An adjustable sand core pressing device for intelligent casting island

Abstract

The present invention relates to the technical field of intelligent casting islands, and discloses an adjustable sand core pressing device for use in intelligent casting islands. In the process of the mixing and distributing hopper of the present invention moving from the inside of a feed frame to the inside of a pressing frame, the mixed sand core raw materials are distributed to the inside of a transfer lower mold that remains inside the pressing frame. Then, the mixing and distributing hopper returns to the inside of the feed frame. Driven by a pressing drive mechanism, the pressing upper mold and the transfer lower mold supported by a pressing base are closed, and the sand core is pressed and formed between the pressing base and the transfer lower mold. After the transfer lower mold is separated from the pressing upper mold, the transfer lower mold can be moved to the inside of an output frame to output the pressed and formed sand core. Such a cyclic operation can continuously produce the sand cores required for the intelligent casting island, thereby improving the casting efficiency of the intelligent casting island.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent casting islands, and in particular to an adjustable sand core pressing device applied to an intelligent casting island. Background Art

[0002] The essence of the intelligent casting island is to build a fully collaborative casting production unit by integrating advanced technologies such as the Industrial Internet, the Internet of Things (IoT), robotics, big data analysis, and artificial intelligence (AI). The core goal of this system is to achieve precise control of the casting process, efficient resource utilization, and improved production efficiency. Sand cores are key components that form the inner cavity or complex structure of the casting during the casting process. Their manufacturing accuracy directly affects the dimensional stability and surface quality of the casting. Traditional sand core manufacturing relies on manual or semi-automatic equipment for compaction, which has problems such as large positioning deviation and uneven pressure, making the sand core prone to deformation or cracking during the subsequent pouring process.

[0003] Especially in the casting of automotive parts, products with complex cavities and multiple sand cores that require sand core molding, due to structural limitations, conventional sand core pressing devices are unable to press and mold complex sand cores, resulting in unstable sand core structures and inability to guarantee the position and size of the sand cores, which greatly increases labor intensity and deepens the difficulty of sand core mold matching. In addition, conventional sand core pressing devices mostly use mechanical connecting rods or hydraulic drive structures, and their inherent defects seriously restrict continuous production and affect production efficiency. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the present invention provides an adjustable sand core pressing device for a sand core applied to an intelligent casting island.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A device for pressing sand cores with adjustable properties applied to an intelligent casting island comprises a fixed frame, the fixed frame comprises a feeding frame, a pressing frame and an output frame, a storage hopper and a mixing and distributing hopper are arranged inside the feeding frame, a pressing driving mechanism, a pressing upper die and a pressing base are arranged inside the pressing frame, and a transfer lower die is arranged inside the output frame; the mixing and distributing hopper can slide back and forth inside the feeding frame and inside the pressing frame, and when the mixing and distributing hopper stays inside the feeding frame, it can mix the sand core raw material received from the storage hopper with the adhesive; The transfer lower mold can slide back and forth inside the output frame and the pressing frame. During the process of the mixing and distributing hopper moving from the inside of the feed frame to the inside of the pressing frame, the mixed sand core raw materials are distributed to the inside of the transfer lower mold remaining inside the pressing frame; the pressing drive mechanism can drive the pressing upper mold to move, close the pressing upper mold with the transfer lower mold supported by the pressing base, and press the sand core between the pressing base and the transfer lower mold; the transfer lower mold can move to the inside of the output frame to output the pressed sand core.

[0007] Preferably, the transfer lower mold includes a lower mold mounting frame, a replacement lower mold, a lower mold limiting rail and a lower mold driving unit; the lower mold mounting frame includes a positioning outer frame and an installation inner frame, and the positioning outer frame and the installation inner frame are elastically connected by a plurality of elastic connecting rods. Under the restriction of each elastic connecting rod, the installation inner frame can only be displaced in the vertical direction with the positioning outer frame; the replacement lower mold can be temporarily locked with the installation inner frame by fasteners, and the replacement lower mold can move synchronously with the movement of the installation inner frame.

