotary drive device. The first discharge pipe is inserted at an angle downward into the first inlet, which can quickly deliver the materials and catalyst into the mixing drum. Moreover, the first discharge pipe will not interfere with the rotation of the mixing drum. The baffle on the first discharge pipe can cover the first inlet, preventing the mixed material in the mixing drum from escaping from the first inlet due to the strong stirring action, thus preventing material waste.

[0019] As a further improvement to the above technical solution, the storage tank is equipped with a screen located above the stirring shaft and at the second feed inlet. The screen at the second feed inlet of the storage tank can break up lumpy mixed materials exiting the mixing drum, preventing blockages within the storage tank.

[0020] As a further improvement to the above technical solution, the rotary drive device includes a drive motor and rollers; the rollers are provided in two sets and are located on the left and right sides of the mixing cylinder respectively. The outer circumferential surface of the rollers is in contact with the outer circumferential surface of the mixing cylinder. The output shaft of the drive motor is connected to the rollers to drive them to rotate around their central axis extending forward and backward. With rollers arranged on the left and right sides of the mixing cylinder, and the outer circumferential surface of the rollers in contact with the outer circumferential surface of the mixing cylinder, when the drive motor drives the rollers to rotate, the friction between the rollers and the mixing cylinder causes the rollers to drive the mixing cylinder to rotate, thereby achieving tumbling and uniform mixing of the material and catalyst.

[0021] As a further improvement to the above technical solution, the roller is provided with a drive shaft, the drive shaft is provided with a first sprocket, and the output shaft of the drive motor is provided with a second sprocket. A chain is wound between the first sprocket and the second sprocket. The two sets of rollers and the drive motor are driven by a chain drive, which has high transmission efficiency. Moreover, one drive motor can drive the rotation of two sets of rollers simultaneously, making the structure more compact and saving manufacturing costs.

[0022] As a further improvement to the above technical solution, the high-capacity 3DP printing mixing equipment also includes a thermal reflector and heating elements. The thermal reflector is cylindrical and coaxially arranged with the mixing cylinder. The thermal reflector is fitted onto the mixing cylinder and connected to the frame. Multiple heating elements are provided and located on the inner circumferential surface of the thermal reflector, and the multiple heating elements are arranged in a circular pattern.

[0023] Heating elements are installed on the outer periphery of the mixing cylinder. These elements heat the mixing cylinder, promoting more uniform and faster mixing of the materials and catalyst inside, resulting in better catalytic effects and shortening the rotation time of the mixing cylinder, thus achieving energy savings. The circumferential arrangement of the heating elements ensures uniform heating of the mixing cylinder. Furthermore, the heat reflector ensures that the heat generated by the heating elements is transferred to the mixing cylinder, avoiding significant heat loss and poor energy-saving performance. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0025] Figure 1 This is a left view of the high-capacity 3DP printing mixing device provided in an embodiment of the present invention;

[0026] Figure 2 This is a top view of the high-capacity 3DP printing mixing device provided in the embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the structure of the material tank provided in an embodiment of the present invention;

[0028] Figure 4 This is a rear view of the rotary drive device and the mixing cylinder drive connection provided in the embodiment of the present invention;

[0029] Figure 5 This is a left view of the rotary drive device and the mixing cylinder drive connection provided in the embodiment of the present invention;

[0030] Figure 6 This is a rear view of the high-capacity 3DP printing mixing device provided in an embodiment of the present invention;

[0031] Figure 7 This is a front view of the high-capacity 3DP printing mixing device provided in an embodiment of the present invention;

[0032] Figure 8 This is a top view of the storage tank provided in an embodiment of the present invention;

[0033] Figure 9 This is a schematic diagram of the internal structure of the storage tank provided in an embodiment of the present invention;

[0034] Figure 10 This is a schematic diagram of the structure of the stirring blade and the feeding blade provided in the embodiment of the present invention;

[0035] Figure 11 This is a schematic diagram of the storage tank provided in this embodiment of the invention when there is a lack of stirring blades;

[0036] Figure 12This is a schematic diagram of the storage bin provided in this embodiment of the invention when it has material feeding blades.

[0037] The following labels are used in the attached diagram: 100, frame; 200, material tank; 210, tank body; 220, discharge valve; 230, first discharge pipe; 240, first pneumatic hammer; 250, weighing sensor; 260, filter element; 271, material pipe; 272, vacuum pipe; 273, backflush pipe; 281, first pressure sensor; 282, second pressure sensor; 290, baffle; 310, catalyst tank; 320, injection pump; 400, mixing cylinder; 410, first discharge port; 500, rotary drive device; 510, drive motor; 520, chain; 530, roller;

[0038] 600. Storage hopper; 610. Discharge pipe; 620. Screen; 630. Feeding blade; 640. Stirring blade; 641. First upper plate; 642. First lower plate; 643. First column; 644. First stirring plate; 645. Second upper plate; 646. Second lower plate; 647. Second column; 648. Second stirring plate; 650. Stirring shaft; 651. Cone; 660. Second pneumatic hammer; 670. Stirring motor; 710. Heat reflector; 720. Heating element; 730. Supporting element; 800. Mixed material. Detailed Implementation

[0039] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0040] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0041] In the description of this invention, the use of terms such as "a number" means one or more, with "more than" meaning two or more. Terms like "greater than," "less than," and "exceeding" are understood to exclude the stated number, while terms like "above," "below," and "within" are understood to include the stated number. The use of terms like "first," "second," and "third" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, the number of indicated technical features, or the sequential relationship between indicated technical features.

