WO2015131833A1 - Tête d'impression et imprimante 3d - Google Patents

Tête d'impression et imprimante 3d Download PDF

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Publication number
WO2015131833A1
WO2015131833A1 PCT/CN2015/073675 CN2015073675W WO2015131833A1 WO 2015131833 A1 WO2015131833 A1 WO 2015131833A1 CN 2015073675 W CN2015073675 W CN 2015073675W WO 2015131833 A1 WO2015131833 A1 WO 2015131833A1
Authority
WO
WIPO (PCT)
Prior art keywords
heater
printing
dimensional printer
print head
feeding
Prior art date
Application number
PCT/CN2015/073675
Other languages
English (en)
Chinese (zh)
Inventor
何永刚
Original Assignee
珠海天威飞马打印耗材有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 珠海天威飞马打印耗材有限公司 filed Critical 珠海天威飞马打印耗材有限公司
Publication of WO2015131833A1 publication Critical patent/WO2015131833A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/10—Processes of additive manufacturing
    • B29C64/106—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/10—Processes of additive manufacturing
    • B29C64/106—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
    • B29C64/118—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using filamentary material being melted, e.g. fused deposition modelling [FDM]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B29C64/205—Means for applying layers
    • B29C64/209—Heads; Nozzles

Definitions

  • the present invention relates to a component of a rapid prototyping apparatus and a rapid prototyping apparatus including the same, and more particularly to a printhead for a fused deposition type rapid prototyping apparatus and a three-dimensional printer including the same.
  • the present invention is based on a Chinese patent application filed on March 3, 2014, the entire disclosure of which is hereby incorporated by reference.
  • a three-dimensional printer is a device that constructs a three-dimensional object by layer-by-layer printing based on a digital model using materials such as powdered metal or plastic.
  • One of the three-dimensional printers supplies a molding material to the printhead in the form of a filament, and the molding material is heated to a molten state in an electric heating manner in the printing head, and the print head will be in accordance with the print head of the three-dimensional printer controller.
  • the moving path prints out the three-dimensional object layer by layer.
  • a background image of a patent document with the publication number CN1216726C describes a three-dimensional printer that supplies a molding material to a printhead in the form of a filament.
  • a filament 013 is wound on a reel 011, and the reel 011 is mounted.
  • the print head 015 Up to the reel 012 of the reel mount of the three-dimensional printer, the print head 015 that supplies the filament 013 to the three-dimensional printer can be realized.
  • the filament 013 is pulled from the reel 011 such that the straightened filament passes through the conduit 014 made of a material having less frictional resistance until the filament is fed to the printhead 015 by the motor
  • the controller of the three-dimensional printer controls the print head 015 to move in the horizontal XY plane while The control stage moves in a vertical Z-direction to print a three-dimensional object layer by layer; in addition, the controller of the three-dimensional printer controls the rate at which the supply rollers 0152 and 0153 supply the filaments to the heater 0151.
  • the conduit 014 is a hose; the print head 015 mounted on the printing cart is integrated with a heater 0151, a printing nozzle 01511, a motor 0154, a supply roller 0152, and a feed.
  • the roller 0153 so the quality of the print head is large and has a large inertia, resulting in a decrease in response sensitivity, and it is easy to cause vibration during the shifting process, causing the printing nozzle to constantly vibrate during the printing process, and the surface of the molded part is printed. Corrugation occurs, which affects the print quality; the rotation and shifting of the motor 0154 can also cause vibration of the print head; in addition, the increase in mass accelerates the wear of the contact surface between the print head and the guide rail.
  • a printhead assembly for use in a fused deposition modeling system is disclosed in the patent publication No. CN203381196U, the printhead assembly including a cooling unit, which is a unit containing a fan, the air being guided by the airflow generated by the fan Next, through the liquefier pump assembly and the cartridge assembly, the internal components of the printhead are forced to cool, thereby preventing the separation and material from melting prematurely.
  • the fan is mounted on the printhead, which not only constitutes a source of vibration for the vibration of the printhead, but also increases the inertia of the printhead, thereby reducing print quality.
  • a conventional three-dimensional printer includes a print head 03, a print box, a stage 04 and a print box mounting frame 02.
  • the print box is composed of a wire box 021 and a wire box 022 respectively carrying different color filaments.
  • the wire box 023 and the wire box 024 are formed.
  • the printhead 03 includes a print nozzle, a heater, a feed device, and a cooling device.
  • the heater of the print head 03 has heating and melting chambers 0321, 0322, 0323 and 0324, correspondingly to the printing nozzles 0311, 0312, 0313 communicating with the discharge ports of the four heating and melting chambers.
  • the feeding devices 0331, 0332, 0333, and 0334 correspondingly connected to the feeding ports of the four heating and melting chambers are correspondingly mounted to the cooling devices 0341, 0342, 0343, and 0344 on the substrates of the four heating and melting chambers.
  • the print head 03 of the structure shown in FIG. 3 not only increases the quality of the print head, but also increases the vibration source that causes the vibration of the print head, such as the drive motor on the feeding device and the fan on the cooling device, thereby reducing The print quality.
  • a primary object of the present invention is to provide a printhead for a three-dimensional printer that aims to reduce the vibration of the print nozzle of the printhead during printing and improve the print quality of the three-dimensional printer.
  • Another object of the present invention is to provide a three-dimensional printer including the above print head.