[0008] Preferably, the two ends of the lower die limiting rail respectively extend to the two ends of the pressing frame and the output frame away from each other, and positioning pulleys are also provided on both sides of the positioning outer frame, and the positioning pulleys can be respectively embedded in the lower die limiting rail; the lower die driving unit includes a lower die driving connecting rod and a lower die driving cylinder, one end of the lower die driving connecting rod is rotatably connected to the side of the pressing frame close to the output frame, the other end of the lower die driving connecting rod is rotatably connected to the positioning outer frame, and the movable end of the lower die driving cylinder is rotatably connected to the middle part of the lower die driving connecting rod.

[0009] Preferably, the pressing upper mold includes an upper mold mounting frame and a replacement upper mold, and the replacement upper mold and the upper mold mounting frame are temporarily locked by fasteners; the replacement lower mold includes a sand core cavity and an overflow cavity, and the sand core cavity and the overflow cavity are connected, and the mixing hopper can distribute the mixed sand core raw materials to the inside of the sand core cavity.

[0010] Preferably, when the replacement upper mold and the replacement lower mold are closed, the excess mixed sand core raw material inside the sand core cavity can be pressed and discharged into the overflow cavity; heating elements are provided inside the replacement upper mold and on the inner wall of the sand core cavity. After the excess mixed sand core raw material inside the sand core cavity is discharged, the heating elements can heat to promote the curing of the adhesive and harden the sand core of the sand core cavity.

[0011] Preferably, the mixing and distributing hopper includes a fixed baffle plate, a movable mixing trough, a mixing unit, a distributing limit track and a distributing drive unit; the fixed baffle plate is arranged directly below the storage hopper inside the feed frame, the bottom end of the movable mixing trough is open, and the area of ​​the fixed baffle plate is larger than the bottom end opening area of ​​the movable mixing trough; the distributing drive unit includes a distributing drive connecting rod and a distributing drive cylinder, one end of the distributing drive connecting rod is rotatably connected to the side of the feed frame away from the pressing frame, the other end of the distributing drive connecting rod is rotatably connected to the movable mixing trough, and the movable end of the distributing drive cylinder is rotatably connected to the middle part of the distributing drive connecting rod.

[0012] Preferably, the mixing unit includes a mixing motor and several mixing shafts, the mixing motor is fixed on the side of the movable mixing trough away from the pressing frame, and several mixing rods are provided on the outside of each of the mixing shafts, and the mixing motor is dynamically connected to each of the mixing shafts; the mixing motor can mix the sand core raw material and the adhesive inside the movable mixing trough by driving each of the mixing rods of the mixing shafts to rotate around the corresponding mixing shafts.

[0013] Preferably, both ends of the material distribution limit track extend to the two ends of the feeding frame and the pressing frame away from each other, and a limiting pulley is provided on the outside of the movable mixing trough, and the limiting pulley can be respectively embedded in the interior of the material distribution limit track; the bottom end of the movable mixing trough close to the transfer lower mold is provided with a pressing notch, and in the process of the material distribution drive cylinder driving the movable mixing trough to move toward the side of the transfer lower mold, under the action of the pressing notch, the upper surface of the molding cavity of the transfer lower mold is coplanar with the upper surface of the fixed baffle plate, and the mixed sand core raw material can be distributed inside the molding cavity of the transfer lower mold through the bottom end opening of the movable mixing trough.

[0014] Preferably, a quantitative discharger is provided at the bottom end of the storage hopper, and the quantitative discharger can quantitatively discharge the sand core raw materials stored in the storage hopper into the mixing and distributing hopper; the pressing base includes a connecting saddle, a buffer seat and a supporting top seat, the connecting saddle is fixed to the bottom end of the pressing frame, the buffer seat is elastically connected to the connecting saddle through a plurality of buffer springs, and the supporting top seat is fixed to the top of the buffer seat.

[0015] Preferably, the pressing drive mechanism includes a pressing limit frame, a plurality of pressing guide rods and a plurality of pressing drive cylinders, the pressing limit frame is fixed to the pressing frame, each of the pressing guide rods passes through the pressing upper mold respectively, and the movable end of each of the pressing drive cylinders is fixed between the top end of the pressing upper mold; the pressing drive cylinder drives the pressing upper mold to move, and during the process of closing the pressing upper mold with the transfer lower mold, as the pressing upper mold continues to move, the compression of each of the buffer springs of the buffer seat provides a gradually increasing elastic support force to the transfer lower mold.

