Raw material premixing device for 3D printing

Abstract

The utility model relates to the technical field of 3D printing, and discloses a raw material premixing device for 3D printing, a mixing stirring rod is driven by a first motor to rotate in a stirring box seat, a rotating screen wheel is detachably mounted in a screening box seat through a screen wheel mounting seat, and the rotating screen wheel is driven by a second motor to rotate in the screening box seat. The screening box base is arranged on the upper portion of the stirring box base, when mixing operation is carried out, fed raw material particles can be screened in advance through the rotating screening wheel in the screening box base, the rotating screening wheel is simple and compact in structure, large-particle raw materials mixed in raw materials can be removed through rotation, and the uniformity of the raw material particles can be guaranteed; and the rotary screen wheel is of a detachable mounting structure, the rotary screen wheel is embedded, fastened and mounted through the screen wheel mounting seat, the structure is simple, disassembly and assembly are convenient, large-particle raw materials in the rotary screen wheel can be conveniently poured and taken out after use, and the use convenience of the device is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing, in particular to a raw material premixing device for 3D printing. Background Art

[0002] 3D printing is a type of rapid prototyping technology, also known as additive manufacturing. It is a technology that uses digital model files as the basis and uses powdered metal or plastic and other bondable materials to construct objects by printing layer by layer. It has the advantages of flexible use, precise processing, and fast speed. It is widely used in mold manufacturing, parts manufacturing, industrial design and other fields. According to the color and material requirements of the parts, multiple raw materials need to be pre-mixed before printing. In order to improve the mixing efficiency and uniformity, a raw material pre-mixing device is required when mixing the raw materials.

[0003] Since the material is granular, due to the differences in raw material processing, there will be a certain amount of large particles mixed inside the granular raw materials. Most traditional raw material premixing devices only have a mixing function. After mixing, large particles of raw materials are mixed inside the materials. During printing operations, the uneven material particles will affect the printing effect of the product. Utility Model Content

[0004] The purpose of the utility model is to provide a raw material premixing device for 3D printing, so as to solve the problem that most of the traditional raw material premixing devices proposed in the above background technology only have a mixing function, and large particles of raw materials are mixed inside the material after mixing. When performing printing operations, the uneven material particles will affect the printing effect of the product.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A raw material premixing device for 3D printing comprises a stirring mechanism and a screening mechanism. The stirring mechanism comprises a stirring box seat, a first motor, a transmission belt and a mixing stirring rod. The mixing stirring rod rotates inside the stirring box seat under the drive of the first motor.

[0007] The screening mechanism is located on the upper part of the stirring box seat, and the screening mechanism includes a screening box seat, a second motor, a screen wheel mounting seat and a rotating screen wheel. The rotating screen wheel is detachably mounted inside the screening box seat through the screen wheel mounting seat, and the rotating screen wheel rotates inside the screening box seat under the drive of the second motor.

[0008] Furthermore, the mixing and stirring rod is rotatably mounted inside the stirring box seat via a rotating shaft, and the first motor is fixedly mounted on the side of the stirring box seat via bolts.

[0009] Furthermore, a driving pulley is fixed to the driving shaft end of the first motor, a driven pulley is fixed to the upper rotating shaft end of the mixing and stirring rod, and the transmission belt is connected to the upper parts of the driving pulley and the driven pulley.

[0010] Furthermore, the screening box seat is fixedly installed on the upper part of the stirring box seat, a feed discharge port is provided at the connection between the screening box seat and the stirring box seat, a discharge port is provided at the bottom of the stirring box seat, and the feeding discharge port is communicated with the discharge port.

[0011] Furthermore, the rotating screen wheel is rotatably mounted on one side of the screen wheel mounting seat via a rotating shaft, screen holes are evenly arranged on the upper portion of the rotating screen wheel, the second motor is fixed to the other side of the screen wheel mounting seat via bolts, and the rotating shaft end of the rotating screen wheel is fixedly connected to the driving shaft end of the second motor.

