Leveling roller ink removing device and wax spraying 3D printer

Abstract

The invention relates to the technical field of wax spraying 3D printing, in particular to a leveling roller ink removing device and a wax spraying 3D printer. The leveling roller ink removing device comprises a fixed base, a leveling roller rotationally and fixedly connected to the fixed base, a motor assembly which is in driving connection with the leveling roller and drives the leveling roller to rotate, and a heating assembly for heating the leveling roller. A negative pressure cavity is formed in the leveling roller, one end of the leveling roller is connected with negative pressure power in a sealed mode, the leveling roller is made of micropore ceramic materials, a plurality of densely-arranged micropores are formed in the surface and the interior of the leveling roller, and the micropores are communicated with the negative pressure cavity. The technical problems that a leveling roller of an existing wax spraying 3D printer is low in leveling and ink removing efficiency and poor in effect, the leveling roller is in an extrusion contact state with a scraper for a long time, parts are prone to abrasion, the service life is shortened, and the use cost is increased are solved.

Description

Technical Field

[0001] The present application relates to the technical field of wax-jet 3D printing, and in particular to a leveling roller ink removal device and a wax-jet 3D printer. Background Art

[0002] The leveling and ink removal process of existing wax-jet 3D printers is generally as follows: the 3D model is placed on a printing platform, and the nozzle sprays wax material downward onto the upper surface of the 3D model. After printing a layer, the printing platform drives the 3D model to move horizontally relative to the nozzle and the leveling roller. When the 3D model moves under the leveling roller, the leveling roller, which rotates at high speed and has a surface heated to above 100°C, melts the wax material that protrudes from the 3D model layer, and the wax material that protrudes from the surface adheres to the surface of the leveling roller. Then, a scraper is used to remove the wax material on the surface of the leveling roller to complete the leveling and ink removal process.

[0003] However, the above-mentioned existing leveling roller is generally made of metal material, and then ceramic is sprayed on the surface, and then the surface is polished to make the roller surface roughness Ra at 0.1um. Such a smooth surface is helpful for the scraper to remove the wax material on the roller surface, but the smoother the surface of the leveling roller, the worse its ability to remove the wax material, the less wax material is removed, the lower the leveling and ink removal efficiency is, and the effect is poor. It can meet the use requirements for printing with low precision and low nozzle spray volume, but it cannot meet the requirements for printing high-precision models or multi-nozzle and large-volume machines; moreover, the leveling roller and the scraper are in a state of extrusion contact for a long time, and there is serious mechanical wear, which affects the service life and increases the cost of use. Summary of the invention

[0004] The purpose of the present application is to provide a leveling roller ink removal device and a wax-jet 3D printer to solve the technical problems that the leveling roller of the existing wax-jet 3D printer has low leveling and ink removal efficiency and poor effect, is in a state of extrusion contact with the scraper for a long time, and the parts are easily worn, which reduces the service life and increases the cost of use.

[0005] In a first aspect, the present application provides a leveling roller ink removal device, comprising:

[0006] A fixed base, a leveling roller rotatably and fixedly connected to the fixed base, a motor assembly drivingly connected to the leveling roller to drive the leveling roller to rotate, and a heating assembly for heating the leveling roller;

[0007] The leveling roller has a negative pressure chamber inside, one end of which is sealed and connected to a negative pressure power source. The leveling roller is made of microporous ceramic material so that the surface and interior of the leveling roller have a plurality of densely arranged micropores, and each of the micropores is connected to the negative pressure chamber.

[0008] Furthermore, each of the micropores has a pore size of micrometer or submicrometer level; and / or

[0009] The contact angle θ of the surface of the smoothing roller is less than 90°.

[0010] Furthermore, the axial center position of the leveling roller has an axial hole extending along the axial center line direction thereof, the axial hole is the negative pressure chamber, and the two opposite ends of the axial hole are connected and the ports are sealed.

