Highly disintegrating water glass sand manufacturing device and process

Abstract

The present invention discloses a device and process for manufacturing high-disintegrability water glass sand, wherein the manufacturing device includes a multi-stage crushing device, a sand mixing device, and a hardening mold. In this application, the raw materials are crushed by a jaw crusher and a cone crusher, and then added to the sand mixing device through a conveyor for mixing and stirring with water glass. While stirring, a modifying agent is added to improve the hardness and disintegration of the water glass sand. Finally, the product is placed in a mold to harden it and then demolded. During the stirring process, the stirring blades rotate and rise and fall horizontally with the stirring frame. At the same time, the stirring blades rotate in the vertical direction, realizing multi-dimensional stirring, ensuring uniform mixing of the materials and reagents, and uniformly improving the hardness and disintegration of the final product.

Description

Technical Field

[0001] The present invention relates to a device and process for manufacturing foundry sand, and in particular to a device and process for manufacturing high-collapse water glass sand. Background Art

[0002] In the casting process, water glass sand is widely used because of its colorless and odorless nature, low price, and easy operation.

[0003] However, with the development of green and clean casting technology, traditional water glass sand, as a unique casting material, is no longer suitable for current production process requirements due to its significant disadvantages such as low sand mold strength, high water content, easy moisture absorption, poor hardening in winter, and poor sand core collapsibility. The patent with application number CN201811081663.5 discloses a high-temperature resistant foundry sand and its production process. Its specification records "S1. Ball-mill the bentonite, fly ash, zircon sand, corundum sand, high-alumina bauxite, glass fiber, magnesia, silica sand, water glass sand, cement, kaolin, silica powder, and carbon powder in the said proportions so that they can pass through a 300-mesh standard sieve, dry and mix to obtain raw material A; S2. Heat the water in the said proportion to 50°C, add the corresponding proportions of adhesive, phenolic resin, and potassium dichromate, stir evenly, put into a mixer and stir for 12 minutes to obtain mortar water, and maintain the mixer speed at 500r / m; S3. Put the mortar water obtained in S2 and the raw material A obtained in S1 into a mixer together, mix and stir for 40 minutes to obtain high-temperature resistant foundry sand."

[0004] It can be seen from this that in order to improve the disintegration and hardness of water glass sand, it is necessary to add reagents to improve the performance of water glass sand during mixing, such as adding disintegrating agents and other additives to increase the disintegration and hardness of water glass sand. The addition of reagents requires uniform stirring. During the stirring process, local uneven stirring or uneven stirring up and down may occur, resulting in poor uniformity of the final product and performance differences. Summary of the Invention

[0005] Based on the shortcomings of the prior art in which when reagents are added to increase the disintegration and hardness of water glass sand, uneven mixing and stirring are likely to occur, resulting in poor uniformity of the finished product and performance differences, the present invention provides a highly disintegrating water glass sand manufacturing device and process.

[0006] The technical solution adopted by the present invention to solve the above technical problems is: a high-disintegrability water glass sand manufacturing device, including a crushing device and a sand mixing device. The crushing device crushes the material and then mixes the material with the sand mixing device to produce high-disintegrability water glass sand. The sand mixing device includes:

[0007] The mixing bin is a hollow cylindrical structure with a discharge port on its side wall and a first track on its inner wall. The first track is a groove-shaped structure with two opposite high points and two opposite low points. The high points and the low points are staggered and transitioned between the high points and the low points through a smooth curved surface. When the first track is unfolded, it presents a sine wave structure.

[0008] The stirring frame has two wheel frames on its top, which extend to the first track and are provided with running wheels extending into the first track, stirring blades on its side, and a sliding seal at its bottom that penetrates the stirring chamber and extends out of the stirring chamber;

[0009] A driving device is connected to the bottom of the stirring frame and keeps the stirring frame in a driving state when the stirring frame is raised or lowered.

[0010] The reagent adding device is connected to the stirring chamber and is used for adding reagents.

