Sanding device and method suitable for composite insulator hardware machining

Abstract

The invention discloses a sanding device and method suitable for composite insulator hardware machining, and belongs to the technical field of sanding devices. A sand spraying device suitable for composite insulator hardware machining comprises a cylindrical machining cavity formed in a shell, a partition plate is formed on the inner wall of the machining cavity, a sand spraying mechanism used for screening sand is arranged on the bottom wall of the partition plate and comprises a screen, a through hole coaxial with the machining cavity is formed in the bottom wall of the screen, and the through hole is communicated with the machining cavity. A lifting mechanism is arranged at the axis of the processing cavity, and a mounting piece for placing a wax mold is rotatably arranged at the lifting mechanism. Through cooperative arrangement of the lifting mechanism and the sand spraying mechanism, sand spraying operation can be conducted on a plurality of wax molds at the same time, in addition, when sand spraying operation is conducted, fine sand falls to the wax molds from the upper portion more evenly and fully, the device is compact in structure and reasonable in design, uniform sand spraying treatment of the wax molds can be achieved, the sand spraying effect is improved, and the production efficiency is improved. And further, the processing quality and the production efficiency of the composite insulator hardware are improved.

Description

Technical Field

[0001] The invention relates to the technical field of sand spreading devices, and in particular to a sand spreading device and a method suitable for processing composite insulator hardware. Background Art

[0002] There are two main types of sand spreaders used in investment casting shells in China, namely, boiling sand bed and rain sand spreader. Among them, the rain sand spreader is used for the process of sanding wax molds in investment casting. The quality of the sand layer directly affects the output and quality of casting parts.

[0003] The traditional rain-type sand spreader uses a belt hopper to circulate and lift sand. The sand falls from the top to the highest point. After the wax model is coated with slurry, it is inserted into the sand and fine sand is applied to its surface to form a mold shell. The amount of sand and the uniformity of particles are key factors in making the surface layer of the wax model. However, during the sand spraying operation, uneven sand spraying or impurities will cause the wax model to break or leak in the next process, which cannot meet the requirements of process manufacturing. Summary of the invention

[0004] The invention provides a sand spreading device and method suitable for processing composite insulator hardware, which can overcome certain or some defects of the prior art.

[0005] According to the present invention, a sand spreading device and method suitable for composite insulator hardware processing includes a shell having a processing cavity arranged in a cylindrical shape, a partition plate is formed at the inner wall of the processing cavity, a sand sprinkling mechanism for screening sand is provided at the bottom wall of the partition plate, the sand sprinkling mechanism includes a screen, a through hole coaxially arranged with the processing cavity is formed at the bottom wall of the screen, a lifting mechanism is provided at the axis center of the processing cavity, a mounting part for placing a wax mold is rotatably provided at the lifting mechanism, and the lifting mechanism is used to lift the mounting part to the through hole or lower it to the bottom wall of the processing cavity.

[0006] Preferably, the sand shower mechanism includes a plurality of first springs arranged at the bottom wall of the partition plate, a screen for screening sand is arranged between the bottom walls of the plurality of first springs, and a plurality of knocking members for knocking the side walls of the screen at intervals are arranged along the circumference of the through hole on the bottom wall of the screen.

[0007] Through the synergistic effect of the first spring and the screen, the sand shower mechanism can achieve efficient screening and separation of fine sand. The vibration of the screen helps to separate fine sand particles from larger particles, thereby ensuring the uniformity and fineness of the sand shower.

[0008] Preferably, the knocking member includes a hinged seat arranged at the bottom wall of the screen, a knocking arm is rotatably provided at the hinged seat, a knocking head is provided at the end of the knocking arm corresponding to the side wall of the screen, and a contact plate extending into the through hole is provided at the other end of the knocking arm. A second spring is provided between the knocking arm and the side wall of the screen, and the second spring is used for providing an elastic force to keep the knocking arm pressed toward the side wall of the screen.

[0009] Through the rotation of the knocking arm and the knocking action of the knocking head, the knocking piece can effectively knock on the side wall of the screen, which not only helps to prevent the screen from being blocked, but also can further improve the sand screening efficiency and quality through vibration.

