High-speed horizontal dephasing molding machine for casting

Abstract

The invention discloses a high-speed horizontal dephasing molding machine for casting, and relates to the technical field of molding machines of sand molds for casting, the high-speed horizontal dephasing molding machine for casting comprises a lower pressing mold used for bearing a bottom molding of the sand mold, and a sand box arranged above the lower pressing mold and used for containing molding sand to form the sand mold. Through cooperation of a rotary connecting rod structure and a shifting rod structure, multi-angle rotary paving can be achieved under driving of a motor source, molding sand can be quickly and evenly paved in combination with high-frequency vibration of an ultrasonic generator, meanwhile, the molding sand is pre-tightened, the initial density uniformity of the molding sand is improved, a solid foundation is laid for follow-up precise compaction, and the production efficiency is improved. Besides, according to sand molds with different depths, the inclination angle of the rotating connecting rod structure can be adjusted through the rotating shaft column, precise and uniform distribution of three-dimensional space molding sand is achieved in cooperation with intelligent adjustment of the extension plate, the filling rate of the deep cavity part is improved, and the problem that molding sand is seriously accumulated in the deep cavity, a boss and other areas in the traditional technology is effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of molding machines for casting sand molds, and particularly to a high-speed horizontal stripping and demolding molding machine for casting. Background Art

[0002] Sand casting is a casting method for producing castings in sand molds. Castings of steel, iron, and most non-ferrous alloys can be obtained by sand casting. Since the molding materials used in sand casting are inexpensive and easily available, and the mold manufacturing is simple, it can adapt to single-piece production, batch production, and mass production of castings. For a long time, it has been the basic process in casting production.

[0003] Currently, when the molding sand is injected into the sand box from the sand shooting tank in a conventional molding machine, the molding sand often concentrates near the sand inlet of the sand box, resulting in a hill-shaped accumulation of the molding sand in the sand box, with obvious thickness differences. In the casting of some complex sand molds, this uneven distribution of the molding sand is more prominent. In the subsequent compaction process, the thicker areas bear greater pressure, while the thinner areas have insufficient pressure, ultimately leading to uneven compaction degrees of each part of the molding sand and seriously affecting the quality of the castings. Therefore, it is necessary to propose a high-speed horizontal stripping and demolding molding machine for casting. Summary of the Invention

[0004] The purpose of the present invention is to provide a high-speed horizontal stripping and demolding molding machine for casting, so as to solve the problem proposed in the above background art that when the molding sand is injected into the sand box from the sand shooting tank in a conventional molding machine, the molding sand often concentrates near the sand inlet of the sand box, resulting in a hill-shaped accumulation of the molding sand in the sand box, with obvious thickness differences. In the casting of some complex sand molds, this uneven distribution of the molding sand is more prominent. In the subsequent compaction process, the thicker areas bear greater pressure, while the thinner areas have insufficient pressure, ultimately leading to uneven compaction degrees of each part of the molding sand and seriously affecting the quality of the castings.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A high-speed horizontal stripping and demolding molding machine for casting, including a lower pressing mold for supporting the bottom forming of the sand mold; A sand box is arranged above the lower pressing mold and is used for accommodating the molding sand to form a sand mold; An upper pressing mold is arranged above the sand box and is used for compacting and forming the molding sand in the sand box; A translational model assembly, which includes a model magnetic connection end and a first driving device for driving the model magnetic connection end to translate between the upper pressing mold and the lower pressing mold. A model plate is arranged on the template surface of the lower pressing mold, and the model magnetic connection end is used for magnetic connection with the side end of the model plate that is slidably connected inside the sand box; The lever-type molding sand even distribution structure includes a rotating connecting rod structure arranged inside the sand box, a lever structure connected to the rotating connecting rod structure, and a motor source for driving the rotation of the rotating connecting rod structure. When the motor source drives the rotation of the rotating connecting rod structure, the lever structure rotates in the sand box to evenly spread the molding sand in the sand box.

[0006] Preferably, a vertical short lead screw guide rail is installed at the side end of the rotating connecting rod structure, a bevel gear structure is installed at the output end of the motor source, the output end of the bevel gear structure is connected with a rotating shaft column, the outside of the rotating shaft column is rotatably connected with the rotating connecting rod structure, the rotating shaft column is used to drive the angular rotation of the rotating connecting rod structure, and a stable central counterweight block is connected to the surface of the side end frame of the rotating connecting rod structure.