[0011] Preferably, the stirring frame includes a mounting frame at the top, a cylindrical transmission column at the bottom, and a plurality of stirring frame rods arranged between the mounting frame and the transmission column to connect the two. The stirring frame rod is a groove-shaped structure to form an installation space in the middle. A cylindrical lifting column is rotatably provided at the installation space. The bottom of the lifting column passes through the transmission column and is provided with a square head. The bottom of the mixing chamber is provided with a limiting structure for limiting the lifting column. The limiting mechanism has a square hole for the square head to extend into and slide vertically. The square hole limits the lifting column and restricts the rotation of the lifting column; the outer wall of the lifting column is provided with a plurality of second tracks with the same structure as the first track, the stirring blade is rotatably arranged on the stirring frame rod and the rotating shaft of the stirring blade extends into the inner side of the stirring frame rod and is connected to an L-shaped transmission rod. The end of the transmission rod is provided with a walking wheel extending into the second track. The stirring frame drives the stirring blade to rotate, and at the same time, the transmission rod drives the stirring blade to rotate.

[0012] Preferably, four stirring rack rods are provided and evenly distributed in a circular array, and at least one second track is provided in the vertical direction.

[0013] Preferably, a transmission ring gear is provided at the bottom of the transmission column, and the driving device includes a driving motor and a driving gear arranged on the output end of the driving motor. The driving gear is engaged with the transmission ring gear and the height of the transmission ring gear is greater than the height of the driving gear so that when the transmission ring gear follows the lifting and lowering of the stirring frame, the driving gear and the transmission ring gear are always engaged.

[0014] Preferably, an inner gear ring is further provided on the transmission column, and a mixing drum is provided on the inner wall of the mixing bin for rotation. The mixing drum divides the space on the upper side of the mixing bin into an inner cavity and an outer cavity. The outer wall of the mixing drum is provided with spiral blades, and the upper side wall of the mixing drum is provided with a through hole connecting the inner cavity and the outer cavity; a connecting cross bar is provided on the lower side of the inner wall of the mixing drum, and an outer gear ring is provided on the inner end of the connecting cross bar, and the outer gear ring is sleeved on the inner gear ring. When the transmission column rotates and rises and falls, the inner gear ring and the outer gear ring are always engaged to drive the mixing drum to rotate, and a gap is provided between the mixing drum and the bottom of the mixing bin for allowing materials to pass through.

[0015] Preferably, the inner wall of the mixing chamber is provided with a circular hanging platform, the hanging platform is provided with an annular groove, the top of the mixing drum is connected to a hanging ring through a connecting rod, the hanging ring is hung on the hanging platform and the hanging ring has an annular protrusion extending into the annular groove, and a bearing is provided between the annular protrusion and the side wall of the groove.

[0016] Preferably, a discharge hopper is provided on the outer side wall of the mixing bin, an opening is provided above the discharge hopper, an insert plate driven by a cylinder is provided at the opening, and the insert plate extends from the opening into the discharge hopper to adjust the discharge speed.

[0017] Preferably, the crushing device includes a vibrating feeder, a jaw crusher and a cone crusher. The discharge end of the vibrating feeder is connected to the jaw crusher, and the material is transferred between the jaw crusher and the cone crusher through a conveying device.

[0018] Preferably, a cover is provided at the bottom of the mixing bin, which covers the driving gear and the transmission gear ring inside, the driving motor is arranged outside the cover, and the square hole is arranged on the cover.

[0019] The manufacturing process of high-disintegrability water glass sand includes the following steps:

[0020] S1, batching and mixing: The ore raw material is crushed multiple times and filtered through a 300-mesh standard sieve to obtain silica sand. The filtered silica sand, water glass, and hardener are then mixed and added to the above-mentioned high-disintegration water glass sand manufacturing device for uniform mixing. During the mixing, the disintegrating agent and other additives are added. During the mixing, the stirring frame of the high-disintegration water glass sand manufacturing device is raised and lowered in the vertical direction and rotated in the horizontal direction. At the same time, the stirring blades rotate on their own, thereby uniformly mixing all materials at various locations in the mixing chamber;

[0021] S2, hardening: adding the material mixed evenly in step S1 into the mold and adding a small amount of hardener to harden it;

[0022] S3, demoulding: demoulding is performed after the sand material hardens to the required degree.