[0010] Preferably, the lifting mechanism includes an auxiliary bracket arranged on the top wall of the shell and a lifting rod vertically arranged inside the processing chamber and slidably arranged on the auxiliary bracket. The bottom of the outer wall of the lifting rod is connected to the mounting piece, and a tooth segment is formed on the side wall of the lifting rod. The second driving assembly is used to drive the lifting rod to slide along the auxiliary bracket.

[0011] Through the coordinated action of the auxiliary bracket and the lifting rod, the lifting mechanism can achieve stable lifting and lowering operations on the wax model.

[0012] Preferably, a cleaning piece is rotatably provided on the bottom wall of the base plate; the mounting piece includes an extension tube rotatably provided on the outer wall of the lifting rod, a base is provided on the bottom wall of the extension tube, the base is formed by gradually expanding downward along the axis of the extension tube, a cavity is formed inside the base, a first driving component for driving the base and the cleaning piece to rotate is provided in the cavity, and a plurality of wax model mounting rods for placing wax models are formed on the outer wall of the base.

[0013] Through the above structure, the wax model on the mounting part can be rotated, thereby preferably improving the uniformity of sand pouring on the wax model and further improving the sand pouring effect.

[0014] Preferably, an extension arm for pressing the contact plate to rotate along the hinge seat is formed on the outer wall of the extension tube, a second inclined surface is formed on the bottom wall of the contact plate, and a first inclined surface matching the second inclined surface is formed on the top wall of the extension arm.

[0015] Through the above structure, the contact plate can be better pressed upward when rotating, thereby improving driving stability.

[0016] Preferably, a sieve plate detachably matched with the through hole is slidably provided at the lifting rod; a delivery port is formed on the top wall of the processing chamber, and a cover plate for sealing the processing chamber is detachably provided at the delivery port.

[0017] The above structure facilitates the discharging or feeding of the wax mold on the mounting part, ensures the sealing of the processing chamber during the sand spraying process, and prevents medium leakage and external pollution.

[0018] Preferably, the cleaning component includes a mounting plate rotatably arranged at the bottom wall of the base plate, a plurality of connecting arms are arranged at the outer wall of the mounting plate, a scraping ring cooperating with the side wall of the processing chamber is arranged between the connecting arms, a vertical plate arranged vertically is formed at the top wall of the scraping ring, and a cleaning plate cooperating with the bottom wall of the processing chamber is formed at the bottom wall of the vertical plate.

[0019] The side wall and the bottom wall of the processing cavity can be cleaned while the wax mold on the mounting part is rotated, so as to prevent the sand material from adhering to the side wall or the bottom wall and affecting the sanding effect.

[0020] Preferably, a discharge port is formed at the bottom wall of the processing chamber, a collecting bucket is formed at the discharge port, a circulation mechanism is provided between the collecting bucket and the top wall of the shell, the circulation mechanism is used to pump the fine sand collected at the collecting bucket to the sand sprinkling mechanism, the circulation mechanism has a connecting pipe passing through the collecting bucket and the top wall of the shell, and an exhaust fan is provided at the connecting pipe.

[0021] By setting up the circulation mechanism, the processing chamber is always in a sealed state during the sand sprinkling operation, thus avoiding the diffusion of fine sand during the sand sprinkling operation. At the same time, the fine sand after the sand sprinkling operation is collected and re-pumped into the sand sprinkling mechanism, which greatly improves the utilization rate of the fine sand.

[0022] A method for using a sand spreading device suitable for processing composite insulator hardware comprises the following steps:

[0023] S1, adsorb the sieve plate to the top wall of the processing chamber, and lift the mounting part to the through hole through the lifting mechanism;

[0024] S2, installing the wax model on the wax model installation rod, and lowering the installation part to the bottom wall of the processing cavity through the lifting mechanism;

[0025] S3, introducing fine sand into the sand shower mechanism, and rotating the wax mold on the wax mold mounting rod at the sand shower mechanism 230 through the first driving assembly, and at the same time, the cleaning piece also rotates synchronously;

[0026] S4. After the sand spraying operation is completed, the installation part is lifted to the through hole through the lifting mechanism to be taken out.

[0027] Through the above, the operation is simple, and the sand spraying operation can be performed on multiple wax models at the same time, thereby improving the sand spraying efficiency.

