Spiral sand shell servo control rotary demolding casting equipment

Abstract

The invention relates to the technical field of sand shell casting, discloses servo control rotary demolding casting equipment for a spiral sand shell, and solves the problems of equipment complexity, high maintenance cost, limited production efficiency and poor long-term stability caused by high-precision matching requirements in a mold core demolding process in traditional spiral sand shell casting equipment. The fixed extrusion column is matched with the spiral groove, so that the matching cover and the mold core realize spiral displacement according to own spiral structures, the linear displacement length of the spiral groove is passively changed along with the rotating speed of the matching cover, and the matching cover and the mold core form forced matching, so that the mold core can move according to an own spiral path at any rotating speed; according to the simple and effective matched connection mode, the stability and the reliability of demolding control of the mold core are guaranteed, and meanwhile the failure rate is remarkably reduced.

Description

Technical Field

[0001] The invention relates to the technical field of sand shell casting, in particular to a spiral sand shell servo-controlled rotary demoulding casting device. Background Art

[0002] Sand shell is a kind of forming mold in the casting process, usually made of molding sand, used to form the shape of the casting in one piece. Spiral sand shell is a kind of sand shell specially used for casting screw, such as Figure 12 As shown, its internal cavity is designed to match the spiral shape of the screw.

[0003] The casting process for spiral sand shells differs from that for ordinary sand shells. The mold of the casting equipment consists of two upper and lower modules and a core in the middle, where the core is used to form the spiral cavity inside the spiral sand shell. Specifically, the rough blank of the spiral sand shell (the sand shell is shaped but not yet heated and cured) is made from molding sand (commonly resin sand, which is mixed with sand as a binder). Before the sand shell solidifies, the core needs to be removed in time to prevent the sand shell from sticking to the core after solidification. Therefore, the spiral sand shell casting equipment must have a structure for demolding the core.

[0004] like Figure 1 、 Figure 2 As shown, in existing spiral sand shell casting equipment, the core demolding mechanism primarily consists of a servo motor and an electronically controlled slide. The operating principle is that based on the spiral shape of the core, the servo motor is responsible for the core's rotation, while the electronically controlled slide is responsible for its linear movement. These two elements work closely together to rotate and extract the core from the spiral sand shell, following its spiral shape.

[0005] However, this demolding method presents several challenges. Because the servo motor and electronically controlled slide require two separate control programs and precise coordination, even the slightest error can cause deformation or even damage to the sand shell. Furthermore, the need for highly synchronized coordination significantly increases the complexity and maintenance costs of the equipment, hindering the long-term, stable production and manufacturing of spiral sand shells. Summary of the Invention

[0006] The purpose of the present invention is to provide a spiral sand shell servo-controlled rotary demolding casting equipment, which solves the problems in traditional spiral sand shell casting equipment that the core demolding process is complicated, the maintenance cost is high, the production efficiency is limited, and the long-term stability is poor due to the high-precision matching requirements.

[0007] To achieve the above object, the present invention provides the following technical solution: a spiral sand shell servo-controlled rotary demoulding casting device, comprising:

[0008] The mold base and the mold core are movably inserted into the inner side of the mold base to form a shaping cavity for forming a spiral sand shell;

[0009] The slide mechanism and the servo motor installed on the upper side of the slide mechanism, the mold core is installed at the output end of the servo motor, and the servo motor is elastically driven by the slide mechanism to insert the mold core into the mold table;

[0010] The core-retracting mechanism includes a coaxial mating cover installed between the output end of the servo motor and the mold core, and a common rail double-slide module fixedly installed below the mating cover. A spiral groove consistent with the spiral trajectory of the mold core is provided on the surface of the mating cover. A mating component that is movably inserted into the inner side of the spiral groove is installed on the upper side of the mating component. The mating component includes an extrusion column that is movably inserted into the inner side of the spiral groove. When the mold core rotates, the spiral groove and the extrusion column are limited and cooperated, so that the mold core moves according to its own spiral path at any speed.