[0023] Compared with the prior art, the advantages of the present invention are as follows: the raw materials are crushed by a jaw crusher and a cone crusher and then added to a sand mixing device through a conveyor for mixing and stirring with water glass, and a modifying agent is added while stirring to improve the hardness and disintegration of the water glass sand. After stirring, the raw materials are fed to a sand making machine for sand making, and finally the product is placed in a mold to harden it and then demolded. During the stirring process, the stirring blades rotate and rise and fall horizontally with the stirring frame, and at the same time, the stirring blades rotate in the vertical direction, realizing multi-dimensional stirring, ensuring uniform mixing of the materials and reagents, and uniformly improving the hardness and disintegration of the final product. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be described in further detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and should not be construed as limiting the scope of the present invention. Furthermore, unless otherwise specified, the drawings are merely schematic representations of the composition or structure of the depicted objects and may contain exaggerated representations. Furthermore, the drawings are not necessarily drawn to scale.

[0025] Figure 1 A side view of the present application;

[0026] Figure 2 A perspective view of this application;

[0027] Figure 3 This is an exploded view of the sand mixing device;

[0028] Figure 4 Schematic diagram of the internal structure of the sand mixing device;

[0029] Figure 5 Schematic diagram of the structure of the stirring frame;

[0030] In the figure: 10, vibrating feeder; 20, jaw crusher; 30, cone crusher; 40, sand mixing device; 401, mixing chamber; 4011, first track; 4012, discharge hopper; 402, mixing frame; 4021, wheel frame; 4022, mounting frame; 4023, transmission column; 40231, inner ring gear; 40232, transmission ring gear; 4024, mixing frame rod; 4025, mixing blade; 4026, transmission rod; 4027, lifting column; 40271, second track; 40272, square head; 403, mixing drum; 4031, through hole; 4032, connecting crosspiece; 4033, outer ring gear; 4034, spiral blade; 50, driving device; 501, driving motor; 502, driving gear. DETAILED DESCRIPTION

[0031] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely illustrative and exemplary and should not be construed as limiting the scope of protection of the present invention. Example

[0032] Highly disintegrating water glass sand manufacturing device, such as Figure 1-5 As shown, it includes a crushing device and a sand mixing device 40. The crushing device crushes the material and then mixes the material through the sand mixing device 40 to produce highly disintegrating water glass sand. The sand mixing device 40 includes:

[0033] The mixing chamber 401 is a hollow cylindrical structure having a discharge port on its side wall and a first track 4011 on its inner wall. The first track 4011 is a groove-shaped structure having two opposite high points and two opposite low points. The high points and the low points are arranged alternately and transitioned by a smooth curved surface. When the first track 4011 is unfolded, it has a sinusoidal waveform structure.

[0034] The stirring frame 402 is provided with two wheel frames 4021 on the top, which extend to the first track 4011 and are provided with running wheels extending into the first track 4011. A stirring blade 4025 is provided on the side, and a sliding seal at the bottom thereof penetrates the stirring chamber 401 and extends out of the stirring chamber 401. During stirring, the stirring frame 402 rotates so that the wheel frames 4021 rotate accordingly, and the two running wheels on the two wheel frames 4021 move in the first track 4011. During the movement, the two running wheels are always at the same height. Therefore, the wheel frames 4021 are collinearly arranged, and the height change of the running wheels drives the entire stirring frame 402 to rise and fall, thereby achieving horizontal stirring while realizing the adjustment of the height of the stirring frame 402, thereby making the stirring and mixing more uniform;

[0035] A driving device 50 is connected to the bottom of the stirring frame 402 and keeps the stirring frame 402 in a driving state when the stirring frame 402 is raised or lowered.

[0036] The reagent adding device is connected to the stirring chamber 401 and is used to add reagents. The reagents are added according to the required performance of the finished product.

