3D printing device

Abstract

The present invention provides a 3D printing device, the 3D printing device further comprising a powder supply device and a molding component, the powder spreading device being arranged between the powder supply device and the molding component, the powder spreading device being provided with a plurality of closely adjacent and independently arranged channels, one end of each of the channels being directly opposite to the powder supply device, and the other end being directly opposite to the molding component. The 3D printing device of the present invention can spread a variety of powder materials onto the molding component through the channels of the powder spreading device, has a simple structure, is easy to use, and can realize the molding of multi-material products.

Description

Technical Field

[0001] The present invention relates to the field of 3D printing, and in particular to a 3D printing device. Background Art

[0002] 3D printing is a type of rapid prototyping technology, also known as additive manufacturing. Different from the "removal method" of traditional cutting, it is a technology that uses a digital model file as the basis and uses powdered metal or plastic and other bondable materials to construct objects by printing layer by layer.

[0003] The existing 3D printing powder spreading method is to spread powder all over the sintering area at one time through a powder spreading device. During the powder spreading process when the powder spreading device moves from one end to the other, one type of powder will be spread in the sintering area. For molded parts, the material of the entire printing layer is the same when each layer is printed. For multi-material molded parts, the first type of powder is generally laid on the first layer, and the second type of powder is laid on the second layer or other layers. However, some molded parts are multi-layered complex structure products, which require different types of powder to be laid on the same layer. Summary of the invention

[0004] In view of this, it is necessary to provide a 3D printing device that is easy to use and can achieve laying of different types of powders on the same layer.

[0005] A 3D printing device, comprising a powder spreading device, a powder supply device, a transmission mechanism, a molding component, and a controller, wherein the powder spreading device is arranged between the powder supply device and the molding component, and the powder spreading device is provided with a plurality of closely adjacent and independently arranged channels, one end of each of the channels is directly opposite to the powder supply device, and the other end is directly opposite to the molding component; the powder spreading device and the powder supply device are respectively connected to the transmission mechanism to realize the movement of the powder spreading device and the powder supply device in a preset direction, the transmission mechanism comprises two slide rails and two motors, the powder spreading device is slidably arranged on one of the slide rails, and the powder supply device slides The powder supply device is arranged on the other slide rail, and the motor drives the powder spreading device and the powder supply device to slide on the corresponding slide rail respectively; the powder supply device is arranged above the powder spreading device, and is used to provide powder to the powder spreading device, and the powder supply device includes at least three powder supply boxes, and the types of powders in at least three powder supply boxes are different. A plurality of powder falling holes are provided at the bottom of each powder supply box, and the powder falling holes are used to supply powder to the powder spreading device; the powder falling holes are connected to the controller, and the controller is used to control the opening of one or more powder falling holes so that powder falls from the powder supply box into the corresponding channel.

[0006] Furthermore, the 3D printing device also includes a laser system for curing powder, a safety system for fault monitoring, and a cooling system for quickly cooling the cured molding layer.

[0007] Furthermore, the powder supply device also includes a switch arranged at the bottom of each powder supply box, and the switch is a cover controlled by a micro motor, and the switch is used to open and close the corresponding powder drop hole.

[0008] Furthermore, the switches are connected to a controller, and the controller controls the opening and closing of the switches to enable the powder to fall from the powder supply box into the corresponding channels.

[0009] Furthermore, the cross section of the channel is circular, with a diameter of 0.02 mm to 0.5 mm, and the axial distance between adjacent channels is 0.1 mm to 1 mm.

[0010] Furthermore, the cross-section of the powder spreading device is one of circular, rectangular or polygonal, and the cross-section of each channel is one of circular, rectangular or polygonal.

[0011] Compared with the prior art, the present invention provides a 3D printing device, which is provided with a powder spreading device. The powder spreading device is provided with a plurality of closely adjacent and independently arranged channels. One end of each channel faces the powder supply device, and the other end faces the molding component. The channels are used to convey powder to the molding component until the required powder is spread. The 3D printing device has a simple structure, convenient operation, and high precision. The 3D printing device can realize powder spreading of multiple materials on the same layer and complete the molding of multi-level complex structure products. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic structural diagram of the 3D printing device of the present invention.

