Ester hardening device and process of modified binder for improving collapsibility of sodium silicate-bonded sand

Abstract

The invention discloses an ester hardening device and process of a modified binder for improving collapsibility of sodium silicate-bonded sand. According to the ester hardening device and process, ester, an accelerant, a collapsibility agent and sodium silicate are quantitatively added through a batching device and are mixed and stirred to form a product; new sand, old sand and products are added into the mixing, stirring and hardening device through the three feeding devices to be mixed and hardened, sodium silicate-bonded sand with high collapsibility and high hardness is obtained and used for casting, the three feeding devices are linked and synchronously used during feeding, and raw material mixing is facilitated; in addition, by adding esters, an accelerant and a collapsing agent, the performance of the sodium silicate-bonded sand is improved, the casting cost is reduced, the casting quality is improved, meanwhile, the using amount of sodium silicate is reduced, the obtained sodium silicate-bonded sand is more beneficial to recycling, waste emission in the casting process is effectively reduced, environmental pollution is reduced, the advanced energy-saving and carbon-reducing technology is broken through, and the economic benefit is increased. And development and application of the low-carbon smelting technology are accelerated.

Description

Technical Field

[0001] The invention relates to the field of advanced steel material processing, and in particular to an ester hardening device and process for a modified binder used to improve the disintegration of water glass sand. Background Art

[0002] Water glass, also known as sodium silicate, is a multiphase dispersed aqueous solution composed of a true sodium silicate solution and silica gel particles. Due to its low cost, wide resources, convenient operation, no pollution, flexible application, energy saving, high-quality castings and few waste products, it was introduced into my country's foundry industry in the early 1950s. It has been widely used in the production of steel castings, and there is a trend of continuous expansion of its application. Its application prospects are very broad.

[0003] In the casting process, water glass sand is widely used due to its colorless and odorless, low price, and easy operation. However, with the development of green and clean casting technology, traditional water glass sand, as a unique casting material, is no longer suitable for the current production process requirements due to its significant shortcomings such as low sand mold strength, high water glass addition, high water content, easy moisture absorption, poor hardening in winter, poor sand core collapse, difficulty in manual sand cleaning, difficulty in regeneration, large amounts of old sand being discarded, and environmental pollution. Summary of the invention

[0004] Based on the shortcomings of the prior art that water glass sand for casting has high addition amount, poor disintegration and is difficult to recycle, the present invention provides an ester hardening device and process for a modified binder for improving the disintegration of water glass sand.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: an ester hardening device for a modified binder for improving the disintegration of water glass sand, comprising:

[0006] A batching device, which has a batching bin, in which a first stirring device is provided for quantitatively adding esters, water glass and additives and stirring them evenly;

[0007] A first feeding device, which has a first feeding bin and a spiral feeder is arranged in the bin for adding new sand;

[0008] The second feeding device has a second feeding bin and a spiral feeder is arranged in the bin for adding old sand;

[0009] The third feeding device is a draw-out feeding device, which is connected to the proportioning bin;

[0010] The mixing and hardening device comprises a mixing and stirring bin, in which a second stirring device is arranged, and the discharge ends of the first feeding device, the second feeding device and the extractable feeding device are all connected to the mixing and stirring bin;

[0011] Among them, two spiral feeders and an extraction-type feeding device are synchronously driven by a driving device so that when feeding, water glass, sand particles, esters and additives are synchronously added into the mixing and stirring bin in equal proportions.

[0012] Preferably, the extractable feeding device includes a hollow sealing seat, a feed pipe arranged on the top of the sealing seat, a discharge pipe arranged on the left side of the sealing seat, a piston cylinder arranged on the right side of the sealing seat and a switch shaft rotatably arranged in the sealing seat, sealing rings are arranged on both sides of the switch shaft for forming a seal with the inner wall of the sealing seat, the feed pipe is connected with the proportioning bin, the discharge pipe is connected with the mixing and stirring bin, a T-shaped three-way channel is arranged on the switch shaft, one end of the switch shaft extends out of the sealing seat and is provided with a first driving mechanism for driving it to rotate back and forth 90 degrees, a piston rod is arranged in the piston cylinder, and a transmission mechanism for driving it to extend and retract is arranged at the outer end of the piston rod, and the transmission mechanism and the two spiral feeders are driven synchronously.