[0007] Preferably, a horizontal displacement lead screw guide rail is installed at the top of the stable central counterweight block, a positioning seat is slidably connected inside the vertical short lead screw guide rail, a frame is connected to the bottom of the positioning seat, short displacement rail grooves are symmetrically installed at the bottom end of the frame, a connecting slider is slidably connected to the bottom end of the short displacement rail groove, a rotating servo motor is installed at the central end of the frame, and two groups of universal connection transmission rod structures are symmetrically connected to the bottom output end of the rotating servo motor.

[0008] Preferably, compaction scraping plates are connected to the side ends of the two groups of universal connection transmission rod structures, the compaction scraping plates are connected with the connecting sliders, a driving gear structure is installed inside the compaction scraping plates, racks are meshed with the top and bottom ends of the driving gear structure, and extension plates are connected to the side ends of the racks.

[0009] Preferably, a third driving device is installed inside the upper pressing die, a second driving device is installed inside the lower pressing die, and the third driving device drives the upper pressing die to move downward.

[0010] Preferably, the second driving device drives the lower pressing die to move upward to simultaneously press the molding sand in the sand box from two directions, top and bottom.

[0011] Preferably, the template of the upper pressing die adopts an array regionalized small template arrangement, a plurality of the small templates are arranged in a matrix to form the template working surface of the upper pressing die, and each small template is independently connected with a fine adjustment driving mechanism.

[0012] Preferably, pneumatic sealing plates are slidably connected to both the left and right ends of the sand box. The pneumatic sealing plates are driven by cylinders to slide vertically along the side walls of the sand box. One end of the sand box is provided with a pneumatic transmission rod structure, which consists of a pneumatic rod, a transmission structure, an impact plate, and a visual detection sensor. The pneumatic transmission rod structure is used to detect the three-dimensional distribution state of the molding sand in the sand box and change the impact angle and impact force of the impact plate on the sand box by changing the transmission parameters of the pneumatic rod and the transmission structure.

[0013] Preferably, the impact plate is composed of a base plate, an impact head array, and a buffer layer. The base plate is connected to the end of the pneumatic transmission rod structure.

[0014] Preferably, a sand shooting pipe is connected to the side end of the sand box, and the top end of the sand shooting pipe is connected to a sand shooting box.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In the present invention, with the cooperation of the lever-type molding sand distribution structure, by using the cooperation of the rotating connecting rod structure and the lever structure, multi-angle rotary spreading can be realized under the drive of the motor source. Combined with the high-frequency vibration of the ultrasonic generator, the molding sand can be spread quickly and evenly, and at the same time, the molding sand is pre-compacted, improving the uniformity of the initial density of the molding sand and laying a solid foundation for subsequent precision compaction. In addition, for sand molds with different depths, the rotating shaft column can adjust the inclination angle of the rotating connecting rod structure, and with the intelligent adjustment of the extension plate, precise distribution of the molding sand in three-dimensional space is achieved, the filling rate in the deep cavity part is increased, and the problem of serious accumulation of molding sand in areas such as deep cavities and bosses in the traditional process is effectively solved.

[0016] 2. In the present invention, the upper pressing mold adopts an array regionalized small template layout. Each small template realizes independent lifting through a fine-tuning drive mechanism (electric push rod). Combined with the closed-loop feedback of the pressure sensor and the external PLC controller, precise pressure can be applied to the molding sand in different regions according to the preset pressure distribution model, resulting in a small deviation in the overall compactness of the sand mold and an improvement in the compactness of the key parts of the complex sand mold. At the same time, the two-way synchronous pressure application of the upper pressing mold and the lower pressing mold, combined with the directional impact strengthening of the impact plate of the pneumatic transmission rod structure on the local area of the molding sand, further improves the overall quality of the sand mold, reduces the dimensional accuracy error of the casting, and reduces the rejection rate.

