Casting sand crushing system

Abstract

The invention relates to a casting sand breaking system which comprises a casting. A first sand vibration machine; a transport mechanism; a sand discharging mechanism; the sand crushing assembly is arranged at the upper part of the first sand vibrating machine and is used for crushing blocky molding sand attached to the casting by virtue of downward pressure; the sand crushing assembly comprises a support; a top seat; a support table; linear driving; the crushing rod is a rod-shaped assembly connected to the supporting table and perpendicular to the first sand vibration machine, and the crushing rod makes contact with the casting by means of movement of the supporting table and crushes the blocky molding sand attached to the surface of the casting. And stripping of molding sand on the surface of a casting and crushing of caked molding sand on the first sand vibrating machine are achieved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the special equipment for metallurgical casting, and particularly relates to a casting sand breaking system. BACKGROUND

[0002] Sand casting (also known as sand mold casting) is a metal forming process with a long history. Its core principle is to use sand mold as a disposable mold to pour molten metal liquid into it, and then take out the casting by destroying the sand mold after the metal cools and solidifies. The essence of this process is to achieve the economic production of complex geometric metal components by precisely controlling the performance of sand mold materials (such as strength and air permeability) and process parameters (such as pouring temperature). Compared with other casting methods, the core advantage of sand casting is low mold cost and strong adaptability, which can produce castings from a few grams to hundreds of tons. After the casting is formed, sand will adhere to the side of the casting. The existing process generally uses a sand shaker to make the casting move while the sand adhering to the surface of the casting falls off by vibration. For example, CN201220670627.4 Protective sand shaker or CN202223104324.9 A new type of vibration sand falling machine discloses a device that uses vibration to strip the sand from the side of the casting. At the same time, the sand shaker / falling machine uses eccentric vibration to achieve the lateral movement of the casting on the working surface.

[0003] The inventor found two problems in the existing technology during the research: 1) Since the casting is a rigid component, it may have a certain brittle fracture in high-frequency vibration, so during the vibration sand falling process, the sand falling efficiency cannot be improved by increasing the vibration amplitude, and the sprue in sand casting often breaks during vibration, which becomes the culprit of damaging the casting during the overall lateral movement; 2) Because large amplitude vibration cannot be used to avoid damage to the casting, there is often a part of the sand that is clumped and cannot be stripped from the casting, or although it is stripped from the casting, the casting sprue is too small to allow the casting sprue to separate from the casting and mix with the sand in the sand collection system, so the clumped sand cannot be processed and is taken to the next station, affecting the production of the next station.

[0004] Therefore, there is an urgent need for a technical solution to overcome the problems in the prior art and process clumped sand. SUMMARY

[0005] In order to overcome the technical problems that the agglomerated sand is not easy to process in the vibration shakeout process in the prior art, the inventor installs a sand breaking device on the upper side of the sand shaker, uses the knocking of multiple contacts to realize the peeling of the agglomerated sand from the casting, and solves the problem that the sand cannot be screened and fallen on the sand shaker. The inventor finds in the research on the prior art that although the sand will agglomerate, it will not be hardened, and only a small force is needed, and the vibration of the sand shaker is matched, so that the sand can be peeled and screened. The technical scheme of the present application is as follows: a casting sand breaking system comprises:

[0006] The casting is a workpiece formed by a sand casting process, and the casting is attached with sand on the peripheral side when entering the casting sand breaking system;

[0007] The first sand shaker is a device for peeling the sand on the peripheral side of the casting by vibration;

[0008] The conveying mechanism is sequentially communicated with the first sand shaker and receives the casting transmitted by the first sand shaker;

[0009] The sand discharging mechanism is a mechanism for receiving the sand peeled from the casting under the action of the vibration of the first sand shaker and falling and discharging outside through the sieve hole arranged on the first sand shaker;

[0010] Further comprising:

[0011] The sand breaking assembly is arranged on the upper side of the first sand shaker and breaks the blocky sand attached to the casting by downward pressure;

[0012] The sand breaking assembly comprises:

[0013] The support is a frame arranged on the lateral side of the first sand shaker;

[0014] The top seat is a rigid seat in the form of a plate, and the top seat is located on the upper side of the first sand shaker and is fixedly connected with the support;

[0015] The support table is a plate-shaped piece located between the top seat and the first sand shaker;

[0016] The linear drive is a driving device arranged on the top seat, and the extension end of the linear drive is fixedly connected with the support table, so that the support table can approach or move away from the first sand shaker;

[0017] The breaking rod is connected to the support table and is perpendicular to the rod-shaped assembly of the first sand shaker, and the breaking rod contacts the casting by the movement of the support table to break the blocky sand attached to the surface of the casting.