[0013] Preferably, the transmission mechanism includes a mounting frame and a rotating wheel plate arranged on the mounting frame. An articulated arm is hinged at an eccentric position on the rotating wheel plate. The other end of the articulated arm is rotatably connected to the outer end of the piston rod. The rotating wheel plate and the two spiral feeders are driven synchronously.

[0014] Preferably, it also includes a driving motor, and the two spiral feeders each have a feed shaft, and the two feed shafts are connected by a sprocket transmission, and one of the two feed shafts is connected to the output shaft of the driving motor by transmission, and the end of the output shaft is provided with a bevel gear and meshed with a bevel gear, and the bevel gear has a gear shaft and the gear shaft is connected to the rotating wheel by transmission.

[0015] Preferably, the first driving mechanism includes a driving cylinder rotatably arranged on a mounting frame and a hinged rod rotatably arranged at the end of the driving cylinder, the end of the hinged rod is fixedly connected to the outer end of the switch shaft, a magnetic steel block is provided on the rotating wheel, a Hall sensor is provided on the mounting frame, and the Hall sensor is electrically connected to the control unit of the driving cylinder.

[0016] Preferably, the second stirring device includes an external stirring device arranged in the stirring bin, the external stirring device has a feeding channel inside, the first feeding device, the second feeding device and the third feeding device all feed into the feeding channel, an internal stirring device is arranged in the feeding channel, and the external stirring device and the internal stirring device are driven by the stirring driving mechanism to rotate in opposite directions.

[0017] Preferably, the external stirring device includes a circular tubular shaft on the lower side and a conical bucket arranged on the top of the shaft, and the shaft is rotatably matched with the mixing and stirring bin and extends out of the mixing and stirring bin to be driven to rotate by a stirring drive mechanism.

[0018] Preferably, the internal stirring device includes a stirring shaft which rotates with the mixing and stirring bin and extends out of the mixing and stirring bin and is driven by a stirring drive mechanism. The upper part of the stirring shaft is provided with a right-angled trapezoidal stirring blade and the stirring blade is located in the conical bucket. The lower part of the stirring shaft is provided with a spiral blade and the spiral blade is located in the tube shaft. Two S-shaped blades are provided on the lower outer wall of the tube shaft, and the bottom end of the S-shaped blade is located at the bottom surface of the mixing and stirring bin.

[0019] Preferably, the stirring drive mechanism includes a motor, a first gear ring arranged on the tube shaft and a second gear ring arranged on the stirring shaft. The motor shaft of the motor is provided with a first gear and a second gear. The first gear is meshed with the first gear ring, and the second gear ring is connected to the second gear ring through a transmission gear.

[0020] The ester hardening process of the modified binder for improving the collapsibility of water glass sand is carried out by using the above-mentioned ester hardening device for improving the collapsibility of water glass sand, and is characterized in that it comprises the following steps:

[0021] S1, ingredients: esters, additives and water glass are added in proportion and mixed and stirred, the additives include disintegrators and accelerators;

[0022] S2, material addition: new sand and old sand are added to the mixing and stirring bin respectively through the first feeding device and the second feeding device, and the product prepared in step S1 is extracted by the extraction feeding device and sent to the mixing and stirring bin, and the first feeding device, the second feeding device and the extraction feeding device are set to a linkage mode, that is, when the first feeding device is feeding, the second feeding device and the extraction feeding device are feeding synchronously, and the proportion of feeding is controlled according to the transmission ratio;

[0023] S3, mixing and reacting: the materials added to the mixing and stirring bin are fully and evenly stirred to form the required water glass sand. During the mixing, the materials are stirred once and then stirred for the second time to obtain water glass sand with high disintegrability and high hardness.

[0024] Compared with the prior art, the advantages of the present invention are as follows: the present invention quantitatively adds ester, promoter, disintegrator and water glass through a batching device and mixes and stirs to form a product, and then uses three feeding devices to respectively add new sand, old sand and the product to a mixing, stirring and hardening device for mixing and hardening to obtain water glass sand with high disintegration and high hardness for casting. When adding materials, the three feeding devices are linked and operated synchronously, which is beneficial to the mixing of raw materials. In addition, the performance of water glass sand is improved by adding esters, promoters and disintegrators. While reducing casting costs and improving casting quality, the amount of water glass is reduced, making the obtained water glass sand more conducive to recycling, effectively reducing waste emissions in the casting process, reducing environmental pollution, breaking through advanced energy-saving and carbon-reduction technologies, and accelerating the development and application of low-carbon smelting technologies. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments, but those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be used as a limitation on the scope of the present invention. In addition, unless otherwise specified, the drawings are only schematically representing the composition or structure of the described objects and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0026] Figure 1 is a stereogram of Example 1;