[0042] It should be noted that in the attached diagram, the X direction points from the rear to the front of the large-capacity 3DP printing mixing equipment; the Y direction points from the left to the right of the large-capacity 3DP printing mixing equipment; and the Z direction points from the bottom to the top of the large-capacity 3DP printing mixing equipment.

[0043] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0044] Reference Figures 1 to 12 The following are several embodiments of the high-capacity 3DP printing mixing equipment of the present invention.

[0045] like Figures 1 to 12 As shown, Embodiment 1 of the present invention provides a large-capacity 3DP printing mixing device. The structure of the large-capacity 3DP printing mixing device includes a frame 100, a mixing cylinder 400, a rotary drive device 500, a material tank 200, and a catalyst adding device. It can mix the materials and catalyst evenly and provide the 3DP printer with the mixed material 800 required for product printing. Moreover, the capacity of the mixed material 800 mixed each time is large.

[0046] Among them, such as Figure 1 , Figure 2 , Figures 4 to 7 As shown, the mixing cylinder 400 is horizontally arranged, with its central axis extending in the front-to-back direction. Moreover, the mixing cylinder 400 is rotatably mounted on the frame 100, meaning that the mixing cylinder 400 can rotate relative to the frame 100 around its own central axis.

[0047] Furthermore, the output end of the rotary drive device 500 is rotatable and is drivenly connected to the outer peripheral surface of the mixing cylinder 400. It can be understood that when the rotary drive device 500 is running, the output end of the rotary drive device 500 can drive the mixing cylinder 400 to rotate around its own central axis extending back and forth.

[0048] Specifically, the frame 100 may be equipped with support rollers, which may be made of metal materials such as stainless steel, and are not limited thereto. There are two sets of support rollers, one set located on the left side of the mixing cylinder 400 and the other set located on the right side of the mixing cylinder 400. The support rollers are mounted on the frame 100 via bearing seats. The two ends of the support rollers extend in the front-rear direction, so that the outer circumferential surface of the support rollers can abut against the outer circumferential surface of the mixing cylinder 400. Therefore, the mixing cylinder 400 is supported by the support rollers, and the rolling friction between the mixing cylinder 400 and the support rollers is small, allowing the mixing cylinder 400 to rotate easily.

[0049] In some embodiments, the rotary drive device 500 includes a motor, a drive gear, and a driven gear. The output shaft of the motor is connected to the drive gear. The driven gear has a hollow interior forming a mounting hole. The driven gear is fitted onto the outer circumferential surface of the mixing cylinder 400 through the mounting hole, causing the driven gear to be fixed to the mixing cylinder 400. The drive gear and the driven gear are meshed and connected. When the motor drives the drive gear to rotate, the driven gear can drive the mixing cylinder to rotate around the central axis 400 that extends back and forth.

[0050] In this embodiment, as Figure 4 , Figure 5 and Figure 7 As shown, the rotary drive device 500 includes a drive motor 510 and a roller 530.

[0051] There are two sets of rollers 530, one set located on the left side of the mixing cylinder 400 and the other set located on the right side of the mixing cylinder 400. It is understood that each set of rollers 530 may contain one or more rollers 530, and this is not limited. If each set of rollers 530 includes two or more rollers 530, they can be connected by a connecting shaft.

[0052] The outer circumferential surface of roller 530 contacts the outer circumferential surface of mixing cylinder 400. It is understood that mixing cylinder 400 is made of metal, and the outer circumferential surface of roller 530 is provided with a layer of rubber to increase the friction between mixing cylinder 400 and roller 530. To prevent mixing cylinder 400 from moving in the front-to-back direction, an annular limiting groove can be provided on the outer circumferential surface of mixing cylinder 400, causing the outer circumferential surface of roller 530 to contact the bottom surface of the limiting groove. Because roller 530 provides a certain degree of obstruction to the front and rear walls of the limiting groove, mixing cylinder 400 can only rotate stably around its own central axis.

[0053] The output shaft of the drive motor 510 can be connected to the roller 530 via a gear transmission structure, chain transmission structure, etc., causing the roller 530 to rotate around its central axis extending forward and backward under the drive of the drive motor 510. The drive motor 510 is mounted on the frame 100 by bolts.

[0054] Specifically, each set of rollers 530 includes two rollers 530, with a drive shaft between them, enabling one drive shaft to drive both rollers 530 to rotate simultaneously. The drive shaft is mounted on the frame 100 via bearing seats. The drive shaft is equipped with a first sprocket, and the output shaft of the drive motor 510 is equipped with a second sprocket. A chain 520 is positioned between the first and second sprockets, and the chain 520, wound between the first and second sprockets, transmits power from the drive motor 510 to the drive shaft, thereby enabling the rollers 530 to rotate the mixing cylinder 400 through friction with it.

[0055] If the first and second sprockets are single-row sprockets, one drive motor 510 corresponds to two drive shafts; therefore, the output shaft of the drive motor 510 is equipped with two second sprockets. If the first and second sprockets are double-row sprockets, the output shaft of the drive motor 510 can be equipped with one second sprocket. Therefore, the type of the first and second sprockets is not limited here.

[0056] This design allows one drive motor 510 to drive two sets of rollers 530 to rotate simultaneously, saving manufacturing costs.

