A hot press forming production system

Abstract

The application discloses a hot press forming production system, which comprises the following automatic processes: feeding and preliminary positioning, drying and shaping, visual correction, stamping, transfer and product discharging. After manual feeding, a limiting rod completes rough positioning of the sheet, and a mechanical arm sends the sheet into a closed drying box for constant-temperature stress relief; a CCD visual detection calculates the deviation of the sheet in the direction of displacement and the angle deviation, and a transplanting structure automatically corrects the position; a mold can be pre-adjusted for alignment, and the corrected sheet is sent into a stamping equipment for mold processing. After stamping is completed, an upper mold needle structure automatically separates the sheet, a translation moving platform supports and transfers, and a mechanical arm conveys the sheet to a conveying belt for discharging. The whole process uses a spring buffer needle assembly to transfer the sheet, the blunt needle prevents the sheet from being damaged, and drying, visual correction and automatic stripping cooperate to solve the problems of manual positioning deviation, sheet deformation and stripping scratch. The application integrates full-process automation, has high stamping positioning precision, reduces manual intervention, and improves the stamping production efficiency of the storage box and the yield of finished products.

Description

Technical Field

[0001] This invention relates to the field of storage box embossing production technology, specifically to a hot pressing molding production system. Background Technology

[0002] Box-type storage products often feature embossing processes to enhance their visual appeal and recognizability, resulting in patterns, textures, or logos. Currently, embossing production of storage boxes typically employs a decentralized process layout, with each step—feeding, drying, embossing, and unloading—being independently set up. This requires manual transfer of sheets at each station, leading to low production efficiency and high labor costs. Furthermore, manual loading and unloading relies on operator experience for sheet positioning, resulting in inconsistent positioning accuracy and a high risk of defects such as embossing misalignment and texture misalignment, making it difficult to guarantee product yield.

[0003] Meanwhile, if the sheet material is damp or has internal stress before printing, it is prone to shrinkage and deformation after printing, affecting the quality of the finished product. However, most existing production lines lack a pre-drying and shaping process, or the drying process is not well integrated with the printing process, making it impossible to match the pace of automated production. In addition, after printing, the sheet material is prone to sticking to the lower mold, and manual unloading can easily cause the sheet material to bend and scratch the surface, further affecting the finished product qualification rate and production efficiency. Summary of the Invention

[0004] To address the shortcomings mentioned in the background art, the present invention provides a hot pressing molding production system.

[0005] To solve the above-mentioned technical problems, the technical solution provided by the present invention is: a hot pressing molding production system, characterized in that: it includes a drying oven, a feeding mechanism, a detection and transfer device, a first picking and placing robotic arm, an imprinting device, a pallet storage structure, a conveyor belt structure, and a second picking and placing robotic arm. The system operates in a visual positioning and hot pressing molding coordinated control mode, including the following steps: Step S1, Initial Positioning of Material Loading: Place the imprinting sheet to be processed on the manual feeding platform of the feeding mechanism, and use the limiting rods arranged on the outside of the feeding platform to initially limit the position of the sheet. Step S2, Drying and Shaping: The pre-positioned imprinted sheet is transferred to the drying chamber of the drying box by the first loading and unloading robotic arm, and the sealing cover of the drying box is closed to dry and shape the imprinted sheet. Step S3, Visual Inspection and Position Correction: After drying, the sealing cover is opened, and the first material handling robot arm transfers the dried imprinted sheet to the inspection placement position of the inspection and transfer equipment. The visual detector set below the inspection placement position collects the sheet position image and calculates the position offset and angle deviation. The inspection and transfer equipment adjusts the material handling posture through the transfer structure set on the top of the inspection and transfer equipment according to the deviation data, and completes the automatic correction of the sheet position. The visual detector detects whether there are missing corners, scratches or deformation defects on the surface of the sheet while acquiring the position image of the sheet. When a defect is detected, the control system marks the sheet and transmits the defect information to the imprinting equipment in step S5. The imprinting equipment skips the imprinting process of the sheet or reduces the mold closing pressure according to the defect information to avoid forming waste products after imprinting.

[0006] Step S4, Imprinting and Feeding: The inspection and transfer equipment accurately transfers the corrected imprinting sheet to the lower mold fixing plate set inside the imprinting equipment through the transfer structure; Step S5, Imprinting Process: The imprinting equipment has an upper mold support structure that drives the lifting mechanism to close the upper mold in the upper mold support structure with the lower mold in the lower mold fixing plate, thus completing the imprinting process of the imprinted sheet. Step S6, Post-Imprint Transfer and Acceptance: After imprinting, the needle-punching material-taking structure on the upper mold support structure inserts into the imprinted sheet and rises synchronously with the upper mold support structure, separating the sheet from the lower mold; the pallet storage structure moves the moving platform to below the upper mold support structure by setting a translation cylinder, the needle-punching material-taking structure retracts to make the imprinted sheet fall onto the moving platform, and the moving platform returns to its original position; Step S7, Finished Product Discharge: The second picking and unloading robotic arm transfers the imprinted finished product on the moving platform to the conveyor belt structure, and the finished product is output outward from the conveyor belt structure; In step S3, the position offset and angle deviation data collected by the visual detector are synchronously fed back to the control system of the embossing equipment. The control system dynamically adjusts the downward stroke of the upper mold support structure and the mold closing position compensation amount in step S5 according to the deviation data, forming a coordinated control between visual positioning and hot pressing. The picking and placing paths and action rhythms of the first picking and placing robotic arm, the second picking and placing robotic arm, and the transfer structure are coordinated by the control system according to the detection cycle of the vision detector, the printing cycle of the printing equipment, and the drying cycle of the drying box, so that the feeding, drying, vision detection, printing, transfer and receiving and finished product discharge processes form a rhythm-matched flow operation sequence.

