A resin powder precision supply device

Abstract

The present application discloses a resin powder precision supply device, which relates to the field of feeding technology, and includes a chassis, and also includes a silo installed in the chassis, a first vibrating part, a hopper, a feeding plate, a second vibrating part, a first weighing part, a drop hopper, a moving mechanism, a tray, and a second weighing part. The present application utilizes the first vibrating part to drive the silo to vibrate, and the resin powder in the silo is transported from the discharge end to the hopper, the second vibrating part drives the feeding plate to vibrate, and the feeding plate transports the resin powder in the hopper from the discharge end to the drop hopper, and the moving mechanism drives the drop hopper to move downward, reducing the height difference between the discharge port of the drop hopper and the tray, so that the resin powder falls into the tray and is not easy to bounce out of the tray, and the moving mechanism drives the drop hopper to reciprocate on the horizontal plane, so that the resin powder can be evenly scattered in the tray, and the second weighing part measures the weight of the resin powder contained in the tray, thereby improving the supply accuracy of the resin powder.

Description

Technical Field

[0001] The present application relates to the field of material feeding technology, and in particular to a resin powder precision feeding device. Background Art

[0002] Resin powder used for semiconductor packaging is a high-performance material with good mechanical properties, chemical stability and electrical properties. It can effectively improve the heat dissipation and electrical properties of packaged devices, while enhancing vibration resistance, moisture resistance, etc. It is an important material in the field of semiconductor packaging.

[0003] Referring to the patent document with publication number CN107914355A, a resin material supply device includes an original supply part, an original supply part excitation part, a resin material holding part, an excitation part, a metering part, a groove, a tray and a moving mechanism. The resin powder is stored in the original supply part. The original supply part excitation part drives the original supply part to vibrate, so that the resin powder in the original supply part is transported to the resin material holding part. The excitation part drives the resin material holding part and the groove to vibrate, so that the resin powder is transported on the groove and sprinkled into the tray from the discharge end of the groove. The moving mechanism drives the tray to move in the horizontal direction, so that the resin powder can be evenly sprinkled in the tray. The metering part is installed below the resin material holding part and measures the weight of the resin material holding part and the groove, so that the resin powder supply amount is more accurate.

[0004] When the resin powder is scattered from the discharge end of the trough into the tray, some dust will fly in the air, and a small amount of resin powder will fall into the tray and bounce out of the tray, making the weight of the resin powder in the tray slightly less than the measured weight of the metering part, resulting in poor feeding accuracy of the resin powder. Summary of the invention

[0005] In order to improve the supply accuracy of resin powder, the present application provides a resin powder precision supply device.

[0006] The present application provides a resin powder precision supply device adopts the following technical solution:

[0007] A resin powder precision feeding device comprises a chassis and a silo, which is arranged in the chassis and is used to store resin powder; a first vibrating part, which is arranged in the chassis and is used to drive the silo to vibrate and convey resin powder; a hopper, which is arranged in the chassis and is located below the discharge end of the silo; a feeding plate, which is arranged below the hopper, and a feeding trough is formed in the feeding plate; a second vibrating part, which is arranged below the feeding plate, is used to drive the feeding plate to vibrate and convey resin powder; a first weighing part, which is arranged in the chassis and is located below the second vibrating part, and is used to weigh the weight of the resin powder conveyed by the feeding plate; a drop hopper, which is arranged in the chassis and is located below the discharge end of the feeding plate, the top end of the drop hopper is opened, and the bottom end of the drop hopper is formed with a discharge port; a moving mechanism, which is arranged in the chassis and is used to drive the drop hopper to move freely in any direction in three-dimensional space; a tray, which is arranged in the chassis and is located below the discharge port of the drop hopper; a second weighing part, which is arranged in the chassis and connected to the tray, and is used to weigh the weight of the resin powder contained in the tray.

[0008] By adopting the above technical solution, the first vibrating part drives the silo to vibrate, and the resin powder in the silo is transported from the discharge end to the hopper, the second vibrating part drives the feeding plate to vibrate, and the feeding plate transports the resin powder in the hopper from the discharge end to the drop hopper, and the moving mechanism drives the drop hopper to move downward, thereby reducing the height difference between the discharge port of the drop hopper and the tray, so that after the resin powder falls into the tray, it is not easy to bounce out of the tray, and the moving mechanism drives the drop hopper to move back and forth on the horizontal plane, so that the resin powder can be evenly scattered in the tray. At the same time, the second weighing part measures the weight of the resin powder in the tray, thereby further improving the supply accuracy of the resin powder.

