Aluminum powder screening and feeding system and method for acrylic plate casting production

Abstract

The invention relates to the technical field of aluminum powder screening and feeding, and proposes an aluminum powder screening and feeding system and method for acrylic plate casting production, which completely utilizes wind power to screen aluminum powder, has better aluminum powder screening accuracy, wider screening range, more flexible adjustability in the screening process, better practicality, better isolation of the aluminum powder screening environment relative to the outside world, can effectively reduce the self-oxidation reaction in the aluminum powder screening process, has a higher recycling rate of inert gas, and can further reduce the screening cost. The system comprises a main body box, a circulation screening device and a main body bracket, and the circulation screening device comprises an annular cylinder, which is fixedly connected to the main body bracket, a barrier block is fixedly connected in the annular cylinder, an outer row cutting pipe, a supply cutting pipe and a discharge cutting pipe are connected to the annular cylinder, the barrier block is located in the annular cylinder between the outer row cutting pipe and the supply cutting pipe, and a circulation pump is installed between the outer row cutting pipe and the supply cutting pipe, and the supply cutting pipe is connected to a gas filling pipe.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum powder screening and feeding, and in particular to an aluminum powder screening and feeding system and method for acrylic plate casting production. Background Art

[0002] As we all know, acrylic is a commonly used thermoplastic with the characteristics of high transparency, easy processing and light weight. In the production process of acrylic, aluminum powder is sometimes added, which is mainly to improve its performance or appearance to expand its application range. However, the aluminum powder and acrylic sheet are more of a physical mixture. In order to ensure the screening and uniform distribution of aluminum powder during the casting process of acrylic sheet, we propose an aluminum powder screening and feeding system and method for acrylic sheet casting production.

[0003] After searching, the Chinese patent publication number CN114535041B and the patent publication number CN115608611A respectively disclose an aluminum powder screening device and method for aluminum powder production and an efficient aluminum powder screening device based on wind vibration phenomenon. The former is roughly described as comprising a main body box, four legs are fixed on the lower side of the main body box, a screening box is distributed in an annular manner in the main body box, a feeding barrel with openings at both ends is concentrically distributed in the main body box, a feeding impeller is concentrically arranged in the feeding barrel, a first filter is arranged on the lower side of the screening box, and a second filter is arranged on the upper side of the screening box. When in use, after multiple cycles of screening, aluminum powders of different specifications are screened. The two screens are separated for reasonable use according to demand, wherein the latter is roughly described as comprising a hollow rectangular box, an air inlet duct, an air outlet duct and a material inlet, wherein a first screen and a second screen are arranged in the rectangular box, and the first screen is driven to vibrate and screen the aluminum powder through a wind vibration mechanism, and the wind vibration mechanism comprises: a fixed angle block, a resonance rod and a resonance rod connector, wherein when in use, the input wind of the air inlet duct causes the resonance rod to vibrate, thereby driving the first screen to vibrate, and at the same time, the input wind can also lift up the aluminum powder accumulated on the first screen, and efficient aluminum powder screening is achieved under the joint action of the input wind and the first screen, and the second screen is connected to the first screen through a transmission rod to achieve vibration.

[0004] Although the above two sets of existing technical solutions can both realize the screening of aluminum powder, on the one hand, both of them are filtered through a "net", so generally speaking, the filtering accuracy is limited. At the same time, considering the active characteristics of aluminum powder, in order to ensure the characteristics of aluminum powder itself, it is necessary to keep the aluminum powder screening environment isolated from the outside air under special circumstances to reduce the reaction between the aluminum powder and oxygen in the air during the screening process. In the aforementioned screening process, the effective control of the aluminum powder screening environment is relatively weak, and its practicality needs to be further strengthened. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides an aluminum powder screening and feeding system and method for acrylic plate casting production, which completely utilizes wind power to screen aluminum powder, has better aluminum powder screening accuracy, a wider screening range, more flexible adjustability during the screening process, better practicality, and better isolation of the aluminum powder screening environment relative to the outside world, which can effectively reduce the self-oxidation reaction of the aluminum powder screening process. At the same time, the recycling rate of the inert gas is higher, and the screening cost can be further reduced.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an aluminum powder screening and feeding system for acrylic plate casting production, comprising a main body box, a circulating screening device and a main body bracket, the circulating screening device comprising an annular cylinder, the annular cylinder is fixedly connected to the main body bracket, a blocking block is fixedly connected inside the annular cylinder, an outer row cutting pipe, an inlet cutting pipe and a discharge cutting pipe are connected to the annular cylinder, the blocking block is located in the annular cylinder between the outer row cutting pipe and the inlet cutting pipe, and a circulating pump is installed between the outer row cutting pipe and the inlet cutting pipe, the The supply cutting pipe is connected to an air filling pipe, a solenoid valve is installed on the air filling pipe, a cylindrical expansion section is provided on the annular cylinder, a rotating material lifting structure is installed on the cylindrical expansion section, a servo motor is installed on the side of the annular cylinder, the servo motor is used for driving the operation of the rotating material lifting structure, the main body box is fixedly connected to the main body bracket, the main body box is connected to a feeding pipe, a recessed arc strip hole is opened on the main body box, a sealing ring plate is fixedly connected to the recessed arc strip hole, and the recessed arc strip hole and the sealing ring plate are matched with the rotating material lifting structure.

