An automatic control 3D printing material mixing device

Abstract

The utility model discloses an automatic control 3D printing material mixing device, including support frame, mixing hopper, drive motor and rotation axis, is equipped with spiral mixing paddle on rotation axis, is equipped with feeding assembly on mixing hopper top, is equipped with knocking assembly on support frame. Feeding assembly controls feeding hole opening and closing through the first baffle of sliding in slide, realizes the automatic ration of multiple component materials and puts in, and knocking assembly uses spring reset to drive knocking rod to hit knock piece, and produces vibration and breaks the material agglomeration and adhesion in mixing hopper. The device rotates mixing paddle through the reducer of drive motor, realizes the spiral stirring of material and uniform mixing, and combines mechanical knock anti - sticky structure simultaneously, improves mixing efficiency and stability. The utility model structure is compact, and can complete material proportioning and mixing process automatically, reduces manual intervention, is applicable to industrial grade 3D printing scene, and effectively improves material mixing quality and production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of mixing equipment technology, specifically to an automatic control device for mixing 3D printing materials. Background Technology

[0002] Sand mold 3D printing materials need to be mixed, primarily to ensure that the printed sand mold meets the multiple requirements of the casting process. A single material cannot simultaneously possess sufficient strength, good permeability, and high-temperature stability. By mixing base sand, binders, and additives, the base sand forms the mold's skeleton, the binder binds the sand grains together to increase strength, and the additives improve permeability and resilience, preventing porosity or cracks in the casting. A proper ratio of these materials allows for a balance between strength, permeability, and high-temperature resistance in the sand mold, ensuring that the mold does not break during molten metal pouring and that gases can escape, thus producing qualified metal parts.

[0003] In the prior art, an automatic control 3D printing material mixing device with publication number "CN221937526U" includes a mixing cylinder and a control device. The mixing cylinder includes a feeding mechanism and a mixing mechanism. The feeding mechanism is located above the mixing mechanism and has a feeding bin. A control component is installed inside the feeding bin to control the material within it. A flow hole is located at the bottom of the feeding bin and communicates with the mixing mechanism. The mixing mechanism includes a mixing chamber that communicates with the flow hole and has a mixing component inside it for mixing the material within the mixing chamber. This invention achieves precise mixing and control of different materials through the mixing cylinder and control system. Simultaneously, it improves production efficiency and printing quality, reduces the need for manual intervention, and also reduces material waste and saves costs.

[0004] However, existing technologies still have significant shortcomings, such as:

[0005] Traditional mixing equipment lacks an effective anti-sticking mechanism. For materials such as metal powder and high-viscosity resin, material can easily accumulate on the cylinder wall and clump inside due to electrostatic adsorption or physical adhesion, requiring frequent shutdowns for manual cleaning, which affects production continuity and increases maintenance costs. Utility Model Content

[0006] The purpose of this invention is to provide an automatic control device for mixing 3D printing materials to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] An automatic control 3D printing material mixing device includes a support frame, on which a mixing hopper, a drive motor, a reducer, and a rotating shaft are mounted. The rotating shaft is rotatably mounted on the support frame and passes through the mixing hopper. The output shaft of the drive motor is fixedly connected to the input shaft of the reducer. The reducer is fixedly mounted on one side of the support frame located in the mixing hopper. The output shaft of the reducer is fixedly connected to the rotating shaft. A spiral mixing paddle is fixedly mounted on the rotating shaft. Several feeding components are fixedly mounted on the top of the mixing hopper. A striking component for striking the mixing hopper is mounted on the support frame.

[0009] Preferably, the feeding assembly includes a feeding frame fixedly disposed on the top of the mixing hopper, the feeding frame communicating with the mixing hopper, a first slide rail fixedly disposed on the feeding frame, a first baffle plate slidably disposed in the first slide rail, a feeding hopper fixedly disposed on the top of the feeding frame, and a feeding hole communicating with the mixing hopper being opened at the bottom of the feeding hopper. The feeding hole can be opened or closed by changing the position of the first baffle plate.

[0010] Preferably, a first telescopic cylinder is fixedly installed on the support frame, the movable end of the first telescopic cylinder passing through the side wall of the feeding frame and fixedly connected to the bottom of the first baffle plate.