[0009] Preferably, the moving mechanism includes an X-axis moving part, a Y-axis moving part and a Z-axis moving part, the X-axis moving part is fixedly arranged in the chassis, the Y-axis moving part is arranged at the translation end of the X-axis moving part, the Z-axis moving part is arranged at the translation end of the Y-axis moving part, and the dropping hopper is arranged at the lifting end of the Y-axis moving part.

[0010] By adopting the above technical solution, the Z-axis moving part can drive the dropping hopper to move up and down, and the cooperation of the X-axis moving part and the Y-axis moving part can drive the dropping hopper to move freely on the horizontal plane through the Z-axis moving part, thereby realizing the free movement of the dropping hopper in any direction in three-dimensional space.

[0011] Preferably, the length of the top opening end of the hopper is greater than the length of the inner cavity of the tray, the width of the top opening end of the hopper is greater than the width of the inner cavity of the tray, the discharge port is located at the center of the hopper, and the discharge end of the feed plate is located directly above the center of the tray.

[0012] By adopting the above technical solution, the length and width of the opening at the top of the hopper are greater than the length and width of the inner cavity of the tray, and the discharge end of the feed plate is located directly above the center of the tray, and the opening end of the hopper is located in the middle of its bottom end, so that when the hopper moves to receive materials, the opening end of the hopper can move to cover the inner cavity of the tray, so that the resin powder is spread all over the tray.

[0013] Preferably, a telescopic member is provided in the chassis, a material receiving box is provided at the telescopic end of the telescopic member, the telescopic member drives the material receiving box to move in a horizontal direction, and the material receiving box is located between the drop hopper and the tray.

[0014] By adopting the above technical solution, when a specified amount of resin powder is poured into the tray, the second vibrator stops vibrating, the telescopic part extends and drives the receiving box to move to the bottom of the opening end of the hopper. At this time, the receiving box can receive the residual resin powder in the hopper, thereby making the weight of the resin powder poured into the tray more accurate.

[0015] Preferably, the hopper is located at its own discharge port and is rotatably provided with a discharge block, a discharge hole is opened on the bottom wall of the discharge block, the discharge hole is a waist-shaped hole, a discharge cavity connecting the inner cavity of the hopper and the discharge hole is formed in the discharge block, a gear ring groove is opened on the outer wall of the discharge block, a first gear is rotatably provided on the outer wall of the hopper located at the discharge port, one side of the first gear passes through the hopper and meshes with the gear ring groove, a driving screw is fixedly provided at the bottom end of the Z-axis moving part, a second gear is rotatably provided on the bottom of the outer wall of the hopper, the driving screw penetrates the hopper and threads through the second gear, a transmission mechanism is provided on the outer wall of the hopper, and the transmission mechanism transmits and connects the first gear and the second gear.

[0016] By adopting the above technical scheme, the resin powder in the hopper can be discharged from the waist-shaped discharge hole through the discharge cavity. When the Z-axis moving part drives the hopper to move up and down, the hopper drives the second gear to move up and down on the driving screw, and the driving screw drives the second gear to rotate. The second gear drives the first gear to rotate through the transmission mechanism, and the first gear can drive the discharge block to rotate through the gear ring groove; when the hopper moves along the length direction of the tray, the length direction of the discharge hole is parallel to the width direction of the tray. When the hopper moves along the width direction of the tray, the Z-axis moving part drives the hopper to move up, and the discharge block rotates 90°, so that the length direction of the discharge hole is parallel to the length direction of the tray, thereby facilitating more even sprinkling of the resin powder in the tray.

[0017] Preferably, the transmission mechanism includes a transmission shaft, a transmission bevel gear and a bevel gear group, the transmission shaft is rotatably arranged at the bottom of the outer side wall of the hopper, the transmission bevel gear is arranged at one end of the transmission shaft and meshes with the second gear, and the bevel gear group is arranged at the other end of the transmission shaft and is transmission-connected to the first gear.

[0018] By adopting the above technical solution, the second gear drives the transmission shaft to rotate through the transmission bevel gear, and the transmission shaft drives the first gear to rotate through the bevel gear set, thereby being able to transmit and connect the first gear and the second gear.

