3D printing device and 3D printing system

Abstract

The application discloses a 3D printing device and a 3D printing system, the 3D printing device comprises a base, a temperature control assembly and a printing assembly, the base is provided with a printing pool, a gelatin solution is placed in the printing pool, the temperature control assembly is used for controlling the temperature of the gelatin solution, the printing assembly comprises a driving mechanism and a printing head, the driving mechanism has a fixed end and an output end, the fixed end is fixed to the base, the printing head is connected to the output end, and the printing head is used for being inserted into the printing pool under the driving of the driving mechanism to perform a printing work. In the application, the 3D printing device does not need to additionally design a support structure, the design process and the printing program are simplified, and the finished product of the 3D printing is more easily demoulded.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building 3D printing, and particularly relates to a 3D printing device and a 3D printing system using the same. BACKGROUND

[0002] The 3D printing technology in the building industry is a rapid prototyping technology based on three-dimensional data of a building manufacturing object model, and extruding concrete (mortar) according to a predetermined printing path to print layer by layer to increase materials to generate a three-dimensional entity, and is also called "additive manufacturing technology".

[0003] One existing 3D printing method is to independently design and print a support structure to support a spatial structure to be printed, but this method needs to design a self-supporting structure additionally, which causes waste of printing materials and increases the complexity of setting the printing path of the extrusion head; at the same time, the subsequent demolding step is also relatively inconvenient.

[0004] Another 3D printing method is to split the digital model of the spatial structure to be printed, to print in sections and then assemble, but this method needs to arrange an external support mold in advance before printing, which will cause waste of the mold and the problem of demolding after the subsequent material solidification, and also cause errors in the subsequent assembly process. SUMMARY

[0005] The main purpose of the present application is to provide a 3D printing device and a 3D printing system, which does not need to design a support structure additionally, simplifies the design process and the printing program, and makes the finished product of 3D printing easier to demold.

[0006] To achieve the above purpose, the present application provides a 3D printing device, which comprises:

[0007] a base, which is provided with a printing pool, and a gelatin solution is placed in the printing pool;

[0008] a temperature control assembly, which is used to control the temperature of the gelatin solution; and

[0009] a printing assembly, which comprises a driving mechanism and a printing head, the driving mechanism has a fixed end and an output end, the fixed end is fixed to the base, and the printing head is connected to the output end and is used to extend into the printing pool under the driving of the driving mechanism to perform printing work.

[0010] In an embodiment, the temperature control assembly is formed with a heating space, and the heating space is arranged around the printing pool.

[0011] In an embodiment, the temperature control assembly comprises a temperature control box, which is arranged on the base and surrounds the printing pool, and a heating space is formed between the inner wall of the temperature control box and the outer wall of the printing pool.

[0012] The temperature control assembly further comprises a heater for heating air in the heating space.

[0013] In an embodiment, the heater is a hot air blower, which is in communication with the heating space.

[0014] The hot air blower is used to blow hot air into the heating space to control the temperature of the gelatin solution.

[0015] In an embodiment, the temperature control assembly comprises a plurality of electric heating sheets, which are attached to the outer wall of the printing pool and surround the printing pool to form the heating space.

[0016] In an embodiment, the 3D printing device further comprises a gelatin supply assembly arranged on the base, which is used to store gelatin particles, and has a discharge end in communication with the printing pool to provide gelatin particles for the printing pool.

[0017] In an embodiment, the gelatin supply assembly comprises:

[0018] a gelatin storage tank, which has a receiving cavity for storing gelatin particles; and

[0019] a gelatin supply circuit, one end of which is in communication with the receiving cavity, and the other end forms the discharge end.

[0020] In an embodiment, the printing assembly further comprises a feeding module, which comprises a storage tank and a screw extrusion pump, the 3D printing device is used to perform 3D printing by using concrete, the storage tank is used to store concrete, one end of the screw extrusion pump is in communication with the storage tank, and the other end is in communication with the printing head, and the screw extrusion pump is used to extrude the concrete into the printing head.

[0021] In an embodiment, the storage tank is provided with a stirrer, which comprises a driving member and a plurality of stirring blades, the driving member is arranged at the bottom of the storage tank, the plurality of stirring blades are connected to the output end of the driving member and located in the inner cavity of the storage tank, and the stirring blades are used to stir the concrete in the storage tank.

[0022] The application further provides a 3D printing system, which comprises:

[0023] a control device; and

[0024] The 3D printing device is electrically connected to the control device.