[0016] Compared with the prior art, the present invention provides an adjustable sand core pressing device for an intelligent casting island, which has the following beneficial effects:

[0017] 1. The sand core of the intelligent casting island can be adjusted to press the sand core. After the sand core raw materials and the adhesive are fully mixed inside the mixing and distributing hopper, the transfer lower die moves from the output frame to the inside of the pressing frame and stays on the side of the pressing frame close to the feed frame. In the process of moving from the inside of the feed frame to the inside of the pressing frame, the mixing and distributing hopper distributes the mixed sand core raw materials to the transfer lower die staying inside the pressing frame. Then the mixing and distributing hopper returns to the inside of the feed frame. Driven by the pressing drive mechanism, the pressing upper die and the transfer lower die supported by the pressing base are closed, and the sand core is pressed and formed between the pressing base and the transfer lower die. After the transfer lower die is separated from the pressing upper die, the transfer lower die can be moved to the inside of the output frame to output the pressed sand core. Such a cyclic operation can continuously produce the sand cores required by the intelligent casting island, thereby improving the casting efficiency of the intelligent casting island.

[0018] 2. The sand core of the intelligent casting island can be adjusted by the sand core clamping device. During the mold closing process between the replaced lower mold and the replaced upper mold, the replaced lower mold can only be displaced in the vertical direction to cooperate with the sand core pressing process. Through the setting of the overflow trough, the excess mixed sand core raw materials inside the sand core cavity are pressed and discharged into the overflow cavity. By replacing the heating elements set inside the upper mold and the inner wall of the sand core cavity, after the excess mixed sand core raw materials inside the sand core cavity are discharged, the heating elements can heat to promote the curing of the adhesive and harden the sand core of the sand core cavity, which can effectively ensure that the sand core raw materials are fully cured during the pressing and heating process, ensure the molding effect of the sand core, and ensure the casting molding effect of the workpiece produced by casting on the intelligent casting island.

[0019] 3. This type of sand core adjustable sand core clamping device used in the intelligent casting island, in the process of the cloth driving cylinder driving the movable mixing trough to move toward the side of the transfer lower mold, under the action of the pressing cut, the upper surface of the molding cavity of the transfer lower mold and the upper surface of the fixed baffle plate are coplanar, and the mixed sand core raw materials can be distributed inside the molding cavity of the transfer lower mold through the bottom opening of the movable mixing trough.

[0020] 4. The sand core of this type of sand core used in the intelligent casting island can adjust the sand core clamping device. When the pressing drive cylinder drives the pressing upper mold to move, during the process of closing the pressing upper mold and the transfer lower mold, as the pressing upper mold continues to move, the various buffer springs of the buffer seat are compressed to provide a gradually increasing elastic support force to the transfer lower mold, so as to provide a greater molding pressure inside the molding cavity between the pressing upper mold and the transfer lower mold, so as to ensure the compactness of the sand core after molding and ensure the casting molding effect of the workpiece produced by casting in the intelligent casting island. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is one of the three-dimensional structural schematic diagrams of an adjustable sand core pressing device for a sand core applied to an intelligent casting island according to the present invention;

[0022] Figure 2 This is the second overall exploded schematic diagram of an adjustable sand core pressing device for a sand core applied to an intelligent casting island according to the present invention;

[0023] Figure 3 This is a partial structural schematic diagram of a mixing and distributing hopper of a sand core adjustable sand core pressing device applied to an intelligent casting island according to the present invention;

[0024] Figure 4 This is a second partial structural diagram of a mixing and distributing hopper of a sand core adjustable sand core pressing device applied to an intelligent casting island according to the present invention;

[0025] Figure 5 This is a partial structural schematic diagram of an adjustable sand core pressing device for a sand core applied to an intelligent casting island according to the present invention;

[0026] Figure 6 This is a second partial structural diagram of an adjustable sand core pressing device for a sand core applied to an intelligent casting island according to the present invention;

[0027] Figure 7 This is one of the three-dimensional structural schematic diagrams of a pressing upper die, a pressing base, and a transfer lower die of an adjustable sand core pressing device for a sand core applied to an intelligent casting island of the present invention;

[0028] Figure 8 This is a second schematic diagram of the three-dimensional structure of a pressing upper die, a pressing base, and a transfer lower die of an adjustable sand core pressing device for a sand core applied to an intelligent casting island according to the present invention;

[0029] Figure 9 The present invention is a schematic diagram of the assembly structure of a lower mold installation frame and a replacement lower mold of an adjustable sand core clamping device for sand cores used in an intelligent casting island.

