3D printing device based on chemical reaction deposition

Abstract

The utility model discloses a 3D printing device based on chemical reaction deposition, and relates to the technical field of additive manufacturing, the 3D printing device comprises a forming chamber, a liquid spraying mechanism, a powder spreading mechanism and a forming cylinder are arranged in the forming chamber, a liquid supply device is arranged at the top of the forming chamber, and the liquid supply device is connected with a flow guide device. The liquid supply device is used for inputting colloidal reaction substances into the flow guide device and comprises a temporary storage tank arranged on the forming chamber, a feeding hopper used for inputting the colloidal reaction substances into the temporary storage tank is arranged on the side wall of the temporary storage tank, and a push plate used for pushing materials to the bottom of the temporary storage tank is movably arranged in the temporary storage tank on one side of the feeding hopper. The top of the push plate is connected with a support used for pushing the push plate to ascend and descend, and the support is provided with a telescopic rod used for pushing the support to ascend and descend. Therefore, liquid can be stably supplied to the liquid spraying mechanism, the liquid supply stability is improved, the hose can be effectively protected, and meanwhile normal work of the liquid spraying mechanism is prevented from being affected.

Description

Technical Field

[0001] This utility model relates to the field of additive manufacturing technology, specifically a 3D printing device based on chemical reaction deposition. Background Technology

[0002] 3D printing, a widely accepted term for Additive Manufacturing (AM), is an advanced technology that constructs objects layer by layer using digital model files as blueprints. This technology relies on powdered metals, plastics, or other bondable materials, which are precisely placed and solidified under computer control to build the final three-dimensional solid (i.e., "layered manufacturing"). Initially, 3D printing technology was mainly used in mold making and industrial design for rapid prototyping. Subsequently, its applications have gradually expanded to direct product manufacturing, and numerous parts printed using this technology have been successfully used in actual production.

[0003] In numerous industries, 3D printing technology has demonstrated unparalleled flexibility and efficiency. In the jewelry industry, it enables the creation of complex and intricate designs; in footwear manufacturing, it makes the production of customized shoe molds and soles possible. In industrial design, designers use 3D printing to rapidly iterate on prototypes, accelerating product development cycles. In the architecture, engineering, and construction (AEC) industry, 3D printing is used to print architectural models, complex structural components, and even entire buildings, driving innovation in the construction sector. In the automotive and aerospace industries, 3D printing is used to manufacture lightweight, high-strength components, optimizing performance and reducing costs. In the dental and medical industries, personalized medical devices, prostheses, and orthodontic appliances can all be efficiently produced using 3D printing. In education, 3D printing is used for intuitive teaching, enhancing the student learning experience. In Geographic Information Systems (GIS) and civil engineering, 3D printing provides new avenues for constructing terrain models and complex structures. Furthermore, it has applications in niche fields such as gun manufacturing and art creation, showcasing its cross-disciplinary potential.

[0004] In the existing technology system, a utility model patent with publication number CN207828410U introduces an innovative 3D printing system based on liquid-solid chemical reaction deposition. This system includes a sealed forming chamber to maintain environmental stability during the printing process; a powder cylinder to store the powder material to be deposited; a forming cylinder as a platform for building parts; a powder spreading mechanism responsible for uniformly spreading the powder layer; and a three-axis linkage mechanism located within the sealed forming chamber, which precisely plans and moves the nozzle according to instructions from the 3D printer control system. This nozzle is a specially designed liquid nozzle, connected to an external liquid supply device via a follow-up conduit, the liquid supply device containing a specific gel-like reactive substance.

[0005] The system works by utilizing the chemical reaction between a gel-like substance and a powdered substance to produce a solid precipitate. Specifically, based on a digital model of the part, the control system calculates the movement path of the nozzle and controls the liquid nozzle to move within a selected area, continuously spraying out the gel-like reactive substance. Upon contact with the substrate powder, these substances undergo a chemical reaction, forming a solid deposition layer.

