Line stripping mechanism of laser curing 3D printer

Abstract

The invention provides a line stripping mechanism of a laser curing 3D printer. The line stripping mechanism comprises a 3D printer body, a forming part, a cutting part, a cold pasting separation part and an air drying mechanism. The forming part is arranged on the 3D printer body, the dividing part is arranged on the 3D printer body and located on the left side of the forming part, and the two cold pasting separation parts are arranged on the 3D printer body and located under the forming part. And the air drying mechanism is arranged on the 3D printer body and faces the forming part. The line stripping mechanism of the laser curing 3D printer is high in printed part separation efficiency and good in quality, no danger exists, meanwhile, the forming part and the printed part can be effectively prevented from being damaged, it can be ensured that the printed part is thoroughly detached, and residues are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing technology, and more specifically, to a wire stripping mechanism for a laser curing 3D printer. Background Art

[0002] The SLS 3D printer is an advanced three-dimensional printing technology based on the laser sintering technology. SLS is the abbreviation of Selective Laser Sintering, which means selective laser sintering.

[0003] The SLS 3D printer first lays a layer of powder material on the workbench, and then the laser emits a high-energy laser beam to melt and bond the powder material together to form a solid layer. Then, on the basis of this layer, another layer of powder material is laid again, and the laser emits a laser beam to melt and bond the powder material together to form another solid layer. This process is repeated until the entire three-dimensional entity is formed. The SLS 3D printer has the advantages of a wide range of printable materials, high printing accuracy, and good mechanical properties. It can not only print common materials such as plastics and metals, but also print high-difficulty materials such as ceramics and glass. The printing accuracy can reach the micron level, and the printed entity has excellent mechanical properties, which can be used to manufacture complex three-dimensional models, parts, etc.

[0004] In order to ensure that the first layer of the printed part has good adhesion strength and anti-warpage properties, the first layer of the printed part will have a large adhesive force and form a firm bond with the workbench. Especially when the printing material is plastic, this situation will be more serious. Therefore, removing the printed part from the workbench after printing is a difficult and dangerous process. The simplest method is to push, pull, and drag the printed part by brute force, but the biggest drawback of this method is that it is relatively dangerous. If the printed part suddenly loosens, it is very easy to cause the hand to hit the printer and get injured. Another method is to cut the printed part with a flat blade or a craft knife. This method is very likely to damage the printed part and cause it to be scrapped or scratch the workbench, thus affecting the adhesion of future prints. In addition, when removing the printed part with tools, it varies from operator to operator, and there are often residues on the workbench, which will affect the accuracy and quality of subsequent prints. Summary of the Invention

[0005] The purpose of the present invention is to provide a wire stripping mechanism for a laser curing 3D printer to solve the above problems.

[0006] To achieve the above purpose, the present invention provides a wire stripping mechanism for a laser curing 3D printer, including: a 3D printer body, a forming part, a dividing part, a cold sticking and separating part, and an air drying mechanism; The forming part is arranged on the 3D printer body, the dividing part is arranged on the 3D printer body and is located on the left side of the forming part, two groups of cold sticking and separating parts are arranged on the 3D printer body and are directly below the forming part, and the air drying mechanism is arranged on the 3D printer body and faces the forming part, where Drive the dividing part to wedge into the space between the forming part and the peripheral printed part and saw back and forth to generate frictional force to cut the bottom of the peripheral printed part; The cold sticking and separating part is adapted to rise and stick to the forming part to cool and shrink the forming part and the peripheral printed part; The air drying mechanism is adapted to blow the peripheral printed part to continuously cool the peripheral printed part; The forming part includes a workbench arranged on the 3D printer body, a supporting strip arranged on the side of the workbench, and an enclosing board placed on the supporting strip; The supporting strip is lower than the surface of the workbench.