[0030] In the figure: 1. Fixed frame; 11. Feed frame; 12. Pressing frame; 13. Output frame; 2. Storage hopper; 3. Mixing and distributing hopper; 31. Fixed baffle plate; 32. Movable mixing trough; 321. Limiting pulley; 322. Pressing notch; 33. Mixing unit; 331. Mixing motor; 332. Mixing shaft; 333. Mixing lever; 34. Distributing limiting rail; 35. Distributing drive unit; 351. Distributing drive connecting rod; 352. Distributing drive cylinder; 4. Pressing drive mechanism; 41. Pressing limiting frame; 42. Pressing guide rod; 43 , pressing drive cylinder; 5. Pressing upper mold; 51. Upper mold mounting frame; 52. Replacement of upper mold; 6. Pressing base; 61. Connecting saddle; 62. Buffer seat; 621. Buffer spring; 63. Support top seat; 7. Transfer lower mold; 71. Lower mold mounting frame; 711. Positioning outer frame; 712. Install inner frame; 713. Elastic connecting rod; 714. Positioning pulley; 72. Replacement of lower mold; 721. Sand core cavity; 722. Overflow cavity; 73. Lower mold limiting track; 74. Lower mold driving unit; 741. Lower mold driving connecting rod; 742. Lower mold driving cylinder. DETAILED DESCRIPTION

[0031] 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.

[0032] As introduced in the background technology, in order to solve the deficiencies in the existing technology, the present application proposes an adjustable sand core clamping device for use in an intelligent casting island.

[0033] Example 1

[0034] See also Figures 1-9, a sand core adjustable sand core pressing device for intelligent casting island, comprising a fixed frame 1, the fixed frame 1 comprising a feeding frame 11, a pressing frame 12 and an output frame 13, a storage hopper 2 and a mixing and distributing hopper 3 are arranged inside the feeding frame 11, a pressing drive mechanism 4, a pressing upper die 5 and a pressing base 6 are arranged inside the pressing frame 12, and a transfer lower die 7 is arranged inside the output frame 13; the mixing and distributing hopper 3 can slide back and forth inside the feeding frame 11 and the pressing frame 12, and when the mixing and distributing hopper 3 stays inside the feeding frame 11, it can mix the sand core raw materials received from the storage hopper 2 with the sand core raw materials The adhesives are mixed; the transfer lower mold 7 can slide back and forth inside the output frame 13 and the pressing frame 12, and in the process of the mixing hopper 3 moving from the inside of the feed frame 11 to the inside of the pressing frame 12, the mixed sand core raw materials are distributed to the transfer lower mold 7 that remains inside the pressing frame 12; the pressing drive mechanism 4 can drive the pressing upper mold 5 to move, and close the pressing upper mold 5 with the transfer lower mold 7 supported by the pressing base 6, and press the sand core between the pressing base 6 and the transfer lower mold 7; the transfer lower mold 7 can move to the inside of the output frame 13 to output the pressed sand core.

[0035] When in use, the sand core raw material is input into the storage hopper 2, and when in use, the sand core raw material can be continuously input into the storage hopper 2 by lifting the conveyor belt, lifting the auger, etc. When the mixing and distributing hopper 3 stays in the feeding frame 11, the storage hopper 2 can provide the sand core raw material to the mixing and distributing hopper 3, and an adhesive delivery structure is provided (the adhesive delivery structure is a common liquid delivery structure in the prior art, which will not be described here) to provide adhesive to the mixing and distributing hopper 3. Inside the mixing and distributing hopper 3, after the sand core raw material and the adhesive are fully mixed, the transfer lower mold 7 is moved from the output frame 13 to the inside of the pressing frame 12 and stays on the side of the pressing frame 12 close to the feeding frame 11, and the mixing and distributing hopper 3 is moved to the inside of the pressing frame 12. In the process of moving from the inside of the feed frame 11 to the inside of the pressing frame 12, the bucket 3 distributes the mixed sand core raw materials to the inside of the transfer lower mold 7 that remains inside the pressing frame 12, and then the mixing and distributing bucket 3 returns to the inside of the feed frame 11. Under the drive of the pressing drive mechanism 4, the pressing upper mold 5 and the transfer lower mold 7 supported by the pressing base 6 are closed, and the sand core is pressed and formed between the pressing base 6 and the transfer lower mold 7. After the transfer lower mold 7 is separated from the pressing upper mold 5, the transfer lower mold 7 can be moved to the inside of the output frame 13 to output the pressed sand core. Such a cyclic operation can continuously produce the sand cores required for the intelligent casting island, thereby improving the casting efficiency of the intelligent casting island.

