Crucible-type semi-solid slurry preparation machine and semi-solid slurry preparation method

Abstract

The application discloses a kind of crucible type semi-solid slurry preparation pulper and semi-solid slurry preparation method, including crucible, frame, bottom tray, clamping mechanism, turnover mechanism and rotating mechanism;Turnover mechanism is installed on rotating mechanism, bottom tray and clamping mechanism are connected to turnover mechanism, and turnover mechanism can adjust the included angle between bottom tray and horizontal plane by rotation;Crucible is the tubular structure of two ends open, clamping mechanism can hold crucible on bottom tray, and bottom tray can close the bottom end opening of crucible;First state: turnover mechanism drives crucible to turn over towards front, so that the opening of crucible is inclined towards front, to realize feeding operation;Second state: turnover mechanism is adjusted to make the opening of crucible vertically upward, at this time, rotating mechanism operates, drives crucible to rotate on horizontal plane by driving turnover mechanism in turn;Third state: turnover mechanism drives crucible to turn over towards back, to realize discharging operation.

Description

TECHNICAL FIELD

[0001] The present application relates to a semi-solid die casting slurrying device, in particular to a crucible type semi-solid slurrying machine and a semi-solid slurrying method. BACKGROUND

[0002] Aluminum die casting semi-solid slurrying technology is a metal forming process between liquid and solid, which forms semi-solid slurry with non-dendritic structure by applying mechanical, physical or chemical action during metal solidification, and then obtains high-density and low-defect castings through die casting. This technology can significantly improve the mechanical properties of products, reduce porosity and shrinkage defects, reduce mold thermal shock, and prolong the service life of the mold. It has become an important development direction in the field of high-end aluminum die casting.

[0003] In related patents, patent CN221657937U discloses a semi-solid die casting rapid slurrying machine, which provides a slurrying device with continuous discharge function. The continuous receiving and container replacement of slurry are realized through the structure of supporting block, moving plate and bearing plate, and the discharge efficiency is improved.

[0004] Patent CN215746293U discloses a slurrying machine and a semi-solid metal slurry die casting system, which proposes a vacuum stirring type slurrying scheme. Through the cooperation of vacuum box, upper cover, box body and stirring device, slurry preparation is carried out in a vacuum environment to improve the uniformity and density of slurry organization.

[0005] Patent CN217252677U discloses a semi-solid slurrying machine and a semi-solid slurrying die casting system. In the disclosed method, raw material rods are used as stirring media. The stirring of the soup is realized through the clamping jaw, rotary driving part and displacement driving part, which avoids the wear problem of traditional stirring rods and improves the reliability and automation level of the equipment.

[0006] Patent CN106944599B discloses a slurrying machine for semi-solid slurrying and a semi-solid slurrying method. It provides a gas permeation type slurrying scheme. Inert gas is introduced into the slurry through the outer barrel with microporous structure to realize heat exchange and organization refinement. No mechanical stirring is required, which reduces energy consumption and equipment wear.

[0007] Although the existing technology has made various improvements in the structure of semi-solid slurrying equipment, stirring method, discharge efficiency and other aspects, there are still problems such as poor process continuity, insufficient uniformity of semi-solid slurry organization, and inaccurate temperature control, which affect the mechanical properties and yield of the final die casting, and the slurrying process and equipment integration capability need to be further optimized. SUMMARY

[0008] The technical problem solved by the present application is to provide a crucible type semi-solid slurry preparation machine and a semi-solid slurry preparation method, which have good process continuity and better quality of prepared semi-solid slurry.

[0009] The technical solution adopted by the present application to solve the above technical problem is: a crucible type semi-solid slurry preparation machine, comprising a crucible, a rack, and a bottom tray, a clamping mechanism, a turnover mechanism and a rotating mechanism integrated on the rack.

[0010] The turnover mechanism is installed on the rotating mechanism, and the bottom tray and the clamping mechanism are connected to the turnover mechanism, and the turnover mechanism can adjust the included angle between the bottom tray and the horizontal plane by rotation.

[0011] The crucible is a cylindrical structure with open ends, the clamping mechanism can hold the crucible on the bottom tray, and the bottom tray can close the open end of the crucible.

[0012] The bottom tray comprises a bottom wall and an annular side wall extending upward, and the annular side wall expands outward along the height direction.

[0013] The overall top view profile of the bottom tray is in the shape of a water droplet; one side of the circumferential profile of the annular side wall converges inward in a smooth arc line to form a protruding sharp part inward; except for the sharp part, the other positions of the annular side wall in the circumferential direction are outwardly convex arcs.