[0017] 3. In the present invention, the stable central counterweight block controls the position of the counterweight block through two groups of micro electromagnetic guide rods, dynamically adjusts the center of gravity distribution in real time, offsets the centrifugal force, and controls the vibration amplitude of the overall equipment within the operating range. Compared with the traditional fixed counterweight method, the vibration amplitude is reduced by more than [X], effectively reducing equipment wear and extending the service life of the equipment. Description of the Drawings

[0018] Figure 1It is a schematic structural diagram of the front view in a high-speed horizontal phase-separating molding machine for casting according to the present invention; Figure 2 It is a schematic structural diagram of the side view in a high-speed horizontal phase-separating molding machine for casting according to the present invention; Figure 3 It is a schematic structural diagram of a lever-type sand distributing structure in a high-speed horizontal phase-separating molding machine for casting according to the present invention; Figure 4 It is a schematic installation position structural diagram of a pneumatic transmission rod structure in a high-speed horizontal phase-separating molding machine for casting according to the present invention; Figure 5 It is a schematic structural diagram of a lever-type sand distributing structure in a high-speed horizontal phase-separating molding machine for casting according to the present invention; Figure 6 It is in a high-speed horizontal phase-separating molding machine for casting according to the present invention Figure 5 The enlarged structural diagram of part A; Figure 7 It is a partial structural diagram of a lever-type sand distributing structure in a high-speed horizontal phase-separating molding machine for casting according to the present invention; Figure 8 It is a schematic installation position structural diagram of a driving gear structure and a rack in a high-speed horizontal phase-separating molding machine for casting according to the present invention.

[0019] In the figure: 100, lower pressing mold; 200, upper pressing mold; 300, pneumatic transmission rod structure; 400, first driving device; 500, model magnetic connection end; 600, pneumatic sealing plate; 700, lever-type sand distributing structure; 701, horizontal displacement screw rod guide rail; 702, stable central counterweight block; 704, rotating connecting rod structure; 705, vertical short screw rod guide rail; 706, motor source; 707, bevel gear structure; 708, rotating shaft column; 709, positioning seat; 710, short displacement track groove; 711, linear ball guide rail; 712, ultrasonic generator; 713, connecting slider; 714, rotating servo motor; 715, universal joint transmission rod structure; 716, compaction scraper; 717, extension plate; 718, driving gear structure; 719, rack; 800, sand injection box; 900, sand injection pipe; 110, sand box. Detailed implementation manners

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] In view of the core problems existing in the traditional high-speed horizontal stripping molding machine for casting, such as uneven distribution of molding sand, insufficient compactness, low forming accuracy of complex sand molds, and poor equipment stability, the present invention provides a casting equipment with high precision, high efficiency and strong adaptability through the collaborative innovation of multiple components and intelligent control.

[0022] To achieve the above object, the present invention provides the following technical solutions. Referring to Figure 1 、 Figure 2 and Figure 4 as shown: A high-speed horizontal stripping molding machine for casting, comprising: A lower pressing mold 100 for supporting the bottom forming of the sand mold. A sand box 110 is arranged above the lower pressing mold 100 and is used for accommodating molding sand to form a sand mold. An upper pressing mold 200 is arranged above the sand box 110 and is used for compacting and forming the molding sand in the sand box 110. A translational model assembly, which includes a model magnetic connection end 500 and a first driving device 400 for driving the model magnetic connection end 500 to translate between the upper pressing mold 200 and the lower pressing mold 100. A model plate is arranged on the template surface of the lower pressing mold 100, and the model magnetic connection end 500 is used for magnetic connection with the side end of the model plate that is slidably connected inside the sand box 110.

[0023] In a specific embodiment, the model plate is fixed on the surface of the lower pressing mold 100, and the model magnetic connection end 500 is standby on the side of the upper pressing mold 200. When the external PLC controller sends an instruction, the first driving device 400 drives the model magnetic connection end 500 to translate to the side end of the model plate inside the sand box 110. The model magnetic connection end 500 is composed of an electromagnetic coil group and a permanent magnet base. When the electromagnetic coil group inside the model magnetic connection end 500 is energized, it cooperates with the permanent magnet base to generate a strong magnetic field, sucking up and fixing the model plate from the surface of the lower pressing mold 100. Secondly, the model magnetic connection end 500 carries the old model plate and translates out of the sand box 110 and places it in the waste area. By adjusting the magnitude of the electromagnetic coil current, the adsorption force range is dynamically adjusted to 50-200N to avoid the model plate falling off due to insufficient suction or overloading and damaging the mold. Then, the model magnetic connection end 500 carrying the new model plate translates reversely to the sand box 110, and the electromagnetic coil is powered off to demagnetize, releasing the new model plate to the lower pressing mold 100.