[0025] The 3D printing device comprises a base, a temperature control assembly and a printing assembly, the base is used for supporting and mounting the temperature control assembly and the printing assembly, the base is provided with a printing pool, a gelatin solution is placed in the printing pool, and the gelatin solution is used for providing a supporting environment for 3D printing; the temperature control assembly can control the temperature of the gelatin solution; the gelatin solution presents a solid state or a liquid state at different temperatures; the printing assembly comprises a driving mechanism and a printing head connected with each other, the driving mechanism has a fixed end fixed on the base and an output end used for connecting the printing head; and when the gelatin solution solidifies, the driving mechanism is used for driving the printing head to extend into the printing pool to perform 3D printing. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only show some of the embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of the drawings shown.

[0027] Figure 1 It is a structural schematic diagram of the 3D printing device in an embodiment of the present application.

[0028] Explanation of reference numerals:

[0029] Reference Name Reference Name 100 3D printing device 22 Heater 1 Abutment 3 Printing assembly 11 Printing pool 31 Driving mechanism 2 Temperature control assembly 311 Fixed end 21 Temperature control box 312 Output end 211 Heating space 32 Printing head

[0030] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present application.

[0032] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0033] Meanwhile, the meaning of "and / or" or "and / or" appearing in the full text is that three schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B are satisfied at the same time.

[0034] In addition, the description such as "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the protection scope required by the present application.

[0035] The present application provides a kind of 3D printing device 100, the 3D printing device 100 includes base 1, temperature control component 2 and printing component 3, base 1 is equipped with printing pool 11, gelatin solution is placed in printing pool 11, temperature control component 2 is used to control the temperature of gelatin solution, printing component 3 includes drive mechanism 31 and print head 32, drive mechanism 31 has fixed end 311 and output end 312, fixed end 311 is fixed to base 1, print head 32 is connected to output end 312, for entering printing pool 11 under the drive of drive mechanism 31, to carry out printing work.

[0036] In the embodiment, the 3D printing device 100 is realized based on gelatin solution or gelatin gel, specifically, when the concentration of gelatin aqueous solution is 10% to 15%, the gelatin solution is liquid above 40 degrees Celsius, below 40 degrees Celsius, with the temperature decreases, the flowability gradually reduces, the viscosity gradually increases, and gradually solidifies into gelatin gel, gelatin gel is similar to solid substance, can maintain certain shape, and has elasticity, the gelatin at this time can be used as support structure, support 3D printing device 100 in gelatin gel carries out 3D printing operation, and the final 3D printing spatial structure is also in gelatin gel.

[0037] In the embodiment, the 3D printing device 100 comprises a base 1, a temperature control assembly 2 and a printing assembly 3. The base 1 can be a rack, a mounting rack or a support, etc. The base 1 is used to mount and support the temperature control assembly 2 and the printing assembly 3. A printing pool 11 for containing gelatin solution is arranged on the base 1. It can be understood that the printing pool 11 contains gelatin solution which is prepared by gelatin particles or gelatin powder and water, and the concentration is usually 10% to 15%. Meanwhile, the printing pool 11 is also the working area for 3D printing. The gelatin solution in the printing pool 11 gradually changes from aqueous solution to gelatin gel solid after the temperature changes, so that the printing assembly 3 can perform 3D printing work in the gelatin gel. At this time, the gelatin gel is a natural support structure with high support strength, which can fully and stably support the spatial structure to be printed, especially the structure with spatial curve or complex shape.

[0038] After the 3D printing work is completed, the temperature of the gelatin gel is changed again to change the gelatin gel from gelatin solid to gelatin aqueous solution. The printed structure is separated from the gelatin gel, and the separated gelatin aqueous solution does not adhere to the printed structure, which facilitates the demolding of the printed structure and effectively improves the printing efficiency. The separated gelatin aqueous solution can be recycled for use in the next printing process, thereby improving the material recycling rate.

[0039] It can be understood that the temperature control assembly 2 is used to control the temperature of the gelatin solution. The temperature control assembly 2 can not only increase the temperature to gradually change the gelatin gel from solid to gelatin solution with strong fluidity, but also can decrease the temperature to gradually change the gelatin solution from liquid to gelatin gel with weak fluidity and strong viscosity, until the temperature is decreased to a certain temperature, so that the gelatin gel has strong support strength to support the structure to be printed.

