阅读说明：本技术 一种精密铸造三通阀成型后处理加工机械 (Precision casting three-way valve shaping aftertreatment processing machinery ) 是由 梁红侠 张云贵 于 2019-10-30 设计创作，主要内容包括：本发明涉及一种精密铸造三通阀成型后处理加工机械,包括工作框、电动滑块、夹持装置、连接杆、推动气缸、充气装置和除芯装置,所述的工作框的左端安装有电动滑块,电动滑块上设有夹持装置,工作框的右端安装有连接杆,连接杆的顶出端通过推动气缸与除芯装置连接,除芯装置与连接杆之间设有充气装置,且充气装置安装在工作框的底端。本发明可以解决由于三通阀内部空间较小,且视线较为模糊,人工清砂难以将其内部完全清理,过渡使用刀具清砂可能对三通阀内壁造成磨损,人员通常使用刀具对内芯砂进行随意搅碎,刀具与内芯砂直接碰撞时容易导致刀具变形,且二者摩擦产生的高温容易导致刀具表面过热等问题。(The invention relates to a processing machine for post-forming of a precision casting three-way valve, which comprises a working frame, an electric slider, a clamping device, a connecting rod, a pushing cylinder, an inflating device and a core removing device, wherein the electric slider is arranged at the left end of the working frame, the clamping device is arranged on the electric slider, the connecting rod is arranged at the right end of the working frame, the ejection end of the connecting rod is connected with the core removing device through the pushing cylinder, the inflating device is arranged between the core removing device and the connecting rod, and the inflating device is arranged at the bottom end of the working frame. The invention can solve the problems that the internal space of the three-way valve is small, the sight is fuzzy, the manual sand removal is difficult to completely clean the internal space of the three-way valve, the excessive use of the cutter for sand removal can cause abrasion to the inner wall of the three-way valve, personnel usually use the cutter to randomly stir and crush the inner core sand, the cutter is easy to deform when the cutter directly collides with the inner core sand, the high temperature generated by the friction of the cutter and the inner core sand is easy to cause overheating of the surface of the cutter, and the.)

1. The utility model provides a precision casting three-way valve shaping aftertreatment processing machinery, includes work frame (1), electronic slider (2), clamping device (3), connecting rod (4), promotes cylinder (5), aerating device (6) and removes core device (7), its characterized in that: an electric sliding block (2) is installed at the left end of the working frame (1), a clamping device (3) is arranged on the electric sliding block (2), a connecting rod (4) is installed at the right end of the working frame (1), the ejection end of the connecting rod (4) is connected with a core removing device (7) through a pushing cylinder (5), an air charging device (6) is arranged between the core removing device (7) and the connecting rod (4), and the air charging device (6) is installed at the bottom end of the working frame (1);

the clamping device (3) comprises an L-shaped frame (31), a rotating motor (32), an arc-shaped frame (33) and two limiting arc rods (34), wherein the rotating motor (32) is installed at the rear end of the L-shaped frame (31), the arc-shaped frame (33) is installed on an output shaft of the rotating motor (32), and the two limiting arc rods (34) are installed on the left side and the right side of the rear end of the arc-shaped frame (33) through hinges;

the inflation device (6) comprises a fixing rod (61), a cold air pump (62), an annular cavity (63) and an insertion opening (64), the lower end of the fixing rod (61) is installed at the bottom end of the working frame (1), the inner wall of the upper end of the fixing rod (61) is provided with the annular cavity (63), the right end of the annular cavity (63) is communicated with the cold air pump (62), the cold air pump (62) is installed on the side wall of the fixing rod (61), the left end of the fixing rod (61) is uniformly provided with a threaded opening, the right end of the threaded opening is communicated with the annular cavity (63), and the left end of the threaded opening is in threaded fit connection with the insertion opening;

the core removing device (7) comprises a fixed cylinder (71), a rotating motor (72), a rotating cylinder (73), a telescopic slider (74), an extrusion column (75), a connecting steel rope (76), an extrusion unit (77) and an externally tangent unit (78), the right end of the fixed cylinder (71) is connected with the ejection end of the push cylinder (5), the left end of the fixed cylinder (71) is connected with the rotating cylinder (73) in a sliding fit manner, the rotating motor (72) is installed in the fixed cylinder (71), the output shaft of the rotating motor (72) is connected with the middle part of the right end of the rotating cylinder (73), the telescopic sliders (74) are symmetrically installed on the outer side of the right end of the rotating cylinder (73), the telescopic sliders (74) are connected with the fixed rod (61) in a sliding fit manner, the extrusion column (75) is arranged in the rotating cylinder (73), the extrusion units (77) are uniformly installed on the extrusion column (75) from left to right, the right end of the extrusion column (75) is connected with the right end of the telescopic slider (74) through a connecting steel rope (76), and the outer wall of the rotary cylinder (73) is uniformly provided with circumscribed units (78) along the circumferential direction;