[0024] In an embodiment of the present invention, according to Figures 5 - 8 as shown, a lever-type molding sand even distribution structure 700, which includes a rotating connecting rod structure 704 arranged inside the sand box 110, a lever structure connected to the rotating connecting rod structure 704, and a motor source 706 for driving the rotating connecting rod structure 704 to rotate. When the lever structure rotates the rotating connecting rod structure 704 driven by the motor source 706, it rotates inside the sand box 110 to evenly spread the molding sand in the sand box 110.

[0025] A vertical short lead screw guide rail 705 is installed at the side end of the rotating connecting rod structure 704. A bevel gear structure 707 is installed at the output end of the motor source 7*6. The output end of the bevel gear structure 707 is connected to a rotating shaft column 708. The outside of the rotating shaft column 708 is rotatably connected to the rotating connecting rod structure 704. The rotating shaft column 708 is used to drive the rotating connecting rod structure 704 to rotate in angle. A stable central counterweight 702 is connected to the surface of the side end frame of the rotating connecting rod structure 704. The stable central counterweight 702 is composed of a counterweight cylinder, two counterweights and two groups of micro electromagnetic guide rods. The two groups of micro electromagnetic guide rods drive the two counterweights to slide inside the counterweight cylinder respectively.

[0026] A horizontal displacement lead screw guide rail 701 is installed at the top of the stable central counterweight 702. A positioning seat 709 is slidably connected inside the vertical short lead screw guide rail 705. The bottom of the positioning seat 709 is connected to a frame. At the bottom end of the frame, short displacement rail grooves 710 are symmetrically installed. A connecting slider 713 is slidably connected to the bottom end of the short displacement rail groove 710. A rotating servo motor 714 is installed at the central end of the frame. Two groups of universal joint transmission rod structures 715 are symmetrically connected to the bottom output end of the rotating servo motor 714.

[0027] Compacting scrapers 716 are connected to the side ends of the two groups of universal joint transmission rod structures 715. The compacting scrapers 716, the connecting slider 713, the short displacement rail grooves 710, the positioning seat 709, the two groups of universal joint transmission rod structures 715, the vertical short lead screw guide rail 705 and the rotating servo motor 714 form a lever structure. The compacting scraper 716 is connected to the connecting slider 713. A driving gear structure 718 is installed inside the compacting scraper 716. The top and bottom ends of the driving gear structure 718 are meshed with racks 719 respectively. The side end of the rack 719 is connected to an extension plate 717. The extension plate 717 is located inside the compacting scraper 716. Linear ball guide rails 711 are installed at the left and right ends of the frame. An ultrasonic generator 712 is slidably connected to the outside of the linear ball guide rail 711.

