Photosensitive resin additive 3D printer

Abstract

The invention provides a photosensitive resin additive 3D printer which comprises a machine shell, a raw material pool is arranged in the machine shell, a liquid draining pool is further arranged at the side end of the raw material pool, a water pump is arranged at the bottom of the liquid draining pool and connected with the liquid draining pool and the raw material pool, a lifting table and a first lifting mechanism are arranged at the bottom of the raw material pool, and a discharging assembly is further arranged on the first lifting mechanism. The discharging assembly is used for stripping a product fixed to the surface of the lifting table, the machine shell is further provided with the foam scraping assembly, the liquid draining pool is arranged, the printed product is stripped from the lifting table through the discharging assembly, the product is pushed into the liquid draining pool through the foam scraping assembly, and resin attached to the surface of the product is recycled; and the resin in the liquid draining pool is fed into the raw material pool through the water pump, so that the resin raw material is recycled.

Description

Technical Field

[0001] The present invention relates to a 3D printer, and in particular, to a photosensitive resin additive 3D printer. Background Art

[0002] An SLA printer is a 3D printer for stereolithography. It selectively irradiates the surface of a liquid photosensitive resin with ultraviolet light to cure and form it layer by layer.

[0003] Currently, Chinese Patent No. CN108556361A discloses a 3D printer with automatic material return based on SLA, including a box body. One side of the bottom of the inner wall of the box body is fixedly connected with a control box, and the bottom of the inner wall of the box body is fixedly connected with a raw material box. A two-position six-way electromagnetic directional control valve is arranged inside the raw material box. The electromagnetic directional control valve solves the problem of waste of the remaining liquid photosensitive resin and greatly reduces the production cost.

[0004] The above patent still has deficiencies. Currently, for the products formed by stereolithography, the formed products need to be lifted out of the resin pool through a lifting platform. At this time, the products are fixed on the lifting platform, and the products need to be shoveled off and transferred to an alcohol pool for cleaning to remove the resin on the surface of the products. The liquid resin has a certain viscosity. When the products are lifted out of the resin pool, some resin will adhere to the surface of the products. Resin dripping or resin adhering to other tools is likely to occur during shoveling out and transferring the products, and it is not easy to collect the resin, resulting in waste of resin raw materials. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a photosensitive resin additive 3D printer, which has the functions of a draining rod and resin collection.

[0006] To solve the above technical problems, the technical solution of the present invention is: a photosensitive resin additive 3D printer, including a machine shell. A raw material pool is arranged inside the machine shell. A laser emitter is arranged at the top of the raw material pool. A draining liquid pool is also arranged at the side end of the raw material pool. A water pump is arranged at the bottom of the draining liquid pool. The water pump connects the draining liquid pool and the raw material pool. A lifting platform and a first lifting mechanism are arranged at the bottom of the raw material pool. A net box and a second lifting mechanism are arranged at the bottom inside the draining liquid pool. A discharging assembly is also arranged on the first lifting mechanism. The discharging assembly is used to peel off the products fixed on the surface of the lifting platform. A bubble scraping assembly is also arranged on the machine shell. The bubble scraping assembly is used to remove the bubbles on the surface of the resin and push the products from the raw material pool into the draining liquid pool.

[0007] By the above technical means, by arranging a draining liquid pool, peeling off the printed products from the lifting platform through the discharging assembly, pushing the products into the net box of the draining liquid pool through the bubble scraping assembly, and recycling the resin adhering to the surface of the products, and sending the resin in the draining liquid pool into the raw material pool through the water pump, the recovery of resin raw materials is completed.

[0008] Preferably, the first lifting mechanism includes a first electric cylinder, the output end of the first electric cylinder is fixed to the bottom of the lifting table, the second lifting mechanism includes a second electric cylinder, and the second electric cylinder is inserted into the center of the net box to drive its lifting.

[0009] By the above technical means, the precise lifting of the lifting table is realized by the first electric cylinder, and the net box is driven to move up and down by setting the second electric cylinder, so as to facilitate the removal of the net box.

[0010] Preferably, the discharging assembly includes a discharging push rod, a discharging hole is formed in the lifting table, the discharging hole is countersunk, a top material head is arranged at the top of the discharging push rod and is slidably arranged in the discharging hole, the bottom of the discharging push rod exposes out of the bottom of the lifting table, when the lifting mechanism drives the lifting table to move to the bottommost part, the bottom of the discharging push rod abuts against the raw material pool, so that the top material head exposes out of the discharging hole.

[0011] By the above technical means, through the cooperation between the discharging push rod and the discharging hole, when the product printing is completed, the product is separated from the lifting table by the ejection of the discharging push rod, so as to achieve the purpose of automatic discharging.