[0011] Preferably, the striking assembly includes several striking plates fixedly disposed on the side wall of the mixing hopper, several sliding rods slidably disposed on the support frame, several striking rods fixedly disposed on the sliding rods, connecting rods fixedly disposed at the ends of the several sliding rods, and springs sleeved on the sliding rods, the springs being fixedly disposed between the connecting rods and the support rods;

[0012] When the connecting rod is pulled and then released, the spring is stretched and reset, and the slide rod drives the striking rod to strike the striking plate under the reset force of the spring.

[0013] Preferably, the striking assembly further includes an L-shaped rod fixedly mounted on the connecting rod, a rotating rod rotatably mounted on the support frame, a worm gear fixedly mounted at one end of the rotating rod, a worm fixedly mounted at one end of the rotating shaft, the worm gear meshing with the worm, a crank fixedly mounted at the other end of the rotating rod, and a guide wheel rotatably mounted on the crank.

[0014] Preferably, it also includes a feeding frame, which is fixedly installed at the bottom of the mixing hopper, and a second slide rail is provided on the feeding frame, in which a second baffle is slidably installed;

[0015] A second telescopic cylinder is fixedly installed on the support frame. The movable end of the second telescopic cylinder passes through the side wall of the feeding frame and is fixedly connected to the bottom of the second baffle plate.

[0016] The bottom of the mixing hopper is provided with a discharge hole. The discharge hole can be opened or closed by changing the position of the second baffle plate.

[0017] Preferably, the bottoms of both the feeding hopper and the mixing hopper are arc-shaped.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. The device achieves automatic anti-sticking through the striking component. The rotating shaft drives the worm gear mechanism to drive the crank guide wheel, which periodically pulls the L-shaped rod on the connecting rod. Under the action of the spring return force, the slide bar drives the striking rod to hit the striking plate on the side wall of the mixing hopper, generating high-frequency vibration, effectively breaking up material lumps and adhering to the cylinder wall, ensuring a smooth mixing process and avoiding the impact of material accumulation on the uniformity of mixing.

[0020] 2. The material assembly is driven by the control system to drive the first telescopic cylinder, which precisely controls the sliding of the first baffle plate to realize the opening and closing of the feeding hole and the flow rate adjustment. It can automatically complete the quantitative feeding of multi-component materials according to the preset ratio, and realize the proportional control of different materials without manual intervention, thereby improving the efficiency and accuracy of material mixing and meeting the automation requirements of industrial 3D printing for material mixing.

[0021] In the process of using this utility model, the control system first drives the first baffle plate to open the feeding hole according to the preset ratio through the first telescopic cylinder (the control system is a mature existing technology and will not be described in detail here), so that different materials fall from the feeding hopper into the mixing hopper with an arc-shaped bottom; then the drive motor drives the rotating shaft and the spiral mixing paddle to rotate through the reducer, so as to push the material axially and shear it radially to achieve uniform mixing; at the same time, the rotating shaft drives the crank guide wheel to periodically push the L-shaped rod through the worm gear mechanism, so that the connecting rod drives the striking rod to hit the striking plate under the action of the spring, vibrating the mixing hopper to prevent the material from sticking and accumulating; after the mixing is completed, the second telescopic cylinder drives the second baffle plate to open the discharge hole, and the mixed material is discharged through the discharge frame to the subsequent 3D printing process. The whole process is automated through the electrical control system to ensure the accuracy and stability of material mixing. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the overall device of this utility model;

[0023] Figure 2 This is a three-dimensional structural diagram of the overall device of this utility model from another perspective;

[0024] Figure 3 This is a three-dimensional structural diagram of the internal structure of this utility model;

[0025] Figure 4 This is a top view of the striking component of this utility model;

[0026] Figure 5 This is a schematic diagram of the internal three-dimensional structure of the feeding frame of this utility model;

[0027] Figure 6 This is a cross-sectional three-dimensional structural diagram of the mixing hopper of this utility model.

[0028] In the diagram: 1. Support frame; 2. Mixing hopper; 3. Drive motor; 4. Reducer; 5. Rotating shaft; 6. Mixing paddle; 701. Feeding frame; 702. First slide rail; 703. First baffle plate; 704. Feeding hopper; 705. Feeding hole; 706. First telescopic cylinder; 801. Striking plate; 802. Slide rod; 803. Striking rod; 804. Connecting rod; 805. Spring; 806. L-shaped rod; 807. Rotating rod; 808. Worm gear; 809. Worm; 8010. Crank; 8011. Guide wheel; 9. Discharge frame; 901. Second slide rail; 902. Second baffle plate; 903. Second telescopic cylinder; 904. Discharge hole. Detailed Implementation

[0029] 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.