[0011] Furthermore, the heating assembly includes a heating tube and a heating sleeve with an open end;

[0012] The aperture of the heating sleeve is smaller than that of the axial hole, the aperture of the heating tube is smaller than that of the heating sleeve, the heating sleeve can be placed into the axial hole through the heating port side of the axial hole along the axial direction, the heating tube can be placed into the heating sleeve through the open end of the heating sleeve along the axial direction, and the electrical connecting wire of the heating tube is led out through the open end of the heating sleeve and is used to be electrically connected to the heating source, and the open end of the heating sleeve and the heating port side of the axial hole are both sealed by a sealing structure.

[0013] Furthermore, the two opposite port sides of the axial hole are respectively a negative pressure port side for connecting to a negative pressure power, and a heating port side for placing the heating sleeve and the heating tube;

[0014] The flattening roller ink removal device also includes a negative pressure side rotary seal seat and a heating side rotary seal seat which are coaxially rotatably fixedly connected to the opposite two ends of the flattening roller and are also dynamically sealed to the negative pressure port side and the heating port side of the axial hole, respectively.

[0015] The negative pressure side rotating seal seat and the heating side rotating seal seat are fixedly connected to the fixed base, the negative pressure side rotating seal seat has a negative pressure sealing interface for accessing negative pressure power, and the opening end of the heating sleeve is statically sealed and fixedly connected to the heating side rotating seal seat.

[0016] Furthermore, the dynamic sealing connection adopts a dynamic sealing ring, through which the shaft shoulders at the opposite ends of the leveling roller respectively form a rotating dynamic seal with the negative pressure side rotating sealing seat and the heating side rotating sealing seat;

[0017] The outer ring of the dynamic sealing ring is fixed to the inner hole of the negative pressure side rotating sealing seat or the heating side rotating sealing seat to form a static seal, the inner ring of the dynamic sealing ring is rotationally sealed with the shoulder of the leveling roller, the dynamic sealing ring, the negative pressure side rotating sealing seat or the heating side rotating sealing seat, and the shoulder of the leveling roller form a lubrication chamber, and the lubrication chamber is filled with high-temperature grease.

[0018] Furthermore, there is a spacing space between the other closed end of the heating sleeve away from the open end thereof and the negative pressure port side of the axial hole; and / or

[0019] The microporous ceramic material is made of silicon carbide or alumina ceramic material.

[0020] Furthermore, a first temperature sensor is installed on the end surface of the negative pressure side rotary seal seat for being electrically connected to a system terminal; and / or

[0021] A second temperature sensor is installed on the end surface of the heating-side rotary seal seat for electrical connection with the system terminal.

[0022] Furthermore, a first bearing and a second bearing are respectively installed at opposite ends of the leveling roller, for limiting the radial rotational movement of the leveling roller;

[0023] The opposite ends of the leveling roller are respectively a driving end and a driven end, the driving end is provided with a multi-V belt driven wheel, the multi-V belt driven wheel is transmission-connected to the multi-V belt driving wheel of the motor assembly through a multi-V belt, and the multi-V belt driving wheel is transmission-connected to the motor of the motor assembly.

[0024] In a second aspect, the present application provides a wax-jet 3D printer, comprising the leveling roller ink removal device described in any one of the above, as well as a nozzle, a printing platform plate located below the leveling roller ink removal device and the nozzle, and a 3D model placed on the printing platform plate.

