CN-121973441-A - 3D printing device of corn stalk based composite material

CN121973441ACN 121973441 ACN121973441 ACN 121973441ACN-121973441-A

Abstract

The invention discloses a 3D printing device of a corn stalk based composite material, which belongs to the technical field of 3D printing and comprises a large-sized stirrer, a small-sized stirrer, a gear motor, a gate valve, a 3D printing spray head, a triaxial motion platform and a bracket. The large-scale stirrer is used for primarily crushing cornstalk raw materials through an internal stirring device and mixing the cornstalk raw materials with water to form an initial suspension, the suspension enters the small-scale stirrer through an upper gate valve and is mixed with an adhesive to form coagulated slurry after secondary crushing, the coagulated slurry is conveyed to a conical spray head through a lower gate valve, and a triaxial moving platform drives a printing surface to move to finish 3D printing operation. The device adopts a two-stage stirring and crushing structure, can realize the efficient refinement and uniform mixing of cornstalk raw materials, and improves the molding stability of materials by matching with plant-based adhesives. The method is simple and convenient to operate, is environment-friendly, provides a new path for high-value utilization of agricultural and forestry waste, and is suitable for preparing environment-friendly 3D printing materials.

Inventors

LI GUIWEI
WU WENZHENG
HUANG RUXUAN
HUANG CHAOYUE
LI RUIXIANG
WANG SIQI
MA CHUANCHAO
Shen Minyang
ZHAO YIHANG
Sun aobo

Assignees

吉林大学

Dates

Publication Date: 20260505
Application Date: 20260207

Claims (7)

1. The 3D printing device for the corn stalk based composite material is characterized by comprising a large-sized stirrer (1), a small-sized stirrer (2), an upper helical gear motor (3), a lower helical gear reducer (4), an upper gate valve (5), a lower gate valve (6), a 3D printing spray head (7), a triaxial motion platform (8), a left bracket (9) and a right bracket (10); Left brackets (9) and right brackets (10) are respectively arranged at two sides of the bottom of the large-scale stirrer (1), and an internal stirring device (103) of the large-scale stirrer is arranged in the large-scale stirrer; The internal stirring device (103) of the large-scale stirrer comprises a circular rotating shaft (103 a), a vertical cutting blade I (103 b) and a vertical cutting blade II (103 c); The circular rotating shaft (103 a) is arranged at the lower part of the large-sized stirrer (1), and the lower end of the circular rotating shaft is connected with the output shaft of the upper helical gear motor (3) and is driven by the output shaft; The vertical cutting pieces I (103 b) and the vertical cutting pieces II (103 c) are parallel and symmetrically and vertically fixedly connected to the upper end of the circular rotating shaft (103 a); An upper discharge hole (104) at the bottom of the large-scale mixer (1) is fixedly connected with an upper gate valve (5) in a sealing way, and a liquid feed inlet (102) of the large-scale mixer is arranged at the upper part of the upper discharge hole; the lower end of the upper gate valve (5) is fixedly connected with a feeding port (201) of the small mixer at the top of the small mixer (2) in a sealing way; The lower end of a lower discharge hole (203) of the small mixer (2) is fixedly connected with a lower gate valve (6) in a sealing way, an internal mixing device (202) of the small mixer is arranged in the small mixer, and the small mixer is driven by a lower helical gear motor (4) at the bottom; the 3D printing spray head (7) is of a conical tip structure, the upper end of the 3D printing spray head is fixedly connected with the lower end of the lower gate valve (6) in a sealing mode, and a triaxial movement platform (8) is arranged below the 3D printing spray head.
2. The 3D printing device of a cornstalk-based composite material according to claim 1, wherein: The upper part of the large stirrer (1) is also provided with a fan-shaped top cover (105) and a large stirrer liquid feed inlet (102); The fan-shaped top cover (105) comprises a fan-shaped wafer (105 a), a vertical cylinder (105 b) and a cuboid handle (105 c) which are sequentially connected, and the fan-shaped wafer is installed opposite to a fan-shaped solid feed inlet at the upper end of the large-scale stirrer (1); the solid feed inlet is a fan-shaped opening at the upper end of the large-scale stirrer (1) and is used for adding corn stalk raw materials; the large mixer liquid feed inlet (102) consists of a top funnel (102 a) and a vertical transition pipe (102 b) for the addition of water.
3. The 3D printing device of a cornstalk-based composite material according to claim 2, wherein: the top of the small mixer (2) is also provided with an adhesive adding port (204); the internal stirring device (202) of the mini-mixer comprises a vertical cutting blade III (202 a), a vertical cutting blade IV (202 b) and an input shaft (202 c); the adhesive adding port (204) is provided with an annular funnel for adding the adhesive, wherein the adhesive is a starch plant adhesive or a cellulose adhesive with the concentration of 0.5-2% is added on the basis of using the starch adhesive, so that the stability of the slurry is further improved.
4. A 3D printing device of cornstalk-based composite material according to claim 3, characterized in that: The input shaft (202 c) is arranged at the bottom of the small mixer (2), and the lower end of the input shaft is connected with the output shaft of the lower helical gear motor (4) and driven by the output shaft; The vertical cutting sheets III (202 a) and IV (202 b) are parallel and symmetrically and vertically fixedly connected to the upper end of the input shaft (202 c).
5. The 3D printing device of a cornstalk-based composite material according to claim 4, wherein: The matrix of the vertical cutting piece is carbon steel, and the cutting edge is welded with a hard alloy blade.
6. The 3D printing device of a cornstalk-based composite material according to claim 5, wherein: The triaxial motion platform (8) is formed by sequentially overlapping an X-axis linear driving module, a Y-axis linear driving module and a Z-axis linear driving module, and drives the tail end platform to move along the X direction, the Y direction and the Z direction.
7. A using method of a 3D printing device of a corn stalk based composite material is characterized by comprising the following specific steps of: step one, primarily crushing and dissolving corn stalks Putting corn stalk raw materials into the large-scale mixer (1) through a solid feed inlet of the large-scale mixer (1), and covering a fan-shaped top cover (105); Then adding clear water into the large mixer (1) through a liquid feed inlet (102) of the large mixer; starting an upper helical gear motor (3), and starting a stirring device (103) in the large-scale stirrer to cut the corn stalk raw material and dissolve part of the corn stalk raw material in water to form an initial suspension of corn stalk powder; Step two, further crushing the corn stalk raw material and adding the adhesive After the corn stalk powder initial suspension is formed, an upper gate valve (5) is opened, so that the corn stalk powder initial suspension flows into a small-sized stirrer (2), and a lower helical gear speed reducing motor (4) is started, so that a stirring device (202) in the small-sized stirrer can further cut corn stalk powder; Then adding a certain amount of adhesive through an adhesive adding port (204) of the small-sized stirrer (2), and forming a coagulated slurry of corn stalk powder in the small-sized stirrer (2) after the adhesive is fully fused with the corn stalk powder suspension; Step three, implementation of 3D printing After the cornstalk powder slurry is formed, opening a lower gate valve (6) to enable the cornstalk powder slurry to flow into a 3D printing spray head (7); Subsequently, the 3D printing spray head (7) continuously extrudes the cornstalk powder slurry onto the tail end platform of the triaxial motion platform (8), and 3D printing is realized by controlling the movement of the tail end platform.