[0007] Preferably, the rotating material lifting structure includes a rotating inner cylinder and a material taking outer cylinder, the rotating inner cylinder is rotatably connected to the cylindrical outer expansion section, and a plurality of material lifting guide cylinders and a plurality of material discharge guide cylinders are fixedly connected to the rotating inner cylinder, the plurality of material lifting guide cylinders are respectively and alternately arranged with the plurality of material discharge guide cylinders, the plurality of material lifting guide cylinders and the plurality of material discharge guide cylinders are all connected with the rotating inner cylinder, the material taking outer cylinder is provided with a plurality of material taking troughs, the plurality of material taking troughs are respectively connected with the plurality of material lifting guide cylinders, a rotating seal is provided between the material taking outer cylinder and the sealing ring plate, the cylindrical outer expansion section is provided with an upper feed arc hole and a lower material withdrawal arc hole, and the plurality of material discharge guide cylinders are equipped with a sealing discharge assembly.

[0008] Preferably, the sealing discharge assembly includes an inner rotating ring and an outer rotating ring, the plurality of discharge guide cylinders are fixedly connected to the inner rotating ring, the outer rotating ring is rotatably connected to the inner rotating ring, the outer rotating ring and the inner rotating ring cooperate to form an annular recovery chamber, the plurality of discharge guide cylinders are connected to the annular recovery chamber, the outer rotating ring is fixedly connected to the main body bracket, and the outer rotating ring is fixedly connected to an outer discharge inclined tube connected to the annular recovery chamber.

[0009] Preferably, a driving gear is installed on the output shaft of the servo motor, the driving gear is meshed with a transmission gear, and the transmission gear is fixedly connected to the transfer inner cylinder.

[0010] Preferably, multiple material feeding troughs are rotatably connected with a toggle arc plate, and multiple toggle arc plates are fixedly connected with elastic tension springs, multiple elastic tension springs are respectively fixedly connected in multiple material feeding troughs, a permanent magnet bar is fixedly connected in the main body box, multiple toggle arc plates are fixedly connected with iron blocks, and multiple iron blocks can be magnetically attracted by the permanent magnet bar.

[0011] Preferably, the discharge cutting pipe is connected to a temporary storage box, the temporary storage box is connected to an upward pipe, and a feeding conveyor belt is installed in the upward pipe.

[0012] Preferably, the feeding conveyor belt includes an inner frame and two outer slides, the two outer slides are slidably connected to the upper lifting tube, the two outer slides are fixedly connected to a cylinder frame, the two cylinder frames are fixedly connected to the inner frame, a driving pulley and a driven pulley are rotatably connected in the inner frame, and a feeding belt is transmission-connected between the driving pulley and the driven pulley, a frequency conversion motor is installed on one of the two outer slides, and a shaft pulley is rotatably connected in the inner frame, and the frequency conversion motor is used for driving the shaft pulley to rotate, a synchronous pulley is installed on the driving pulley, and a synchronous belt is transmission-connected between the synchronous pulley and the shaft pulley, and an electric telescopic rod is installed at the bottom end of the upper lifting tube, and the electric telescopic rod is used for synchronous movement driving of the two outer slides.

[0013] Preferably, a synchronous frame is fixedly connected between the two outer slides, the telescopic rod of the electric telescopic rod is connected to the synchronous frame, two side bar holes are opened on the upper lifting tube, the two side bar holes are respectively matched with two cylindrical frames, a guide sealing rail is fixedly connected to the outside of the upper lifting tube, and the two outer slides are respectively slidably connected in the two guide sealing rails.

[0014] Preferably, the discharge cutting pipe is connected to the lowest position of the annular cylinder, the bottom end of the main box is fixedly connected to a bottom bracket, the bottom bracket is fixedly connected to the main bracket, and the outer rotating ring is fixedly connected to the bottom bracket through a side bracket.

[0015] A method for screening and feeding aluminum powder for acrylic plate casting production comprises the following steps:

[0016] S1. When in use, firstly, the discharge cutting pipe is connected to the acrylic preparation equipment, and the electromagnetic valve is connected to the inert gas supply equipment. When the electromagnetic valve is opened, the inert gas output by the external inert gas supply equipment will be guided into the annular cylinder through the electromagnetic valve, the gas adding pipe and the supply cutting pipe in sequence, and then the aluminum powder to be screened is added to the main box through the feeding pipe. In the process of adding the aluminum powder, the contact between the aluminum powder and the oxygen in the outside air is minimized to reduce the oxidation of the aluminum powder. After the aluminum powder is added, the top of the feeding pipe is immediately blocked to reduce the outside air from entering the main box;

[0017] S2. Turn on the power of the circulation pump. The circulation pump works to extract the inert gas in the annular cylinder through the outer discharge cut pipe, and then feed the extracted inert gas into the annular cylinder again through the supply cut pipe, so that the inert gas has a certain flow kinetic energy when passing through the outer expansion section of the cylinder. Turn on the power supply of the servo motor, and the servo motor is powered on. The powered servo motor realizes the operation of the rotating material lifting structure, and the rotating material lifting structure is operated to transfer the aluminum powder in the main box to the outer expansion section of the cylinder.