[0025] Compared with the prior art, the present application provides a leveling roller ink removal device and a wax-jet 3D printer using the leveling roller ink removal device. The fixed base of the leveling roller ink removal device is used to fix the overall leveling roller ink removal device to a designated installation position of the wax-jet 3D printer, the leveling roller is rotatably fixedly connected to the fixed base, the motor assembly is connected to the leveling roller driving and drives the leveling roller to achieve high-speed rotation, and the heating assembly heats the leveling roller so that the leveling roller can reach a temperature of more than 100°C during operation, reaching the operating temperature, so as to be able to melt the wax material of the protruding portion of the 3D model. Among them, the interior of the leveling roller is provided with a negative pressure cavity, one end of which is sealed and connected to the negative pressure power. The leveling roller is a microporous ceramic body made of microporous ceramic material, so that the surface and interior of the leveling roller have a large number of densely arranged micropores, and the pore size of each micropore is in the micron or submicron order. These micropores are very small and basically invisible to the naked eye, but these micropores exist in large numbers on the surface or inside of the ceramic, forming a rich pore structure, and each micropore is connected to the negative pressure cavity, so that the wax material adhered to the surface of the leveling roller can be sucked into the cavity by the negative pressure cavity connected to the negative pressure power, and discharged from the end connected to the negative pressure.

[0026] The leveling roller made of this microporous ceramic material has a large number of microporous structures on its surface, which greatly improves the ink-carrying ability of the leveling roller surface, that is, improves the ability to carry away wax materials, thereby greatly improving the leveling and ink removal efficiency of the leveling roller, and the ink removal effect is also better; at the same time, the wax materials adhered to the surface of the leveling roller are sucked away by the negative pressure chamber connected to the negative pressure power and discharged from the end connected to the negative pressure, so that there is no wax material that needs to be removed on the surface of the leveling roller, and there is no need for a scraper to scrape the wax material on the surface of the leveling roller, and there is no scraper in long-term extrusion contact with the leveling roller, and there is no mechanical wear caused by this, which improves the service life of the leveling roller and reduces the cost of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 A schematic diagram of ink removal by a leveling roller of a wax-jet 3D printer provided in an embodiment of the present application;

[0029] Figure 2 A top view of the leveling roller ink removal device provided in an embodiment of the present application;

[0030] Figure 3 A cross-sectional view of a leveling roller ink removal device provided in an embodiment of the present application;

[0031] Figure 4 A partially cutaway structural diagram of a leveling roller ink removal device provided in an embodiment of the present application;

[0032] Figure 5 A side view of a leveling roller ink removal device provided in an embodiment of the present application;

[0033] Figure 6 A schematic diagram of the wax material on the surface of the leveling roller provided in an embodiment of the present application being sucked in and discharged;

[0034] Figure 7 A partially cutaway structural diagram of a leveling roller provided in an embodiment of the present application;

[0035] Figure 8 A schematic diagram of the structure of the motor assembly provided in an embodiment of the present application.

[0036] Reference numerals:

[0037] 100-leveling roller ink removal device;

[0038] 10-Fix the base;

[0039] 20-leveling roller;

[0040] 21- micropores;

[0041] 22-axial hole;

[0042] 221-negative pressure port side;

[0043] 222-heating port side;

[0044] 223-interval space;

[0045] 23-active end;

[0046] 231-first dynamic sealing ring;

[0047] 232-Multi-V belt driven wheel;

[0048] 233-first bearing;

[0049] 24- driven end;

[0050] 241-second dynamic sealing ring;

[0051] 242- second bearing;

[0052] 243-Copper ring;

[0053] 244-wave elastic washer;

[0054] 30- heating component;

[0055] 31- heating tube;

[0056] 311-electrical connecting wire;

[0057] 32-heating sleeve;

[0058] 321-open end;

[0059] 322-static sealing ring;

[0060] 323-third screw;

[0061] 324-closed end;

[0062] 40-negative pressure side rotary sealing seat;

[0063] 41-negative pressure sealing interface;

[0064] 42-first screw;

[0065] 43- a first temperature sensor;

[0066] 50-heating side rotating seal seat;

[0067] 51- second screw;

[0068] 52- a second temperature sensor;

[0069] 60-motor assembly;

[0070] 61-Multi-V belt driving wheel;

[0071] 62-motor;

[0072] 621-output shaft;

[0073] 63-motor fixing plate;

[0074] 64-compression spring;

[0075] 65-motor rotation pin;

[0076] 66-motor fixing seat;