[0040] In the embodiment, the printing assembly 3 is used to perform 3D printing work in the gelatin gel of the printing pool 11. The printing assembly 3 comprises a driving mechanism 31 and a printing head 32. The driving mechanism 31 drives the printing head 32 to move along a predetermined route. The driving mechanism 31 has a fixed end 311 fixed to the base 1 and an output end 312 for outputting power. The output end 312 is connected to the printing head 32.

[0041] It can be understood that the printing head 32 can be extended into the printing pool 11 and perform 3D printing work in the gelatin gel under the driving of the driving mechanism 31. The driving mechanism 31 can be a mechanical arm, a pneumatic cylinder or a stepping motor, etc. Preferably, the driving mechanism 31 is a five-axis mechanical arm or a six-axis mechanical arm, so that the printing head 32 can have more abundant movement paths and can print more complex structures. The printing head 32 moves along the predetermined movement path under the driving of the driving mechanism 31, and finally completes the designed spatial structure.

[0042] In another embodiment of the present application, the printing head 32 has a hollow cavity for conveying concrete for 3D printing, and a variable diameter portion is arranged in the hollow cavity, which can change the diameter of a part of the hollow cavity; since 3D printing is performed in a gelatin gel with certain strength and resistance, the printing assembly 3 also needs to have a high pressure when conveying concrete, and the arrangement of the variable diameter portion can improve the flow rate of the concrete through the printing head 32, thereby improving the penetration of the concrete in the gelatin gel and effectively improving the printing effect.

[0043] The 3D printing device 100 of the present application comprises a base 1, a temperature control assembly 2, and a printing assembly 3, the base 1 is used to support and install the temperature control assembly 2 and the printing assembly 3, and the base 1 is provided with a printing pool 11, the printing pool 11 is placed with a gelatin solution, which is used to provide a supporting environment for 3D printing; the temperature control assembly 2 can control the temperature of the gelatin solution; so that the gelatin solution presents solid or liquid state at different temperatures; the printing assembly 3 comprises a driving mechanism 31 and a printing head 32 connected with each other, the driving mechanism 31 has a fixed end 311 fixed on the base 1 and an output end 312 used to connect the printing head 32; and when the gelatin solution solidifies, the driving mechanism 31 is used to drive the printing head 32 to extend into the printing pool 11 to perform 3D printing.

[0044] In an embodiment, the temperature control assembly 2 is formed with a heating space 211, which is arranged around the printing pool 11.

[0045] It can be understood that the heating space 211 is used to change the temperature of the gelatin solution in the printing pool 11, which can be arranged around the printing pool 11 at intervals, can be attached around the printing pool 11, or can be arranged in the printing pool 11, which is not limited here; and the heating space 211 is not limited to heating the gelatin solution in the printing pool 11, but can also reduce the temperature of the gelatin solution in the printing pool 11 to make it change into more viscous gelatin gel; the arrangement of the heating space 211 can more comprehensively cover the printing pool 11, so that the temperature change of the gelatin solution in the printing pool 11 is more uniform.

[0046] And since the state change between the gelatin solution and the gelatin gel is relatively slow, the temperature change needs to be faster, and the heating space 211 in the present application can control the temperature change around or inside the printing pool 11 as a whole, improve the efficiency and speed of temperature change, and thereby improve the speed of state change of the gelatin solution and the gelatin gel.

[0047] In an embodiment, the temperature control assembly 2 comprises a temperature control box 21, which is arranged on the base 1 and surrounds the printing pool 11, and a heating space 211 is formed between the inner wall of the temperature control box 21 and the outer wall of the printing pool 11; the temperature control assembly 2 further comprises a heater 22, which is used to heat the air in the heating space 211.

[0048] In the embodiment, the temperature control assembly 2 comprises the temperature control box 21 and the heater 22 connected with the temperature control box 21, the temperature control box 21 is arranged on the base 1, and a heating space 211 is formed between the inner wall of the temperature control box 21 and the outer wall of the printing pool 11, and the heater 22 is used to heat the air or other medium in the heating space 211 to heat the printing pool 11. It can be understood that the temperature control assembly 2 not only has a heating function, but also is provided with a refrigerator, which is used to rapidly cool the air in the heating space 211, so as to cool the gelatin solution in the printing pool 11, so that the gelatin solution can be rapidly changed into gelatin gel, and the subsequent printing assembly 3 can perform 3D printing operation in the gelatin gel. The refrigerator can be a fan, which blows flowing air into the heating space 211 to take away the heat of the gelatin solution to achieve refrigeration. Preferably, the refrigerator can also be able to produce air with lower temperature and fluidity, such as an air conditioner. The refrigerator comprises a compressor, an evaporator and a condenser. The compressor can compress the refrigerant into a liquid, which is then sent into the heating space 211. At this time, the hot air in the heating space 211 contacts the evaporator, and the liquid refrigerant is heated to become gaseous, taking away the heat of the heating space 211. The gaseous refrigerant is rapidly cooled to the outside under the blowing of the fan and the change of pressure, so as to rapidly reduce the temperature of the gelatin solution to rapidly form the gelatin gel and start 3D printing.