[0057] It is understood that the number of the first sprocket, the second sprocket, and the chain 520 is not limited; that is, one or more chains 520 can be installed between the drive motor 510 and each drive shaft. A speed reducer can be installed between the output shaft of the drive motor 510 and the second sprocket. Since the roller 530 also supports the mixing cylinder 400, the support roller can be installed or not. The roller 530 can be made of metal to provide sufficient strength to support the mixing cylinder 400.

[0058] The rotary drive device 500 and the mixing cylinder 400 are connected by the aforementioned drive method, which enables the transmission of the outer peripheral edge of the mixing cylinder 400. The roller 530 can provide support for the mixing cylinder 400, which greatly reduces the torque required by the drive motor 510. Therefore, significant energy-saving effect can be achieved.

[0059] The mixing cylinder 400 is hollow, forming a mixing chamber that provides space for stirring and mixing the materials and catalyst. The mixing cylinder 400 is provided with a first discharge port 410 and a first inlet port, wherein the first discharge port 410 is located at the front end of the mixing cylinder 400, and the first inlet port is located at the rear end of the mixing cylinder 400. Both the first inlet port and the first discharge port 410 are connected to the mixing chamber.

[0060] like Figures 1 to 3 As shown, the material tank 200 includes a tank body 210, a material pipe 271, a vacuum pipe 272, a first discharge pipe 230, and a weighing sensor 250.

[0061] The canister 210 is funnel-shaped, with a hollow interior forming a material chamber. The upper end of the material chamber has a material inlet and an air outlet, while the lower end has an outlet. A material pipe 271 is connected to the material inlet, allowing the material required for printing to enter the material chamber. One end of a vacuum pipe 272 is connected to the air outlet, and the other end is connected to vacuum equipment such as a vacuum pump or negative pressure fan. The vacuum pipe 272 continuously evacuates the material chamber, ensuring smooth entry of the material.

[0062] It is understandable that the materials required for printing are not limited to the sand used for printing. The following explanation uses sand for printing as an example. The material flowing out through material pipe 271 can be new sand, old sand, or a mixture of new and old sand, and is not limited here.

[0063] One end of the first discharge pipe 230 is connected to the outlet, and the other end of the first discharge pipe 230 is connected to the first feed port of the mixing cylinder 400, so that the material can leave the material chamber through the first discharge pipe 230 and enter the mixing chamber of the mixing cylinder 400.

[0064] Multiple load cells 250 are mounted on the frame 100 and connected to the tank 210, supporting the tank 210 and keeping it stationary. The load cells 250 acquire the real-time weight of the tank 210 and send it to the controller. When the weight of the material in the material chamber reaches a set value, the material can be transferred to the mixing cylinder 400. Therefore, the material tank 200 has a material weighing function.

[0065] Understandably, a discharge valve 220 is installed on the first discharge pipe 230, and the discharge valve 220 can be an electrically controlled valve. The discharge valve 220 controls the opening and closing of the connection between the tank 210 and the mixing cylinder 400. The discharge valve 220 is closed when the tank 210 is being fed and weighed. When the weighing is complete and the material needs to be sent into the mixing cylinder 400, the discharge valve 220 is opened.

[0066] To ensure that all material in tank 210 is delivered to mixing cylinder 400, a first pneumatic hammer 240 is installed on the outer peripheral wall of tank 210. Activating the first pneumatic hammer 240 uses vibration to dislodge any remaining material in tank 210, allowing it to flow into mixing cylinder 400 through the first discharge pipe 230. It is understood that there can be one or more first pneumatic hammers 240.

[0067] To prevent some material from being removed during vacuuming, the material chamber of the tank 210 is equipped with a filter element 260. The outer circumferential surface of the filter element 260 has multiple air holes to allow air from the material chamber to enter. The upper end of the filter element 260 is connected to the air outlet. It is understood that the tank 210 is equipped with a partition plate located above the material chamber. The upper surface of the partition plate and the upper part of the tank 210 form a vacuum chamber. A material inlet can be provided with an inlet pipe that extends downwards into the material chamber to guide the material into it. The upper end of the filter element 260 is connected to the vacuum chamber, which is connected to the air outlet.

[0068] When the vacuum tube 272 evacuates the material chamber, the air in the material chamber flows through the filter element 260 to the vacuum tube 272, while the material remains in the material chamber due to the obstruction of the filter element 260. When the material chamber reaches a certain vacuum level, the material will enter the material chamber along the material tube 271.

[0069] To prevent filter element 260 from clogging and malfunctioning, material tank 200 has a backflush function. A backflush pipe 273 is installed, connected to the air outlet of tank body 210. The backflush pipe 273 provides backflush air to backflush filter element 260, blowing material blocked in the air holes of filter element 260 into the material chamber. It is understood that the vacuum pipe 272 and backflush pipe 273 will be equipped with control valves. Backflush pipe 273 can be connected to an air storage tank, allowing the air storage tank to provide backflush air.

[0070] In addition, the material tank 200 is equipped with a first pressure sensor 281 and a second pressure sensor 282. The first pressure sensor 281 is used to detect the air pressure in the vacuum chamber, and the second pressure sensor 282 is used to detect the air pressure in the material chamber. That is, the first pressure sensor 281 and the second pressure sensor 282 respectively detect the air pressure on the inner and outer sides of the filter element 260 to identify whether the filter element 260 is clogged. The first pressure sensor 281 and the second pressure sensor 282 can send the collected air pressure data to the controller. When the filter element 260 is clogged to the point that the air pressure difference between the vacuum chamber and the material chamber reaches a set value, the feeding of material into the material chamber is stopped, and backflushing is performed.

