Recycling machine for casting
By installing a vibration component on the stirring shaft, the problem of blade adhesion in the stirring chamber of traditional regenerators is solved, achieving efficient self-cleaning and improving production efficiency and safety.
Patent Information
- Application Number
- CN202520614742.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-02
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-04-02
AI Technical Summary
When traditional regenerators process molding sand containing resin binders, the fixed metal blades inside the mixing chamber are prone to adhesion, which leads to a decrease in friction peeling efficiency, increases energy consumption and maintenance frequency, and affects production continuity.
A vibration component is installed on the stirring shaft, which generates vibration through an eccentric wheel or an electromagnetic vibration unit. The vibration generated by the eccentric wheel or electromagnetic vibration unit breaks down the adhesion of impurities. Through the dynamic coordination design between the vibration shaft and the stirring shaft, efficient self-cleaning is achieved.
It significantly improves the self-cleaning ability of the mixing chamber, avoids cleaning dead corners, improves production efficiency, and reduces energy consumption and safety hazards.
Smart Images
Figure CN223946756U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a resource recycling equipment, especially a regenerating machine for casting. BACKGROUND
[0002] In the casting production process, the waste molding sand produced by sand casting needs to be recycled by regeneration treatment, and the regenerating machine is the core equipment of the sand treatment system and is mainly applied to the old sand recycling section of the casting workshop. The existing regenerating machine usually adopts mechanical stirring regeneration, and its working process includes four modules of crushing, screening, magnetic separation and regeneration: after the waste molding sand is preliminarily crushed by the crushing roller, the large particle impurities are removed by the vibrating screen, and then the metal scraps are separated by the magnetic separation device, and finally the sand particles are subjected to friction stripping treatment by the metal blades rotating at high speed in the stirring bin to remove the binder and inert film remaining on the surface of the sand particles. The equipment can make the regenerated sand approach the process performance of new sand through multi-stage treatment, and is widely used in large-scale casting enterprises such as cast iron and cast steel, which significantly reduces the cost of sand use.
[0003] However, the traditional regenerating machine has significant technical bottlenecks in actual application. The fixed metal blades arranged in the stirring bin are prone to sand adhesion during long-term operation, especially when processing molding sand containing resin binder. The binder residues will repeatedly stick to the surface of the blades under the action of high temperature, forming a hardened layer. As the thickness of the adhesion layer increases, the effective contact area between the blades and the sand particles decreases, resulting in a decrease in friction stripping efficiency, forcing the equipment to frequently stop for manual cleaning. This not only increases energy consumption, but also seriously restricts the continuous operation capacity of the production line due to the long maintenance period each time, and the narrow space inside the bin body brings safety hazards to the cleaning operation, which is a key problem restricting the comprehensive performance improvement of the regenerating machine. UTILITY MODEL CONTENTS
[0004] In view of the deficiencies of the prior art, the utility model provides a regenerating machine for casting which can clean the stirring blades in the stirring bin.
[0005] To achieve the above purpose, the technical scheme of the utility model is as follows: a regenerating machine for casting, comprising a stirring bin, a plurality of groups of rotatable stirring mechanisms are arranged in the stirring bin, the stirring mechanism comprises a stirring shaft driven to rotate by a driving motor, a plurality of stirring blades are arranged on the outer circumferential surface of the stirring shaft in a circumferential direction, and a vibrating assembly is further included, the vibrating assembly makes the stirring shaft vibrate during rotation to shake off the impurities adhered thereto.
[0006] The utility model discloses beneficial effect is: through the setting of vibration subassembly, synchronous mechanical vibration is produced in the stirring shaft rotation process, effectively destroys the adhesion state of impurity on the stirring shaft surface, significantly promotes self -cleaning ability. The vibration effect can cover the circumferential all area of stirring shaft, avoids the clean dead angle problem of traditional fixed scraper. As a preferred mode, vibration subassembly can adopt eccentric wheel structure, and the eccentric wheel is produced centrifugal vibration through the stirring shaft rotation, and this structure can realize periodic vibration excitation without additional power source;Or adopt electromagnetic drive module, set adjustable frequency electromagnetic vibration unit at the specific position of stirring shaft, and the mechanical resonance is caused through the magnetic field change, thereby adapting the cleaning demand of different viscosity material.
[0007] Further, the stirring shaft center is provided with a placing cavity, the vibration subassembly includes a vibration shaft which is arranged in the placing cavity through clearance fit, the vibration shaft includes a circumferential part and a protruding part, the inner diameter surface of the stirring shaft is provided with a vibration part matched with the protruding part, and the radial distance between the protruding part and the vibration part is greater than the radial distance between the placing cavity and the vibration shaft.