[0007] Further, the dividing part includes a lower bottom plate, an electric cylinder, a right-angle supporting plate, a retracting mechanism and a wire; The two lower bottom plates are arranged on the 3D printer body at intervals, the two electric cylinders are respectively installed on the two lower bottom plates, the two right-angle supporting plates are respectively connected to the output ends of the two electric cylinders, the two groups of retracting mechanisms are respectively arranged on the two right-angle supporting plates, and the two ends of the wire are fixedly arranged on the two groups of retracting mechanisms; The wire is in a straightened state and is flush with the surface of the workbench.

[0008] Further, the retracting mechanism includes a fastening frame, an impact cylinder and an elbow transmission rod; A groove is formed on the right-angle supporting plate, the fastening frame is slidably installed on the right-angle supporting plate through the groove, the impact cylinder is arranged at a corner of the right-angle supporting plate, and the two ends of the elbow transmission rod are respectively connected to the output end of the impact cylinder and the fastening frame; The two ends of the wire are fixedly installed on the fastening frames of the two groups of retracting mechanisms.

[0009] Further, the cold sticking and separating part includes a hanging top plate, a hollow positioning frame, a box body, an electric push rod, a tray, an ice bag and a perforation; Two of the suspension plates are mounted on the 3D printer body, the hollow positioning frame is mounted on the two suspension plates, the box body is arranged inside the hollow positioning frame, the electric push rod is arranged on the 3D printer body and is located between the two suspension plates, and the output shaft of the electric push rod extends into the box body movably. The tray is mounted on the output shaft of the electric push rod, the ice bag is arranged on the tray, and the perforation is formed on the 3D printer body; The perforation, the workbench and the ice bag are collinear.

[0010] Furthermore, the cold sticker separation part further includes an outer pressing plate, a top cover and an arc spring; The outer pressing plate is arranged on the side surface of the box body, the top cover is hinged on the top of the box body and buckles on the box body, one ends of a plurality of the arc springs are mounted on the outer pressing plate at equal intervals, and the other ends of the plurality of the arc springs are connected to the top cover; Both the box body and the top cover are made of heat-insulating materials.

[0011] Furthermore, the air-drying mechanism includes two feet obliquely mounted on the 3D printer body, an outer frame mounted on the two feet, and a fan mounted inside the outer frame.

[0012] Furthermore, the workbench is made of thermosensitive material.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The wire stripping mechanism of the laser curing 3D printer can change its shape through the set forming part, so that it presents different states during and after printing, and further ensures that the printed part can be completely exposed after printing, facilitating the subsequent removal of the printed part from the 3D printer body; The wire stripping mechanism of the laser curing 3D printer can automatically penetrate between the printed part and the forming part after printing through the dividing part, and can perform sharp cutting in multiple directions on the joint between the printed part and the forming part, so as to ensure that the two are separated neatly and the printed part falls off the forming part as a whole; The wire stripping mechanism of the laser curing 3D printer can be lifted upward in a low-temperature state until it is closely attached to the forming part after printing through the cold sticker separation part, so that the forming part cools down rapidly, and relies on the forming part to transfer the low temperature to the bottom of the printed part, prompting the forming part and the printed part to contract simultaneously at different rates when they are cooled, so that the adhesion between the two is damaged, and then the printed part is directly separated from the forming part, or most of it is separated from the forming part, providing effective assistance for the dividing part; The wire stripping mechanism of this laser curing 3D printer has high efficiency and good quality in separating printed parts. It is not dangerous, can effectively avoid damage to the forming part and the printed part, and can ensure the complete removal of the printed part to avoid residues. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below in conjunction with the drawings and embodiments.

[0015] Figure 1 shows a perspective view of the present invention; Figure 2 shows a first partial perspective view of the present invention; Figure 3 shows a second partial perspective view of the present invention; Figure 4 shows a third partial perspective view of the present invention; Figure 5 shows a partial front view of the present invention; Figure 6 shows a partial bottom front view of the present invention; Figure 7 shows the present invention Figure 3 an enlarged view of part A; Figure 8 shows the present invention Figure 4 an enlarged view of part B.