[0037] Preferably, the stirring frame 402 includes a mounting frame 4022 at the top, a cylindrical transmission column 4023 at the bottom, and a plurality of stirring frame rods 4024 arranged between the mounting frame 4022 and the transmission column 4023 to connect the two. The stirring frame rod 4024 is a groove-shaped structure to form an installation space in the middle. A cylindrical lifting column 4027 is rotatably provided at the installation space. The bottom of the lifting column 4027 passes through the transmission column 4023 and is provided with a square head 40272. A limiting structure for limiting the lifting column 4027 is provided at the bottom of the stirring chamber 401. The limiting mechanism has the function of allowing the square head 40272 to extend into and slide vertically. The square hole is movable, and the square hole limits the lifting column 4027 to restrict the rotation of the lifting column 4027; the outer wall of the lifting column 4027 is provided with a plurality of second tracks 40271 with the same structure as the first track 4011, and the stirring blade 4025 is rotatably set on the stirring frame rod 4024 and the rotating shaft of the stirring blade 4025 extends into the inner side of the stirring frame rod 4024 and is connected to an L-shaped transmission rod 4026, and the end of the transmission rod 4026 is provided with a walking wheel extending into the second track 40271, and the stirring frame 402 drives the stirring blade 4025 to rotate, and at the same time, the transmission rod 4026 drives the stirring blade 4025 to rotate. This solution sets a second track 40271 and rotatably sets a stirring blade 4025 on the stirring frame 402. The stirring blade 4025 is driven by a transmission rod 4026 and a walking wheel set on the transmission rod 4026 to rotate. Since the rotation is in the vertical direction, the rotation further upgrades the lifting and stirring, so that each position can be stirred evenly.

[0038] Preferably, four stirring rack rods 4024 are provided and evenly distributed in a circular array, and at least one second track 40271 is provided in the vertical direction. In this embodiment, the provision of four stirring rack rods 4024 and their circular array arrangement increases the clearance between stirring blades 4025, preventing the stirring blades 4025 from interfering with each other. This also increases the clearance between the stirring blades 4025, reducing the resistance of the stirring blades 4025 and avoiding the problem of excessive density of the stirring blades 4025 causing mutual interference and excessive resistance.

[0039] Preferably, a transmission ring gear 40232 is provided at the bottom of the transmission column 4023, and the driving device 50 includes a driving motor 501 and a driving gear 502 arranged on the output end of the driving motor 501. The driving gear 502 is engaged with the transmission ring gear 40232 and the height of the transmission ring gear 40232 is greater than the height of the driving gear 502 so that when the transmission ring gear 40232 follows the rise and fall of the stirring frame 402, the driving gear 502 is always engaged with the transmission ring gear 40232. This solution achieves transmission by setting up a meshing drive gear 502 and a transmission ring gear 40232, and the meshing state can be maintained when the stirring frame 402 is raised or lowered. In addition, for stability, an intermediate ring gear with straight tooth splines on both sides can be set between the drive gear 502 and the transmission ring gear 40232. The drive gear 502 meshes with the teeth on the outer wall of the intermediate ring gear, and the transmission ring gear 40232 meshes with the teeth on the inner wall of the intermediate ring gear. The intermediate ring gear is then rotated and set at the bottom of the stirring chamber 401, which can improve the stability of the entire transmission structure. In this embodiment, the drive motor 501 drives the drive gear 502 to rotate through a pulley assembly, that is, a set of pulleys are set on the output shaft of the drive motor 501 and the gear shaft of the drive gear 502, and a belt is set for transmission. The pulleys are located outside the cover, and the cover is located at the bottom of the stirring chamber 401.

[0040] Preferably, an inner gear ring 40231 is further provided on the transmission column 4023, and a mixing drum 403 is rotatably provided on the inner wall of the mixing chamber 401. The mixing drum 403 divides the space on the upper side of the mixing chamber 401 into an inner cavity and an outer cavity. The outer wall of the mixing drum 403 is provided with a spiral blade 4034, and the upper side wall of the mixing drum 403 is provided with a through hole 4031 connecting the inner cavity and the outer cavity; a connecting cross piece 4032 is provided on the lower side of the inner wall of the mixing drum 403, and an outer gear ring 4033 is provided at the inner end of the connecting cross piece 4032, and the outer gear ring 4033 is sleeved on the inner gear ring 40231. When the transmission column 4023 rotates and rises and falls, the inner gear ring 40231 and the outer gear ring 4033 are always engaged to drive the mixing drum 403 to rotate, and a gap is provided between the mixing drum 403 and the bottom of the mixing chamber 401 for allowing materials to pass through. Since the stirring blade 4025 rotates, a certain gap needs to be reserved between it and the side wall of the stirring chamber 401. Uneven stirring is prone to occur in the reserved gap. In this solution, a stirring drum 403 driven by a stirring frame 402 is arranged to rotate on the side wall of the stirring chamber 401, and a spiral blade 4034 is arranged on the outer wall of the stirring drum 403 to stir the material upward. After stirring, the material falls into the inner side of the stirring drum 403 from the through hole 4031, thereby solving the problem of uneven stirring at the edge.