[0011] As a further description of the above technical solution: the mating component also includes a rotating column arranged inside the extrusion column and rotatably assembled along its length direction. The extrusion column is provided with an opening exposing the rotating column at one end close to the spiral groove. The arc surface of the rotating column is fixedly connected to a shift block movable in the opening, and the shift block protrudes from the arc surface of the extrusion column.

[0012] As a further description of the above technical solution: the end of the rotating column protrudes from one end of the spiral groove, the protruding part of the rotating column is sleeved with a torsion spring, and the end of the extruding column close to the torsion spring is equipped with a telescopic rod for pushing the rotating column to rotate.

[0013] As a further description of the above technical solution: an angle sensor for detecting the rotation angle of the rotating column is provided at one end of the extrusion column.

[0014] As a further description of the above technical solution: the common rail double slide module includes a pedestal fixed under the mating cover, a screw and two sliders that are rotatably assembled on the inner side of the pedestal for mating with the screw, and a motor 2 for driving the screw to rotate is assembled on one side of the pedestal, and a support frame for supporting the mating assembly is provided on the upper side of the slider, and the threads from the middle of the screw to the two ends are arranged in opposite directions. When the screw rotates, the two sliders move toward each other or away from each other.

[0015] As a further description of the above technical solution: two spiral grooves are arranged on the circumference of the surface of the matching cover.

[0016] As a further description of the above technical solution: the slide mechanism includes a slide rail and a slide seat on the slide rail, the servo motor is fixedly assembled on the slide seat, and the slide rail is also equipped with a spring that pushes the slide seat to move toward the mold platform.

[0017] As a further description of the above technical solution: a locking column unit is assembled on the side of the slide, and the locking column unit locks the position of the slide on the slide rail.

[0018] As a further description of the above technical solution: the mold core is assembled on one end of the matching cover through a mounting seat at one end, and the mold core and the mounting seat are detachable.

[0019] As a further description of the above technical solution: the matching cover is cut along the axial direction, and is cut into at least two halves. An assembly column is assembled between the mounting seat and the output end of the servo motor. Most of the matching covers after cutting are disassembled and assembled on the surface of the assembly column and assembled into a cylindrical shape.

[0020] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0021] 1. When the mating cover and the mold core rotate synchronously, the fixed extrusion pins and the spiral grooves cooperate with each other, prompting the mating cover and the mold core to achieve spiral displacement according to their own spiral structure. Since the extrusion pins are fixed in position, the mating cover must perform adaptive linear displacement when the rotation conditions are met. Therefore, the linear displacement length of the spiral groove will passively change with the rotation speed of the mating cover, forming a forced fit between the two, so that the mold core can move according to its own spiral path at any speed. This simple and effective matching connection method not only ensures the stability and reliability of the mold core demolding control, but also significantly reduces the failure rate.

[0022] 2. The shift block and the squeeze column cooperate with each other on the inner side of the spiral groove. While ensuring stable operation, there is no excessive friction between them and the inner wall of the spiral groove, thereby effectively improving the service life of the squeeze column.

[0023] 3. As the extrusion column gradually wears out during long-term use, the shift block adaptively abuts against the upper inner wall of the spiral groove, which can automatically compensate for the thickness of the extrusion column that has become thinner due to friction. In this way, the service life of the extrusion column is further improved without being affected by the wear and thinning of the extrusion column, ensuring that the extrusion column can still be used normally within the allowable wear range. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the front structure of the existing spiral sand shell casting equipment;

[0025] Figure 2 This is a schematic diagram of the top view of the existing spiral sand shell casting equipment;

[0026] Figure 3 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 4 This is a schematic diagram of the mold base and mold core of the present invention;

[0028] Figure 5 This is a schematic diagram of the assembly column and the matching cover of the present invention;

[0029] Figure 6This is a structural diagram of the common rail double slide module of the present invention;

[0030] Figure 7 It is a schematic diagram of the structure of the matching components of the present invention;

[0031] Figure 8 is a schematic cross-sectional view of the mating components of the present invention;

[0032] Figure 9 is a schematic side view of the mating assembly of the present invention;

[0033] Figure 10 This is a schematic diagram of the rotating state of the matching cover of the present invention;

[0034] Figure 11 For the present invention Figure 10 A is an enlarged schematic diagram;

[0035] Figure 12 It is a schematic diagram of the spiral sand shell of the prior art of the present invention.