[0014] The slurry preparation machine has three working states:

[0015] The first state: the turnover mechanism drives the crucible to turn forward, so that the opening of the crucible is inclined forward to realize the feeding operation, and the top end of the sharp part is located at the low position of the bottom tray.

[0016] The second state: the turnover mechanism is adjusted to make the opening of the crucible vertically upward, at this time the rotating mechanism operates, drives the turnover mechanism and in turn drives the crucible to rotate on the horizontal plane.

[0017] The third state: the turnover mechanism drives the crucible to turn backward to realize the discharging operation.

[0018] The preferred technical solution adopted by the present application to solve the above technical problem is that the middle part of the bottom wall of the bottom tray is recessed inward to form a recessed part in the middle and an annular convex edge on the periphery.

[0019] The preferred technical solution adopted by the present application to solve the above technical problem is that the turnover mechanism comprises a servo motor, a speed reducer and a bracket driven by the servo motor, the bracket comprises two connecting arms, and the two sides of the bottom tray are fixedly connected with the connecting arms.

[0020] The preferred technical scheme adopted by the present application to solve the above technical problem is that an annular protruding rib is arranged on the outer peripheral wall of the crucible, and the clamping mechanism abuts against the annular protruding rib to tightly press the crucible against the bottom tray.

[0021] The preferred technical scheme adopted by the present application to solve the above technical problem is that the rotating mechanism comprises a rotating motor, an eccentric wheel, a first horizontal linear rail, a second horizontal linear rail, a fixed platform, a first movable platform and a second movable platform.

[0022] The eccentric wheel is eccentrically connected to the output end of the rotating motor, and is fixedly connected below the second movable platform; the first movable platform and the second movable platform are slidably connected through the second horizontal linear rail, and the first movable platform and the fixed platform are slidably connected through the first horizontal linear rail.

[0023] The preferred technical scheme adopted by the present application to solve the above technical problem is that the rack is a box structure, the rotating mechanism is arranged on the rack, and the rotating motor is arranged in a closed box body on the lower side of the rack.

[0024] The fixed platform is the upper plane of the closed box body, the eccentric wheel extends out of the closed box body, and the first horizontal linear rail, the second horizontal linear rail, the first movable platform and the second movable platform are located on the upper side of the closed box body; the rack is provided with a protective cover.

[0025] The preferred technical scheme adopted by the present application to solve the above technical problem is that the tip portion comprises an inclined drainage surface, the inclined drainage surface has a shape of being narrow at the front end and wide at the rear end, and the inclination angle of the inclined drainage surface ranges from 15 to 45 degrees.

[0026] The preferred technical scheme adopted by the present application to solve the above technical problem is that the clamping mechanism comprises two sets of pressing assemblies arranged on both sides of the bottom tray, and each pressing assembly comprises a cylinder, a transmission arm and a pressing arm.

[0027] The cylinder drives the pressing arm to press down through the transmission arm, and the front end of the pressing arm is provided with two spaced pressing fingers, which are respectively arranged on the two sides of the circumference of the crucible.

[0028] The preferred technical scheme adopted by the present application to solve the above technical problem is that the semi-solid pulping method of the crucible type semi-solid pulping pulper comprises the following steps:

[0029] Step one: the overturning mechanism overturns the bottom tray to a horizontal state;

[0030] Step two: the crucible is placed vertically on the bottom tray by the mechanical hand;

[0031] Step three: the clamping mechanism is activated to press the crucible on the bottom tray;

[0032] Step four: the turnover mechanism drives the bottom tray to turn forward, so that the opening of the crucible is inclined forward;

[0033] Step five: the aluminum liquid is poured into the crucible;

[0034] Step six: the turnover mechanism turns the bottom tray back to the horizontal state, so that the opening of the crucible is vertically upward; Step seven: the rotating mechanism is activated to drive the crucible to rotate on the horizontal plane, so that the aluminum liquid in the crucible is stirred;

[0035] Step eight: the aluminum liquid in the crucible gradually changes to a semi-solid state;

[0036] Step nine: the turnover mechanism drives the bottom tray to turn backward, so that the crucible is in a horizontal state and the opening is backward;

[0037] Step ten: the mechanical hand grabs the crucible while the clamping mechanism is relaxed, so that the crucible is taken off the bottom tray;

[0038] Step eleven: the pusher enters the opening at the bottom end of the crucible to push the semi-solid slurry in the crucible into the die casting machine pool.