[0013] Figure 2 It is a schematic structural diagram of the powder spreading device of the present invention.

[0014] Main component symbols

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[0016]

[0017] The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more of the related listed items.

[0021] See also Figure 1 , Figure 1 The 3D printing device 100 of the present invention is a structural schematic diagram. The 3D printing device 100 is used to manufacture a molded part by piling powder. The 3D printing device 100 includes a powder spreading device 10, a transmission mechanism 20, a molding assembly 30, and a powder supply device 40. The powder spreading device 10 and the powder supply device 40 are respectively connected to the transmission mechanism 20 to realize the movement of the powder spreading device 10 and the powder supply device 40 in a preset direction. The powder supply device 40 is arranged above the powder spreading device 10 and is used to provide powder to the powder spreading device 10.

[0022] See also Figure 2 , Figure 2 This is a schematic diagram of the structure of the powder spreading device 10 of the present invention, and the powder spreading device 10 is used to receive the powder falling from the powder supply device 40, and convey the powder to the molding component 30 for molding a molded part. The powder spreading device 10 is provided with a plurality of closely adjacent and independently arranged channels 101, and each of the channels 101 faces the molding component 30 at one end and faces the powder supply device 40 at the other end. The powder falls from the corresponding channel 101 onto the molding component 30 of the 3D printing device 100 for molding a molded part. The powder spreading device 10 is provided with an ultrasonic device (not shown), which can control the flow rate of the powder and ensure smooth powder falling. The cross-section of the powder spreading device 10 is one of circular, rectangular, and polygonal. In the present embodiment, the cross-section of the powder spreading device 10 is rectangular. The cross section of each channel 101 is one of circular, rectangular or polygonal, and a plurality of channels 101 are arranged in an orthogonal array or annular array at equal distances. When the cross section of the channel 101 is circular, the diameter is 0.02 mm to 0.5 mm, and the axial distance between adjacent channels 101 is 0.1 mm to 1 mm. In this embodiment, the cross section of each channel 101 is circular.

[0023] The transmission mechanism 20 includes two slide rails 211 and two motors 212. The powder spreading device 10 is slidably disposed on one of the slide rails 211, and the powder supply device 40 is slidably disposed on the other slide rail 211. One of the motors 212 is connected to the powder spreading device 10, and drives the powder spreading device 10 to slide on the corresponding slide rail 211. The other motor 212 is connected to the powder supply device 40, and drives the powder supply device 40 to slide on the corresponding slide rail 211. During the powder spreading process, the powder spreading device 10 can move left and right or be fixed in one position.

[0024] The molding assembly 30 is generally a hollow cylindrical structure, including a molding box 31 and a molding device 32 movably arranged in the molding box 31. The molding box 31 includes a cavity 311 opened along the axis. The cavity 311 passes through both ends of the molding box 31 along the axis and forms an opening 312 with one end of the molding device 32. The opening 312 is used to receive the powder falling from the channel 101. The molding device 32 includes a support plate 321, a support member 322 and a cylinder 323. The cylinder 323 is arranged at the bottom of the molding box 31. One end of the support rod 322 is connected to the cylinder 323, and the other end is connected to the side of the support plate 321 away from the powder spreading device 10. The cylinder 323 drives the support member 322 to drive the support plate 321 to move in the molding box 31. During the 3D printing process, each time a layer of printing is completed, the support plate 321 drops to a height of a powder spreading thickness.

