Investment casting slurry preparation method and investment casting automatic shell making production line

Abstract

The invention discloses an investment casting slurry preparation method which comprises the following steps: S1, mixing silicon-based ceramic powder with different particle grades, taking fused quartz silicon dioxide with the particle size of 100-500 nm and accounting for 40%-45% of the total powder by mass, silicon dioxide with the particle size of 1-100 microns and accounting for 20%-35% of the total powder by mass, and silicon dioxide with the particle size of 300-500 microns and accounting for 20%-35% of the total powder by mass; the powder accounts for 10%-35% of the total powder by mass. According to the investment casting slurry preparation method and the investment casting automatic shell making production line, light-cured slurry is used, after sand spraying, UV light is irradiated, the UV light irradiates the slurry adhered to an investment from gravel gaps, then the slurry is cured, meanwhile, gravel adhered to the surface of the slurry is cured together, and the investment casting automatic shell making production line is obtained. The whole sand shell curing process becomes simple and rapid, the shell making efficiency is improved, and meanwhile the shell making energy consumption is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of automated shell making, in particular to an investment casting slurry configuration method and an investment casting automated shell making production line. Background Art

[0002] Investment casting is also called lost wax casting. In the initial stage of casting, the surface of the wax mold needs to be repeatedly drenched with sand to form a complete sand shell. With the development of automation, the wax mold surface is slurried and drenched with sand by robots as described in patent publication number CN113182497A. Existing slurries are solidified by drying, and the solidification speed limits the circulation speed of the sand mold. If the slurry is not completely solidified after dipping and sanding, it cannot be dipped and sanded again. Therefore, in the shell production line, the shell making speed depends entirely on the solidification speed after dipping and sanding.

[0003] At the same time, the existing solidification process consumes a lot of energy to accelerate its solidification.

[0004] Therefore, a slurry that can cure quickly with low energy consumption is needed. Summary of the invention

[0005] The existing slurry takes a long time to solidify after the wax mold is dipped in slurry and sprinkled with sand, and the energy consumption for its solidification is high.

[0006] In view of the deficiencies in the prior art, the present invention provides an investment casting slurry configuration method and an investment casting automated shell production line.

[0007] In order to solve the above technical problems, the present invention solves the problems through the following technical solutions: a method for configuring investment casting slurry: S1: Mix silicon-based ceramic powders of different particle sizes: Take fused silica with a particle size of 100-500 nm, which accounts for 40%-45% of the total powder mass; Silicon dioxide with a particle size of 1-100 μm, accounting for 20%-35% of the total powder mass; The silicon dioxide with a particle size of 300-500 μm accounts for 10%-35% of the total powder mass ratio.

[0008] S2: Mix a photoinitiator, a light absorber, a crosslinking agent and a monomer, wherein the main monomer is 1,6-hexanediol diacrylate.

[0009] S3: Take the mixture of the silicon-based ceramic powder mixed in S1 and the mixture of S2, and stir them using a stirrer.

[0010] S4: The mixer in S3 uses different rotation speeds to stir the mixture into a viscous mixture, thereby obtaining a slurry.

[0011] The beneficial effect is that the prepared slurry can be cured by UV light, and the silicon-based ceramic powder inside can be cured at the same time during the curing process.

[0012] In the above scheme, preferably, the purity of the nano-scale and micro-scale silicon dioxide in S1 is 99wt%.

[0013] In the above scheme, preferably, a mineralizer is also added during the mixing and stirring process of S3 to adjust the viscosity of the slurry.

[0014] In the above scheme, preferably, in S4, S41: the mixer is first operated at a speed of 20-40 r / min for 1-10 min; S42: it is operated at a speed of 60-100 r / min for 5-15 min; S43: it is operated at a speed of 150-300 r / min for 15-20 min; S44: it is operated at a speed of 300-400 r / min for 2-20 min to obtain a slurry.

[0015] Its beneficial effect is that the mixing is more uniform and the performance of the whole barrel of slurry after mixing remains consistent.

[0016] In the above scheme, preferably, the stirring time in S41 is 5-8 min; the rotation speed in S44 is 350-380 r / min, and runs for 5-10 min.

