CN110103313B - Pile aggregate flow slurry 3D printing concrete forming equipment and forming method - Google Patents
Pile aggregate flow slurry 3D printing concrete forming equipment and forming method Download PDFInfo
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- CN110103313B CN110103313B CN201910233689.5A CN201910233689A CN110103313B CN 110103313 B CN110103313 B CN 110103313B CN 201910233689 A CN201910233689 A CN 201910233689A CN 110103313 B CN110103313 B CN 110103313B
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- 239000004567 concrete Substances 0.000 title claims abstract description 65
- 238000010146 3D printing Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000002002 slurry Substances 0.000 title claims description 44
- 238000007639 printing Methods 0.000 claims abstract description 195
- 239000007921 spray Substances 0.000 claims abstract description 60
- 239000004568 cement Substances 0.000 claims abstract description 37
- 230000009974 thixotropic effect Effects 0.000 claims abstract description 24
- 238000007790 scraping Methods 0.000 claims abstract description 20
- 239000000835 fiber Substances 0.000 claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 8
- 239000010959 steel Substances 0.000 claims abstract description 8
- 239000002245 particle Substances 0.000 claims abstract description 5
- 238000010276 construction Methods 0.000 claims description 9
- 239000004575 stone Substances 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 7
- 239000002699 waste material Substances 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 239000000654 additive Substances 0.000 claims description 3
- 230000000996 additive effect Effects 0.000 claims description 3
- 238000005452 bending Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000011707 mineral Substances 0.000 claims description 3
- 229920005594 polymer fiber Polymers 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000004570 mortar (masonry) Substances 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract description 3
- 238000005034 decoration Methods 0.000 abstract description 2
- 238000000465 moulding Methods 0.000 abstract 2
- 238000005516 engineering process Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 210000000988 bone and bone Anatomy 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011440 grout Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000009435 building construction Methods 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/001—Rapid manufacturing of 3D objects by additive depositing, agglomerating or laminating of material
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- 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
- B33Y10/00—Processes of additive manufacturing
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Producing Shaped Articles From Materials (AREA)
Abstract
The equipment printing head comprises a printing hopper and a printing spray head which are arranged in parallel, wherein a feed inlet of the printing hopper is communicated with an aggregate feed system, and a feed inlet of the printing spray head is communicated with a feed system of quick-setting thixotropic cement paste; the printing hopper and the printing spray head are arranged front and back, and both of the printing hopper and the printing spray head advance along the same moving route; the middle is provided with a scraping plate for scraping the aggregate. When in printing, firstly, aggregate is laid, then quick setting thixotropic cement paste is spread at a constant speed according to a printing path, cement paste flows into gaps of the aggregate to be quickly set and hardened into a concrete whole, and the concrete is stacked layer by layer to form a product. The application has the advantages of simple molding process, high production efficiency and low production cost, solves the defects that the prior mortar 3D printing process has no large-particle aggregate, large cement consumption, large shrinkage and incapability of adding steel fibers, can be applied to printing of curved wall bodies, artistic models and decorations, and is a special 3D printing concrete molding process.
Description
Technical Field
The application relates to the technical field of 3D printing, in particular to pile aggregate flow pulp 3D printing concrete forming equipment and a forming method.
Background
At present, the 3D printing technology is rapidly popularized in the building field, and concrete is used as a building material with the largest consumption and the widest range on the building, and is a main material of the building 3D printing technology.
The building 3D printing technology is in line with the development of industrial revolution, and has the following advantages compared with the traditional construction process:
(1) The site construction time is reduced through constant construction rate, and the construction efficiency is improved;
(2) The template is not needed, so that the waste of the template can be reduced, the construction cost is reduced, and the sustainable construction of the building is improved;
(3) The building has strong customization performance due to no use of templates, any detail characteristics, complex curved surfaces, pipelines and the like can be printed out, and more complex design and aesthetic purposes are realized;
(4) Creating a working post based on a high-end technology; according to the computer design diagram, the whole process can be controlled by a computer program without manual intervention, which means that the risk of casualties in the building industry is greatly reduced, the labor force of personnel is greatly saved, and the cost of safety measures for building construction is reduced;
(5) Can reduce the pollution of building dust and noise, protect the environment and realize green environmental protection.