circumscribed unit (78) include arc piece (781), extrusion frame (782), chute (783), cutter (784), air conditioning chamber (785) and seal (786), extrusion frame (782) are connected with rotatory section of thick bamboo (73) through sliding fit's mode, arc piece (781) are installed to the outer end of extrusion frame (782), arc piece (781) are turned right from a left side and have evenly seted up chute (783), be equipped with cutter (784) in chute (783), install on rotatory section of thick bamboo (73) outer wall cutter (784), air conditioning chamber (785) have been seted up to arc piece (781) inside, the right-hand member of air conditioning chamber (785) is equipped with seal (786).

2. The precision casting three-way valve molding post-processing machine according to claim 1, characterized in that: the left end of the rotary cylinder (73) is a threaded drill bit, a placing groove is uniformly formed in the rotary cylinder (73), and a return spring is connected between the left end of the extrusion column (75) and the inside of the left end of the rotary cylinder (73).

3. The precision casting three-way valve molding post-processing machine according to claim 1, characterized in that: the middle part of the connecting steel rope (76) is positioned in the limiting cylinder, and the limiting cylinder is arranged in the rotating cylinder (73).

4. The precision casting three-way valve molding post-processing machine according to claim 1, characterized in that: the diameter of the extrusion unit (77) is gradually reduced from left to right, inner groove groups are uniformly arranged on the outer wall of the extrusion unit (77) along the circumferential direction of the extrusion unit, each inner groove group is composed of a plurality of inner grooves, and balls are placed in each inner groove.

5. The precision casting three-way valve molding post-processing machine according to claim 1, characterized in that: the front end and the rear end of the arc-shaped block (781) are provided with two knife edges with concave V-shaped structures, and the left end of the arc-shaped block (781) is gradually inclined outwards from left to right.

6. The precision casting three-way valve molding post-processing machine according to claim 1, characterized in that: the lower extreme of extrusion frame (782) be equipped with the extrusion piece, the structure that the interior terminal surface of extrusion piece inwards inclines gradually from a left side to the right side, and the ball hugs closely on the interior terminal surface of extrusion piece, the upper end of extrusion piece is connected with the standing groove through built-in spring, cold air cavity (785) are the cat ladder structure.

7. The precision casting three-way valve molding post-processing machine according to claim 1, characterized in that: the sealing port (786) comprises a sealing bag (7861), an elastic rope ring (7862) and a compression spring (7863), the right end of the sealing bag (7861) is installed at the right end of the cold air cavity (785), the left end of the sealing bag (7861) is of an open structure, the outer wall of the left end of the sealing bag (7861) is surrounded by a connecting sleeve, the elastic rope ring (7862) is arranged in the connecting sleeve, and the compression spring (7863) is connected between the connecting sleeve and the cold air cavity (785).

Technical Field

The invention relates to the field of three-way valve machining, in particular to a machining machine for post-forming treatment of a precision casting three-way valve.

Background

Precision casting, referring to the general name of the process for obtaining accurate size castings, products processed by precision casting are precise, complex, close to the final shape of parts, and can be directly used without processing or with little processing, precision casting includes sand cavity casting, ceramic mold casting, metal mold casting, pressure casting and lost foam casting, commonly used three-way valves generally use sand cavity casting, the three-way valves need to be unshelled and cleaned after being manufactured, the commonly used sand cleaning work generally carries out manual sand cleaning on the inner walls of the three-way valves, and the sand cleaning mode often has the following defects:

1. because the internal space of the three-way valve is small and the sight is fuzzy, the inside of the three-way valve is difficult to be completely cleaned by manual sand removal, and the inner wall of the three-way valve can be abraded by excessive use of a cutter for sand removal;

2. personnel usually stir the bits of broken glass at will to the inner core sand with the cutter, lead to the cutter to warp easily when cutter and inner core sand direct collision, and the high temperature that the two rubs and produce leads to the cutter surface overheated easily to shorten its life.

