Automatic lifting device for casting acrylic plate sliding transfer and lifting method thereof

Abstract

The application discloses a casting acrylic plate sliding transfer automatic lifting device, which comprises a transfer base, a sliding supporting plate fixed to the top of the transfer base and used for receiving the delivered acrylic plate, two groups of automatic lifting assemblies symmetrically arranged on the two sides of the top of the transfer base, each group of automatic lifting assemblies comprising a lifting cylinder, at least one guide column, a lifting supporting plate and a pressure sensor, the lifting cylinder being vertically fixed to the top of the transfer base, the output end of the lifting cylinder being fixedly connected with the bottom of the lifting supporting plate, and the lifting cylinders in the two groups of automatic lifting assemblies being synchronously driven. The combination of the transverse limiting plate, the longitudinal limiting block and the double position sensors ensures that the acrylic plate is accurately limited before being lifted, and the controller starts lifting only after confirming that the plate is delivered in place and stably parked, so that the lifting inclination and sliding caused by the position deviation are avoided.

Description

Technical Field

[0001] This application relates to the field of acrylic sheet production equipment technology, and in particular to an automatic lifting device and method for sliding transfer of cast acrylic sheets. Background Technology

[0002] On the production line for casting acrylic sheets, the sheets are automatically lifted after being transferred to a designated station via a sliding conveyor so that they can proceed to the next process.

[0003] Most existing lifting devices directly use cylinders for lifting, lacking effective detection of whether the sheet material is accurately delivered and whether it is placed stably. They also lack reliable guiding and anti-deviation structures and real-time pressure feedback mechanisms, which makes the sheet material prone to lateral displacement or tilting during the lifting process. Furthermore, rigid lifting can easily cause hard contact with the sheet material, resulting in scratches or even cracks on the acrylic sheet surface, affecting product yield and production efficiency. Summary of the Invention

[0004] To solve the above-mentioned technical problems, this application provides an automatic lifting device and lifting method for sliding transfer of cast acrylic sheets.

[0005] An automatic lifting device for sliding transfer of cast acrylic sheets includes a transfer base; A sliding tray is fixed to the top of the transfer base to receive the transported acrylic sheet; Two sets of automatic lifting components are symmetrically arranged on both sides of the top of the transfer base. Each set of automatic lifting components includes a lifting cylinder, at least one guide column, a lifting plate, and a pressure sensor. The lifting cylinder is vertically fixed to the top of the transfer base, and its output end is fixedly connected to the bottom of the lifting plate. The lifting cylinders in the two sets of automatic lifting components are driven synchronously. The lower end of the guide column is fixed to the transfer base, and the upper end slides through the lifting plate. The lifting plate is flush with the upper surface of the sliding plate in the initial state. The pressure sensor is set on the upper surface of the lifting plate and is used to detect the pressure of the acrylic sheet. A positioning and limiting component includes two transverse limiting plates, a longitudinal limiting block, at least one first position sensor, and at least one second position sensor; the two transverse limiting plates are symmetrically arranged on both sides of the sliding tray; the longitudinal limiting block is fixed to the end of the sliding tray in the conveying direction; the first position sensor is disposed on the inner side of the longitudinal limiting block and is used to detect whether the acrylic sheet has been conveyed into place; the second position sensor is disposed on the upper surface of the lifting tray and is used to detect whether the acrylic sheet is stably placed on the lifting tray. The system includes a controller, wherein the first position sensor, the second position sensor, the pressure sensor, and the valve group that drives the lifting cylinder are all electrically connected to the controller; the controller is configured to control the two sets of lifting cylinders to synchronously drive the lifting pallet to rise when it simultaneously receives the position signals from the first position sensor and the second position sensor, and to control the lifting cylinders to stop according to the pressure signal fed back by the pressure sensor.

[0006] As a preferred embodiment of the above technical solution, the sliding support plate is provided with a clearance opening, and the lifting support plate is initially located within the clearance opening.

[0007] As a preferred embodiment of the above technical solution, it further includes two sets of conveying slide rails, symmetrically arranged on both sides of the top of the transfer base, with the sliding tray located between the two sets of conveying slide rails.

[0008] As a preferred embodiment of the above technical solution, the upper surface of the lifting tray is provided with a buffer pad, and the upper surface of the sliding tray is also provided with the buffer pad.

[0009] As a preferred embodiment of the above technical solution, each automatic lifting assembly includes at least two guide columns, and the guide columns are symmetrically distributed on both sides of the lifting cylinder.

[0010] As a preferred embodiment of the above technical solution, the sensing surface of the pressure sensor is flush with the upper surface of the buffer pad.