[0019] Preferably, the dropping hopper is located at the inner side of the discharge port and is rotatably provided with a first gear ring, a non-return portion connected to the first gear ring is provided in the dropping hopper, a second gear ring is fixedly provided on the outer wall of the discharge block, the top teeth of the first gear ring are meshed with the bottom teeth of the second gear ring, a retaining ring is fixedly provided on the inner wall of the dropping hopper at the top of the discharge port, the outer wall of the retaining ring abuts against the top of the inner wall of the discharge block, a first elastic member is provided on the outside of the retaining ring, the top end of the first elastic member abuts against the inner wall of the dropping hopper, and the bottom end abuts against the top wall of the discharge block, when the dropping hopper moves downward, the discharge block drives the first gear ring to rotate through the second gear ring, and when the dropping hopper moves upward, the non-return portion locks the first gear ring, and the second gear ring continuously rises and falls under the action of the first elastic member during rotation.

[0020] By adopting the above technical solution, when the Z-axis moving part drives the drop hopper to move upward and the discharge block rotates 90°, the check part locks the first gear ring, and during the process of the discharge block driving the second gear ring to rotate, the tooth body of the second gear ring gradually separates from the tooth body of the first gear ring, and the second gear ring drives the discharge block to move upward to squeeze the first elastic member. When the tooth body of the second gear ring is completely separated from the tooth body of the first gear ring, the first elastic member pushes the second gear ring to move downward through the discharge block and meshes with the first gear ring again. In this way, during the process of the discharge block rotating 90°, the second gear ring will drive the discharge block to move up and down continuously and have a vibration effect, thereby reducing the blockage of resin powder in the discharge hole.

[0021] Preferably, the anti-return part includes a ratchet, a plurality of pawls and a second elastic member, the ratchet is fixedly arranged on the outer wall of the first gear ring, the plurality of pawls are rotatably arranged in the dropping hopper and are equidistantly spaced along the circumference of the ratchet, and the plurality of second elastic members are arranged at the connection between the plurality of pawls and the dropping hopper, when the dropping hopper moves upward, the second elastic member drives the pawls to engage the ratchet, and when the dropping hopper moves downward, the ratchet rotates past the pawls.

[0022] By adopting the above technical solution, when the dropping hopper moves downward, the second gear ring drives the first gear ring to rotate, and the first gear ring drives the ratchet to rotate. The ratchet wheel rotates through the pawl. When the dropping hopper moves upward, the second elastic member drives the pawl to engage the ratchet wheel, so that the first gear ring cannot rotate, thereby preventing the first gear ring from rotating, so that the first gear ring can only rotate in one direction.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. Using the drop hopper and the second weighing part, the first vibrating part drives the hopper to vibrate, and the resin powder in the hopper is transported from the discharge end to the hopper. The second vibrating part drives the feeding plate to vibrate, and the feeding plate transports the resin powder in the hopper from the discharge end to the drop hopper. The moving mechanism drives the drop hopper to move downward, reducing the height difference between the discharge port of the drop hopper and the tray, so that the resin powder is not easy to bounce out of the tray after falling into the tray. The moving mechanism drives the drop hopper to move back and forth on the horizontal plane, so that the resin powder can be evenly scattered in the tray. At the same time, the second weighing part measures the weight of the resin powder in the tray, thereby further improving the supply accuracy of the resin powder;

[0025] 2. With the help of the material receiving box, when a specified amount of resin powder is poured into the tray, the second vibrator stops vibrating, the telescopic part extends and drives the material receiving box to move below the opening end of the hopper. At this time, the material receiving box can receive the residual resin powder in the hopper, so that the weight of the resin powder poured into the tray is more accurate;

[0026] 3. Through the discharge block, the resin powder in the hopper can be discharged from the waist-shaped discharge hole through the discharge cavity. When the Z-axis moving part drives the hopper to move up and down, the hopper drives the second gear to move up and down on the driving screw, and the driving screw drives the second gear to rotate. The second gear drives the first gear to rotate through the transmission mechanism, and the first gear can drive the discharge block to rotate through the gear ring groove; when the hopper moves along the length direction of the tray, the length direction of the discharge hole is parallel to the width direction of the tray. When the hopper moves along the width direction of the tray, the Z-axis moving part drives the hopper to move up, and the discharge block rotates 90°, so that the length direction of the discharge hole is parallel to the length direction of the tray, so as to facilitate the resin powder to be more evenly scattered in the tray. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the overall structure of the resin powder precision supply device in Example 1 of the present application;