[0039] Compared with the prior art, the device simulates and optimizes the physical process of semi-solid slurry preparation through the precise cooperation of two independent actions of turning and rotating. The forward inclination during pouring helps to reduce splashing and oxidation of inclusions; the vertical rotation during stirring utilizes the centrifugal force to move the heavier primary solid phase particles to the side wall of the crucible, while the molten liquid in the center part produces strong vortex and shear motion, effectively breaking the dendritic network into uniform and fine rose-shaped or spherical crystals, thereby obtaining high-quality semi-solid slurry. The backward inclination during discharging is suitable for automatic ejection and top material flow process.

[0040] In this scheme, the three functions of feeding, stirring and discharging are integrated into one device, and the whole process operation can be completed through program control, greatly improving the production efficiency and automation degree, and reducing manual intervention and uncertainty. Compared with the traditional mechanical stirring, the self-rotation of the vertical crucible realizes the rotary stirring, which avoids the pollution and air entrapment of the stirring paddle, and the shear action in the centrifugal field is more uniform and strong, which is more conducive to obtaining ideal semi-solid structure with fine and round grains. The three clear working states realized by the turnover mechanism are very convenient for debugging and integration with automatic feeding and discharging systems such as industrial robots and mechanical hands, laying a foundation for building a fully automatic semi-solid casting production line.

[0041] The pulping method is a complete process based on the above-mentioned equipment, which perfectly combines the functional state of the equipment with the process requirements through time sequence logic, forms an efficient, stable and repeatable standardized production process, realizes unmanned operation from molten metal to semi-solid slurry, and ensures the consistency and repeatability of the quality of each batch of slurry.

[0042] The setting of the pointed part can collect the leaked aluminum liquid there, and the collected aluminum liquid will drip or flow along the direction of the pointed part, instead of spreading irregularly. By this setting, the destructive and random aluminum liquid leakage is changed into predictable and controllable directional discharge, thereby completely avoiding its pollution and damage to the core moving parts below, which greatly improves the long-term operation reliability and service life of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0043] The application will be described in further detail below in conjunction with the drawings and preferred embodiments, but those skilled in the art will appreciate that the drawings are only drawn for the purpose of explaining the preferred embodiments and therefore should not be considered as limiting the scope of the application. In addition, unless specifically indicated, the drawings only schematically show the composition or structure of the described objects and can contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0044] Figure 1 Schematic diagram of a four-station crucible-type semi-solid pulping machine Figure 1 ;

[0045] Figure 2 Schematic diagram of a four-station crucible-type semi-solid pulping machine Figure 2 ;

[0046] Figure 3 Schematic diagram of a single station of a crucible-type semi-solid pulping machine

[0047] Figure 4 Schematic diagram of a single station of a crucible-type semi-solid pulping machine without protective cover

[0048] Figure 5 Schematic diagram of a single station of a crucible-type semi-solid pulping machine without front plate of closed box body

[0049] Figure 6 Exploded schematic diagram of a single station of a crucible-type semi-solid pulping machine Figure 1 ;

[0050] Figure 7 Exploded schematic diagram of a single station of a crucible-type semi-solid pulping machine Figure 2 ;

[0051] Figure 8A schematic view of a crucible and a bottom tray of a crucible type semi-solid slurry preparation machine.

[0052] Reference signs:

[0053] Crucible 1; annular convex rib 11; frame 2, closed box 21; bottom tray 3; bottom wall 31; annular side wall 32; tip 321; circular arc 322; recess 311; annular convex edge 312; inclined drainage surface 320; connecting lug 33; mounting portion 331; clamping mechanism 4; air cylinder 41; pressing arm 42; pressing finger 421; vertical wall 422; overturning mechanism 5; servo motor 51; reducer 52; bracket 53; connecting arm 531; rotating mechanism 6; rotating motor 61; eccentric wheel 62; first horizontal linear rail 63; second horizontal linear rail 64; fixed platform 65; first movable platform 66; second movable platform 67; convex portion 671; protective cover 7; top wall 71; rear wall 72; inclined front wall 73; support baffle 8; front baffle 9. DETAILED DESCRIPTION

[0054] The preferred embodiments of the present application will be described in detail below with reference to the attached drawings. It will be appreciated that the description is merely descriptive and exemplary, and should not be interpreted as limiting the scope of protection of the present application.

[0055] It should be noted that similar reference numerals refer to similar items throughout the accompanying drawings, and once an item is defined in one drawing, it will not be further defined and explained in subsequent drawings.

[0056] In the description of the present application, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, and are merely for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. The terms "first", "second" are merely for the convenience of understanding, and have no other directional meaning, and cannot be construed as limiting the present application.