Disclosure of Invention

Technical scheme (I)

In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a precision casting three-way valve shaping aftertreatment processing machinery, includes work frame, electronic slider, clamping device, connecting rod, promotion cylinder, aerating device and removes the core device, the left end of work frame install electronic slider, be equipped with clamping device on the electronic slider, the connecting rod is installed to the right-hand member of work frame, the ejecting end of connecting rod is connected with removing the core device through promoting the cylinder, is equipped with aerating device between removing core device and the connecting rod, and aerating device installs the bottom at the work frame.

Clamping device include L type frame, rotate the motor, arc frame and two spacing arc poles, the rotation motor is installed to the rear end of L type frame, install the arc frame on the output shaft of rotation motor, there are two spacing arc poles in the left and right sides of arc frame rear end through the hinge mounting, concrete during operation, put into the arc frame with the three-way valve, press two spacing arc poles, through locking between bolt pair arc frame and the spacing arc pole, through removing the core device to the inside horizontal position of three-way valve remove the core after, drive the ninety degrees of clockwise rotation of three-way valve through rotating the motor, make and remove the core device and stir the bits of broken glass to the inside former longitudinal position of three-way valve.

Aerating device include the dead lever, the air cooling pump, annular chamber and inserted hole, the bottom at the work frame is installed to the lower extreme of dead lever, the annular chamber has been seted up to the upper end inner wall of dead lever, the right-hand member and the air cooling pump of annular chamber communicate with each other, the air cooling pump is installed on the dead lever lateral wall, the screw thread mouth is evenly installed to the left end of dead lever, and the right-hand member and the annular chamber intercommunication of screw thread mouth, screw-thread fit connection between the left end of screw thread mouth and the inserted hole, concrete during operation, before the decoring, it makes the inserted hole insert the air cooling intracavity to drive the coring device through promoting the cylinder, carry air cooling intracavity with air cooling through the air cooling pump, thereby arc piece surface temperature has been reduced, the.

The core removing device comprises a fixed cylinder, a rotating motor, a rotating cylinder, a telescopic slide block, an extrusion column, a connecting steel rope, an extrusion unit and an externally tangent unit, wherein the right end of the fixed cylinder is connected with the ejection end of a pushing cylinder, the left end of the fixed cylinder is connected with the rotating cylinder in a sliding fit manner, the rotating motor is installed in the fixed cylinder, an output shaft of the rotating motor is connected with the middle part of the right end of the rotating cylinder, the telescopic slide block is symmetrically installed on the outer side of the right end of the rotating cylinder and is connected with a fixed rod in a sliding fit manner, the extrusion column is arranged in the rotating cylinder, the extrusion unit is uniformly installed on the extrusion column from left to right, the right end of the extrusion column is connected with the right end of the telescopic slide block through the connecting steel rope, the externally tangent unit is uniformly installed on the outer wall of the rotating cylinder along the circumferential direction, the three-way valve after the clamping is driven by the electric sliding block to move rightwards at a low speed, at the moment, the externally tangent unit rotating at a high speed performs primary crushing on the inside of the three-way valve, after the externally tangent unit is firstly penetrated through the crushing, the externally tangent unit is enabled to expand through the stress movement of the extrusion column, so that the inner wall of the three-way valve is attached and crushed, the core removing device performs gradual expanding crushing on the inside of the three-way valve, the inner core sand removing rate is improved, and the condition that the cutter edge and the inside of the three-way valve.

Circumscribed unit include the arc piece, the extrusion frame, the chute, the cutter, air conditioning chamber and seal, the extrusion frame is connected with the rotary drum through sliding fit's mode, the arc piece is installed to the outer end of extrusion frame, the chute has evenly been seted up to the arc piece from a left side to the right side, be equipped with the cutter in the chute, the cutter is installed on the rotary drum outer wall, the inside cold air chamber that has seted up of arc piece, the right-hand member in cold air chamber is equipped with the seal, concrete during operation, when circumscribed unit atress is high-speed rotatory, the cutter at first contacts with inner core sand and stirs the bits of broken glass, when the arc piece receives the extrusion and expands outward, make the outer wall of arc piece hug closely at the three-way valve inner wall, at this.

Preferably, the left end of the rotary cylinder is a threaded drill bit, a placing groove is uniformly formed in the rotary cylinder, and a return spring is connected between the left end of the extrusion column and the inside of the left end of the rotary cylinder.

Preferably, the middle part of the connecting steel rope is positioned in the limiting cylinder, and the limiting cylinder is arranged in the rotating cylinder.