[0006] The liquid-solid chemical reaction deposition-based 3D printer does not disclose the specific structure of the liquid supply device, cannot stably supply liquid to the spraying mechanism, and fails to protect the follow-up conduit, which is a flexible tube that is prone to breakage when pulled directly. Therefore, we propose a chemical reaction deposition-based 3D printing device to solve the above problems. Utility Model Content

[0007] The purpose of this invention is to provide a 3D printing device based on chemical reaction deposition to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A 3D printing device based on chemical reaction deposition includes a molding chamber, which is equipped with a liquid spraying mechanism, a powder spreading mechanism, and a molding cylinder. A liquid supply device is provided on the top of the molding chamber, and the liquid supply device is connected to a flow guiding device. The liquid supply device is used to input a gel-like reactive substance into the flow guiding device. The liquid supply device includes a temporary storage tank on the molding chamber. A feed hopper for inputting the gel-like reactive substance into the temporary storage tank is provided on the side wall of the temporary storage tank. A pusher plate for pushing material to the bottom of the temporary storage tank is movable inside the temporary storage tank on one side of the feed hopper. A bracket for pushing the pusher plate up and down is connected to the top of the pusher plate. A telescopic rod for pushing the bracket up and down is provided on the bracket.

[0010] Preferably, the diversion device is used to connect the temporary storage tank and the spraying mechanism.

[0011] Preferably, the flow guiding device includes a flexible tube with rigid tubes connected to both ends, and a spring for supporting the flexible tube is passed through the flexible tube.

[0012] Preferably, the temporary storage tank is located at the top of the molding chamber, and the distance between the bottom of the feed hopper and the top of the temporary storage tank is greater than the height of the push plate.

[0013] Preferably, the outer wall of the push plate is provided with a sealing sleeve, the vertical part of the bracket moves through the top of the temporary storage tank, and the telescopic rod is provided with two sets symmetrically distributed on the top of the temporary storage tank.

[0014] Preferably, the bracket has a T-shaped structure.

[0015] Preferably, the free end of the rigid tube connected to the top of the flexible tube is fixedly inserted through the top of the molding chamber and connected to the bottom of the temporary storage tank.

[0016] Preferably, the hose is an elastic hose.

[0017] Preferably, the free end of the rigid tube connected to the bottom of the flexible tube is connected to the spraying mechanism, and the two ends of the spring are respectively connected to two sets of rigid tubes.

[0018] Preferably, the spring is a flexible spring.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] 1. The gelatinous reactant is fed into the temporary storage tank through the feed hopper. The highest point of the gelatinous reactant in the temporary storage tank is below the feed hopper. The telescopic rod is driven, which pulls the support down. The support pushes the push plate down, and the push plate moves down to contact the gelatinous reactant and pushes it into the guiding device. Through the guiding device, the reactant enters the spraying mechanism, thus completing the liquid supply to the spraying mechanism. This ensures a stable liquid supply to the spraying mechanism and improves the stability of the liquid supply.

[0021] 2. The gel-like reactant enters the hose through a rigid tube, and then the gel-like reactant in the hose is introduced into the spraying mechanism through a lower set of rigid tubes. When the spraying mechanism is working, it moves and pulls the bottom rigid tube, which pulls the spring to swing. The swinging of the spring causes the hose to swing with the spring, preventing direct pulling on the hose and effectively protecting the hose while avoiding affecting the normal operation of the spraying mechanism. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the liquid supply device in this utility model;

[0024] Figure 3 This is a schematic diagram of the flow guiding device in this utility model.

[0025] In the diagram: 1. Molding chamber; 2. Spraying mechanism; 3. Powder spreading mechanism; 4. Molding cylinder; 5. Liquid supply equipment; 51. Temporary storage tank; 52. Feed hopper; 53. Push plate; 54. Support; 55. Telescopic rod; 6. Flow guiding device; 61. Hose; 62. Rigid pipe; 63. Spring. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1-3 A 3D printing device based on chemical reaction deposition includes a forming chamber 1. The forming chamber 1 is equipped with a liquid spraying mechanism 2, a powder spreading mechanism 3, a forming cylinder 4, a powder recovery cylinder, and a powder cylinder. The forming chamber 1, the liquid spraying mechanism 2, the powder spreading mechanism 3, and the forming cylinder 4 are existing technologies. According to the utility model with announcement number CN207828410U, the liquid spraying mechanism 2 performs liquid spraying, the powder spreading mechanism 3 performs powder spreading, and the forming cylinder 4, the powder recovery cylinder, and the powder cylinder are used to cooperate with the powder spreading mechanism 3 to spread powder.