[0041] Preferably, the inner wall of the mixing chamber 401 is provided with a circular mounting platform with an annular groove. The top of the mixing drum 403 is connected to a mounting ring via a connecting rod. The mounting ring is suspended from the mounting platform and has an annular protrusion that extends into the annular groove. A bearing is provided between the annular protrusion and the sidewall of the groove. This solution provides a rotational connection for the mixing drum 403.

[0042] Preferably, a discharge hopper 4012 is provided on the outer wall of the mixing chamber 401. An opening is provided above the discharge hopper 4012. An insert plate driven by a cylinder is provided at the opening. The insert plate extends from the opening into the discharge hopper 4012 to adjust the discharge speed. When the insert plate is fully inserted, the discharge port of the discharge hopper 4012 is completely blocked. When discharge is required, the discharge speed is adjusted by the depth of insertion of the insert plate.

[0043] Preferably, the crushing device includes a vibrating feeder 10, a jaw crusher 20, and a cone crusher 30. The discharge end of the vibrating feeder 10 is connected to the jaw crusher 20, and a conveying device is used to transfer materials between the jaw crusher 20 and the cone crusher 30. In this solution, ore and the like are fed to the jaw crusher 20 through the vibrating feeder 10 for primary crushing, and then transported to the cone crusher 30 for secondary crushing to particles of the desired particle size.

[0044] Preferably, a cover is provided at the bottom of the mixing chamber 401, which encloses the drive gear 502 and the transmission ring gear 40232. The drive motor 501 is disposed outside the cover, and a square hole is provided on the cover. This solution encloses the transmission part within the cover, which improves safety and also protects the transmission part. Example

[0045] The manufacturing process of high-disintegrability water glass sand includes the following steps:

[0046] S1, batching and mixing: The ore raw material is crushed multiple times and filtered through a 300-mesh standard sieve to obtain silica sand. The filtered silica sand, water glass, and hardener are then mixed and added to the high-disintegrability water glass sand manufacturing device described in Example 1 for uniform mixing. The disintegrating agent and other additives are added while mixing. During the mixing, the stirring frame of the high-disintegrability water glass sand manufacturing device is raised and lowered vertically and rotated horizontally. At the same time, the stirring blades rotate, thereby uniformly mixing the materials at all locations in the mixing chamber.

[0047] S2, hardening: adding the material mixed evenly in step S1 into the mold and adding a small amount of hardener to harden it;

[0048] S3, demoulding: demoulding is performed after the sand material hardens to the required degree.

[0049] This solution adds the materials and stirs them thoroughly before sand mixing, followed by sand mixing, hardening and demoulding steps. This can ensure the uniformity of the mixing of the materials to the greatest extent possible, ensuring that all parts of the finished product have greater strength and high disintegration properties.

[0050] The above is an introduction to the high-disintegrability water glass sand manufacturing device and process provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only intended to help understand the present invention and its core ideas. It should be pointed out that, for those skilled in the art, several improvements and modifications may be made to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A device for producing high-collapsibility water glass sand, comprising a crushing device and a sand mixing device. The crushing device crushes the material and then mixes the material with the sand mixing device to produce high-collapsibility water glass sand. The device is characterized in that: The sand mixing device includes: The mixing bin is a hollow cylindrical structure with a discharge port on its side wall and a first track on its inner wall. The first track is a groove-shaped structure with two opposite high points and two opposite low points. The high points and the low points are staggered and transitioned between the high points and the low points through a smooth curved surface. When the first track is unfolded, it presents a sine wave structure. The stirring frame has two wheel frames on its top, which extend to the first track and are provided with running wheels extending into the first track, stirring blades on its side, and a sliding seal at its bottom that penetrates the stirring chamber and extends out of the stirring chamber; A driving device is connected to the bottom of the stirring frame and keeps the stirring frame in a driving state when the stirring frame is raised or lowered. a reagent adding device, which is connected to the stirring chamber and is used to add reagents; The stirring frame includes a mounting frame at the top, a cylindrical transmission column at the bottom, and a plurality of stirring frame rods arranged between the mounting frame and the transmission column to connect the two. The stirring frame rod is a groove-shaped structure to form an installation space in the middle. A cylindrical lifting column is rotatably provided at the installation space. The bottom of the lifting column passes through the transmission column and is provided with a square head. A limiting structure for limiting the lifting column is provided at the bottom of the mixing bin. The limiting mechanism has a square hole for the square head to extend into and slide vertically. The square hole limits the lifting column and restricts the rotation of the lifting column; the outer wall of the lifting column is provided with a plurality of second tracks with the same structure as the first track, the stirring blade is rotatably arranged on the stirring frame rod and the rotating shaft of the stirring blade extends into the inner side of the stirring frame rod and is connected to an L-shaped transmission rod. The end of the transmission rod is provided with a walking wheel extending into the second track. The stirring frame drives the stirring blade to rotate, and at the same time, the transmission rod drives the stirring blade to rotate.

