Multi-material powder mixing structure and powder mixing equipment

Abstract

The utility model discloses a multi-material powder mixing structure and powder mixing equipment, the multi-material powder mixing structure comprises a powder mixing cylinder, the powder mixing cylinder comprises a powder mixing part and a powder inlet / outlet, the section of the powder mixing cylinder is in a spiral shape, the spiral shape comprises an inner end arc part and an outer end arc part, the inner end arc part forms the powder mixing part, and the outer end arc part forms the powder mixing part. An opening is formed between the outer side of the outer end arc part and the outer side of the inner end arc part and forms the powder inlet and outlet, and the powder mixing barrel rotates in the spiral shape to mix powder and rotates in the reverse spiral shape to pour out the powder. The powder mixing equipment comprises a powder mixing barrel, a motor, a powder collecting box and a plurality of powder storage bins, the powder storage bins are communicated with the powder collecting box through corresponding pipelines, an outlet of the powder collecting box is located above a powder inlet and a powder outlet of the powder mixing barrel, and an output shaft of the motor is connected with the powder mixing barrel. The powder mixing device has the beneficial effects that the powder mixing cylinder can uniformly mix various powders, the structure is simple, the production cost is low, and the energy consumption during powder mixing is reduced; the powder mixing equipment is simple in structure and small in occupied space, and the production cost of the equipment is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of powder mixing equipment structure, in particular to a multi-material powder mixing structure and powder mixing equipment. Background Art

[0002] In both the pharmaceutical chemical industry and the additive printing industry, multiple powders need to be mixed together. In order to ensure the quality of the products produced, the various powders need to be mixed as evenly as possible.

[0003] Existing mixing equipment basically mixes powders by setting a stirring shaft to stir multiple powders. For example, patent announcement No. CN217746552U blows powder into a powder mixing chamber by setting a powder blowing structure. The mixed powder diffuses rapidly at the moment it enters the powder mixing chamber, so that the powder is mixed for the first time. A stirring shaft and several stirring members are set to further mix the powder to obtain mixed powder. This device needs to add a powder blowing device to mix the powder for the first time in the powder mixing chamber, as well as a stirring shaft and stirring members, etc., which makes the overall structure of the powder mixer complex and has many parts, resulting in high production costs and large space occupation. Summary of the invention

[0004] The first purpose of the utility model is to provide a multi-material powder mixing structure that can mix various powders evenly and has a simple and compact structure, low production cost, and reduces energy consumption during powder mixing; the second purpose is to provide a powder mixing equipment that has a simple structure, occupies a small space, and reduces the production cost of the equipment.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions.

[0006] A multi-material powder mixing structure comprises a powder mixing cylinder, the powder mixing cylinder comprises a powder mixing portion and a powder inlet and outlet, the cross-section of the powder mixing cylinder is spiral-shaped, the spiral shape comprises an inner arc portion and an outer arc portion, the inner arc portion constitutes the powder mixing portion, an opening is formed between the outer arc portion and the outer side of the inner arc portion, and the opening constitutes the powder inlet and outlet.

[0007] The utility model adopting the above technical solution sets the cross section of the powder mixing barrel into a spiral shape, and makes the inner end arc portion of the spiral form a powder mixing portion for mixing multiple powders, and forms an opening between the outer end arc portion of the spiral and the outer side of the inner end arc portion, so that multiple powders can enter the powder mixing barrel from the opening, and when the powder mixing barrel is rotated in a spiral shape, the multiple powders can rotate along the inner wall of the powder mixing portion under the action of centrifugal force, and fall from the inner end of the spiral to the outer end arc portion near the inner end of the spiral, and then rotate again under the action of centrifugal force, so that the powders are mixed evenly in this cycle, and the powders are prevented from flowing out of the powder inlet and outlet during the mixing process under the action of the outer end arc portion, and when the powders are mixed evenly, the powder mixing barrel is rotated in the reverse spiral shape to pour out the powders. The powder mixing barrel with a spiral cross section has a simple structure, a small volume, and a low production cost, which reduces the energy consumption when mixing powders, reduces the space occupied by the powder mixing structure, reduces the space used for the factory, and further reduces the cost.