[0028] In this embodiment, the core function of the lever-type molding sand even distribution structure 700 is to quickly and evenly distribute the molding sand accumulated after sand shooting in the sand box 110 and perform preliminary compaction, laying a foundation for the subsequent high-pressure compaction process. That is, the horizontal displacement screw rod guide 701 adopts a servo motor-driven trapezoidal screw rod structure, and through the feedback of an optical encoder (resolution 0.01mm), the stable central counterweight 702 is accurately translated to the geometric center of the sand box 110. This step is based on the CAD preset coordinate system to ensure that the counterweight is coaxial with the rotating shaft column 708, eliminating the initial eccentric error and laying a foundation for dynamic balance. The vertical short screw rod guide 705 is equipped with a ball screw pair and a linear guide rail, and is driven by a stepping motor (step angle 0.75°). The positioning seat 709 can be adjusted along the Z-axis direction. According to the designed height of the sand mold, the distance between the compaction scraper 716 and the bottom of the sand box is automatically calculated as a whole (default 5-10mm) to avoid scratching the pattern plate and at the same time reserve enough space for the molding sand to flow. The rotating shaft column 708 and the bevel gear structure 707 form an angle adjustment mechanism. The servo motor drives the rotation of the driving bevel gear to achieve the tilt adjustment of the rotating connecting rod structure 704 by ±30°. The whole is default to start in the 0° horizontal state to ensure the even distribution efficiency of shallow sand molds. (The rotating shaft column 708 realizes the ±30° angle adjustment through the bevel gear structure 707. For example, for shallow sand molds (H≤200mm), they are quickly evenly distributed in the horizontal state (0°), for medium-depth sand molds (200mm<H≤300mm), they are tilted at 15° to take into account the distribution of molding sand on the surface and the bottom, and for deep cavity sand molds (H>300mm), they are tilted at 30° to focus on processing deep concave areas, and cooperate with the extension plate 717 to achieve three-dimensional even distribution). And the ultrasonic generator 712 moves along the linear ball guide rail 711 to emit high-frequency vibration. The vibration is transmitted to the molding sand through the compaction scraper 716, and the cavitation effect is used to reduce the friction between particles. (Or the high-frequency vibration can be transmitted to the inner wall of the sand box 110). The parameters are automatically adjusted according to the humidity of the molding sand as a whole. For example, in the case of wet sand working conditions, a low frequency of 25kHz and an amplitude of 15μm are used to enhance fluidity, while in the case of dry sand working conditions, it is switched to a high frequency of 35kHz and an amplitude of 8μm to prevent dust. At the same time, the horizontal displacement screw rod guide 701 drives the stable central counterweight 702 to translate to the center position of the sand box 110, and the vertical short screw rod guide 705 adjusts the height of the positioning seat 709 to lower the compaction scraper 716 away from the bottom of the sand box. The rotating shaft column 708 adjusts the tilt angle of the rotating connecting rod structure 704 through the bevel gear structure 707 (default 0° horizontal state). At this time, the motor source 706 drives the rotation of the rotating connecting rod structure 704, and the lever structure (compaction scraper 716) moves along the angular trajectory with the rotating connecting rod structure 704 to evenly distribute the molding sand from the center to the edge or from the edge to the center. The micro electromagnetic guide rod in the stable central counterweight 702 dynamically adjusts the position of the counterweight according to the rotation speed to offset the centrifugal force. The rotating servo motor 714 drives the compaction scraper 716 to make a reciprocating linear motion along the short displacement track 710 to enhance the lateral fluidity of the molding sand.And the driving gear structure 718 extends the extension plate 717 through the control of a stepper motor. After the visual inspection identifies the corner area of the sand box, the external PLC controller automatically calculates the extension amount according to the edge curvature. The stable central counterweight 702 is composed of a counterweight cylinder, two counterweights, and two groups of micro electromagnetic guide rods. Its core principle is to change the center of gravity distribution of the rotating connecting rod structure 704 by adjusting the position of the counterweights in real time, so as to offset the centrifugal force generated during rotation and ensure the stable operation of the equipment. During the overall operation, the two groups of micro electromagnetic guide rods drive the two counterweights to slide inside the counterweight cylinder respectively. By changing the distance between the counterweights and the rotation center, the moment of inertia and the centrifugal force balance state of the rotating components are dynamically adjusted. That is, before the equipment starts, the horizontal displacement screw rod guide rail 701 drives the stable central counterweight 702 to translate to the center position of the sand box 110, laying a foundation for the subsequent work. At this time, the positions of the two counterweights in the counterweight cylinder are at the default initial balance positions of the system. This position is preset according to the static mass distribution of the rotating connecting rod structure 704 and its attached components (such as the vertical short screw rod guide rail 705, the positioning seat 709, etc.) to ensure the balance of the equipment before rotation. When the motor source 706 drives the rotating connecting rod structure 704 to rotate at a certain speed, the overall enters the dynamic adjustment stage. At this time, the acceleration sensor installed on the rotating connecting rod structure 704 monitors the vibration of the equipment in real time, converts the vibration data into electrical signals and transmits them to the external PLC controller. The external PLC controller calculates the magnitude and direction of the centrifugal force generated in the current state according to the preset algorithm, combined with parameters such as the current rotation speed and the inclination angle of the rotating connecting rod structure 704. To offset the increased centrifugal force, the control system sends instructions to the micro electromagnetic guide rods. The micro electromagnetic guide rods drive the counterweights to slide inside the counterweight cylinder through electromagnetic force. When the rotation speed increases, the electromagnetic guide rods push the counterweights to move towards the direction close to the rotation center to reduce the centrifugal force. When the rotating shaft column 708 adjusts the inclination angle of the rotating connecting rod structure 704, the whole will control the counterweights to move in the corresponding direction according to the new angle and center of gravity distribution, increasing the mass of the outer counterweights to maintain balance. For example, when processing a deep cavity sand mold (H>300mm), the rotating connecting rod structure 704 is inclined at 30°. At this time, the system detects abnormal vibration of the equipment. Through calculation and analysis, the control system instructs the outer micro electromagnetic guide rods to push the counterweights to slide outwards, increasing the outer mass. At the same time, the inner counterweights move appropriately towards the center to adjust the center of gravity position, so that the rotating components can still maintain balance in the inclined state. The external PLC controller adopts a closed-loop control strategy. The acceleration sensor continuously monitors the vibration of the equipment and compares the actual vibration data with the preset vibration threshold (such as the vibration amplitude <0.1mm). If the actual vibration amplitude exceeds the threshold, it means that the current position of the counterweights fails to effectively balance the centrifugal force. The external PLC controller immediately recalculates and adjusts the drive signal of the micro electromagnetic guide rods to change the position of the counterweights. This real-time feedback mechanism ensures that the whole can quickly respond to the changes in working conditions.Ensure that the equipment can maintain stable operation under various complex working conditions (such as different speeds and different tilt angles), and avoid problems such as equipment wear and poor sand distribution caused by excessive vibration.