[0018] S3. The aluminum powder entering the outer expansion section of the cylinder will pass through the outer expansion section of the cylinder from top to bottom under the action of its own gravity. The aluminum powder passing through the outer expansion section of the cylinder will be screened under the action of the inert gas passing through the outer expansion section of the cylinder. The aluminum powder flowing with the inert gas will be guided by the annular cylinder and enter the bottom of the annular cylinder. Finally, it will be output through the discharge cutting tube, that is, the screened aluminum powder will be sent to the acrylic preparation equipment;

[0019] S4. During the aluminum powder screening process, the aluminum powder that is screened without the inert gas flowing through the outer expansion section of the cylinder will fall back into the rotating material lifting structure under the action of its own gravity to be collected and recovered for subsequent processing. In addition, during the screening process, the kinetic energy of the inert gas passing through the outer expansion section of the cylinder can be controlled by controlling the operation of the circulating pump according to actual use needs, and finally the screening control of different particle sizes of aluminum powder can be achieved.

[0020] Compared with the prior art, the present invention provides an aluminum powder screening and feeding system and method for acrylic plate casting production, which has the following beneficial effects:

[0021] In the present invention, through the design of the circulating screening device and the structure for forming the aluminum powder screening, the wind power is fully utilized to screen the aluminum powder, the aluminum powder screening accuracy is better, the screening range is wider, the adjustability during the screening process is more flexible, and at the same time, the recycling rate of the inert gas is higher, and the screening cost can be further reduced.

[0022] In the present invention, through the design of a rotating material lifting structure, a matching circulating screening device is formed to form a functional component for continuous feeding, which ensures the continuous screening of aluminum powder while making the aluminum powder screening environment better isolated from the outside world, can effectively reduce the self-oxidation reaction of the aluminum powder during the screening process, and has better practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0024] Figure 2 For the present invention Figure 1 A schematic diagram of the local enlarged structure at point A in the middle;

[0025] Figure 3 It is a partially cutaway three-dimensional structural schematic diagram of the cooperation of the material taking outer cylinder, the material lifting guide cylinder and the shifting arc plate of the present invention;

[0026] Figure 4 For the present invention Figure 3 A schematic diagram of the local enlarged structure at B in the middle;

[0027] Figure 5 It is a partially cutaway three-dimensional structural schematic diagram of the matching of the discharge guide cylinder and the inner rotating ring of the present invention;

[0028] Figure 6 It is a schematic diagram of the three-dimensional structure of the main box, feeding pipe and sealing ring plate of the present invention;

[0029] Figure 7 It is a schematic diagram of a partially cutaway three-dimensional structure of the annular cylinder, the blocking block and the outer row cutting tubes of the present invention;

[0030] Figure 8 For the present invention Figure 7 A schematic diagram of the local enlarged structure at C in the middle;

[0031] Fig. 9 It is a schematic diagram of the three-dimensional structure of the outer slide frame, the cylinder frame and the driving pulley of the present invention;

[0032] Fig.10 It is a structural schematic diagram of another angle of the present invention as a whole;

[0033] Fig.11 For the present invention Fig.10 A schematic diagram of the local enlarged structure at D in the middle;

[0034] Fig.12 It is a three-dimensional structural schematic diagram of another angle of the cooperation of the outer slide frame, the cylinder frame and the driving pulley of the present invention;

[0035] Fig.13 It is a schematic diagram of a partially cutaway three-dimensional structure of the annular cylinder, the blocking block and the discharge cutting tube of the present invention;

[0036] Fig.14 It is a schematic diagram of the overall three-dimensional structure of the present invention when viewed from above;

[0037] Fig.15 For the present invention Fig.14 A schematic diagram of the local enlarged structure at E in the middle;

[0038] Fig.16 It is a schematic diagram of the three-dimensional structure of the rotary inner cylinder, the discharge guide cylinder and the inner rotating ring of the present invention;

[0039] Fig.17 It is a schematic diagram of the exploded three-dimensional structure of the shaft pulley, synchronous pulley and synchronous belt of the present invention.