[0028] A liquid supply device 5 is provided at the top of the molding chamber 1. The liquid supply device 5 is connected to a flow guiding device 6. The liquid supply device 5 is used to input the gel-like reactive material into the flow guiding device 6. The liquid supply device 5 includes a temporary storage tank 51 installed on the molding chamber 1. A feed hopper 52 for inputting the gel-like reactive material into the temporary storage tank 51 is provided on the side wall of the temporary storage tank 51. A pusher plate 53 for pushing material to the bottom of the temporary storage tank 51 is movable inside the temporary storage tank 51 on one side of the feed hopper 52. The top of the pusher plate 53 is connected to a device for pushing the pusher plate 51. 3. A lifting support 54 is provided on the support 54, and a telescopic rod 55 is provided on the support 54 for pushing the support 54 to lift. The temporary storage tank 51 is located at the top of the forming chamber 1. The distance between the bottom of the feed hopper 52 and the top of the inner part of the temporary storage tank 51 is greater than the height of the push plate 53. The outer wall of the push plate 53 is provided with a sealing sleeve. The support 54 has a T-shaped structure. The vertical part of the support 54 moves through the top of the temporary storage tank 51. Two sets of telescopic rods 55 are symmetrically distributed on the top of the temporary storage tank 51. The telescopic rods 55 can be electric or hydraulic telescopic rods, etc.

[0029] The gelatinous reactant is fed into the temporary storage tank 51 through the feed hopper 52. The highest point of the gelatinous reactant in the temporary storage tank 51 is below the feed hopper 52. The telescopic rod 55 is driven, which pulls the support 54 downward. The support 54 pushes the push plate 53 downward. The push plate 53 moves downward and contacts the gelatinous reactant, pushing it into the guide device 6. Through the guide device 6, the reactant enters the spraying mechanism 2, completing the liquid supply to the spraying mechanism 2. This ensures a stable liquid supply to the spraying mechanism 2 and improves the stability of the liquid supply.

[0030] The flow guiding device 6 is used to connect the temporary storage tank 51 and the spraying mechanism 2. The flow guiding device 6 includes a hose 61, with rigid pipes 62 connected to both ends of the hose 61. A spring 63 for supporting the hose 61 is movably passed through the hose 61. The hose 61 is an elastic hose. The free end of the rigid pipe 62 connected to the top of the hose 61 is fixed through the top of the molding chamber 1 and connected to the bottom of the temporary storage tank 51. The free end of the rigid pipe 62 connected to the bottom of the hose 61 is connected to the spraying mechanism 2. The two ends of the spring 63 are respectively connected to two sets of rigid pipes 62. The spring 63 is a bendable spring.

[0031] The gel-like reactive substance enters the hose 61 through the rigid tube 62, and then the gel-like reactive substance in the hose 61 is introduced into the spraying mechanism 2 through a lower set of rigid tubes 62. When the spraying mechanism 2 is working, it moves and pulls the bottom rigid tube 62. The bottom rigid tube 62 pulls the spring 63 to swing. The swinging of the spring 63 makes the hose 61 swing with the spring 63, preventing direct pulling of the hose 61, thus effectively protecting the hose and avoiding affecting the normal operation of the spraying mechanism 2.