[0029] In some embodiments, according to Figures 1 - 4 As shown, a third driving device is installed inside the upper mold 200, and a second driving device is installed inside the lower mold 100. The third driving device drives the upper mold 200 to move downward, and the second driving device drives the lower mold 100 to move upward, so as to apply pressure to the molding sand in the sand box 110 from both the upper and lower directions at the same time.

[0030] The template of the upper die 200 adopts an array of regionalized small templates. Multiple small templates are arranged in a matrix to form the template working surface of the upper die 200. Each small template is independently connected to a fine-tuning drive mechanism. The fine-tuning drive mechanism is used to drive the corresponding small template to independently rise and fall in a direction perpendicular to the template working surface to apply differentiated pressure to the molding sand in different areas. The fine-tuning drive mechanism includes an electric push rod, one end of the electric push rod is fixedly connected to the small template, and the other end is connected to the main frame of the upper die 200. The upper die 200 is also provided with a pressure sensor, which is used to detect the pressure applied by each small template and feed back the pressure data to an external PLC controller. The external PLC controller adjusts the extension and contraction of the electric push rod according to a preset pressure distribution model. Elastic seals are provided between adjacent small templates to prevent molding sand from entering the gaps between adjacent small templates.

[0031] The left and right ends of the sand box 110 are slidably connected with pneumatic sealing plates 600. The pneumatic sealing plates 600 are driven by a cylinder to slide vertically along the side walls of the sand box 110. A pneumatic transmission rod structure 300 is installed at one end of the sand box 110. The pneumatic transmission rod structure 300 consists of a pneumatic rod, a transmission structure, an impact plate and a visual detection sensor. The pneumatic transmission rod structure 300 is used to detect the three-dimensional distribution state of the molding sand in the sand box 110, and to change the transmission parameters of the pneumatic rod and the transmission structure to change the impact angle and impact force of the impact plate on the sand box 110.

[0032] The impact plate consists of a substrate, an impact head array and a buffer layer. The substrate is connected to the end of the pneumatic transmission rod structure 300. The impact head array is composed of multiple independent hydraulic impact heads, each of which has a built-in stress sensor and acceleration sensor. The buffer layer is arranged between the substrate and the impact head array.

[0033] The side end of the sand box 110 is connected to a sand shooting pipe 900 , and the top end of the sand shooting pipe 900 is connected to a sand shooting box 800 .