However, the printed concrete used in the current concrete 3D printing technology is a mortar material, no coarse aggregate of 2-25mm exists, and no steel fiber is added to solve the brittleness problem of plain concrete; in addition, the mortar material has high cement consumption, large volume shrinkage in the hydration process and easy cracking, so that the quality problem of the 3D printing building is caused.
Disclosure of Invention
In order to overcome the defects in the prior art, the application provides pile aggregate flow pulp 3D printing concrete forming equipment and a forming method, and the pile aggregate is uniformly filled by quick-setting thixotropic cement paste, so that the quality of a 3D printing concrete finished product is ensured, and the standard requirement is met.
In order to achieve the technical purpose, the application adopts the following technical scheme:
pile aggregate head thick liquid 3D prints concrete forming equipment, including feed system, moving mechanism, print head and control system, its characterized in that: the printing head comprises a printing hopper and a printing spray head which are vertically arranged in parallel, wherein a feed inlet of the printing hopper is communicated with a feed system of aggregate, and a feed inlet of the printing spray head is communicated with a feed system of quick-setting thixotropic cement paste; the printing hopper is arranged in front of the printing advancing direction, the printing spray head is arranged behind the printing advancing direction, and the printing spray head advance along the same moving route; a scraping plate is arranged between the printing hopper and the printing spray head, so that aggregates on the printing surface of the printing hopper are scraped; the printing surface width of the printing hopper is larger than that of the printing nozzle, and the center lines of the printing surfaces are mutually overlapped.
According to the preferred technical scheme, the printing hopper and the printing spray head are movably connected through the rotating device, the rotating device is sleeved on the neck of the printing hopper, the outer side wall of the rotating device is fixedly connected with the printing spray head through the connecting rod, the relative positions of the printing hopper and the printing spray head in a straight printing section are kept unchanged, and the relative positions of the printing hopper and the printing spray head in a bending position are adjusted through the rotating device, so that the printing hopper and the printing spray head can move along the same moving route.
Further, a conveying spiral blade is arranged in the printing hopper; the printing spray head is provided with a spray head flow control valve.
Further, the scraping plate is fixed on the printing spray head through a connecting rod; the scraping plate is a hard plastic plate or a metal plate and is vertically arranged; the connecting rod is a V-shaped rod or a combination of the V-shaped rod and a straight rod, the middle tip end of the V-shaped rod is fixed on a slurry conveying pipe of the printing spray head or in the middle of the straight rod, two ends of the V-shaped rod are respectively fixed on two sides of the upper edge of the scraping plate, one end of the straight rod is fixed with the outer side wall of the rotating device, and the other end of the straight rod is fixed with the outer side wall of the printing spray head.
Further, the whole printing nozzle is broom-shaped and comprises a slurry conveying pipe at the top and a slurry pressing part with a trapezoid and flat bottom, and the bottom of the slurry pressing part is a slurry outlet; the periphery of the slurry outlet is uniformly provided with a circle of auxiliary slurry-homogenizing strips.