[0057] As shown in Figures 1-7 The present embodiment provides a crucible type semi-solid slurry preparation machine, which comprises a crucible 1, a frame 2, and a bottom tray 3, a clamping mechanism 4, an overturning mechanism 5 and a rotating mechanism 6 integrated on the frame 2.

[0058] As shown in Figure 4As shown, the overturning mechanism 5 is installed on the rotating mechanism 6, the bottom tray 3 and the clamping mechanism 4 are connected to the overturning mechanism 5, and the overturning mechanism 5 can adjust the angle between the bottom tray 3 and the horizontal plane through rotation. The crucible 1 is a cylindrical structure with open ends, and the clamping mechanism 4 can press and hold the crucible 1 on the bottom tray 3, and the bottom tray 3 can close the bottom end opening of the crucible 1.

[0059] As shown, the pulper has three working states: Figures 1-2

[0060] The first state: the overturning mechanism 5 drives the crucible 1 to overturn forward, so that the opening of the crucible 1 is inclined forward, to realize the feeding operation.

[0061] The second state: the overturning mechanism 5 is adjusted to make the opening of the crucible 1 vertically upward, at this time the rotating mechanism 6 operates, and drives the crucible 1 to rotate on the horizontal plane by driving the overturning mechanism 5.

[0062] The third state: the overturning mechanism 5 drives the crucible 1 to overturn backward, to realize the discharging operation.

[0063] The function units of the bottom tray, clamping, overturning and rotating are integrated on the same rack 2, so that the crucible 1 can complete all processes of feeding, stirring and discharging in one time between three spatial postures.

[0064] The semi-solid pulping method of the crucible type semi-solid pulping pulper, comprising the following steps:

[0065] Step one: the overturning mechanism 5 overturns the bottom tray 3 to the horizontal state.

[0066] Step two: the crucible 1 is placed vertically on the bottom tray 3 by the mechanical arm.

[0067] Step three: the clamping mechanism 4 is started to press and hold the crucible 1 on the bottom tray 3, at this time the bottom tray 3 acts as the bottom of the crucible and closes the lower end opening.

[0068] Step four: the overturning mechanism 5 drives the bottom tray 3 to overturn forward, so that the opening of the crucible 1 is inclined forward, to facilitate the mechanical arm or manual pouring of the aluminum liquid.

[0069] Step five: the refined aluminum liquid is poured into the crucible 1.

[0070] Step six: the overturning mechanism 5 is returned to the normal position, the bottom tray 3 is overturned back to the horizontal state, the opening of the crucible 1 is vertically upward, and the crucible 1 remains in the vertical state for subsequent pulping operation.

[0071] Step seven: the rotating mechanism 6 is started and drives the crucible 1 to rotate on the horizontal plane to stir the aluminum liquid in the crucible 1.

[0072] ​Step eight: The melt is rapidly cooled to semi-solid temperature by vigorous stirring and strong heat exchange, and the aluminum liquid in the crucible 1 gradually transforms into semi-solid state.

[0073] Step nine: The bottom tray 3 is flipped forward by the flipping mechanism 5, and the crucible 1 is in a horizontal state with the opening facing backward, preparing for the subsequent crucible 1 removal and ingot ejection operation.

[0074] Step ten: The crucible 1 is taken off from the bottom tray 3 by the mechanical hand while the clamping mechanism 4 is relaxed.

[0075] Step eleven: The removed crucible 1 is adjusted to the discharging state, and the pushing piece of the discharging mechanism enters from the bottom end of the crucible 1 to push the semi-solid slurry in the crucible 1 into the die casting machine pool.

[0076] The device simulates and optimizes the physical process of semi-solid slurry preparation through the precise cooperation of two independent actions of flipping and rotating. The forward inclination during pouring helps to reduce splashing and oxidized slag inclusion; the vertical rotation during stirring utilizes centrifugal force to move the heavier primary solid phase particles to the side wall of the crucible 1, while the molten liquid in the center produces strong vortex and shear motion, effectively breaking the dendritic network and transforming it into uniform, fine rose-shaped or spherical crystals, thereby obtaining high-quality semi-solid slurry. The backward inclination during discharging is suitable for automatic crucible removal and ingot ejection process.