[0008] Preferably, the arc segment from the point where the arc at the outer end of the spiral is aligned with the inner end of the spiral to the outer end of the spiral constitutes the outer end arc portion, the arc length center angle α of the outer end arc portion is 90°~110º, and the arc length center angle of the inner end arc portion is 360°~370º.

[0009] In this way, by setting the arc length center angle α of the arc section from the point where the inner end of the spiral is aligned with the outer end arc to the outer end of the spiral to 90°~110º, the arc length center angle of the inner end arc portion is 360°~370º, which is convenient for preventing the powder from falling out of the powder mixing barrel when mixing the powder, and for smoothly pouring out the evenly mixed powder when rotating in the reverse spiral shape.

[0010] Preferably, the outer side wall of the powder mixing cylinder is connected with a connecting shaft, and is connected to the motor output shaft through the connecting shaft.

[0011] In this way, by connecting the connecting shaft to the outer side wall of the powder mixing cylinder, it is convenient to connect the motor output shaft with the connecting shaft, and the rotation of the motor drives the mixing cylinder to rotate to mix or pour powder.

[0012] In order to achieve the above-mentioned second purpose, an embodiment of the utility model also provides a powder mixing device, including the above-mentioned multi-material powder mixing structure, and also including a motor, a powder collecting box and several powder storage bins, the several powder storage bins are respectively connected to the powder collecting box through corresponding pipes, the outlet of the powder collecting box is located above the powder inlet and outlet of the powder mixing barrel, and the output shaft of the motor is connected to the powder mixing barrel.

[0013] The utility model adopts the above technical solution, by connecting several powder storage bins with the powder collecting box through corresponding pipes, so that the powder in the powder storage bin enters the powder collecting box from the pipe, falls out from the outlet of the powder collecting box into the powder inlet and outlet of the powder mixing barrel, and then enters the powder mixing barrel. The powder mixing barrel is rotated by the action of the motor to mix the powder. The overall structure of the powder mixing equipment is simple, the space occupied is small, and the production cost of the equipment is reduced.

[0014] Preferably, a switch is installed at one end of each pipeline away from the powder storage bin.

[0015] In this way, by installing a switch at the end of each pipeline away from the powder storage bin, it is convenient to control the flow of each powder through the switch, so as to achieve online real-time proportional mixing of powders, instead of measuring each powder amount separately and then mixing it, thereby improving production efficiency and achieving the simultaneous completion of powder proportioning and powder mixing.

[0016] Preferably, the powder collecting box is a triangular box structure as a whole, the top of the powder collecting box is open, and an opening is formed at the top corner opposite to the top, the switches are respectively located above the openings, and the openings are located above the powder inlet and outlet of the powder mixing barrel.

[0017] In this way, by setting the powder collecting box as a triangular box structure as a whole, the powder in the powder storage bin can smoothly and vertically enter the top opening of the powder collecting box under the action of gravity, and the opening is set at the top angle of the triangle, which makes it convenient for the powder to slide along the powder collecting box and gather at the opening, so that the powder can smoothly enter the powder mixing barrel.

[0018] Preferably, it further comprises a protective shell, wherein the protective shell is connected to the lower end of the powder collecting box, and the opening and the powder mixing cylinder are both located on the inner side of the protective shell.

[0019] In this way, the protective shell is provided to protect the powder mixing cylinder and the lower end outlet of the powder collecting box, so as to prevent external dust from entering into the mixed powder and contaminating the quality of the mixed powder.

[0020] Preferably, the motor is mounted on a side surface of the protective shell, and a through hole is formed on the protective shell for the motor output shaft to pass through.