[0036] Figure: 10, die table; 11, lower die block; 12, upper die block; 13, die slot; 14, injection slot; 15, positioning slot; 16, positioning column; 20, servo motor; 30, slide mechanism; 31, slide rail; 32, slide seat; 33, spring; 34, locking column unit; 301, electric control slide; 40, core retraction mechanism; 41, assembly column; 411, screw hole; 42, matching cover; 421, spiral groove; 422, bolt; 43, common rail double slide Table module; 431, table; 432, slider; 433, screw; 434, motor 2; 435, support frame; 44, matching components; 441, extrusion column; 442, rotating column; 443, shift block; 444, torsion spring; 445, pull arm; 446, telescopic rod; 447, angle sensor; 448, gear; 449, fan-shaped gear disc; 50, mold core; 51, mounting seat; 60, injection mechanism; 61, injection head; 70, spiral sand shell. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] In order to further understand the content of the present invention, the present invention is described in detail with reference to the accompanying drawings.

[0039] like Figure 1 、 Figure 2 、 Figure 4As shown, the process of manufacturing the spiral sand shell 70 by the existing spiral sand shell casting equipment includes: P1 mold closing, P2 sand injection, P3 demoulding, P4 heating and curing, wherein:

[0040] P1 mold closing: The lower module 11 and the upper module 12 are combined to form a mold cavity 13 that forms the outer shape of the spiral sand shell 70. The mold core 50 assembled on the output end of the servo motor 20 is then pushed into the mold cavity 13 by the electric control slide 301, ensuring that the protrusion at the outer end of the mold core 50 is inserted into the positioning groove 15 to achieve the position of the mold core 50 in the mold cavity 13. In this way, the lower module 11, the upper module 12 and the mold core 50 are combined to form a chamber for forming the spiral sand shell 70;

[0041] P2 Sand injection: The injection head 61 of the injection mechanism 60 is connected to the injection slot 14 on one side of the lower module 11. The injection mechanism 60 is similar to an existing spraying machine. The injection mechanism 60 is used to spray resin sand onto the surface of the mold core 50. At the same time, the mold core 50 is rotated by the servo motor 20, and the resin sand is finally filled into the cavity for forming the spiral sand shell 70.

[0042] P3 Demolding: Wait for a while until the spiral sand shell 70 in the above-mentioned chamber is initially shaped and not completely solidified (it can be understood as a semi-dry state. When the spiral sand shell 70 is just formed, pulling out the mold core 50 may easily cause the spiral sand shell 70 to collapse. After the spiral sand shell 70 is completely shaped, the mold core 50 will stick to the spiral sand shell 70 and the mold core 50 can no longer be pulled out. Therefore, the semi-dry state of the spiral sand shell 70 is the best time to demold the mold core 50). Then, the servo motor 20 and the electric control slide 301 are synchronously controlled by the control program to cause the mold core 50 to rotate and move linearly at the same time, so as to demold the mold core 50 in the spiral sand shell 70 along the spiral shape. This process is similar to unscrewing a screw from a screw hole.

[0043] P4 Heating and curing: After the core 50 is completely demolded, the lower module 11 and the upper module 12 are directly heated by the heating element to completely cure the internal spiral sand shell 70. Finally, the spiral sand shell 70 can be demolded on the lower module 11 and the upper module 12 by knocking or vibrating.

[0044] The technical difficulty of the P3 demoulding step is that when the core 50 is demoulded from the spiral sand shell 70, the servo motor 20 is just started, which drives the core 50 to rotate. Its rotation speed gradually accelerates from zero to a uniform speed. Accordingly, in order to match the rotation speed of the servo motor 20, the electric slide 301 drives the core 50 to move linearly at a speed that is compatible with the acceleration process of the servo motor 20. If there is a slight mistake, the core 50 may not be rotated out of the spiral sand shell 70 according to its own spiral direction, thereby destroying the structure of the spiral cavity in the spiral sand shell 70. Furthermore, if there is an error in the coordination between the servo motor 20 and the electric slide 301, but the error is small, it will not be easy to be discovered while destroying the internal cavity structure of the spiral sand shell 70, which will eventually lead to defective screws cast by the spiral sand shell 70.