[0071] like Figure 1 , Figure 2 and Figure 6 As shown, the catalyst addition device includes a catalyst tank 310 and a dosing pump 320. The catalyst tank 310 stores a large amount of catalyst. The outlet of the catalyst tank 310 is connected to the inlet of the dosing pump 320 through a pipe. The outlet of the dosing pump 320 is provided with a second discharge pipe, which is connected to the first feed port to deliver the catalyst into the mixing cylinder 400.

[0072] Understandably, the second discharge pipe can be connected to the first discharge pipe 230, which in turn is connected to the first inlet. The catalyst tank 310 and the injection pump 320 can be fixed on the frame 100. The number of catalyst addition devices can be one or more, and is not limited here. If multiple catalyst addition devices are provided, various catalysts can be added into the mixing cylinder 400 to promote mixing of the material and the catalyst.

[0073] In the high-capacity 3DP printing mixing equipment provided in this embodiment of the invention, since the mixing cylinder 400 adopts a horizontal design and is rotatably mounted on the frame 100, the weight of the mixing cylinder 400 and the materials and catalyst inside it falls on the frame 100. This reduces the load on the rotary drive device 500, allowing it to operate at full load without requiring excessive power and torque. Consequently, the power and torque performance requirements of the rotary drive device 500 are reduced, lowering the manufacturing cost of the high-capacity 3DP printing mixing equipment. Furthermore, this design allows for a larger mixing cylinder 400, enabling it to hold more materials and catalysts and to mix more materials and catalysts simultaneously.

[0074] The material tank 200 delivers the material to the mixing cylinder 400 through the first discharge pipe 230, and the catalyst adding device delivers the catalyst to the mixing cylinder 400 through the second discharge pipe. Since the output end of the rotary drive device 500 is connected to the outer circumferential surface of the mixing cylinder 400, the mixing cylinder 400 rotates around the central axis extending back and forth. Therefore, the material and catalyst in the mixing cylinder 400 tumble violently up and down as the mixing cylinder 400 rotates, which promotes the mixing of the material and catalyst without any dead corners, thereby achieving the purpose of uniform mixing.

[0075] Furthermore, such as Figures 4 to 7 As shown, the high-capacity 3DP printing mixing equipment also includes a thermal reflector 710 and a heating element 720.

[0076] The heat reflector 710 is cylindrical in shape, and it can be understood that the front and rear ends of the heat reflector 710 are open structures. The heat reflector 710 is coaxially arranged with the mixing cylinder 400, and the heat reflector 710 is sleeved on the mixing cylinder 400, that is, the outer circumferential surface of the mixing cylinder 400 and the inner circumferential surface of the heat reflector 710 are opposite to each other.

[0077] The heat reflector 710 is mounted on the frame 100. Specifically, the frame 100 is provided with support members 730, one or more of which can be bolted to the heat reflector 710, thus fixing the heat reflector 710 relative to the frame 100. The heat reflector 710 can be a cylindrical cover made of metal, with a heat-reflective film on its inner circumferential surface. Alternatively, it can be coated with heat-reflective paint. The support members 730 can also be made of metal and are located below the heat reflector 710. The shape of the support members 730 is not limited, as long as they provide good support and fixation for the heat reflector 710.

[0078] There are multiple heating elements 720, which can be fixedly mounted on the inner circumferential surface of the heat reflector 710 by a bracket. Moreover, the multiple heating elements 720 are arranged in a circle with the central axis of the heat reflector 710 as the center. The heating elements 720 can be heating rods, infrared carbon fiber heating tubes, PTC heating elements, or other heat-generating components, and there are no restrictions on them.

[0079] In this embodiment, the middle part of the mixing cylinder 400 is cylindrical, the front and rear ends of the mixing cylinder 400 are frustoconical, the front end face of the mixing cylinder 400 is an open structure, designated as the first discharge port 410, and the rear end face of the mixing cylinder 400 is an open structure, designated as the first feed port. The heat reflector 710 is arranged around the middle part of the mixing cylinder 400.

[0080] During the rotation of the mixing cylinder 400, the heating element 720 is activated. The heat generated by the heating element 720 can be transferred to the wall of the mixing cylinder 400, thereby heating the material and catalyst inside the mixing cylinder 400. This promotes more uniform and faster mixing of the material and catalyst, thus shortening the rotation time of the mixing cylinder 400 and achieving energy saving. It also avoids uneven mixing of material and catalyst in low-temperature environments. Furthermore, the heat reflector 710 can reflect the heat generated by the heating element 720 back to the mixing cylinder 400, avoiding significant heat loss and poor energy saving.

[0081] Furthermore, such as Figure 1 , Figure 2 , Figures 7 to 12 As shown, the large-capacity 3DP printing mixing equipment also includes a storage tank 600 and a stirring mechanism.

[0082] The storage hopper 600 is located in front of the mixing cylinder 400. The storage hopper 600 is hollow, forming a storage cavity that can hold the mixed material 800. The storage hopper 600 is provided with a second inlet and a second outlet, both of which are connected to the storage cavity.