[0040] In the figure: 1, main box; 2, main bracket; 3, annular cylinder; 4, barrier block; 5, outer row cutting pipe; 6, feed cutting pipe; 7, discharge cutting pipe; 8, circulation pump; 9, gas pipe; 10, solenoid valve; 11, cylinder outer expansion section; 12, servo motor; 13, feeding pipe; 14, concave arc strip hole; 15, sealing ring plate; 16, rotating inner cylinder; 17, material taking outer cylinder; 18, lifting guide cylinder; 19, discharge guide cylinder; 20, material taking trough; 21, upper feeding arc hole; 22, lower material withdrawal arc hole; 23, inner rotating ring; 24, outer rotating ring; 25 , outer row of oblique pipes; 26, driving gear; 27, transmission gear; 28, toggle arc plate; 29, elastic tension spring; 30, permanent magnetic strip; 31, iron block; 32, temporary storage box; 33, lifting tube; 34, inner frame; 35, outer slide frame; 36, cylinder frame; 37, driving pulley; 38, driven pulley; 39, feeding belt; 40, frequency conversion motor; 41, shaft pulley; 42, synchronous pulley; 43, synchronous belt; 44, electric telescopic rod; 45, synchronous frame; 46, side bar hole; 47, guide sealing track; 48, bottom bracket; 49, side bracket. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] For examples, see Figure 1-Figure 17, an aluminum powder screening and feeding system for acrylic plate casting production, including a main body box 1, a circulation screening device and a main body bracket 2, the circulation screening device includes an annular cylinder 3, the annular cylinder 3 is fixedly connected to the main body bracket 2, a barrier block 4 is fixedly connected to the annular cylinder 3, an outer row cutting pipe 5, a supply cutting pipe 6 and a discharge cutting pipe 7 are connected to the annular cylinder 3, the barrier block 4 is located in the annular cylinder 3 between the outer row cutting pipe 5 and the supply cutting pipe 6, and a circulation pump 8 is installed between the outer row cutting pipe 5 and the supply cutting pipe 6, the supply cutting pipe 6 is connected to the gas filling pipe 9, the gas filling pipe 9 is installed with a solenoid valve 10, and a cylindrical outer expansion section 11 is provided on the annular cylinder 3. Through the design of the circulation screening device, a structure for aluminum powder screening is formed, which completely utilizes wind power to form aluminum powder screening, aluminum The powder screening accuracy is better, the screening range is wider, the adjustability in the screening process is more flexible, and the recycling rate of inert gas is higher, and the screening cost can be further reduced. A rotating material lifting structure is installed on the outer expansion section 11 of the cylinder, and a servo motor 12 is installed on the side of the annular cylinder 3. The servo motor 12 is used to drive the operation of the rotating material lifting structure. The main box 1 is fixedly connected to the main bracket 2, and the main box 1 is connected to the feeding pipe 13. A concave arc hole 14 is opened on the main box 1, and a sealing ring plate 15 is fixedly connected to the concave arc hole 14. The concave arc hole 14 and the sealing ring plate 15 are matched with the rotating material lifting structure. The rotating material lifting structure includes a rotating inner cylinder 16 and a material taking outer cylinder 17. The rotating inner cylinder 16 is rotatably connected to the outer expansion section 11 of the cylinder, and the rotating inner cylinder 16 is rotatably connected to the outer expansion section 11 of the cylinder, and the rotating inner cylinder 16 is rotatably connected to the outer expansion section 11 of the cylinder. The connecting inner cylinder 16 is fixedly connected with a plurality of material lifting guide cylinders 18 and a plurality of material discharging guide cylinders 19, and the plurality of material lifting guide cylinders 18 are alternately arranged with the plurality of material discharging guide cylinders 19, and the plurality of material lifting guide cylinders 18 and the plurality of material discharging guide cylinders 19 are all connected with the rotating connecting inner cylinder 16, and a plurality of material discharging troughs 20 are provided on the material discharging outer cylinder 17, and the plurality of material discharging troughs 20 are respectively connected with the plurality of material lifting guide cylinders 18, and a rotating seal is provided between the material discharging outer cylinder 17 and the sealing ring plate 15, and an upper feeding arc hole 21 and a lower material discharging arc hole 22 are provided on the cylindrical outer expansion section 11, and the plurality of material discharging guide cylinders 19 are equipped with a sealing discharging assembly, and the sealing discharging assembly includes an inner rotating ring 23 and an outer rotating ring 24, and the plurality of material discharging guide cylinders 19 are all fixedly connected with the inner rotating ring 23, and the outer rotating ring 24 It is rotatably connected to the inner rotating ring 23, and the outer rotating ring 24 and the inner rotating ring 23 cooperate to form an annular recovery chamber. Multiple discharge guide cylinders 19 are connected to the annular recovery chamber. The outer rotating ring 24 is fixedly connected to the main bracket 2. The outer rotating ring 24 is fixedly connected to an outer row inclined tube 25 connected to the annular recovery chamber. A driving gear 26 is installed on the output shaft of the servo motor 12. The driving gear 26 is meshed with a transmission gear 27. The transmission gear 27 is fixedly connected to the rotating inner cylinder 16. Through the design of the rotating lifting structure, the matching circulating screening device forms a functional component for continuous feeding, which ensures the continuous screening of aluminum powder while making the aluminum powder screening environment better isolated from the outside world, which can effectively reduce the self-oxidation reaction of aluminum powder during screening and has better practicality.