Description

3D printing device of corn stalk based composite material Technical Field The invention belongs to the technical field of 3D printing, and particularly relates to a 3D printing device using a corn stalk-based composite material. Background The conventional 3D printing process generally has the problem of high energy consumption, such as Fused Deposition Modeling (FDM) needs to heat a high polymer material to a molten state of 180-250 ℃, and selective laser melting/sintering (SLM/SLS) needs to realize high-temperature sintering of hundreds to thousands of degrees centigrade by means of laser, so that the energy consumption of the whole process is high. The traditional 3D printing material has obvious environmental and resource bottlenecks that petrochemical-based high polymer materials such as ABS and the like are difficult to biodegrade, waste is easy to form persistent plastic pollution, light-cured resin contains irritant chemical components and can release Volatile Organic Compounds (VOCs) in the printing process, and leftover materials generated by metal powder printing have complex recovery process and high energy consumption. In addition, the traditional 3D printing material also faces the double constraint of high cost and resource dependence, high polymer materials such as ABS, PLA and the like and photosensitive resin belong to petroleum-based chemical products, metal powder needs high-purity powder raw materials, and the supply of the materials is easily influenced by the endowment of resources such as petroleum, mineral products and the like and market fluctuation. Because the economic benefit of recycling the corn straw is low, the open-air burning of the straw frequently occurs to cause the compound atmospheric pollution, and the unordered burning behavior of the straw is suppressed by improving the comprehensive utilization benefit of the corn straw. Therefore, the invention provides the composite material 3D printing device using the corn straw as the base material, the device can realize the preparation and the supply of the corn straw powder slurry, and the 3D printing operation is carried out by using the corn straw powder slurry as the forming raw material, thereby being expected to obviously improve the economic benefit of the comprehensive utilization of the corn straw. Disclosure of Invention The invention aims to solve the problems of high cost, energy dependence, environmental pollution, high energy consumption processing, low comprehensive utilization benefit of corn stalks and the like of the traditional 3D printing material, and provides a 3D printing device of a corn stalk based composite material, which can utilize corn stalk slurry to carry out 3D printing forming. A3D printing device of a corn stalk based composite material comprises a large mixer 1, a small mixer 2, an upper helical gear motor 3, a lower helical gear reducer 4, an upper gate valve 5, a lower gate valve 6, a 3D printing spray head 7, a triaxial motion platform 8, a left bracket 9 and a right bracket 10; Left brackets 9 and right brackets 10 are respectively arranged on two sides of the bottom of the large-scale mixer 1, and an internal stirring device 103 of the large-scale mixer is arranged in the large-scale mixer; the internal stirring device 103 of the large-scale stirrer comprises a circular rotating shaft 103a, a vertical cutting blade I103b and a vertical cutting blade II103c; the circular rotating shaft 103a is arranged at the lower part of the large-scale mixer 1, and the lower end of the circular rotating shaft is connected with the output shaft of the upper helical gear motor 3 and is driven by the output shaft; The vertical cutting piece I103b and the vertical cutting piece II103c are parallel and symmetrically and vertically fixedly connected to the upper end of the circular rotating shaft 103 a; An upper discharge hole 104 at the bottom of the large-scale mixer 1 is fixedly connected with an upper gate valve 5 in a sealing way, and a liquid feed hole 102 of the large-scale mixer is arranged at the upper part of the upper discharge hole; the lower end of the upper gate valve 5 is fixedly connected with a feed inlet 201 of the small mixer at the top of the small mixer 2 in a sealing way; the lower end of a lower discharge hole 203 of the small mixer 2 is fixedly connected with a lower gate valve 6 in a sealing way, and an internal mixing device 202 of the small mixer is arranged in the small mixer and is driven by a lower helical gear motor 4 at the bottom; The 3D printing spray head 7 is of a conical tip structure, the upper end of the 3D printing spray head is fixedly connected with the lower end of the lower gate valve 6 in a sealing manner, and the triaxial moving platform 8 is placed below the 3D printing spray head. The upper part of the large mixer 1 is also provided with a fan-shaped top cover 105 and a large mixer liquid feed inlet 102; The fan-shaped top cover 105 comprises a fan-shaped w