[0008] Through the dynamic cooperation design of the vibration shaft and the stirring shaft, impact vibration is generated by the periodic collision of the protruding part and the vibration part during rotation, which not only guarantees the strength requirement of the stirring shaft, but also realizes efficient vibration conduction. The built-in structure avoids the sealing problem caused by the external vibrator, and is especially suitable for humid or dusty environments. As a preferred mode, the protruding part can adopt an asymmetric distribution design, for example, three groups of trapezoidal protrusions with an interval of 120° are arranged on the circumference of the vibration shaft, and are matched with the corresponding arc-shaped grooves on the inner wall of the stirring shaft to generate multidirectional vibration waves through staggered collision;Or a involute type protruding structure is adopted, so that the collision contact surface automatically adjusts with the change of rotating speed, forming continuous vibration waves at high speed, and keeping intermittent strong impact at low speed.
[0009] Further, the vibration subassembly further includes a striking hole arranged on the stirring shaft and a thimble arranged in the striking hole, after the stirring shaft is vibrated by the cooperation of the protruding part and the vibration part, the thimble strikes the side wall of the striking hole to make the stirring shaft vibrate.
[0010] The cooperation of the thimble and the striking hole forms a secondary vibration amplification mechanism, and through multi-stage transmission of impact energy, the vibration intensity and frequency response range are significantly improved. The structure is especially suitable for processing high-adhesion impurities, and the stubborn adherents are stripped through high-frequency micro-amplitude vibration. As a preferred mode, the striking hole can be designed as a tapered flared structure, and a hemispherical impact head is arranged at the end of the thimble, when the thimble is excited to vibrate, the movement track of the thimble is guided to form a spiral impact path by the tapered hole wall, and a three-dimensional vibration field is generated;Or an elastic damping layer is arranged in the middle segment of the thimble, and the effective vibration duration is prolonged through the transmission and conversion of impact energy between the rigid segment and the elastic segment.
[0011] Furthermore, the impact hole has an elliptical cross-section and its outer diameter gradually decreases towards the outer surface of the stirring shaft. The outer diameter of the end of the ejector pin facing the inner side of the impact hole is smaller than the outer diameter of the impact hole. The vibration assembly also includes a swing rod disposed in the impact hole and passing through the ejector pin to make the upper and lower ends of the ejector pin swing, and springs disposed in the impact hole and respectively fixed on both sides below the ejector pin.
[0012] The synergistic effect of the elliptical tapering impact hole, the swing rod, and the spring enables controlled oscillation of the ejector pin and a mechanism for energy storage and release. This design allows for the pulsed release of vibrational energy, generating high-intensity instantaneous impacts while avoiding structural fatigue caused by continuous vibration. As a preferred approach, the swing rod can employ a two-degree-of-freedom hinged structure, with a ball joint at the upper part of the ejector pin and a butterfly spring assembly at the lower part. When the ejector pin deviates from its central position due to impact, the ball joint allows the ejector pin to deflect in multiple directions, while the butterfly spring provides nonlinear restoring force, forming a composite vibration mode. Alternatively, spring assemblies of different stiffnesses can be placed on both sides of the ejector pin, generating rotational torque through asymmetric elastic restoring, causing the ejector pin to simultaneously rotate during oscillation.
[0013] Furthermore, the ejector pin, impact hole, swing rod, and spring are arranged in several groups, and are respectively located on the same radial extension line as the stirring blades arranged on the outer circumferential surface of the stirring shaft.
[0014] This layout design achieves precise alignment between the vibration source and the stirring blades, allowing vibration energy to directly act on the root region of the blades where impurities are most heavily deposited. Through the synergistic effect of vibration and stirring, self-cleaning is simultaneously completed during material mixing, significantly improving operational efficiency. As a preferred approach, each vibration unit can be configured with an independent tuning mechanism. For example, an adjustable counterweight can be installed at the end of the spring assembly to adjust the vibration frequency according to the length difference of the corresponding stirring blades; or a heat conduction channel can be set between the ejector pin and the stirring blades, utilizing the frictional heat generated during stirring to cause the ejector pin to expand and displace, achieving adaptive adjustment of vibration parameters. Attached Figure Description
[0015] Fig. 1 This is a cross-sectional structural diagram of the vibration assembly according to an embodiment of the present invention;
[0016] Fig. 2 This is a partial enlarged view of the impact hole in an embodiment of the present invention;
[0017] Fig. 3 This is an internal view of an embodiment of the present utility model; Detailed Implementation
[0018] This utility model embodiment provides a casting recycling machine, such as... Figs. 1-3As shown: including stirring bin 2, several groups of rotatable stirring mechanism 3 are installed inside stirring bin 2. Stirring mechanism 3 contains stirring shaft 31 driven by driving motor (not shown in the figure), the outer surface of stirring shaft 31 is uniformly distributed with a plurality of stirring blades 32 in the circumference. It also includes vibration assembly 5, which can make stirring shaft 31 vibrate during rotation.