[0016] In the figures, the same reference numerals denote the same structural elements, where: 1, 3D printer body; 2, forming part; 21, workbench; 22, carrier bar; 23, enclosure board; 3, dividing part; 31, lower base plate; 32, electric cylinder; 33, right-angled carrier plate; 34, return mechanism; 341, fastening frame; 342, impact cylinder; 343, elbow transmission rod; 35, metal wire; 4, cold sticker separation part; 41, hanging top plate; 42, hollow positioning frame; 43, box body; 431, outer abutting plate; 432, top cover; 433, arc spring; 44, electric push rod; 45, tray; 46, ice pack; 47, perforation; 5, air drying mechanism; 51, foot; 52, outer frame; 53, fan. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The present invention will now be described in further detail with reference to the drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present invention in a schematic manner, so they only show the components related to the present invention.

[0018] Please refer to Figure 1 , Figure 1 which shows a perspective view of the present invention; please refer to Figure 2 , Figure 2 which shows a first partial perspective view of the present invention; please refer toFigure 3 , Figure 3 shows the second partial perspective view of the present invention; please refer to Figure 4 , Figure 4 shows the third partial perspective view of the present invention; please refer to Figure 5 , Figure 5 shows the partial front view of the present invention; please refer to Figure 6 , Figure 6 shows the partial bottom front view of the present invention; please refer to Figure 7 , Figure 7 shows the present invention Figure 3 magnified view at A; please refer to Figure 8 , Figure 8 shows the present invention Figure 4 magnified view at B; as Figure 1-8 shown, a wire stripping mechanism of a laser curing 3D printer includes: a 3D printer body 1, a forming part 2, a dividing part 3, a cold sticking and separating part 4, and an air drying mechanism 5; The forming part 2 is arranged on the 3D printer body 1, the dividing part 3 is arranged on the 3D printer body 1 and is located on the left side of the forming part 2, two groups of the cold sticking and separating parts 4 are arranged on the 3D printer body 1 and are directly below the forming part 2, and the air drying mechanism 5 is arranged on the 3D printer body 1 and faces the forming part 2, wherein driving the dividing part 3 to be wedged between the forming part 2 and an external printed part and saw back and forth to generate frictional cutting on the bottom of the external printed part; the cold sticking and separating part 4 is adapted to rise and stick to the forming part 2 to cool and shrink the forming part 2 and the external printed part; The air-drying mechanism 5 is adapted to blow the peripheral printed parts to continuously cool the peripheral printed parts. The wire stripping mechanism of the laser curing 3D printer can change its shape through the set forming part 2, so that it presents different states during and after printing, and further ensures that the printed parts can be completely exposed after printing, facilitating the subsequent removal of the printed parts from the 3D printer body 1. Through the dividing part 3, it can automatically penetrate between the printed parts and the forming part 2 after printing, and can perform sharp cutting in multiple directions on the joint between the printed parts and the forming part 2, so as to ensure a clean separation of the two, and the printed parts fall off the forming part 2 as a whole. Through the cold paste separation part 4, it can be lifted upward in a low-temperature state until it is closely attached to the forming part 2 after printing, so that the forming part 2 can be quickly cooled down, and the low temperature is transmitted to the bottom of the printed parts by relying on the forming part 2, prompting the forming part 2 and the printed parts to shrink simultaneously at different rates after being cooled, so that the adhesion between the two is damaged, and then the printed parts are directly separated from the forming part 2, or most of them are separated from the forming part 2, providing effective assistance for the dividing part 3. The wire stripping mechanism of the laser curing 3D printer has high efficiency and good quality in separating the printed parts, has no danger, can effectively avoid damage to the forming part 2 and the printed parts, and can ensure the complete removal of the printed parts to avoid residues; The forming part 2 includes a workbench 21 arranged on the 3D printer body 1, a carrier bar 22 arranged on the side of the workbench 21, and an enclosure board 23 placed on the carrier bar 22. During printing, the powder spreading system on the 3D printer body 1 evenly spreads the powder material on the workbench 21, and then melts the flattened powder material. After the current layer is processed, the workbench 21 descends by a layer thickness distance driven by the lifting system on the 3D printer body 1. Subsequently, the powder spreading system on the 3D printer body 1 spreads the powder again, and repeats the cycle until the entire three-dimensional entity is stacked to obtain the final printed parts. After printing, the enclosure board 23 is removed, so that the printed parts can be completely exposed, facilitating the dividing part 3 to separate and remove them; The carrier bar 22 is lower than the surface of the workbench 21 to ensure that the carrier bar 22 does not hinder the movement of the dividing part 3.