[0045] Compared with the prior art, the present invention is directed to the coordination of the rotation and linear movement of the mold core 50, which is mainly reflected in the following aspects: the linear displacement of the mold core 50 passively changes with the change of its rotation speed, rather than the two control systems working together to make the rotation of the mold core 50 an actively controlled variable and the linear displacement a passive variable, thereby avoiding the mold core 50 not exiting the spiral sand shell 70 according to its own spiral path due to the coordination control error of the two sets, and further avoiding the internal cavity of the spiral sand shell 70 being damaged due to the control error.

[0046] Combine Figures 1-12 , a spiral sand shell servo-controlled rotary demoulding casting device, comprising:

[0047] The mold table 10 and the mold core 50 are as follows: the lower module 11 of the mold table 10 is fixedly assembled on the operating table, the upper module 12 is pressed on the upper side of the lower module 11, and a mold groove 13 is formed inside. The upper side of the lower module 11 is provided with a positioning column 16 that is precisely docked with the upper module 12. The lower surface of the upper module 12 is provided with a positioning hole that cooperates with the positioning column 16. The mold core 50 is movably inserted into the inner side of the mold groove 13 to form a shaping cavity for forming a spiral sand shell 70. The mold core 50 is responsible for forming the spiral cavity inside the spiral sand shell 70;

[0048] The slide mechanism 30 and the servo motor 20 mounted on the upper side of the slide mechanism 30 are fixedly mounted on the operating table. The mold core 50 is mounted on the output end of the servo motor 20. The slide mechanism 30 elastically drives the servo motor 20 to insert the mold core 50 into the mold table 10. The servo motor 20 is responsible for accurately controlling the rotation speed of the mold core 50. The rotation speed of the mold core 50 when exiting the spiral sand shell 70 should not be too fast. If the rotation speed is too fast, the spiral cavity inside the spiral sand shell 70 may be easily damaged due to friction. The rotation speed of the mold core 50 is generally greater than five seconds per revolution.

[0049] The core-retracting mechanism 40 includes a coaxial mating cover 42 mounted between the output end of the servo motor 20 and the mold core 50, and a common rail double slide module 43 fixedly mounted below the mating cover 42. The common rail double slide module 43 is fixedly mounted on the operating table. The mating cover 42 is cylindrical, and a spiral groove 421 that is consistent with the spiral trajectory of the mold core 50 is opened on the surface. The upper side of the mating component 44 is equipped with a mating component 44 that is movably inserted into the inner side of the spiral groove 421. The mating component 44 includes an extrusion column 441 that is movably inserted into the inner side of the spiral groove 421. When the servo motor 20 controls the mating cover 42 and the mold core 50 to rotate synchronously, because the position of the extrusion column 441 is fixed, The matching cover 42 needs to be spirally displaced along the spiral direction of the spiral groove 421 to satisfy the relative movement of the extrusion column 441 inside the spiral groove 421. Because the spiral shape of the spiral groove 421 and the core 50 are consistent, the core 50 will also be spirally displaced according to its own spiral structure. Precisely because the position of the extrusion column 441 is fixed, the matching cover 42 must adapt to the linear displacement when it needs to meet the rotation conditions. Therefore, the spiral groove 421 and the extrusion column 441 are limited and matched, and the linear displacement length of the spiral groove 421 passively changes with the rotation speed of the matching cover 42. The two are forced to match, so the core 50 will move according to its own spiral path at any rotation speed.