[0077] In this scheme, the three functions of feeding, stirring, and discharging are integrated into one device, and the whole process operation can be completed through program control, greatly improving production efficiency and automation level, reducing manual intervention and uncertainty. Compared with traditional mechanical stirring, the self-rotation of the vertical crucible 1 realizes rotational stirring, avoiding the pollution and air entrapment problems of the stirring paddle, and the shear action in the centrifugal field is more uniform and strong, which is more conducive to obtaining ideal semi-solid structure with fine grain size and high roundness. The three clear working states realized by the flipping mechanism 5 are very convenient for debugging and integration with automatic feeding and discharging systems such as industrial robots and mechanical hands, laying a foundation for building a fully automatic semi-solid casting production line.

[0078] The slurry preparation method is a complete process based on the above-mentioned device, including eleven specific steps, perfectly combining the functional state of the device with the process requirements through time sequence logic, forming an efficient, stable, and repeatable standardized production process, realizing unmanned operation from molten metal to semi-solid slurry, and ensuring the consistency and repeatability of the quality of each batch of slurry.

[0079] As Figure 3 , 4As shown in Figure 8, the base tray 3 includes a bottom wall 31 and an upwardly extending annular sidewall 32, which expands outward along the height direction. The overall top view of the base tray 3 is teardrop-shaped. In the circumferential profile of the annular sidewall 32, one side converges inward with a smooth arc to form an inwardly protruding tip 321. Except for the tip 321, the other circumferential positions of the annular sidewall 32 are all outwardly protruding arcs 322. In the first state, the top of the tip 321 is located at the lower position of the base tray 3.

[0080] It should be understood that in the first state, the bottom tray 3 and the crucible 1 are tilted. Since the crucible 1 is held on the bottom tray 3 from above by the clamping mechanism 4, and the two are not welded or bolted together, there is a possibility of local micro-gaps due to processing errors, thermal deformation, or foreign objects. High-temperature molten aluminum has excellent fluidity. Once a gap exists, the molten aluminum will rapidly seep out under gravity. If the seeping molten aluminum flows everywhere, it will solidify on the surface of the bottom tray and may also splash onto critical moving parts such as the rotating mechanism 6 and the tilting mechanism 5, causing equipment jamming, component damage, or even serious safety accidents. The tip 321 can collect the leaked molten aluminum at this point. Furthermore, the top of the tip 321 is located at the lowest point of the entire bottom tray 3. Based on the property that liquids always flow downhill, any molten aluminum seeping from the gap between the crucible 1 and the bottom tray 3 will naturally flow along the wall of the bottom tray 3 towards the lowest point under the influence of gravity. The collected molten aluminum will then drip or flow out in the direction of this tip, rather than spreading randomly. This design transforms destructive, random molten aluminum leakage into predictable and controllable directional discharge, completely avoiding contamination and damage to the core moving parts below. This significantly improves the long-term operational reliability and service life of the equipment.

[0081] like Figure 8 As shown, the bottom wall 31 of the bottom tray 3 is recessed inward in the middle, forming a central recess 311 and an outer annular protrusion 312. The inner diameter of the recess 311 is adapted to the outer diameter of the cylindrical crucible 1.

[0082] In step two, crucible 1 is inserted into the recess 311. The annular protrusion 312 provides a certain positioning effect on the bottom of crucible 1, while also enhancing the sealing effect of the bottom tray 3 on the bottom of crucible 1, reducing the probability of initial aluminum melt overflow. Simultaneously, this recessed design increases the contact surface area between the bottom tray 3 and the slurry, accelerating the cooling rate of the bottom slurry, which is beneficial for obtaining finer microstructures and forming a less flowable bottom slurry in a shorter time, preventing aluminum melt overflow during subsequent stirring. Furthermore, this concave-convex design acts like a reinforcing rib, improving the bottom tray 3's resistance to deformation under high temperature and heavy load, ensuring long-term reliability.

[0083] like Figure 4 ,8 As shown, the tip 321 includes an inclined guide surface 320, the inclination angle of which ranges from 15° to 45°. The inclined guide surface 320 has a shape that is narrow at the front end and wide at the rear end. This pre-designed inclined surface ensures that the molten aluminum can flow out smoothly at an appropriate speed, avoiding accumulation and solidification at the tip 321 that could cause blockage, thus ensuring the long-term effectiveness of the guide channel. By optimizing the inclination angle to provide sufficient flow driving force and by accelerating the outflow through shape design, it is ensured that the molten aluminum is discharged before solidification. This fundamentally solves the risk of the guide channel itself being blocked by solidified metal, ensuring the long-term effectiveness and reliability of this safety function.