[0030] Please see Figure 1-6 This utility model provides a technical solution:

[0031] This automated 3D printing material mixing device is mounted on the ground via a support frame 1. The support frame 1 is welded from metal profiles and provides structural support for the entire device.

[0032] The mixing hopper 2 is fixed to the upper part of the support frame 1. Its bottom is a rounded stainless steel structure, and its interior is hollow, forming a material mixing chamber. The drive motor 3 is bolted to one side of the support frame 1, and its output shaft is rigidly connected to the input shaft of the reducer 4 via a coupling. The reducer 4 housing is bolted to the support frame 1, and its output shaft is keyed to the rotating shaft 5 that passes through the mixing hopper 2, thus achieving torque transmission.

[0033] A spiral mixing impeller 6 is welded to the surface of the rotating shaft 5, and the outer diameter of the impeller blade maintains a uniform gap with the inner wall of the mixing hopper 2. Two feeding components are evenly distributed on the top of the mixing hopper 2;

[0034] The feeding assembly includes a feeding frame 701 welded to the top of the mixing hopper 2, which communicates with the interior of the mixing hopper 2. First slide rails 702 are provided on both sides of the feeding frame 701, and a first baffle plate 703 slides within the first slide rails 702. A feeding hopper 704 is welded to the top of the feeding frame 701, and a square feeding hole 705 is formed at its bottom. The cylinder body of a first telescopic cylinder 706 is bolted to the support frame 1, and its piston rod passes through the side wall of the feeding frame 701 and is welded to the bottom of the first baffle plate 703. The linear movement of the piston rod drives the first baffle plate 703 to slide within the first slide rails 702, thereby controlling the opening and closing of the feeding hole 705.

[0035] The striking assembly, used to prevent materials from sticking together inside the mixing hopper 2, includes multiple striking plates 801 welded to the side wall of the mixing hopper 2. Sliding rods 802 are slidably mounted on both sides of the support frame 1, and striking rods 803 corresponding to the striking plates 801 are welded to the surface of each sliding rod 802. Connecting rods 804 are welded to the ends of the two sliding rods 802, and springs 805 are sleeved on the surface of the sliding rods 802. The two ends of the springs 805 are welded to the connecting rods 804 and spring seats 805 on the support frame 1, respectively.

[0036] One end of the rotating shaft 5 is connected to and mounted with a worm gear 809 via a key. The support frame 1 is mounted with a rotating rod 807 via a bearing seat. One end of the rotating rod 807 is fitted with a worm wheel 808 that meshes with the worm gear 809, and the other end is fixed with a crank 8010 by welding. The end of the crank 8010 is fitted with a guide wheel 8011 via a bearing. The guide wheel 8011 is in intermittent contact with the L-shaped rod 806 welded to the connecting rod 804.

[0037] When the rotating shaft 5 rotates, the rotating rod 807 is driven to rotate through the worm gear 809 and worm wheel 808 mechanism. The crank 8010 drives the guide wheel 8011 to make circular motion, periodically pulling the L-shaped rod 806 so that the connecting rod 804 moves against the force of the spring 805. After the guide wheel 8011 leaves, the spring 805 resets and drives the striking rod 803 to strike the striking piece 801.

[0038] The bottom of the mixing hopper 2 is welded with a discharge frame 9, which has a similar structure to the feeding assembly, including a second slide 901, a second baffle 902, and a second telescopic cylinder 903. The cylinder body of the second telescopic cylinder 903 is fixed to the support frame 1, and the piston rod is connected to the second baffle 902, controlling the opening and closing of the discharge hole 904 through linear motion.

[0039] The working process of the device is as follows: The control system controls the first telescopic cylinder 706 according to the preset ratio, which drives the first baffle plate 703 to open the corresponding feeding hole 705, and different materials fall from the feeding hopper 704 into the mixing hopper 2. The drive motor 3 is started, and the power is transmitted to the rotating shaft 5 through the reducer 4, which drives the mixing paddle 6 to rotate and stir the materials.