[0036] Example 2

[0037] See also Figures 1-9, the difference from the above embodiment is that the transfer lower mold 7 includes a lower mold mounting frame 71, a replacement lower mold 72, a lower mold limiting rail 73 and a lower mold driving unit 74; the lower mold mounting frame 71 includes a positioning outer frame 711 and an installation inner frame 712, and the positioning outer frame 711 and the installation inner frame 712 are elastically connected by a plurality of elastic connecting rods 713. Under the restriction of each elastic connecting rod 713, the installation inner frame 712 can only be displaced in the vertical direction with the positioning outer frame 711; the replacement lower mold 72 can be temporarily locked with the installation inner frame 712 by fasteners, and the replacement lower mold 72 can move synchronously with the movement of the installation inner frame 712.

[0038] The two ends of the lower die limiting rail 73 extend to the two ends away from each other of the pressing frame 12 and the output frame 13, and positioning pulleys 714 are also provided on both sides of the positioning outer frame 711. The positioning pulleys 714 can be respectively embedded in the lower die limiting rail 73; the lower die driving unit 74 includes a lower die driving connecting rod 741 and a lower die driving cylinder 742. One end of the lower die driving connecting rod 741 is rotatably connected to the side of the pressing frame 12 close to the output frame 13, and the other end of the lower die driving connecting rod 741 is rotatably connected to the positioning outer frame 711. The movable end of the lower die driving cylinder 742 is rotatably connected to the middle part of the lower die driving connecting rod 741.

[0039] The pressing upper mold 5 includes an upper mold mounting frame 51 and a replacement upper mold 52, and the replacement upper mold 52 is temporarily locked to the upper mold mounting frame 51 by fasteners; the replacement lower mold 72 includes a sand core cavity 721 and an overflow cavity 722, and the sand core cavity 721 and the overflow cavity 722 are connected, and the mixing hopper 3 can distribute the mixed sand core raw materials to the inside of the sand core cavity 721.

[0040] When the replacement upper mold 52 and the replacement lower mold 72 are closed, the excess mixed sand core raw materials inside the sand core cavity 721 can be pressed and discharged into the overflow cavity 722; heating elements are provided inside the replacement upper mold 52 and on the inner wall of the sand core cavity 721. After the excess mixed sand core raw materials inside the sand core cavity 721 are discharged, the heating elements can heat to promote the curing of the adhesive and harden the sand core of the sand core cavity 721.

[0041] During specific use, both the replacement upper mold 52 and the replacement lower mold 72 can be replaced according to the type of sand cores actually produced, thereby adjusting the type of sand cores produced by the device;

[0042] Through the restriction of the lower die limiting rail 73, under the drive of the lower die driving cylinder 742, the movable end of the lower die driving connecting rod 741 can produce relative sliding between the pressing frame 12, and can drive the positioning outer frame 711 to carry the replacement lower die 72 to move back and forth between the pressing frame 12 and the output frame 13 under the restriction of the positioning pulley 714 and the lower die limiting rail 73, so as to cooperate with the laying of the sand core raw material inside the replacement lower die 72 and the sand core pressing process. During the sand core pressing process, the positioning outer frame 711 and the installation inner frame 712 are elastically connected by a number of elastic connecting rods 713, and the replacement lower die 72 and the installation inner frame 712 are temporarily locked by fasteners. Under the restriction of each elastic connecting rod 713, the installation inner frame 712 can only be connected to the positioning outer frame 711. The replacement lower mold 72 is displaced in the vertical direction, so that during the mold closing process between the replacement lower mold 72 and the replacement upper mold 52, the replacement lower mold 72 can only be displaced in the vertical direction to cooperate with the sand core pressing process. Through the setting of the overflow groove 722, the excess mixed sand core raw material inside the sand core cavity 721 is pressed and discharged into the overflow cavity 722. By setting the heating elements inside the replacement upper mold 52 and the inner wall of the sand core cavity 721, after the excess mixed sand core raw material inside the sand core cavity 721 is discharged, the heating elements can heat to promote the curing of the adhesive and harden the sand core of the sand core cavity 721, and can effectively ensure that the sand core raw material is fully cured during the pressing and heating process, ensure the molding effect of the sand core, and ensure the casting molding effect of the workpiece produced by casting on the intelligent casting island.

