Efficient molding machine with automatic shakeout function

Abstract

The invention relates to the technical field of molding machines, in particular to an efficient molding machine with an automatic shakeout function, and a mold core is provided with a push rod assembly capable of synchronously doing up-down telescopic motion when a vibration table vibrates up and down; the sand box device comprises a sand box body; the sand box body is provided with a first guide cylinder and a second guide cylinder; the first guide cylinder and the second guide cylinder are in one-way transmission connection; an elastic energy storage piece is arranged between the second guide cylinder and the sand box body; a cam structure is arranged on the outer side wall of the first guide cylinder; the cam structure comprises a plurality of cam grooves; a driving groove is formed in the inner wall of the second guide cylinder; the driving groove is matched with the push rod assembly; a plurality of beating assemblies which are sequentially arranged in the vertical direction are movably arranged in the sand box body; the beating assembly movably abuts against the outer side wall of the first guide cylinder. When the first guide cylinders rotate, the beating assemblies do telescopic motion in the diagonal direction of the sand box body under the action of the corresponding cam grooves; according to the invention, automatic shakeout treatment is realized, additional procedures are not needed, and the production efficiency of sand mold manufacturing is effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of molding machines, in particular to a high-efficiency molding machine with automatic sand dropping. BACKGROUND

[0002] The traditional sand mold manufacturing process involves multiple complex links, among which the forming and sand dropping processes of the sand mold have a significant impact on the quality and production efficiency of the casting; in the sand mold vibration shaping process of the existing molding machine, the sand mold is compacted by vibrating the sand box.

[0003] However, after the sand mold is demolded, additional processes are required to drop the sand particles remaining in the corners and other positions of the sand box cavity, which affects the production efficiency of sand mold manufacturing. SUMMARY

[0004] The present application aims to overcome the above-mentioned shortcomings and provide a high-efficiency molding machine with automatic sand dropping, thereby realizing automatic sand dropping without additional processes and effectively improving the production efficiency of sand mold manufacturing.

[0005] To achieve the above-mentioned purposes, the specific solutions of the present application are as follows: A high-efficiency molding machine with automatic sand dropping, comprising a machine table, a vibration table arranged on the machine table, a mold core arranged on the vibration table, a sand box device arranged on the mold core, and an upper punch arranged above the vibration table. Each corner position of the mold core is provided with a push rod assembly capable of synchronous up-down extension movement when the vibration table is vibrated up and down. The sand box device comprises a sand box body; a first guide cylinder and a second guide cylinder are arranged at each corner position of the sand box body; the first guide cylinder and the second guide cylinder are connected in one-way transmission; an elastic energy storage member is arranged between the second guide cylinder and the sand box body; the outer side wall of the first guide cylinder is provided with a plurality of cam structures arranged in the vertical direction; each group of cam structures comprises a plurality of cam grooves distributed in the circumferential direction; the inner wall of the second guide cylinder is provided with a driving groove; the driving groove cooperates with the push rod assembly to drive the second guide cylinder to rotate relative to the first guide cylinder, so as to store energy in the elastic energy storage member. A plurality of knocking assemblies arranged in the vertical direction are movably arranged at each corner position in the sand box body; each knocking assembly movably abuts against the outer side wall of the first guide cylinder; when the first guide cylinder rotates, the knocking assembly moves in the diagonal direction of the sand box body under the action of the corresponding cam groove, and knocks the inner corner of the sand box body.

[0006] Further, each of the knocking assemblies comprises a first top rod, a first spring, a first permanent magnet, a second spring, a second top rod and a second permanent magnet; the inner wall of the sand box body is provided with a first guide cylinder extending along the diagonal line of the sand box body corresponding to each knocking assembly; the first top rod is movably arranged in the sand box body and coaxially arranged with the corresponding first guide cylinder; one end of the first top rod movably abuts against the outer wall of the first guide cylinder; the two ends of the first spring movably abut against one end of the first top rod and the inner wall of the sand box body respectively; the first permanent magnet is arranged at the other end of the first top rod; the second top rod is movably sleeved on the outer wall of the corresponding first guide cylinder; the second permanent magnet is opposite to the first permanent magnet in polarity; the second permanent magnet is arranged in the second top rod; one end of the second spring is arranged in the corresponding first guide cylinder; the other end of the second spring abuts against the second permanent magnet; the elastic force of the first spring is greater than the magnetic attraction force between the first permanent magnet and the second permanent magnet; the magnetic attraction force between the first permanent magnet and the second permanent magnet is greater than the elastic force of the second spring.