2. The high-collapse water glass sand manufacturing device according to claim 1, characterized in that: Four stirring rack rods are provided and evenly distributed in a circular array, and at least one second track is provided in the vertical direction.

3. The high-collapse water glass sand manufacturing device according to claim 1, characterized in that: A transmission gear ring is provided at the bottom of the transmission column. The driving device includes a driving motor and a driving gear arranged on the output end of the driving motor. The driving gear is engaged with the transmission gear ring and the height of the transmission gear ring is greater than the height of the driving gear so that when the transmission gear ring follows the lifting and lowering of the stirring frame, the driving gear and the transmission gear ring are always engaged.

4. The high-collapse water glass sand manufacturing device according to claim 1, characterized in that: An inner gear ring is also provided on the transmission column, and a mixing drum is provided on the inner wall of the mixing bin for rotation. The mixing drum divides the space on the upper side of the mixing bin into an inner cavity and an outer cavity. The outer wall of the mixing drum is provided with spiral blades, and the upper side wall of the mixing drum is provided with a through hole connecting the inner cavity and the outer cavity; a connecting cross piece is provided on the lower side of the inner wall of the mixing drum, and an outer gear ring is provided on the inner end of the connecting cross piece. The outer gear ring is sleeved on the inner gear ring. When the transmission column rotates and rises and falls, the inner gear ring and the outer gear ring are always engaged to drive the mixing drum to rotate. A gap is provided between the mixing drum and the bottom of the mixing bin for allowing materials to pass through.

5. The high-collapse water glass sand manufacturing device according to claim 4, characterized in that: The inner wall of the mixing chamber is provided with a circular hanging platform, and the hanging platform is provided with an annular groove. The top of the mixing drum is connected to a hanging ring through a connecting rod. The hanging ring is hung on the hanging platform and has an annular protrusion extending into the annular groove. A bearing is provided between the annular protrusion and the side wall of the groove.

6. The high-collapse water glass sand manufacturing device according to claim 1, characterized in that: A discharge hopper is provided on the outer wall of the mixing bin, an opening is provided above the discharge hopper, an insert plate driven by a cylinder is provided at the opening, and the insert plate extends from the opening into the discharge hopper to adjust the discharge speed.

7. The high-collapse water glass sand manufacturing device according to claim 1, characterized in that: The crushing device includes a vibrating feeder, a jaw crusher and a cone crusher. The discharge end of the vibrating feeder is connected to the jaw crusher, and the material is transported between the jaw crusher and the cone crusher through a conveying device.

8. The high-collapse water glass sand manufacturing device according to claim 3, characterized in that: A cover is provided at the bottom of the mixing bin, which covers the driving gear and the transmission gear ring inside. The driving motor is arranged outside the cover, and the square hole is arranged on the cover.

9. A process for manufacturing high-disintegrability water glass sand, characterized in that: The following steps are involved: S1, batching and mixing: crushing the ore raw material multiple times and screening out silica sand through a 300-mesh standard sieve, then mixing the screened silica sand, water glass, and a hardener and adding them to the highly disintegrating water glass sand manufacturing device according to any one of claims 2 to 8, stirring and mixing them uniformly, adding the disintegrating agent and other additives while stirring, and during the stirring and mixing, the stirring frame of the highly disintegrating water glass sand manufacturing device rises and falls in the vertical direction and rotates in the horizontal direction, while the stirring blades rotate, thereby uniformly mixing the materials at various locations in the stirring chamber; S2, hardening: adding the material mixed evenly in step S1 into the mold and adding a small amount of hardener to harden it; S3, demoulding: demoulding is performed after the sand material hardens to the required degree.

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