[0043] Example 3

[0044] See also Figures 1-9 , the difference from the above embodiment is that the mixing and distributing hopper 3 includes a fixed baffle plate 31, a movable mixing trough 32, a mixing unit 33, a distributing limit track 34 and a distributing drive unit 35; the fixed baffle plate 31 is arranged directly below the storage hopper 2 inside the feed frame 11, the bottom end of the movable mixing trough 32 is open, and the area of ​​the fixed baffle plate 31 is larger than the bottom end opening area of ​​the movable mixing trough 32; the distributing drive unit 35 includes a distributing drive connecting rod 351 and a distributing drive cylinder 352, one end of the distributing drive connecting rod 351 is rotatably connected to the side of the feed frame 11 away from the pressing frame 12, the other end of the distributing drive connecting rod 351 is rotatably connected to the movable mixing trough 32, and the movable end of the distributing drive cylinder 352 is rotatably connected to the middle part of the distributing drive connecting rod 351.

[0045] The mixing unit 33 includes a mixing motor 331 and several mixing shafts 332. The mixing motor 331 is fixed to the side of the movable mixing trough 32 away from the pressing frame 12. Several mixing rods 333 are provided on the outside of each mixing shaft 332. The mixing motor 331 is power-connected to each mixing shaft 332. The mixing motor 331 can mix the sand core raw materials and the adhesive inside the movable mixing trough 32 by driving each mixing rod 333 of each mixing shaft 332 to rotate around the corresponding mixing shaft 332.

[0046] The two ends of the cloth limiting track 34 extend to the two ends away from each other of the feeding frame 11 and the pressing frame 12, and a limiting pulley 321 is provided on the outside of the movable mixing trough 32, and the limiting pulley 321 can be respectively embedded in the inside of the cloth limiting track 34; the bottom end of the movable mixing trough 32 close to the transfer lower mold 7 is provided with a pressing cutout 322. In the process of the cloth driving cylinder 352 driving the movable mixing trough 32 to move toward the side of the transfer lower mold 7, under the action of the pressing cutout 322, the upper surface of the molding cavity of the transfer lower mold 7 is coplanar with the upper surface of the fixed baffle plate 31, and the mixed sand core raw material can be distributed inside the molding cavity of the transfer lower mold 7 through the bottom opening of the movable mixing trough 32.

[0047] When in use, the maximum elastic deformation degree and elastic coefficient of each elastic connecting rod 713 can be adjusted according to the type of replacement lower mold 72. During the material dispensing process, it is ensured that the upper surface of the replacement lower mold 72 is flush with the upper surface of the fixed baffle plate 31, and the mixing motor 331 can drive each mixing lever 333 of each mixing shaft 332 to rotate around the corresponding mixing shaft 332 to mix the sand core material and adhesive inside the movable mixing tank 32. Then, through the joint restriction of the limiting pulley 321 and the material dispensing limiting track 34, under the drive of the material dispensing driving cylinder 352, the movable end of the material dispensing driving connecting rod 351 can be aligned with the feed frame 1 1, and drives the movable mixing trough 32 to carry the mixing unit 33 to slide back and forth between the feeding frame 11 and the pressing frame 12, and in the process of the distribution driving cylinder 352 driving the movable mixing trough 32 to move to the side of the transfer lower mold 7, under the action of the pressing cutout 322, the upper surface of the molding cavity of the transfer lower mold 7 is coplanar with the upper surface of the fixed baffle plate 31 (to adapt to the slight misalignment between the two planes caused by the excessive adjustment range of the elastic connecting rod 713), and the mixed sand core raw materials can be distributed inside the molding cavity of the transfer lower mold 7 through the bottom end opening of the movable mixing trough 32, so as to complete the uniform mixing and distribution steps of the sand core raw materials.