[0084] like Figure 8 As shown, an annular rib 11 is pre-cast or machined on the outer peripheral wall of the crucible 1. The clamping end of the clamping mechanism 4 does not press directly against the opening of the crucible 1, but rather abuts against this annular rib 11. By pressing the annular rib 11 downwards, a force is generated that presses the crucible 1 firmly against the bottom tray 3, achieving a seal. This arrangement avoids the clamping force acting directly on the weak, open edge of the crucible 1, preventing deformation or damage due to stress concentration and extending the service life of the crucible 1.

[0085] Preferably, the annular rib 11 is disposed in the lower section of the crucible 1, and the distance between the lower surface of the annular rib 11 and the bottom surface of the crucible 1 is slightly greater than the height of the recess 311. The annular rib 11 is a circumferentially continuous, thickened cross-section reinforcing structure, providing a robust, stable, and pressure-bearing platform for the clamping mechanism 4. The clamping force acts on the lower section of the crucible 1, and the force transmission is more direct, ensuring the seal between the bottom of the crucible 1 and the bottom tray 3, preventing aluminum leakage. The distance between the lower surface of the annular rib 11 and the bottom surface of the crucible 1 is slightly greater than the height of the recess 311, so that the lower end of the crucible 1 can be confined within the recess 311, and the annular rib 11 can cover the gap between the lower end of the crucible 1 and the annular convex edge 312 of the bottom tray 3, further improving stability and sealing.

[0086] like Figure 7 As shown, the tilting mechanism 5 includes a servo motor 51, a reducer 52, and a support 53 driven by the servo motor 51. The support 53 includes two connecting arms 531, with the bottom tray 3 fixedly connected to the connecting arms 531 on both sides. The servo motor 51 provides precise angular displacement and torque control, and the reducer 52 amplifies the torque to smoothly support and drive the fully loaded crucible 1. The two-point support structure of the double connecting arms 531 ensures that the bottom tray 3 and the crucible 1 are subjected to uniform force, have good rigidity, and operate stably during tilting and rotation.

[0087] like Figure 8As shown, the two sides of the bottom tray 3 are provided with connecting ears 33, the outer end faces of the connecting ears 33 are provided with mounting portions 331, and the clamping mechanism 4 is fixed on the mounting portions 331.

[0088] It should be noted that, as Figure 8 shown, the connecting ears 33, the support 53 and the bottom tray 3 body are integrally formed. The bottom tray 3 and the connecting ears 33 are integrally cast from the same material. In operation, they are heated and expanded at the same time and at the same rate. This ensures that the relative positional relationship between the clamping mechanism 4 mounting portion and the bottom tray 3 sealing surface remains unchanged regardless of temperature changes, completely avoiding the relaxation of clamping force or sealing failure caused by uneven thermal expansion.

[0089] As shown in Figures 3-4 , the clamping mechanism 4 includes two sets of pressing assemblies on both sides of the bottom tray 3, and the pressing assemblies include air cylinders 41, transmission arms and pressing arms 42. The air cylinders 41 drive the pressing arms 42 to press down through the transmission arms, and the front ends of the pressing arms 42 are provided with two spaced pressing fingers 421, which are located on the opposite sides of the crucible 1 in the circumferential direction. The air cylinders 41 provide power, and through the leverage of the transmission arms, the force is amplified, and finally two pressing fingers 421 realize precise and stable pressing. In this embodiment, the two pressing arms 42 are located on both sides of the crucible 1 in the first direction, and the two pressing fingers 421 of one pressing arm 42 are located on both sides of the crucible 1 in the second direction; double-sided four-point clamping ensures that the crucible 1 is evenly stressed in the circumferential direction, avoiding sealing failure or damage to the crucible 1 caused by unilateral stress.

[0090] As shown in Figures 3-4 , the air cylinder 41 of the clamping mechanism 4 is a rotary air cylinder, and the transmission arm is driven to rotate by the air cylinder 41 to drive the pressing arm 42 to swing up and down around it. The pressing arm 42 includes two parallel supporting arms connected with the transmission arm and a vertical wall 422 connecting the two supporting arms, and the lower end of the vertical wall 422 extends outward to form a pressing finger 421.

[0091] As shown in Figure 6 , the rotating mechanism 6 includes a rotating motor 61, an eccentric wheel 62, a first horizontal linear rail 63, a second horizontal linear rail 64, a fixed platform 65, a first movable platform 66 and a second movable platform 67. The first horizontal linear rail 63 and the second horizontal linear rail 64 are perpendicular to each other. The eccentric wheel 62 is eccentrically connected to the output end of the rotating motor 61, and the eccentric wheel 62 is fixedly connected below the second movable platform 67. The first movable platform 66 and the second movable platform 67 are slidably connected through the second horizontal linear rail 64, and the first movable platform 66 and the fixed platform 65 are slidably connected through the first horizontal linear rail 63. The first movable platform 66 is a hollow back-shaped frame structure.