[0021] In this way, the protective shell provides support for the motor, which facilitates the installation of the motor, instead of separately setting up a bracket to install the motor, thus saving production costs.

[0022] Preferably, a powder supply box is further included, a chute is formed at the bottom of the protective shell, the powder supply box is located below the protective shell, and the chute is aligned with the powder inlet of the powder supply box.

[0023] In this way, by forming a chute at the bottom of the protective shell, the evenly mixed powder can be easily transported from the chute to the powder supply box, and the powder supply box provides printing materials to the additive printer, so that powder mixing and printing can be carried out simultaneously, thereby improving production efficiency.

[0024] Preferably, the switch and the motor are both electrically connected to the control terminal.

[0025] In this way, by electrically connecting the switch and the motor to the control terminal, it is convenient to control the opening and closing of each switch, the opening and closing of the motor, and the rotation direction of the motor output shaft.

[0026] The beneficial effect of the utility model is that by setting the cross-section of the powder mixing barrel to a spiral shape, and making the inner end arc portion of the spiral form a powder mixing portion for mixing multiple powders, the powder can be easily rotated, dropped, and then rotated under the action of centrifugal force, and the powder can be mixed evenly in such a cycle. The powder mixing barrel with a spiral cross-section has a simple structure, a small volume, and a low production cost, which reduces the energy consumption when mixing powders, reduces the space occupied by the powder mixing structure, reduces the use space of the factory, and further reduces costs. The arc length center angle of the arc segment from the point where the inner end of the spiral is aligned with the outer end arc to the outer end of the spiral is set to 90°~110º, which is convenient for preventing the powder from falling out of the powder mixing barrel when mixing powder, and for smoothly pouring out the evenly mixed powder when rotating in the reverse spiral shape. By connecting several powder storage bins with the powder collecting box through corresponding pipes, the powder in the powder storage bin can enter the powder collecting box, fall out from the outlet of the powder collecting box into the powder inlet and outlet of the powder mixing cylinder, and then enter the powder mixing cylinder. The powder mixing cylinder is rotated by the motor to mix the powder. The equipment has a simple structure, occupies a small space, and reduces the production cost of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is the structural diagram of the powder mixing equipment of the utility model;

[0028] Figure 2 This is a structural diagram of the powder mixing equipment of the utility model after removing the protective shell;

[0029] Figure 3 This is a structural diagram of the powder mixing tube of the utility model;

[0030] Figure 4 It is a cross-sectional view of the powder mixing cylinder of the utility model. DETAILED DESCRIPTION

[0031] The present invention will be further described below in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiments described.

[0032] The reference numerals in the drawings of the specification include: powder mixing cylinder 1, powder inlet and outlet 11, powder mixing part 12, connecting shaft 13, outer end arc part 14, motor 2, powder storage bin 3, pipeline 31, switch 32, powder collecting box 4, protective shell 5, powder supply box 6.

[0033] See also Figure 3 to Figure 4 A multi-material powder mixing structure comprises a powder mixing barrel 1, wherein the powder mixing barrel 1 comprises a powder mixing portion 12 and a powder inlet and outlet 11, wherein the cross-section of the powder mixing barrel 1 is spiral-shaped, wherein the spiral comprises an inner arc portion and an outer arc portion 14, wherein the inner arc portion constitutes the powder mixing portion 12, wherein an opening is formed between the outer arc portion 14 and the outer side of the inner arc portion, wherein the opening constitutes the powder inlet and outlet 11, wherein the powder mixing barrel 1 rotates along the spiral shape to mix the powder, and rotates counter to the spiral shape to pour out the powder.