[0043] It should be further explained that, multiple material taking troughs 20 are rotatably connected with toggle arc plates 28, and multiple toggle arc plates 28 are fixedly connected with elastic tension springs 29, multiple elastic tension springs 29 are respectively fixedly connected to multiple material taking troughs 20, a permanent magnetic strip 30 is fixedly connected to the main body box 1, multiple toggle arc plates 28 are fixedly connected with iron blocks 31, multiple iron blocks 31 can be magnetically attracted by the permanent magnetic strip 30, when the iron block 31 is close to the permanent magnetic strip 30, the mutual magnetic attraction between the iron block 31 and the permanent magnetic strip 30 can achieve the corresponding toggle arc plate 28 in the corresponding installed material taking trough 20 to rotate and open, the discharge cutting pipe 7 is connected with a temporary storage box 32, the temporary storage box 32 is connected with an upward pipe 33, and a feeding conveyor belt is installed in the upward pipe 33, which is convenient for screening the remaining The temporary storage and removal of excess aluminum powder, the feeding conveyor belt includes an inner frame 34 and two outer slides 35, the two outer slides 35 are slidably connected to the upper lifting tube 33, the two outer slides 35 are fixedly connected to the cylinder frame 36, the two cylinder frames 36 are fixedly connected to the inner frame 34, the inner frame 34 is rotatably connected with a driving pulley 37 and a driven pulley 38, the driving pulley 37 and the driven pulley 38 are transmission-connected with a feeding belt 39, a plurality of transverse grabbing strips are fixedly connected to the feeding belt 39 to reduce the relative sliding of the feeding belt 39 when assisting in the screening of aluminum powder. A frequency conversion motor 40 is installed on one of the two outer slides 35, the inner frame 34 is rotatably connected with a shaft pulley 41, the frequency conversion motor 40 is used for the rotational drive of the shaft pulley 41, the driving pulley A synchronous pulley 42 is installed on 37, and a synchronous belt 43 is connected to the shaft pulley 41 for transmission. An electric telescopic rod 44 is installed at the bottom end of the lifting tube 33. The electric telescopic rod 44 is used for the synchronous movement driving of the two outer slides 35, so that the feeding belt 39 has the functions of relative height adjustment and angle adjustment in the lifting tube 33. In the actual operation process, the feeding belt 39 can be relatively adjusted according to the specific distribution of the screened aluminum powder in the temporary storage box 32. When the screened aluminum powder in the temporary storage box 32 is at a lower position, the electric telescopic rod 44 works to control the two outer slides 35 to fall relative to the lifting tube 33, so that the overall height of the feeding belt 39 moves down, and as the feeding belt 39 outputs the screened aluminum powder in the temporary storage box 32, the bottom end of the feeding belt 39 will always be close to the feeding belt 39. On the screened aluminum powder, to ensure the effective conveying of the screened aluminum powder by the feeding belt 39, a synchronous frame 45 is fixedly connected between the two outer slides 35, the telescopic rod of the electric telescopic rod 44 is connected to the synchronous frame 45, and two side bar holes 46 are provided on the upper lifting tube 33, the two side bar holes 46 are matched with the two cylinder frames 36 respectively, and the two outer slides 35 respectively cover and block the two side bar holes 46, and a guide sealing rail 47 is fixedly connected to the outside of the upper lifting tube 33, and the two outer slides 35 are respectively slidably connected in the two guide sealing rails 47, and the discharge cutting pipe 7 is connected to the lowest position of the annular cylinder 3 to ensure the effective discharge of the screened aluminum powder in the annular cylinder 3 by the discharge cutting pipe 7, and the bottom end of the main box 1 is fixedly connected to the bottom bracket 48, and the bottom bracket 48 is fixedly connected to the main bracket 2.The outer rotating ring 24 is fixedly connected to the bottom bracket 48 through the side bracket 49, so as to facilitate the corresponding bracket installation for the auxiliary main box 1 and the outer rotating ring 24.

[0044] The circulation pump 8, solenoid valve 10, servo motor 12, variable frequency motor 40 and electric telescopic rod 44 in this embodiment are all conventional equipment purchased on the market and known to those skilled in the art. In the present invention, we only use them without improving their structure and function. For those skilled in the art, their setting method, installation method and electrical connection method only need to be debugged and operated according to the requirements of their instruction manual, and will not be described in detail here.