[0028] The beneficial effects of the present invention are as follows:

[0029] 1. Through the coordinated arrangement of the lifting mechanism and the sand spraying mechanism, multiple wax molds can be sand sprayed at the same time. In addition, during the sand spraying operation, fine sand falls from the top to the wax mold more evenly and fully. The present invention has a compact structure and a reasonable design, and can achieve uniform sand spraying of the wax mold, thereby improving the sand spraying effect, thereby improving the processing quality and production efficiency of the composite insulator hardware;

[0030] 2. Through the coordinated arrangement of the cleaning part, the mounting part and the knocking part, the side walls and the bottom wall of the processing chamber can be cleaned while the wax mold on the mounting part is rotated, and the knocking part is driven to knock the screen at intervals, thereby avoiding the sand material adhering to the side wall or the bottom wall to affect the sand pouring effect and the screen being blocked. The cleaning part cooperates with the circulation mechanism so that the sand material after the sand pouring operation can quickly enter the circulation mechanism for circulation, thereby improving the practicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 The present invention is a schematic diagram of the overall structure of a sand spreading device suitable for processing composite insulator hardware.

[0032] Figure 2 The present invention is a schematic diagram of the overall side cross-sectional structure of a sand spreading device suitable for processing composite insulator hardware.

[0033] Figure 3 The present invention is a schematic diagram of the structure of a lifting mechanism and a sand sprinkling mechanism of a sand spreading device suitable for processing composite insulator hardware.

[0034] Figure 4 The present invention is a schematic diagram of the lifting mechanism structure of a sand spreading device suitable for processing composite insulator hardware.

[0035] Figure 5 The present invention is a schematic diagram of the structure of a sand sprinkling mechanism of a sand spreading device suitable for processing composite insulator hardware.

[0036] 100, housing; 110, lifting mechanism; 120, circulation mechanism; 130, cover plate; 140, auxiliary support; 210, processing chamber; 220, partition plate; 230, sand shower mechanism; 240, collecting bucket; 250, bottom plate; 260, first drive assembly; 270, connecting pipe; 310, screen; 320, first spring; 330, knocking piece; 340, screen plate; 350, second drive assembly Part; 410, lifting rod; 420, tooth segment; 430, base; 440, extension tube; 450, extension arm; 451, first inclined plane; 460, wax model mounting rod; 470, connecting arm; 471, scraper ring; 472, vertical plate; 473, cleaning plate; 510, hinged seat; 520, knocking arm; 530, knocking head; 540, contact plate; 541, second inclined plane; 550, second spring. DETAILED DESCRIPTION

[0037] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the embodiments. It should be understood that the embodiments are only for explaining the present invention and are not intended to limit it.

[0038] Example 1

[0039] See also Figure 1-5The present embodiment provides a sand spreading device suitable for composite insulator hardware processing, which includes a shell 100 with a processing cavity 210 arranged in a cylindrical shape, a partition plate 220 is formed at the inner wall of the processing cavity 210, and a sand sprinkling mechanism 230 for screening sand is provided at the bottom wall of the partition plate 220. The sand sprinkling mechanism 230 includes a screen 310, and a through hole coaxially arranged with the processing cavity 210 is formed at the bottom wall of the screen 310. A lifting mechanism 110 is provided at the axis of the processing cavity 210, and a mounting part for placing a wax mold is rotatably provided at the lifting mechanism 110. The lifting mechanism 110 is used to lift the mounting part to the through hole or lower it to the bottom wall of the processing cavity 210.

[0040] The present invention discloses a sand spreading device suitable for processing composite insulator hardware. Through the coordinated arrangement of a lifting mechanism 110 and a sand sprinkling mechanism 230, a plurality of wax molds can be sanded simultaneously. In addition, when performing the sand sprinkling operation, fine sand can be dropped from above to the wax mold more evenly and fully. The present invention has a compact structure and a reasonable design, can realize uniform sand sprinkling of the wax mold, improves the sand sprinkling effect, and further improves the processing quality and production efficiency of the composite insulator hardware.

[0041] In this embodiment, the sand showering mechanism 230 includes a plurality of first springs 320 arranged at the bottom wall of the partition plate 220, a screen 310 for screening sand is arranged between the bottom walls of the plurality of first springs 320, and a plurality of knocking members 330 for knocking the side walls of the screen 310 at intervals are arranged along the circumference of the through hole on the bottom wall of the screen 310.