[0025] The powder supply device 40 is arranged above the powder spreading device 10, and is used to provide powder to the powder spreading device 10. The powder supply device 40 includes a plurality of powder supply boxes 42 with a plurality of powder falling holes 41 at the bottom and a switch (not shown) arranged at the bottom of each powder supply box 42. The powder supply device 40 is used to supply powder to the powder spreading device 10. In this embodiment, there are three powder supply boxes 42, which are respectively filled with three different types of powder, namely, the first type of powder, the second type of powder and the third type of powder. The third type of powder can be a transition layer powder. In this embodiment, the switch (not shown) is a cover plate (not shown) controlled by a micro motor (not shown), and the switch (not shown) is used to open and close the powder falling holes 41. The switch (not shown) is connected to a controller (not shown), and the controller (not shown) is used to control the opening and closing of the plurality of switches (not shown) to achieve the powder falling from the powder supply box 42 to the corresponding channel 101.

[0026] The 3D printing device also includes a laser system for curing powder, a safety system for fault monitoring, and a cooling system for rapidly cooling the cured molding layer.

[0027] Before printing, 3D modeling is performed through CAD, solid works, CG or other software, and then the model is sliced ​​through slicing software, sliced ​​according to different materials, and then the sliced ​​file is imported into the 3D printing device 100. According to computer instructions, the powder supply device 40 opens the powder drop hole 41 under the action of the controller (not shown), and puts a certain amount of the first type of powder, the second type of powder and the third type of powder into the channel 101 corresponding to the powder spreading device 10. After the different types of powder pass through the channel 101, the powder falls on the support plate 321 in turn to complete the powder spreading. Then selective laser sintering is used for precise curing and molding to complete the first layer molding. The support plate 321 moves down by a slice thickness through the support member 322 and the cylinder 323, and the above process is repeated until the entire molded part is completed by superimposed printing.

[0028] The 3D printing device provided by the present invention has a simple structure and is easy to use. It is also provided with a plurality of closely adjacent and independently arranged channels, which can realize powder spreading of multiple materials on the same layer, and is conducive to the production of high-precision and complex product molding.

[0029] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention. As long as they are within the spirit of the present invention, appropriate changes and modifications to the above embodiments are within the scope of protection claimed by the present invention.

Claims

1. A 3D printing device, characterized in that: The invention comprises a powder spreading device, a powder supply device, a transmission mechanism, a molding component, a laser system for curing powder, and a controller. The powder spreading device is arranged between the powder supply device and the molding component. The powder spreading device is provided with a plurality of closely adjacent and independently arranged channels. One end of each channel faces the powder supply device and the other end faces the molding component. The cross section of the channel is circular with a diameter of 0.02 mm to 0.5 mm, and the wheelbase of adjacent channels is 0.1 mm to 1 mm. The powder spreading device and the powder supply device are respectively connected to the transmission mechanism to realize the movement of the powder spreading device and the powder supply device in a preset direction. The transmission mechanism comprises two slide rails and two motors. The powder supply device is slidably arranged on one of the slide rails, and the powder supply device is slidably arranged on the other slide rail, and the motor drives the powder spreading device and the powder supply device to slide on the corresponding slide rails respectively; the powder supply device is arranged above the powder spreading device, and is used to provide powder to the powder spreading device, and the powder supply device includes at least three powder supply boxes, and the types of powders in at least three of the powder supply boxes are different from each other. A plurality of powder falling holes are provided at the bottom of each of the powder supply boxes, and the powder falling holes are used to supply powder to the powder spreading device; the powder falling holes are connected to the controller, and the controller is used to control the opening of one or more of the powder falling holes so that the powder falls from the powder supply box into the corresponding channel.

2. The 3D printing device according to claim 1, characterized in that: The 3D printing device also includes a safety system for fault monitoring and a cooling system for rapidly cooling the solidified molding layer.

3. The 3D printing device according to claim 1, characterized in that: The powder supply device also includes a switch arranged at the bottom of each powder supply box, and the switch is a cover plate controlled by a micro motor, and the switch is used to open and close the corresponding powder drop hole.

4. The 3D printing device according to claim 3, characterized in that: The switches are connected to a controller, and the controller controls the opening and closing of the switches to enable the powder to fall from the powder supply box into the corresponding channels.

5. The 3D printing device according to claim 1, characterized in that: The cross section of the powder spreading device is one of circular, rectangular or polygonal.

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