[0083] Specifically, the second inlet is located at the top of the storage tank 600 and is connected to the first outlet 410 of the mixing cylinder 400, so that the mixed material 800 in the mixing cylinder 400 can be introduced into the storage tank 600 for temporary storage.

[0084] Since the mixing cylinder 400 can mix a large amount of materials and catalysts at the same time, after the mixing cylinder 400 has mixed the materials and catalysts evenly, the mixed material 800 can be transferred to the storage tank 600 for temporary storage, providing the materials required for printing multiple products for the 3DP printer. It is not necessary to wait for the materials and catalysts to be mixed before each product is printed, thereby reducing the time required for rapid prototyping of multiple products.

[0085] The second discharge port is located at the lower end of the storage tank 600. Specifically, the storage tank 600 is provided with a discharge pipe 610, one end of which is connected to the second discharge port. This pipe can transport the mixed material 800 in the storage chamber to the 3DP printer to complete the powder spreading work before printing the product. In this embodiment, the second discharge port is located on the outer peripheral wall of the lower part of the storage tank 600, such as... Figure 7 As shown. Understandably, the discharge pipe 610 is equipped with a control valve.

[0086] The stirring mechanism is located inside the storage chamber and can stir the mixed material 800 inside the storage chamber to ensure that the mixed material 800 always maintains a certain degree of fluidity.

[0087] Specifically, the structure of the stirring mechanism includes a stirring motor 670, a stirring shaft 650, and stirring blades 640.

[0088] The stirring shaft 650 extends vertically at both ends and is coaxially arranged with the storage tank 600, meaning the stirring shaft 650 is located in the middle of the storage cavity of the storage tank 600. The storage cavity can be funnel-shaped, and the stirring shaft 650 can be a round rod. The stirring shaft 650 is mounted on the storage tank 600 via bearings, and is located inside the storage cavity. The stirring shaft 650 can rotate relative to the storage tank 600 around its vertically extending axis.

[0089] The output shaft of the stirring motor 670 is driven to drive the stirring shaft 650. Specifically, the output shaft of the stirring motor 670 can drive the stirring shaft 650 to rotate through a gear transmission structure. There are multiple stirring blades 640. The multiple stirring blades 640 can be connected and fixed to the outer circumference of the stirring shaft 650 by welding, bolting, or other methods. Moreover, the multiple stirring blades 640 are arranged around the circumference of the stirring shaft 650.

[0090] The storage tank 600 is equipped with a stirring mechanism, which can stir the mixed material 800 in the storage chamber at any time to ensure that the mixed material 800 has a certain fluidity and can flow from the storage tank 600 to the 3DP printer.

[0091] In this embodiment, the mixing cylinder 400 is a mixer tank. It is understood that mixer tanks are existing technology, and those skilled in the art should understand their internal structure and principles; therefore, they will not be described in detail here. When the mixer tank rotates in one direction, it can stir the materials and catalyst inside. When the mixer tank rotates in the opposite direction, the materials and catalyst inside will flow out from the first discharge port 410.

[0092] The output shaft of the stirring motor 670 can be driven to the lower end of the stirring shaft 650 via a reducer, so that the stirring shaft 650 can rotate around the vertically extending axis of rotation under the driving action of the stirring motor 670.

[0093] In addition, a second pneumatic hammer 660 is provided on the outer peripheral surface of the storage tank 600, and the number of the second pneumatic hammers 660 is unlimited. When the second pneumatic hammers 660 are activated, the vibration effect increases the fluidity of the mixed material 800 in the storage tank 600, so that the mixed material 800 can flow down from the wall of the storage cavity to the second discharge port of the storage tank 600.

[0094] The second inlet of the storage tank 600 faces upwards and is located below the first outlet 410. The first outlet 410 of the mixing cylinder 400 faces forward. When the mixing cylinder 400 rotates to discharge material, the mixture 800, formed by mixing the material and the catalyst, flows downwards into the storage tank 600. Therefore, there is no need to install a pipe between the storage tank 600 and the mixing cylinder 400 to complete the discharge of the mixture 800, simplifying the overall structure. The storage tank 600 does not interfere with the rotation of the mixing cylinder 400.

[0095] In the high-capacity 3DP printing mixing equipment provided in this embodiment, since the mixing cylinder 400 adopts a mixer tank, the internal structural characteristics of the mixer tank can be utilized to promote the uniform mixing of materials and catalysts to form a mixed material 800.

[0096] Furthermore, when the mixing cylinder 400 rotates clockwise, it can fully stir the materials and catalyst in the mixing chamber, preventing the mixed material 800 from flowing out of the first discharge port 410 of the mixing cylinder 400. When the mixing cylinder 400 rotates counterclockwise, the mixed material 800 can automatically flow out of the first discharge port 410 of the mixing cylinder 400 and flow down to the second inlet of the storage tank 600. Therefore, in the operation of the large-capacity 3DP printing mixing equipment, the mixing cylinder 400 can be automatically unloaded simply by changing the driving rotation direction of the rotary drive device 500, which is very convenient and fast.

[0097] In addition, such as Figure 1 , Figures 4 to 6 As shown, in this embodiment, the second discharge pipe is directly connected to the first discharge pipe 230, causing the material and catalyst to flow together into the mixing cylinder 400. Furthermore, the first discharge pipe 230 is inclined downwards from back to front and inserted into the first inlet of the mixing cylinder 400, allowing the material in the tank 200 to flow smoothly into the mixing cylinder 400 due to its own gravity. It is understood that because the first inlet of the mixing cylinder 400 is designed to be large enough, the first discharge pipe 230 does not come into contact with the mixing cylinder 400. Therefore, even if the first discharge pipe 230 is inserted into the first inlet, it will not interfere with the rotation of the mixing cylinder 400.