[0028] Figure 2 This is a front view of the overall structure of the resin powder precision supply device in Example 1 of the present application;

[0029] Figure 3 It is a partial structural front view of the resin powder precision supply device in Example 1 of the present application;

[0030] Figure 4 This is a partial structural schematic diagram of the resin powder precision supply device in Example 2 of the present application;

[0031] Figure 5 This is a partial structural cross-sectional view of the resin powder precision supply device in Example 2 of the present application;

[0032] Figure 6 It is an exploded cross-sectional view of a part of the structure of the resin powder precision supply device in Example 2 of the present application;

[0033] Figure 7 This is a partial structural cross-sectional view of the resin powder precision supply device in Example 2 of the present application;

[0034] Figure 8 For this application Figure 5 Enlarged schematic diagram at point A in the middle.

[0035] Figure numerals: 1, chassis; 101, first box body; 102, second box body; 2, silo; 3, first vibrating part; 4, hopper; 5, feeding plate; 6, second vibrating part; 7, first weighing part; 8, drop hopper; 9, moving mechanism; 91, X-axis moving part; 92, Y-axis moving part; 93, Z-axis moving part; 10, tray; 11, second weighing part; 12, telescopic member; 13, receiving box; 14, discharge block ; 15. discharge hole; 16. discharge cavity; 17. gear ring groove; 18. first gear; 19. drive screw; 20. second gear; 21. transmission mechanism; 211. transmission shaft; 212. transmission bevel gear; 213. bevel gear set; 22. first gear ring; 23. check part; 231. ratchet; 232. pawl; 233. second elastic member; 24. second gear ring; 25. retaining ring; 26. first elastic member. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-Figure 8 This application is described in further detail.

[0037] The embodiment of the present application discloses a resin powder precision supply device.

[0038] Embodiment 1:

[0039] Reference Figure 1 , Figure 2 and Figure 3 A resin powder precision feeding device includes a chassis 1, and also includes four groups of silos 2, a first vibrating part 3, a hopper 4, a feeding plate 5, a second vibrating part 6, a first weighing part 7, a drop hopper 8, a moving mechanism 9, a tray 10 and a second weighing part 11 installed in the chassis 1. The chassis 1 includes a first box body 101 and two second boxes 102, and the two second boxes 102 are fixedly connected to both sides of the first box body 101 in the horizontal direction.

[0040] The first vibrating part 3 is fixedly installed in the second box body 102 through a plurality of springs, the silo 2 is fixedly installed at the top of the first vibrating part 3, the discharge end of the silo 2 is located at a side close to the first box body 101, and the resin powder is stored in the silo 2. The first vibrating part 3 drives the silo 2 to vibrate, so that the resin powder in the silo 2 can be discharged from the discharge end of the silo 2.

[0041] The first weighing part 7 is fixedly mounted in the second box 102 and is located on the side of the first vibrating part 3 close to the first box 101. The second vibrating part 6 is fixedly mounted on the top of the first weighing part 7 through a plurality of springs. The feeding plate 5 is fixedly mounted on the top of the second vibrating part 6. The hopper 4 is fixedly mounted on one end of the top wall of the feeding plate 5 close to the first vibrating part 3, and the hopper 4 is located directly below the discharge end of the silo 2. A feeding trough is formed in the feeding plate 5 along its length direction. The hopper 4 is connected to the feeding trough. The end of the feeding plate 5 away from the hopper 4 passes through the second box 102 and extends into the first box 101. The discharge end of the feeding plate 5 is located at the end of the feeding plate 5 away from the hopper 4.

[0042] The resin powder discharged from the discharge end of the silo 2 falls into the hopper 4, and the second vibrating part 6 drives the feed plate 5 and the hopper 4 to vibrate. The resin powder in the hopper 4 first enters the feed slot of the feed plate 5, and then passes through the feed slot and is discharged from the discharge end of the end of the feed plate 5. The first weighing part 7 measures the weight of the resin powder discharged from the feed plate 5.

[0043] The moving mechanism 9 is installed in the first box body 101 and is located above the discharge end of the feeding plate 5. The moving mechanism 9 includes an X-axis moving part 91, a Y-axis moving part 92 and two Z-axis moving parts 93. The X-axis moving part 91 is fixedly installed in the first box body 101, the Y-axis moving part 92 is installed at the translation end of the X-axis moving part 91, and the two Z-axis moving parts 93 are installed at the translation end of the Y-axis moving part 92. The drop hopper 8 is fixedly installed at the lifting end of the two Z-axis moving parts 93 and is located below the discharge end of the feeding plate 5. In the present application, the X-axis moving part 91 and the Y-axis moving part 92 can be selected as linear modules, and the Z-axis moving part 93 can be selected as a cylinder.