[0007] Furthermore, in step S2, the sealing cover of the drying chamber is driven to flip by the first cylinder through the hinge arm, thereby realizing the automatic opening and closing of the drying chamber; After the sealing cover is closed, the drying chamber is in a sealed state, and the imprinted sheet is dried and shaped at a constant temperature.

[0008] Furthermore, both the first and second picking and placing robotic arms are multi-degree-of-freedom joint robotic arms, which cover the corresponding workstations and complete the picking, placing and transferring of sheet materials through horizontal rotation, multi-arm pitch swing and end-effector rotation adjustment.

[0009] Furthermore, in step S3, the visual detector is a CCD visual inspection component. After the sheet position image it acquires is processed by the built-in visual algorithm to extract the sheet edge features, it is compared with a preset standard template to calculate the position offset in the X / Y direction and the rotation angle deviation around the vertical axis. The transplanting structure synchronously adjusts the horizontal material picking coordinates and the end rotation angle according to the calculated deviation data, and completes the deviation compensation during the transfer process from material picking to material unloading.

[0010] Furthermore, in step S6, the needle-punching material-taking structure includes a third cylinder and a second needle-punching structure. The third cylinder drives the second needle-punching structure to rise and fall. After the imprinting is completed, the third cylinder pushes the second needle-punching structure down along the limiting cylinder. The needle passes through the imprinted sheet and is embedded in the limiting hole of the lower mold fixing plate. Then the third cylinder retracts and drives the sheet to detach from the surface of the lower mold.

[0011] Furthermore, in step S6, the moving platform is driven by a translation cylinder to move horizontally back and forth along a linear slide rail; a baffle is set on the outer side of the top of the moving platform to limit the position of the falling imprinted sheet and prevent the sheet from slipping and deviating.

[0012] Furthermore, in steps S2, S3, and S7, the material handling robotic arm and the transfer structure both employ needle-punching structures to complete the handling and transfer of the sheet material. The needle-punching structure includes a mounting bracket, a second cylinder drive, and a first needle-punching structure. The second cylinder drive drives the first needle-punching structure to extend and retract. A spring and a limiting extension rod are provided between the second cylinder drive and the mounting bracket. When picking up the material, the spring compression provides buffering to ensure uniform needle penetration depth.

[0013] Furthermore, before step S4, a mold alignment adjustment step is included: loosening the locking bolts of the upper mold adjustment block and the lower mold adjustment block, moving the upper mold structure and the lower mold structure along the adjustment groove, adjusting the relative imprinting position of the upper and lower molds, and fixing the locking bolts after alignment is completed.

[0014] The advantages of this invention compared with the prior art are: 1. Full-process automated integration: It integrates processes such as feeding and positioning, drying and shaping, visual correction, printing and processing, and transfer and unloading into one system. The automatic connection between processes is achieved through robotic arms and transfer structures, eliminating the need for manual transfer at each workstation, greatly improving production efficiency and reducing manual labor intensity and labor costs.

[0015] 2. Two-stage positioning ensures printing accuracy: By combining coarse positioning with front-end limiting rods with subsequent precise CCD vision correction, and with the mold alignment fine-tuning structure, high-precision control of the sheet printing position is achieved, effectively avoiding defects such as printing misalignment and texture misalignment, and improving product yield.

[0016] 3. Buffer-type needle punching ensures stable and reliable material handling: The entire sheet transfer process adopts a needle punching structure with spring buffer to ensure that the needle penetration depth is uniform and consistent. This avoids puncturing and damaging the sheet, and ensures that the sheet does not fall off or shift during the transfer process, making it suitable for the gentle transfer needs of thin decorative sheets.

[0017] 4. Pre-press sealing drying improves quality: A sealed constant temperature drying process is set up before printing to effectively eliminate internal stress and moisture in the sheet, avoid problems such as sheet shrinkage, deformation and unclear texture after printing, and improve the stability and consistency of finished product quality.

[0018] 5. Smooth automatic unloading and transfer: After the stamping is completed, the unloading is completed simultaneously through the needle punching structure on the upper mold side. The transfer is carried out by the translational moving platform, avoiding the bending and scratching of the sheet caused by manual unloading. At the same time, it realizes the seamless connection between the stamping process and the unloading process, matching the automated production cycle. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a hot pressing molding production system.

[0020] Figure 2 This is a schematic diagram of the structure of a testing and transfer device in a hot pressing molding production system.

[0021] Figure 3 This is a schematic diagram of the first material handling robotic arm in a hot pressing molding production system.

[0022] Figure 4 This is a schematic diagram of the second material handling robotic arm in a hot pressing molding production system.