[0098] Furthermore, to prevent the material and catalyst inside the mixing cylinder 400 from escaping from the first inlet during the mixing process, the first outlet pipe 230 is equipped with a baffle 290. The baffle 290 is connected and fixed to the first outlet pipe 230. The baffle 290 is located on the rear side of the mixing cylinder 400 and can cover the first inlet of the mixing cylinder 400, that is, the size of the baffle 290 is larger than the first inlet. The baffle 290 can be a circular plate.

[0099] Understandably, there can be some gap between the baffle 290 and the rear end face of the mixing cylinder 400, such as a gap of 3mm to 10mm, to prevent the baffle 290 from rubbing against the rotating mixing cylinder 400, and to block the material and catalyst from flying out of the first feed port.

[0100] This design not only ensures that materials and catalysts are smoothly added to the mixing cylinder 400, but also prevents interference from the catalyst adding device and the material tank 200 during the rotation of the mixing cylinder 400. It also avoids the problem of materials and catalysts escaping during mixing and causing waste. Compared to manually extending or retracting the first discharge pipe 230 into or out of the mixing cylinder 400, this design is more convenient, faster, and saves manpower.

[0101] Furthermore, such as Figures 8 to 10 As shown, the stirring mechanism also includes a feeding blade 630.

[0102] From a top view, the feeding blades 630 are arc-shaped. The cross-sectional shape of the feeding blades 630 can be square or trapezoidal. There are multiple feeding blades 630, and they are located at the upper end of the stirring shaft 650. The multiple feeding blades 630 can be connected and fixed to the outer circumference of the stirring shaft 650 by welding or bolting. The multiple feeding blades 630 are arranged in a circle with the central axis of the stirring shaft 650 as the center.

[0103] It is understood that this embodiment only shows two feeding blades 630, but the number of feeding blades 630 can be three, four, or more. The feeding blades 630 are fixed to the stirring shaft 650 by a connecting plate. Figure 8 As shown, the feeding blade 630 rotates clockwise with the stirring shaft 650.

[0104] like Figure 11 As shown, since the mixed material 800 flows directly down from the first outlet 410 of the mixing cylinder 400 into the storage tank 600, in order to better collect the mixed material 800, the mixed material 800 will fall to the middle position of the storage tank 600. Therefore, the mixed material 800 in the storage cavity of the storage tank 600 presents a situation where the middle is high and the outer periphery is low. This will result in a low volume utilization rate of the storage cavity of the storage tank 600, causing the storage tank 600 to be unable to completely collect the mixed material 800 flowing out of the mixing cylinder 400, resulting in a larger volume of the storage tank 600. This leads to the problem of the storage tank 600 occupying a large space and producing a large amount of material.

[0105] like Figures 8 to 10 , Figure 12 As shown, due to the presence of the feeding blade 630, when the feeding blade 630 rotates clockwise, the mixed material 800 located in the middle of the storage cavity will move along the outer arc surface of the feeding blade 630, causing the feeding blade 630 to push the mixed material 800 to the periphery of the storage cavity, making the mixed material 800 in the storage cavity more even, and enabling the storage bin 600 to collect more mixed material 800, thereby improving the volume utilization rate of the storage bin 600.

[0106] In addition, a cone 651 can be provided at the upper end of the stirring shaft 650 to prevent a small amount of mixed material 800 from remaining on the upper surface of the stirring shaft 650.

[0107] Furthermore, the storage tank 600 is equipped with a screen 620, which is located above the stirring shaft 650 and at the second inlet of the storage tank 600. It is understood that the screen 620 can break up the lumpy mixed material 800 exiting the mixing cylinder 400, preventing blockages from easily occurring inside the storage tank 600.

[0108] In some embodiments, such as Figures 9 to 12 As shown, the stirring blades 640 adopt a special structural design. Multiple stirring blades 640 are arranged asymmetrically, meaning that each stirring blade 640 has a different shape, but the composition of the stirring blades 640 is the same.

[0109] Specifically, each stirring blade 640 includes an upper plate, a lower plate, and a column. One end of the lower plate is connected and fixed to the lower end of the stirring shaft 650 by welding or other means. The other end of the lower plate extends upward at an angle. The lower end of the upper plate is connected and fixed to the other end of the lower plate, and the upper end of the upper plate extends inclined towards the stirring shaft 650, meaning the upper end of the upper plate is closer to the stirring shaft 650 than the lower end. The lower end of the column is connected and fixed to the inner side of the lower plate, and the upper end of the column extends inclined towards the stirring shaft 650, meaning the upper end of the column is closer to the stirring shaft 650 than the lower end. The number of columns can be one or more, and is not limited here.

[0110] like Figure 8 and Figure 9 As shown, the stirring blade 640 rotates in the same direction as the feeding blade 630, both clockwise. Both the lower and upper plates are rectangular.

[0111] In some embodiments, the inner surfaces of the lower plate and the upper plate are defined as guide surfaces, which are directly opposite the outer peripheral surface of the stirring shaft 650, that is, the central axis of the column on the lower plate intersects the central axis of the stirring shaft 650.