[0011] As a preferred embodiment of the above technical solution, the two lateral limiting plates are detachably fixed to both sides of the sliding support plate by bolts, and the sliding support plate is provided with corresponding lateral elongated holes for the bolts to pass through, so as to adjust the distance between the two lateral limiting plates.

[0012] As a preferred embodiment of the above technical solution, the inner surface of the longitudinal limiting block is also provided with the buffer pad.

[0013] As a preferred embodiment of the above technical solution, the first position sensor is embedded inside the longitudinal limiting block, and the second position sensor is embedded on the upper surface of the lifting tray.

[0014] As a preferred embodiment of the above technical solution, the controller is configured to stop the lifting cylinder when the pressure value fed back by the pressure sensor reaches a preset stable rise threshold.

[0015] The automatic lifting method for sliding transfer of cast acrylic sheets, using the aforementioned automatic lifting device for sliding transfer of cast acrylic sheets, includes the following steps: S1. The acrylic sheet is conveyed to the upper surface of the sliding tray, and the two lateral limiting plates restrict the lateral displacement of the acrylic sheet until the front end of the acrylic sheet abuts against the longitudinal limiting block. S2. The first position sensor detects that the acrylic plate has been delivered to the designated position and sends a first positioning signal. The second position sensor detects that the acrylic plate has been stably placed on the lifting pallet and sends a second positioning signal. S3. After the controller receives the first positioning signal and the second positioning signal at the same time, it controls the lifting cylinders in the two sets of automatic lifting components to extend synchronously, driving the two lifting pallets to move vertically upward along the guide column, and smoothly lifting the acrylic plate from the sliding pallet. S4. During the lifting process, the pressure sensor feeds back the pressure value to the controller in real time. The controller controls the two sets of lifting cylinders to stop according to the pressure signal, thus completing the automatic lifting of the acrylic plate.

[0016] In summary, the present invention has at least one of the following beneficial technical effects: (1) By combining the horizontal limiting plate, the vertical limiting block and the dual position sensor, the acrylic plate is accurately limited before being raised, and the controller only starts raising after confirming that the plate is delivered in place and parked smoothly, thus avoiding tilting and slipping caused by position deviation.

[0017] (2) The dual cylinder synchronous drive is used in conjunction with the guide column to form a stable guide in the vertical direction. The lifting plate does not shake or tilt during the lifting process, ensuring that the plate is raised smoothly.

[0018] (3) The pressure sensor provides real-time feedback on the pressure exerted by the plate on the lifting pallet. The controller precisely controls the timing of the lifting stop based on the pressure signal to prevent over-lifting or under-lifting. At the same time, the buffer pad avoids rigid contact and eliminates the risk of surface damage. Attached Figure Description

[0019] Figure 1 The diagram shown is a three-dimensional structural illustration provided in an embodiment of the present invention; Figure 2 The embodiments of the present invention shown provide Figure 1 A schematic diagram of the elevated state structure.

[0020] Legend: 1. Transfer base; 2. Conveyor rail; 3. Sliding pallet; 301. Clearance opening; 4. Automatic lifting assembly; 401. Lifting cylinder; 402. Guide column; 403. Lifting pallet; 404. Pressure sensor; 5. Positioning and limiting assembly; 501. Lateral limiting plate; 502. Longitudinal limiting block; 503. First position sensor; 504. Second position sensor; 6. Buffer pad; 7. Acrylic sheet. Detailed Implementation

[0021] The present application will be further described in detail below with reference to the embodiments.

[0022] like Figure 1 and Figure 2 As shown in the embodiment of the present invention, the automatic lifting device for sliding transfer of cast acrylic sheet includes a transfer base 1, which is a rectangular frame structure welded from steel profiles, serving as the supporting foundation for the entire device. Two sets of conveying slide rails 2 are symmetrically fixed on both sides of the top of the transfer base 1 in the left-right direction. Each set of conveying slide rails 2 consists of multiple rollers arranged side by side, relying on external power or the weight of the sheet to slide and transport the acrylic sheet 7 forward in the front-back direction.

[0023] A sliding tray 3 is fixedly installed on the top of the transfer base 1 between the two sets of conveying slide rails 2 by bolts. The sliding tray 3 is a flat plate structure, and its upper surface serves as a parking platform for the acrylic plate 7 after it slides in. The upper surface of the sliding tray 3 is at the same height as the conveying surface of the conveying slide rail 2, ensuring that the acrylic plate 7 can slide smoothly from the conveying slide rail 2 onto the sliding tray 3. A rectangular clearance opening 301 is provided in the central area of ​​the sliding tray 3. The clearance opening 301 has a certain length in the front-back direction and a certain width in the left-right direction.