[0019] Optionally, the dividing part 3 includes a lower bottom plate 31, an electric cylinder 32, a right-angle carrier plate 33, a retracting mechanism 34 and a wire 35; The two lower bottom plates 31 are arranged at intervals on the 3D printer body 1. The two electric cylinders 32 are respectively installed on the two lower bottom plates 31. The two right-angle carrier plates 33 are respectively connected to the output ends of the two electric cylinders 32. The two sets of return mechanisms 34 are respectively arranged on the two right-angle carrier plates 33. The two ends of the wire 35 are fixedly arranged on the two sets of return mechanisms 34. The wire 35 is in a straightened state and is flush with the surface of the workbench 21. After printing is completed, the two electric cylinders 32 are simultaneously driven to continuously push the two right-angle carrier plates 33 forward synchronously, so as to wedge the wire 35 between the surface of the workbench 21 and the bottom layer of the printed part and gradually move forward. By using the strong frictional force generated between the wire 35 and the bottom layer of the printed part, the bottom layer of the printed part is separated from the workbench 21 little by little. After the wire 35 completely passes through the printed part, it is ensured that all the parts where the printed part adheres to the workbench 21 are cut open, realizing the detachment of the printed part, and ensuring that the printed part is completely peeled off from the workbench 21. The electric cylinder 32 is a modular product integrating a servo motor and a lead screw, which converts the rotational motion of the servo motor into a linear motion and adopts closed-loop servo control with a control accuracy of up to 0.01 mm. Thus, the wire 35 is accurately pushed forward by the two electric cylinders 32 to ensure the accuracy of peeling the printed part.

[0020] Optionally, the return mechanism 34 includes a fastening frame 341, an impact cylinder 342 and an elbow transmission rod 343. A groove is formed on the right-angle carrier plate 33. The fastening frame 341 is slidably installed on the right-angle carrier plate 33 through the groove. The impact cylinder 342 is arranged at a corner of the right-angle carrier plate 33. The two ends of the elbow transmission rod 343 are respectively connected to the output end of the impact cylinder 342 and the fastening frame 341. The two ends of the wire 35 are fixedly installed on the fastening frames 341 of the two sets of return mechanisms 34. In the initial state, the two fastening frames 341 are respectively located at the head and tail ends of the grooves on the two right-angle carrier plates 33, ensuring that the two fastening frames 341 can move relative to each other. While the two electric cylinders 32 push the wire 35 forward, the two impact cylinders 342 are sequentially and regularly started. The corresponding fastening frame 341 is pulled relative to the other fastening frame 341 on the right-angle carrier plate 33 through the elbow transmission rod 343, so as to pull the wire 35 back and forth, and further make the wire 35 move back and forth in the vertical direction while moving forward, realizing multi-directional cutting of the bottom layer of the printed part, effectively improving the effect of cutting and separating the printed part, and ensuring that the printed part can be completely peeled off from the workbench 21.