[0027] Figure 2 is a stereogram of Example 1;

[0028] Figure 3 is a stereogram of Example 1;

[0029] Figure 4 is a cross-sectional view of the mixing, stirring and hardening device in Example 1;

[0030] Figure 5 It is an exploded view of the mixing, stirring and hardening device in Example 1;

[0031] Figure 6 is a three-dimensional diagram of the feeding device in Example 1;

[0032] Figure 7 It is an exploded view of the extractable feeding device in Example 1;

[0033] In the figure: 10, batching device; 20, first feeding device; 201, 501, feeding shaft; 30, third feeding device; 301, mounting frame; 302, first driving mechanism; 3021, driving cylinder; 3022, hinged rod; 303, rotating wheel; 304, hinged arm; 305, switch shaft; 306, piston cylinder; 307, sealing seat; 3071, feeding pipe; 3072, discharging pipe; 3073, piston rod; 40, mixing and hardening device ; 401, stirring shaft; 4010, second gear ring; 4011, spiral blade; 4012, stirring blade; 402, pipe shaft; 4021, first gear ring; 403, stirring drive mechanism; 4031, motor; 4032, first gear; 4033, second gear; 404, conical bucket; 405, S-shaped blade; 50, second feeding device; 01, driving motor; 011, output shaft; 012, bevel gear; 02, bevel gear; 021, gear shaft. DETAILED DESCRIPTION

[0034] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It will be appreciated by those skilled in the art that these descriptions are only illustrative and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0035] Example 1

[0036] Ester hardening device for modified binders to improve the disintegration of water glass sand, such as Figure 1-7 As shown, including,

[0037] The batching device 10 has a batching bin, in which a first stirring device is provided for quantitatively adding esters, water glass and additives and stirring them uniformly;

[0038] A first feeding device 20, which has a first feeding bin and a spiral feeder is provided in the bin for adding new sand;

[0039] The second feeding device 50 has a second feeding bin and a screw feeder is provided in the bin for adding old sand;

[0040] The third feeding device 30 is an extracting feeding device, which is connected to the proportioning bin;

[0041] The mixing and hardening device 40 has a mixing and hardening bin, in which a second stirring device is arranged, and the discharge ends of the first feeding device 20, the second feeding device 50 and the extractable feeding device are all connected to the mixing and hardening bin;

[0042] Among them, two spiral feeders and an extracting feeding device are synchronously driven by a driving device so that when feeding, water glass, sand, esters and additives are synchronously added to the mixing and stirring bin in equal proportions. This solution uses a batching device 10 to quantitatively add esters, promoters, disintegrators and water glass and mix and stir to form a product, and then uses three feeding devices to respectively add new sand, old sand and the product to a mixing, stirring and hardening device 40 for mixing and hardening to obtain water glass sand with high disintegration and high hardness for casting. When adding materials, the three feeding devices are linked and synchronized, which is conducive to the mixing of raw materials. In addition, the performance of water glass sand is improved by the addition of esters, promoters and disintegrators. While reducing casting costs and improving the quality of castings, the amount of water glass is reduced, making the obtained water glass sand more conducive to recycling, effectively reducing waste emissions in the casting process, reducing environmental pollution, breaking through advanced technologies for energy conservation and carbon reduction, and accelerating the development and application of low-carbon smelting technologies.