[0024] There are two sets of automatic lifting components 4, which are symmetrically arranged on the front and rear sides of the top of the transfer base 1 and are located between the left and right sets of conveying slide rails 2. Each set of automatic lifting components 4 includes a lifting cylinder 401, four guide columns 402, a lifting pallet 403 and a pressure sensor 404. The cylinder body of the lifting cylinder 401 is vertically fixed to the corresponding mounting plate on the top of the transfer base 1, with its piston rod extending upwards. The end of the piston rod is fixedly connected to the bottom center of the lifting pallet 403 via a flange. The two lifting cylinders 401 in the two sets of automatic lifting components 4 are controlled by the same solenoid valve group to achieve synchronous drive of the two cylinders, thereby ensuring that the two lifting pallets 403 remain on the same horizontal plane during the lifting process. Four guide columns 402 are symmetrically distributed on the left and right sides of the lifting cylinder 401 in pairs. The lower end of each guide column 402 is fixed in the corresponding mounting hole on the transfer base 1, and the upper end slides through the corresponding guide hole on the lifting pallet 403. A wear-resistant guide sleeve is fixed in the guide hole. The guide column 402 and the guide sleeve are clearance fit, thereby strictly guiding the lifting pallet 403 vertically during the lifting process and preventing any deviation or tilting.

[0025] In the initial state, the lifting plate 403 is completely positioned within the clearance opening 301 of the sliding plate 3. The upper surface of the lifting plate 403 is completely flush with the upper surface of the sliding plate 3, forming a smooth and even bearing surface, allowing the acrylic plate 7 to slide to the predetermined position without obstruction. A groove is provided on the upper surface of the lifting plate 403, and the pressure sensor 404 is embedded in the groove with its sensing surface facing upward. Both the upper surfaces of the lifting plate 403 and the upper surfaces of the sliding plate 3 are fully fitted and fixed with buffer pads 6, which are made of rubber. The buffer pads 6 on the lifting plate 403 have clearance holes corresponding to the positions of the pressure sensor 404, ensuring that the sensing surface of the pressure sensor 404 is flush with the upper surface of the buffer pad 6. This not only ensures the accuracy of pressure detection but also prevents any hard metal contact between the upper surface of the lifting plate 403 and the acrylic plate 7 by fully covering the upper surface of the lifting plate 403 with the buffer pad 6.

[0026] The positioning and limiting component 5 is used to precisely limit and detect the end point of the acrylic sheet 7 during transport and its stable parking. Two transverse limiting plates 501 are symmetrically arranged on the left and right sides of the sliding tray 3. Each side edge of the sliding tray 3 has a row of transverse elongated holes extending in the left and right direction. Each transverse limiting plate 501 is connected by two bolts passing through the corresponding transverse elongated holes and engaging with nuts, achieving detachable connection and stepless adjustment of the transverse position. By loosening the bolts, the distance between the two transverse limiting plates 501 can be adjusted to accommodate casting acrylic sheets of different widths. After adjustment, tightening the bolts on the force plate will create a hard limit in the left and right directions for the plate during transfer and lifting, preventing it from moving laterally. The longitudinal limit block 502 is fixed to the end of the sliding pallet 3 in the conveying direction by bolts. The main body of the longitudinal limit block 502 spans across the sliding pallet 3, and its inner side facing the material direction is used to resist the front end of the acrylic plate 7, thereby limiting the final stop position of the plate. The inner side surface of the longitudinal limit block 502 is also fitted with a buffer pad 6 to buffer the impact when the plate comes into contact with the material.

[0027] The first position sensor 503 is embedded in the mounting hole on the inner side of the longitudinal limiting block 502, with its detection surface facing the incoming material direction. It is used to detect whether the front end of the acrylic sheet 7 has been properly abutted. The second position sensor 504 is embedded in the mounting hole on the upper surface of the lifting pallet 403, located next to the pressure sensor 404. Its detection surface faces upward. It is used to sense whether the lower surface of the acrylic sheet 7 has been completely covered and pressed against the lifting pallet 403, i.e., to detect whether the sheet has been placed stably. Both the first position sensor 503 and the second position sensor 504 are contact microswitches, which trigger a signal when the sheet touches them. The pressure sensor 404 is a thin-film pressure sensor, which can accurately detect the pressure exerted by the sheet on the lifting pallet 403.