[0034] In a specific embodiment, the sand shooting box 800 sprays molding sand into the sand box 110 through the sand shooting pipe 900. The sand shooting pressure is automatically adjusted by an external PLC controller according to the volume of the sand box and the complexity of the sand mold. For example, for a complex sand mold, due to the large filling difficulty, the sand shooting pressure is automatically increased to ensure rapid and uniform filling of the molding sand. At this time, the pneumatic sealing plates 600 at both left and right ends of the sand box 110 slide vertically and close under the drive of the cylinder, and the wedge-shaped sealing lip is closely attached to the upper surface of the lower pressing mold 100 to form a line seal. The sealing pressure is monitored in real time by a pressure sensor. When the pressure is lower than the set value (such as 80 N / cm²), the cylinder automatically replenishes the pressure to prevent the molding sand from leaking during the compaction process. Then, the third driving device inside the upper pressing mold 200 (using a servo hydraulic cylinder) drives the upper pressing mold 200 to move downward, and the second driving device (also a servo hydraulic cylinder) inside the lower pressing mold 100 drives the lower pressing mold 200 to move upward, forming a two-way extrusion on the molding sand in the sand box 110. The pressure rising rate is adjustable. For a fragile sand mold, a low-speed pressure rise is adopted to avoid the collapse of the molding sand. At this time, the movements of the upper pressing mold 200 and the lower pressing mold 100 are coordinated by an external PLC controller through a synchronous control algorithm to ensure a reduction in the displacement error between the two. During the pressure application process, the total pressure is monitored in real time by a pressure sensor. When the preset value is reached, the driving device switches to the pressure holding state, and the pressure holding time is adjusted according to the characteristics of the molding sand. The template of the upper pressing die 200 is composed of multiple arrayed small templates. Each small template is connected to the main body frame through an electric push rod. A pressure sensor is installed at the bottom of the small template to detect the pressure in real time. At this time, the external PLC controller controls the telescopic movement of the electric push rod according to the preset pressure distribution model (generated based on the sand mold CAD model). For example, for the thin-walled area of the sand mold, the electric push rod corresponding to the small template shortens to reduce the downward pressure and avoid crushing. While for the small template in the deep cavity area, it elongates and increases the pressure to ensure the compactness. During the adjustment process, the pressure sensor feeds back the actual pressure data to the external PLC controller to form a closed-loop control, so that the pressure deviation is controlled. And the visual detection sensor of the pneumatic transmission rod structure 300 (using a structured light 3D scanner with a resolution of 0.1 mm) scans the molding sand in the sand box 110 to generate a three-dimensional density distribution model. The external PLC controller analyzes the model to identify the areas with insufficient compactness (such as areas with low density). According to the detection results, the external PLC controller adjusts the parameters of the pneumatic rod and the transmission structure, changes the angle (0 - 45°) and impact force of the impact plate. The impact head array of the impact plate consists of independent hydraulic impact heads. Each impact head is equipped with a stress sensor and an acceleration sensor to feedback the impact data in real time. For example, for a certain deep concave area, the impact plate is adjusted to a 30° inclination and pulsed impact is carried out with a certain force to strengthen the compactness of this area. The buffer layer effectively absorbs the impact reaction force, protects the equipment and reduces the vibration transmission. After the pressing is completed, the pressure sensor detects the pressure of each small template again and compares it with the preset value. If the pressure deviation in a certain area exceeds ±5%, it is determined as unqualified. For the unqualified area, if the deviation is small, the external PLC controller controls the corresponding small template to perform supplementary pressing. If the deviation is large, the pneumatic sealing plate 600 is triggered to open, and the sand mold is remolded after demolding to ensure that the quality of the sand mold meets the standard.

[0035] The wiring diagrams of the ultrasonic generator 712, pressure sensor, visual detection sensor, stress sensor and acceleration sensor in the present invention belong to the common knowledge in the art. Their working principles are already known technologies, and their models are selected according to actual use. Therefore, the control methods and wiring arrangements of the ultrasonic generator 712, pressure sensor, visual detection sensor, stress sensor and acceleration sensor will not be explained in detail.