[0077] 70-Multi-V belt;

[0078] 201-nozzle;

[0079] 202-3D model;

[0080] 203-Printing platform plate. DETAILED DESCRIPTION

[0081] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0082] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0083] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0084] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0085] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0086] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0087] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0088] like Figures 1 to 8 As shown, the embodiment of the present application provides a leveling roller ink removal device 100, and a wax-jet 3D printer using the leveling roller ink removal device 100. The leveling roller ink removal device 100 comprises: a fixed base 10, a leveling roller 20 rotatably fixedly connected to the fixed base 10, a motor assembly 60 drivingly connected to the leveling roller 20 to drive the leveling roller 20 to rotate, and a heating assembly 30 for heating the leveling roller 20.

[0089] Among them, the interior of the leveling roller 20 has a negative pressure chamber, one end of the negative pressure chamber is sealed and connected to the negative pressure power. The leveling roller 20 is made of microporous ceramic material, so that the surface and interior of the leveling roller 20 have a large number of densely arranged micropores 21, and each micropore 21 is connected to the negative pressure chamber.

[0090] Compared with the prior art, the embodiment of the present application provides a leveling roller ink removal device 100 and a wax-jet 3D printer using the leveling roller ink removal device 100. The fixed base 10 of the leveling roller ink removal device 100 is used to fix the entire leveling roller ink removal device 100 to a designated installation position of the wax-jet 3D printer, and the leveling roller 20 is rotatably fixedly connected to the fixed base 10. Specifically, the two opposite ends of the leveling roller 20 along the axial direction are rotatably fixedly connected to the fixed base 10, and the motor assembly 60 is drivingly connected to the leveling roller 20 and drives the leveling roller 20 along the axis. Figure 1 The flattening roller 20 rotates at high speed in the W direction as shown, and the heating component 30 heats the flattening roller 20, so that the flattening roller 20 can reach a temperature of more than 100°C during operation, reaching the working temperature, so as to melt the wax material Δs of the 3D model 202. The flattening roller 20 has a negative pressure chamber inside, and one end of the negative pressure chamber is sealed and connected to the negative pressure power. The flattening roller 20 is a microporous ceramic body made of microporous ceramic material, so that the surface and interior of the flattening roller 20 have a large number of densely arranged micropores 21, and the aperture of each micropore 21 is micron-level or submicron-level aperture size. These micropores 21 are very small and basically invisible to the naked eye, but these micropores 21 exist in large numbers on the surface or inside of the ceramic, forming a rich pore structure, and each micropore 21 is connected to the negative pressure chamber, so that the wax material adhered to the surface of the flattening roller 20 can be sucked into the negative pressure chamber connected to the negative pressure power, and discharged from the end connected to the negative pressure.

[0091] The leveling roller 20 made of this microporous ceramic material has a large number of micropores 21 on its surface. The surface is relatively rough with a high roughness. The higher the surface roughness, the more wax material can be taken away, which greatly improves the ink-carrying ability of the surface of the leveling roller 20, that is, improves the ability to take away wax material, and thus greatly improves the leveling and ink removal efficiency of the leveling roller 20, and the ink removal effect is also better; at the same time, the wax material adhered to the surface of the leveling roller 20 is sucked away by the negative pressure chamber connected to the negative pressure power and discharged from the end connected to the negative pressure, so that there is no wax material that needs to be removed on the surface of the leveling roller 20, and there is no need for a scraper to scrape the wax material on the surface of the leveling roller 20, and there is no scraper in long-term extrusion contact with the leveling roller 20, and there is no mechanical wear caused by this, which improves the service life of the leveling roller 20 and reduces the cost of use.

[0092] Specifically, Figure 1 As shown, the wax-jet 3D printer includes the leveling roller ink removal device 100, a nozzle 201 arranged side by side with the leveling roller ink removal device 100, and a printing platform plate 203 located below the leveling roller ink removal device 100 and the nozzle 201, a 3D model 202 is placed on the printing platform plate 203, and the printing platform plate 203 can drive the 3D model 202 to move linearly along the horizontal direction a.