Preferably, the diameter of the extrusion unit is gradually reduced from left to right, inner groove groups are uniformly formed in the outer wall of the extrusion unit along the circumferential direction of the extrusion unit, each inner groove group is composed of a plurality of inner grooves, and balls are placed in each inner groove.

Preferably, the front end and the rear end of the arc-shaped block are provided with two knife edges with concave V-shaped structures, and the left end of the arc-shaped block is gradually inclined outwards from left to right.

Preferably, the lower extreme of extrusion frame be equipped with the extrusion piece, the structure that the interior terminal surface of extrusion piece inwards inclines gradually from a left side to the right side, and the ball hugs closely on the interior terminal surface of extrusion piece, the upper end of extrusion piece is connected with the standing groove through built-in spring, the cold air chamber is the cat ladder structure.

Preferably, the sealing opening include the sealed bag, elasticity rope circle and compression spring, the right-hand member at the cold air chamber is installed to the right-hand member of sealed bag, the left end of sealed bag is open structure, the left end outer wall of sealed bag has the adapter sleeve in the surrounding, and is equipped with the elasticity rope circle in the adapter sleeve, is connected with compression spring between adapter sleeve and the cold air chamber, and the sealed bag is for strengthening the material constitution of nylon.

(II) advantageous effects

1. According to the processing machine for the molding and post-processing of the precision casting three-way valve, the inner core sand is fully crushed by adopting a gradually expanding and crushing mode, the mechanical in-and-out crushing avoids the situations of a visual field blind area and partial non-crushing, and the middle part of the inner core sand is drilled and crushed by adopting a point-crushing mode during initial crushing, so that the situation that a cutter is deformed after being directly and fully collided is avoided;

2. according to the processing machine for the post-forming treatment of the precision casting three-way valve, the arc-shaped block is precooled by the inflating device in a cold air inflating mode, so that the temperature of heat generated by friction during crushing is further reduced;

3. according to the processing machine for the formed post-processing of the precision casting three-way valve, the core removing device provided by the invention is used for crushing and removing the core sand in a mode of firstly drilling at a single point and then gradually expanding and crushing, and the expanded arc-shaped block is tightly attached to the inner wall of the three-way valve to rotate at a high speed, so that the residual amount of the core sand in the three-way valve is further reduced.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is an overall cross-sectional view of the present invention;

FIG. 2 is a schematic perspective view of the clamping device of the present invention;

FIG. 3 is a cross-sectional view of the inflator device of the present invention;

FIG. 4 is a schematic perspective view of the decoring apparatus of the present invention;

FIG. 5 is a cross-sectional view of a decoring apparatus of the present invention;

FIG. 6 is a cross-sectional view (from left to right) of the rotary cylinder, the arcuate block and the cutter of the present invention;

FIG. 7 is a cross-sectional view (from top to bottom) of the present invention between the arc block, chute and cold air chamber;

FIG. 8 is an enlarged view of the invention in section X of FIG. 5;

fig. 9 is a diagram showing a state of clamping the three-way valve according to the present invention.

Detailed Description

Embodiments of the present invention will be described below with reference to the drawings. In this process, the width of the lines or the size of the components in the drawings may be exaggerated for clarity and convenience of description.

The following terms are defined based on the functions of the present invention, and may be different depending on the intention of the user or the operator or the convention. Therefore, these terms are defined based on the entire contents of the present specification.

As shown in fig. 1 to 9, a precision casting three-way valve molding post-processing machine comprises a working frame 1, an electric slider 2, a clamping device 3, a connecting rod 4, a pushing cylinder 5, an inflating device 6 and a core removing device 7, wherein the electric slider 2 is installed at the left end of the working frame 1, the clamping device 3 is arranged on the electric slider 2, the connecting rod 4 is installed at the right end of the working frame 1, the ejecting end of the connecting rod 4 is connected with the core removing device 7 through the pushing cylinder 5, the inflating device 6 is arranged between the core removing device 7 and the connecting rod 4, and the inflating device 6 is installed at the bottom end of the working frame 1.