[0042] Through the synergistic effect of the first spring 320 and the screen 310, the sand shower mechanism 230 can achieve efficient screening and separation of fine sand. The vibration of the screen 310 helps to separate fine sand particles from larger particles, thereby ensuring the uniformity and fineness of the sand shower.

[0043] It is understandable that the intermittent knocking action of the knocking piece 330 can effectively prevent the screen 310 from being blocked due to accumulated sand after long-term use, which not only extends the service life of the screen 310, but also improves the stability and reliability of the sand shower mechanism 230.

[0044] In this embodiment, the knocking member 330 includes a hinged seat 510 arranged at the bottom wall of the screen 310, a knocking arm 520 is rotatably provided at the hinged seat 510, a knocking head 530 is provided at the end of the knocking arm 520 corresponding to the side wall of the screen 310, and a contact plate 540 extending into the through hole is provided at the other end of the knocking arm 520. A second spring 550 is provided between the knocking arm 520 and the side wall of the screen 310, and the second spring 550 is used to provide an elastic force to keep the knocking arm 520 pressed toward the side wall of the screen 310.

[0045] Through the rotation of the knocking arm 520 and the knocking action of the knocking head 530, the knocking member 330 can effectively knock the side wall of the screen 310, which not only helps to prevent the screen 310 from being blocked, but also can further improve the sand screening efficiency and quality through vibration.

[0046] In this embodiment, the lifting mechanism 110 includes an auxiliary bracket 140 arranged on the top wall of the shell 100 and a lifting rod 410 vertically arranged inside the processing chamber 210 and slidably arranged on the auxiliary bracket 140. The bottom of the outer wall of the lifting rod 410 is connected to the mounting part, and a tooth section 420 is formed on the side wall of the lifting rod 410. The second driving assembly 350 is used to drive the lifting rod 410 to slide along the auxiliary bracket 140.

[0047] The second driving assembly 350 includes a motor and a gear disposed at an output end of the motor and meshing with the tooth segment 420 .

[0048] Through the coordinated action of the auxiliary bracket 140 and the lifting rod 410 , the lifting mechanism 110 can achieve a stable lifting and lowering operation of the wax pattern.

[0049] In this embodiment, a cleaning piece is rotatably provided on the bottom wall of the base plate 250; the mounting piece includes an extension tube 440 rotatably provided on the outer wall of the lifting rod 410, a base 430 is provided on the bottom wall of the extension tube 440, the base 430 is formed by gradually expanding downward along the axis of the extension tube 440, a cavity is formed inside the base 430, a first driving assembly 260 for driving the base 430 and the cleaning piece to rotate is provided in the cavity, and a plurality of wax model mounting rods 460 for placing wax models are formed on the outer wall of the base 430.

[0050] Through the above structure, the wax model on the mounting part can be rotated, thereby preferably improving the uniformity of sand pouring on the wax model and further improving the sand pouring effect.

[0051] In this embodiment, an extension arm 450 is formed on the outer wall of the extension tube 440 for squeezing the contact plate 540 to rotate along the hinge seat 510, a second inclined surface 541 is formed on the bottom wall of the contact plate 540, and a first inclined surface 451 matching the second inclined surface 541 is formed on the top wall of the extension arm 450.

[0052] Through the above structure, the contact plate 540 can be better pressed upward when rotating, thereby improving driving stability.

[0053] In this embodiment, a sieve plate 340 detachably matched with the through hole is slidably provided at the lifting rod 410; a delivery port is formed on the top wall of the processing chamber 210, and a cover plate 130 for sealing the processing chamber 210 is detachably provided at the delivery port.

[0054] The above structure facilitates the discharging or feeding of the wax mold on the mounting part, ensures the sealing of the processing chamber 210 during the sand spraying process, and prevents medium leakage and external pollution.

[0055] In this embodiment, the cleaning part includes a mounting plate rotatably arranged at the bottom wall of the base plate 250, a plurality of connecting arms 470 are arranged at the outer wall of the mounting plate, a scraper ring 471 cooperating with the side wall of the processing chamber 210 is arranged between the connecting arms 470, a vertical plate 472 is vertically arranged at the top wall of the scraper ring 471, and a cleaning plate 473 cooperating with the bottom wall of the processing chamber 210 is formed at the bottom wall of the vertical plate 472.