[0017] The investment casting automated shell production line includes a slurry preparation room, which includes a mixer and a transfer vehicle for transporting the mixer, the mixer is used to mix the mixture into slurry, a sand pouring line, the sand pouring line includes multiple sand pouring machines, a robot and an investment casting flow line, mixers with slurry are placed around the sand pouring machine, investment castings are hung on the investment casting flow line, the robot clamps the investment castings on the investment casting flow line and immerses them in the slurry of the mixer, after transferring them to the sand pouring machine for sand pouring, they are hung on the investment casting flow line for circulation, and a solidification room, the solidification room is provided with a UV lighting device for accelerating the solidification of the slurry with sand and gravel.

[0018] The beneficial effect is that, by using light-curing slurry and irradiating UV light after sand pouring, the UV light is irradiated from the gaps between the sand and gravel onto the slurry adhered to the investment mold, thereby solidifying the slurry and the sand and gravel adhered to the surface of the slurry, making the curing process of the entire sand shell simple and fast.

[0019] In the above scheme, preferably, the rotation speed of the mixer located around the sand spraying machine is 20-40r / min to prevent slurry deposition.

[0020] In the above scheme, preferably, after the robot immerses the molten mold in the mixer, it rotates 3-10 times at a speed of 20-40r / min, and then rotates 3-10 times in the opposite direction. After the robot lifts the molten mold from the mixer, it rotates 3-10 times at a speed of 20-40r / min, and then rotates 3-10 times in the opposite direction.

[0021] In the above scheme, preferably, the sand spraying line 2 also includes a dust removal device for reducing the dust content around the sand spraying line.

[0022] In the above scheme, preferably, the dust removal device is connected to the inside of the sand shower machine through a pipeline to reduce dust overflow when sand showering is carried out.

[0023] The beneficial effects of the present invention are: a method for configuring investment casting slurry and an automated shell making production line for investment casting, which use light-curing slurry, and irradiate UV light after sand pouring. The UV light irradiates the slurry adhered to the investment casting from the gaps between the sand and gravel, thereby solidifying the slurry, and at the same time solidifies the sand and gravel adhered to the surface of the slurry, making the entire sand shell curing process simple and fast, improving the shell making efficiency, and reducing the energy consumption of shell making. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the assembly line of the present invention.

[0025] Figure 2 It is a partial schematic diagram of the present invention.

[0026] Figure 3 It is a cross-sectional view of the detection unit and the collection unit of the present invention.

[0027] Figure 4 This is a partial enlarged view of the concave inflatable member of the present invention.

[0028] Figure 5 It is a partial enlarged view of the cross-sectional view of the spray channel of the present invention.

[0029] Figure 6 It is a partial enlarged view of the cross-sectional view of the outflow pipe of the present invention.

[0030] Figure 7 This is a partial enlarged view of the junction between the collection unit and the base of the present invention. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments: Example

[0032] See also Figure 1-Figure 7 , A method for preparing a slurry for investment casting, S1: taking nano-scale and micron-scale silicon-based ceramic powders and mixing them, wherein the fused quartz silicon dioxide with a particle size of 200-300 nm accounts for 40%-45% of the total powder mass ratio, the silicon dioxide with a particle size of 50-80μm accounts for 30%-35% of the total powder mass ratio, and the silicon dioxide with a particle size of 300-400μm accounts for 20%-35% of the total powder mass ratio, and mixing them into a mixed silicon-based ceramic powder, wherein the purity of the nano-scale and micron-scale silicon dioxide is 99wt%.

[0033] S2: Mix a photoinitiator, a light absorber, a crosslinker and a monomer, wherein the main monomer is 1,6-hexanediol diacrylate, the crosslinker is ethoxylated pentaerythritol tetraacrylate (PPTTA), the photoinitiator is a mixture of benzoin dimethyl ether, 2,4,6-trimethylbenzoyl diphenyl phosphine oxide, triarylsulfonium salts, etc., and the light absorber is mainly phenyl o-hydroxybenzoate.

[0034] S3: Take the mixture of silicon-based ceramic powder mixed with S1 and S2, and stir them with a stirrer. The stirrer is first operated at a speed of 20-40 r / min for 5-8 min: 60-100 r / min for 5-15 min; 150-300 r / min for 15-20 min; and 350-380 r / min for 5-10 min to obtain a slurry, which is then stirred at a speed of 20-40 r / min to prevent the slurry from settling.

[0035] When the slurry is put into the mixer for stirring, a mineralizer needs to be added. The mineralizer is a mixture of aluminum oxide and zirconium oxide, which is used to adjust the viscosity of the slurry.