[0018] Further,

[0019] The breaking rods are multiple groups and are uniformly distributed in an array on the support table.

[0020] Further,

[0021] The first sand shaker and the conveying mechanism further comprise a second sand shaker;

[0022] The working surface of the second sand shaker is lower than that of the first sand shaker, and the working surface of the conveying mechanism is lower than that of the second sand shaker;

[0023] The working surfaces of the first sand shaker, the second sand shaker and the conveying mechanism are sequentially connected to convey the castings;

[0024] The sand discharging mechanism synchronously receives the sand screened by the first sand shaker and the second sand shaker.

[0025] Further, the sand breaking assembly further comprises

[0026] The slide rod is fixedly connected to one end of the support table and inserted into the top seat to form a straight guide rod;

[0027] The slide rod is multiple groups and is distributed on the side of the support table.

[0028] Further, the breaking rod comprises:

[0029] The spherical sleeve is fixed on the support table and has a spherical inner side and a through support portion at both ends in the direction of gravity;

[0030] The metal ball is a spherical body embedded in the spherical sleeve, and the metal ball can roll in the spherical sleeve. The metal ball is provided with a through hole;

[0031] The telescopic rod passes through the metal ball and can extend out of both ends of the spherical sleeve;

[0032] The telescopic rod is provided with a breaking head at one end facing the working surface of the first sand shaker and a limiting plate at the other end;

[0033] The limiting plate blocks the telescopic rod from being separated from the metal ball;

[0034] The breaking head moves with the support table, contacts the castings, and breaks the blocky sand attached to the surface of the castings.

[0035] Further,

[0036] A first spring is installed between the breaking head and the spherical sleeve;

[0037] The first spring is sleeved on the outside of the telescopic rod;

[0038] The first spring provides the compression force of the crushing rod during the pressing process and the elastic force for resetting.

[0039] Further,

[0040] The second spring is installed between the limiting plate and the spherical sleeve;

[0041] The second spring sleeve is arranged outside the telescopic rod;

[0042] The second spring provides the elastic force for resetting the crushing rod after the crushing head is connected with the casting hook and supports the crushing head to maintain in a fixed position.

[0043] Further,

[0044] A plurality of groups of the crushing rods are distributed on the support table in a horizontal and vertical alignment mode.

[0045] Further,

[0046] A plurality of groups of the crushing rods are distributed on the support table in a horizontal and vertical staggered mode in the form of a plum blossom pile.

[0047] Further,

[0048] The hole size of the sand screen of the first sand vibrating machine is smaller than the size of the casting sprue after being broken.

[0049] The beneficial effects of the present application relative to the prior art are:

[0050] 1. The sand crushing assembly is pressed to realize the peeling of the sand on the surface of the casting and the crushing of the sand lump on the first sand vibrating machine;

[0051] 2. The plurality of groups of the crushing rods can be adapted to various sizes of castings;

[0052] 3. The second sand vibrating machine is arranged to realize the recycling of the sand after the sand crushing assembly realizes the peeling and crushing purposes;

[0053] 4. The combination of the spherical sleeve and the metal ball forms a universal joint structure, which can realize the flexible contact between the telescopic rod and the casting, and avoid the damage to the corners of the casting during the falling process of the telescopic rod;

[0054] 5. The gravity of the telescopic rod can be used to realize the crushing of the sand and the resetting of the telescopic rod;

[0055] 6. The elastic force of the first spring can be used as a scale for controlling the pressing force and providing the resetting force of the telescopic rod;

[0056] 7. The elastic force of the second spring can control the position of the telescopic rod, and when the broken rod is connected with the casting, that is, the broken rod is hung on the casting, the broken rod and the casting can be separated under the vibration action by the vibration force of the sand shaker and the elastic force of the second spring;