[0092] The rotating mechanism 6 drives an eccentric wheel 62 by a rotating motor 61. The eccentric wheel 62 drives a second moving platform 67, which is connected to a first moving platform 66 through a second horizontal linear rail 64, and moves in one dimension Y direction. The first moving platform 66 is connected to a fixed platform 65 through a first horizontal linear rail 63, and moves in another dimension X direction. When the rotating motor 61 rotates at a constant speed, the eccentric wheel 62 performs a circular motion. This circular motion can be decomposed into sine motion in X and Y directions, and through the transmission of two-stage moving platforms and linear rails, finally drives the overturning mechanism 5 and the crucible 1 on it to form a planar and circular motion track, that is, to realize rotation in the horizontal plane. Compared with the traditional rotating shaft structure, this circular motion through double sliding rails can eliminate the huge centrifugal inertia force generated by the high-speed rotation of the eccentric mass, and the operation is very stable, with minimal noise and vibration, which is friendly to the equipment foundation and surrounding equipment.

[0093] As shown in Figures 5-7 , the rack 2 is a box structure, the rotating mechanism 6 is arranged on the rack 2, and the rotating motor 61 is arranged in a closed box 21 on the lower side of the rack 2. The entire rotating motor 61 is installed in the closed box 21 on the lower part of the rack 2. The fixed platform 65 is the upper plane of the closed box 21, the eccentric wheel 62 extends out of the closed box 21, the first horizontal linear rail 63, the second horizontal linear rail 64, the first moving platform 66 and the second moving platform 67 are located on the upper side of the closed box 21. The entire driving mechanism is hidden below the second moving platform 67, realizing the separation of the power unit and the working unit, easy to maintain and clean. And the lower structure can protect the motor from the influence of dust and high temperature on site.

[0094] As shown in Figures 1-2 , multiple stations are integrated, and each station is integrated with a bottom tray 3, a clamping mechanism 4, an overturning mechanism 5 and a rotating mechanism 6. The clamping mechanism 4, the overturning mechanism 5 and the rotating mechanism 6 of each station are operated independently. Each station is provided with a separate protective cover 7 to shield the rotating mechanism 6.

[0095] Preferably, as shown in Figure 4 , 6As shown in FIG. 7, the turnover mechanism 5 is fixed on the front side of the second moving platform 67, and each station is provided with a support stop bar 8 on the left and right sides, and the height of the support stop bar 8 exceeds the second moving platform 67. The front side of the station is provided with a front baffle 9 below the second moving platform 67. The front end of the second moving platform 67 is provided with a protruding part 671 protruding forward, and the turnover mechanism 5 is fixed on the protruding part 671. The protruding part 671 is provided with a gap on both sides. The protective cover 7 includes a top wall 71, a rear wall 72 and two separate inclined front walls 73. The top wall is supported by the support stop bar above the support stop bar, and the rear wall 72 is bent downward to the rear side of the support stop bar 8. The space between the two inclined front walls 73 avoids the protruding part 671. The inclined front wall 73 is downwardly inclined from back to front and abuts the front baffle 9, so as to enclose the whole rotating mechanism 6 in the space surrounded by the front baffle, the support stop bar and the front baffle.

[0096] The present application provides a kind of crucible type semi-solid slurry preparation for slurry preparation machine and semi-solid slurry preparation method, the principle and implementation mode of the present application are described in this paper by applying specific examples, the above embodiment is only used to help understand the present application and core idea.It should be pointed out that for ordinary skilled person in the art, without departing from the principle of the present application, the present application can also be improved and modified, these improvements and modifications also fall within the scope of protection of the present application claims.

Claims

1. A crucible type semi-solid slurry preparation machine, characterized in that: it comprises a crucible, a frame, and a bottom tray, a clamping mechanism, a turnover mechanism and a rotating mechanism integrated on the frame; the turnover mechanism is installed on the rotating mechanism, and the bottom tray and the clamping mechanism are both connected to the turnover mechanism; the turnover mechanism can adjust the included angle between the bottom tray and the horizontal plane by rotating; the crucible is a cylindrical structure with open ends; the clamping mechanism can press the crucible on the bottom tray, and the bottom tray can close the open end of the crucible; the bottom tray comprises a bottom wall and an annular side wall extending upward, and the annular side wall expands outward along the height direction; the overall top view profile of the bottom tray is in the shape of a water droplet; the circumferential profile of the annular side wall is inwardly convergent on one side in a smooth arc line to form a protruding sharp part inwardly; except for the sharp part, the circumferential profile of the annular side wall is outwardly convex in a circular arc; the slurry preparation machine has three working states: in the first state, the turnover mechanism drives the crucible to turn forward, so that the opening of the crucible is inclined forward to realize the feeding operation, and the top end of the sharp part is located at the low position of the bottom tray; in the second state, the turnover mechanism is adjusted to make the opening of the crucible vertical upward, and at this time, the rotating mechanism operates to drive the turnover mechanism and then drive the crucible to rotate on the horizontal plane; in the third state, the turnover mechanism drives the crucible to turn backward to realize the discharging operation.