[0036] The silicon-based ceramic powder mixed in S1 accounts for 30%-35% of the total mass ratio of the slurry, the mineralizer accounts for 8%-10% of the total mass ratio of the slurry, the photoinitiator accounts for 4%-5% of the total mass ratio of the slurry, the light absorber accounts for 4%-5% of the total mass ratio of the slurry, the cross-linking agent accounts for 3%-5% of the total mass ratio of the slurry, the monomer accounts for 15%-40% of the total mass ratio of the slurry, and the mass ratio of the cross-linking agent to the monomer is (5-8):1.

[0037] The investment casting automated shell production line comprises a slurry preparation room 1, a sand sprinkling line 2 and a solidification room. The preparation room 1 comprises a mixer 11 and a transfer vehicle 12. A manipulator or a feeding device puts the mixture into the mixer 11, and the mixer 11 starts to stir the mixture into a slurry. When the slurry remaining amount alarm in the mixer 11 in the sand sprinkling line 2 sounds, the mixer 11 that has completed stirring is moved to the sand sprinkling line 2 by the transfer vehicle 12 to replace the mixer that has sounded the remaining amount alarm.

[0038] The sand spraying line 2 includes a plurality of sand spraying machines 21, a robot 22 and a mold transfer line arranged in sequence. The mold transfer line is provided with an outlet at each sand spraying machine 21. The robot 22 takes the mold to be sanded from the mold transfer line and immerses it into the slurry of the mixer 11. The robot 22 controls the mold to rotate clockwise at a speed of 20-40r / min for 3-5 circles, and then rotates counterclockwise at the same speed for 3-5 circles, and then lifts the mold from the mixer 11 and keeps it stationary for 30-90S. Excess slurry drips off, and then it rotates clockwise for 3-5 circles at a speed of 20-40r / min, and then rotates counterclockwise for 3-5 circles at the same speed, and then the molten mold is sent to the sand spraying machine 21 for sand spraying. After the sand spraying is completed, the molten mold is hung back to the molten mold flow line, and the molten mold flow line drives the molten mold after sand spraying into the solidification chamber. A UV lighting device is provided in the solidification chamber. The ultraviolet light shines on the slurry through the gaps in the gravel, so that the slurry solidifies quickly, thereby reducing the time for the sand shell to solidify after sand spraying and improving the shell making efficiency.

[0039] The sand spraying line 2 also includes a dust removal device for reducing the dust content around the sand spraying line 2, and is connected to the inside of the sand spraying machine 21 through a pipeline to reduce dust overflow during sand spraying.

[0040] It also includes a detection unit 3 and a collection unit 4. The collection unit 4 is fixedly arranged on the side of the dust removal device through a fixed frame. The collection unit 4 includes a shell, a dust suction port 41 and a dust suction pipe 42. One end of the dust suction pipe 42 is connected to the dust suction pipe of the dust removal device through a pipe, and the other end is connected to the dust suction port 41. Therefore, when the dust removal device is working, the dust around the sand shower machine can be sucked into the dust removal device through the dust suction port 41 to reduce the dust in the surrounding environment.

[0041] The detection unit 3 includes a dust detection part 31, a lifting device 32, a spray device 33 and a concave inflatable part 34. The dust detection part 31 includes an inlet pipe 311, a laser dust monitor 312 and an outflow pipe 315. The bottom of the outflow pipe 315 is connected to the bottom of the inlet pipe 311. The concave inflatable part 34 is an upwardly concave hemispherical body filled with low-density gas, specifically including hydrogen and helium, thereby giving the concave inflatable part 34 the ability to float and rise in the air. The concave inflatable part 34 is fixedly connected to the upper end of the inlet pipe 311 by a fixing rod. A downward guiding cone 341 is provided at the center of the concave surface of the concave inflatable part 34. The center of the guiding cone 341 is aligned with the inlet pipe 311, and the upper end of the inlet pipe 311 is provided with a cone mouth, so that the air introduced by the concave inflatable part 34 can be better passed into the inlet pipe 311 and flow out from the outflow pipe 315.

[0042] The laser dust monitor 312 is arranged in the inlet pipe 311. A flow tube is arranged in the laser dust monitor 312. The air flowing through the inlet pipe 311 enters the laser dust monitor 312. The laser dust monitor 312 can detect the dust content in the air flowing through. In order to ensure the consistency in the dust detection process, it is necessary to control the consistency of the flow rate flowing to the laser dust monitor 312, thereby ensuring that the flow rate entering the laser dust monitor 312 is consistent and the detection result is guaranteed. Therefore, an adjustment plate 314 is arranged in the inlet pipe 311, and the adjustment plate 314 is located above the laser dust monitor 312, which is used to adjust the air flow rate flowing to the laser dust monitor 312.