[0043] Preferably, the extractable feeding device includes a hollow sealing seat 307, a feed pipe 3071 arranged on the top of the sealing seat 307, a discharge pipe 3072 arranged on the left side of the sealing seat 307, a piston cylinder 306 arranged on the right side of the sealing seat 307 and a switch shaft 305 rotatably arranged in the sealing seat 307, sealing rings are arranged on both sides of the switch shaft 305 for forming a seal with the inner wall of the sealing seat 307, the feed pipe 3071 is connected with the proportioning bin, the discharge pipe 3072 is connected with the mixing and stirring bin, a T-shaped three-way channel is arranged on the switch shaft 305, one end of the switch shaft 305 extends out of the sealing seat 307 and is provided with a first driving mechanism 302 that drives it to rotate back and forth 90 degrees, a piston rod 3073 is arranged in the piston cylinder 306, and the outer end of the piston rod 3073 is provided with a transmission mechanism that drives it to extend and retract, and the transmission mechanism and the two spiral feeders are driven synchronously. The extraction-type feeding device includes two processes of extraction and pushing. When extracting, the three-way channel connects the proportioning bin and the piston cylinder 306, and the piston rod 3073 in the piston cylinder 306 moves outward to draw the raw materials into the piston cylinder 306. When pushing, the switch shaft 305 is rotated ninety degrees to connect the piston cylinder 306 and the discharge pipe 3072, and the piston rod 3073 in the piston cylinder 306 moves inward to push the extracted raw materials into the discharge pipe 3072. The discharge pipe 3072 is connected to the mixing bin to push the raw materials into the mixing bin.

[0044] Preferably, the transmission mechanism includes a mounting frame 301, a rotating wheel disc 303 disposed on the mounting frame 301, an articulated arm 304 is hinged at an eccentric position on the rotating wheel disc 303, the other end of the articulated arm 304 is rotatably connected to the outer end of the piston rod 3073, and the rotating wheel disc 303 and the two spiral feeders are synchronously driven. When the rotating wheel disc 303 rotates, the articulated arm 304 is driven to move, thereby driving the piston rod 3073 to telescopic movement.

[0045] Preferably, it also includes a driving motor 01, and the two spiral feeders are each provided with a feed shaft 201, 501, and the two feed shafts 201, 501 are connected by sprocket transmission, and one of the two feed shafts 201, 501 is connected by transmission to the output shaft 011 of the driving motor 01, and the end of the output shaft 011 is provided with a bevel gear 012 and meshed with a bevel gear 02, and the bevel gear 02 has a gear shaft 021, and the gear shaft 021 is connected by transmission to the rotating wheel disc 303. The driving motor 01 drives the two feed shafts 201, 501 to rotate synchronously, and at the same time, the transmission direction is changed by the bevel gear 02 and the bevel gear 012, and then the transmission is transmitted to the rotating wheel disc 303 to drive the rotating wheel disc 303 to rotate, wherein the rotating wheel disc 303 and the gear shaft 021 can be connected by setting a set of sprocket transmission.

[0046] Preferably, the first driving mechanism 302 includes a driving cylinder 3021 rotatably mounted on the mounting frame 301 and a hinge rod 3022 rotatably mounted on the end of the driving cylinder 3021, the end of the hinge rod 3022 is fixedly connected to the outer end of the switch shaft 305, a magnetic steel block is provided on the rotating wheel 303, a Hall sensor is provided on the mounting frame 301, and the Hall sensor is electrically connected to the control unit of the driving cylinder 3021. The first driving mechanism 302 in this solution is used to drive the switch shaft 305 to rotate. In addition, the Hall sensor and the magnetic steel block provided on the rotating wheel 303 are used to sense the position of the rotating wheel 303. When the Hall sensor senses the magnetic steel block, a signal is transmitted to the control unit of the driving cylinder 3021 to control the extension and contraction of the driving cylinder 3021 and rotate the switch shaft 305 to open different channels for drawing or pushing materials.

[0047] Preferably, the second stirring device comprises an external stirring device disposed in the stirring bin, the external stirring device has a feeding channel inside, the first feeding device 20, the second feeding device 50 and the third feeding device 30 all feed into the feeding channel, an internal stirring device is disposed in the feeding channel, and the external stirring device and the internal stirring device are driven to rotate in opposite directions by the stirring driving mechanism 403. Bidirectional stirring can fully mix the new sand, the old sand, the reagent and the ester, so that the final water glass sand has a uniform texture.

[0048] Preferably, the external stirring device includes a circular tubular shaft 402 on the lower side and a conical bucket 404 arranged on the top of the shaft 402. The shaft 402 is rotatably matched with the mixing and stirring bin and extends out of the mixing and stirring bin to be driven to rotate by a stirring drive mechanism 403.

[0049] Preferably, the internal stirring device includes a stirring shaft 401 that rotates with the mixing and stirring bin and extends out of the mixing and stirring bin and is driven by a stirring drive mechanism 403. The upper part of the stirring shaft 401 is provided with a right-angled trapezoidal stirring blade 4012, and the stirring blade 4012 is located in the conical bucket 404. The lower part of the stirring shaft 401 is provided with a spiral blade 4011, and the spiral blade 4011 is located in the pipe shaft 402. The lower outer wall of the pipe shaft 402 is provided with two S-shaped blades 405, and the bottom end of the S-shaped blade 405 is located at the bottom surface of the mixing and stirring bin. The S-shaped blade 405 stirs the material for the second time.