[0019] Cylindrical placement cavity 33 at the shaft center of stirring shaft 31. The vibration shaft 52 is installed in the clearance fit in the placement cavity 33, which has a smooth circumferential part 521 and an outwardly protruding protruding part 522. The vibration part 331 is provided at the corresponding position of the inner wall of the stirring shaft 31, and the radial clearance sum of the protruding part 522 is greater than the assembly clearance of the vibration shaft 52 and the placement cavity 33. When the stirring shaft 31 rotates, the protruding part 522 will periodically collide with the vibration part 331 to induce vibration.
[0020] In order to strengthen the vibration effect, a plurality of elliptical impact holes 53 are formed on the stirring shaft 31. Each impact hole 53 movably installs a thimble 54, and the inner end diameter of the thimble 54 is smaller than the inner diameter of the impact hole 53. When the vibration shaft 52 induces the vibration of the stirring shaft 31, the thimble 54 will impact the side wall 531 of the impact hole 53 under the action of inertia to generate secondary vibration wave. The specially designed impact hole 53 has an elliptical cross section and gradually shrinks towards the outer end, which can guide the vibration direction of the thimble 54.
[0021] The springs 55 are provided on both sides below the thimble 54, which can absorb part of the impact energy by elastic deformation. The swing rod 56 is installed through the thimble 54, which cooperates with the tapered impact hole 53 to make the thimble 54 produce swing effect when vibrating. Each group of impact holes 53, thimbles 54, springs 55 and swing rods 56 are in the same radial plane with the corresponding stirring blades 32, which ensures that the vibration energy can be effectively transmitted to the stirring blades 32.
[0022] The working principle is as follows: when the driving motor (not shown in the figure) drives the stirring shaft 31 to rotate, the protruding part 522 of the vibration shaft 52 periodically collides with the vibration part 331 to generate primary vibration. When the vibration is transmitted to the impact hole 53, the thimble 54 impacts the side wall 531 under the action of inertia to form secondary vibration. The cooperation of the swing rod 56 and the tapered hole wall makes the thimble 54 swing, and the elastic action of the spring 55 assists the vibration reset. The radial correspondence of the plurality of vibration units and the stirring blades 32 makes the impurities attached to the stirring blades 32 be effectively shaken off under the combined vibration action.
[0023] The above embodiment is only one of the preferred specific embodiments of the present application, and the usual changes and replacements made by those skilled in the art within the technical scheme of the present application are all included in the protection scope of the present application.
Claims
1. A recycler for foundry use, comprising a mixing bin in which a plurality of sets of rotatable mixing mechanisms are provided, characterized in that: The stirring mechanism comprises a stirring shaft driven to rotate by a driving motor, a plurality of stirring blades are arranged on the outer circumferential surface of the stirring shaft in a circumferential direction, and a vibration assembly is arranged to vibrate the stirring shaft during rotation to shake off impurities adhered to the stirring shaft.
2. The reclaimer for casting according to claim 1, characterized in that: The stirring shaft is provided with a placement cavity at the center thereof, the vibration assembly comprises a vibration shaft arranged in the placement cavity in a clearance fit, the vibration shaft comprises a circumferential portion and a protruding portion, the inner diameter surface of the stirring shaft is provided with a vibration portion matched with the protruding portion, and the radial distance between the protruding portion and the vibration portion is greater than the radial distance between the placement cavity and the vibration shaft.
3. The reclaimer for casting according to claim 2, characterized in that: The vibration assembly further comprises a percussion hole arranged on the stirring shaft and a plunger arranged in the percussion hole, the plunger is arranged to strike the side wall of the percussion hole to vibrate the stirring shaft after the protruding portion and the vibration portion are matched to vibrate the stirring shaft.
4. The reclaimer for casting according to claim 3, characterized in that: The cross section of the percussion hole is arranged in an elliptical shape, and the outer diameter of the percussion hole gradually decreases towards the outer surface of the stirring shaft, the outer diameter of the plunger at one end inside the percussion hole is smaller than the outer diameter of the percussion hole, the vibration assembly further comprises a swing rod arranged in the percussion hole and penetrating the plunger to swing the upper and lower ends of the plunger, and springs arranged in the percussion hole and fixed below the plunger on both sides.
5. The casting reclaimer of claim 4, wherein: The plunger, the percussion hole, the swing rod and the springs are arranged in a plurality of groups, and are arranged on the same radial extension line with the stirring blades arranged on the outer circumferential surface of the stirring shaft.