[0057] 8. The broken rods are arranged in the form of a plum-blossom pile type in a plurality of groups and in a staggered horizontal and vertical manner, so that the effect of breaking the sand is improved, and the effect is excellent compared with the simple horizontal and vertical alignment form;

[0058] 9. The hole size of the sand screen is smaller than the size of the casting after the runner is broken, so as to avoid damage to the subsequent sand collecting system caused by the runner. BRIEF DESCRIPTION OF DRAWINGS

[0059] Figure 1 It is a front view of the specific embodiment of the present application;

[0060] Figure 2 It is a detail structure diagram of the broken sand assembly of the specific embodiment of the present application;

[0061] Figure 3 It is a detail structure diagram of the broken rod of the specific embodiment of the present application;

[0062] Figure 4 It is a local structure diagram of the broken rod of the specific embodiment of the present application;

[0063] Figure 5 It is a distribution schematic diagram of the broken rod on the support table of the specific embodiment of the present application;

[0064] Among them, the mark represents:

[0065] 100 - first sand shaker; 200 - second sand shaker; 300 - sand discharging mechanism; 400 - conveying mechanism;

[0066] 500 - broken sand assembly; 510 - support; 520 - top seat; 530 - sliding rod; 540 - support table; 550 - linear drive;

[0067] 560 - broken rod; 561 - spherical sleeve; 562 - metal ball; 563 - telescopic rod; 564 - broken head; 565 - first spring;

[0068] 566 - second spring; 567 - limiting plate; DETAILED DESCRIPTION

[0069] The technical solutions in the embodiments are described clearly and completely. Apparently, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0070] In order to overcome the technical problem that the clumped sand is not easy to process in the vibration shakeout process in the prior art, the inventor adds a sand crushing device to the upper side of the sand shaker, uses the knocking of multiple contacts to realize the peeling of the clumped sand from the casting, and solves the problem that the sand cannot be sieved and fallen on the sand shaker. The inventor finds in the research on the prior art that although the sand clumps, it is not hardened, and only needs a small force, and in combination with the vibration of the sand shaker, the peeling and sieving of the sand can be realized.

[0071] Please refer to Figures 1 to 5 , the specific implementation is that a casting sand crushing system comprises:

[0072] The casting is a workpiece formed by a sand casting process, and the casting is attached with sand on the peripheral side when entering the casting sand crushing system; please refer to Figure 1 The casting enters the first sand shaker 100 from the left side, is vibrated for a certain process, and then the sand crushing assembly 500 participates in sand crushing.

[0073] The first sand shaker 100 is a device for peeling the sand on the peripheral side of the casting by vibration.

[0074] The conveying mechanism 400 is sequentially communicated with the first sand shaker 100 and receives the casting transmitted by the first sand shaker 100; in some embodiments, the general conveying mechanism 400 is a scale board machine, which is used for conveying or sorting the casting.

[0075] The sand discharging mechanism 300 is a mechanism for receiving the sand peeled from the casting under the vibration action of the first sand shaker 100 and discharging downward through the sieve hole arranged on the first sand shaker 100; please refer to Figure 1 In this embodiment, the lower side of the first sand shaker 100 is in the form of a funnel, and after falling to the sand discharging mechanism 300, it can be transported out and used for secondary recycling. Therefore, in the conveying process, a flexible conveying belt is generally used for conveying, and the broken sprue is not allowed to enter this system, which can damage the conveying system.

[0076] Please refer to Figure 1 and Figure 2Also includes:

[0077] The broken sand assembly 500 is arranged on the upper part of the first sand shaker 100, and breaks the blocky sand attached to the casting by means of downward pressure.

[0078] The broken sand assembly 500 includes:

[0079] The bracket 510 is a frame arranged on the side of the first sand shaker 100.

[0080] The top seat 520 is a rigid seat in the form of a plate, which is located on the upper side of the first sand shaker 100 and is fixedly connected with the bracket 510. It should be noted that in other embodiments, the bracket 510 can be fixedly connected transversely or supported by a downwardly extending upper part, which should be within the scope of the technical solution.

[0081] The support table 540 is a plate-shaped member located between the top seat 520 and the first sand shaker 100.

[0082] The linear drive 550 is a drive device arranged on the top seat 520, and the telescopic end of the linear drive 550 is fixedly connected with the support table 540, so that the support table 540 can approach or move away from the first sand shaker 100.