[0034] See also Figure 3 and Figure 4 The arc section from the point where the spiral outer end arc is aligned with the spiral inner end to the spiral outer end constitutes the outer end arc portion 14, the arc length center angle α of the outer end arc portion 14 is 90°~110º, and the arc length center angle of the inner end arc portion is 360°~370º. Setting the arc length center angle of the arc section from the point where the spiral inner end and the outer end arc are aligned to the spiral outer end to 90°~110º facilitates preventing the powder from falling out of the powder mixing barrel 1 when mixing the powder, and facilitates the smooth pouring of the evenly mixed powder when rotating in the reverse spiral shape.

[0035] See also Figure 2 The outer wall of the powder mixing cylinder 1 is connected with a connecting shaft 13, which is connected to the output shaft of the motor 2 through the connecting shaft 13. By connecting the connecting shaft 13 to the outer wall of the powder mixing cylinder 1, it is convenient to connect the output shaft of the motor 2 with the connecting shaft 13, and the rotation of the motor 2 drives the mixing cylinder to rotate to mix or pour powder.

[0036] Embodiment 2, a powder mixing device, includes the above-mentioned multi-material powder mixing structure, and also includes a motor 2, a powder collecting box 4 and several powder storage bins 3, the several powder storage bins 3 are respectively connected to the powder collecting box 4 through corresponding pipes 31, the outlet of the powder collecting box 4 is located above the powder inlet and outlet 11 of the powder mixing barrel 1, and the output shaft of the motor 2 is connected to the powder mixing barrel 1.

[0037] See also Figure 1 and Figure 2 , a switch 32 is installed at one end of each of the pipes 31 away from the powder storage bin 3. The switch 32 in the utility model can be a metering valve, etc., to control the flow of each powder storage bin 3 into the powder collecting box 4, so as to achieve online proportional mixing of powders, instead of measuring each powder amount separately before mixing, thereby improving production efficiency and achieving powder proportioning and powder mixing uniformity at the same time.

[0038] See also Figure 1 and Figure 2 The powder collecting box 4 is a triangular box structure as a whole. The top of the powder collecting box 4 is open, and an opening is formed at the vertex angle opposite to the top. The switches 32 are respectively located above the openings, and the openings are located above the powder inlet and outlet ports 11 of the powder mixing cylinder 1. It is convenient for the powder in the powder storage bin 3 to smoothly enter the top opening of the powder collecting box 4 vertically. The opening is set at the vertex angle of the triangle, which is convenient for the powder to slide along the powder collecting box 4 and gather at the opening, so that the powder can smoothly enter the powder mixing cylinder 1. The powder collecting box 4 can also adopt other structures such as a cone.

[0039] See also Figure 1 , further comprising a protective shell 5, the protective shell 5 being connected to the lower end of the powder collecting box 4, the opening and the powder mixing cylinder 1 being both located inside the protective shell 5, to prevent external dust from entering the mixed powder and contaminating the quality of the mixed powder. The protective shell 5 can be connected to the lower end of the powder collecting box 4 by riveting, threading, clamping, or other connection methods.

[0040] See also Figure 1 , the motor 2 is mounted on the side of the protective shell 5, and a through hole is formed on the protective shell 5 for the output shaft of the motor 2 to pass through. In this way, the protective shell 5 provides support for the motor 2, which facilitates the installation of the motor 2, instead of setting up a separate bracket to install the motor 2, saving production costs. The motor 2 can be connected to the protective shell 5 by threaded connection or welding.

[0041] See also Figure 1 and Figure 2 , and also includes a powder supply box 6, a chute is formed at the bottom of the protective shell 5, the powder supply box 6 is located below the protective shell 5, and the chute is aligned with the powder inlet of the powder supply box 6. In this way, by forming a chute at the bottom of the protective shell 5, it is convenient for the mixed powder to enter the powder supply box 6 from the chute, and the powder supply box 6 provides printing materials for the printer, so that powder mixing and printing are carried out simultaneously, thereby improving production efficiency.