[0028] The controller is installed in the electrical control box on one side of the transfer base 1, and its core is a PLC. The first position sensor 503, the second position sensor 504, the pressure sensor 404, and the solenoid valve controlling the lifting cylinder 401 are all connected to the controller via signal cables. The controller has a preset logic program: only when it simultaneously receives valid trigger signals from the first position sensor 503 and the second position sensor 504 will it determine that the acrylic plate 7 has been transported to the correct position and is stably placed on the lifting pallet 403. At this time, the controller controls the solenoid valve to actuate, compressing air... The two lifting cylinders 401 enter their lower chambers, and their piston rods extend synchronously, driving the lifting support plate 403 to move vertically upward along the four guide columns 402. During the lifting process, the pressure sensor 404 continuously transmits the pressure value detected in real time to the controller, which performs real-time comparison and analysis of the pressure value. When the pressure value enters the preset stable range, it indicates that the acrylic plate 7 has completely detached from the sliding support plate 3 and has been stably lifted. The controller immediately controls the solenoid valve to cut off the air circuit and achieve pressure holding and self-locking. The lifting cylinder 401 stops at the current position, completing the precise lifting action.

[0029] An automatic lifting method for sliding transfer of cast acrylic sheets; including the following steps: S1. The acrylic sheet is conveyed to the upper surface of the sliding tray 3, and the two lateral limiting plates 501 restrict the lateral displacement of the acrylic sheet until the front end of the acrylic sheet abuts against the longitudinal limiting block 502. S2. The first position sensor 503 detects that the acrylic plate has been delivered to the position and sends a first position signal. The second position sensor 504 detects that the acrylic plate has been stably placed on the lifting support plate 403 and sends a second position signal. S3. After the controller receives the first positioning signal and the second positioning signal at the same time, it controls the lifting cylinders 401 in the two sets of automatic lifting components 4 to extend synchronously, driving the two lifting pallets 403 to move vertically upward along the guide column 402, and smoothly lifting the acrylic plate from the sliding pallet 3. S4. During the lifting process, the pressure sensor 404 feeds back the pressure value to the controller in real time. The controller controls the two sets of lifting cylinders 401 to stop according to the pressure signal, thus completing the automatic lifting of the acrylic plate.

[0030] The specific method for automatically raising and sliding the casting acrylic sheet using this device is as follows: First, the cast acrylic sheet 7 is pushed forward from the previous process along the conveyor rail 2. Under its own weight or thrust, the sheet gradually slides into the upper surface of the sliding tray 3. During the sliding process, the lateral limiting plates 501 on both sides restrict the left and right lateral position of the sheet in real time, so that it always moves in the center direction until the front end of the acrylic sheet 7 touches and presses against the buffer pad 6 inside the longitudinal limiting block 502. At this time, the first position sensor 503 at the longitudinal limiting block 502 is triggered by the front end of the acrylic sheet 7 and sends out the first positioning signal. Simultaneously, the bottom surface of the acrylic plate 7 rests completely on the buffer pad 6 of the lifting support plate 403, triggering the second position sensor 504 on the lifting support plate 403 to send a second positioning signal. After the controller collects the two positioning signals at the same time, it determines that the positioning is ready, and then opens the air circuit, the solenoid valve reverses, and the two lifting cylinders 401 synchronously drive their respective connected lifting support plates 403 to rise smoothly. The sliding fit between the four guide columns 402 and the guide holes of the lifting support plate 403 ensures that the lifting support plate 403 maintains a vertical movement trajectory throughout the entire lifting process, without any shaking or tilting. As the lifting support plate 403 rises, the pressure sensor 404 measures the pressure value of the plate acting on it in real time. When the controller recognizes that the pressure value is stable within the preset stable lifting threshold range, it determines that the plate has been reliably lifted to the target state, immediately controls the solenoid valve to close and maintain pressure, and the lifting cylinders 401 stop moving. At this point, the acrylic sheet 7 was precisely and smoothly raised to the predetermined height, awaiting removal by a robotic arm or operator; the entire transfer and raising process caused no scratches or damage to the sheet.

[0031] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it.