[0044] The resin powder discharged from the discharge end of the feeding plate 5 falls into the hopper 4, and the X-axis moving part 91 and the Y-axis moving part 92 drive the hopper 8 to move freely in the horizontal direction, and the Z-axis moving part 93 drives the hopper 8 to move up and down, thereby being able to drive the hopper 8 to move freely in any direction in three-dimensional space.

[0045] The second weighing part 11 is fixedly installed in the first box body 101, the tray 10 is placed on the second weighing part 11 and is located below the hopper 8, and the discharge end of the feeding plate 5 is located just above the center of the tray 10. The length of the top opening end of the hopper 8 is greater than the length of the inner cavity of the tray 10, and the width of the top opening end of the hopper 8 is greater than the width of the inner cavity of the tray 10. The bottoms of the side walls around the hopper 8 are inclined toward each other, and a discharge port is formed at the bottom end of the side walls around the hopper 8, and the discharge port is located at the center of the hopper 8.

[0046] The resin powder in the hopper 8 is discharged from the discharge port at the bottom thereof onto the tray 10. The hopper 8 moves downward so that the height difference between the discharge port thereof and the tray 10 is lower, so that after the resin powder falls into the tray 10, it is not easy to bounce out of the tray 10. The hopper 8 can move freely in the horizontal direction so that the resin powder can be spread all over the tray 10, and the second weighing unit 11 measures the weight of the resin powder contained in the tray 10, thereby improving the supply accuracy of the resin powder.

[0047] At the same time, a micro-vibrator is installed on the outer wall of the drop hopper 8. In the present application, the micro-vibrator can be selected as a vibration motor. The micro-vibrator drives the drop hopper 8 to vibrate, so that the resin powder slides along the inclined peripheral wall of the drop hopper 8, and the use of the micro-vibrator can prevent the resin powder from adhering to the inner wall of the drop hopper 8.

[0048] A telescopic member 12 is fixedly installed in the second box body 102 through a bracket, and a receiving box 13 is slidably installed in the first box body 101 between the drop hopper 8 and the tray 10 in the horizontal direction. The telescopic end of the telescopic member 12 passes through the second box body 102 and is fixedly connected to the receiving box 13. In the present application, the telescopic member 12 can be selected as a cylinder. When a specified amount of resin powder is poured into the tray 10, the second vibrator stops vibrating, the telescopic member 12 extends and drives the receiving box 13 to move to the bottom of the open end of the drop hopper 8. At this time, the receiving box 13 can receive the residual resin powder in the drop hopper 8, so that the weight of the resin powder poured into the tray 10 is more accurate.

[0049] The implementation principle of a resin powder precision supply device in Example 1 of the present application is as follows: when supplying resin powder, the first vibrating part 3 drives the silo 2 to vibrate, and the resin powder in the silo 2 falls from the discharge end into the hopper 4, and the second vibrating part 6 drives the feeding plate 5 to vibrate, and the feeding plate 5 transports the resin powder in the hopper 4 from the discharge end to the drop hopper 8, and the moving mechanism 9 first drives the drop hopper 8 to move downward, thereby reducing the height difference between the discharge port of the drop hopper 8 and the tray 10, so that after the resin powder falls into the tray 10, it is not easy to bounce out of the tray 10, and the moving mechanism 9 then drives the drop hopper 8 to move back and forth on the horizontal plane, so that the resin powder can be evenly scattered in the tray 10, and the second weighing part 11 measures the weight of the resin powder contained in the tray 10, thereby improving the supply accuracy of the resin powder.

[0050] Embodiment 2:

[0051] Reference Figure 4 , Figure 5 and Figure 6The difference between this embodiment and the first embodiment is that the discharge port of the hopper 8 is a circular hole, the hopper 8 is rotatably mounted with a cylindrical discharge block 14 in the discharge port, a funnel-shaped discharge cavity 16 with an opening at the top is formed in the discharge hopper 4, a discharge hole 15 connected to the bottom end of the discharge cavity 16 is formed on the bottom wall of the discharge block 14, and the discharge hole 15 is a waist-shaped hole. The resin powder in the hopper 8 first enters the discharge cavity 16 of the discharge block 14, and then discharges from the hopper 8 from the discharge hole 15 at the bottom of the discharge block 14.