[0112] In this embodiment, the guide surface is inclined and not directly opposite the outer periphery of the stirring shaft 650. That is, the column on the lower plate is also inclined, and the central axis of the column is offset from the central axis of the stirring shaft 650 and does not intersect. Since the mixed material 800 near the stirring shaft 650 has better flowability and the mixed material 800 near the storage chamber wall has poorer flowability, during the clockwise rotation of the stirring blade 640, the mixed material 800 flows along the guide surface and moves closer to the stirring shaft 650. This facilitates the mixing of the outer and middle mixed materials 800, enhances the flowability of the mixed material 800, and prevents the mixed material 800 near the storage chamber wall from becoming less fluid and easily clumping. This ensures that all the mixed material 800 in the storage tank 600 can be delivered to the 3DP printer for powder spreading, preventing a large amount of material waste.

[0113] Furthermore, the lower plate tilts upwards towards the direction away from the stirring shaft 650, while the upper plate tilts upwards towards the direction closer to the stirring shaft 650. The upper and lower plates can work together, and when the lower and upper plates rotate simultaneously, the mixed material 800 in the lower layer can move upwards along the inner and outer sides of the lower plate, while the mixed material 800 in the upper layer can move downwards along the inner and outer sides of the upper plate. This allows the stirring blades 640 to stir the mixed material 800 in both layers, achieving thorough mixing and further improving the fluidity of the mixed material 800.

[0114] The column is located on the inner side of the lower plate and can stir the mixed material 800 located on the inner side of the lower plate. During the rotation of the column, the mixed material 800 can move along the extension direction of the column and collide and mix with the mixed material 800 at the guide surface, further enhancing the stirring effect and improving the uniformity of the mixed material 800.

[0115] This design causes the mixing trajectory of each mixing blade 640 to be diverse during the rotation of the mixing shaft 650, thereby making the mixed material 800 in the storage tank 600 more uniform and thorough.

[0116] In this embodiment, there are two stirring blades 640, namely a first stirring blade and a second stirring blade. The first stirring blade and the second stirring blade are located on opposite sides of the stirring shaft 650.

[0117] The first stirring blade includes a first upper plate 641, a first lower plate 642, and a first column 643. The first lower plate 642 forms an acute angle with the central axis of the stirring shaft 650, which can be 30°, 40°, 45°, etc. The connection between the first upper plate 641 and the first lower plate 642 can be formed by bending a single plate. The included angle between the first upper plate 641 and the first lower plate 642 is greater than or equal to 90°. The first column 643 can be connected to the first lower plate 642 by welding or a threaded structure. The first column 643 is perpendicular to the inner surface of the first lower plate 642. It can be understood that the inner surface of the first lower plate 642 refers to the surface of the first lower plate 642 facing the stirring shaft 650.

[0118] The second stirring blade includes a second upper plate 645, a second lower plate 646, and a second column 647. The second lower plate 646 forms a certain angle with the central axis of the stirring shaft 650, which can be 50°, 60°, 75°, etc. It is understood that the angle between the second lower plate 646 and the stirring shaft 650 is not the same as the angle between the first lower plate 642 and the stirring shaft 650. The second upper plate 645 and the second lower plate 646 are also formed from plates through a bending process. The angle between the second upper plate 645 and the second lower plate 646 is not the same as the angle between the first upper plate 641 and the first lower plate 642. Similarly, the second column 647 can be fixed to the second lower plate 646 by welding or a threaded structure. The second column 647 is vertically disposed on the inner side of the second lower plate 646.

[0119] The lengths of the multiple first pillars 643 are inconsistent, and the lengths of the multiple second pillars 647 are not the same.

[0120] In this embodiment, the angle between the second lower plate 646 and the stirring shaft 650 is larger than the angle between the first lower plate 642 and the stirring shaft 650. For example... Figure 9 As shown, the second lower plate 646 can be parallel to the inclined inner wall surface of the storage cavity.

[0121] Since the angle between the second lower plate 646 and the stirring shaft 650 is larger than the angle between the first lower plate 642 and the stirring shaft 650, the angle between the first upper plate 641 and the first lower plate 642 is greater than the angle between the second upper plate 645 and the second lower plate 646.

[0122] This design allows the first upper plate 641 and the second upper plate 645 to guide the mixed material 800 above to the periphery of the storage chamber, preventing the first lower plate 642 and the second lower plate 646 from breaking due to the weight of the mixed material 800 above. Since the second lower plate 646 is more inclined relative to the central axis of the stirring shaft 650 than the first lower plate 642, it is prone to bending and breakage. Therefore, the second upper plate 645 is more inclined relative to the central axis of the stirring shaft 650 than the first upper plate 641, greatly reducing the load on the second lower plate 646 and ensuring that each stirring blade 640 can operate normally for a long time.

[0123] It is understandable that the dimensions between the first lower plate 642 and the second lower plate 646 may be the same or different. Similarly, the dimensions between the first upper plate 641 and the second upper plate 645, and between the first column 643 and the second column 647, may be the same or different. The number of first columns 643 and second columns 647 may be the same or different.

[0124] Furthermore, the first stirring blade also includes a first stirring plate 644, and the second stirring blade also includes a second stirring plate 648. The upper end of the first stirring plate 644 is connected to the lower end of the first lower plate 642, and the lower end of the first stirring plate 644 extends downward. The upper end of the second stirring plate 648 is connected to the lower end of the second lower plate 646, and the lower end of the second stirring plate 648 extends downward. Moreover, the distance between the second stirring plate 648 and the central axis of the stirring shaft 650 is greater than the distance between the first stirring plate 644 and the central axis of the stirring shaft 650.