[0043] The lifting device 32 includes a base 321, an elastic support member 322 and a pulling device 323. The dust detection member 31 and the spray device 33 are arranged on the base 321. One end of the elastic support member 322 touches the base 321, and the other end touches the collecting unit 4. The pulling device 323 includes a pull rope 3231 and a winding motor 3232. The winding motor 3232 is arranged on the collecting unit 4. One end of the pull rope 3231 is connected to the center of the base 321, and the other end is connected to the winding motor 3232. The pull rope 3231 is located in the middle of the elastic support member 322, and the elastic support member 322 is a spring.

[0044] The winding motor 3232 winds the pull rope 3231 around the winding disk, thereby pulling the base 321 downward, compressing the elastic support member 322 during the downward movement, and when the winding motor 3232 is released, the base 321 rises upward under the action of the elastic support member 322. At the same time, when the base 321 rises to the highest point, the elastic support member 322 maintains a certain elastic force, so that the base 321 will not shake left and right.

[0045] The spray device 33 includes a spray ring 331, a spray channel 332 connected to the spray ring 331, an ultrasonic high-frequency oscillator 333 and a water storage chamber 334. The water storage chamber 334 is arranged on the base 321 and can store a certain amount of water therein. One end of the spray channel 332 is arranged in the water storage chamber 334, and an inlet 3321 is opened on the spray channel 332 at this end. A fan is arranged above the inlet 3321 for passing the air in the water storage chamber 334 into the spray channel 332. The upper end of the spray channel 332 is connected to the spray ring 331. The spray ring 331 is surrounded by a spray port and is located above the concave inflatable member 34. The outflow pipe 315 is fixedly arranged on the spray ring 331, so that the spray and the inflowing air are discharged above the concave inflatable member 34.

[0046] When dust detection is required for the surrounding environment, the winding motor 3232 first releases the pull rope 3231, and the elastic support member 322 drives the dust detection member 31 and the spray device 33 to rise to the highest point. At this time, the highest point can be freely set according to the height of the site. After reaching the highest point, the winding motor 3232 starts to rotate, driving the dust detection member 31 and the spray device 33 to move downward, and the concave inflatable member 34 introduces the air collected in the cross section into the inlet pipe 311, and the laser dust meter 312 detects the dust content of the inflowing air.

[0047] The ultrasonic high-frequency oscillator 333 adjusts the vibration frequency according to the parameters of the control system based on the detected dust content. When the dust content is high, the vibration frequency is high, thereby generating more water mist, which is sprayed out from the spray ring 331. When the dust content is high, the speed of the winding motor 3232 slows down, thereby allowing the dust detection element 31 and the spray device 33 to stay in this area for a longer time. The spray device 33 sprays more water mist around, causing the dust in the surrounding air to clump and fall downward.

[0048] When the speed of the winding motor 3232 slows down, the air flow introduced into the inlet pipe 311 decreases, and the flow rate through the laser dust monitor 312 slows down. In order to ensure the accuracy of the detection, the adjustment plate 314 is controlled to extend, and the opening above the laser dust monitor 312 is reduced, thereby accelerating the air flow rate to return to the previous flow rate, thereby maintaining the accuracy of the values ​​measured by the laser dust monitor 312.

[0049] The inlet pipe 311 is provided with a first channel 313, one end of the first channel 313 is connected to the inlet pipe 311, and the other end is connected to the water storage chamber 334, so that when the fan at the inlet 3321 rotates, the air in the water storage chamber 334 can be blown into the spray channel 332, and at the same time, when the adjustment plate 314 extends forward, part of the air entering the inlet pipe 311 is blocked by the adjustment plate 314, and then flows back into the first channel 313, and then enters the spray channel 332, and then when the winding motor 3232 decelerates, part of the air enters the spray channel 332, and more water mist is sprayed out from the spray ring 331.

[0050] When the winding motor 3232 is decelerated, the oscillation frequency of the ultrasonic high-frequency oscillator 333 is increased, thereby generating more water mist. As a result, the water mist content in the airflow sprayed by the spray ring 331 is higher, causing more dust to clump and fall downward, thereby achieving a better dust removal effect.