[0052] A driving screw 19 is fixedly installed at the bottom end of a Z-axis moving part 93, and a second gear 20 is rotatably installed at the bottom of the outer wall of the hopper 8. The driving screw 19 passes through the hopper 8, and the driving screw 19 passes through the second gear 20 through a thread, and the second gear 20 is fixedly installed at the bottom end of the driving screw 19. A first gear 18 is rotatably installed on the outer wall of the hopper 8 at its own discharge port through a mounting block, and a gear ring groove 17 is opened on the outer wall of the discharge block 14. The first gear 18 passes through the hopper 8 and meshes with the gear ring groove 17, and the depth of the gear ring groove 17 is greater than the thickness of the first gear 18. A transmission mechanism 21 is installed at the bottom of the hopper 8, and the transmission mechanism 21 transmits and connects the first gear 18 and the second gear 20.

[0053] When the hopper 8 moves up and down, the hopper 8 drives the second gear 20 to move up and down on the driving screw 19, and the driving screw 19 drives the second gear 20 to rotate. The second gear 20 drives the first gear 18 to rotate through the transmission mechanism 21, and the first gear 18 drives the discharge block 14 to rotate in the discharge port of the hopper 8 through the gear ring groove 17.

[0054] The transmission mechanism 21 includes a transmission shaft 211, a transmission bevel gear 212 and a bevel gear set 213. The transmission shaft 211 is rotatably mounted on the bottom of the outer wall of the hopper 8 through two mounting blocks. The transmission bevel gear 212 is fixedly mounted on the top of the transmission shaft 211, and the transmission bevel gear 212 is meshed with the second gear 20. The bevel gear set 213 is composed of two bevel gear sets 213, one bevel gear is fixedly mounted on the end of the transmission shaft 211 away from the transmission bevel gear 212, and the other bevel gear is coaxially fixedly mounted on the first gear 18, and the two bevel gears are meshed with each other. When the second gear 20 rotates, the transmission shaft 211 is driven to rotate through the transmission bevel gear 212, and the transmission shaft 211 then drives the first gear 18 to rotate through the bevel gear set 213.

[0055] In the present application, the Z-axis moving part 93 can be selected as a double-stroke cylinder. When the lifting end of the Z-axis moving part 93 moves downward to the first stroke, the Z-axis moving part 93 drives the drop hopper 8 to descend to the bottom. At this time, the length direction of the discharge hole 15 is parallel to the width direction of the tray 10, and the drop hopper 8 moves along the length direction of the tray 10. When the drop hopper 8 moves along the width direction of the tray 10, the lifting end of the Z-axis moving part 93 moves upward to the second stroke. At this time, the discharge block 14 rotates 90°, and the length direction of the discharge hole 15 is parallel to the length direction of the tray 10, so that the resin powder can be more evenly scattered in the tray 10.

[0056] Reference Figure 5 , Figure 7 and Figure 8 A second gear ring 24 is fixedly mounted on the outer wall of the discharge block 14 and below the gear ring groove 17, and a first gear ring 22 is rotatably mounted on the inner wall of the discharge port of the discharge hopper 8. The cross-sections of the top teeth of the first gear ring 22 and the bottom teeth of the second gear ring 24 are both right-angled triangles, and the teeth at the bottom of the second gear ring 24 mesh with the teeth at the top of the first gear ring 22. A check portion 23 connected to the first gear ring 22 is installed in the discharge hopper 8, and the check portion 23 is used to limit the first gear ring 22 so that the first gear ring 22 can only rotate in one direction.

[0057] A retaining ring 25 is fixedly installed on the top of the inner side wall of the discharge port of the drop hopper 8, and a plurality of first elastic members 26 are installed on the outer side of the retaining ring 25, and the plurality of first elastic members 26 are arranged at equal intervals along the circumference of the retaining ring 25. The top of the discharge block 14 is slidably sleeved on the outer side of the retaining ring 25, and the top of the discharge block 14 abuts the bottom end of the first elastic member 26, and the top of the first elastic member 26 abuts the retaining ring 25. In the present application, the first elastic member 26 can be selected as a spring. The retaining ring 25 blocks the gap between the top of the discharge block 14 and the drop hopper 8, so that the resin powder is not easy to enter the gap.