Further, the distance between the printing hopper and the printing spray head is 50-200 mm in a static state; the rotating device is formed by combining a gear and a bearing, and keeps the moving line of the printing spray head and the moving line of the printing hopper consistent through manual or belt transmission rotation
In addition, the application also provides a pile aggregate flow pulp 3D printing concrete forming method by using the pile aggregate flow pulp 3D printing concrete forming equipment, which is characterized by comprising the following steps of:
step one, preparing pile aggregate slurry 3D printing concrete forming equipment, aggregate and quick setting thixotropic cement slurry;
setting a printing route according to the requirement, and inputting the printing route into a control system of the pile aggregate flow 3D printing concrete forming equipment;
step three, feeding the quick setting thixotropic cement paste into a feeding system communicated with a printing spray head, and feeding aggregate into the feeding system communicated with a printing hopper;
step four, starting pile aggregate flow slurry 3D printing concrete forming equipment to print a first layer, wherein the concrete steps are as follows:
s1, stone aggregate enters a printing hopper, is conveyed through a conveying spiral blade, is extruded from a printing mouth, and is distributed according to a set printing route;
s2, the scraping plate closely follows the printing hopper, and aggregates distributed by the printing hopper are leveled;
s3, spraying prepared quick-setting thixotropic cement paste on the leveled aggregate by the printing spray head, enabling the quick-setting thixotropic cement paste to flow into gaps of the aggregate under the action of gravity and be set, and forming a concrete core by the set aggregate and the cement paste;
step five, after finishing printing the first layer according to the designed route, starting printing the second layer of concrete, and specifically performing according to the steps one to four until finishing printing the layer;
and step six, after finishing the printing work of the wall body or the model set by the printer, removing aggregates on two sides of the hardened concrete core, and obtaining a final printed concrete finished product.
The aggregate in the first step is crushed stone, pebble, ceramsite lightweight aggregate, industrial tailing crushed aggregate or aggregate prepared from construction waste, and the particle size is 5-25mm.
In addition, the aggregate in the first step can be mixed with steel fibers or polymer fibers, and the steel fiber toughened printed concrete product is formed by printing.
Finally, the quick setting thixotropic cement paste in the first step is preferably slurry with quick setting property prepared by mixing and stirring cement, mineral admixture, additive and water.
Compared with the prior art, the application has the technical advantages that:
1. the pile aggregate flow pulp 3D printing concrete forming equipment is simple in structure and novel in design, is improved on the basis of the existing 3D printing equipment, is divided into a printing hopper and a printing spray head, wherein a feed inlet of the printing hopper is communicated with an aggregate feed system, a feed inlet of the printing spray head is communicated with a feed system of quick-setting thixotropic cement paste, cement paste is uniformly sprayed on a leveling bone material surface according to a certain width by the cement paste printing head, has the characteristic of adjustable flow, and the printing hopper and the printing spray head are arranged front and back and move along the same moving route; the middle of the three-dimensional printing device is provided with the scraping plate to scrape the aggregate, so that the problem that the printing head of the existing 3D printing device is of a comprehensive integrated structure and has poor flexibility and pertinence is solved;
2. the pile aggregate flow slurry 3D printing concrete forming method has the advantages of simple forming process, high production efficiency and low production cost, can solve the defects of no large-particle aggregate, large cement consumption, large shrinkage, incapability of adding steel fibers and the like in the existing mortar 3D printing process, and can be applied to printing and manufacturing curved wall bodies, artistic modeling, municipal parts, decorative small parts and the like.
Drawings
The foregoing and/or other aspects and advantages of the present application will become more apparent and more readily appreciated from the detailed description taken in conjunction with the following drawings, which are meant to be illustrative only and not limiting of the application, wherein:
fig. 1 is a schematic structural view of a print head of a pile-aggregate-flow 3D printing concrete forming apparatus of the first embodiment;
FIG. 2 is a front view of FIG. 1;
fig. 3 is a schematic diagram of the overall structure of a printhead of a stacking aggregate flow 3D printing concrete forming apparatus according to the second embodiment;
FIG. 4 is a schematic layer-by-layer printing of a pile aggregate head-up 3D printed concrete forming method according to the present application;
FIG. 5 is a schematic view of a stacking aggregate flow 3D printed concrete forming method according to the present application after n layers are printed;
fig. 6 is a schematic diagram of the final printed product after removing the aggregates on both sides after printing is completed.