[0050] Preferably, the stirring drive mechanism 403 includes a motor 4031, a first gear ring 4021 disposed on the tube shaft 402, and a second gear ring 4010 disposed on the stirring shaft 401. The motor 4031 shaft of the motor 4031 is provided with a first gear 4032 and a second gear 4033. The first gear 4032 is meshed with the first gear ring 4021, and the second gear ring 4010 is connected to the second gear ring 4010 through a transmission gear. This scheme is a specific structure of the stirring drive mechanism 403.

[0051] Example 2

[0052] The ester hardening process of the modified binder for improving the collapsibility of water glass sand is carried out by using the above-mentioned ester hardening device for improving the collapsibility of water glass sand, and is characterized in that it comprises the following steps:

[0053] S1, ingredients: esters, additives and water glass are added in proportion and mixed and stirred, the additives include disintegrators and accelerators;

[0054] S2, material addition: new sand and old sand are added to the mixing and stirring bin respectively through the first feeding device and the second feeding device, and the product prepared in step S1 is extracted by the extraction feeding device and sent to the mixing and stirring bin, and the first feeding device, the second feeding device and the extraction feeding device are set to a linkage mode, that is, when the first feeding device adds material, the second feeding device and the extraction feeding device add material synchronously, and the proportion of addition is controlled according to the transmission ratio. For example, when the shaft of the screw feeder in the first feeding device rotates K circles, the shaft of the screw feeder in the second feeding device rotates K1 circles, and the extraction feeding device extracts and adds K2 at the same time, the ratio of K, K1 and K2 is preset through the transmission ratio so that the ratio of the material added when the three rotate K, K1 and K2 circles is the required ratio;

[0055] S3, mixing and reacting: the materials added to the mixing and stirring bin are fully and evenly stirred to form the required water glass sand. During mixing, the materials are fed and stirred once, and then stirred for the second time to obtain water glass sand with high disintegration and high hardness. This step is carried out using the mixing, stirring and hardening device in Example 1. The raw materials are all added to the conical bucket and stirred for the first time inside, and then fall into the outer area and are stirred for the second time by the S-shaped blades.

[0056] The above is an introduction to the ester hardening device and process of the modified binder for improving the disintegration of water glass sand provided by the present invention. The principle and implementation method of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the present invention and its core ideas. It should be pointed out that for ordinary technicians in this technical field, the present invention can also be improved and modified without departing from the principle of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. An ester curing device for a modified binder for improving the disintegration of water glass sand, characterized in that: The method comprises a batching device, which has a batching bin, in which a first stirring device is arranged, which is used for quantitatively adding esters, water glass and additives and stirring them evenly; A first feeding device, which has a first feeding bin and a spiral feeder is arranged in the bin for adding new sand; The second feeding device has a second feeding bin and a spiral feeder is arranged in the bin for adding old sand; The third feeding device is a draw-out feeding device, which is connected to the proportioning bin; The mixing and hardening device comprises a mixing and stirring bin, in which a second stirring device is arranged, and the discharge ends of the first feeding device, the second feeding device and the extractable feeding device are all connected to the mixing and stirring bin; Among them, two spiral feeders and an extraction-type feeding device are synchronously driven by a driving device so that when feeding, water glass, sand particles, esters and additives are synchronously added into the mixing and stirring bin in equal proportions.

2. The ester curing device for the modified binder for improving the disintegration property of water glass sand according to claim 1, characterized in that: The extractable feeding device includes a hollow sealing seat, a feed pipe arranged on the top of the sealing seat, a discharge pipe arranged on the left side of the sealing seat, a piston cylinder arranged on the right side of the sealing seat and a switch shaft rotatably arranged in the sealing seat. Sealing rings are arranged on both sides of the switch shaft for forming a seal with the inner wall of the sealing seat. The feed pipe is connected with the proportioning bin, and the discharge pipe is connected with the mixing and stirring bin. A T-shaped three-way channel is arranged on the switch shaft. One end of the switch shaft extends out of the sealing seat and is provided with a first driving mechanism for driving it to rotate back and forth 90 degrees. A piston rod is arranged in the piston cylinder, and a transmission mechanism for driving it to extend and retract is arranged on the outer end of the piston rod. The transmission mechanism and the two spiral feeders are driven synchronously.