[0051] The dust suction port 41 is located below the detection unit 3. After the spray device 33 sprays water mist, the dust clumps and falls downward and is sucked into the dust suction pipe 42 by the dust suction port 41, thereby playing a dust removal role. At this time, the air sucked in by the dust suction port 41 has a high humidity due to the effect of the spray. After being directly sucked into the dust removal device, it may adhere to the dust removal bag in the dust removal device, thereby reducing the dust removal effect of the dust removal device. Therefore, a condensation device is arranged in the dust suction pipe 42, and the air sucked in by the dust suction port 41 passes through the condensation device and then is sucked into the dust removal device, thereby protecting the dust removal device.

[0052] The base 321 is provided with a conductive ring 3211 and a water inlet channel 3212, and the collecting unit 4 is provided with a charging slot 43 matching the conductive ring 3211 and a water replenishment channel 44 matching the water inlet channel 3212. The winding motor 3232 winds the pull rope 3231 to the base 321 and presses it on the collecting unit 4. The conductive ring 3211 is inserted into the charging slot 43 to charge the battery power supply provided on the base 321 for powering the ultrasonic high-frequency oscillator 333 and the laser dust monitor 312. At the same time, the water replenishment channel 44 is connected with the water inlet channel 3212 to replenish the water storage chamber 334.

[0053] Its working principle or usage is as follows: The detection work can be started through timing control, and the detection unit 3 and the collection unit 4 are controlled by the central control unit in the assembly line, and the detection work is automatically started after the sand spraying machine runs for a set time.

[0054] When the detection work is started, the winding motor 3232 releases the brake, and then the base 321 rises upward under the action of the elastic support member 322, and the upward rise of the base 321 drives the dust detection member 31 and the spray device 33 to move upward to the highest point.

[0055] After reaching the top, the winding motor 3232 starts to wind the pull rope 3231, thereby driving the base 321 to move downward. In the process of moving downward, the dust detection component 31 and the spray device 33 are driven downward, and the concave inflatable component 34 also descends together. Then, the air gathered in the concave surface is introduced into the inlet pipe 311 through the guide vertebra 341, and is discharged from the upper end of the outflow pipe 315 after passing through the laser dust monitor 312. The laser dust monitor 312 performs dust detection on the air passing through.

[0056] The rotation speed of the winding motor 3232 is controlled by the numerical value detected by the laser dust monitor 312. The greater the dust content, the slower the rotation speed of the winding motor 3232. At the same time, the vibration frequency of the ultrasonic high-frequency oscillator 333 is accelerated, so that the spray device 33 sprays more water mist per unit height, causing more dust to agglomerate. The concave inflatable part 34 is an upwardly concave hemispherical body. Therefore, even if the dust agglomerates and falls, it will fall on the spherical surface of the concave inflatable part 34 and will not fall into the space below the concave inflatable part 34, thereby not affecting subsequent detection results.

[0057] At the same time, since the speed of the winding motor 3232 slows down, the air flow rate flowing through the laser dust monitor 312 slows down. In order to ensure the detection result, the adjustment plate 314 is electrically controlled. A flow rate sensor is provided on the laser dust monitor 312. By changing the extended position of the adjustment plate 314, the size of the channel opening in front of the adjustment plate 314 is changed, and then the flow rate of the air passing through the channel opening is changed, so that the air flow rate flowing through the laser dust monitor 312 remains consistent.

[0058] Part of the air blocked by the adjustment plate 314 flows into the water storage chamber 334 from the first channel 313, thereby increasing the amount of air entering the inlet 3321, and the spray ring 331 sprays more air, further increasing the amount of spray, thereby enhancing the purpose of dust reduction.

[0059] The dust agglomerates and falls downward, and is sucked into the dust suction duct 42 by the dust suction port 41, thereby achieving the dust removal effect.

[0060] When the winding motor 3232 winds the pull rope 3231 to the base 321 and presses it on the collection unit 4, the winding motor 3232 stops rotating and remains in a brake state. At this time, the conductive ring 3211 is inserted into the charging slot to charge the power supply arranged on the base 321. At the same time, the water replenishment channel is connected to the water inlet channel 3212 to replenish the water storage chamber 334 to prepare for the next detection.