[0012] Furthermore, a screening cavity is provided inside the screening box seat, a positioning groove is provided on the opening side of the screening cavity, an engaging positioning block is fixed on the side of the screening wheel mounting seat, the screening wheel mounting seat is engaged and installed in the opening side of the screening cavity through the engaging positioning block, and the screening wheel mounting seat is fastened to the screening box seat by bolts.

[0013] Furthermore, a feeding trough seat is fixed on the side of the above-mentioned screening box seat, the lower part of the feeding trough seat is connected with the screening chamber, a material guide plate is provided at the connection between the feeding trough seat and the screening chamber, and a feeding port is provided on the side of the rotating screen wheel, and the material guide plate protrudes into the inner side of the feeding port.

[0014] Compared with the prior art, the utility model has the following technical effects:

[0015] The raw material premixing device for 3D printing is provided with a screening box seat on the upper part of the stirring box seat. When performing a mixing operation, the input raw material particles can be pre-screened by using the rotating screen wheel in the screening box seat. The rotating screen wheel has a simple and compact structure, and large particles of raw materials mixed in the raw materials can be removed by rotating, thereby ensuring the uniformity of the raw material particles and improving the printing quality of the product. A detachable mounting structure is adopted for the rotating screen wheel, and the rotating screen wheel is fastened and installed by means of a screen wheel mounting seat. The structure is simple and the disassembly and assembly are convenient. After use, the large particles of raw materials in the rotating screen wheel can be easily dumped out, thereby greatly improving the convenience of using the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the front structure of the raw material premixing device for 3D printing of the utility model;

[0017] Figure 2 This is a schematic diagram of the overall rear side structure of the raw material premixing device for 3D printing of the utility model;

[0018] Figure 3 This is a schematic diagram of the installation structure of the screen wheel mounting seat of the utility model;

[0019] Figure 4 This is a schematic diagram of the installation structure of the rotating screen wheel of the utility model;

[0020] Figure 5 This is a schematic diagram of the internal structure of the stirring box seat and the screening box seat of the utility model;

[0021] Among them, 1-stirring box seat, 2-first motor, 3-transmission belt, 4-mixing stirring rod, 5-driving pulley, 6-driven pulley, 7-discharge port, 8-screening box seat, 9-second motor, 10-screen wheel mounting seat, 11-rotating screen wheel, 12-screening cavity, 13-feeding trough seat, 14-material guide plate, 15-feeding port. DETAILED DESCRIPTION

[0022] The technical solution of the present utility model will be described clearly and completely in the following in conjunction with the accompanying drawings in the form of embodiments.

[0023] See also Figures 1 to 5 The present embodiment provides a raw material premixing device for 3D printing, including a stirring mechanism and a screening mechanism. The stirring mechanism is used for stirring and mixing materials. The stirring mechanism includes a stirring box seat 1, a first motor 2, a transmission belt 3 and a mixing stirring rod 4. Figure 1 As shown, the stirring box seat 1 is cylindrical. In order to facilitate the stirring and mixing of materials, the mixing and stirring rod 4 is rotatably installed inside the stirring box seat 1 through a rotating shaft. The first motor 2 is fixed to the side of the stirring box seat 1 by bolts. In order to realize drive transmission, a driving pulley 5 is fixed to the driving shaft end of the first motor 2, and a driven pulley 6 is fixed to the upper rotating shaft end of the mixing and stirring rod 4. The transmission belt 3 is connected to the upper part of the driving pulley 5 and the driven pulley 6, and the driving force of the first motor 2 can be transmitted to the rotating shaft end of the mixing and stirring rod 4, thereby realizing the rotational drive of the mixing and stirring rod 4.