[0012] Preferably, the discharging assembly further includes a discharging plate, the discharging plate is slidably arranged at the bottom of the lifting table, a spring cavity is formed in the discharging plate, a spring abutting ring is fixedly arranged on the discharging push rod, a first return spring is arranged on the upper side of the spring abutting ring, a second return spring is further sleeved on the output shaft of the first electric cylinder, the second return spring abuts against the discharging plate, and a return clamping block is further arranged on the side wall of the raw material pool, and the return clamping block is used for driving the discharging plate to move and retracting the top material head into the discharging hole.

[0013] By the above technical means, by setting the discharging plate, and making the discharging push rod flush with the table top of the lifting table through the first return spring and the second return spring, so that the discharging push rod can extend and retract, and by setting the return clamping block, the retraction of the top material head is realized, so as to prevent the product from sticking to the top material head and being unable to separate.

[0014] Preferably, clamping grooves are formed on both sides of the raw material pool, the return clamping block is hinged in the clamping groove, a first convex part and a second convex part are arranged on the outer side of the return clamping block, a third return spring is arranged between the inner side of the return clamping block and the clamping groove, and a through groove is arranged at the side end of the lifting table.

[0015] By the above technical means, by arranging the through groove at the side end of the lifting table and arranging the first convex part and the second convex part on the outer side of the return clamping block, the lifting table can directly pass through the first convex part and stop the discharging plate, so as to achieve the purpose of retracting the top material head, and by abutting against the second convex part to retract the first convex part, the first convex part is reset after the top material head is retracted.

[0016] Preferably, the bubble scraping assembly includes a lead screw motor, a sliding block, and a scraping plate. The lead screw motor is fixedly arranged inside the machine shell. The sliding block is in threaded cooperation with the lead screw motor. The scraping plate is fixed to the bottom of the sliding block, and an inclined guide surface is further provided on the scraping plate.

[0017] By the above technical means, the sliding block is driven to move by the lead screw motor, so that the scraping plate translates along the top surface of the raw material, achieving the purpose of scraping bubbles. At the same time, the product can be driven to move. By setting the inclined guide surface, the waste remaining on the lifting platform can be removed, increasing the yield rate of the product.

[0018] Preferably, a countersunk sliding hole is provided in the sliding block. A convex head stud is arranged at the top of the scraping plate. The convex head stud is slidably arranged in the countersunk sliding hole. When the lifting platform moves upward, the scraping plate is driven to move upward.

[0019] By the above technical means, by setting the countersunk sliding hole, when the lifting platform moves upward, the scraping plate can be driven to move upward, so as to ensure that the scraping plate can push the product on the lifting platform into the net box. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of the embodiment; Figure 2 is a schematic cross-sectional view of the embodiment; Figure 3 is Figure 2 a schematic view of part A of Figure 4 is a schematic structural diagram of the discharging assembly in the normal state; Figure 5 is a schematic structural diagram of the discharging assembly in the retracted state; Figure 6 is Figure 2 a schematic view of part B of Figure 7 is a partial cross-sectional view of the bubble scraping assembly.

[0021] Reference numerals: 1. Machine shell; 2. Raw material pool; 3. Liquid draining pool; 4. Water pump; 5. Lifting platform; 6. Lifting mechanism one; 7. Net box; 8. Lifting mechanism two; 9. Discharging assembly; 10. Bubble scraping assembly; 11. Electric cylinder one; 12. Electric cylinder two; 13. Discharging push rod; 14. Discharging hole; 15. Discharging plate; 16. Spring cavity; 17. Spring abutting ring; 18. First return spring; 19. Second return spring; 20. Reset catch; 21. Card slot; 22. First convex portion; 23. Second convex portion; 24. Third return spring; 25. Through slot; 26. Lead screw motor; 27. Sliding block; 28. Scraping plate; 29. Inclined guide surface; 30. Countersunk sliding hole; 31. Convex head stud. Detailed Embodiments

[0022] The following further details the specific embodiments of the present invention in conjunction with the accompanying drawings, so that the technical solutions of the present invention are easier to understand and master.

[0023] A photosensitive resin additive 3D printer, as Figure 1 , Figure 2 shown, includes a casing 1. Inside the casing 1, there is a raw material pool 2. At the top of the raw material pool 2, there is a laser emitter. On the side of the raw material pool 2, there is also a liquid drainage pool 3. At the bottom of the liquid drainage pool 3, there is a water pump 4. The water pump 4 is connected to the liquid drainage pool 3 and the raw material pool 2. At the bottom of the raw material pool 2, there is a lifting platform 5 and a first lifting mechanism 6. At the bottom of the liquid drainage pool 3, there is a wire mesh box 7 and a second lifting mechanism 8. The wire mesh box 7 is cylindrical. Liquid resin can leak out from the holes of the wire mesh box 7 and enter the liquid drainage pool 3, thus completing the recycling of the resin raw material. The water pump 4 sends the resin in the liquid drainage pool 3 into the raw material pool 2. On the first lifting mechanism 6, there is also a unloading component 9. The unloading component 9 is used to peel off the product fixed on the surface of the lifting platform 5. On the casing 1, there is also a bubble scraping component 10. The bubble scraping component 10 is used to remove the bubbles on the surface of the resin and push the product from the raw material pool 2 into the liquid drainage pool 3.