[0093] The specific operation process may be that, first, the nozzle 201 sprays the wax material downward onto the upper surface of the 3D model 202 placed on the printing platform plate 203; then, the printing platform plate 203 drives the 3D model 202 to move to the bottom of the leveling roller 20. At this time, the leveling roller 20 driven by the motor assembly 60 to rotate at a high speed and heated to above 100°C by the heating assembly 30 melts the protruding portion of the wax material Δs of the 3D model 202, retaining the wax material s of the 3D model after leveling, and the removed wax material (that is, the protruding portion of the wax material Δs) adheres to the surface of the leveling roller 20. The surface and interior of the leveling roller 20 have a large number of densely arranged micropores 21, and these micropores 21 are connected to the negative pressure chamber. The wax materials adhered to the surface of the leveling roller 20 are sucked into the negative pressure chamber connected to the negative pressure power, and are discharged from the end connected to the negative pressure, such as Figure 6 As shown, the direction of the arrow indicates the moving direction in which the wax material is sucked in and then discharged; after one shaping and ink removal, the printing platform plate 203 moves back, and the 3D model 202 is finely shaped and ink-removed for a second time by the leveling roller 20; the nozzle 201 moves horizontally to repeat the above printing and leveling and ink removal process until this layer is completely printed, and then the nozzle 201 rises by one layer thickness, and then prints the next layer.

[0094] In a preferred embodiment, the contact angle θ of the surface of the flattening roller 20 is smaller than 90°. Since the ceramic material is a hydrophilic material, its contact angle θ is smaller than 90°. According to the Wenzel theory, cosθ w =rcosθ, where θ w represents the contact angle (on a rough surface), θ refers to the Young's contact angle (on an ideal smooth surface), and r refers to the roughness ratio (1.0 for an ideal smooth surface); if θ<90°, then θ w As the surface roughness increases, it decreases, which is beneficial to wetting; but if θ>90°, θ w As the roughness increases, it becomes larger, which is obviously not conducive to infiltration. The microporous ceramic has many micropores 21 on the surface and inside, which can increase the contact area between the leveling roller 20 and the wax liquid, reduce the solid-liquid contact angle θ, and increase the degree of wetting of the solid surface by the droplets, thereby improving the ability of the leveling roller 20 to scrape the wax liquid on the surface of the 3D model 202, that is, to improve the ink-carrying ability of the surface of the leveling roller 20 and improve the leveling and ink removal efficiency of the leveling roller 20.

[0095] A specific embodiment is as follows Figure 3 , Figure 4 , Figure 6 and Figure 7As shown, the axis position of the leveling roller 20 has an axis hole 22 extending along the axis center line thereof, and the two opposite ends of the axis hole 22 are connected and the ports are sealed. The axis hole 22 is the aforementioned negative pressure chamber, and the negative pressure chamber is configured as the axis hole 22 structure, which can make the micro pores 21 on the surface and inside of the ceramic be more directly and quickly sucked into the axis hole 22 located at the axis center, thereby improving the speed and efficiency of removing the wax material on the surface of the leveling roller 20, and at the same time, the space occupied by the negative pressure chamber is increased as much as possible, thereby improving the discharge efficiency.

[0096] On the basis of the aforementioned embodiment, a preferred embodiment is that the heating assembly 30 of the aforementioned leveling roller ink removal device 100 may specifically include a heating tube 31 and a heating sleeve 32 with one end open; the aperture of the heating sleeve 32 is smaller than the aperture of the aforementioned axial hole 22, the aperture of the heating tube 31 is smaller than the aperture of the heating sleeve 32, and the two opposite port sides of the axial hole 22 are respectively a negative pressure port side 221 for connecting to negative pressure power and a heating port side 222 for placing the heating sleeve 32 and the heating tube 31; in this way, the The heating sleeve 32 can be placed into the axial hole 22 along the axial direction through the heating port side 222 of the axial hole 22, and the heating tube 31 can be placed into the heating sleeve 32 along the axial direction through the open end 321 of the heating sleeve 32, and the electrical connection line 311 of the heating tube 31 is led out through the open end 321 of the heating sleeve 32 and is used to be electrically connected to the heating source. The open end 321 of the heating sleeve 32 and the heating port side 222 of the axial hole 22 are both sealed by a sealing structure.