[0056] The side walls and bottom wall of the processing chamber 210 can be cleaned while the wax mold on the mounting part is rotated, so as to prevent the sand material from adhering to the side walls or bottom wall and affecting the sanding effect.

[0057] It can be understood that, with the circulation mechanism 120, the sand after the sand spraying operation can quickly enter the circulation mechanism 120 for circulation, thereby improving the practicality of the device.

[0058] Example 2

[0059] See Figure 2 This embodiment also provides a sand spreading device suitable for composite insulator hardware processing, which differs from Embodiment 1 in that: a discharge port is formed at the bottom wall of the processing chamber 210, a collecting bucket 240 is formed at the discharge port, a circulation mechanism 120 is provided between the collecting bucket 240 and the top wall of the shell 100, and the circulation mechanism 120 is used to pump the fine sand collected at the collecting bucket 240 to the sand sprinkling mechanism 230, and the circulation mechanism 120 has a connecting pipe 270 that passes through the collecting bucket 240 and the top wall of the shell 100, and an exhaust fan is provided at the connecting pipe 270.

[0060] By setting the circulation mechanism 120, the processing chamber 210 is always in a sealed state during the sand spraying operation, thereby avoiding the diffusion of fine sand during the sand spraying operation. At the same time, the fine sand after the sand spraying operation is collected and re-pumped into the sand spraying mechanism 230, which greatly improves the utilization rate of the fine sand.

[0061] Example 3

[0062] See Figure 2 This embodiment provides a method for using a sand spreading device suitable for processing composite insulator hardware, comprising the following steps:

[0063] S1, adsorbing the sieve plate 340 to the top wall of the processing chamber 210, and lifting the mounting part to the through hole through the lifting mechanism 110;

[0064] S2, installing the wax mold on the wax mold installation rod 460, and lowering the installation part to the bottom wall of the processing chamber 210 through the lifting mechanism 110;

[0065] S3, introducing fine sand into the sand shower mechanism 230, and rotating the wax mold on the wax mold mounting rod 460 of the sand shower mechanism 230 through the first driving assembly 260, and at the same time, the cleaning piece also rotates synchronously;

[0066] S4, the sand spraying operation is completed, and the installation component is lifted to the through hole by the lifting mechanism 110 to be taken out.

[0067] Through the above, the operation is simple, and the sand spraying operation can be performed on multiple wax models at the same time, thereby improving the sand spraying efficiency.

[0068] It is easy to understand that those skilled in the art can combine, split, reorganize, etc. the embodiments of the present application to obtain other embodiments based on one or several embodiments provided in the present application, and these embodiments do not exceed the protection scope of the present application.

[0069] The present invention and its implementation methods are described schematically above, and the description is not restrictive. The embodiments shown in the embodiments are only part of the implementation methods of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by the embodiments and designs a structure and an implementation method similar to the technical solution without creativity without departing from the purpose of the invention, they should all fall within the protection scope of the present invention.

Claims

1. A sand spreading device suitable for composite insulator hardware processing, characterized in that: The invention comprises a processing chamber (210) arranged in a columnar shape inside a shell (100), a partition plate (220) being formed on the inner wall of the processing chamber (210), a sand shower mechanism (230) for screening sand being arranged on the bottom wall of the partition plate (220), the sand shower mechanism (230) comprising a screen (310), a through hole coaxially arranged with the processing chamber (210) being formed on the bottom wall of the screen (310), a lifting mechanism (110) being arranged at the axis of the processing chamber (210), a mounting part for placing a wax model being rotatably arranged on the lifting mechanism (110), and the lifting mechanism (110) being used to lift the mounting part to the through hole or to lower it to the bottom wall of the processing chamber (210).

2. A sand spreading device suitable for composite insulator hardware processing according to claim 1, characterized in that: The sand shower mechanism (230) comprises a plurality of first springs (320) arranged at the bottom wall of the partition plate (220), a screen (310) for screening sand is arranged between the bottom walls of the plurality of first springs (320), and a plurality of knocking members (330) for knocking the side wall of the screen (310) at intervals are arranged on the bottom wall of the screen (310) along the circumference of the through hole.