[0024] The first lifting mechanism 6 includes an electric cylinder 11. The output end of the electric cylinder 11 is fixed to the bottom of the lifting platform 5 to achieve precise lifting of the lifting platform 5. The second lifting mechanism 8 includes an electric cylinder 12. The electric cylinder 12 is fixedly inserted into the center of the wire mesh box 7. The electric cylinder 12 and the wire mesh box 7 are connected by means of key insertion. When the liquid filtration is completed, the wire mesh box 7 can be directly taken out and unloaded, which is more convenient.

[0025] As Figure 3 shown, the unloading component 9 includes an unloading push rod 13. There is an unloading hole 14 on the lifting platform 5. The unloading hole 14 is countersunk. At the top of the unloading push rod 13, there is a top material head and it is slidably arranged in the unloading hole 14. The bottom of the unloading push rod 13 exposes at the bottom of the lifting platform 5. When the lifting mechanism drives the lifting platform 5 to move to the bottommost position, the bottom of the unloading push rod 13 abuts against the raw material pool 2, so that the top material head exposes from the unloading hole 14. When the product printing is completed, the product is separated from the lifting platform 5 by the pushing of the unloading push rod 13, thus achieving the purpose of automatic unloading.

[0026] Just separating the product from the lifting platform 5 is not enough to make the product separate from the unloading push rod 13. Therefore, the unloading component 9 also includes an unloading plate 15, as Figure 4 , Figure 5 , Figure 6As shown, the discharge plate 15 is slidably arranged at the bottom of the lifting table 5. A spring cavity 16 is formed in the discharge plate 15. A spring abutment ring 17 is fixedly arranged on the discharge push rod 13. A first return spring 18 is arranged on the upper side of the spring abutment ring 17. A second return spring 19 is also sleeved on the output shaft of the electric cylinder 11. The second return spring 19 abuts against the discharge plate 15. The spring cavity 16 is in a round hole shape and is provided with a plug for sealing and abutting against the spring abutment ring 17. By arranging the first return spring 18, the spring abutment ring 17 can be tightly abutted against the plug, ensuring that the discharge push rod 13 is flush with the lifting table 5. The first return spring 18 can ensure that the discharge push rod 13 automatically retracts after being ejected. A reset catch 20 is also arranged on the side wall of the raw material pool 2. The reset catch 20 is used to drive the discharge plate 15 to move and retract the ejector head into the discharge hole 14.

[0027] Slots 21 are formed on both sides of the raw material pool 2. The reset catch 20 is hingedly arranged in the slot 21. A first protrusion 22 and a second protrusion 23 are arranged on the outer side of the reset catch 20. A third return spring 24 is arranged between the inner side of the reset catch 20 and the slot 21. An access slot 25 is arranged at the side end of the lifting table 5. When the lifting table 5 and the discharge plate 15 pass by the first protrusion 22, by arranging the access slot 25 on the lifting table 5, when the lifting table 5 passes by the first protrusion 22, the discharge plate 15 is stuck at the first protrusion 22. At this time, the second return spring 19 is compressed, the discharge push rod 13 retracts, and the product is separated from the discharge push rod 13. Continuing to move the lifting table 5, the lifting table 5 abuts against the second protrusion 23 and presses the reset catch 20 into the slot 21. At this time, the first protrusion 22 rotates inward and disengages the discharge plate 15 from the clamped state. At this time, the second return spring 19 releases its elastic force, causing the lifting table 5 and the discharge plate 15 to fit together again and pass by the second protrusion 23 together, so as to achieve the purpose of the discharge push rod 13 retracting after being ejected.

[0028] As Figure 2 、 Figure 7As shown in the figure, the bubble scraping assembly 10 includes a lead screw motor 26, a sliding block 27 and a scraper 28. The lead screw motor 26 is fixedly arranged inside the machine shell 1. The sliding block 27 is in threaded cooperation with the lead screw motor 26. The scraper 28 is fixed to the bottom of the sliding block 27. An inclined guide surface 29 is further provided on the scraper 28. A countersunk sliding hole 30 is formed in the sliding block 27. A convex head stud 31 is arranged at the top of the scraper 28. The convex head stud 31 is slidably arranged in the countersunk sliding hole 30. When the lifting table 5 moves upward, it drives the scraper 28 to move upward. The sliding block 27 is driven by the lead screw motor 26 to move, so that the scraper 28 translates along the top surface of the raw material, achieving the purpose of scraping bubbles. At the same time, the product can be driven to move. By providing the inclined guide surface 29, the waste remaining on the lifting table 5 is removed, increasing the qualified rate of the product. A partition is arranged between the liquid draining pool 3 and the raw material pool 2. The liquid level of the resin raw material is lower than the partition to prevent the resin raw material from directly entering the liquid draining pool 3. By providing the countersunk sliding hole 30, when the lifting table 5 moves upward, it can drive the scraper 28 to move upward, so as to ensure that the scraper 28 can push the product on the lifting table 5 into the net box 7.