[0125] In this embodiment, since the lower end of the storage tank 600 is cylindrical, and the second discharge port is located on the outer circumferential surface of the lower end of the storage tank 600, in order to avoid clumping and blockage at the second discharge port, a first stirring plate 644 and a second stirring plate 648 are provided to stir the mixed material 800 located at the lower end of the storage tank 600, so that the mixed material 800 maintains good fluidity.

[0126] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A high-capacity 3DP printing mixing device, comprising a frame, a mixing cylinder, a rotary drive device, a material tank, and a catalyst adding device, characterized in that, The mixing cylinder is horizontally arranged and rotatably mounted on the frame. The front end of the mixing cylinder is provided with a first discharge port, and the rear end of the mixing cylinder is provided with a first feed port. The output end of the rotary drive device is driven to the outer circumferential surface of the mixing cylinder, so that the mixing cylinder can rotate around its central axis extending forward and backward. The material tank is provided with a first discharge pipe, and the catalyst adding device is provided with a second discharge pipe. Both the first discharge pipe and the second discharge pipe are connected to the first feed port. The large-capacity 3DP printing mixing equipment also includes a storage tank and a stirring mechanism; the storage tank is located in front of the mixing cylinder, the storage tank is hollow to form a storage cavity, the upper end of the storage tank is provided with a second inlet connected to the first outlet, the lower end of the storage tank is provided with a second outlet, the second inlet and the second outlet are connected to the storage cavity, and the stirring mechanism is located in the storage cavity; The stirring mechanism includes a stirring motor, a stirring shaft, and multiple stirring blades; the stirring shaft extends vertically and is coaxially arranged with the storage tank, the stirring shaft is rotatably disposed in the storage cavity, the output shaft of the stirring motor is drivenly connected to the stirring shaft, and the multiple stirring blades are connected to the outer circumferential surface of the stirring shaft; The multiple stirring blades are arranged asymmetrically. Each stirring blade includes an upper plate, a lower plate, and a column. One end of the lower plate is connected to the lower end of the stirring shaft, and the other end of the lower plate extends obliquely upward. The lower end of the upper plate is connected to the other end of the lower plate, and the upper end of the upper plate extends obliquely toward the stirring shaft. The lower end of the column is connected to the lower plate, and the upper end of the column extends obliquely toward the stirring shaft. The column is disposed on the inner side of the lower plate to stir the mixed material located inside the lower plate. The inner surfaces of the lower plate and the upper plate are defined as guide surfaces. The guide surfaces are inclined rather than directly facing the outer circumference of the stirring shaft. The column is inclined so that the central axis of the column is offset from and does not intersect with the central axis of the stirring shaft. During the rotation of the stirring shaft, the mixed material can flow along the guide surfaces and approach the stirring shaft, which is beneficial for the mixing of the outer and middle mixed materials. At the same time, the mixed material can move along the extension direction of the column and collide with the mixed material at the guide surfaces, causing the stirring trajectory of each stirring blade to be diverse during the rotation of the stirring shaft, so as to more evenly and fully stir the mixed material in the storage tank.

2. The large-capacity 3DP printing mixing equipment according to claim 1, characterized in that, The stirring mechanism also includes arc-shaped material-dispensing blades. Multiple material-dispensing blades are provided and located at the upper end of the stirring shaft. The multiple material-dispensing blades are connected to the outer circumferential surface of the stirring shaft and arranged in a circular pattern.

3. The large-capacity 3DP printing mixing equipment according to claim 1, characterized in that, The mixing cylinder is a mixer tank. The output shaft of the mixing motor is driven and connected to the lower end of the mixing shaft. The second feed inlet is arranged facing upwards and is located below the first discharge outlet. The second discharge pipe is connected to the first discharge pipe. The first discharge pipe is inclined downwards and inserted into the first feed inlet. The first discharge pipe is provided with a baffle. The baffle is located on the rear side of the mixing cylinder and covers the first feed inlet.

4. The large-capacity 3DP printing mixing equipment according to claim 1, characterized in that, The storage tank is equipped with a screen, which is located above the stirring shaft and at the second feed inlet.

5. The large-capacity 3DP printing mixing equipment according to claim 1, characterized in that, The rotary drive device includes a drive motor and rollers; the rollers are provided in two sets and are located on the left and right sides of the mixing cylinder respectively. The outer circumferential surface of the rollers is in contact with the outer circumferential surface of the mixing cylinder. The output shaft of the drive motor is connected to the rollers to drive the rollers to rotate around their central axis extending back and forth.

6. The large-capacity 3DP printing mixing equipment according to claim 5, characterized in that, The roller is provided with a drive shaft, the drive shaft is provided with a first sprocket, the output shaft of the drive motor is provided with a second sprocket, and a chain is wound between the first sprocket and the second sprocket.

7. The large-capacity 3DP printing mixing equipment according to claim 1, characterized in that, It also includes a heat reflector and a heating element. The heat reflector is cylindrical and coaxially arranged with the mixing cylinder. The heat reflector is sleeved on the mixing cylinder and connected to the frame. Multiple heating elements are provided and located on the inner circumferential surface of the heat reflector. The multiple heating elements are arranged in a circular pattern.

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