3. The ester curing device for the modified binder for improving the disintegration property of water glass sand according to claim 2, characterized in that: The transmission mechanism includes a mounting frame and a rotating wheel set on the mounting frame. An articulated arm is hinged at an eccentric position on the rotating wheel. The other end of the articulated arm is rotatably connected to the outer end of the piston rod. The rotating wheel and the two spiral feeders are driven synchronously.

4. The ester curing device for the modified binder for improving the disintegration property of water glass sand according to claim 3, characterized in that: It also includes a driving motor. Both spiral feeders have a feed shaft. The two feed shafts are connected by a sprocket. One of the two feed shafts is connected by a sprocket. The end of the output shaft is provided with a bevel gear and meshed with a bevel gear. The bevel gear has a gear shaft and the gear shaft is connected by a rotating wheel.

5. The ester curing device for the modified binder for improving the disintegration property of water glass sand according to claim 4, characterized in that: The first driving mechanism includes a driving cylinder rotatably arranged on a mounting frame and a hinged rod rotatably arranged at the end of the driving cylinder, the end of the hinged rod is fixedly connected to the outer end of the switch shaft, a magnetic steel block is arranged on the rotating wheel, a Hall sensor is arranged on the mounting frame, and the Hall sensor is electrically connected to the control unit of the driving cylinder.

6. The ester curing device for the modified binder for improving the disintegration property of water glass sand according to claim 1, characterized in that: The second stirring device includes an external stirring device arranged in the stirring bin, the external stirring device has a feeding channel inside, the first feeding device, the second feeding device and the third feeding device all feed into the feeding channel, an internal stirring device is arranged in the feeding channel, and the external stirring device and the internal stirring device are driven by the stirring driving mechanism to rotate in opposite directions.

7. The ester curing device for the modified binder for improving the disintegration property of water glass sand according to claim 6, characterized in that: The external stirring device comprises a circular tubular shaft at the lower side and a conical bucket arranged on the top of the shaft. The shaft is rotatably matched with the mixing and stirring bin and extends out of the mixing and stirring bin to be driven to rotate by a stirring driving mechanism.

8. The ester curing device for the modified binder for improving the disintegration property of water glass sand according to claim 7, characterized in that: The internal stirring device includes a stirring shaft which rotates with the mixing and stirring bin and extends out of the mixing and stirring bin and is driven by a stirring drive mechanism. The upper part of the stirring shaft is provided with a right-angled trapezoidal stirring blade and the stirring blade is located in the conical bucket. The lower part of the stirring shaft is provided with a spiral blade and the spiral blade is located in the pipe shaft. Two S-shaped blades are provided on the lower outer wall of the pipe shaft, and the bottom end of the S-shaped blade is located at the bottom surface of the mixing and stirring bin.

9. The ester curing device for the modified binder for improving the disintegration property of water glass sand according to claim 8, characterized in that: The stirring drive mechanism includes a motor, a first gear ring arranged on the tube shaft and a second gear ring arranged on the stirring shaft. The motor shaft of the motor is provided with a first gear and a second gear. The first gear is meshed with the first gear ring, and the second gear ring is connected to the second gear ring through a transmission gear.

10. An ester hardening process for a modified binder for improving the disintegration of water glass sand, which is carried out using an ester hardening device for a modified binder for improving the disintegration of water glass sand according to any one of claims 1 to 9, characterized in that: The following steps are included: S1, ingredients: esters, additives and water glass are added in proportion and mixed and stirred, the additives include disintegrators and accelerators; S2, material addition: new sand and old sand are added to the mixing and stirring bin respectively through the first feeding device and the second feeding device, and the product prepared in step S1 is extracted by the extraction feeding device and sent to the mixing and stirring bin, and the first feeding device, the second feeding device and the extraction feeding device are set to a linkage mode, that is, when the first feeding device is feeding, the second feeding device and the extraction feeding device are feeding synchronously, and the proportion of feeding is controlled according to the transmission ratio; S3, mixing and reacting: the materials added to the mixing and stirring bin are fully and evenly stirred to form the required water glass sand. During the mixing, the materials are stirred once and then stirred for the second time to obtain water glass sand with high disintegrability and high hardness.

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