[0007] Further, the push rod assembly comprises a sliding sleeve, a counterweight, a first tension spring, a driving pin shaft and a third spring; the mold core is provided with a second guide cylinder corresponding to each push rod assembly; one end of the sliding sleeve is movably arranged in the second guide cylinder; the first tension spring is arranged in the second guide cylinder; one end of the first tension spring is connected with the mold core, and the other end is connected with the inner wall of the sliding sleeve; the driving pin shaft is movably arranged at the other end of the sliding sleeve along the radial direction of the sliding sleeve; the third spring is arranged in the other end of the sliding sleeve; one end of the third spring is connected with the inner wall of the driving pin shaft; the other end of the third spring is connected with the sliding sleeve; the counterweight is arranged at the top of the sliding sleeve.

[0008] Further, the second guide cylinder is provided with a guide column inside; the sliding sleeve is provided with a third guide cylinder inside; and the third guide cylinder is movably sleeved on the outer wall of the guide column.

[0009] Further, the sand box body is provided with a guide hole corresponding to the position of each first guide cylinder; the opening of the guide hole is provided with a first chamfer; and the bottom end of the second guide cylinder is provided with a second chamfer.

[0010] Further, the elastic energy storage member is a coil spring; the coil spring is arranged between the bottom end of the second guide cylinder and the corresponding guide hole; and the minimum inner diameter of the coil spring is greater than or equal to the hole diameter of the guide hole.

[0011] Further, the driving groove comprises a plurality of vertical grooves and a plurality of spiral grooves; the plurality of vertical grooves and the plurality of spiral grooves are sequentially connected in a head-to-tail manner; the top end of the spiral groove is provided with a first blocking step for blocking the driving pin shaft from entering the vertical groove; the bottom end of the vertical groove is provided with a second blocking step for blocking the driving pin shaft from entering the spiral groove; and the vertical groove is provided with a smooth transition slope.

[0012] Further, the inner wall of the first guide sleeve is uniformly distributed with one-way ratchet teeth in the circumferential direction; the outer wall of the second guide sleeve is uniformly distributed with one-way pawls which are one-way matched with the one-way ratchet teeth.

[0013] Further, the top end of the first guide sleeve extends with an extension arm; the extension arm is provided with a locking hole; a locking column is vertically extended at each corner position of the mold core; the locking column penetrates the locking hole.

[0014] Further, the sand box body is provided with a trapezoidal cavity and a rectangular cavity connected at the top end of the trapezoidal cavity.