Clamping device 3 include L type frame 31, rotate motor 32, arc frame 33 and two spacing arc pole 34, rotation motor 32 is installed to the rear end of L type frame 31, install arc frame 33 on the output shaft of rotation motor 32, there are two spacing arc pole 34 in the left and right sides of arc frame 33 rear end through the hinge mounting, during specific work, put into arc frame 33 with the three-way valve, press two spacing arc pole 34, lock between arc frame 33 and the spacing arc pole 34 through the bolt, after removing the core through removing core device 7 and carrying out the coring to the inside horizontal position of three-way valve, drive the ninety degrees of clockwise rotation of three-way valve through rotating motor 32, make it stir the bits of broken glass and remove the core to the inside former vertical position of three-way valve to remove core device 7.

Aerating device 6 include dead lever 61, cold air pump 62, annular chamber 63 and inserted hole 64, the bottom at work frame 1 is installed to the lower extreme of dead lever 61, annular chamber 63 has been seted up to the upper end inner wall of dead lever 61, the right-hand member of annular chamber 63 communicates with each other with cold air pump 62, cold air pump 62 is installed on the dead lever 61 lateral wall, the screw thread mouth is evenly installed to the left end of dead lever 61, and the right-hand member and the annular chamber 63 intercommunication of screw thread mouth, screw-thread fit is connected between the left end of screw thread mouth and the inserted hole 64, during specific work, before the decoring, it makes in the inserted hole 64 inserts cold air chamber 785 to move right through promoting cylinder 5 drive decoring device 7, carry cold air in the cold air chamber 785 through cold air pump 62, thereby arc piece 781 surface temperature has been reduced, the arc piece 781 after receiving the.

The core removing device 7 comprises a fixed cylinder 71, a rotating motor 72, a rotating cylinder 73, a telescopic slider 74, an extrusion column 75, a connecting steel rope 76, an extrusion unit 77 and an externally tangent unit 78, the right end of the fixed cylinder 71 is connected with the ejection end of the pushing cylinder 5, the left end of the fixed cylinder 71 is connected with the rotating cylinder 73 in a sliding fit mode, the rotating motor 72 is installed in the fixed cylinder 71, the output shaft of the rotating motor 72 is connected with the middle part of the right end of the rotating cylinder 73, the telescopic sliders 74 are symmetrically installed on the outer side of the right end of the rotating cylinder 73, the telescopic sliders 74 are connected with the fixed rod 61 in a sliding fit mode, the extrusion column 75 is arranged in the rotating cylinder 73, the extrusion units 77 are evenly installed on the extrusion column 75 from left to right, the right end of the extrusion column 75 is connected with the right end of the telescopic slider 74 through the connecting steel rope 76, the externally tangent unit 78, during specific work, the rotary motor 72 drives the rotary barrel 73 to rotate so as to drive the externally tangent unit 78 to rotate, the clamped three-way valve is driven to move rightwards at a low speed through the electric slider 2, at the moment, the externally tangent unit 78 rotating at a high speed firstly crutches the inside of the three-way valve, after the crushing is firstly run through, the externally tangent unit 78 is outwards expanded through the forced movement of the extrusion column 75, so that the inner wall of the three-way valve is attached and crushed, the core removing device 7 gradually expands the inside of the three-way valve to crunch and crush the inside of the three-way valve, the inner core sand removal rate is improved, and the situations that a knife edge.

Circumscribed unit 78 include arc piece 781, extrusion frame 782, chute 783, cutter 784, air conditioning chamber 785 and seal 786, extrusion frame 782 is connected with rotatory section of thick bamboo 73 through sliding fit's mode, arc piece 781 is installed to the outer end of extrusion frame 782, arc piece 781 has evenly seted up chute 783 from a left side to the right side, be equipped with cutter 784 in the chute 783, cutter 784 installs on rotatory section of thick bamboo 73 outer wall, arc piece 781 is inside to be seted up air conditioning chamber 785, the right-hand member of air conditioning chamber 785 is equipped with seal 786, during specific work, circumscribed unit 78 atress is high-speed rotatory, cutter 784 at first contacts with the inner core sand and stirs the bits, when arc piece 781 receives the extrusion and expands outward, make the outer wall of arc piece 781 hug at the three-way valve inner wall, at this moment, cutter 784 retracts into chute 783, arc piece 781 stirs the inner core sand for.

The left end of the rotary barrel 73 is a threaded drill bit, the left end of the rotary barrel 73 is of a circular truncated cone structure, difficulty in initially drilling into inner core sand is reduced according to the principle of a point broken surface, a placing groove is uniformly formed in the rotary barrel 73, a reset spring is connected between the left end of the extrusion column 75 and the inside of the left end of the rotary barrel 73, and the reset spring plays roles of resetting and connecting.