  • the present invention provides a print head for a three-dimensional printer comprising a print nozzle, a heater and a feeding device; the discharge port of the feeding device is in communication with a feed port of the heater; wherein the print nozzle is mounted in three dimensions
  • the printer is mounted on the printer; the heater is mounted on the frame of the 3D printer; the discharge port of the heater is connected to the feed port of the print nozzle through the hose, that is, the heater is heated in the melting chamber through the high temperature resistant hose.
  • the molding material in a molten state is conveyed to the printing nozzle; and a feeding pressure device is provided for supplying a feeding pressure to the heating and melting chamber of the heater.
  • the printhead further includes a vacuum device for providing a negative pressure to the heated melting chamber of the heater.
  • the controller of the three-dimensional printer controls the negative pressure device to supply a negative pressure to the heating and melting chamber of the heater, and sucks the residual molding material in the hose and the printing nozzle back into the heating and melting chamber to prevent the plugging from being soft. Tube and print nozzles, affecting subsequent printing.
  • the printhead further includes a cooling device for regulating the temperature of the heater and the feeding device.
  • the temperature of the heater is regulated by the cooling device, the temperature of the molding material extruded from the discharge port of the heater is uniform, the printing quality of the target molding is ensured, and the temperature of the feeding device is controlled to prevent the molding material from being in the feeding device.
  • the melt is melted to block the discharge port of the feeding device.
  • the hose has a layer of insulation layer, that is, a layer of non-heating insulation layer wrapped around the hose, or a layer of insulation layer having a heating function, or the hose itself.
  • insulation and / heating function it can effectively prevent the molding material in a molten state from coagulating in the hose and clogging the hose; it can effectively cope with the change of the ambient temperature around the hose.
  • the three-dimensional printer comprises a frame, a controller, a feeding device and a print head; the print head comprises a printing nozzle, a heater and a feeding device, and a discharge port and a heater of the feeding device
  • the feeding port is connected; the controller is controlled to be mounted with a controller controlled by the controller; the feeding device is for supplying the molding material to the feeding device; wherein the printing nozzle is mounted on the printing vehicle; the heater is installed on the machine
  • the discharge port of the heater is connected to the feed port of the print nozzle through the hose; the feed pressure device is used to supply the feed pressure to the heating and melting chamber of the heater.
  • the three-dimensional printer further includes a vacuum device for supplying a negative pressure to the heating and melting chamber of the heater.
  • the above three-dimensional printer further includes a cooling device for regulating the temperature of the heater and the feeding device.
  • the hose has a layer of insulation, that is, a layer of non-heating insulation layer wrapped around the hose, or a layer of insulation with a heating function, or a hose It has its own insulation and / heating function.
  • the discharge opening of the feeding device is located near the feed inlet of the feeding device. It is possible to realize that the feeding device directly supplies the molding material to the feeding device without using the conduit connection, and the molding material can be supplied to the printing head more efficiently than in the prior art.
  • the controller regulates the temperature in the heated melting chamber based on the detected temperature of the molding material in the hose and the printing nozzle, that is, regulates the temperature of the molding material extruded from the discharge port of the heater.
  • the temperature of the molding material extruded from the printing nozzle is kept uniform to ensure the quality of the target molding and to effectively cope with changes in the printing environment.
  • the print head provided by the invention has improved response sensitivity, meets high-speed printing requirements, and reduces the vibration of the printing nozzle caused by the shifting, effectively isolates the influence of the vibration source on the printing head on the printing nozzle, and reduces the printing nozzle in the printing process.
  • the printing position is more accurate; it can also effectively reduce the wear between the printing car and the rail contact surface.
  • FIG. 1 is a schematic structural view of a conventional three-dimensional printer
  • FIG. 2 is a structural view of another conventional three-dimensional printer
  • FIG. 3 is a schematic structural view of a print head of the three-dimensional printer of FIG. 2;
  • FIG. 4 is a schematic structural view of a first embodiment of a printhead of the present invention.
  • Figure 5 is a schematic structural view of a second embodiment of the printhead of the present invention.
  • Figure 6 is a partial enlarged view of A in Figure 5.
  • the print head is composed of a printing nozzle 1, a hose 2, a heater 3, a feeding device 4, a cooling device 5, and a supply pressure device 6.
  • the discharge port of the heater 3 communicates with the feed port of the print nozzle 1 through the hose 2, which is a high temperature resistant lightweight hose for heating the molten and heated chamber 31 of the heater 3 to a molten state.
  • the molding material is introduced into the printing nozzle 1; the feeding device 4 has a pair of feeding rollers disposed near the feeding port of the heater 3, and is used to control the thickness of the three-dimensional printer wire box under the control of the three-dimensional printer controller
  • the wire is fed into the heating and melting chamber 31 at a certain rate;
  • the cooling device 5 has a fan 51, and the airflow generated by the rotation of the fan 51 is used to regulate the temperature at the junction of the heater 3 and the heater 3 and the feeding device 4 to ensure entry.
  • the temperature of the molding material in the hose 2 is uniform, the printing effect is improved, and the molding material is prevented from being heated and melted at the junction of the heater 3 and the feeding device 4 to affect the feeding; the supply pressure device 6 is used to heat the melting chamber 31.