2. The crucible type semi-solid slurry preparation machine according to claim 1, characterized in that: the middle part of the bottom wall of the bottom tray is inwardly recessed to form a recessed part in the middle and an annular raised edge on the periphery.

3. The crucible type semi-solid slurry preparation machine according to claim 1, characterized in that: the turnover mechanism comprises a servo motor, a speed reducer and a bracket driven by the servo motor, the bracket comprises two connecting arms, and the two sides of the bottom tray are fixedly connected to the connecting arms, respectively.

4. The crucible type semi-solid slurry preparation machine according to claim 1, characterized in that: an annular rib is arranged on the outer peripheral wall of the crucible, and the clamping mechanism abuts against the annular rib to tightly press the crucible on the bottom tray.

5. The crucible type semi-solid slurry preparation machine according to claim 1, characterized in that: the rotating mechanism comprises a rotating motor, an eccentric wheel, a first horizontal linear rail, a second horizontal linear rail, a fixed platform, a first movable platform and a second movable platform; the first horizontal linear rail and the second horizontal linear rail are perpendicular to each other; the eccentric wheel is eccentrically connected to the output end of the rotating motor, and the eccentric wheel is fixedly connected below the second movable platform; the first movable platform and the second movable platform are slidingly connected through the second horizontal linear rail, and the first movable platform and the fixed platform are slidingly connected through the first horizontal linear rail; the frame is a box type structure, the rotating mechanism is arranged on the frame, and the rotating motor is arranged in a closed box body on the lower side of the frame. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 6. The crucible-type semi-solid slurry preparation machine according to claim 5, characterized by: ​ The fixed platform is an upper plane of the closed box body, the eccentric wheel extends out of the closed box body, the first horizontal linear rail, the second horizontal linear rail, the first movable platform and the second movable platform are located on the upper side of the closed box body, and the rack is provided with a protective cover.

7. The crucible-type semi-solid paste maker according to claim 1, characterized by: The tip portion comprises an inclined drainage surface, the inclined drainage surface is narrow at the front end and wide at the rear end, and the inclination angle of the inclined drainage surface ranges from 15 to 45 degrees.

8. The crucible-type semi-solid slurry preparation machine according to claim 1, characterized by: The clamping mechanism comprises two sets of pressing assemblies on both sides of the bottom tray, the pressing assembly comprises a gas cylinder, a transmission arm and a pressing arm. The gas cylinder drives the pressing arm to press down through the transmission arm, the front end of the pressing arm is provided with two spaced pressing fingers, and the pressing fingers are located on both sides of the circumference of the crucible.

9. The semi-solid pulping method of a crucible-type semi-solid pulper according to any one of claims 1 to 8, characterized by The method comprises the following steps: Step one: the overturning mechanism overturns the bottom tray to a horizontal state; Step two: the mechanical hand vertically places the crucible on the bottom tray; Step three: the clamping mechanism is started to press and hold the crucible on the bottom tray; Step four: the overturning mechanism drives the bottom tray to overturn forward, so that the opening of the crucible is inclined forward; Step five: the aluminum liquid is poured into the crucible; Step six: the overturning mechanism overturns the bottom tray back to the horizontal state, so that the opening of the crucible is vertically upward; Step seven: the rotating mechanism is started and drives the crucible to rotate on the horizontal plane, so as to stir the aluminum liquid in the crucible; Step eight: the aluminum liquid in the crucible gradually changes to a semi-solid state; Step nine: the overturning mechanism drives the bottom tray to overturn backward, so that the crucible is in a horizontal state and the opening is backward; Step ten: the mechanical hand grabs the crucible, and the clamping mechanism is relaxed, so as to take the crucible off the bottom tray; Step eleven: the pushing member enters the bottom end opening of the crucible, and pushes the semi-solid slurry in the crucible into the die casting machine pool.

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