[0015] The beneficial effects of the present application are: through the up-down telescopic movement of the push rod assembly, the elastic energy storage member is energized, so that when the elastic energy storage member releases the stored energy, the cam structure on the first guide sleeve drives the knocking assembly to do telescopic movement, and the inner corner position of the sand box body is continuously knocked, the sand grains remaining at the corner position in the cavity of the sand box body are shaken off and removed, so that the automatic shakeout process is realized, without additional process, and the production efficiency of the sand mold manufacturing is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic diagram of the present application; Figure 2 is a structural schematic diagram of the cooperation of the mold core and the push rod assembly of the present application; Figure 3 is a cross-sectional schematic diagram of the cooperation of the mold core and the push rod assembly of the present application; Figure 4 is a structural schematic diagram of the present application; Figure 3 is a local enlarged schematic diagram of A in the structural schematic diagram of the present application; Figure 5 is a structural schematic diagram of the sand box device of the present application; Figure 6 is a cross-sectional schematic diagram of the sand box device of the present application; Figure 7 is a structural schematic diagram of the present application; Figure 6 is a local enlarged schematic diagram of B in the structural schematic diagram of the present application; Figure 8 is a structural schematic diagram of the first guide sleeve of the present application; Figure 9 is a cross-sectional schematic diagram of the first guide sleeve of the present application; Figure 10 is a cross-sectional schematic diagram of the second guide sleeve of the present application; Figure 11 is a cross-sectional schematic diagram of the knocking assembly of the present application; Explanation of Reference Numerals: 1. Machine; 2. Vibration table; 31. Mold core; 311. Second guide cylinder; 312. Guide column; 313. Locking column; 321. Sliding sleeve; 3211. Third guide cylinder; 322. Counterweight; 323. First tension spring; 324. Drive pin; 325. Third spring; 41. Sand box body; 411. First guide cylinder; 412. Guide hole; 413. First chamfer; 42. First guide cylinder; 421. Cam groove; 422 , one-way ratchet; 423, extension arm; 424, locking hole; 43, second guide cylinder; 431, vertical groove; 432, spiral groove; 433, first blocking step; 434, second blocking step; 435, second chamfer; 436, one-way pawl; 44, elastic energy storage part; 451, first push rod; 452, first spring; 453, first permanent magnet; 454, second spring; 455, second push rod; 456, second permanent magnet; 5, upper pressure head. DETAILED DESCRIPTION

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but the scope of implementation of the present invention is not limited thereto.

[0018] like Figures 1 to 11 As shown, the embodiment of this invention describes a high-efficiency molding machine with automatic sand shakeout, comprising a machine platform 1, a vibration table 2 mounted on the machine platform 1, a mold core 31 mounted on the vibration table 2, a flask assembly mounted on the mold core 31, and an upper ram 5 mounted above the vibration table 2. The machine platform 1, serving as the basic support component, is welded from high-strength steel to ensure the stability of the entire device during operation. The vibration table 2 is mounted on the machine platform 1 and contains a vibration motor that drives the vibration table 2 up and down, providing power for compacting the sand mold and subsequent sand shakeout. The mold core 31 has a square outline and is fixed to the vibration table 2, vibrating with it. The shape of the mold core 31 matches the inner cavity of the sand mold to be produced, making it a key component in sand mold formation. The flask assembly is mounted on the mold core 31 to hold the molding sand. The upper ram 5 is located above the vibration table 2 and can move downward under the power of the motor, cooperating with the vibration table 2 to compact the molding sand within the flask assembly.

[0019] like Figure 2 As shown, push rod assemblies are respectively installed at the four corner positions of the mold core 31. These push rod assemblies can synchronously perform up and down telescopic movements when the vibration table 2 vibrates up and down.

[0020] The sand box body 41 of the sand box device is made of cast iron, which has high strength and wear resistance. The sand box body 41 is roughly in the shape of a square frame. Figure 5As shown, the four corners of the sand box body 41 are rotatably provided with the first guide cylinder 42 and the second guide cylinder 43, the first guide cylinder 42 is sleeved outside the second guide cylinder 43, and a one-way transmission connection is formed between the two, when the second guide cylinder 43 rotates counterclockwise, the second guide cylinder 43 rotates relative to the first guide cylinder 42, and the second guide cylinder 43 remains not to rotate; when the second guide cylinder 43 rotates clockwise, the second guide cylinder 43 can drive the first guide cylinder 42 to rotate together.

[0021] As shown in the drawings, Figure 7 An elastic energy storage member 44 is arranged between the second guide cylinder 43 and the sand box body 41, which is twisted when the second guide cylinder 43 rotates relative to the first guide cylinder 42, thereby storing elastic potential energy; the outer wall of the first guide cylinder 42 is processed with a plurality of cam structures arranged vertically, each cam structure contains a plurality of cam grooves 421 uniformly distributed in the circumferential direction, and the shape of the cam groove 421 can be designed as one side inclined and one side vertical, which is convenient for pushing the subsequent knocking assembly to move. As shown in the drawings, Figure 7 and Figure 10 As shown, the inner wall of the second guide cylinder 43 is provided with a driving groove, and the driving groove is matched with the push rod assembly, when the push rod assembly moves up and down with the vibration table 2, the push rod assembly is matched with the driving groove, thereby driving the second guide cylinder 43 to rotate relative to the first guide cylinder 42, so that the elastic energy storage member 44 gradually stores energy.