[0083] The broken rod 560 is a rod-shaped assembly connected to the support table 540 and perpendicular to the first sand shaker 100, which is in contact with the casting by means of the movement of the support table 540 and breaks the blocky sand attached to the surface of the casting. The present embodiment proposes a technical solution of arranging the broken rod 560 on the upper part of the first sand shaker 100, which breaks the blocky sand or the sand attached to the casting by means of the broken rod 560, thereby realizing the treatment of the sand.

[0084] In some embodiments, in order to improve the breaking efficiency, preferably,

[0085] The broken rod 560 is in multiple groups and is uniformly distributed in an array on the support table 540.

[0086] In other embodiments, please refer to Figure 1 In order to improve the sand removal efficiency,

[0087] The first sand shaker 100 and the conveying mechanism 400 further include a second sand shaker 200.

[0088] The working surface of the second sand shaker 200 is lower than that of the first sand shaker 100, and the working surface of the conveying mechanism 400 is lower than that of the second sand shaker 200.

[0089] The first sand shaker 100, the second sand shaker 200 and the transport mechanism 400 are sequentially connected in working surface to convey the casting;

[0090] The sand discharging mechanism 300 synchronously receives the sand screened by the first sand shaker 100 and the second sand shaker 200.

[0091] In other embodiments, referring to Figure 2 , the sand crushing assembly 500 further comprises

[0092] The slide rod 530 is fixedly connected to the support table 540 at one end and inserted into the top base 520 to form a straight guide rod;

[0093] The slide rod 530 is in multiple groups and distributed around the support table 540.

[0094] In other embodiments, referring to Figure 3 and Figure 4 , the crushing rod 560 comprises:

[0095] The spherical sleeve 561 is fixed to the support table 540 and has a spherical inner side and a through support portion at the upper and lower ends in the direction of gravity;

[0096] The metal ball 562 is a spherical body embedded in the spherical sleeve 561 and can roll in the spherical sleeve 561. The metal ball 562 is provided with a through hole;

[0097] The spherical sleeve 561 and the metal ball 562 form a universal joint structure to allow the telescopic rod 563 to deflect within a certain range. The deflection angle depends on the size of the openings at the upper and lower ends of the spherical sleeve 561. The deflection function is to avoid the telescopic rod 563 from penetrating and rigidly contacting the casting to cause damage to the casting. The deflection function can effectively avoid the weak parts of the casting.

[0098] The telescopic rod 563 passes through the metal ball 562 and can extend out of the upper and lower ends of the spherical sleeve 561;

[0099] The telescopic rod 563 is provided with a crushing head 564 at one end facing the working surface of the first sand shaker 100 and a limiting plate 567 at the other end. Referring to Figure 3 , the crushing head 564 can be a conical surface to increase the pressure and avoid damage to the casting or hooking with the special structure of the casting.

[0100] The limiting plate 567 blocks the telescopic rod 563 from separating from the metal ball 562;

[0101] The breaking head 564 moves with the support table 540 to contact the casting and break the blocky sand attached to the surface of the casting.

[0102] In this embodiment, the telescopic rod 563 and the limiting plate 567 are arranged to allow the telescopic rod 563 to move downward under the action of gravity, and the breaking head 564 is lowered to contact the sand around the side of the casting, so that the breaking is achieved by simply using the gravity of the telescopic rod 563, and the casting is not damaged due to the existence of rigid contact and the brittle damage of the casting.

[0103] In other embodiments, please refer to Figure 3

[0104] The first spring 565 is installed between the breaking head 564 and the spherical sleeve 561.

[0105] The first spring 565 is sleeved outside the telescopic rod 563.

[0106] The first spring 565 provides the compression force and the reset spring force of the breaking rod 560 during the pressing process.

[0107] In other embodiments, please refer to Figure 3 ,

[0108] The second spring 566 is installed between the limiting plate 567 and the spherical sleeve 561.

[0109] The second spring 566 is sleeved outside the telescopic rod 563.

[0110] The second spring 566 provides the reset spring force of the breaking rod 560 after the breaking head 564 is connected with the casting, and supports the breaking head 564 to maintain in a fixed position.