3. The sand spreading device suitable for composite insulator hardware processing according to claim 2, characterized in that: The knocking member (330) comprises a hinge seat (510) arranged at the bottom wall of the screen (310), a knocking arm (520) is rotatably arranged at the hinge seat (510), a knocking head (530) is arranged at one end of the knocking arm (520) corresponding to the side wall of the screen (310), a contact plate (540) extending into the through hole is arranged at the other end of the knocking arm (520), and a second spring (550) is arranged between the knocking arm (520) and the side wall of the screen (310), and the second spring (550) is used to provide an elastic force to keep the knocking arm (520) pressed against the side wall of the screen (310).

4. The sand spreading device suitable for composite insulator hardware processing according to claim 1, characterized in that: The lifting mechanism (110) includes an auxiliary bracket (140) arranged on the top wall of the shell (100) and a lifting rod (410) vertically arranged inside the processing chamber (210) and slidably arranged on the auxiliary bracket (140), the bottom of the outer wall of the lifting rod (410) is connected to the mounting member, and a tooth segment (420) is formed on the side wall of the lifting rod (410), and the second driving component (350) is used to drive the lifting rod (410) to slide along the auxiliary bracket (140).

5. The sand spreading device suitable for composite insulator hardware processing according to claim 4, characterized in that: The mounting member comprises an extension tube (440) rotatably arranged at the outer wall of the lifting rod (410), a base (430) being arranged at the bottom wall of the extension tube (440), the base (430) being formed by gradually expanding downward along the axis of the extension tube (440), a cavity being formed inside the base (430), a first driving assembly (260) being arranged in the cavity for driving the base (430) and the cleaning member to rotate, and a plurality of wax model mounting rods (460) for placing wax models being formed at the outer wall of the base (430).

6. The sand spreading device suitable for composite insulator hardware processing according to claim 5, characterized in that: An extension arm (450) is formed on the outer wall of the extension tube (440) for pressing the contact plate (540) to rotate along the hinge seat (510), a second inclined surface (541) is formed on the bottom wall of the contact plate (540), and a first inclined surface (451) matched with the second inclined surface (541) is formed on the top wall of the extension arm (450).

7. The sand spreading device suitable for composite insulator hardware processing according to claim 4, characterized in that: A sieve plate (340) detachably matched with the through hole is slidably provided at the lifting rod (410); a delivery port is formed on the top wall of the processing chamber (210), and a cover plate (130) for sealing the processing chamber (210) is detachably provided at the delivery port.

8. The sand spreading device suitable for composite insulator hardware processing according to claim 5, characterized in that: The cleaning member comprises a mounting plate rotatably arranged at the bottom wall of the bottom plate (250), the bottom wall of the bottom plate (250) being rotatably provided with the cleaning member, a plurality of connecting arms (470) being arranged at the outer wall of the mounting plate, a scraping ring (471) cooperating with the side wall of the processing chamber (210) being arranged between the connecting arms (470), a vertical plate (472) being vertically arranged being formed at the top wall of the scraping ring (471), and a cleaning plate (473) cooperating with the bottom wall of the processing chamber (210) being formed at the bottom wall of the vertical plate (472).

9. The sand spreading device suitable for composite insulator hardware processing according to claim 1, characterized in that: A discharge port is formed at the bottom wall of the processing chamber (210), a collecting bucket (240) is formed at the discharge port, a circulation mechanism (120) is provided between the collecting bucket (240) and the top wall of the shell (100), the circulation mechanism (120) is used to pump the fine sand collected at the collecting bucket (240) to the sand shower mechanism (230), the circulation mechanism (120) has a connecting pipe (270) passing through the collecting bucket (240) and the top wall of the shell (100), and an exhaust fan is provided at the connecting pipe (270).

10. The method for using the sand spreading device for composite insulator hardware processing according to any one of claims 1 to 9, characterized in that: Follow these steps: S1, adsorbing the sieve plate (340) to the top wall of the processing chamber (210), and lifting the mounting member to the through hole through the lifting mechanism (110); S2, installing the wax model on the wax model installation rod (460), and lowering the installation part to the bottom wall of the processing chamber (210) through the lifting mechanism (110); S3, introducing fine sand into the sand shower mechanism (230), and rotating the wax mold on the wax mold mounting rod (460) at the sand shower mechanism (230) through the first driving assembly (260), and at the same time, the cleaning piece also rotates synchronously; S4, the sand spraying operation is completed, and the installation component is lifted to the through hole by the lifting mechanism (110) for removal.

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