The middle part of the connecting steel rope 76 is positioned in the limiting cylinder, the limiting cylinder is arranged in the rotating cylinder 73, the limiting cylinder plays a role in limiting the direction of the connecting steel rope 76, and the condition that the connecting steel rope 76 collides with the extrusion frame 782 during working is avoided.

The diameter of extrusion unit 77 from a left side to right dwindle gradually, reduced with the extrusion degree of difficulty between the extrusion piece, and the extrusion unit 77 that moves to the right makes extrusion frame 782 expand outward gradually, and evenly seted up inner groove group along its circumference on the outer wall of extrusion unit 77, every inner groove group comprises a plurality of inner groovy, has placed the ball in every inner groove, has reduced with the friction between the terminal surface in the extrusion piece.

Arc piece 781 around both ends set up the edge of a knife of two indent formula V type structures, when arc piece 781 hugs closely at the three-way valve inner wall, this edge of a knife can be strickleed off the three-way valve inner wall when high-speed rotating to reduced the residual rate of inner core sand material on the three-way valve inner wall, the left end of arc piece 781 has reduced the propulsive resistance between decoring device 7 and the inner core sand from the structure that turns right gradually and lean out from a left side.

Extrusion frame 782's lower extreme be equipped with the extrusion piece, turn right gradually leanin structure from a left side in the extrusion piece, and the ball hugs closely on the interior terminal surface of extrusion piece, the upper end of extrusion piece is passed through built-in spring and is connected with the standing groove, built-in spring plays the effect that resets, air conditioning chamber 785 is the cat ladder structure for separate the state between air conditioning chamber 785 and the chute 783, can guarantee promptly that cutter 784 is flexible also can guarantee the cold-receiving homogeneity of air conditioning to the inside of arc-shaped piece 781.

The sealing port 786 comprises a sealing bag 7861, a tightening rope ring 7862 and a compression spring 7863, the right end of the sealing bag 7861 is installed at the right end of the cold air cavity 785, the left end of the sealing bag 7861 is of an open structure, a connecting sleeve is arranged on the outer wall of the left end of the sealing bag 7861 in a surrounding mode, the tightening rope ring 7862 is arranged in the connecting sleeve, the compression spring 7863 is connected between the connecting sleeve and the cold air cavity 785, the sealing bag 7861 is made of reinforced nylon materials and is airtight, when cold air is conveyed, the insertion port 64 is inserted into the sealing bag 7861 by driving the de-coring device 7 to move rightwards through the pushing cylinder 5, the cold air is conveyed into the cold air cavity 785, after conveying is finished, the de-coring device 7 is reset under force, the insertion port 64 is far away from the sealing bag 7861, and the sealing bag 7861 is sealed in a contracting mode under the action.

When in work:

s1, pre-cooling the surface of an arc block 781: the insertion opening 64 is inserted into the cold air cavity 785 by driving the decoring device 7 to move rightwards through the pushing cylinder 5, cold air is conveyed into the cold air cavity 785 through the cold air pump 62, the surface temperature of the arc-shaped block 781 is reduced, and the position of the decoring device 7 is reset;

s2, clamping of the three-way valve: the three-way valve is locked and clamped through the clamping device 3;

s3, primary crushing: the rotary motor 72 drives the rotary cylinder 73 to rotate so as to drive the rotary cylinder 73 to rotate at a high speed, the clamped three-way valve is driven to move rightwards at a low speed through the electric slide block 2, and at the moment, the cutter 784 rotating at a high speed synchronously performs primary penetration crushing on the inner core sand;

s4, expanding and crushing: after the penetration crushing, the core removing device 7 is driven to move left at a low speed by the pushing cylinder 5, at the moment, the extrusion column 75 moves right after being pulled by the connecting steel rope 76 so as to extrude the arc-shaped block 781 to expand outwards, the arc-shaped block 781 rotating at a high speed gradually expands outwards while moving left at a low speed until the arc-shaped block 781 is attached to the inner wall of the three-way valve, at the moment, the expanded arc-shaped block 781 crushes the inner core sand on the inner wall of the three-way valve again, and after the crushing is finished, the clamped three-way valve is driven to move left to reset;

s5, adjusting the angle of the three-way valve: the three-way valve is driven to rotate ninety degrees clockwise by rotating the motor 32, the steps from S3 to S4 are repeated to crush the inner core sand at the original longitudinal position of the three-way valve, and the three-way valve is taken out after the crushing.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.