  • a certain air pressure is supplied, and the molding material in the molten state in the heating and melting chamber 31 is pressed into the hose 2, and is ejected from the outlet of the printing nozzle 1 to realize printing, and can be effectively controlled by controlling the air pressure in the heating and melting chamber 31.
  • forming Feed flow rate of the hose 2 and the printing nozzles 1 can effectively cope with different flowability of the molding material; printing nozzles for printing is provided with the car mounted on the three-dimensional printer mounting plate 11 on the print nozzles 1.
  • the printing nozzle, the hose, the heating and melting chamber of the heater, the feeding device, the cooling device and the feeding pressure device of the print head are all four, respectively, the printing nozzles 211 and 212. , 213 and 214, hoses 221, 222, 223 and 224, heating and melting chambers 231, 232, 233 and 234 of the heater, feeding devices 241, 242, 243 and 244, cooling devices 251, 252, 253 and 254, And feeding pressure devices 261, 262, 263 and 264; four printing nozzles are mounted on the printing cart of the three-dimensional printer through the mounting plate 2111 for respectively printing three basic colors and black molding materials; the hoses 221, 222, 223 The print nozzle and heater are connected to the 224 in the form of a tube.
  • a negative pressure device is provided on the print head for providing the heating and melting chamber of the heater. Negative pressure, after printing the target molded part, sucks the molding material in the printing nozzle and the hose back into the heating and melting chamber, effectively preventing the residual molding material from condensing in the hose and the printing nozzle, hindering subsequent printing.
  • a heat-insulating layer having no heat generation function is additionally disposed outside the hose, which is particularly suitable for the length of the hose.
  • a longer printhead prevents the molding material from solidifying in the hose and clogging the hose.
  • the heat insulating layer is a heat-insulating heat-insulating layer controlled by a controller.
  • the three-dimensional printer is composed of a rack, a printing cart, a feeding device, a controller and a print head; the print head is the same as the first embodiment of the above print head, and the printing nozzle is mounted on the printing vehicle through the mounting plate of the printing nozzle, and the heater is installed.
  • the printing cart is movably disposed on the rail of the rack, and the printing nozzle moves relative to the stage with the movement of the printing cart;
  • the feeding device is a wire attached to the wire box mounting bracket of the rack
  • the cartridge provides the molding material to the feeding device of the printing head in the form of a filament; the feeding port of the feeding device of the printing head is disposed near the discharge opening of the wire cartridge.
  • the filaments in the wire box are pulled out until the filaments are fed to a pair of feed rollers driven by the motor on the feeding device, and the controller controls the feeding device to the heater by controlling the rotation speed of the motor.
  • the controller controls the supply pressure device to apply a certain pressure to the heating and melting chamber, and the molten molding material passes through the hose at a certain rate and reaches the printing nozzle, and sprays the printing nozzle at a certain rate under the pressure; the controller controls The movement of the printing car relative to the guide rail, so that the printing nozzle moves relative to the loading stage according to a predetermined design path, and the target molding is printed; after the printing of the target molding is completed, the controller controls the printing vehicle to move the printing nozzle out of the target molding.
  • the print head is the print head in the second embodiment of the above print head, instead of the above print The print head in the first embodiment.
  • the controller controls the different color print heads to print different color parts of the target molding according to the design requirements of the target molding, thereby realizing the printing of the multi-color target molding.
  • the print head of the three-dimensional printer of this example is further provided with a negative pressure device for supplying a negative pressure to the heating and melting chamber of the heater, and sucking the molding material in the printing nozzle and the hose back into the heating and melting chamber.
  • the controller closes the supply pressure device, opens the negative pressure device, and sucks the residual molding material in the hose and the printing nozzle back into the heating melting chamber to prevent the residual molding material from condensing.
  • the inside of the hose and print nozzle affects the next print.
  • the heat insulating layer is a heat-insulating insulating layer controlled by a controller.
  • the feeding device is not a wire cartridge that supplies the molding material to the printing head in the form of a wire. Instead, a hopper of molding material is provided to the printhead in granular or powder form.
  • the concept of the present invention is mainly to install the print nozzle of the print head on the printing cart of the three-dimensional printer, move along with the print cart, and install other parts of the print head on the frame of the three-dimensional printer, the heater and the print head.
  • the nozzles are connected by a hose to reduce the quality of the moving part, thereby improving the response sensitivity of the printing vehicle, reducing the vibration of the printing nozzle during the printing process, and improving the printing quality; according to the concept, the structure of the printing head, the feeding mode and the control method There are also many obvious changes.
  • the feeding device is mounted on the frame of the three-dimensional printer, and the three-dimensional printer that supplies the molding material to the printing head in the form of a filament can set the feeding port of the feeding device to the discharge port of the feeding device of the three-dimensional printer.
  • the feeding device can be used
  • the feed port is located near the discharge port of the hopper, and there is no need to use a conduit to connect or place the hopper on the printing cart as compared with the prior art.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Optics & Photonics (AREA)
  • Ink Jet (AREA)