Reference numerals: 1-printing hopper, 2-conveying spiral blade, 3-aggregate, 4-printing spray head, 4.1-slurry conveying pipe, 4.2-slurry pressing part, 4.3-slurry outlet, 5-quick setting thixotropic cement slurry, 6-connecting rod, 7-scraping plate, 8-concrete core, 9-two side aggregate and 10-rotating device.
Detailed Description
Hereinafter, embodiments of a pile-aggregate-flow 3D-printing concrete forming apparatus and forming method of the present application will be described with reference to the accompanying drawings.
The examples described herein are specific embodiments of the present application, which are intended to illustrate the inventive concept, are intended to be illustrative and exemplary, and should not be construed as limiting the application to the embodiments and scope of the application. In addition to the embodiments described herein, those skilled in the art can adopt other obvious solutions based on the disclosure of the claims and specification, including those adopting any obvious substitutions and modifications to the embodiments described herein.
The drawings in the present specification are schematic views, which assist in explaining the concept of the present application, and schematically show the shapes of the respective parts and their interrelationships. Note that, in order to clearly show the structures of the components of the embodiments of the present application, the drawings are not drawn to the same scale. Like reference numerals are used to denote like parts.
The principles and features of the present application are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the application and are not to be construed as limiting the scope of the application. Fig. 1 and fig. 2 show an embodiment of the present application, which is a pile aggregate flow slurry 3D printing concrete forming device, comprising a feeding system, a moving mechanism, a printing head and a control system, wherein the printing head comprises a printing hopper 1 and a printing nozzle 4 which are vertically arranged in parallel, and a conveying spiral blade 2 is arranged in the printing hopper 1; the printing spray head 4 is provided with a spray head flow control valve, which is not shown in the drawing and is directly controlled by the rear-end slurry conveyor, the feed inlet of the printing hopper 1 is communicated with the feed system of the aggregate 3, and the feed inlet of the printing spray head 4 is communicated with the feed system of the quick-setting thixotropic cement slurry 5; the printing hopper 1 is arranged in front of the printing advancing direction, the printing spray head 4 is arranged behind the printing advancing direction, and the printing spray head advance along the same moving route; a scraping plate 7 is arranged between the printing hopper 1 and the printing spray head 4, aggregates on the printing surface of the printing hopper 1 are scraped, and the scraping plate 7 is preferably fixed on the printing spray head 4 through a connecting rod 6; the scraping plate 7 is a hard plastic plate or a metal plate and is vertically arranged; the connecting rod 6 is a V-shaped rod, the tip end of the connecting rod is fixed on the slurry conveying pipe 4.1 of the printing nozzle 4, and the two ends of the connecting rod are respectively fixed on the two sides of the upper edge of the scraping plate 7. The printing surface width of the printing hopper 1 is larger than that of the printing nozzle 4, and the center lines of the printing surfaces are mutually overlapped. The whole printing spray head 4 is preferably broom-shaped and comprises a slurry conveying pipe 4.1 at the top and a slurry pressing part 4.2 with a trapezoid and flat bottom, wherein the bottom of the slurry pressing part 4.2 is a slurry outlet 4.3; the periphery of the slurry outlet 4.3 is uniformly provided with a circle of auxiliary slurry-homogenizing strips; the width of the grout outlet 4.3 is not larger than the width of the designed wall or path line according to the designed printing width and the grout outlet with different width, and the distance between the printing hopper 1 and the printing spray head 4 is 50-200 mm in the static state.