[0022] The four corners in the sand box body 41 are respectively movably provided with a plurality of knocking assemblies arranged vertically, and each knocking assembly movably abuts against the outer wall of the first guide cylinder 42. When the first guide cylinder 42 rotates under the driving of the energy released by the elastic energy storage member 44, the knocking assembly will make extension and contraction movement along the diagonal direction of the sand box body 41 under the action of the corresponding cam groove 421, repeatedly knock the inner corner of the sand box body 41, shake off the residual sand particles, realize automatic sand dropping treatment, and do not need additional process, effectively improve the production efficiency of sand mold manufacturing.

[0023] As shown in the drawings, Figure 7 and Figure 11As shown, the high-efficiency molding machine with automatic sand dropping described in the embodiment comprises a first top rod 451, a first spring 452, a first permanent magnet 453, a second spring 454, a second top rod 455 and a second permanent magnet 456; the inner wall of the sand box body 41 is provided with a first guide cylinder 411 extending along the diagonal line of the sand box body 41 corresponding to each knocking assembly; the first top rod 451 is movably arranged in the sand box body 41 and coaxially arranged with the corresponding first guide cylinder 411; one end of the first top rod 451 movably abuts against the outer wall of the first guide cylinder 42; the two ends of the first spring 452 movably abut against one end of the first top rod 451 and the inner wall of the sand box body 41 respectively; the first permanent magnet 453 is arranged at the other end of the first top rod 451; the second top rod 455 is movably sleeved on the outer wall of the corresponding first guide cylinder 411; the second permanent magnet 456 is opposite in polarity to the first permanent magnet 453; the second permanent magnet 456 is arranged in the second top rod 455; one end of the second spring 454 is arranged in the corresponding first guide cylinder 411; the other end of the second spring 454 abuts against the second permanent magnet 456; the elastic force of the first spring 452 is greater than the magnetic attraction force between the first permanent magnet 453 and the second permanent magnet 456; the magnetic attraction force between the first permanent magnet 453 and the second permanent magnet 456 is greater than the elastic force of the second spring 454.

[0024] Specifically, when the first top rod 451 corresponds to the position of the cam groove 421, the first spring 452 pushes the first top rod 451 to extend into the cam groove 421, the first top rod 451 drives the first permanent magnet 453 to move away from the second permanent magnet 456, so that the magnetic attraction force between the first permanent magnet 453 and the second permanent magnet 456 decreases, at this time the second spring 454 pushes the second top rod 455 to move away from the first top rod 451, so as to knock on the inner wall of the sand box body 41; when the first top rod 451 gradually moves away from the cam groove 421, the first guide cylinder 42 extrudes the first top rod 451 to shrink, the first spring 452 is compressed, so that the magnetic attraction force between the first permanent magnet 453 and the second permanent magnet 456 increases, until the second top rod 455 moves towards the first top rod 451 under the action of the magnetic attraction force and overcomes the elastic force of the second spring 454; in this way, the second top rod 455 continuously extends and retracts, so as to repeatedly knock the inner corner of the sand box body 41, shake off the residual sand particles, realize automatic sand dropping, and effectively improve the production efficiency of sand mold manufacturing.

[0025] As Figure 4As shown, the high-efficiency molding machine with automatic sand dropping described in the embodiment comprises a push rod assembly, a sliding sleeve 321, a counterweight 322, a first tension spring 323, a driving pin shaft 324, and a third spring 325; the mold core 31 is provided with a second guide cylinder 311 corresponding to each push rod assembly; one end of the sliding sleeve 321 is movably arranged in the second guide cylinder 311; the first tension spring 323 is arranged in the second guide cylinder 311; one end of the first tension spring 323 is connected with the mold core 31, and the other end is connected with the inner wall of the sliding sleeve 321; the driving pin shaft 324 is movably arranged at the other end of the sliding sleeve 321 along the radial direction; the third spring 325 is arranged in the other end of the sliding sleeve 321; one end of the third spring 325 is connected with the inner wall of the driving pin shaft 324; the other end of the third spring 325 is connected with the sliding sleeve 321; and the counterweight 322 is arranged on the top of the sliding sleeve 321.