[0023] Figure 5 This is a schematic diagram of a pallet storage structure in a thermoforming production system.

[0024] Figure 6 This is a schematic diagram of the first needle-punching structure of a hot-pressing molding production system.

[0025] Figure 7 A schematic diagram of a mold structure for a hot pressing molding production system Figure 1 .

[0026] Figure 8 A schematic diagram of a mold structure for a hot pressing molding production system Figure 2 .

[0027] Figure 9 A schematic diagram of the lower mold fixing plate structure of a thermoforming production system. Figure 1 .

[0028] Figure 10 A schematic diagram of the upper mold support structure of a hot pressing molding production system. Figure 2 .

[0029] Figure 11 A schematic cross-sectional view of the lower mold fixing plate of a thermoforming production system. Figure 1 .

[0030] Figure 12 A cross-sectional view of the upper mold support structure of a hot pressing molding production system. Figure 2 .

[0031] As shown in the figure: 1. Drying oven; 2. Feeding mechanism; 3. Inspection and transfer equipment; 4. First picking and unloading robotic arm; 5. Imprinting equipment; 6. Pallet storage structure; 7. Conveyor belt structure; 8. Second picking and unloading robotic arm; 9. Drying chamber; 10. Sealing cover; 11. Hinge arm; 12. First cylinder; 13. Lower mold fixing plate; 14. Upper mold support structure; 15. Manual feeding platform; 16. Second cylinder; 17. First needle punching structure; 18. Spring; 19. Limiting telescopic rod; 20. Third cylinder; 21. Second needle punching structure; 22. Vision detector; 23. Transfer structure. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0033] The specific embodiment is as follows: It includes a drying box and a feeding mechanism for placing the imprinting sheet. The drying box is provided with a detection and transfer device on its side. A first picking and placing mechanical arm is provided between the drying box, the feeding mechanism and the detection and transfer device. The first picking and placing mechanical arm is driven by a second transfer structure. The first picking and placing mechanical arm and the second transfer structure cooperate to transfer the imprinting sheet from the feeding mechanism to the drying box and then to the detection and transfer device. The aforementioned inspection and transplanting equipment is equipped with an imprinting device at its rear. The inspection and transplanting equipment is driven by a first transfer structure. The imprinting device is equipped with a tray storage structure on its outer side. The tray storage structure is equipped with a conveyor belt structure on its outer side. A second picking and placing robotic arm is located between the tray storage structure and the conveyor belt structure. The second picking and placing robotic arm is driven by a third transfer structure. The inspection and transplanting equipment, in conjunction with the first transfer structure, transfers the imprinted sheet to the imprinting device. The tray storage structure transfers the imprinted sheet outward from the imprinting device. The second picking and placing robotic arm, in conjunction with the third transfer structure, transfers the imprinted sheet from the tray storage structure to the conveyor belt structure.

[0034] The feeding mechanism includes an equipment cabinet. The top of the equipment cabinet is equipped with a manual feeding platform and a control panel. Limiting rods are located on the outside of the manual feeding platform on the top of the equipment cabinet. The manual feeding platform is used by operators to place the imprinting sheet to be processed. Multiple limiting rods are arranged along the outline of the sheet to initially limit the position of the sheet and reduce the offset of manual placement. The control panel integrates equipment start / stop, parameter adjustment, and workstation status display functions to facilitate operators to manage equipment operation.

[0035] The drying oven has a drying chamber inside. A sealing cover that matches the drying chamber is hinged to the outside of the drying oven. Hinged arms are hinged to both sides of the drying oven and both sides of the sealing cover. A first cylinder is hinged to both sides of the drying oven. The power end of the first cylinder is hinged to the hinged arms. When the first cylinder extends or retracts, it drives the sealing cover to rotate around the hinge axis through the hinged arms, realizing the automatic opening and closing of the drying chamber. The drying chamber has a built-in heating structure to dry and shape the placed imprinted sheet. After the sealing cover is closed, it ensures that the inside of the drying chamber is sealed, improving drying efficiency and temperature stability. The first cylinder can ensure the overall automation efficiency of the equipment.

[0036] The aforementioned inspection and transfer equipment includes a main frame with an inspection placement position at the top. A vision detector, a CCD vision inspection component, is installed inside the main frame to align with the inspection placement position. After the sheet is placed at the inspection placement position, the CCD vision inspection captures an image of the sheet's position, compares it with a preset standard position to calculate the offset and angle deviation, and then the transfer robot of the inspection and transfer equipment adjusts the material handling posture to precisely move the sheet onto the imprinting mold. The transfer robot includes a first drive group fixedly mounted on one side of the main frame. The power end of the first drive group drives a rotating support arm, which can rotate in a horizontal plane to achieve horizontal transfer between workstations. A second drive group is located at the top of the rotating support arm, containing a servo motor whose power end is connected to the top of the rotating support arm. The servo motor can precisely control the rotation angle, driving the rotating support arm for further angle adjustment. The end of the second drive group drives a screw lifting structure fixedly connected to the first transfer structure. The screw lifting structure is a common electric worm gear assembly combined with a screw transmission structure, which can drive the first transfer structure to vertically lift and lower, completing the height actions of material handling and placement.