[0049] In another embodiment of the present application, the temperature control assembly 2 further comprises a temperature sensor, which is electrically connected with the heater 22 or the refrigerator. The temperature sensor is used to monitor the temperature of the heating space 211 in real time and control the heater 22 or the refrigerator to work, so as to accurately control the temperature of the gelatin solution or the gelatin gel in the printing pool 11, and make the gelatin gel reach a better support strength under the accurate temperature control. The accurate temperature control can also make the gelatin solution completely separate from the 3D model.

[0050] In an embodiment, the heater 22 is a hot air blower, which communicates with the heating space 211. The hot air blower is used to blow hot air into the heating space 211 to control the temperature of the gelatin solution.

[0051] It can be understood that the heater 22 is a hot air generator, the hot air generator has an air outlet, the air outlet is communicated with the heating space 211, the hot air generator can generate hot air with heat and fast flow speed, and the hot air or hot air is blown into the heating space 211 through the air outlet to control the temperature of the gelatin solution; specifically, when the printing pool 11 and the gelatin gel in the printing pool 11 are heated to form the gelatin gel, the hot air generator works to generate hot air, the hot air fills the heating space 211, so that the printing pool 11 and the gelatin gel in the printing pool 11 are surrounded by the hot air, and are gradually changed into the gelatin solution; and when the hot air generator stops working, the temperature in the heating space 211 gradually decreases, at this time, the gelatin solution is gradually changed into the gelatin gel.

[0052] In an embodiment, the temperature control assembly 2 includes a plurality of electric heating sheets, the plurality of electric heating sheets are attached to the outer wall of the printing pool 11 and are arranged around the printing pool 11 to enclose the heating space 211.

[0053] It can be understood that the plurality of electric heating sheets can be attached to the outer wall of the printing pool 11 or the inner wall of the printing pool 11, the plurality of electric heating sheets can be attached at intervals or completely attached around, which is not limited herein. At the same time, the temperature control assembly 2 also includes a plurality of refrigeration sheets, the plurality of refrigeration sheets can be attached to the inner wall and / or the outer wall of the printing pool 11 at the same time as the electric heating sheets, the electric heating sheets and the refrigeration sheets are respectively controlled to increase and decrease the temperature of the printing pool 11 to promote the conversion of the gelatin solution and the gelatin gel and improve the printing efficiency. The refrigeration sheet is a semiconductor refrigeration sheet, when a current passes through a thermocouple pair composed of a piece of N-type semiconductor material and a piece of P-type semiconductor material, heat transfer will occur between the two ends, the heat will be transferred from one end to the other end, thereby generating a temperature difference to form a cold end and a hot end, and the cold end is attached to the outer wall and / or the inner wall of the printing pool 11, and the hot end is arranged away from the outer wall and / or the inner wall of the printing pool 11.

[0054] In an embodiment, the 3D printing device 100 further includes a glue supply assembly, the glue supply assembly is arranged on the base 1 and is used to store gelatin particles, the glue supply assembly has a discharge end, the discharge end is communicated with the printing pool 11 to provide the printing pool 11 with the gelatin particles.

[0055] In the embodiment, the 3D printing device 100 further includes a glue supply assembly, the glue supply assembly is arranged on the base 1 and is used to store gelatin particles or gelatin powder, and the glue supply assembly can supplement the gelatin particles or the gelatin powder into the printing pool 11 when the printing pool 11 has the gelatin solution.

[0056] It can be understood that in the 3D printing process, due to the low content of gelatin, the concentration of the gelatin solution is low, and the strength of the gelatin gel formed subsequently is low, which cannot effectively support the spatial structure to be printed, so it is necessary to set a glue supply assembly for supplementing gelatin particles or gelatin powder to the gelatin solution in the printing pool 11. The glue supply assembly can supplement gelatin into the gelatin solution in real time according to the current state of the spatial structure to be printed.