[0021] Optionally, the cold patch separation part 4 includes a suspension top plate 41, a hollow positioning frame 42, a box body 43, an electric push rod 44, a tray 45, an ice pack 46, and a perforation 47; The two suspension top plates 41 are installed on the 3D printer body 1, the hollow positioning frame 42 is installed on the two suspension top plates 41, the box body 43 is arranged inside the hollow positioning frame 42, the electric push rod 44 is installed on the 3D printer body 1 and is located between the two suspension top plates 41, and the output shaft of the electric push rod 44 can movably extend into the box body 43. The tray 45 is installed on the output shaft of the electric push rod 44, the ice pack 46 is arranged on the tray 45, and the perforation 47 is opened on the 3D printer body 1; The perforation 47, the workbench 21, and the ice pack 46 are collinear. After the printing is completed and before the dividing part 3 operates to peel off the printed part, the electric push rod 44 is driven to push the tray 45 upward, so that it successively leaves the box body 43 and passes through the perforation 47 until the ice pack 46 is attached to the workbench 21, thereby using the low temperature of the ice pack 46 to rapidly cool the workbench 21 and the printed part, causing their temperatures to drop rapidly, and then causing the workbench 21 and the printed part to contract at different rates, destroying the adhesion between them. For some printed parts with weak adhesion, the separation of the printed part from the workbench 21 can be directly achieved, and for some printed parts with strong adhesion, it can also ensure that part or most of it is directly separated from the workbench 21, providing effective assistance for the subsequent dividing part 3 and ensuring that the printed part can be completely and thoroughly peeled off under multiple measures.

[0022] Optionally, the cold patch separation part 4 further includes an outer abutting plate 431, a top cover 432, and an arc spring 433; The outer abutting plate 431 is arranged on the side of the box body 43, the top cover 432 is hinged on the top of the box body 43 and buckles on the box body 43, one ends of several arc springs 433 are installed on the outer abutting plate 431 at equal intervals, and the other ends of several arc springs 433 are connected to the top cover 432; Both the box body 43 and the top cover 432 are made of heat-insulating materials. Normally, the top cover 432 buckles on the box body 43. When the electric push rod 44 pushes the ice pack 46 upward, the top cover 432 is pushed open, and at the same time, several arc springs 433 are compressed to ensure that the ice pack 46 can be smoothly pushed upward. After the ice pack 46 returns to the box body 43, several arc springs 433 rebound to buckle the top cover 432 back onto the box body 43, ensuring that the ice pack 46 is normally shielded by the box body 43 and the top cover 432, providing good heat insulation for the ice pack 46, preventing the ice pack 46 from melting too quickly and the temperature from rising, and further preventing the effect of the cold patch separation part 4 on the workbench 21 and the printed part from decreasing, resulting in the inability to contract at the normal rate or the need to frequently replace the ice pack 46.

[0023] Optionally, the air-drying mechanism 5 includes two feet 51 obliquely installed on the 3D printer body 1, an outer frame 52 installed on the two feet 51, and a fan 53 installed inside the outer frame 52. Before the cold sticker separating part 4 operates to stick the ice pack 46 on the workbench 21, the fan 53 is first started to blow air at the printed part to cool the printed part and the workbench 21. After the printed part and the workbench 21 are restored to room temperature, the ice pack 46 is then stuck on the workbench 21, avoiding the printed part and the workbench 21 from being affected by the low-temperature ice pack 46 in the high-temperature state just after printing and resulting in a sharp drop in temperature, thereby preventing damage such as cracking and deformation caused by excessive temperature difference between the inside and outside of the printed part and the workbench 21, and ensuring the peeling of the printed part is completed on the premise of stability, safety and no damage to the printed part and the workbench 21.

[0024] Optionally, the workbench 21 is made of a thermosensitive material, so that the workbench 21 is sensitive to temperature, so that it can shrink to a large extent when affected by the ice pack 46 and can efficiently transfer the low temperature to the printed part to also increase the shrinkage rate of the printed part, thereby effectively improving the effect of their automatic separation.