[0024] The screening mechanism is used for screening the raw material particles. The screening mechanism is located on the upper part of the stirring box seat 1. The screening mechanism includes a screening box seat 8, a second motor 9, a screen wheel mounting seat 10 and a rotating screen wheel 11. Figure 2 As shown, the screening box seat 8 is fixedly installed on the upper part of the stirring box seat 1. In order to facilitate the falling of the raw materials, a feed discharge port is provided at the connection between the screening box seat 8 and the stirring box seat 1, and a discharge port 7 is provided at the bottom of the stirring box seat 1. The feed discharge port is connected to the discharge port 7 to realize the connection of the raw materials in and out.

[0025] In order to realize rotary screening, the rotating screen wheel 11 is rotatably mounted on one side of the screen wheel mounting seat 10 through a rotating shaft. In order to perform screening and separation of materials, as shown in the attached Figure 4As shown, sieve holes are evenly arranged on the upper part of the rotating screen wheel 11. In order to realize the rotational drive of the rotating screen wheel 11, the second motor 9 is fixed to the other side of the screen wheel mounting seat 10 by bolts, and the rotating shaft end of the rotating screen wheel 11 is fixedly connected to the driving shaft end of the second motor 9. The rotating screen wheel 11 rotates inside the screening box seat 8 under the drive of the second motor 9. The rotating screen wheel 11 in the screening box seat 8 can be used to pre-screen the input raw material particles. The rotating screen wheel 11 has a simple and compact structure, and large particles mixed in the raw materials can be removed by rotation, thereby ensuring the uniformity of the raw material particles.

[0026] A screening chamber 12 is provided inside the screening box seat 8. In order to facilitate the fitting installation of the sieve wheel mounting seat 10, a positioning groove is provided on the opening side of the screening chamber 12. A fitting positioning block is fixed on the side of the sieve wheel mounting seat 10. The sieve wheel mounting seat 10 is fitted and installed on the opening side of the screening chamber 12 through the fitting positioning block. The sieve wheel mounting seat 10 is fastened and installed with the screening box seat 8 by bolts. A detachable mounting structure is adopted for the rotating sieve wheel 11. The rotating sieve wheel 11 is fitted and fastened and installed through the sieve wheel mounting seat 10. The structure is simple and easy to disassemble and assemble. After use, it is convenient to pour out the large-particle raw materials in the rotating sieve wheel 11. In order to facilitate the input of raw materials, as shown in the attached Figure 5 As shown, a feeding trough seat 13 is fixed on the side of the screening box seat 8, and the lower part of the feeding trough seat 13 is connected with the screening chamber 12. In order to facilitate the raw materials to enter the rotating screen wheel 11, a guide plate 14 is arranged at the connection between the feeding trough seat 13 and the screening chamber 12, and a feeding port 15 is arranged on the side of the rotating screen wheel 11. The guide plate 14 protrudes and extends into the inner side of the feeding port 15. The raw materials are guided to flow through the guide plate 14, so that the raw materials can smoothly enter the interior of the rotating screen wheel 11.

[0027] Working principle or structural principle, when working, start the device, the second motor 9 drives the rotating screen wheel 11 to rotate at a uniform speed, and then the printing raw material particles are put into the screening box seat 8 from the feeding trough seat 13. The single feeding needs to be controlled at half the volume of the feeding trough seat 13, and the feeding operation is completed in small amounts and multiple times. The raw material screening operation is completed under the rotating screening action of the rotating screen wheel 11, and the large particles of raw material particles remain in the rotating screen wheel 11. The screened raw material goes down into the stirring box seat 1, and then, driven by the first motor 2, the mixing and stirring rod 4 rotates inside the stirring box seat 1 to stir and mix the raw materials in the stirring box seat 1. After completion, the equipment is stopped and the discharge port 7 at the bottom of the stirring box seat 1 is opened to discharge the mixed raw material particles, thereby completing the mixing operation of the printing raw materials.

[0028] After use, remove the bolts on the side of the sieve wheel mounting seat 10, then take out the sieve wheel mounting seat 10 together with the rotating sieve wheel 11 by pulling, then pour out and collect the large particle raw materials in the rotating sieve wheel 11, then install and reset the sieve wheel mounting seat 10 and the rotating sieve wheel 11, and install and tighten the sieve wheel mounting seat 10 with bolts to complete the reset operation.