As shown in fig. 3, in the second embodiment of the present application, the difference from the first embodiment is that the printing hopper 1 and the printing nozzle 4 are movably connected through a rotating device 10, the rotating device 10 is sleeved on the neck of the printing hopper 1, the outer side wall of the rotating device is fixedly connected with the printing nozzle 4 through a connecting rod 6, so that the relative positions of the printing hopper 1 and the printing nozzle 4 in a straight printing section are kept unchanged, and the relative positions of the printing hopper 1 and the printing nozzle 4 in a bending position are adjusted through the rotating device 10, so that the printing hopper and the printing nozzle can move along the same moving route. The rotating device 10 is formed by combining gears and bearings, and keeps the moving line of the printing spray head and the printing hopper consistent through manual or belt transmission rotation. The connecting rod 6 is a combination of a V-shaped rod and a straight rod, the middle tip end of the V-shaped rod is fixed in the middle of the straight rod, the two ends of the V-shaped rod are respectively fixed on two sides of the upper edge of the scraping plate 7, one end of the straight rod is fixed with the outer side wall of the rotating device 10, and the other end of the straight rod is fixed with the outer side wall of the printing nozzle 4.
As shown in fig. 4-6, the pile aggregate flow pulp 3D printing concrete forming method by using the pile aggregate flow pulp 3D printing concrete forming equipment comprises the following steps:
step one, preparing pile aggregate slurry 3D printing concrete forming equipment, aggregate and quick setting thixotropic cement slurry;
setting a printing route according to the requirement, and inputting the printing route into a control system of the pile aggregate flow 3D printing concrete forming equipment;
step three, feeding the quick setting thixotropic cement paste 5 into a feeding system communicated with the printing spray head 4, and feeding the aggregate 3 into a feeding system communicated with the printing hopper 1;
step four, starting pile aggregate flow slurry 3D printing concrete forming equipment to print a first layer, wherein the concrete steps are as follows:
s1, stone aggregate enters a printing hopper 1, is conveyed through a conveying spiral blade 2, is extruded from a printing mouth to form aggregate 3, and is subjected to aggregate distribution according to a set printing route;
s2, the scraping plate 7 closely follows the printing hopper 1, and aggregates distributed by the printing hopper 1 are leveled;
s3, spraying the prepared quick-setting thixotropic cement paste 5 on the leveled aggregate by the printing spray head 4, enabling the quick-setting thixotropic cement paste 5 to flow into gaps of the aggregate under the action of gravity and be set, and forming a concrete core 8 by the set aggregate and the cement paste; the printing spray head 4 uniformly sprays the quick-setting thixotropic cement paste on the leveling bone material surface according to a certain width, and has the characteristic of adjustable flow;
step five, after finishing printing the first layer according to the designed route, starting printing the second layer of concrete, and specifically performing according to the steps one to four until finishing printing the layer;
and step six, after finishing the printing work of the wall body or the model set by the printer, removing the aggregates 9 on the two sides of the hardened concrete core 8 to obtain a final printed concrete finished product.
Wherein the aggregate 3 comprises broken stone, pebble, ceramsite lightweight aggregate, industrial tailing broken aggregate and aggregate made of construction waste, is not limited to the above aggregate, has the particle size of 5-25mm, can be mixed with fibers such as steel fibers and polymer fibers, and can be distributed by a printing hopper 1, and finally the steel fiber toughened printed concrete can be formed. The quick setting thixotropic cement slurry 5 is slurry with quick setting property prepared by stirring cement, mineral admixture, additive and water.
Further, after the model is printed layer by layer according to the set layer number of the 3D printer, the sprayed cement paste and the aggregate are hardened and combined together to have certain strength, and then the redundant aggregate is removed and a printed model finished product is finished.
A pile aggregate flow slurry 3D printing concrete forming method has the final printing effect shown in figure 6, after printing an nth layer and finishing the printing work of a wall body or a design model set by a printer, removing stone aggregates on two sides of hardened printing concrete, leaving a hardened concrete core part to obtain a final printing concrete finished product, wherein the outer vertical surface of the finished product has a certain natural decoration effect due to exposed stone surfaces and non-flatness after selecting the aggregates with characteristics.