[0048] Example 4

[0049] See also Figures 1-9The difference from the above embodiment is that a quantitative discharger is provided at the bottom of the storage hopper 2, which can quantitatively discharge the sand core raw materials stored in the storage hopper 2 into the mixing and distributing hopper 3; the pressing base 6 includes a connecting saddle 61, a buffer seat 62 and a supporting top seat 63, the connecting saddle 61 is fixed to the bottom end of the pressing frame 12, the buffer seat 62 is elastically connected to the connecting saddle 61 through a number of buffer springs 621, and the supporting top seat 63 is fixed to the top of the buffer seat 62.

[0050] The pressing drive mechanism 4 includes a pressing limit frame 41, several pressing guide rods 42 and several pressing drive cylinders 43. The pressing limit frame 41 is fixed to the pressing frame 12, and each pressing guide rod 42 passes through the pressing upper mold 5 respectively. The movable end of each pressing drive cylinder 43 is fixed between the top of the pressing upper mold 5; when the pressing drive cylinder 43 drives the pressing upper mold 5 to move, in the process of closing the pressing upper mold 5 and the transfer lower mold 7, as the pressing upper mold 5 continues to move, the various buffer springs 621 of the buffer seat 62 are compressed to provide a gradually increasing elastic support force to the transfer lower mold 7.

[0051] During specific use, the sand core raw materials stored in the storage hopper 2 can be quantitatively fed into the mixing and distributing hopper 3 through the quantitative discharger, thereby reducing the waste of sand core raw materials. The pressing drive cylinder 43 drives the pressing upper mold 5 to move. During the process of closing the pressing upper mold 5 and the transfer lower mold 7, as the pressing upper mold 5 continues to move, the various buffer springs 621 of the buffer seat 62 are compressed to provide a gradually increasing elastic support force to the transfer lower mold 7, so as to provide a greater molding pressure inside the molding cavity between the pressing upper mold 5 and the transfer lower mold 7, so as to ensure the compactness of the sand core after molding, and ensure the casting molding effect of the workpiece produced by casting on the intelligent casting island.

[0052] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An adjustable sand core pressing device for an intelligent casting island, comprising a fixed frame, the fixed frame comprising a feed frame, a pressing frame, and an output frame, characterized in that: The feeding frame is provided with a storage hopper and a mixing and distributing hopper, the pressing frame is provided with a pressing drive mechanism, a pressing upper die and a pressing base, and the output frame is provided with a transfer lower die; The mixing and distributing hopper can slide back and forth inside the feeding frame and the pressing frame. When the mixing and distributing hopper stays inside the feeding frame, it can mix the sand core raw material received from the storage hopper with the adhesive. The transfer lower mold can slide back and forth inside the output frame and the pressing frame, and distributes the mixed sand core raw materials to the transfer lower mold that remains inside the pressing frame during the process of the mixing and distributing hopper moving from the inside of the feed frame to the inside of the pressing frame; The pressing drive mechanism is capable of driving the pressing upper die to move, closing the pressing upper die with the transfer lower die supported by the pressing base, and pressing and molding the sand core between the pressing base and the transfer lower die; The transfer lower mold can be moved into the output frame to output the pressed sand core; The transfer lower mold includes a lower mold installation frame, a replacement lower mold, a lower mold limiting track and a lower mold driving unit; The lower mold mounting frame includes a positioning outer frame and an installation inner frame, wherein the positioning outer frame and the installation inner frame are elastically connected via a plurality of elastic connecting rods. Under the restriction of each elastic connecting rod, the installation inner frame can only move vertically with the positioning outer frame; The replacement lower mold can be temporarily locked to the installation inner frame by fasteners, and the replacement lower mold can move synchronously with the movement of the installation inner frame; The mixing and distributing hopper comprises a fixed baffle plate, a movable mixing trough, a mixing unit, a distributing limiting track and a distributing driving unit; The fixed baffle plate is arranged just below the storage hopper inside the feed frame, the bottom end of the movable mixing trough is open, and the area of ​​the fixed baffle plate is larger than the bottom end opening area of ​​the movable mixing trough; The cloth driving unit includes a cloth driving connecting rod and a cloth driving cylinder. One end of the cloth driving connecting rod is rotatably connected to the side of the feeding frame away from the pressing frame, the other end of the cloth driving connecting rod is rotatably connected to the movable mixing trough, and the movable end of the cloth driving cylinder is rotatably connected to the middle part of the cloth driving connecting rod.