[0111] The above two embodiments can exist independently, or can exist simultaneously like Figure 3 .

[0112] In some embodiments, preferably,

[0113] A plurality of groups of the breaking rod 560 are arranged on the support table 540 in a horizontal and vertical alignment manner.

[0114] In other embodiments, please refer to Figure 5 ,

[0115] Multiple groups of the broken rod 560 are distributed on the support table 540 in a staggered manner in the form of a quincunx. Because the position of the sand clumps or the adhesion on the casting is unknown, the inventor found in the test that the effect of the present embodiment is slightly better than that of the neat layout scheme. The neat layout scheme has a large gap in the center of the four telescopic rods 563, and there is a certain probability that the sand clumps are not broken. In the present technical solution, the spacing of the telescopic rods 563 is the smallest, so that even if there is a missing, the adjacent sand will be disturbed and broken under the action of the vibration force, and become a size that can be sieved.

[0116] In other embodiments, preferably, in order to avoid the influence of the casting sprue on the sand recovery,

[0117] The hole size of the first sand shaker 100 for sieving the sand is smaller than the size of the broken casting sprue. It should be noted that the inventor found in the study of the prior art that the casting sprue is often broken, so the above design can be the key point of the overall invention concept. Because the size of the sieve hole cannot be blindly enlarged to avoid the falling of the sprue, there is a problem that some sand clumps cannot fall. In order to solve the above two problems synchronously, the inventor designs the technical solution corresponding to the above embodiment.

[0118] In specific implementation: the casting enters the first sand shaker 100 from one side, and under the influence of the vibration force of the first sand shaker 100, the sand attached to the peripheral side of the casting will be stripped from the outer surface of the casting, but there will be a certain amount of blocky sand that has not been stripped or still exists in the form of blocks on the working surface of the first sand shaker 100. At this time, the support table 540 drives the broken rod 560 to fall in the broken sand assembly 500, and the end of the broken rod 560, i.e. the broken head 564, will contact the sand clumps on the surface of the casting or the working surface of the first sand shaker 100 under the action of gravity or the elastic force of the spring, break or disturb the sand, so that the sand becomes sievable from the first sand shaker 100 and the second sand shaker 200 under the action of vibration, and enters the sand discharge mechanism 300 as broken sand. The casting passes through the first sand shaker 100 and the second sand shaker 200, and is transported to the next station by the transportation mechanism 400.

[0119] The beneficial effects of the present invention relative to the prior art are as follows: 1. The stripping of the sand on the surface of the casting and the breaking of the sand clumps on the first sand shaker are realized by the downward pressure of the broken sand assembly 500;

[0120] 2. The multiple groups of broken rods 560 can adapt to castings of various sizes;

[0121] 3. The second sand shaker 200 can realize the recovery of the sand after the broken sand assembly achieves the purpose of stripping and breaking;

[0122] 4. The combination of the spherical sleeve 561 and the metal ball 562 forms the structure of the universal joint, which can realize the flexible contact between the telescopic rod 563 and the casting, and avoid the damage to the corners of the casting during the falling of the telescopic rod;

[0123] 5. The gravity of the telescopic rod 563 can be used to realize the crushing of the sand and the resetting of the telescopic rod;

[0124] 6. The elastic force of the first spring 565 can be used as the scale of the control of the downward pressure and the force for resetting the telescopic rod;

[0125] 7. The elastic force of the second spring 566 can be used to control the position of the telescopic rod, and when the crushing rod is connected with the casting, that is, the crushing rod is hung on the casting, the vibration force of the sand shaker and the elastic force of the second spring can be used to separate the crushing rod from the casting under the vibration;

[0126] 8. The multiple groups of the crushing rods 560 are arranged in the form of the plum-blossom pile, which can improve the effect of crushing the sand, and the effect is better than that of the simple horizontal and vertical alignment;

[0127] 9. The size of the hole for screening and falling the sand is smaller than the size of the casting after the runner is broken, which can avoid the damage of the runner to the subsequent sand collecting system.