Claims

1. An automatic lifting device for sliding transfer of cast acrylic sheets, characterized in that: include: A transfer base (1); A sliding tray (3) is fixed to the top of the transfer base (1) to receive the transported acrylic sheet; Two sets of automatic lifting components (4) are symmetrically arranged on both sides of the top of the transfer base (1). Each set of automatic lifting components (4) includes a lifting cylinder (401), at least one guide column (402), a lifting plate (403), and a pressure sensor (404). The lifting cylinder (401) is vertically fixed to the top of the transfer base (1), and its output end is fixedly connected to the bottom of the lifting plate (403). The lifting cylinders (401) in the two sets of automatic lifting components (4) are driven synchronously. The lower end of the guide column (402) is fixed to the transfer base (1), and the upper end slides through the lifting plate (403). The lifting plate (403) is flush with the upper surface of the sliding plate (3) in the initial state. The pressure sensor (404) is set on the upper surface of the lifting plate (403) and is used to detect the pressure of the acrylic plate. A positioning and limiting component (5) includes two transverse limiting plates (501), a longitudinal limiting block (502), at least one first position sensor (503), and at least one second position sensor (504); the two transverse limiting plates (501) are symmetrically arranged on both sides of the sliding tray (3); the longitudinal limiting block (502) is fixed to the end of the conveying direction of the sliding tray (3); the first position sensor (503) is arranged inside the longitudinal limiting block (502) and is used to detect whether the acrylic plate is conveyed to the correct position; the second position sensor (504) is arranged on the upper surface of the lifting tray (403) and is used to detect whether the acrylic plate is stably placed on the lifting tray (403); The controller is provided, wherein the first position sensor (503), the second position sensor (504), the pressure sensor (404), and the valve group that drives the lifting cylinder (401) are all electrically connected to the controller; the controller is configured to control the two sets of lifting cylinders (401) to synchronously drive the lifting pallet (403) to rise when simultaneously receiving the position signals from the first position sensor (503) and the second position sensor (504), and to control the lifting cylinder (401) to stop according to the pressure signal fed back by the pressure sensor (404).

2. The automatic lifting device for sliding transfer of cast acrylic sheets according to claim 1, characterized in that: The sliding tray (3) has a clearance opening (301), and the lifting tray (403) is located in the clearance opening (301) in the initial state.

3. The automatic lifting device for sliding transfer of cast acrylic sheets according to claim 1, characterized in that: It also includes two sets of conveying slide rails (2), which are symmetrically arranged on both sides of the top of the transfer base (1), and the sliding tray (3) is located between the two sets of conveying slide rails (2).

4. The automatic lifting device for sliding transfer of cast acrylic sheets according to claim 1, characterized in that: The upper surface of the lifting pallet (403) is provided with a buffer pad (6), and the upper surface of the sliding pallet (3) is also provided with the buffer pad (6).

5. The automatic lifting device for sliding transfer of cast acrylic sheets according to claim 1, characterized in that: Each automatic lifting assembly (4) includes at least two guide posts (402), and the guide posts (402) are symmetrically distributed on both sides of the lifting cylinder (401).

6. The automatic lifting device for sliding transfer of cast acrylic sheets according to claim 4, characterized in that: The sensing surface of the pressure sensor (404) is flush with the upper surface of the buffer pad (6).

7. The automatic lifting device for sliding transfer of cast acrylic sheets according to claim 1, characterized in that: The two transverse limiting plates (501) are respectively detachably fixed to both sides of the sliding support plate (3) by bolts. The sliding support plate (3) is provided with transverse elongated holes for the bolts to pass through, so as to adjust the distance between the two transverse limiting plates (501).

8. The automatic lifting device for sliding transfer of cast acrylic sheets according to claim 4, characterized in that: The inner surface of the longitudinal limiting block (502) is also provided with the buffer pad (6).

9. The automatic lifting device for sliding transfer of cast acrylic sheets according to claim 1, characterized in that: The first position sensor (503) is embedded in the inner side of the longitudinal limiting block (502), and the second position sensor (504) is embedded in the upper surface of the lifting plate (403).

10. A method for automatically raising and sliding transfer of cast acrylic sheets, using the automatic raising and sliding transfer device for cast acrylic sheets as described in any one of claims 1 to 9, characterized in that... Includes the following steps: S1. The acrylic sheet is conveyed to the upper surface of the sliding tray (3), and the two lateral limiting plates (501) restrict the lateral displacement of the acrylic sheet until the front end of the acrylic sheet abuts against the longitudinal limiting block (502). S2. The first position sensor (503) detects that the acrylic plate has been delivered to the position and sends out a first position signal. The second position sensor (504) detects that the acrylic plate has been placed stably on the lifting tray (403) and sends out a second position signal. S3. After the controller receives the first positioning signal and the second positioning signal at the same time, it controls the lifting cylinders (401) in the two sets of automatic lifting components (4) to extend synchronously, and drives the two lifting pallets (403) to move vertically upward along the guide column (402) to smoothly lift the acrylic plate from the sliding pallet (3). S4. During the lifting process, the pressure sensor (404) feeds back the pressure value to the controller in real time. The controller controls the two sets of lifting cylinders (401) to stop according to the pressure signal, thus completing the automatic lifting of the acrylic plate.

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