[0037] Both the first and second material handling robotic arms are multi-degree-of-freedom joint robotic arms with identical structures, each including a base. A rotating seat is rotatably mounted on the top of the base. A third drive group drives the rotating seat to rotate, enabling the overall horizontal rotation of the robotic arm. A support frame is mounted on the top of the rotating seat. A first arm is rotatably mounted on one side of the support frame. A fourth drive group drives the first arm to rotate, controlling its pitch and swing. A fifth drive group is located on the inner side of the first arm's end, with its power end connected to the first arm, driving a second arm to swing relative to it. A fixed frame is located on the outer side of the fifth drive group, with the second arm located on the outer side of the fixed frame. A sixth drive group is located at the end of the second arm. A seventh drive group is rotatably mounted on the inner side of the sixth drive group, with its power end fixedly connected to the second and third transfer structures. The sixth and seventh drive groups work together to achieve rotation and attitude adjustment of the end-effector transfer structures, allowing the robotic arm to cover multiple workstations and flexibly complete material handling actions at different positions.

[0038] The embossing equipment includes a hydraulic frame, which comprises an upper mold support structure and a lower mold fixing plate. The lower mold fixing plate is used to fix the lower embossing mold and support the sheet to be embossed. The top of the hydraulic frame is equipped with a hydraulic cylinder that drives the upper mold support structure to rise and fall. The upper mold support structure is used to install the upper embossing mold, and the hydraulic cylinder drives it to press down to complete the embossing process. The top of the upper mold support structure is equipped with multiple third cylinders, and the bottom power end of the third cylinder is equipped with a second needle-punching structure. The second needle-punching structure rises and falls synchronously with the upper mold support structure. After embossing, it can pierce the sheet and lift it up together with the upper mold to separate the sheet from the lower mold.

[0039] The upper mold support structure is provided with a fixed plate, an adjustment plate and a limiting plate that are fixedly connected to each other from top to bottom. The top of the fixed plate is provided with multiple connecting limiting blocks, which are used to fix the upper mold support structure to the upper worktable of the press. The upper mold support structure is provided with multiple needle-punching material picking structures that are evenly distributed.

[0040] The needle-punching material-taking structure includes a third cylinder fixedly mounted on the top of the fixed plate and a limiting cylinder mounted on the bottom of the limiting plate. The power end of the bottom of the third cylinder is provided with a second needle-punching structure extending into the limiting cylinder. The lower mold fixed plate is provided with a limiting hole aligned with the limiting cylinder. After the imprinting action is completed, the third cylinder is activated, pushing the second needle-punching structure to move downward along the limiting cylinder. The needle passes through the imprinted material and pierces into the limiting hole. Then the cylinder retracts, and the needle hooks the material and pulls it out from the surface of the lower mold, thus achieving auxiliary material taking. The limiting cylinder and the limiting hole together ensure that the needle descends vertically, avoiding skew damage to the mold.

[0041] Combined with appendix Figure 7-12 The adjustment plate and the limiting plate are provided with an upper mold mounting groove at the bottom. An adjustable upper mold structure is installed in the upper mold mounting groove. The lower mold fixing plate is provided with a lower mold mounting groove at the top corresponding to the upper mold mounting groove. An adjustable lower mold structure is installed in the lower mold mounting groove. Both the upper and lower mold mounting grooves are grooves opened for the corresponding upper and lower molds, which facilitates the loading of the mold.

[0042] The upper mold structure includes a mold connecting plate that slides within an upper mold mounting groove. The mold connecting plate is bolted to the upper mold. Upper mold adjusting blocks are located at both ends of the mold connecting plate. The limiting plate has an upper mold adjusting groove that mates with the upper mold adjusting blocks. The upper mold adjusting groove is an elongated groove extending laterally along the mounting groove. The upper mold adjusting blocks are embedded within it and can slide along the groove. A first adjusting bolt opening is located at the bottom of the upper mold adjusting groove. The upper mold adjusting blocks have a first bolt hole that mates with the first adjusting bolt opening. The inner sides of the adjusting plate and the limiting plate share a first limiting cavity that mates with the first adjusting bolt opening. A first fastener is slidably positioned within the first limiting cavity. The first fastener has a second bolt hole that mates with the first adjusting bolt opening and the first bolt hole. During assembly, the bolts are passed sequentially through the first adjusting bolt opening, the first bolt hole, and then screwed into the second bolt hole to lock the upper mold adjusting blocks within the upper mold adjusting groove. After loosening the bolts, the upper mold adjusting blocks can slide along the groove, thereby causing the entire upper mold to translate relative to the limiting plate, achieving upper mold position adjustment.

[0043] The lower mold structure includes a lower mold, with lower mold adjusting blocks bolted to both ends. The lower mold fixing plate has a lower mold adjusting groove that mates with the lower mold adjusting blocks. The lower mold adjusting groove is an elongated groove extending laterally along the mounting groove. A second adjusting bolt opening is located at the bottom of the lower mold adjusting groove. The lower mold adjusting block has a third bolt hole that mates with the second adjusting bolt opening. A second limiting cavity that mates with the second adjusting bolt opening is located inside the lower mold fixing plate. A second fastener is slidably positioned within the second limiting cavity. The second fastener has a fourth bolt hole that mates with the second adjusting bolt opening and the third bolt hole. Similarly, by passing bolts through the second adjusting bolt opening, the third bolt hole, and locking them into the fourth bolt hole, the lower mold adjusting block can be fixed within the lower mold adjusting groove. After loosening the bolts, the lower mold adjusting block can slide along the groove, allowing for fine-tuning of the lower mold's horizontal position for precise alignment with the upper mold.