[0128] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A casting sand breaking system, comprising: a casting, a workpiece shaped by a molding sand casting process, the casting having molding sand attached to the circumference of the casting when entering the casting sand breaking system; a first sand shaker (100), a device for peeling off the molding sand attached to the circumference of the casting by means of vibration; a transport mechanism (400), sequentially connected with the first sand shaker (100) to receive the casting delivered by the first sand shaker (100); a sand discharging mechanism (300), a mechanism for receiving the molding sand peeled off from the casting under the vibration of the first sand shaker (100) and discharging the molding sand through the sieve holes provided on the first sand shaker (100); characterized in that it further comprises: a sand breaking assembly (500), an assembly provided on the upper part of the first sand shaker (100) for breaking the blocky molding sand attached to the casting by means of downward pressure; the sand breaking assembly (500) comprises: a bracket (510), a frame provided on the side of the first sand shaker (100); a top seat (520), a rigid seat in the form of a plate, the top seat (520) being located on the upper side of the first sand shaker (100) and fixedly connected with the bracket (510); a support table (540), a plate-shaped member located between the top seat (520) and the first sand shaker (100); a linear drive (550), a driving device provided on the top seat (520), the telescopic end of the linear drive (550) being fixedly connected with the support table (540) so that the support table (540) can move closer to or away from the first sand shaker (100); a breaking rod (560), a rod-shaped component connected to the support table (540) and perpendicular to the first sand shaker (100), the breaking rod (560) being in contact with the casting by means of the movement of the support table (540) to break the blocky molding sand attached to the surface of the casting.

2. The casting sand breaking system according to claim 1, characterized in that: the breaking rod (560) is in multiple groups and uniformly distributed in an array on the support table (540).

3. The casting sand breaking system according to claim 1, characterized in that: the first sand shaker (100) and the transport mechanism (400) further comprise a second sand shaker (200); the working surface of the second sand shaker (200) is lower than that of the first sand shaker (100), and the working surface of the transport mechanism (400) is lower than that of the second sand shaker (200); the working surfaces of the first sand shaker (100), the second sand shaker (200), and the transport mechanism (400) are sequentially connected to convey the casting; the sand discharging mechanism (300) synchronously receives the molding sand sieved and fallen from the first sand shaker (100) and the second sand shaker (200).

4. The foundry sand reclamation system of claim 1, wherein, the sand breaking assembly (500) further comprises a slide rod (530), a rod with one end fixedly connected with the support table (540) and the other end inserted into the top seat (520) to form a linear guide; the slide rod (530) is in multiple groups and distributed around the circumference of the support table (540).

5. The foundry sand reclamation system of claim 1, wherein, the breaking rod (560) comprises: A spherical sleeve (561) is fixed on the support table (540), with an inner spherical surface and a through hole at both ends in the direction of gravity; A metal ball (562) is embedded in the spherical sleeve (561), which can roll inside the spherical sleeve (561). A through hole is provided in the metal ball (562); A telescopic rod (563) passes through the metal ball (562) and can extend out of the spherical sleeve (561) at both ends; A breaking head (564) is provided at one end of the telescopic rod (563) towards the working surface of the first sanding machine (100), and a limiting plate (567) is provided at the other end; The limiting plate (567) blocks the telescopic rod (563) from coming out of the metal ball (562); The breaking head (564) moves with the support table (540) and contacts the casting to break the blocky sand attached to the surface of the casting.

6. The casting sand breaking system according to claim 5, wherein A first spring (565) is installed between the breaking head (564) and the spherical sleeve (561); The first spring (565) is sleeved outside the telescopic rod (563); The first spring (565) provides compression force and reset resilience during the pressing process of the breaking rod (560).

7. The casting sand breaking system according to claim 5, wherein A second spring (566) is installed between the limiting plate (567) and the spherical sleeve (561); The second spring (566) is sleeved outside the telescopic rod (563); The second spring (566) provides reset resilience and supports the breaking head (564) to maintain in a fixed position after the breaking head (564) is connected with the casting.

8. The casting sand breaking system according to claim 2, wherein Multiple groups of the breaking rod (560) are arranged on the support table (540) in a horizontal and vertical alignment manner.

9. The casting sand breaking system according to claim 2, wherein Multiple groups of the breaking rod (560) are arranged on the support table (540) in a horizontal and vertical staggered manner in a quincunx type.

10. The casting sand breaking system according to any one of claims 1-9, wherein The hole size of the sand sieved by the first sanding machine (100) is smaller than the size of the casting sprue after breaking.

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