[0045] In summary, the working principle of the aluminum powder screening and feeding system and method for acrylic plate casting production is that when in use, the discharge cutting pipe 7 is first connected to the acrylic preparation equipment, that is, the top end of the rising pipe 33 is connected to the acrylic preparation equipment, and the electromagnetic valve 10 is connected to the inert gas supply equipment. When the electromagnetic valve 10 is opened, the inert gas output by the external inert gas supply equipment will be guided into the annular cylinder 3 through the electromagnetic valve 10, the gas supply pipe 9 and the supply cutting pipe 6 in sequence, and then added to the main box 1 through the feeding pipe 13. The aluminum powder to be screened is added, and during the process of adding the aluminum powder, the contact between the aluminum powder and the oxygen in the outside air is minimized to reduce the oxidation of the aluminum powder. After the aluminum powder is added, the top of the feeding pipe 13 is immediately blocked to reduce the outside air from entering the main box 1. The power of the circulation pump 8 is turned on. The circulation pump 8 works to extract the inert gas in the annular cylinder 3 through the outer discharge cut pipe 5, and the extracted inert gas is sent back into the annular cylinder 3 through the supply cut pipe 6, so that the inert gas has a certain flow kinetic energy when passing through the cylinder expansion section 11. The servo is turned on. The servo motor 12 is powered on and works. The powered-on servo motor 12 realizes the operation of the rotating material lifting structure. The operation of the rotating material lifting structure transfers the aluminum powder in the main box 1 to the cylindrical outer expansion section 11. The aluminum powder entering the cylindrical outer expansion section 11 will pass through the cylindrical outer expansion section 11 from top to bottom under the action of its own gravity. The aluminum powder passing through the cylindrical outer expansion section 11 will be screened under the action of the inert gas passing through the cylindrical outer expansion section 11. The aluminum powder accompanied by the flow of the inert gas will be guided by the annular cylinder 3 and enter the lower part of the annular cylinder 3. The aluminum powder that is screened is sent to the acrylic preparation equipment. During the screening process of aluminum powder, the aluminum powder that is screened without the inert gas flowing through the cylindrical expansion section 11 will fall back into the rotating lifting structure under the action of its own gravity to be collected and recovered for subsequent processing. In addition, during the screening process, the kinetic energy of the inert gas passing through the cylindrical expansion section 11 can be controlled by controlling the operation of the circulating pump 8 according to actual use needs, so as to finally achieve the screening control of different particle sizes of aluminum powder.