Abstract

La présente invention concerne une tête d'impression utilisée pour un dispositif de moulage rapide par dépôt de fil en fusion. La tête d'impression comprend une buse d'impression, un dispositif de chauffage et un dispositif d'alimentation. Une ouverture de sortie du dispositif d'alimentation est en communication avec une ouverture d'alimentation du dispositif de chauffage. La buse d'impression est montée sur un charriot d'impression d'une imprimante 3D. Le dispositif de chauffage est monté sur un châssis de l'imprimante 3D L'ouverture de sortie du dispositif de chauffage est en communication avec l'ouverture d'alimentation de la buse d'impression grâce à un tuyau souple, c'est-à-dire que les matériaux à mouler dans un état fondu présents dans une chambre de fusion par chauffage du dispositif de chauffage sont transportés dans la buse d'impression en passant par le tuyau souple résistant aux hautes températures. Un dispositif de mise sous pression à l'alimentation est utilisé pour la mise sous pression à l'alimentation de la chambre de fusion par chauffage du dispositif de chauffage. De plus, l'invention concerne également une imprimante 3D comprenant la tête d'impression.
PCT/CN2015/073675 2014-03-06 2015-03-05 Tête d'impression et imprimante 3d WO2015131833A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201410081000.9A CN103895223B (zh) 2014-03-06 2014-03-06 打印头及三维打印机
CN201410081000.9 2014-03-06

Publications (1)

Publication Number Publication Date
WO2015131833A1 true WO2015131833A1 (fr) 2015-09-11

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Application Number Title Priority Date Filing Date
PCT/CN2015/073675 WO2015131833A1 (fr) 2014-03-06 2015-03-05 Tête d'impression et imprimante 3d

Country Status (2)

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CN (1) CN103895223B (fr)
WO (1) WO2015131833A1 (fr)