[0044] The pallet storage structure includes a pallet support, a fixed platform at the top of the pallet support, a movable platform at the top of the fixed platform, translation cylinders on both sides of the fixed platform to drive the movable platform to move laterally, a linear slide rail between the fixed platform and the movable platform, and the translation cylinders to drive the movable platform to move horizontally back and forth along the linear slide rail on the fixed platform; a baffle is provided on the outer side of the top of the movable platform to limit the falling sheet and prevent the sheet from slipping and deviating.

[0045] After the embossing equipment completes the embossing, the third cylinder drives the second needle-punching structure to penetrate the embossed sheet, and the hydraulic cylinder drives the upper mold support structure to rise, simultaneously lifting the sheet. The translation cylinder drives the moving platform to move directly below the upper mold support structure, and the third cylinder drives the second needle-punching structure to retract. After the sheet loses its binding force, it falls into the moving platform, and the baffle restricts the position of the sheet. Subsequently, the translation cylinder drives the moving platform to retract to its original position, and the material is moved to the conveyor belt structure for outward transmission by the second loading and unloading robotic arm in conjunction with the third transfer structure.

[0046] The first, second, and third transfer structures are identical in structure, all including a fixed bracket. The bottom of the fixed bracket is equipped with multiple second cylinders, and the power end of each second cylinder has a first needle-piercing structure. During material handling, the third cylinder drives the first needle-piercing structure downwards, and the needle tip pierces the sheet material, thus transferring the sheet. After transferring to the target station, the third cylinder drives the first needle-piercing structure upwards, disengaging the needle tip from the sheet, completing the material release. The top of the third cylinder is equipped with a limiting telescopic rod that limits the lifting and lowering of the fixed bracket. The top of the fixed bracket is equipped with a limiting sleeve that cooperates with the limiting telescopic rod, ensuring that the third cylinder floats only in the vertical direction. A spring is provided between the top of the third cylinder and the fixed bracket, sleeved on the outside of the limiting telescopic rod. When the transfer structure presses down to pick up the material, the spring is compressed, generating a buffer force, allowing the first needle-piercing structure to flexibly contact the sheet, ensuring uniform penetration depth and avoiding puncturing the sheet or incomplete removal.

[0047] Combined with appendix Figure 1-8 A hot pressing molding production system, characterized by comprising: a drying chamber 1, a feeding mechanism 2, a detection and transfer device 3, a first material handling robotic arm 4, an imprinting device 5, a pallet storage structure 6, a conveyor belt structure 7, and a second material handling robotic arm 8, wherein the system operates in a visual positioning and hot pressing molding coordinated control mode, and includes the following steps: Step S1, Initial Positioning: Place the imprinting sheet to be processed on the manual feeding platform 15 of the feeding mechanism 2. The sheet is initially positioned by the limiting rods arranged on the outside of the feeding platform. The limiting rods are arranged at right angles along the two adjacent sides of the manual feeding platform 15. The sheet is roughly positioned by pressing it against the two limiting rods. The bottom of the limiting rods is fixed to the T-shaped adjustment groove on the surface of the feeding platform by bolts. Loosening the bolts allows the spacing to be adjusted by moving along the adjustment groove to accommodate imprinting sheets of different lengths and widths.

[0048] Step S2, Drying and Shaping: The first loading and unloading robotic arm 4 transfers the pre-positioned imprinted sheet into the drying chamber 9 of the drying box 1, and closes the sealing cover 10 of the drying box 1 to dry and shape the imprinted sheet; the drying chamber 9 is equipped with an electric heating tube and a temperature sensor, which, together with the temperature control module, achieves constant temperature control. The drying temperature can be set to 60-80℃ according to the sheet material. Drying in a closed environment is more uniform, which can effectively remove moisture from the surface of the sheet and release internal stress, avoiding deformation after imprinting; The sealing cover of the drying chamber 1 is driven to flip by the first cylinder 12 through the hinge arm 11, realizing the automatic opening and closing of the drying chamber 9. One end of the hinge arm 11 is fixedly connected to the side of the sealing cover 10, and the other end is hinged to the upper part of the body of the drying chamber 1. The cylinder body of the first cylinder 12 is hinged to the lower part of the side wall of the body, and the end of the piston rod is hinged to the middle of the hinge arm 11. When the piston rod extends, it pushes the hinge arm 11 to flip upward, driving the sealing cover 10 to open. When the piston rod retracts, it pulls the hinge arm 11 to flip downward, driving the sealing cover 10 to close. The entire opening and closing process is smooth and without impact. After the sealing cover 10 is closed, the drying chamber 9 is in a sealed state, and the printing sheet is dried and shaped at a constant temperature.