[0057] Specifically, the 3D printing device 100 is provided with a posture sensor for detecting the state and posture of the spatial structure to be printed. The posture sensor detects whether there is a difference between the current spatial structure to be printed and the predetermined digital model, such as deflection, tilting or partial structure distortion. If there is a difference, the current 3D printing operation is stopped, the temperature of the heating space 211 is raised by the temperature control assembly 2, the area gelatin in the printing pool 11 is converted into gelatin solution, then gelatin particles or gelatin powder are supplemented into the gelatin solution, the temperature is continuously raised, all solid gelatin is dissolved in water to form a gelatin solution with higher concentration, and the temperature of the heating space 211 is lowered again by using a refrigerator or a cooling fin, so that the gelatin solution is converted into gelatin gel, and the 3D printing operation is continued or restarted.

[0058] In another embodiment of the present application, the 3D printing device 100 further comprises a recovery assembly. The recovery assembly is arranged on the base 1 and is in communication with the printing pool 11 for recovering the gelatin solution in the printing pool 11. The recovery assembly comprises a recovery tank and a recovery pipeline in communication with the recovery tank. The end of the recovery pipeline away from the recovery tank is in communication with the printing pool 11, and a control valve is arranged on the recovery pipeline. After the control valve is opened, the gelatin solution in the form of solution in the printing pool 11 can enter the recovery tank through the recovery pipeline. When the control valve is closed, the communication between the printing pool 11 and the recovery tank is cut off.

[0059] In addition, a heat preservation member is arranged outside or inside the recovery tank. The heat preservation member can heat the whole recovery tank to keep the inside of the recovery tank at a certain temperature, so that the gelatin solution entering the recovery tank always exists in the form of solution and will not form gelatin gel due to cooling. A filter is further arranged inside the recovery tank. The filter divides the inside of the recovery tank into a first cavity and a second cavity. The filter can filter the gelatin solution after demolding from the spatial structure, filter impurities and concrete stones into the first cavity, and recover the pure gelatin solution into the second cavity, so as to complete the recovery of the gelatin solution for use in the next printing process, and improve the recycling rate of construction materials.

[0060] In an embodiment, the glue supply assembly comprises a glue storage tank and a glue supply line. The glue storage tank forms a containing cavity for storing gelatin particles. One end of the glue supply line is in communication with the containing cavity, and the other end forms a discharge end.

[0061] It can be understood that the glue storage tank is formed with a containing cavity for storing gelatin particles or gelatin powder, one end of the glue supply line is communicated with the containing cavity, the other end forms the discharge cavity described above, and is communicated with the printing pool 11;Wherein, the glue supply line can be a conveying belt or a conveying guide groove, which is not limited here.

[0062] In an embodiment, the printing assembly 3 further comprises a feeding module, the feeding module comprising a storage tank and a screw extrusion pump, the 3D printing device 100 performs 3D printing by using concrete, the storage tank is used to store concrete, one end of the screw extrusion pump is communicated with the storage tank, and the other end is communicated with the printing head 32, and the screw extrusion pump is used to extrude concrete into the printing head 32.

[0063] In this embodiment, the printing assembly 3 further comprises a feeding module communicated with the printing head 32, the feeding module comprising a storage tank storing concrete used for 3D printing, and a screw extrusion pump, one end of the screw extrusion pump being communicated with the storage tank, and the other end being communicated with the printing head 32 through a pipeline.

[0064] It can be understood that the printing head 32 can be driven by the driving mechanism 31 to extend into the printing pool 11 to perform printing work, and the feeding module can provide the printing head 32 with concrete for 3D printing, the screw extrusion pump can continuously transmit the concrete in the storage tank to the printing head 32 through the rotation of the internal screw rod, and continuously add the concrete in the gelatin gel through the printing head 32 to form the designed spatial structure.

[0065] In an embodiment, the storage tank is provided with a stirrer, the stirrer comprising a driving member and a plurality of stirring blades, the driving member being arranged at the bottom of the storage tank, the plurality of stirring blades being connected to the output end 312 of the driving member and located in the inner cavity of the storage tank, and the stirring blades being used to stir the concrete in the storage tank.

[0066] It can be understood that the storage tank is provided with a stirrer for continuously stirring the concrete, the stirrer comprising a driving member and a plurality of stirring blades, the driving member being arranged at the bottom of the storage tank, and the output end 312 of the driving member extending into the inner cavity of the storage tank through the stirrer to connect the plurality of stirring blades and drive the plurality of stirring blades to stir the concrete in the inner cavity of the storage tank.