[0046] Furthermore, when the rotating material lifting structure is in operation, the servo motor 12 is powered on to rotate the output shaft, and the rotation of the output shaft drives the driving gear 26 to rotate. Under the meshing transmission action of the driving gear 26 and the transmission gear 27, the rotation drive of the material taking outer cylinder 17 is realized, and the rotation of the material taking outer cylinder 17 causes the multiple material taking troughs 20 thereon to form synchronous rotation. During the synchronous rotation of the multiple material taking troughs 20, they will successively pass through the recessed arc bar holes 14 and be transferred into the main body box 1. Since the main body box 1 is provided with a permanent magnet bar 30, and the material taking trough 20 that rotates into the main body box 1 will make the toggle arc plate 28 in the material taking trough 20 close to the permanent magnet bar 30, the toggle arc plate 28 close to the permanent magnet bar 30 will make the iron block 31 thereon also form a relative closeness with respect to the permanent magnet bar 30, thereby making the permanent magnet The strip 30 forms a relative magnetic attraction on the approaching iron block 31. Under the action of the relative magnetic attraction, the toggle arc plate 28 overcomes the pulling force of the corresponding elastic tension spring 29 and rotates outward, so that the toggle arc plate 28 rotates out in the corresponding material trough 20. On the one hand, it prompts the notch of the material trough 20 to open, which is convenient for the entry of the aluminum powder to be screened in the main box 1. On the other hand, it is also convenient to form a shoveling and guiding collection relative to the aluminum powder, so as to achieve auxiliary feeding of the aluminum powder into the material trough 20. Along with the rotation of the material taking outer cylinder 17, when the iron block 31 is away from the permanent magnetic strip 30, the toggle arc plate 28 that is rotated and opened under the action of the elastic tension spring 29 will form a rotation closure relative to the material taking trough 20 to ensure that the annular cylinder 3 is smoothly rotated relative to the sealing ring plate 15. When the lifting guide cylinder 18 enters the material taking trough 2 0, under the action of the aluminum powder's own gravity, it will be guided into the cylinder expansion section 11 through the lifting guide cylinder 18, and the aluminum powder entering the cylinder expansion section 11 will enter from the upper feeding arc hole 21, and the screened aluminum powder will be guided by the annular cylinder 3 to form a collection, and the screened aluminum powder material will be discharged through the lower withdrawal arc hole 22, and the aluminum powder material discharged through the lower withdrawal arc hole 22 will be guided by the discharge guide cylinder 19 on the lower side of the lower withdrawal arc hole 22, and finally enter the outer rotating ring 24 to form auxiliary collection and external discharge. Since the plurality of lifting guide cylinders 18 are alternately arranged with the plurality of discharge guide cylinders 19 at intervals, when the discharge guide cylinder 19 rotates around the lower side of the lower withdrawal arc hole 22, the lifting guide cylinder 19 adjacent to the discharge guide cylinder 19 that rotates around the lower side of the lower withdrawal arc hole 22 will be The cylinder 18 will only turn over the lower side of the lower material withdrawal arc hole 22, that is, after the discharge guide cylinder 19 on the lower side of the lower material withdrawal arc hole 22 has completely recovered the aluminum powder material ejected by the corresponding lifting guide cylinder 18, the adjacent lifting guide cylinder 18 will turn over the lower side of the lower material withdrawal arc hole 22. The remaining aluminum powder material after screening has less interference with the aluminum powder to be screened, and multiple feeding troughs 20 form a sequential and continuous feeding of aluminum powder to ensure the continuous screening of aluminum powder and the continuous supply of aluminum powder used for acrylic plate casting production. The material of the feeding pipe 13 can be continuously added, but the isolation effect of the pipe mouth of the feeding pipe 13 from the outside world should be maintained. At the same time, for the introduction of inert gas, the loss of inert gas should be considered during operation, and it should be appropriately supplemented into the annular cylinder 3 according to actual conditions.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An aluminum powder screening and feeding system for acrylic plate casting production, comprising a main box (1), characterized in that: The invention also comprises a circulation screening device and a main body support (2), wherein the circulation screening device comprises an annular cylinder (3), wherein the annular cylinder (3) is fixedly connected to the main body support (2), wherein a barrier block (4) is fixedly connected inside the annular cylinder (3), wherein the annular cylinder (3) is connected to an outer row cutting pipe (5), an inlet cutting pipe (6) and a discharge cutting pipe (7), wherein the barrier block (4) is located inside the annular cylinder (3) between the outer row cutting pipe (5) and the inlet cutting pipe (6), and a circulation pump (8) is installed between the outer row cutting pipe (5) and the inlet cutting pipe (6), wherein the inlet cutting pipe (6) is connected to an air supply pipe (9), and wherein an electromagnetic valve ( 10), a cylindrical outer expansion section (11) is provided on the annular cylinder (3), a rotating material lifting structure is installed on the cylindrical outer expansion section (11), a servo motor (12) is installed on the side of the annular cylinder (3), and the servo motor (12) is used for driving the operation of the rotating material lifting structure, the main body box (1) is fixedly connected to the main body bracket (2), the main body box (1) is connected to a feeding pipe (13), a concave arc bar hole (14) is opened on the main body box (1), a sealing ring plate (15) is fixedly connected in the concave arc bar hole (14), and the concave arc bar hole (14) and the sealing ring plate (15) are both matched with the rotating material lifting structure; The rotary material lifting structure comprises a rotary inner cylinder (16) and a material taking outer cylinder (17), wherein the rotary inner cylinder (16) is rotatably connected to the cylindrical outer expansion section (11), and a plurality of material lifting guide cylinders (18) and a plurality of material discharge guide cylinders (19) are fixedly connected to the rotary inner cylinder (16), and the plurality of material lifting guide cylinders (18) are alternately arranged with the plurality of material discharge guide cylinders (19) at intervals. 9) are connected to the rotating inner cylinder (16), a plurality of material taking grooves (20) are provided on the material taking outer cylinder (17), the plurality of material taking grooves (20) are respectively connected to a plurality of material lifting guide cylinders (18), a rotating seal is provided between the material taking outer cylinder (17) and the sealing ring plate (15), an upper material feeding arc hole (21) and a lower material withdrawing arc hole (22) are provided on the cylindrical outer expansion section (11), and a plurality of material discharging guide cylinders (19) are equipped with sealing discharging components; The sealing discharge assembly comprises an inner rotating ring (23) and an outer rotating ring (24); a plurality of the discharge guide cylinders (19) are fixedly connected to the inner rotating ring (23); the outer rotating ring (24) is rotatably connected to the inner rotating ring (23); the outer rotating ring (24) and the inner rotating ring (23) cooperate to form an annular recovery chamber; a plurality of the discharge guide cylinders (19) are connected to the annular recovery chamber; the outer rotating ring (24) is fixedly connected to the main support (2); and the outer rotating ring (24) is fixedly connected to an outer discharge inclined pipe (25) connected to the annular recovery chamber.

2. The aluminum powder screening and feeding system for acrylic plate casting production according to claim 1 is characterized in that: A driving gear (26) is mounted on the output shaft of the servo motor (12), the driving gear (26) is meshed with a transmission gear (27), and the transmission gear (27) is fixedly connected to the transfer inner cylinder (16).

3. The aluminum powder screening and feeding system for acrylic plate casting production according to claim 2 is characterized in that: A plurality of the material taking troughs (20) are rotatably connected with a toggle arc plate (28), and the plurality of the toggle arc plates (28) are fixedly connected with an elastic tension spring (29), and the plurality of the elastic tension springs (29) are respectively fixedly connected in the plurality of the material taking troughs (20). A permanent magnetic strip (30) is fixedly connected in the main body box (1), and the plurality of the toggle arc plates (28) are fixedly connected with an iron block (31), and the plurality of the iron blocks (31) can be magnetically attracted by the permanent magnetic strip (30).