[0097] In this way, through the sealing structure of the heating sleeve 32, the sealing isolation between the heating tube 31 and the axial hole 22 of the leveling roller 20 is achieved, so that the negative pressure suction work of the axial hole 22 and the heating work of the heating tube 31 do not affect each other, and at the same time, the two can work better.

[0098] Furthermore, if Figures 2 to 6 As shown, the leveling roller ink removal device 100 provided in the embodiment of the present application also includes a negative pressure side rotating seal seat 40 and a heating side rotating seal seat 50 which are coaxially rotatably fixedly connected to the opposite two end sides of the leveling roller 20 and are also dynamically sealed to the negative pressure port side 221 and the heating port side 222 at the opposite ends of the axial hole 22, respectively. The negative pressure side rotating seal seat 40 and the heating side rotating seal seat 50 are both fixedly connected to the fixed base 10, and can be specifically fixedly connected to the fixed base 10 by a first screw 42 and a second screw 51, respectively, so as to realize the end positioning of the leveling roller 20 and the end sealing of the axial hole 22.

[0099] The negative pressure side rotary seal seat 40 has a negative pressure seal interface 41 for connecting to the negative pressure power. Specifically, the negative pressure seal interface 41 can be a cylindrical structure extending through the inner side and introduced into the axial center hole 22 of the leveling roller 20, and preferably there is a gap between the cylindrical structure and the axial center hole 22. The open end 321 of the heating sleeve 32 can be connected and fixed with the heating side rotary seal seat 50 through a static seal ring 322, and then the end seal is realized by pressing and tightening the third screw 323. In addition, the heating sleeve 32 and the heating side rotary seal seat 50 are positioned by the shaft shoulder to ensure that the heating sleeve 32 and the leveling roller 20 are coaxially and concentrically arranged.

[0100] like Figure 3 , Figure 5 and Figure 6 As shown, the aforementioned dynamic sealing connection may specifically adopt a dynamic sealing ring, which may specifically include a first dynamic sealing ring 231 and a second dynamic sealing ring 241. Through the first dynamic sealing ring 231 and the second dynamic sealing ring 241, the axial shoulders at the opposite ends of the leveling roller 20 form a rotating dynamic seal with the negative pressure side rotating sealing seat 40 and the heating side rotating sealing seat 50 respectively.

[0101] Specifically, the first dynamic seal ring 231 and the second dynamic seal ring 241 can both be skeleton-type rubber seal rings. The first dynamic seal ring 231 and the second dynamic seal ring 241 can both be paired face-to-face installation structures. The outer ring of the first dynamic seal ring 231 is fixed to the inner hole of the negative pressure side rotary seal seat 40 to form a static seal. The inner ring of the first dynamic seal ring 231 is rotated with the shoulder of the active end 23 of the leveling roller 20 to form a lubrication chamber. The first dynamic seal ring 231, the negative pressure side rotary seal seat 40 and the shoulder of the active end 23 of the leveling roller 20 form a lubrication chamber. The lubrication chamber is located in the first dynamic seal. The second dynamic seal ring 231 and the shoulder of the negative pressure side rotating seal seat 40, the lubrication chamber is filled with high-temperature grease; similarly, the outer ring of the second dynamic seal ring 241 is fixed to the inner hole of the heating side rotating seal seat 50 to form a static seal, the inner ring of the second dynamic seal ring 241 and the shoulder of the driven end 24 of the leveling roller 20 are rotated and sealed, the second dynamic seal ring 241, the heating side rotating seal seat 50 and the shoulder of the driven end 24 of the leveling roller 20 form a lubrication chamber, the lubrication chamber is located between the second dynamic seal ring 241 and the shoulder of the heating side rotating seal seat 50, and the lubrication chamber is filled with high-temperature grease.