[0026] Specifically, the structure of the push rod assembly can ensure its stable up-down stretching movement when the vibration table 2 vibrates, and effectively drive the second guide cylinder 43 to rotate. The mold core 31 is provided with a second guide cylinder 311 corresponding to each push rod assembly, the second guide cylinder 311 is a cylindrical hollow structure, and is fixed on the mold core 31 to provide guidance for the movement of the sliding sleeve 321. When the sliding sleeve 321 moves upward, the first tension spring 323 is elongated to generate a downward pulling force to assist the sliding sleeve 321 to reset. The counterweight 322 is made of high-density metal material, which increases the inertia of the sliding sleeve 321. When the vibration table 2 vibrates up and down, the sliding sleeve 321 can produce more obvious up-down movement relative to the second guide cylinder 311 under the inertia of the counterweight 322, which enhances the cooperation effect of the push rod assembly and the driving groove, and more effectively drives the second guide cylinder 43 to rotate.

[0027] As shown in the drawings, Figure 4 The high-efficiency molding machine with automatic sand dropping described in the embodiment comprises a second guide cylinder 311, a third guide cylinder 3211, and a guide column 312. The second guide cylinder 311 is provided with the guide column 312 inside; the sliding sleeve 321 is provided with the third guide cylinder 3211 inside; and the third guide cylinder 3211 movably sheaths the outer wall of the guide column 312. This embodiment further improves the stability of the movement of the sliding sleeve 321 in the second guide cylinder 311 by the cooperation of the third guide cylinder 3211 and the guide column 312, preventing the sliding sleeve 321 from deviating or rotating during the movement. This structure design enables the sliding sleeve 321 to move along the fixed axis through the cooperation of the third guide cylinder 3211 and the guide column 312 when moving up and down, avoiding the shaking of the sliding sleeve 321, ensuring the precise cooperation of the driving pin shaft 324 and the driving groove, and improving the reliability of the work of the entire push rod assembly.

[0028] As shown in the drawings, Figure 7 and Figure 10As shown, the high-efficiency molding machine with automatic sand dropping described in the embodiment is provided with a guide hole 412 corresponding to the position of each first guide cylinder 42; the opening of the guide hole 412 is provided with a first chamfer 413; the bottom end of the second guide cylinder 43 is provided with a second chamfer 435. Specifically, the guide hole 412 of the embodiment is a circular through hole, which has a diameter slightly larger than the outer diameter of the sliding sleeve 321 in the push rod assembly, so as to facilitate the push rod assembly to pass through. The first chamfer 413 is forty-five degrees, and the second chamfer 435 is also forty-five degrees, which can guide the driving pin shaft 324 to smoothly enter the guide hole 412 and the second guide cylinder 43, avoid the driving pin shaft 324 from colliding with or jamming with the edge of the guide hole 412 and the edge of the second guide cylinder 43, and facilitate assembly.

[0029] As shown in the drawings, Figure 7 As shown, the high-efficiency molding machine with automatic sand dropping described in the embodiment is provided with an elastic energy storage member 44, which is a coil spring. The coil spring has the characteristics of compact structure and good energy storage effect; the coil spring is arranged between the bottom end of the second guide cylinder 43 and the corresponding guide hole 412; and the minimum inner diameter of the coil spring is greater than or equal to the hole diameter of the guide hole 412. Such design of the embodiment ensures that the driving pin shaft 324 does not jam during the process of penetrating into the second guide cylinder 43, and the assembly is more smooth.