[0067] The present application also provides a 3D printing system, which comprises a control device and the 3D printing device 100 described above, and the 3D printing device 100 is electrically connected to the control device. The specific structure of the 3D printing device 100 is referred to the foregoing embodiments, since the present 3D printing system adopts all the technical solutions of the foregoing embodiments, it at least has all the beneficial effects brought by the technical solutions of the foregoing embodiments, which will not be repeated here.

[0068] It can be understood that the control device is used for controlling the overall operation of the 3D printing device 100, and the control device is electrically connected to the temperature control assembly 2 to control the temperature of the heating space 211 through the temperature control assembly 2, so as to control the temperature of the gelatin solution, and the control device is also electrically connected to the temperature sensor to receive the current temperature value of the heating space 211 detected by the temperature sensor; and is also electrically connected to the attitude sensor to receive whether the current attitude of the model to be printed is consistent with the predetermined digital model detected by the attitude sensor, and to adjust the temperature of the heating space 211 and the content of gelatin provided by the gelatin supply assembly to the gelatin solution in real time according to the working condition.

[0069] Specifically, in the process of printing the space structure, the temperature in the heating space 211 needs to be kept low, so that the gelatin gel keeps the current gel state and has high support strength, and if the attitude sensor detects that the gelatin gel cannot meet the current support effect of the space structure during the printing process, the control device needs to control the gelatin supply assembly to supplement gelatin into the gelatin solution to increase the concentration of the gelatin solution, so as to improve the support strength of the subsequent gelatin gel; after the printing of the space structure is completed, the space structure needs to be demolded, and when the temperature is low, the gelatin gel cannot be completely converted into gelatin solution, so that the gelatin gel cannot be completely separated from the printed space structure, at this time, the control device needs to increase the temperature in the heating space 211 through the temperature control assembly 2 to facilitate the demolding of the space structure.

[0070] The above is only an optional embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation made under the concept of the present application, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A 3D printing device, characterized in that, The 3D printing device includes: A base platform, wherein the base platform is provided with a printing pool, and the printing pool contains a gelatin solution with a concentration of 10% to 15%; Temperature control component, the temperature control component being used to control the temperature of the gelatin solution; and A printing assembly, comprising a drive mechanism and a print head, wherein the drive mechanism has a fixed end and an output end, the fixed end is fixed to the base, and the print head is connected to the output end for extending into the print pool under the drive of the drive mechanism to perform printing. The 3D printing device also includes a gelatin supply assembly, which is disposed on the base and is used to store gelatin particles. The gelatin supply assembly has a discharge end, which is connected to the printing pool to provide gelatin particles to the printing pool. The printing assembly also includes a feeding module, which includes a storage tank and a spiral extrusion pump. The 3D printing device performs 3D printing using concrete. The storage tank is used to store concrete. One end of the spiral extrusion pump is connected to the storage tank, and the other end is connected to the print head. The spiral extrusion pump is used to extrude the concrete into the print head.

2. The 3D printing apparatus according to claim 1, characterized in that, The temperature control component forms a heating space, which is arranged around the printing pool.

3. The 3D printing apparatus according to claim 2, characterized in that, The temperature control component includes a temperature control box, which is disposed on the base and surrounds the printing pool. The heating space is formed between the inner wall of the temperature control box and the outer wall of the printing pool. The temperature control component also includes a heater for heating the air within the heating space.

4. The 3D printing apparatus according to claim 3, characterized in that, The heater is a hot air blower, and the hot air blower is connected to the heating space; The hot air blower is used to blow hot air into the heating space to control the temperature of the gelatin solution.

5. The 3D printing apparatus according to claim 2, characterized in that, The temperature control component includes multiple heating elements, which are attached to the outer wall of the printing pool and arranged around the printing pool to form the heating space.

6. The 3D printing apparatus according to claim 1, characterized in that, The adhesive supply assembly includes: A gelatin storage tank, wherein a cavity for storing gelatin particles is formed therein; and The glue supply line has one end connected to the receiving cavity and the other end forming the discharge end.

7. The 3D printing apparatus according to claim 1, characterized in that, The storage tank is equipped with a stirrer, which includes a drive unit and multiple stirring blades. The drive unit is located at the bottom of the storage tank, and the multiple stirring blades are connected to the output end of the drive unit and located in the inner cavity of the storage tank. The stirring blades are used to stir the concrete in the storage tank.

8. A 3D printing system, characterized in that, The 3D printing system includes: Control device; and The 3D printing apparatus according to any one of claims 1 to 7, wherein the 3D printing apparatus is electrically connected to the control device.

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