[0049] Step S3, Visual Inspection and Position Correction: After drying, the sealing cover is opened, and the first material handling robot arm 4 transfers the dried imprinted sheet to the inspection placement position of the inspection and transfer device 3. The visual detector 22 set below the inspection placement position collects the sheet position image and calculates the position offset and angle deviation. The inspection and transfer device 3 adjusts the material handling posture through the transfer structure 23 set on the top of the inspection and transfer device 3 according to the deviation data, and completes the automatic correction of the sheet position. The visual detector 22 detects whether there are corner defects, scratches or deformation defects on the surface of the sheet while acquiring the position image of the sheet. When a defect is detected, the control system marks the sheet and transmits the defect information to the imprinting device 5 in step S5. The imprinting device 5 skips the imprinting process of the sheet or reduces the mold closing pressure according to the defect information to avoid forming waste products after imprinting.

[0050] The visual detector 22 is a CCD visual detection component. After the sheet position image it collects is extracted by the built-in visual algorithm to extract the sheet edge features, it is compared with the preset standard template to calculate the position offset in the X / Y direction and the rotation angle deviation around the vertical axis. The transplanting structure (23) adjusts the horizontal material picking coordinate and the end rotation angle synchronously according to the calculated deviation data, and completes the deviation compensation during the transfer process from material picking to material release.

[0051] Step S4, Imprinting and Feeding: The inspection and transfer device 3 accurately transfers the corrected imprinting sheet to the lower mold fixing plate 13 set in the imprinting device 5 through the transfer structure 23; the surface of the lower mold fixing plate 13 is provided with a micro-concave positioning surface that matches the contour of the sheet, which can limit horizontal movement after the sheet is placed, and provide a stable reference for mold closing and imprinting.

[0052] Step S5, Imprinting Process: The imprinting equipment 5 is equipped with an upper mold support structure 14, which drives the upper mold in the upper mold support structure 14 to close with the lower mold in the lower mold fixing plate 13, thus completing the imprinting process of the imprinted sheet. The imprinting equipment 5 is driven by a servo electric cylinder or hydraulic system. The downward stroke and imprinting pressure can be digitally adjusted. After the mold is closed, the pressure is maintained for a set time to ensure that the imprinted texture is clear and full. Guide columns are set on both sides of the upper mold support structure 14, which run vertically along the guide sleeve on the frame to ensure the parallelism and centering of the upper and lower molds.

[0053] Step S6, Post-Imprint Transfer and Acceptance: After imprinting is completed, the needle-punching material-taking structure on the upper mold support structure 14 inserts into the imprinted sheet and rises synchronously with the upper mold support structure 14, so that the sheet is separated from the lower mold. The pallet storage structure 6 uses a translation cylinder 25 to move the moving platform 24 to the lower part of the upper mold support structure 14. The needle-punching material picking structure retracts to make the imprinted sheet fall onto the moving platform, and the moving platform returns to its original position. The receiving surface of the mobile platform 24 can be equipped with anti-slip silicone pads to cushion and protect the falling sheets, preventing the sheets from being bumped and indented. The platform is equipped with baffles on three sides, leaving only the opening on the side where the robotic arm picks up the material, to limit the range of sheet slippage and ensure that the sheet stays in a consistent position. The needle-punching material-taking structure includes a second needle-punching structure 21 driven by a third cylinder 20. The needles of the second needle-punching structure 21 are arranged in a multi-row, multi-column array and correspond one-to-one with the positions of the limiting holes on the lower mold fixing plate 13. After the imprinting is completed, the third cylinder 20 pushes the second needle-punching structure 21 downward along the limiting cylinder. The needles pass through the imprinted sheet and are embedded in the limiting holes of the lower mold fixing plate 13. Then, the third cylinder 20 retracts, causing the sheet to detach from the surface of the lower mold. The tips of the needles are blunt and rounded so that they will not tear the sheet when they penetrate. The penetration depth is limited by the limiting cylinder to avoid puncturing the sheet and damaging the imprinted surface. The moving platform is driven by a translation cylinder to move horizontally back and forth along a linear slide rail. A baffle is set on the outer side of the top of the moving platform to limit the position of the falling imprinted sheet and prevent the sheet from slipping and deviating.

[0054] Step S7, Finished Product Discharge: The second picking and unloading robotic arm 8 transfers the stamped finished product on the moving platform to the conveyor belt structure 7, and the conveyor belt structure 7 outputs the finished product outward. The conveyor belt structure 7 adopts an anti-static flat belt, which is driven by a geared motor to run at a uniform speed. The conveying speed can be adjusted according to the production rhythm. The finished product is placed in the central area of ​​the belt and stably conveyed to the next station or receiving area.

[0055] Both the first picking and placing robotic arm 4 and the second picking and placing robotic arm 8 are multi-degree-of-freedom joint robotic arms. Through horizontal rotation, multi-arm pitch swing and end-effector rotation adjustment, they cover the corresponding workstations and complete the picking and placing of sheet materials. The motion path and action rhythm of the robotic arms can be programmed and set by the control system to flexibly adapt to different workstation layouts and production rhythms.