[0102] A further embodiment is as follows Figure 3 and Figure 4 As shown, there is a spacing space 223 between the other closed end 324 of the heating sleeve 32 away from its open end 321 and the negative pressure port side 221 of the axial hole 22. On the one hand, it is beneficial to heat the middle part between the two shoulders of the leveling roller 20; on the other hand, it can increase the cavity space close to the negative pressure side of the axial hole 22, thereby improving the efficiency of negative pressure suction.

[0103] In another further embodiment, the microporous ceramic material used to make the flattening roller 20 may be a ceramic material with high thermal conductivity, such as silicon carbide or aluminum oxide. In this way, the heat of the heating tube 31 installed in the axial hole 22 of the axis can be transferred to the surface of the flattening roller 20 more quickly. At the moment when the flattening roller 20 contacts the 3D model 202, the wax material Δs protruding from the 3D model 202 can be quickly melted and quickly removed by the rotation of the flattening roller 20 itself.

[0104] An optional embodiment is as follows Figure 3 and Figure 5 As shown, the end face of the negative pressure side rotating seal seat 40 can be installed with a first temperature sensor 43 for electrically connecting to the system terminal for the system's temperature measurement and temperature control requirements; the end face of the heating side rotating seal seat 50 can also be installed with a second temperature sensor 52 for electrically connecting to the system terminal for the system's temperature measurement and temperature control requirements.

[0105] like Figures 3 to 6 As shown, the opposite ends of the leveling roller 20 provided in the embodiment of the present application are respectively a driving end 23 and a driven end 24, and the driving end 23 and the driven end 24 are respectively installed with a first bearing 233 and a second bearing 242, which are used to limit the radial rotation movement of the leveling roller 20; the driving end 23 is installed with a multi-V belt driven wheel 232, and the multi-V belt driven wheel 232 is transmission-connected to the multi-V belt driving wheel 61 of the motor assembly 60 through the multi-V belt 70, and the multi-V belt driving wheel 61 is transmission-connected to the motor 62 of the motor assembly 60.

[0106] Among them, a specific embodiment is that the aforementioned first bearing 233 forms a fixed end through the fixed base 10 and the shoulder of the leveling roller 20, the second bearing 242 is circumferentially provided with a copper ring 243 and a corrugated elastic washer 244, and there is an axial gap between the matching holes of the fixed base 10 and the second bearing 242, forming a free end.

[0107] Another specific embodiment is, Figure 8 As shown, the motor assembly 60 includes a motor 62 providing a motive force, a multi-V belt driving wheel 61 coaxially connected to the output shaft 621 of the motor 62, a motor fixing plate 63, a compression spring 64, a motor rotating pin 65 and a motor fixing seat 66. The motor fixing plate 63 is limited in rotation along the motor rotating pin 65, and the compression spring force acts on the motor fixing plate 63 to push the motor 62 to rotate clockwise, thereby tensioning the multi-V belt 70.

[0108] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A leveling roller de-inking device, characterized in that: include: A fixed base, a leveling roller rotatably and fixedly connected to the fixed base, a motor assembly drivingly connected to the leveling roller to drive the leveling roller to rotate, and a heating assembly for heating the leveling roller; The leveling roller has a negative pressure chamber inside, one end of which is sealed and connected to a negative pressure power source. The leveling roller is made of microporous ceramic material so that the surface and interior of the leveling roller have a plurality of densely arranged micropores, and each of the micropores is connected to the negative pressure chamber.

2. The de-inking device for a leveling roller according to claim 1, characterized in that: Each of the micropores has a micrometer or submicrometer pore size; and / or The contact angle θ of the surface of the smoothing roller is less than 90°.