[0058] When the hopper 8 moves downward, the discharging block 14 drives the second gear ring 24 to rotate. At this time, the check part 23 does not check the first gear ring 22, and the second gear ring 24 can drive the first gear ring 22 to rotate. When the hopper 8 moves upward, the check part 23 checks the first gear ring 22, so that the first gear ring 22 cannot rotate. During the process of the discharging block 14 driving the second gear ring 24 to rotate, the teeth of the second gear ring 24 gradually separate from the teeth of the first gear ring 22. During this process, the second gear ring 24 drives the discharging block 14 to move upward and squeeze the first elastic member 26. When the teeth of the second gear ring 24 are completely separated from the teeth of the first gear ring 22, the first elastic member 26 pushes the second gear ring 24 to move downward through the discharging block 14 and meshes with the first gear ring 22 again. Thus, when the hopper 8 moves upward, the first elastic member 26 cooperates with the first gear ring 22 so that the second gear ring 24 drives the discharge block 14 to continuously move up and down and vibrate, thereby reducing the blockage of the resin powder in the discharge hole 15.

[0059] The non-return portion 23 includes a ratchet 231, a plurality of ratchet pawls 232, and a second elastic member 233. The ratchet 231 is fixedly mounted on the outer wall of the first gear ring 22. The plurality of ratchet pawls 232 are rotatably mounted in the discharge port of the drop hopper 8. The plurality of ratchet pawls 232 are evenly spaced along the circumference of the ratchet 231 and are distributed on the outer side of the ratchet 231. The plurality of second elastic members 233 are mounted at the rotational connection between the plurality of ratchet pawls 232 and the drop hopper 8. In the present application, the second elastic member 233 can be a torsion spring.

[0060] The second elastic member 233 drives the pawl 232 to rotate and fit the ratchet 231. When the hopper 8 moves downward, the second gear ring 24 drives the first gear ring 22 to rotate, and the gear ring drives the ratchet 231 to rotate. The ratchet 231 rotates past the pawl 232, so that the first gear ring 22 will not be stopped. When the hopper 8 moves upward, the second elastic member 233 drives the pawl 232 to engage the ratchet 231, so that the first gear ring 22 cannot rotate, so that the first gear ring 22 can be stopped, so that the first gear ring 22 can only rotate in one direction.

[0061] The implementation principle of Example 2 of the present application is as follows: when the lifting end of the Z-axis moving part 93 moves downward to the first stroke, the Z-axis moving part 93 drives the hopper 8 to descend to the lowest position, at which time the length direction of the discharge hole 15 is parallel to the width direction of the tray 10, and the hopper 8 moves along the length direction of the tray 10. When the hopper 8 moves along the width direction of the tray 10, the lifting end of the Z-axis moving part 93 moves upward to the second stroke, at which time the discharge block 14 rotates 90°, and the length direction of the discharge hole 15 is parallel to the length direction of the tray 10, so as to facilitate the resin powder to be more evenly scattered in the tray 10. When the hopper 8 moves downward, the discharge block 14 drives the second gear ring 24 to rotate, at which time the check portion 23 does not check the first gear ring 22, and the second gear ring 24 can drive the first gear ring 22 to rotate. When the drop hopper 8 moves upward, the check portion 23 checks the first gear ring 22, so that the first gear ring 22 cannot rotate. During the process of the discharging block 14 driving the second gear ring 24 to rotate, the tooth body of the second gear ring 24 gradually separates from the tooth body of the first gear ring 22. During this process, the second gear ring 24 drives the discharging block 14 to move upward and squeeze the first elastic member 26. When the tooth body of the second gear ring 24 is completely separated from the tooth body of the first gear ring 22, the first elastic member 26 pushes the second gear ring 24 to move downward through the discharging block 14 and meshes with the first gear ring 22 again. In this way, when the drop hopper 8 moves upward, the first elastic member 26 cooperates with the first gear ring 22, so that the second gear ring 24 drives the discharging block 14 to move up and down continuously and has a vibration effect, thereby reducing the blockage of the resin powder in the discharging hole 15.