[0040] The rotating shaft 5 synchronously drives the striking assembly, and through mechanical linkage, the striking rod 803 periodically strikes the striking plate 801 to prevent material accumulation. After the material is evenly mixed, the control system drives the second telescopic cylinder 903 to open the discharge hole 904, and the mixed material is discharged through the discharge frame 9 to the subsequent process. The entire process is automated through the electrical control system, ensuring the accuracy and stability of material mixing.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic control 3D printing material mixing device, comprising a support frame (1), wherein a mixing hopper (2), a drive motor (3), a reducer (4), and a rotating shaft (5) are disposed on the support frame (1), the rotating shaft (5) is rotatably disposed on the support frame (1) and passes through the mixing hopper (2), the output shaft of the drive motor (3) is fixedly connected to the input shaft of the reducer (4), the reducer (4) is fixedly disposed on one side of the support frame (1) located in the mixing hopper (2), and the output shaft of the reducer (4) is fixedly connected to the rotating shaft (5), characterized in that: A spiral mixing paddle (6) is fixedly installed on the rotating shaft (5), and several feeding components are fixedly installed on the top of the mixing hopper (2). A striking component for striking the mixing hopper (2) is installed on the support frame (1).

2. The automatic control 3D printing material mixing device according to claim 1, characterized in that: The feeding assembly includes a feeding frame (701) fixedly installed on the top of the mixing hopper (2). The feeding frame (701) is connected to the mixing hopper (2). A first slide rail (702) is fixedly installed on the feeding frame (701). A first baffle plate (703) is slidably installed in the first slide rail (702). A feeding hopper (704) is fixedly installed on the top of the feeding frame (701). A feeding hole (705) communicating with the mixing hopper (2) is opened at the bottom of the feeding hopper (704). The feeding hole (705) can be opened or closed by changing the position of the first baffle plate (703).

3. The automatic control 3D printing material mixing device according to claim 2, characterized in that: A first telescopic cylinder (706) is fixedly installed on the support frame (1). The movable end of the first telescopic cylinder (706) passes through the side wall of the feeding frame (701) and is fixedly connected to the bottom of the first baffle plate (703).

4. The automatic control 3D printing material mixing device according to claim 1, characterized in that: The striking assembly includes several striking plates (801) fixedly disposed on the side wall of the mixing hopper (2), several sliding rods (802) slidably disposed on the support frame (1), several striking rods (803) fixedly disposed on the sliding rods (802), connecting rods (804) fixedly disposed at the ends of several sliding rods (802), and springs (805) sleeved on the sliding rods (802). The springs (805) are fixedly disposed between the connecting rods (804) and the support frame (1). When the connecting rod (804) is pulled and then released, the spring (805) is stretched and reset, and the slide rod (802) drives the striking rod (803) to strike the striking piece (801) under the reset force of the spring (805).

5. The automatic control 3D printing material mixing device according to claim 4, characterized in that: The striking assembly also includes an L-shaped rod (806) fixedly mounted on a connecting rod (804), a rotating rod (807) rotatably mounted on the support frame (1), a worm gear (808) fixedly mounted on one end of the rotating rod (807), a worm (809) fixedly mounted on one end of the rotating shaft (5), the worm gear (808) meshing with the worm (809), a crank (8010) fixedly mounted on the other end of the rotating rod (807), and a guide wheel (8011) rotatably mounted on the crank (8010).

6. The automatic control 3D printing material mixing device according to claim 1, characterized in that: It also includes a feeding frame (9), which is fixedly installed at the bottom of the mixing hopper (2). A second slide rail (901) is provided on the feeding frame (9), and a second baffle plate (902) is slidably installed in the second slide rail (901). A second telescopic cylinder (903) is fixedly installed on the support frame (1). The movable end of the second telescopic cylinder (903) passes through the side wall of the feeding frame (9) and is fixedly connected to the bottom of the second baffle plate (902). The bottom of the mixing hopper (2) is provided with a discharge hole (904). By changing the position of the second baffle plate (902), the discharge hole (904) can be opened or closed.

7. The automatic control 3D printing material mixing device according to claim 2, characterized in that: The bottoms of both the feeding hopper (704) and the mixing hopper (2) are arc-shaped.

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