3. The de-inking device for a leveling roller according to claim 1 or 2, characterized in that: The axial center position of the leveling roller has an axial hole extending along the axial center line direction thereof, the axial hole is the negative pressure chamber, and the two opposite ends of the axial hole are connected and the ports are sealed.

4. The de-inking device for a leveling roller according to claim 3, characterized in that: The heating assembly comprises a heating tube and a heating sleeve with an opening at one end; The aperture of the heating sleeve is smaller than that of the axial hole, the aperture of the heating tube is smaller than that of the heating sleeve, the heating sleeve can be placed into the axial hole through the heating port side of the axial hole along the axial direction, the heating tube can be placed into the heating sleeve through the open end of the heating sleeve along the axial direction, and the electrical connecting wire of the heating tube is led out through the open end of the heating sleeve and is used to be electrically connected to the heating source, and the open end of the heating sleeve and the heating port side of the axial hole are both sealed by a sealing structure.

5. The de-inking device for a leveling roller according to claim 4, characterized in that: The two opposite port sides of the axial hole are respectively a negative pressure port side for connecting to the negative pressure power, and a heating port side for placing the heating sleeve and the heating tube; The flattening roller ink removal device also includes a negative pressure side rotary seal seat and a heating side rotary seal seat which are coaxially rotatably fixedly connected to the opposite two ends of the flattening roller and are also dynamically sealed to the negative pressure port side and the heating port side of the axial hole, respectively. The negative pressure side rotating seal seat and the heating side rotating seal seat are fixedly connected to the fixed base, the negative pressure side rotating seal seat has a negative pressure sealing interface for accessing negative pressure power, and the opening end of the heating sleeve is statically sealed and fixedly connected to the heating side rotating seal seat.

6. The de-inking device for a leveling roller according to claim 5, characterized in that: The dynamic sealing connection adopts a dynamic sealing ring, through which the shaft shoulders at the opposite ends of the leveling roller respectively form a rotating dynamic seal with the negative pressure side rotating sealing seat and the heating side rotating sealing seat; The outer ring of the dynamic sealing ring is fixed to the inner hole of the negative pressure side rotating sealing seat or the heating side rotating sealing seat to form a static seal, the inner ring of the dynamic sealing ring is rotationally sealed with the shoulder of the leveling roller, the dynamic sealing ring, the negative pressure side rotating sealing seat or the heating side rotating sealing seat, and the shoulder of the leveling roller form a lubrication chamber, and the lubrication chamber is filled with high-temperature grease.

7. The de-inking device for a leveling roller according to claim 5 or 6, characterized in that: There is a spacing space between the other closed end of the heating sleeve away from the open end thereof and the negative pressure port side of the axial hole; and / or The microporous ceramic material is made of silicon carbide or alumina ceramic material.

8. The de-inking device for a leveling roller according to claim 5 or 6, characterized in that: A first temperature sensor is installed on the end surface of the negative pressure side rotary seal seat for being electrically connected to a system terminal; and / or A second temperature sensor is installed on the end surface of the heating-side rotary seal seat for electrical connection with the system terminal.

9. The de-inking device for a leveling roller according to claim 1, characterized in that: The first bearing and the second bearing are respectively installed at the opposite ends of the leveling roller, and are used to limit the radial rotation of the leveling roller; The opposite ends of the leveling roller are respectively a driving end and a driven end, the driving end is provided with a multi-V belt driven wheel, the multi-V belt driven wheel is transmission-connected to the multi-V belt driving wheel of the motor assembly through a multi-V belt, and the multi-V belt driving wheel is transmission-connected to the motor of the motor assembly.

10. A wax spray 3D printer, characterized in that: It comprises the leveling roller ink removal device according to any one of claims 1 to 9, as well as a nozzle, a printing platform plate located below the leveling roller ink removal device and the nozzle, and a 3D model placed on the printing platform plate.

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