[0029] In summary, the premixing device is provided with a screening box seat 8 on the upper part of the stirring box seat 1. When performing mixing operations, the rotating screen wheel 11 in the screening box seat 8 can be used to pre-screen the input raw material particles. The rotating screen wheel 11 has a simple and compact structure, and can remove large particles of raw materials mixed in the raw materials by rotation, thereby ensuring the uniformity of the raw material particles and improving the printing quality of the product. A detachable mounting structure is adopted for the rotating screen wheel 11, and the rotating screen wheel 11 is fastened and installed by the screen wheel mounting seat 10. The structure is simple and the disassembly and assembly are convenient. After use, the large particles of raw materials in the rotating screen wheel 11 can be easily dumped out, which greatly improves the convenience of use of the device.

[0030] The above describes in detail the implementation modes of the present invention in conjunction with the accompanying drawings, but the present invention is not limited to the above implementation modes. Various changes, modifications, substitutions and variations can be made within the knowledge scope of ordinary technicians in the field without departing from the purpose of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A raw material premixing device for 3D printing, characterized in that: include: A stirring mechanism and a screening mechanism, wherein the stirring mechanism comprises a stirring box seat, a first motor, a transmission belt and a mixing stirring rod, wherein the mixing stirring rod is driven by the first motor to rotate inside the stirring box seat, The screening mechanism is located on the upper part of the stirring box seat, and the screening mechanism includes a screening box seat, a second motor, a screen wheel mounting seat and a rotating screen wheel. The rotating screen wheel is detachably mounted inside the screening box seat through the screen wheel mounting seat, and the rotating screen wheel rotates inside the screening box seat under the drive of the second motor.

2. The raw material premixing device for 3D printing according to claim 1, characterized in that: The mixing and stirring rod is rotatably mounted inside the stirring box seat via a rotating shaft, and the first motor is fixedly mounted on the side of the stirring box seat via bolts.

3. The raw material premixing device for 3D printing according to claim 2, characterized in that: A driving pulley is fixed to the driving shaft end of the first motor, a driven pulley is fixed to the upper rotating shaft end of the mixing and stirring rod, and the transmission belt is connected to the upper parts of the driving pulley and the driven pulley.

4. The raw material premixing device for 3D printing according to claim 3, characterized in that: The screening box seat is fixedly installed on the upper part of the stirring box seat, a feed discharge port is arranged at the connection between the screening box seat and the stirring box seat, a discharge port is arranged at the bottom of the stirring box seat, and the feeding discharge port is communicated with the discharge port.

5. The raw material premixing device for 3D printing according to claim 4, characterized in that: The rotating screen wheel is rotatably mounted on one side of the screen wheel mounting seat via a rotating shaft, and screen holes are evenly arranged on the upper portion of the rotating screen wheel. The second motor is fixed to the other side of the screen wheel mounting seat via bolts, and the rotating shaft end of the rotating screen wheel is fixedly connected to the driving shaft end of the second motor.

6. The raw material premixing device for 3D printing according to claim 5, characterized in that: A screening cavity is arranged inside the screening box seat, a positioning groove is arranged on the opening side of the screening cavity, an engaging positioning block is fixed on the side of the screening wheel mounting seat, the screening wheel mounting seat is engaged and installed in the opening side of the screening cavity through the engaging positioning block, and the screening wheel mounting seat is fastened to the screening box seat by bolts.

7. The raw material premixing device for 3D printing according to claim 6, characterized in that: A feeding trough seat is fixed on the side of the screening box seat, the lower part of the feeding trough seat is connected with the screening chamber, a material guide plate is arranged at the connection between the feeding trough seat and the screening chamber, a feeding port is arranged on the side of the rotating screen wheel, and the material guide plate protrudes into the inner side of the feeding port.

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