[0042] See also Figure 1 , the switch 32 and the motor 2 are both electrically connected to the control terminal. In this way, by electrically connecting the switch 32 and the motor 2 to the control terminal, it is convenient to control the opening and closing of each switch 32, the opening and closing of the motor 2, and the rotation direction of the output shaft of the motor 2.

[0043] During operation, the control terminal issues an instruction to each switch 32 to open the pipeline 31, and the powder in the powder storage bin 3 enters the powder collecting box 4, and then enters the powder mixing tube 1. When the powder reaches the mixing amount of each powder mixing tube 1, the control terminal issues an instruction to close the switch 32 and start the motor 2 to rotate in a spiral shape to mix the powder. When the powder mixing time reaches the set time, the control terminal issues an instruction for the motor 2 to rotate in a reverse spiral shape to pour out the dust into the powder supply box 6, and the mixing and pouring of powder are repeated in this way. Rotation in the spiral direction in the utility model refers to rotation in the circumferential direction from the inner end of the spiral to the outer end of the spiral, and reverse spiral rotation refers to rotation in the opposite direction from the inner end of the spiral to the outer end of the spiral.

[0044] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A multi-material powder mixing structure, characterized in that: The invention comprises a powder mixing cylinder (1), wherein the powder mixing cylinder (1) comprises a powder mixing portion (12) and a powder inlet and outlet (11), wherein the cross section of the powder mixing cylinder (1) is spiral-shaped, wherein the spiral shape comprises an inner arc portion and an outer arc portion (14), wherein the inner arc portion constitutes the powder mixing portion (12), and an opening is formed between the outer arc portion (14) and the outer side of the inner arc portion, wherein the opening constitutes the powder inlet and outlet (11).

2. The multi-material powder mixing structure according to claim 1, characterized in that: The arc length center angle α of the outer end circular arc portion (14) is 90° to 110°, and the arc length center angle of the inner end circular arc portion is 360° to 370°.

3. The multi-material powder mixing structure according to claim 1, characterized in that: The outer side wall of the powder mixing cylinder (1) is connected to a connecting shaft (13), and the connecting shaft (13) is used to be connected to an output shaft of a motor (2).

4. A powder mixing device, comprising the multi-material powder mixing structure according to any one of claims 1 to 3, characterized in that: It also comprises a motor (2), a powder collecting box (4) and a plurality of powder storage bins (3), wherein the plurality of powder storage bins (3) are respectively connected to the powder collecting box (4) through corresponding pipes (31), the outlet of the powder collecting box (4) is located above the powder inlet and outlet (11) of the powder mixing barrel (1), and the output shaft of the motor (2) is used to be connected to the powder mixing barrel (1).

5. The powder mixing device according to claim 4, characterized in that: A switch (32) is installed at one end of each of the pipes (31) away from the powder storage bin (3).

6. The powder mixing device according to claim 5, characterized in that: The powder collecting box (4) is in the form of a triangular box structure as a whole. The top of the powder collecting box (4) is open, and an opening is formed at a vertex angle opposite to the top. The switches (32) are respectively located above the openings, and the openings are located above the powder inlet and outlet ports (11) of the powder mixing cylinder (1).

7. The powder mixing device according to claim 6, characterized in that: It also comprises a protective shell (5), wherein the protective shell (5) is connected to the lower end of the powder collecting box (4), and the opening and the powder mixing cylinder (1) are both located on the inner side of the protective shell (5).

8. The powder mixing device according to claim 7, characterized in that: The motor (2) is mounted on the side of the protective shell (5), and the protective shell (5) is formed with a through hole for the output shaft of the motor (2) to pass through.

9. The powder mixing device according to claim 7, characterized in that: It also includes a powder supply box (6), a chute is formed at the bottom of the protective shell (5), the powder supply box (6) is located below the protective shell (5), and the chute is aligned with the powder inlet of the powder supply box (6).

10. The powder mixing device according to claim 5, characterized in that: The switch (32) and the motor (2) are both electrically connected to the control terminal.

Images