[0061] At the same time, a switch device is provided on the dust suction pipe 42, and the switch device is used to open or block the dust suction pipe 42. When the detection starts, the switch device is opened, and then the dust suction operation is performed. After the winding motor 3232 stops, the switch device delays the closing time according to the winding time of the winding motor 3232. The longer the running time of the winding motor 3232 is, the longer the delayed closing time is, so that more agglomerated dust is sucked in. Example

[0062] Compared with the first embodiment, the difference lies in the setting position of the collecting unit 4, which is the same as that of the first embodiment, see Figure 1-Figure 7 The collecting unit 4 can also be independently set on the ground through a bracket and located around the sand shower machine. Example

[0063] Compared with the first embodiment, the difference lies in the setting position of the collection unit 4 and the dust collection method of the collection unit 4, which are the same as those of the first embodiment, see Figure 1-Figure 7 The detection unit 3 is arranged on the collection unit 4, and the collection unit 4 is arranged on the AGV trolley. The rear end of the dust collection pipe 42 of the collection unit 4 is connected to the vacuum cleaner. The AGV trolley moves freely on the preset track in the venue, stops at a random position of the track, and then starts the dust removal work.

[0064] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for preparing an investment casting slurry, characterized in that: S1: Mix silicon-based ceramic powders of different particle sizes: Take fused silica with a particle size of 100-500 nm, which accounts for 40%-45% of the total powder mass; Silicon dioxide with a particle size of 1-100 μm, accounting for 20%-35% of the total powder mass; Silicon dioxide with a particle size of 300-500 μm, accounting for 10%-35% of the total powder mass; S2: mixing a photoinitiator, a light absorber, a crosslinking agent and a monomer, wherein the main monomer is 1,6-hexanediol diacrylate; S3: taking a mixture of the silicon-based ceramic powder mixed in S1 and the mixture of S2, and stirring them using a stirrer; S4: The mixer in S3 uses different rotation speeds to stir the mixture into a viscous mixture, thereby obtaining a slurry.

2. The method for preparing an investment casting slurry according to claim 1, characterized in that: The purity of the nano-scale and micro-scale silicon dioxide in S1 is 99 wt %.

3. The method for preparing an investment casting slurry according to claim 1, characterized in that: A mineralizer is also added during the mixing and stirring process of S3 to adjust the viscosity of the slurry.

4. The method for preparing an investment casting slurry according to claim 1, characterized in that: In S4, S41: The mixer first runs at a speed of 20-40 r / min for 1-10 min; S42: Run at 60-100 r / min for 5-15 min; S43: Run at 150-300 r / min for 15-20 min; S44: After running at a rotation speed of 300-400 r / min for 2-20 min, a slurry is obtained.

5. The method for preparing investment casting slurry according to claim 4, characterized in that: The stirring time in S41 is 5-8 minutes; the rotating speed in S44 is 350-380 r / min and runs for 5-10 minutes.

6. An investment casting automated shell production line using an investment casting slurry configuration method according to any one of claims 1 to 5, characterized in that: The invention comprises a slurry preparation chamber (1), wherein the preparation chamber (1) comprises a mixer (11) and a transfer vehicle (12) for transporting the mixer (11), wherein the mixer (11) is used to stir the mixture into slurry; A sand spraying line (2), the sand spraying line (2) comprising a plurality of sand spraying machines (21), a robot (22) and a mold transfer line, a mixer (11) containing slurry is placed around the sand spraying machine (21), and a mold is hung on the mold transfer line; The robot (22) clamps the molten mold on the molten mold flow line and immerses it into the slurry of the mixer (11), and after transferring it to the sand spraying machine (21) for sand spraying, it is hung and placed on the molten mold flow line for circulation; A solidification chamber is provided with a UV lighting device to accelerate the solidification of the slurry with sand and gravel.

7. The investment casting automated shell production line according to claim 6, characterized in that: The rotation speed of the mixer (11) located around the sand spraying machine (21) is 20-40 r / min to prevent slurry from settling.

8. The investment casting automated shell production line according to claim 6, characterized in that: After the robot (22) immerses the melt in the mixer (11), it rotates at a speed of 20-40 r / min for 3-10 turns, and then rotates in the opposite direction for 3-10 turns; After the robot (22) lifts the melt from the mixer (11), it rotates it at a speed of 20-40 r / min for 3-10 turns, and then rotates it in the opposite direction for 3-10 turns.

9. The investment casting automated shell production line according to claim 6, characterized in that: The sand spraying line (2) also includes a dust removal device, which is used to reduce the dust content around the sand spraying line (2).

10. The investment casting automated shell production line according to claim 9, characterized in that: The dust removal device is connected to the interior of the sand shower machine (21) via a pipeline, so as to reduce dust spillage during sand showering.

Images