4. The aluminum powder screening and feeding system for acrylic plate casting production according to claim 3 is characterized in that: The discharge cutting pipe (7) is connected to a temporary storage box (32), the temporary storage box (32) is connected to an upward pipe (33), and a feeding conveyor belt is installed in the upward pipe (33).

5. The aluminum powder screening and feeding system for acrylic plate casting production according to claim 4 is characterized in that: The feeding conveyor belt comprises an inner frame (34) and two outer slides (35), the two outer slides (35) are both slidably connected to the lifting tube (33), the two outer slides (35) are both fixedly connected to a cylinder frame (36), the two cylinder frames (36) are both fixedly connected to the inner frame (34), a driving pulley (37) and a driven pulley (38) are rotatably connected in the inner frame (34), a feeding belt (39) is transmission-connected between the driving pulley (37) and the driven pulley (38), and the two outer slides (35) are fixedly connected to the inner frame (34). A variable frequency motor (40) is mounted on an outer slide (35); a shaft pulley (41) is rotatably connected inside the inner frame (34); the variable frequency motor (40) is used to drive the shaft pulley (41) to rotate; a synchronous pulley (42) is mounted on the driving pulley (37); a synchronous belt (43) is connected to the shaft pulley (41); an electric telescopic rod (44) is mounted on the bottom end of the upper lifting tube (33); the electric telescopic rod (44) is used to drive the synchronous movement of the two outer slides (35).

6. The aluminum powder screening and feeding system for acrylic plate casting production according to claim 5 is characterized in that: A synchronous frame (45) is fixedly connected between the two outer slide frames (35), the telescopic rod of the electric telescopic rod (44) is connected to the synchronous frame (45), two side bar holes (46) are opened on the upward tube (33), the two side bar holes (46) are matched with the two cylindrical frames (36) respectively, a guide sealing track (47) is fixedly connected to the outside of the upward tube (33), and the two outer slide frames (35) are slidably connected in the two guide sealing tracks (47) respectively.

7. The aluminum powder screening and feeding system for acrylic plate casting production according to claim 6 is characterized in that: The discharge cutting pipe (7) is connected to the lowest position of the annular cylinder (3); the bottom end of the main box (1) is fixedly connected to a bottom bracket (48); the bottom bracket (48) is fixedly connected to the main bracket (2); and the outer rotating ring (24) is fixedly connected to the bottom bracket (48) via a side bracket (49).

8. A method for screening and feeding aluminum powder for acrylic plate casting production, characterized in that: An aluminum powder screening and feeding system for acrylic plate casting production according to any one of claims 1 to 7 is used, comprising the following steps: S1. When in use, firstly, the discharge cutting pipe (7) is connected to the acrylic preparation equipment, and the electromagnetic valve (10) is connected to the inert gas supply equipment. When the electromagnetic valve (10) is opened, the inert gas output by the external inert gas supply equipment is guided into the annular cylinder (3) through the electromagnetic valve (10), the gas adding pipe (9) and the supply cutting pipe (6) in sequence, and then the aluminum powder to be screened is added to the main box (1) through the feeding pipe (13). In the process of adding the aluminum powder, the contact between the aluminum powder and the oxygen in the external air is minimized to reduce the oxidation of the aluminum powder. After the aluminum powder is added, the top of the feeding pipe (13) is immediately blocked to reduce the entry of external air into the main box (1); S2, turning on the power supply of the circulation pump (8), the circulation pump (8) works to extract the inert gas in the annular cylinder (3) through the outer discharge cut pipe (5), and then feeds the extracted inert gas into the annular cylinder (3) again through the supply cut pipe (6), so that the inert gas has a certain flow kinetic energy when passing through the cylindrical outer expansion section (11), and turning on the power supply of the servo motor (12), the servo motor (12) is powered on, and the powered servo motor (12) realizes the operation of the rotating material lifting structure, and the operation of the rotating material lifting structure transfers the aluminum powder in the main box (1) to the cylindrical outer expansion section (11); S3, the aluminum powder entering the cylindrical expansion section (11) will pass through the cylindrical expansion section (11) from top to bottom under the action of its own gravity, and the aluminum powder passing through the cylindrical expansion section (11) will be screened under the action of the inert gas passing through the cylindrical expansion section (11), and the aluminum powder flowing with the inert gas will be guided by the annular cylinder (3) and enter the bottom of the annular cylinder (3), and finally pass through the discharge cutting tube (7) to form an output, that is, the screened aluminum powder is sent to the acrylic preparation equipment; S4. During the aluminum powder screening process, the aluminum powder that is screened without the inert gas flowing through the cylindrical outer expansion section (11) will fall back into the rotating material lifting structure under the action of its own gravity to be collected and recovered for subsequent processing. In addition, during the screening process, the kinetic energy of the inert gas passing through the cylindrical outer expansion section (11) can be controlled by controlling the operation of the circulation pump (8) according to actual use needs, thereby ultimately achieving screening control of aluminum powder of different particle sizes.

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