[0056] In step S3, the position offset and angle deviation data collected by the visual detector 22 are synchronously fed back to the control system of the imprinting equipment 5. The control system dynamically adjusts the downward stroke and mold closing position compensation of the upper mold support structure 14 in step S5 according to the deviation data, forming a coordinated control between visual positioning and hot pressing. The picking and placing paths and action rhythms of the first picking and placing robotic arm 4, the second picking and placing robotic arm 8, and the transfer structure 23 are coordinated by the control system according to the detection cycle of the vision detector 22, the printing cycle of the printing equipment 5, and the drying cycle of the drying box 1, so that the feeding, drying, vision detection, printing, transfer and receiving and finished product discharge processes form a rhythm-matched flow operation sequence.

[0057] In steps S2, S3, and S7, both the material handling robotic arm and the transfer structure 23 employ needle-punching structures to complete the handling and transfer of the sheet material. The needle-punching structure includes a mounting bracket, a second cylinder drive 16, and a first needle-punching structure 17. The second cylinder drive 16 drives the first needle-punching structure 17 to extend and retract. A spring 18 and a limiting telescopic rod 19 are installed between the second cylinder drive 16 and the mounting bracket. During material handling, the spring 18 is compressed to provide buffering and ensure uniform needle penetration depth. The limiting telescopic rod 19 is coaxially inserted inside the spring 18, which can both guide the extension and retraction of the spring to prevent bending and deformation of the spring and limit the maximum compression to prevent excessive needle penetration and damage to the sheet material.

[0058] Before step S4, a mold alignment adjustment step is included: loosening the locking bolts of the upper mold adjustment block and the lower mold adjustment block, translating the upper mold structure and the lower mold structure along the adjustment groove, adjusting the relative imprinting positions of the upper and lower molds, and fixing the locking bolts after alignment; the adjustment groove is a long strip-shaped slotted hole, and the specific method is described in the following embodiment: First, the fixing plate is fixed to the upper worktable of the hydraulic press by connecting the limiting blocks, and the lower mold fixing plate is fixed to the lower worktable of the hydraulic press. Then, the upper mold is connected to the mold connecting plate by bolts, and the upper mold adjusting blocks at both ends of the mold connecting plate are respectively installed into the upper mold adjusting grooves. The first fastener is installed into the first limiting cavity, and the bolts are tightened to initially fix the upper mold adjusting blocks. Similarly, the lower mold is connected to the lower mold adjusting block by bolts, and the lower mold adjusting block is installed into the lower mold adjusting groove. The second fastener is installed into the second limiting cavity, and the bolts are tightened to initially fix it.

[0059] Next, drive the hydraulic press to lower the upper mold support structure and observe whether the imprinting positions of the upper and lower molds are aligned. If adjustment is needed, loosen the corresponding locking bolts and push the mold connecting plate or lower mold adjusting block along the direction of the adjustment groove to move the upper and lower molds relative to each other in the horizontal plane until they are aligned with the desired imprinting position. Then, retighten the bolts. Since the adjustment groove is a long groove, the adjustment range can cover the deviations of common models.

[0060] After adjustment, place the fabric or leather to be imprinted onto the lower mold and start the press to imprint. After imprinting, the third cylinder actuates, driving the second needle-punching structure downward through the limiting cylinder, piercing the fabric and entering the limiting hole. Then the cylinder retracts, and the barbs or rough ends of the needles lift the fabric from the surface of the lower mold, completing the material removal. Then the next work cycle begins.

[0061] When it is necessary to change the mold model, simply loosen the locking bolts on the upper mold adjusting block and the lower mold adjusting block, remove the mold connecting plate along with the upper mold fixed on it from the upper mold mounting slot, and at the same time remove the lower mold along with the lower mold adjusting block from the lower mold mounting slot. Then, install the new mold assembly and adjust the alignment according to the above steps. There is no need to disassemble large structures such as the fixing plate, adjusting plate and limiting plate, which significantly saves mold change time.