[0030] As shown in the drawings, Figure 7 and Figure 10 As shown, the high-efficiency molding machine with automatic sand dropping described in the embodiment is provided with a driving groove including a plurality of vertical grooves 431 and a plurality of spiral grooves 432; the plurality of vertical grooves 431 and the plurality of spiral grooves 432 are sequentially connected in a head-to-tail manner to form a continuous annular groove; the top end of the spiral groove 432 is provided with a first blocking step 433 for blocking the driving pin shaft 324 from entering the vertical groove 431; the bottom end of the vertical groove 431 is provided with a second blocking step 434 for blocking the driving pin shaft 324 from entering the spiral groove 432; and the vertical groove 431 is provided with a smooth transition slope to facilitate the smooth movement of the driving pin shaft 324 in the vertical groove 431.

[0031] Specifically, when the driving pin shaft 324 moves to the top end of the vertical groove 431, the driving pin shaft 324 cannot move downward along the vertical groove 431 due to the blocking of the first blocking step 433, at this time the driving pin shaft 324 can only move along the spiral groove 432, thereby driving the second guide cylinder 43 to rotate counterclockwise, the spring is stored, and the driving pin shaft 324 enters the bottom end of the vertical groove 431 through the bottom end of the spiral groove 432, at this time the driving pin shaft 324 cannot move upward from the vertical groove 431 to the spiral groove 432 due to the blocking of the second blocking step 434, at this time the driving pin shaft 324 can only move upward along the vertical groove 431; such reciprocating, thereby when the push rod assembly reciprocates up and down, the second guide cylinder 43 is continuously driven to rotate counterclockwise relative to the first guide cylinder 42 through the cooperation of the driving pin shaft 324 and the spiral groove 432, thereby the spring is continuously stored.

[0032] As shown in Figure 9 and Figure 10 , the high-efficiency molding machine with automatic sand dropping described in the embodiment is provided with unidirectional ratchets 422 uniformly distributed along the circumference of the inner wall of the first guide cylinder 42; the outer wall of the second guide cylinder 43 is uniformly distributed with unidirectional pawls 436 which are unidirectionally matched with the unidirectional ratchets 422. Specifically, when the second guide cylinder 43 rotates counterclockwise under the drive of the push rod assembly, the end of the unidirectional pawl 436 contacts and slides along the inclined surface of the unidirectional ratchet 422 and cannot drive the first guide cylinder 42 to rotate; when the second guide cylinder 43 rotates clockwise under the action of the spring, the end of the unidirectional pawl 436 contacts the vertical surface of the unidirectional ratchet 422 and is clamped, thereby driving the first guide cylinder 42 to rotate clockwise, realizing the unidirectional transmission between the first guide cylinder 42 and the second guide cylinder 43, ensuring that the energy stored by the spring can be effectively transmitted to the first guide cylinder 42, thereby driving the knocking assembly to work.

[0033] As shown in Figures 1 to 3 , Figures 5 to 9 , the high-efficiency molding machine with automatic sand dropping described in the embodiment is provided with an extension arm 423 extending from the top end of the first guide cylinder 42; the extension arm 423 is provided with a locking hole 424; the four corner positions of the mold core 31 are also vertically extended with locking columns 313; the locking columns 313 penetrate through the locking holes 424. Specifically, when the sand box device is installed on the mold core 31, the locking column 313 penetrates through the locking hole 424, limiting the rotation of the first guide cylinder 42; when the sand box device needs to be operated, the sand box device is lifted upward, so that the locking column 313 is separated from the locking hole 424, and the first guide cylinder 42 can freely rotate, at this time the spring releases the stored energy, drives the second guide cylinder 43 to rotate clockwise, and the first guide cylinder 42 drives the knocking assembly to continuously perform the extension and contraction movement through the cam structure, thereby realizing the automatic knocking and sand dropping work.

[0034] As shown in Figure 6As shown, the high-efficiency molding machine with automatic sand dropout described in this embodiment has a trapezoidal cavity and a rectangular cavity connected to the top of the trapezoidal cavity within the flask body 41. Specifically, because the cavity of the flask body 41 is configured with a "rectangular + trapezoidal" cross-section, the vibration range of the upper ram 5 when pressing into the rectangular cavity is within the range of the rectangular cavity. This prevents sand particles in the lower trapezoidal cavity from escaping during vibration and ensures smooth demolding after the sand mold is completed.