[0025] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A wire stripping mechanism for a laser curing 3D printer, characterized in that: include: A 3D printer body (1), a molding part (2), a splitting part (3), a cold paste separation part (4) and an air drying mechanism (5); The molding part (2) is arranged on the 3D printer body (1), the dividing part (3) is arranged on the 3D printer body (1) and is located on the left side of the molding part (2), two sets of cold paste separation parts (4) are arranged on the 3D printer body (1) and are located directly below the molding part (2), and the air drying mechanism (5) is arranged on the 3D printer body (1) and faces the molding part (2), wherein The dividing portion (3) is driven to wedge between the forming portion (2) and the external printed part and saw back and forth to generate friction to cut the bottom of the external printed part; The cold-sticking separation portion (4) is adapted to be attached to the molding portion (2) after rising, so that the molding portion (2) and the external printed part are cooled and contracted; The air-drying mechanism (5) is suitable for blowing the external printed part so as to continuously cool the external printed part; The molding part (2) comprises a workbench (21) arranged on the 3D printer body (1), a supporting bar (22) arranged on the side of the workbench (21), and a protective plate (23) placed on the supporting bar (22); The supporting bar (22) is lower than the surface of the workbench (21).

2. A wire stripping mechanism for a laser curing 3D printer as claimed in claim 1, characterized in that: The dividing portion (3) comprises a lower base plate (31), an electric cylinder (32), a right-angle supporting plate (33), a return mechanism (34) and a metal wire (35); The two lower bottom plates (31) are arranged at intervals on the 3D printer body (1); the two electric cylinders (32) are respectively mounted on the two lower bottom plates (31); the two right-angle supporting plates (33) are respectively connected to the output ends of the two electric cylinders (32); the two sets of return mechanisms (34) are respectively arranged on the two right-angle supporting plates (33); and the two ends of the metal wire (35) are fixedly arranged on the two sets of return mechanisms (34); The metal wire (35) is in a stretched state and is flush with the surface of the workbench (21).

3. A wire stripping mechanism for a laser curing 3D printer as claimed in claim 2, characterized in that: The return mechanism (34) comprises a fastening frame (341), an impact cylinder (342) and an elbow transmission rod (343); The right-angle supporting plate (33) is provided with a groove, the fastening frame (341) is slidably mounted on the right-angle supporting plate (33) through the groove, the impact cylinder (342) is arranged at a corner of the right-angle supporting plate (33), and the two ends of the elbow transmission rod (343) are respectively connected to the output end of the impact cylinder (342) and the fastening frame (341); Both ends of the metal wire (35) are fixedly mounted on the fastening frames (341) of the two sets of the return mechanisms (34).

4. A wire stripping mechanism for a laser curing 3D printer as claimed in claim 3, characterized in that: The cold sticker separation part (4) comprises a suspended top plate (41), a hollow positioning frame (42), a box body (43), an electric push rod (44), a tray (45), an ice bag (46) and a perforation (47); The two suspended ceiling plates (41) are mounted on the 3D printer body (1), the hollow positioning frame (42) is mounted on the two suspended ceiling plates (41), the box body (43) is arranged in the hollow positioning frame (42), the electric push rod (44) is arranged on the 3D printer body (1) and is located between the two suspended ceiling plates (41), and the output shaft of the electric push rod (44) can be movably extended into the box body (43), the tray (45) is mounted on the output shaft of the electric push rod (44), the ice bag (46) is arranged on the tray (45), and the through hole (47) is opened on the 3D printer body (1); The through hole (47), the workbench (21), and the ice bag (46) are colinear.

5. A wire stripping mechanism for a laser curing 3D printer as claimed in claim 4, characterized in that: The cold contact separation portion (4) further comprises an outer abutment plate (431), a top cover (432) and an arc spring (433); The outer abutment plate (431) is disposed on the side of the box body (43), the top cover (432) is hinged to the top of the box body (43) and buckled onto the box body (43), one end of a plurality of arc springs (433) is mounted on the outer abutment plate (431) at equal intervals, and the other ends of the plurality of arc springs (433) are connected to the top cover (432); The box body (43) and the top cover (432) are both made of heat-insulating materials.

6. A wire stripping mechanism for a laser curing 3D printer as claimed in claim 5, characterized in that: The air-drying mechanism (5) comprises two bases (51) obliquely mounted on the 3D printer body (1), an outer frame (52) mounted on the two bases (51), and a fan (53) mounted inside the outer frame (52).

7. A wire stripping mechanism for a laser curing 3D printer as claimed in claim 6, characterized in that: The workbench (21) is made of heat-sensitive material.

Images