The present application is not limited to the above embodiments, and any person can obtain other products in various forms under the teaching of the present application, however, any changes in shape or structure of the products are included in the scope of protection of the present application, and all the products having the same or similar technical solutions to the present application are included in the present application.
Claims (8)
1. Pile aggregate head thick liquid 3D prints concrete forming equipment, including feed system, moving mechanism, print head and control system, its characterized in that: the printing head comprises a printing hopper (1) and a printing spray head (4) which are vertically arranged in parallel, wherein a feed inlet of the printing hopper (1) is communicated with a feed system of aggregate (3), and a feed inlet of the printing spray head (4) is communicated with a feed system of quick-setting thixotropic cement paste (5); the printing hopper (1) is arranged in front of the printing advancing direction, the printing spray head (4) is arranged behind the printing advancing direction, and the printing spray head advance along the same moving route; a scraping plate (7) is arranged between the printing hopper (1) and the printing spray head (4) to scrape aggregate on the printing surface of the printing hopper (1); the printing surface width of the printing hopper (1) is larger than the printing surface width of the printing spray head (4), and the center lines of the printing surfaces are mutually overlapped; the printing hopper (1) and the printing spray head (4) are movably connected through a rotating device (10); the printing spray head (4) is broom-shaped as a whole and comprises a slurry conveying pipe (4.1) at the top and a slurry pressing part (4.2) with a trapezoid and flat bottom, and the bottom of the slurry pressing part (4.2) is a slurry outlet (4.3); a circle of auxiliary homogenate strips are uniformly arranged around the pulp outlet (4.3); the scraping plate (7) is fixed on the printing nozzle (4) through a connecting rod (6);
the rotary device (10) is sleeved on the neck of the printing hopper (1), the outer side wall of the rotary device is fixedly connected with the printing spray head (4) through the connecting rod (6), the relative position of the printing hopper (1) and the printing spray head (4) at the flat printing section is kept unchanged, and the relative position of the printing hopper and the printing spray head at the bending position is adjusted through the rotary device (10), so that the printing hopper and the printing spray head can advance along the same moving route.
2. The aggregate stacking slurry 3D printing concrete forming apparatus of claim 1, wherein: a conveying spiral blade (2) is arranged in the printing hopper (1); the printing spray head (4) is provided with a spray head flow control valve.
3. The aggregate stacking slurry 3D printing concrete forming apparatus of claim 1, wherein: the scraping plate (7) is a hard plastic plate or a metal plate and is vertically arranged; the connecting rod (6) is a V-shaped rod or a combination of the V-shaped rod and a straight rod, the middle tip end of the V-shaped rod is fixed on a slurry conveying pipe (4.1) of the printing spray head (4) or the middle of the straight rod, two ends of the V-shaped rod are respectively fixed on two sides of the upper edge of the scraping plate (7), one end of the straight rod is fixed with the outer side wall of the rotating device (10), and the other end of the straight rod is fixed with the outer side wall of the printing spray head (4).
4. The aggregate stacking slurry 3D printing concrete forming apparatus of claim 2, wherein: the distance between the printing hopper (1) and the printing spray head (4) is 50-200 mm in a standing state; the rotating device (10) is formed by combining a gear and a bearing, and keeps the moving line of the printing nozzle and the moving line of the printing hopper consistent through manual or belt transmission rotation.