[0050] Combine Figures 3 to 5 、 Figure 6 、 Figure 7 as well as Figures 10 and 11 The specific process is as follows: the mold core 50 rotates in the mold groove 13, prompting the spiral sand shell 70 to be formed in the mold groove 13. During this process, since the extrusion pin 441 has not yet been inserted into the spiral groove 421, the mold core 50 and the matching cover 42 only rotate under the drive of the servo motor 20. In the final stage of molding, it is necessary to accurately control the alignment of the extrusion pin 441 and the spiral groove 421 near the servo motor 20, as shown in FIG. Figure 10 As shown, so that the movable squeeze pin 441 can be smoothly inserted into the spiral groove 421. Figure 11 As shown, when the mating cover 42 rotates in the rotation direction R, the arc surface of the extrusion column 441 must be in close contact with the extrusion portion S of the lower side wall of the spiral groove 421. The key to this design is that if the extrusion column 441 and the spiral groove 421 fail to form a close contact at the extrusion portion S, when the mating cover 42 starts to rotate, its motion state will be: the mating cover 42 will first rotate in the rotation direction R to force the spiral groove 421 and the extrusion column 441 to reach Figure 11 However, due to the initial self-rotation action of the mating cover 42, the mold core 50 will also self-rotate, and this process will destroy the spiral cavity structure of the spiral sand shell 70.

[0051] While maintaining the close fit between the spiral groove 421 and the extrusion column 441, the spiral sand shell 70 is allowed to solidify to a semi-dry state. Subsequently, the servo motor 20 is activated, and the output speed is uniformly increased to a preset speed. During this process, due to the coordinated action of the spiral groove 421 and the extrusion column 441, the mold core 50 will exit the spiral sand shell 70 along its own spiral direction, completing the demolding. Simultaneously, the servo motor 20 is also pushed by the mating cover 42, passively sliding to one side along the upper end of the slide mechanism 30.

[0052] The above process is not only simple and effective for controlling the demoulding of the mold core 50 in the spiral sand shell 70, but also does not require a complex control system. In actual operation, this greatly reduces the failure rate and ensures the stability and reliability of the demoulding control.

[0053] like Figures 8-11 As shown, the mating component 44 also includes a rotating post 442 arranged inside the extrusion post 441 and rotatably assembled along its length direction. The extrusion post 441 is provided with an opening exposing the rotating post 442 at one end close to the spiral groove 421. The arc surface of the rotating post 442 is fixedly connected to a shift block 443 that moves in the opening. The shift block 443 protrudes from the arc surface of the extrusion post 441. The shift block 443 is arranged on the side of the arc surface of the extrusion post 441 away from the extrusion part S.

[0054] The end of the rotating column 442 away from the spiral groove 421 protrudes from the end of the squeezing column 441, and the protruding part of the rotating column 442 is sleeved with a torsion spring 444. The end of the squeezing column 441 close to the torsion spring 444 is equipped with a telescopic rod 446 for pushing the rotating column 442 to rotate. Figure 7 As shown, one end of the telescopic rod 446 is rotatably connected to one side of the extrusion column 441 through the column, and the output end of the telescopic rod 446 is rotatably connected to the pulling arm 445. One end of the pulling arm 445 is fixedly sleeved on the surface of the rotating column 442. By pushing one end of the pulling arm 445 through the output end of the telescopic rod 446, the shift block 443 can be caused to swing into the opening at one end of the extrusion column 441.

[0055] like Figure 8 、 Figure 11 As shown, the elastic force of the torsion spring 444 causes the rotating post 442 to rotate, so that the shifting block 443 automatically fits the upper inner wall of the spiral groove 421 .

[0056] It should be noted that the telescopic rod 446 is preferably a servo telescopic rod, and the active extension and retraction of the output rod of the servo telescopic rod is controlled by the corresponding servo assembly. When the power supply to the servo telescopic rod is cut off, the output shaft of the servo assembly can rotate freely, so that the output rod can be passively extended and retracted by external force.