[0036] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A high-speed horizontal demolding molding machine for casting, characterized in that, Comprising: A lower pressing die (100) for carrying out bottom forming of a sand mold; A sand box (110) provided above the lower pressing die (100) for accommodating molding sand to form a sand mold; An upper pressing die (200) provided above the sand box (110) for compacting and forming the molding sand in the sand box (110); A translational model assembly, which includes a model magnetic connection end (500) and a first driving device (400) for driving the model magnetic connection end (500) to translate between the upper pressing die (200) and the lower pressing die (100). A model plate is arranged on the template surface of the lower pressing die (100), and the model magnetic connection end (500) is used for magnetically connecting with the side end of the model plate that is slidably connected inside the sand box (110); A lever-type molding sand even distribution structure (700), which includes a rotating connecting rod structure (704) arranged inside the sand box (110), a lever structure connected to the rotating connecting rod structure (704), and a motor source (706) for driving the rotating connecting rod structure (704) to rotate. When the motor source (706) drives the rotating connecting rod structure (704) to rotate, the lever structure rotates inside the sand box (110) to evenly spread the molding sand in the sand box (110).

2. The high-speed horizontal stripping and molding machine for casting according to claim 1, characterized in that: A vertical short lead screw guide rail (705) is arranged at the side end of the rotating connecting rod structure (704). A bevel gear structure (707) is arranged at the output end of the motor source (706). The output end of the bevel gear structure (707) is connected to a rotating shaft column (708). The outside of the rotating shaft column (708) is rotatably connected to the rotating connecting rod structure (704). The rotating shaft column (708) is used to drive the rotating connecting rod structure (704) to rotate in angle. A stable central counterweight block (702) is connected to the surface of the side end frame of the rotating connecting rod structure (704).

3. The high-speed horizontal stripping molding machine for casting according to claim 2, wherein: A horizontal displacement lead screw guide rail (701) is arranged at the top of the stable central counterweight block (702). A positioning seat (709) is slidably connected inside the vertical short lead screw guide rail (705). The bottom of the positioning seat (709) is connected to a frame. Short displacement rail grooves (710) are symmetrically arranged at the bottom end of the frame. A connecting slider (713) is slidably connected to the bottom end of the short displacement rail grooves (710). A rotating servo motor (714) is arranged at the central end of the frame. Two groups of universal connection transmission rod structures (715) are symmetrically connected to the bottom output end of the rotating servo motor (714).

4. The high-speed horizontal stripping molding machine for casting according to claim 3, wherein: Compacting scraping plates (716) are connected to the side ends of the two groups of universal connection transmission rod structures (715). The compacting scraping plates (716) are connected to the connecting sliders (713). A driving gear structure (718) is arranged inside the compacting scraping plates (716). The top and bottom ends of the driving gear structure (718) are meshed with racks (719). An extension plate (717) is connected to the side end of the racks (719).

5. The high-speed horizontal stripping molding machine for casting according to claim 1, characterized in that: A third driving device is installed inside the upper pressing die (200), and a second driving device is installed inside the lower pressing die (100). The third driving device drives the upper pressing die (200) to move downward.

6. The high-speed horizontal stripping and molding machine for casting according to claim 5, wherein: The second driving device drives the lower pressing die (100) to move upward to simultaneously press the molding sand in the sand box (110) from the upper and lower directions.

7. The high-speed horizontal stripping and molding machine for casting according to claim 1, wherein: The template of the upper pressing die (200) is arranged with small templates in an array area. A plurality of the small templates are arranged in a matrix to form the template working surface of the upper pressing die (200). Each small template is independently connected to a fine-tuning driving mechanism.

8. The high-speed horizontal stripping molding machine for casting according to claim 1, characterized in that: Pneumatic sealing plates (600) are slidably connected to both the left and right ends of the sand box (110). The pneumatic sealing plates (600) are driven by cylinders to slide vertically along the side walls of the sand box (110). A pneumatic transmission rod structure (300) is installed at one end of the sand box (110). The pneumatic transmission rod structure (300) is composed of a pneumatic rod, a transmission structure, an impact plate, and a visual detection sensor. The pneumatic transmission rod structure (300) is used to detect the three-dimensional distribution state of the molding sand in the sand box (110), and by changing the transmission parameters of the pneumatic rod and the transmission structure, to change the impact angle and impact force of the impact plate on the sand box (110).

9. The high-speed horizontal stripping and molding machine for casting according to claim 8, wherein: The impact plate is composed of a substrate, an impact head array, and a buffer layer. The substrate is connected to the end of the pneumatic transmission rod structure (300).

10. The high-speed horizontal stripping molding machine for casting according to claim 1, wherein: A sand injection pipe (900) is connected to the side end of the sand box (110), and the top end of the sand injection pipe (900) is connected to a sand injection box (800).

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