[0062] The above are only optional embodiments of the present disclosure and are not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A resin powder precision feeding device, characterized in that: The invention comprises a chassis (1), and further comprises A silo (2), arranged in the housing (1), for storing resin powder; A first vibration part (3) is arranged in the chassis (1) and is used to drive the silo (2) to vibrate and transport the resin powder; A hopper (4) is arranged in the chassis (1) and is located below the discharge end of the silo (2); A feeding plate (5) is arranged below the hopper (4), and a feeding trough is formed in the feeding plate (5); A second vibration part (6) is arranged below the feeding plate (5) and is used to drive the feeding plate (5) to vibrate and transport the resin powder; A first weighing unit (7) is arranged in the housing (1) and below the second vibrating unit (6), and is used to weigh the weight of the resin powder transported by the feeding plate (5); A material drop hopper (8) is arranged in the chassis (1) and is located below the discharge end of the feeding plate (5), the top end of the material drop hopper (8) is open, and the bottom end of the material drop hopper (8) is formed with a discharge port; A moving mechanism (9) is arranged in the chassis (1) and is used to drive the drop hopper (8) to move freely in any direction in a three-dimensional space; A tray (10) is arranged in the chassis (1) and is located below the discharge port of the hopper (8); A second weighing unit (11) is arranged in the housing (1) and connected to the tray (10), and is used to weigh the weight of the resin powder contained in the tray (10); The moving mechanism (9) comprises an X-axis moving part (91), a Y-axis moving part (92) and a Z-axis moving part (93); the X-axis moving part (91) is fixedly arranged in the chassis (1); the Y-axis moving part (92) is arranged at the translation end of the X-axis moving part (91); the Z-axis moving part (93) is arranged at the translation end of the Y-axis moving part (92); and the drop hopper (8) is arranged at the lifting end of the Y-axis moving part (92); The drop hopper (8) is located in its own discharge port and is rotatably provided with a discharge block (14); a discharge hole (15) is provided on the bottom wall of the discharge block (14); the discharge hole (15) is a waist-shaped hole; a discharge cavity (16) is formed in the discharge block (14) and is connected to the inner cavity of the drop hopper (8) and the discharge hole (15); a gear ring groove (17) is provided on the outer wall of the discharge block (14); a first gear (18) is rotatably provided on the outer wall of the drop hopper (8) at the discharge port; the first gear One side of the Z-axis moving part (93) passes through the hopper (8) and meshes with the gear ring groove (17); a driving screw (19) is fixedly provided at the bottom end of the Z-axis moving part (93); a second gear (20) is rotatably provided at the bottom of the outer wall of the hopper (8); the driving screw (19) penetrates the hopper (8) and is threaded through the second gear (20); a transmission mechanism (21) is provided on the outer wall of the hopper (8); the transmission mechanism (21) is connected to the first gear (18) and the second gear (20); The drop hopper (8) is rotatably provided with a first gear ring (22) located on the inner side of the discharge port, and a check portion (23) connected to the first gear ring (22) is provided inside the drop hopper (8). A second gear ring (24) is fixedly provided on the outer side wall of the discharge block (14), and the top teeth of the first gear ring (22) are meshed with the bottom teeth of the second gear ring (24). The inner side wall of the drop hopper (8) is fixedly provided with a retaining ring (25) located at the top end of the discharge port, and the outer side wall of the retaining ring (25) abuts against the inner side of the discharge block (14). The top of the wall is provided with a first elastic member (26) on the outside of the retaining ring (25), the top of the first elastic member (26) abuts against the inner wall of the drop hopper (8), and the bottom of the first elastic member (26) abuts against the top wall of the discharge block (14). When the drop hopper (8) moves downward, the discharge block (14) drives the first gear ring (22) to rotate through the second gear ring (24). When the drop hopper (8) moves upward, the check portion (23) locks the first gear ring (22). During the rotation of the second gear ring (24), the second gear ring (24) continuously moves up and down under the action of the first elastic member (26).

2. A resin powder precision feeding device according to claim 1, characterized in that: The length of the top opening end of the drop hopper (8) is greater than the length of the inner cavity of the tray (10), the width of the top opening end of the drop hopper (8) is greater than the width of the inner cavity of the tray (10), the discharge port is located at the center of the drop hopper (8), and the discharge end of the feeding plate (5) is located directly above the center of the tray (10).

3. The resin powder precision feeding device according to claim 1, characterized in that: A telescopic member (12) is provided in the chassis (1), a material receiving box (13) is provided at the telescopic end of the telescopic member (12), the telescopic member (12) drives the material receiving box (13) to move in a horizontal direction, and the material receiving box (13) is located between the drop hopper (8) and the tray (10).

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