[0057] Combine Figures 8 to 11Specifically, in order for the extrusion pin 441 to smoothly enter the inner side of the spiral groove 421, the diameter of the extrusion pin 441 must be less than or equal to the width of the spiral groove 421. If the diameter of the extrusion pin 441 is less than the width of the spiral groove 421, the extrusion pin 441 will have room to move along the width direction of the inner side of the spiral groove 421. In this case, when the mating cover 42 performs a spiral movement, the stability of the movement state will deteriorate, and any fluctuations will be difficult to detect. When the diameter of the extrusion pin 441 is equal to the width of the spiral groove 421, the process of inserting the extrusion pin 441 into the inner side of the spiral groove 421 requires higher precision. Even if this condition is met, the arc surface of the extrusion pin 441 may wear out due to the long-term friction between the extrusion pin 441 and the spiral groove 421, thus leading to the above-mentioned situation.

[0058] To address the above issues, this embodiment employs the following methods: The cross-sectional diameter of the extrusion pin 441 is set to be smaller than the width of the spiral groove 421, thereby reducing the difficulty of controlling the insertion of the extrusion pin 441 into the spiral groove 421. Once the extrusion pin 441 is inserted into the spiral groove 421, the control block 443 is swung to fit against the upper inner wall of the spiral groove 421, thereby stabilizing the sliding state of the extrusion pin 441 in the spiral groove 421.

[0059] Combine Figures 8 to 11 The specific process is as follows: when the squeezing column 441 is located outside the spiral groove 421, the telescopic rod 446 controls the rotation of the rotating column 442 to make the shift block 443 parallel to the direction of the corresponding part of the spiral groove 421, thereby ensuring that the squeezing column 441 can smoothly enter the spiral groove 421.

[0060] The extrusion column 441 is inserted into the spiral groove 421 and formed as shown in FIG. Figure 11 After the telescopic rod 446 is in the fitted state shown, the power supply to the telescopic rod 446 is first cut off, allowing the output end of the telescopic rod 446 to passively extend and retract. Subsequently, under the elastic action of the torsion spring 444, the shift block 443 rests on the upper inner wall of the spiral groove 421. Next, the power supply to the telescopic rod 446 is restored, fixing the shift block 443 at its current angle. This arrangement has the following advantages:

[0061] On the one hand, the shift block 443 and the extrusion column 441 fit together inside the spiral groove 421, ensuring their stable sliding. At the same time, there is no excessive friction between the shift block 443 and the extrusion column 441 and the inner wall of the spiral groove 421, thereby increasing the service life of the extrusion column 441. If the telescopic rod 446 directly controls the shift block 443's contact with the upper inner wall of the spiral groove 421, it would be difficult to accurately control the rotation range of the rotating column 442. If the rotation range is too large, the shift block 443 will exert a significant frictional force against the upper inclined surface of the spiral groove 421. At the same time, due to the reaction force, the friction of the extrusion column 441 on the extrusion area S will also increase. This not only hinders the smooth sliding of the extrusion column 441 within the spiral groove 421, but also increases the friction loss of the extrusion column 441. If the rotation range is too small, the shift block 443 will not form a good support and limit position within the spiral groove 421. In this solution, the shifting block 443 is pressed against the inner side of the spiral groove 421 by the torsion spring 444, thereby ensuring contact without generating excessive friction.

[0062] On the other hand, as the extrusion column 441 wears out over time, the shift block 443 adaptably abuts against the upper inner wall of the spiral groove 421, automatically compensating for the thinning of the extrusion column 441 due to friction. This not only prevents the performance degradation of the extrusion column 441 due to wear, but also further extends its service life, ensuring that the extrusion column 441 can continue to function normally within the allowable wear range.

[0063] like Figure 5 、 Figure 6 As shown, an angle sensor 447 is provided at one end of the extrusion column 441 for detecting the rotation angle of the rotating column 442. A gear 448 is fixedly mounted on the detection shaft of the angle sensor 447, and a sector-shaped toothed disc 449 is mounted on the side of the rotating column 442. The sector-shaped toothed disc 449 meshes with the gear 448, allowing the angle sensor 447 to detect the rotation of the rotating column 442.