[0035] like Figures 1 to 11 As shown, when the efficient molding machine with automatic sand falling of this embodiment is actually used, the mold core 31 is placed on a stable and solid vibration table 2 and ensures that it is firmly installed; the sand box body 41 is lowered through the locking column 313 and fixed to the vibration table 2 with bolts or other means, and an appropriate amount of molding sand is added to the sand box body 41; the molding machine is started, and the vibration table 2 drives the mold core 31 and the sand box device to vibrate up and down, and the upper pressure head 5 is pressed into the rectangular molding cavity of the sand box body 41. The molding sand in the sand box body 41 is gradually compacted under the action of vibration and pressure, and vibration shaping is performed; in this process, the counterweight block 322 in the push rod assembly overcomes the tension of the first tension spring 323 under the vibration inertia, driving the sliding sleeve 321 to slide up and down continuously; the driving pin 324 on the sliding sleeve 321 continuously slides on the spiral groove 432 on the inner wall of the second guide cylinder 43, thereby driving the second guide cylinder 43 to rotate unidirectionally counterclockwise, so that the coil spring continuously accumulates force; When the sand mold is vibrated and pressed, the fixed connection between the sand box body 41 and the vibration table 2 is released, and the sand box body 41 can be lifted up and demolded manually or by a robot. When the locking hole 424 on the first guide cylinder 42 is completely disengaged from the locking column 313, the coil spring instantly releases the stored energy, so that the second guide cylinder 43 drives the first guide cylinder 42 to rotate clockwise; since the outer wall of the first guide cylinder 42 is provided with a cam structure, as the first guide cylinder 42 rotates, the first push rod 451 continuously retracts and moves under the action of the cam groove 421; when the first push rod 451 falls into the cam groove 421, the magnetic attraction between it and the second push rod 455 is reduced, and under the action of the second spring 454, the second push rod 455 quickly pops out and hits the inner corner of the sand box body 41, shaking off and removing the residual sand particles at the corner position of the mold cavity of the sand box body 41, thereby realizing automatic sand falling processing.

[0036] The above description is only a preferred embodiment of the present invention. Therefore, any equivalent changes or modifications made according to the structure, characteristics and principles described in the scope of the patent application of the present invention are included in the protection scope of the patent application of the present invention.

Claims

1. A high efficiency molding machine with automatic knockout, characterized in that, The device comprises a machine table, a vibration table arranged on the machine table, a mold core arranged on the vibration table, a sand box device arranged on the mold core, and an upper pressing head arranged above the vibration table; Each corner position of the mold core is respectively provided with a push rod assembly capable of synchronously performing up-down telescopic movement when the vibration table is vibrated up and down; The sand box device comprises a sand box body; a first guide cylinder and a second guide cylinder are rotationally arranged at each corner position of the sand box body; the first guide cylinder and the second guide cylinder are unidirectionally connected in transmission; an elastic energy storage member is arranged between the second guide cylinder and the sand box body; an outer side wall of the first guide cylinder is provided with a plurality of cam structures arranged in sequence in the vertical direction; each group of cam structures comprises a plurality of cam grooves distributed in the circumferential direction; an inner wall of the second guide cylinder is provided with a driving groove; the driving groove is matched with the push rod assembly to drive the second guide cylinder to rotate relative to the first guide cylinder, so that the elastic energy storage member stores energy; A plurality of knocking assemblies arranged in sequence in the vertical direction are movably arranged at each corner position in the sand box body; each knocking assembly movably abuts against the outer side wall of the first guide cylinder; when the first guide cylinder rotates, the knocking assembly performs telescopic movement in the diagonal direction of the sand box body under the action of the corresponding cam groove, and knocks the inner corner of the sand box body.