[0032] Working Principle: This invention feeds the gelatinous reactant into the temporary storage tank 51 through the feed hopper 52. The highest point of the gelatinous reactant in the temporary storage tank 51 is below the feed hopper 52. The telescopic rod 55 is driven, which pulls the support 54 downward. The support 54 pushes the push plate 53 downward, which then contacts the gelatinous reactant and pushes it into the guiding device 6. Through the guiding device 6, the gelatinous reactant enters the spraying mechanism 2, thus completing the liquid supply to the spraying mechanism 2. This ensures a stable liquid supply to the spraying mechanism 2 and improves the stability of the liquid supply. The gelatinous reactant enters the flexible tube 61 through the rigid tube 62, and then the lower set of rigid tubes 62 guides the gelatinous reactant in the flexible tube 61 into the spraying mechanism 2. When the spraying mechanism 2 is working, it moves and pulls the bottom rigid tube 62, which pulls the spring 63 to swing. The swinging of the spring 63 causes the flexible tube 61 to swing with the spring 63, preventing direct pulling on the flexible tube 61 and effectively protecting the flexible tube while avoiding affecting the normal operation of the spraying mechanism 2.

[0033] The telescopic rod 55 and spring 63, as well as the control of the liquid nozzle to select and move and continuously spray out gel-like reactive material to chemically deposit with the matrix powder, are all existing technologies. After solidification, the entire part is finally formed. These technologies will not be described in detail here.

[0034] The method of using the 3D printing device based on chemical reaction deposition of this invention includes the following steps:

[0035] Step 1: Prepare the gelatinous reaction substance

[0036] Obtain the gel-like reactive material suitable for chemical reaction deposition in this 3D printing device, ensuring that its quality, concentration, and other parameters meet the printing requirements, and prepare a sufficient quantity to meet the needs of the entire printing process.

[0037] Step 2: Feeding the colloidal reactant

[0038] The prepared gelatinous reactant is slowly poured into the temporary storage tank 51 through the feed hopper 52. During the pouring process, care should be taken to ensure that the highest point of the gelatinous reactant in the temporary storage tank 51 is always below the feed hopper 52 to avoid the gelatinous reactant overflowing into the feed hopper 52 and causing waste or blockage.

[0039] Step 3: Start the liquid supply equipment

[0040] Two sets of telescopic rods 55 symmetrically distributed at the top of the temporary storage tank 51 are driven to retract, pulling the T-shaped support 54 downward along the through-channel reserved at the top of the temporary storage tank 51. During the downward movement of the support 54, the push plate 53 connected to it is pushed downward simultaneously. Because the outer wall of the push plate 53 is equipped with a sealing sleeve, the temporary storage tank 51 is sealed during the downward movement of the push plate 53, preventing leakage of the gelatinous reactive material. When the push plate 53 moves down to contact the gelatinous reactive material, it continues to push the push plate 53, squeezing the gelatinous reactive material towards the bottom of the temporary storage tank 51, allowing it to enter the guiding device 6.

[0041] Step 4: Guide the liquid supply to the spray mechanism

[0042] The gelatinous reactant entering the diversion device 6 first flows into the flexible tube 61 via a rigid tube 62 connected to the bottom of the temporary storage tank 51 at the top. Since the flexible tube 61 is elastic and has a flexible spring 63 running through it, with both ends of the spring 63 connected to two sets of rigid tubes 62, when the gelatinous reactant is inside the flexible tube 61, the lower set of rigid tubes 62 guides the gelatinous reactant into the spraying mechanism 2, completing the liquid supply process. During this process, even if the spraying mechanism 2 moves and pulls the bottom rigid tube 62, the bottom rigid tube 62 pulls the spring 63 to swing, causing the flexible tube 61 to swing accordingly. This effectively avoids directly pulling the flexible tube 61, protecting the flexible tube and ensuring that the spraying mechanism 2 can work normally and stably obtain the gelatinous reactant for spraying.