[0029] Of course, the above are only typical examples of the present invention. In addition, the present invention can also have many other specific implementation manners. Any technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection required by the present invention.

Claims

1. A photosensitive resin additive 3D printer, comprising a machine case (1), a raw material pool (2) is arranged inside the machine case (1), and a laser emitter is arranged at the top of the raw material pool (2), and the characteristics are as follows: A draining liquid pool (3) is also arranged at the side end of the raw material pool (2). A water pump (4) is arranged at the bottom of the draining liquid pool (3). The water pump (4) is connected to the draining liquid pool (3) and the raw material pool (2). A lifting platform (5) and a first lifting mechanism (6) are arranged at the bottom of the raw material pool (2). A mesh box (7) and a second lifting mechanism (8) are arranged at the inner bottom of the draining liquid pool (3). A discharging assembly (9) is further arranged on the first lifting mechanism (6). The discharging assembly (9) is used for peeling off the products fixed on the surface of the lifting platform (5). A bubble scraping assembly (10) is also arranged on the machine shell (1). The bubble scraping assembly (10) is used for removing the bubbles on the surface of the resin and pushing the products from the raw material pool (2) into the draining liquid pool (3).

2. The photosensitive resin additive 3D printer according to claim 1, characterized in that: The first lifting mechanism (6) includes a first electric cylinder (11). The output end of the first electric cylinder (11) is fixed to the bottom of the lifting platform (5). The second lifting mechanism (8) includes a second electric cylinder (12). The second electric cylinder (12) is inserted into the center of the mesh box (7) to drive its lifting.

3. The photosensitive resin additive 3D printer according to claim 2, characterized in that: The discharging assembly (9) includes a discharging push rod (13). A discharging hole (14) is formed in the lifting platform (5). The discharging hole (14) is in a countersunk head shape. A material pushing head is arranged at the top of the discharging push rod (13) and is slidably arranged in the discharging hole (14). The bottom of the discharging push rod (13) exposes out of the bottom of the lifting platform (5). When the lifting mechanism drives the lifting platform (5) to move to the bottommost position, the bottom of the discharging push rod (13) abuts against the raw material pool (2), so that the material pushing head exposes out of the discharging hole (14).

4. The photosensitive resin additive 3D printer according to claim 3, characterized in that: The discharging assembly (9) further includes a discharging plate (15). The discharging plate (15) is slidably arranged at the bottom of the lifting platform (5). A spring cavity (16) is formed in the discharging plate (15). A spring abutting ring (17) is fixedly arranged on the discharging push rod (13). A first return spring (18) is arranged on the upper side of the spring abutting ring (17). A second return spring (19) is also sleeved on the output shaft of the first electric cylinder (11). The second return spring (19) abuts against the discharging plate (15). A return clamping block (20) is further arranged on the side wall of the raw material pool (2). The return clamping block (20) is used for driving the discharging plate (15) to move and making the material pushing head retract into the discharging hole (14).

5. The photosensitive resin additive 3D printer according to claim 4, characterized in that: Slots (21) are formed on both sides of the raw material pool (2). The return clamping block (20) is hinged in the slots (21). A first convex part (22) and a second convex part (23) are arranged on the outer side of the return clamping block (20). A third return spring (24) is arranged between the inner side of the return clamping block (20) and the slots (21). A through slot (25) is arranged at the side end of the lifting platform (5).

6. The photosensitive resin additive 3D printer according to claim 1, wherein: The bubble scraping assembly (10) includes a lead screw motor (26), a sliding block (27) and a scraping plate (28). The lead screw motor (26) is fixedly arranged inside the machine shell (1). The sliding block (27) is in threaded cooperation with the lead screw motor (26). The scraping plate (28) is fixed to the bottom of the sliding block (27). An inclined guide surface (29) is further formed on the scraping plate (28).

7. A photosensitive resin additive 3D printer according to claim 6, characterized in that: A countersunk sliding hole (30) is formed in the sliding block (27), a convex head ejector pin (31) is arranged at the top of the scraping plate (28), the convex head ejector pin (31) is slidably arranged in the countersunk sliding hole (30), and when the lifting table (5) moves upward, the scraping plate (28) is driven to move upward.

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