[0064] During the sliding fit between the extrusion column 441 and the spiral groove 421, the lower inner wall of the spiral groove 421 will also be subject to friction loss. When it is necessary to detect the flatness of the lower inner wall of the spiral groove 421 and whether the spiral curvature meets the spiral curvature of the corresponding mold core 50, the power supply to the telescopic rod 446 can be disconnected when the matching cover 42 is in a state of spiral motion under the action of the screw hole 411. At this time, the shift block 443 is only driven by the elastic force of the torsion spring 444. When encountering a channel that is too wide or too narrow, the shift block 443 will swing accordingly, and the rotating column 442 will also rotate accordingly. By using the angle sensor 447 to detect the rotation of the rotating column 442, it is possible to effectively determine whether the flatness of the lower inner wall of the spiral groove 421 and the spiral curvature meet the requirements.

[0065] like Figure 3 、 Figure 5 、 Figure 6As shown, the common rail double slide module 43 includes a base 431 fixed under the matching cover 42, a screw rod 433 and two sliders 432 that cooperate with the screw rod 433 are rotatably assembled on the inner side of the base 431, and a second motor 434 that drives the screw rod 433 to rotate is assembled on one side of the base 431, and a support frame 435 that supports the matching component 44 is provided on the upper side of the slider 432. The threads from the middle part of the screw rod 433 to the two ends are set in opposite directions. When the screw rod 433 rotates, the two sliders 432 move toward each other or away from each other.

[0066] Two spiral grooves 421 are arranged around the circumference of the surface of the mating cover 42 .

[0067] like Figure 3 、 Figure 5 、 Figure 6 As shown, specifically, the motor 2 434 controls the rotation of the screw rod 433. When the two sliders 432 are merged, the two extrusion pins 441 will be inserted into the corresponding inner sides of the spiral grooves 421. At this time, when the matching cover 42 rotates, it will be limited by the extrusion pins 441 and passively move linearly. When the two sliders 432 are separated, the extrusion pins 441 exit the inner sides of the spiral grooves 421. At this time, the matching cover 42 can only rotate in a circular motion.

[0068] like Figure 3 As shown, the slide mechanism 30 includes a slide rail 31 and a slide 32 on the slide rail 31. The servo motor 20 is fixedly mounted on the slide 32. The slide rail 31 is also equipped with a spring 33 that pushes the slide 32 to move toward the mold table 10. The side of the slide 32 is equipped with a locking column unit 34, which locks the position of the slide 32 on the slide rail 31.

[0069] Specifically, under the cooperation of the mating cover 42 and the extrusion pin 441, the servo motor 20 moves away from the lower die block 11. At this time, the slide 32 slides on the upper side of the slide rail 31, compressing the spring 33. When the mold core 50 is inserted into the mold table 10, the purpose can be achieved through reverse control. In the process of the servo motor 20 controlling the mold core 50 to rotate inside the mold table 10 to form the spiral sand shell 70, the lock column unit 34 fixes the slide 32 on the slide rail 31 to prevent the servo motor 20 from linear displacement. The lock column unit 34 is preferably an existing electromagnetic lock.

[0070] like Figure 3-Figure 5 As shown, the core 50 is assembled on one end of the matching cover 42 through the mounting seat 51 at one end, and the core 50 is detachable from the mounting seat 51. When it is necessary to produce other types of spiral sand shells 70, it is only necessary to replace the corresponding core 50 on one side of the mounting seat 51.

[0071] The mating cover 42 is split along its axis into at least two halves. An assembly post 41 is mounted between the mounting base 51 and the output end of the servo motor 20. Most of the split mating cover 42 is removably attached to the surface of the assembly post 41, forming a cylindrical shape. This design facilitates the replacement of the mating cover 42 with a corresponding model when replacing a different model of mold core 50. The mating cover 42 is preferably removably attached to the curved surface of the assembly post 41 via bolts 422. The assembly post 41 has screw holes 411 formed on its surface for the bolts 422.