[0062] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A hot pressing molding production system, characterized in that: The system includes a drying oven (1), a feeding mechanism (2), a detection and transfer device (3), a first picking and unloading robotic arm (4), an imprinting device (5), a pallet storage structure (6), a conveyor belt structure (7), and a second picking and unloading robotic arm (8). The system operates using a visual positioning and thermoforming collaborative control method, and includes the following steps: Step S1, Initial positioning of the material: Place the imprinting sheet to be processed on the manual feeding platform (15) of the feeding mechanism (2), and initially limit the position of the sheet by the limiting rod arranged on the outside of the feeding platform; Step S2, Drying and Shaping: The imprinted sheet after preliminary positioning is transferred to the drying chamber (9) of the drying box (1) by the first material handling robot arm (4), and the sealing cover (10) of the drying box (1) is closed to dry and shape the imprinted sheet; Step S3, Visual Inspection and Position Correction: After drying, the sealing cover is opened and the first loading and unloading robotic arm (4) transfers the dried imprinted sheet to the inspection placement position of the inspection and transfer equipment (3). The visual detector (22) set below the inspection placement position collects the sheet position image and calculates the position offset and angle deviation. The inspection and transfer equipment (3) adjusts the material picking posture of the transfer structure (23) set on the top of the inspection and transfer equipment (3) according to the deviation data, and completes the automatic correction of the sheet position. The visual detector (22) detects whether there are missing corners, scratches or deformation defects on the surface of the sheet while acquiring the position image of the sheet. When a defect is detected, the control system marks the sheet and transmits the defect information to the imprinting device (5) in step S5. The imprinting device (5) skips the imprinting process of the sheet or reduces the mold closing pressure according to the defect information to avoid forming waste after imprinting. Step S4, Imprinting and feeding: The inspection and transfer equipment (3) accurately transfers the corrected imprinting sheet to the lower mold fixing plate (13) set in the imprinting equipment (5) through the transfer structure (23); Step S5, Imprinting: The imprinting equipment (5) is driven to lift and is equipped with an upper mold support structure (14), so that the upper mold in the upper mold support structure (14) and the lower mold in the lower mold fixing plate (13) are closed to complete the imprinting process of the imprinting sheet. Step S6, Transfer and Acceptance after Imprinting: After imprinting is completed, the needle-punching material picking structure on the upper mold support structure (14) inserts into the imprinted sheet and rises synchronously with the upper mold support structure (14), so that the sheet is separated from the lower mold; the tray storage structure (6) drives the moving platform (24) to move to below the upper mold support structure (14) by setting the translation cylinder (25), the needle-punching material picking structure retracts so that the imprinted sheet falls onto the moving platform, and the moving platform returns to its original position; Step S7, Finished product output: The imprinted finished product on the moving platform is transferred to the conveyor belt structure (7) by the second picking and placing robotic arm (8), and the finished product is output to the outside by the conveyor belt structure (7); In step S3, the position offset and angle deviation data collected by the visual detector (22) are synchronously fed back to the control system of the imprinting equipment (5). The control system dynamically adjusts the downward stroke and mold closing position compensation of the upper mold support structure (14) in step S5 according to the deviation data, forming a coordinated control between visual positioning and hot pressing. The picking and placing paths and action rhythms of the first picking and placing robotic arm (4), the second picking and placing robotic arm (8), and the transfer structure (23) are coordinated by the control system according to the detection cycle of the vision detector (22), the printing cycle of the printing equipment (5), and the drying cycle of the drying box (1), so that the feeding, drying, vision detection, printing, transfer and receiving and finished product discharge processes form a rhythm-matched flow operation sequence.

2. The hot pressing molding production system according to claim 1, characterized in that: In step S2, the sealing cover (10) of the drying box (1) is driven to flip by the first cylinder (12) through the hinge arm (11) to realize the automatic opening and closing of the drying chamber (9); After the sealing cover (10) is closed, the drying chamber (9) is in a closed state, and the imprinted sheet is dried and shaped at a constant temperature.

3. The hot pressing molding production system according to claim 1, characterized in that: Both the first picking and placing robotic arm (4) and the second picking and placing robotic arm (8) are multi-degree-of-freedom joint robotic arms. Through horizontal rotation, multi-arm pitch swing and end-effector rotation adjustment, they cover the corresponding workstations and complete the picking and placing of sheet materials.

4. The hot pressing molding production system according to claim 1, characterized in that: In step S3, the visual detector (22) is a CCD visual detection component. After the sheet position image it collects is extracted by the built-in visual algorithm to extract the sheet edge features, it is compared with the preset standard template to calculate the position offset in the X / Y direction and the rotation angle deviation around the vertical axis. The transplanting structure (23) adjusts the horizontal material picking coordinate and the end rotation angle synchronously according to the calculated deviation data to complete the deviation compensation during the transfer process from material picking to material release.

5. The hot pressing molding production system according to claim 1, characterized in that: In step S6, the needle-punching material-taking structure includes a third cylinder (20) and a second needle-punching structure (21). The third cylinder (20) drives the second needle-punching structure (21) to rise and fall. After the stamping is completed, the third cylinder (20) pushes the second needle-punching structure (21) down along the limiting cylinder. The needle passes through the stamping sheet and is embedded in the limiting hole of the lower mold fixing plate (13). Then the third cylinder (20) retracts and drives the sheet to detach from the surface of the lower mold.

6. The hot pressing molding production system according to claim 1, characterized in that: In step S6, the moving platform is driven by a translation cylinder to move horizontally back and forth along a linear slide rail; a baffle is set on the outer side of the top of the moving platform to limit the position of the falling imprinted sheet and prevent the sheet from slipping and deviating.

7. The hot pressing molding production system according to claim 1, characterized in that: In steps S2, S3, and S7, the material handling robot arm and the transfer structure (23) both use a needle-punching structure to complete the handling and transfer of the sheet material; The needle-punching structure includes a mounting bracket, a second cylinder drive (16), and a first needle-punching structure (17). The second cylinder drive (16) drives the first needle-punching structure (17) to extend and retract. A spring (18) and a limiting telescopic rod (19) are provided between the second cylinder drive (16) and the mounting bracket. When picking up materials, the spring (18) is compressed to provide buffering and ensure that the needle-punching depth is uniform.

8. The hot pressing molding production system according to claim 1, characterized in that: Before step S4, a mold alignment adjustment step is also included: loosen the locking bolts of the upper mold adjustment block and the lower mold adjustment block, move the upper mold structure and the lower mold structure along the adjustment groove, adjust the relative imprinting position of the upper and lower molds, and fix the locking bolts after alignment is completed.

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