[0043] Step 5: Start the 3D printing process

[0044] While the liquid supply is stable, the spraying mechanism 2, the powder spreading mechanism 3, and the forming cylinder 4 are activated. The spraying mechanism 2 moves according to a preset program, precisely spraying the gelatinous reactive substance onto the base powder; the powder spreading mechanism 3 moves synchronously to spread the powder evenly, ensuring full contact between the base powder and the gelatinous reactive substance; the forming cylinder 4 cooperates with the powder spreading mechanism 3 to perform the powder spreading operation and supports the part being formed. Working together, through the principle of chemical reaction deposition, the gelatinous reactive substance undergoes a chemical deposition reaction with the base powder. Through layer-by-layer accumulation and solidification, the entire part is gradually formed.

[0045] Step Six: Post-Print Processing

[0046] After the part printing is complete, stop the operation of the spraying mechanism 2, powder spreading mechanism 3, and other equipment. Open the forming chamber 1, carefully remove the formed part from the forming cylinder 4, and perform necessary post-processing procedures on the part, such as cleaning residual powder from the surface and conducting quality inspections to ensure that the part meets the usage requirements. If there is still residual gelatinous reaction material in the temporary storage tank 51, it can be recycled or disposed of depending on the actual situation. If it needs to be reused, it should be properly sealed and stored to prevent the gelatinous reaction material from deteriorating and affecting the subsequent printing effect.

[0047] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A 3D printing device based on chemical reaction deposition, comprising a forming chamber (1), a liquid spraying mechanism (2), a powder laying mechanism (3) and a forming cylinder (4) are arranged in the forming chamber (1), characterized in that: The top of the forming chamber (1) is provided with a liquid supply device (5), the liquid supply device (5) is connected with a flow guide device (6), the liquid supply device (5) is used for inputting the gel-like reaction material into the flow guide device (6), the liquid supply device (5) comprises a temporary storage tank (51) arranged on the forming chamber (1), the temporary storage tank (51) is provided with a feeding hopper (52) for inputting the gel-like reaction material into the temporary storage tank (51), the feeding hopper (52) is movably provided with a push plate (53) for pushing the material to the bottom of the temporary storage tank (51), the top of the push plate (53) is connected with a support (54) for pushing the push plate (53) to move up and down, and the support (54) is provided with a telescopic rod (55) for pushing the support (54) to move up and down.

2. The chemical-reaction-deposition-based 3D printing device according to claim 1, characterized by: The flow guide device (6) is used for connecting the temporary storage tank (51) and the liquid spraying mechanism (2).

3. The chemical-reaction-deposition-based 3D printing device according to claim 2, characterized in that: The flow guide device (6) comprises a hose (61), both ends of the hose (61) are connected with a hard pipe (62), and the hose (61) is movably penetrated by a spring (63) for supporting the hose (61).

4. The chemical-reaction-deposition-based 3D printing device according to claim 1, characterized by: The temporary storage tank (51) is arranged on the top of the forming chamber (1), the distance between the bottom of the feeding hopper (52) and the top of the temporary storage tank (51) is greater than the height of the push plate (53).

5. The chemical reaction deposition based 3D printing device according to claim 1, wherein: The outer wall of the push plate (53) is provided with a sealing sleeve, the vertical part of the support (54) movably penetrates the top of the temporary storage tank (51), and the telescopic rod (55) is provided with two groups of symmetrical distribution on the top of the temporary storage tank (51).

6. The chemical-reaction-deposition-based 3D printing device according to claim 5, characterized in that: The support (54) is a T-shaped structure.

7. The chemical-reaction-deposition-based 3D printing device according to claim 3, characterized by: The free end of the hard pipe (62) connected with the top end of the hose (61) is fixedly penetrated through the top of the forming chamber (1) and connected with the bottom of the temporary storage tank (51).

8. The chemical-reaction-deposition-based 3D printing device according to claim 7, characterized in that: The hose (61) is an elastic hose.

9. The chemical reaction deposition based 3D printing device according to claim 3, wherein: The free end of the hard pipe (62) connected with the bottom end of the hose (61) is connected with the liquid spraying mechanism (2), and the two ends of the spring (63) are connected with the two groups of hard pipes (62).

10. The chemical reaction deposition based 3D printing device according to claim 9, characterized in that: The spring (63) is a bendable spring.

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