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CN108099178A (zh) * 2017-12-19 2018-06-01 北京太尔时代科技有限公司 3d打印机喷头、打印机及打印方法
CN108215161A (zh) * 2017-03-07 2018-06-29 桂林凯歌信息科技有限公司 快速成形全彩3d打印机装置及其打印方法
CN108688153A (zh) * 2018-06-26 2018-10-23 珠海天威飞马打印耗材有限公司 打印头、三维打印机及其打印方法
CN113619117A (zh) * 2021-08-03 2021-11-09 周建伟 一种送料通畅便于原料回收的自清理3d数码打印机
WO2022010411A1 (fr) * 2020-07-09 2022-01-13 Ememo Solutions Ab Appareil d'imagerie tridimensionnelle comprenant de multiples buses passives pour la modélisation d'un objet tridimensionnel à multiples matériaux
CN114290669A (zh) * 2017-05-16 2022-04-08 南京三迭纪医药科技有限公司 3d打印设备和方法
EP4061620A4 (fr) * 2019-12-09 2023-12-27 Essentium, Inc. Construction d'imprimante modulaire amortie dans les trois dimensions x, y, z

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CN103895223B (zh) * 2014-03-06 2016-08-24 珠海天威飞马打印耗材有限公司 打印头及三维打印机
CN104191612A (zh) * 2014-07-24 2014-12-10 合肥斯科尔智能科技有限公司 一种双重加热喷射的立体打印机
CN105346079A (zh) * 2014-08-22 2016-02-24 深圳市宏山科园科技有限公司 一种3d蜡像打印机
CN104720087B (zh) * 2015-03-19 2017-07-11 杭州铭展网络科技有限公司 粘流态材料3d打印机的连续供料系统及实现方法
CN104960206A (zh) * 2015-07-03 2015-10-07 北京威控睿博科技有限公司 一种3d打印机恒温打印喷头结构
CN106696295A (zh) * 2015-08-21 2017-05-24 研能科技股份有限公司 喷液装置
CN105128334A (zh) * 2015-09-07 2015-12-09 芜湖思瑞迪三维科技有限公司 一种兼具打磨功能的三维打印机
CN105128335A (zh) * 2015-09-07 2015-12-09 芜湖思瑞迪三维科技有限公司 一种具有自动清理功能的三维打印机
CN107139458B (zh) * 2017-06-27 2023-11-24 山东圣泉鼎铸三维模具科技有限公司 光固化3d打印设备及光固化打印方法
CN109094010A (zh) * 2018-07-05 2018-12-28 深圳市律远汇智科技有限公司 一种防堵塞的具有定量功能的3d打印机
CN111469399A (zh) * 2020-04-15 2020-07-31 江西服装学院 一种3d打印喷头
CN112248657B (zh) * 2020-10-22 2021-07-02 湖南凯通电子有限公司 一种用于热敏打印头降温冷却装置及其冷却方法
CN113929429B (zh) * 2021-11-25 2022-11-22 河北工业大学 喷射3d打印高延高韧磷酸镁水泥基复合材料及其制备方法

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CN103895223A (zh) * 2014-03-06 2014-07-02 珠海天威飞马打印耗材有限公司 打印头及三维打印机
CN203779870U (zh) * 2014-03-06 2014-08-20 珠海天威飞马打印耗材有限公司 打印头及三维打印机

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CN108215161B (zh) * 2017-03-07 2023-12-01 桂林凯歌信息科技有限公司 快速成形全彩3d打印机装置及其打印方法
CN114290669A (zh) * 2017-05-16 2022-04-08 南京三迭纪医药科技有限公司 3d打印设备和方法
CN108099178A (zh) * 2017-12-19 2018-06-01 北京太尔时代科技有限公司 3d打印机喷头、打印机及打印方法
CN108688153A (zh) * 2018-06-26 2018-10-23 珠海天威飞马打印耗材有限公司 打印头、三维打印机及其打印方法
CN108688153B (zh) * 2018-06-26 2024-04-19 珠海天威增材有限公司 打印头、三维打印机及其打印方法
EP4061620A4 (fr) * 2019-12-09 2023-12-27 Essentium, Inc. Construction d'imprimante modulaire amortie dans les trois dimensions x, y, z
WO2022010411A1 (fr) * 2020-07-09 2022-01-13 Ememo Solutions Ab Appareil d'imagerie tridimensionnelle comprenant de multiples buses passives pour la modélisation d'un objet tridimensionnel à multiples matériaux
CN113619117A (zh) * 2021-08-03 2021-11-09 周建伟 一种送料通畅便于原料回收的自清理3d数码打印机
CN113619117B (zh) * 2021-08-03 2024-01-12 大河数智(泉州)增材技术有限公司 一种送料通畅便于原料回收的自清理3d数码打印机

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