[0072] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A spiral sand shell servo-controlled rotary demoulding casting equipment, characterized in that: include: A mold platform (10) and a mold core (50), wherein the mold core (50) is movably inserted into the inner side of the mold platform (10) to form a molding cavity for molding a spiral sand shell (70); A slide mechanism (30), and a servo motor (20) mounted on the upper side of the slide mechanism (30), a mold core (50) mounted on the output end of the servo motor (20), and the slide mechanism (30) elastically drives the servo motor (20) to insert the mold core (50) into the mold platform (10); The core-retracting mechanism (40) includes a coaxial mating cover (42) mounted between the output end of the servo motor (20) and the mold core (50), and a common rail double slide module (43) fixedly mounted below the mating cover (42). The mating cover (42) has a spiral groove (421) on its surface that is consistent with the spiral trajectory of the mold core (50). The mating component (44) is equipped with a mating component (44) on its upper side that is movably inserted into the inner side of the spiral groove (421). The mating component (44) includes an extrusion column (441) that is movably inserted into the inner side of the spiral groove (421). When the mold core (50) rotates, the spiral groove (421) and the extrusion column (441) are limited and matched, so that the mold core (50) moves along its own spiral path at any speed.

2. The spiral sand shell servo-controlled rotary demoulding casting equipment according to claim 1, characterized in that: The mating assembly (44) further comprises a rotating post (442) arranged inside the extrusion post (441) and rotatably assembled along the length direction thereof; an opening for exposing the rotating post (442) is provided at one end of the extrusion post (441) close to the spiral groove (421); a shifting block (443) movable within the opening is fixedly connected to the arc surface of the rotating post (442); the shifting block (443) protrudes from the arc surface of the extrusion post (441).

3. The spiral sand shell servo-controlled rotary demoulding casting equipment according to claim 2, characterized in that: The end of the rotating column (442) away from the spiral groove (421) protrudes from the end of the extrusion column (441), the protruding portion of the rotating column (442) is sleeved with a torsion spring (444), and the end of the extrusion column (441) close to the torsion spring (444) is equipped with a telescopic rod (446) for driving the rotating column (442) to rotate.

4. The spiral sand shell servo-controlled rotary demoulding casting equipment according to claim 3, characterized in that: An angle sensor (447) for detecting the rotation angle of the rotating column (442) is provided at one end of the squeezing column (441).

5. The spiral sand shell servo-controlled rotary demoulding casting equipment according to claim 1, characterized in that: The common rail double slide module (43) includes a pedestal (431) fixed below the matching cover (42), a screw rod (433) and two sliders (432) matching with the screw rod (433) are rotatably mounted on the inner side of the pedestal (431), and a second motor (434) for driving the screw rod (433) to rotate is mounted on one side of the pedestal (431), a support frame (435) for supporting the matching assembly (44) is provided on the upper side of the slider (432), and the threads of the middle part of the screw rod (433) are arranged in opposite directions to the two ends. When the screw rod (433) rotates, the two sliders (432) move toward each other or away from each other.

6. The spiral sand shell servo-controlled rotary demoulding casting equipment according to claim 5, characterized in that: Two spiral grooves (421) are arranged on the circumference of the surface of the matching cover (42).

7. The spiral sand shell servo-controlled rotary demoulding casting equipment according to claim 1, characterized in that: The slide mechanism (30) includes a slide rail (31) and a slide seat (32) on the slide rail (31). The servo motor (20) is fixedly mounted on the slide seat (32). A spring (33) is also mounted in the slide rail (31) to push the slide seat (32) toward the mold platform (10).

8. The spiral sand shell servo-controlled rotary demoulding casting equipment according to claim 7, characterized in that: The side of the slide (32) is equipped with a locking column unit (34), and the locking column unit (34) locks the position of the slide (32) on the slide rail (31).

9. The spiral sand shell servo-controlled rotary demoulding casting equipment according to claim 1, characterized in that: The mold core (50) is assembled on one end of the matching cover (42) via a mounting seat (51) at one end, and the mold core (50) and the mounting seat (51) are detachable.

10. The spiral sand shell servo-controlled rotary demoulding casting equipment according to claim 9, characterized in that: The matching cover (42) is cut along the axis direction and is divided into at least two halves. An assembly column (41) is assembled between the mounting seat (51) and the output end of the servo motor (20). Most of the matching covers (42) after cutting are disassembled and assembled on the surface of the assembly column (41) to form a cylindrical shape.

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