2. The high efficiency molding machine with automatic knockout as claimed in claim 1, wherein, Each knocking assembly comprises a first top rod, a first spring, a first permanent magnet, a second spring, a second top rod, and a second permanent magnet; a first guide cylinder extending along the diagonal line of the sand box body is arranged on the inner wall of the sand box body corresponding to each knocking assembly; the first top rod is movably arranged in the sand box body and coaxially arranged with the corresponding first guide cylinder; one end of the first top rod movably abuts against the outer side wall of the first guide cylinder; the first spring is movably connected at both ends to one end of the first top rod and the inner wall of the sand box body; the first permanent magnet is arranged at the other end of the first top rod; the second top rod is movably arranged on the outer wall of the corresponding first guide cylinder; the second permanent magnet has a polarity opposite to that of the first permanent magnet; the second permanent magnet is arranged in the second top rod; one end of the second spring is arranged in the corresponding first guide cylinder; the other end of the second spring abuts against the second permanent magnet; the elastic force of the first spring is greater than the magnetic attraction force between the first permanent magnet and the second permanent magnet; the magnetic attraction force between the first permanent magnet and the second permanent magnet is greater than the elastic force of the second spring.

3. The high efficiency molding machine with automatic knockout as claimed in claim 1, wherein, The push rod assembly comprises a sliding sleeve, a counterweight, a first tension spring, a driving pin shaft, and a third spring; the mold core is respectively provided with a second guide cylinder corresponding to each push rod assembly; one end of the sliding sleeve is movably arranged in the second guide cylinder; the first tension spring is arranged in the second guide cylinder; one end of the first tension spring is connected to the mold core, and the other end is connected to the inner wall of the sliding sleeve; the driving pin shaft is movably arranged in the other end of the sliding sleeve in the radial direction of the sliding sleeve; the third spring is arranged in the other end of the sliding sleeve; one end of the third spring is connected to the inner wall of the driving pin shaft; the other end of the third spring is connected to the sliding sleeve; the counterweight is arranged on the top of the sliding sleeve.

4. The high efficiency molding machine with automatic knockout as claimed in claim 3, wherein, A guide column is protrusively arranged in the second guide cylinder; a third guide cylinder is protrusively arranged in the sliding sleeve; the third guide cylinder is movably arranged on the outer wall of the guide column.

5. The high efficiency molding machine with automatic knockout as claimed in claim 3, wherein, The sand box body is respectively provided with a guide hole corresponding to the position of each first guide cylinder; the opening of the guide hole is provided with a first chamfer; the bottom end of the second guide cylinder is provided with a second chamfer.

6. The high-efficiency molding machine with automatic sand dropping according to claim 3, characterized in that: The elastic energy storage member is a coil spring; the coil spring is arranged between the bottom end of the second guide cylinder and the corresponding guide hole; the minimum inner diameter of the coil spring is greater than or equal to the hole diameter of the guide hole.

7. The high-efficiency molding machine with automatic sand dropping according to claim 3, characterized in that: The driving groove comprises a plurality of vertical grooves and a plurality of spiral grooves; the plurality of vertical grooves and the plurality of spiral grooves are sequentially connected in a head-to-tail manner; the top end of the spiral groove is provided with a first blocking step for blocking the driving pin shaft from entering the vertical groove; the bottom end of the vertical groove is provided with a second blocking step for blocking the driving pin shaft from entering the spiral groove; the vertical groove is provided with a smooth transition slope.

8. The high-efficiency molding machine with automatic sand dropping according to claim 1, characterized in that: The inner wall of the first guide cylinder is uniformly distributed with unidirectional ratchet teeth in the circumferential direction; the outer wall of the second guide cylinder is uniformly distributed with unidirectional ratchet claws which are unidirectionally matched with the unidirectional ratchet teeth.

9. The high efficiency molding machine with automatic knockout as claimed in claim 1 wherein, The top end of the first guide cylinder extends an extension arm; the extension arm is provided with a locking hole; each corner position of the mold core is also vertically extended with a locking column; the locking column penetrates the locking hole.

10. The high-efficiency molding machine with automatic sand dropping according to claim 1, characterized in that: The sand box body is provided with a trapezoidal cavity and a rectangular cavity connected at the top end of the trapezoidal cavity.

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