5. A method of forming a pile-aggregate-flow 3D-printed concrete using the pile-aggregate-flow 3D-printed concrete forming apparatus according to any one of claims 1 to 4, comprising the steps of:
step one, preparing pile aggregate slurry 3D printing concrete forming equipment, aggregate and quick setting thixotropic cement slurry;
setting a printing route according to the requirement, and inputting the printing route into a control system of the pile aggregate flow 3D printing concrete forming equipment;
step three, feeding the quick setting thixotropic cement paste (5) into a feeding system communicated with a printing spray head (4), and feeding the aggregate (3) into a feeding system communicated with a printing hopper (1);
step four, starting pile aggregate flow slurry 3D printing concrete forming equipment to print a first layer, wherein the concrete steps are as follows:
s1, stone aggregate enters a printing hopper (1), is conveyed by a conveying spiral blade (2), is extruded from a printing mouth to form aggregate (3), and is distributed according to a set printing route;
s2, a scraping plate (7) closely follows the printing hopper (1) to level aggregate distributed by the printing hopper (1);
s3, spraying prepared quick-setting thixotropic cement paste (5) on the leveled aggregate by the printing spray head (4), enabling the quick-setting thixotropic cement paste (5) to flow into gaps of the aggregate under the action of gravity and be solidified, and forming a concrete core (8) by the solidified aggregate and the cement paste;
step five, after finishing printing the first layer according to the designed route, starting printing the second layer of concrete, and specifically performing according to the steps one to four until finishing printing the layer;
and step six, after finishing the printing work of the wall body or the model set by the printer, removing the aggregates (9) on the two sides of the hardened concrete core (8) to obtain a final printed concrete finished product.
6. The method for forming pile-aggregate-flow 3D printed concrete according to claim 5, wherein the aggregate in the first step is crushed stone, pebble, ceramsite lightweight aggregate, industrial tailing crushed aggregate or aggregate made of construction waste, and the particle size is 5-25mm.
7. The method for forming pile-aggregate-flow 3D printed concrete according to claim 5, wherein in the first step, steel fibers or polymer fibers are mixed into the aggregate (3).
8. The method for forming pile-aggregate-flow 3D printed concrete according to claim 5, wherein the quick-setting thixotropic cement paste (5) in the first step is a slurry with quick setting property prepared by mixing and stirring cement, mineral admixture, additive and water.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910233689.5A CN110103313B (en) | 2019-03-26 | 2019-03-26 | Pile aggregate flow slurry 3D printing concrete forming equipment and forming method |
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| CN201910233689.5A CN110103313B (en) | 2019-03-26 | 2019-03-26 | Pile aggregate flow slurry 3D printing concrete forming equipment and forming method |
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| CN110103313A CN110103313A (en) | 2019-08-09 |
| CN110103313B true CN110103313B (en) | 2023-11-10 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112536884B (en) * | 2020-11-17 | 2022-04-12 | 深圳大学 | Coarse aggregate planting and burying device and 3D printer |
| CN113021562B (en) * | 2021-04-16 | 2022-05-27 | 北京工业大学 | Piezoelectric aggregate automation buries device underground based on cement base 3D prints |
| CN113844029B (en) * | 2021-10-12 | 2023-08-18 | 杭州冠力智能科技有限公司 | Print shower nozzle rotation type 3D printing device |
| CN115383865A (en) * | 2022-09-19 | 2022-11-25 | 中国建筑第八工程局有限公司 | 3D printing device and method for common concrete |
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| CN103967276A (en) * | 2014-04-29 | 2014-08-06 | 同济大学 | Architectural engineering construction device based on 3D printing technology and application method |
| KR20160068565A (en) * | 2014-12-05 | 2016-06-15 | 주식회사 포스코 | Three-dimension printing device |
| CN105625720A (en) * | 2016-01-05 | 2016-06-01 | 江苏敦超电子科技有限公司 | Multi-material building three-dimensional printing and molding method |
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| CN108002753A (en) * | 2017-11-01 | 2018-05-08 | 安徽海龙建筑工业有限公司 | A kind of prepacked aggregate architectural concrete stair and preparation method thereof |
| CN107901185A (en) * | 2017-11-02 | 2018-04-13 | 中国建筑股份有限公司 | The method and its application on 3D printing concrete wall surface |
| CN108000675A (en) * | 2017-11-30 | 2018-05-08 | 西安理工大学 | A kind of 3D printing method of skeleton growth formula concrete component |
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