2. The adjustable sand core pressing device for an intelligent casting island according to claim 1 is characterized in that: The two ends of the lower die limiting track respectively extend to the two ends of the pressing frame and the output frame that are away from each other, and positioning pulleys are further provided on both sides of the positioning outer frame, and the positioning pulleys can be respectively embedded in the lower die limiting track; The lower die driving unit includes a lower die driving connecting rod and a lower die driving cylinder. One end of the lower die driving connecting rod is rotatably connected to the side of the pressing frame close to the output frame, the other end of the lower die driving connecting rod is rotatably connected to the positioning outer frame, and the movable end of the lower die driving cylinder is rotatably connected to the middle part of the lower die driving connecting rod.

3. The adjustable sand core pressing device for an intelligent casting island according to claim 1 is characterized in that: The pressing upper die includes an upper die mounting frame and a replacement upper die, and the replacement upper die is temporarily locked to the upper die mounting frame by a fastener; The replacement lower mold includes a sand core cavity and an overflow cavity, the sand core cavity and the overflow cavity are communicated with each other, and the mixing and distributing hopper can distribute the mixed sand core raw materials into the sand core cavity.

4. The adjustable sand core pressing device for an intelligent casting island according to claim 3 is characterized in that: When the replacement upper mold and the replacement lower mold are closed, the excess mixed sand core raw material in the sand core cavity can be pressed and discharged into the overflow cavity; Heating elements are provided inside the replacement upper mold and on the inner wall of the sand core cavity. After the excess mixed sand core raw materials inside the sand core cavity are discharged, the heating elements can heat and promote the curing of the adhesive and harden the sand core of the sand core cavity.

5. The adjustable sand core pressing device for an intelligent casting island according to claim 1 is characterized in that: The mixing unit includes a mixing motor and a plurality of mixing shafts. The mixing motor is fixed to a side of the movable mixing tank away from the pressing frame. A plurality of mixing levers are provided on the outside of each mixing shaft. The mixing motor is connected to each mixing shaft by power. The mixing motor can mix the sand core raw material and the adhesive inside the movable mixing tank by driving the mixing levers of the mixing shafts to rotate around the corresponding mixing shafts.

6. The adjustable sand core pressing device for an intelligent casting island according to claim 1 is characterized in that: The two ends of the material distribution limiting track respectively extend to the two ends of the feeding frame and the pressing frame that are away from each other, and a limiting pulley is provided on the outer side of the movable mixing trough, and the limiting pulley can be respectively embedded in the interior of the material distribution limiting track; A pressing notch is provided at the bottom end of the movable mixing trough close to the transfer lower mold. In the process of the material distribution driving cylinder driving the movable mixing trough to move toward the side of the transfer lower mold, under the action of the pressing notch, the upper surface of the molding cavity of the transfer lower mold is coplanar with the upper surface of the fixed baffle plate, and the mixed sand core raw materials can be distributed inside the molding cavity of the transfer lower mold through the bottom end opening of the movable mixing trough.

7. The adjustable sand core pressing device for an intelligent casting island according to claim 1 is characterized in that: A quantitative discharger is provided at the bottom of the storage hopper, and the quantitative discharger can quantitatively discharge the sand core raw materials stored in the storage hopper into the mixing and distributing hopper; The pressing base includes a connecting saddle, a buffer seat and a supporting top seat. The connecting saddle is fixed to the bottom end of the pressing frame. The buffer seat is elastically connected to the connecting saddle through a plurality of buffer springs. The supporting top seat is fixed to the top of the buffer seat.

8. The adjustable sand core pressing device for an intelligent casting island according to claim 7, characterized in that: The pressing drive mechanism includes a pressing limit frame, a plurality of pressing guide rods and a plurality of pressing drive cylinders, wherein the pressing limit frame is fixed to the pressing frame, each of the pressing guide rods passes through the pressing upper die, and the movable end of each of the pressing drive cylinders is fixed to the top end of the pressing upper die; When the pressing drive cylinder drives the pressing upper mold to move, and during the process of closing the pressing upper mold with the transfer lower mold, as the pressing upper mold continues to move, the compression of each buffer spring of the buffer seat provides a gradually increasing elastic supporting force to the transfer lower mold.

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