Die assembly mechanism for processing foam sandwich panel

Abstract

The utility model discloses a mold closing mechanism for processing a foam sandwich panel, which belongs to the technical field of manufacturing of vehicle accessories and comprises a lower mold, a movable upper mold frame, a pressing mold hydraulic cylinder, an upper mold and a side hooking unit, the lower die is provided with a lower die table top used for arranging a lower compartment plate, the movable upper die frame forms a horizontal movable frame body moving above the lower die table top, the die pressing hydraulic cylinder and the upper die are installed on the movable upper die frame, the die pressing hydraulic cylinder is connected with the upper die and drives the upper die to vertically move, and N side hooking units are evenly arranged on the side of the upper die in the circumferential direction. The side hooking and pulling unit is provided with a hook used for hooking the edge of the upper compartment plate and a hook claw driving component used for driving the hook to move outwards, and the side portion of the lower die is provided with a hooking and pulling part combined with the hook. According to the mold closing mechanism, by optimizing the function of the line moving upper mold assembly, the production efficiency, the operation precision and the product quality are improved, the flexibility and the environmental protection property of a system are enhanced, and an efficient, energy-saving and environment-friendly solution is provided for the refrigerator car manufacturing industry.

Description

Technical Field

[0001] This utility model belongs to the field of vehicle parts manufacturing technology, and in particular relates to a mold closing mechanism for processing foam sandwich panels. Background Technology

[0002] Currently, refrigerated truck body panels typically consist of two layers of high-strength panels sandwiching a layer of insulating foam material, forming a three-layer sandwich structure. This panel offers excellent thermal insulation, airtightness, and durability, effectively blocking external environmental interference with the interior temperature and ensuring it remains within a set range, thus guaranteeing the quality and safety of refrigerated goods. This panel design plays a crucial role in cold chain transportation, not only improving transport efficiency but also helping to reduce energy consumption and operating costs.

[0003] However, existing refrigerated truck body panel manufacturing processes have several significant problems. Traditional production methods rely on chemical adhesives to bond the three layers of materials together. This not only results in a heavier overall weight for the body panels, increasing fuel consumption and transportation costs, but also leads to increased production costs and potential environmental pollution due to the large-scale use of chemical adhesives. Furthermore, the bonding process has high requirements for equipment and operating conditions, resulting in low production efficiency. In large-scale production, bonding quality is often affected, leading to uneven bonding or material delamination, directly impacting the thermal insulation performance and service life of the body panels. Based on these problems, designing a mold-closing mechanism for processing foam sandwich panels is particularly necessary. This would reduce reliance on chemical adhesives, lower production costs, and simultaneously reduce the overall weight of the body panels, improving the vehicle's lightweight performance. Utility Model Content

[0004] To address the problems in existing technologies, such as excessive weight of the refrigerated truck body panels due to the bonding process, increased production costs due to the use of large amounts of chemical adhesives, low production efficiency, and unstable bonding quality, this utility model provides a mold closing mechanism for processing foam sandwich panels.

[0005] This utility model is implemented as follows: a mold closing mechanism for processing foam sandwich panels, characterized in that it includes a lower mold, a movable upper mold frame, a pressing hydraulic cylinder, an upper mold, and side hook units; the lower mold is provided with a lower mold table for setting the lower panel; the movable upper mold frame forms a horizontally movable frame that moves above the lower mold table; the pressing hydraulic cylinder and the upper mold are installed on the movable upper mold frame; the pressing hydraulic cylinder is connected to and drives the upper mold to move vertically; N side hook units are evenly arranged circumferentially on the side of the upper mold; each side hook unit is provided with a hook for hooking the edge of the upper panel and a hook driving component for driving the hook to move outward; the side of the lower mold is provided with a hook part that engages with the hook.

[0006] In the above technical solution, preferably, horizontal linear guide rails are provided on both sides of the lower mold base, and the movable upper mold frame is a gantry-shaped traveling frame that is mounted on the horizontal linear guide rails and moves horizontally and linearly along the horizontal linear guide rails. The gantry-shaped traveling frame includes support side frames located on both sides and a platform located between the two support side frames, and the pressing mold hydraulic cylinder is installed on the platform.

[0007] In the above technical solution, preferably, the upper mold is installed on the movable upper mold frame through a vertical guide mechanism.

[0008] In the above technical solution, preferably, the hook driving component is a hook lock hydraulic cylinder, the cylinder body of the hook lock hydraulic cylinder is installed on the side of the upper mold through a pin, the upper mold is installed with a swing driving hydraulic cylinder that drives the hook lock hydraulic cylinder to swing around the pin, the hook is installed on the cylinder rod of the hook lock hydraulic cylinder, and the hook pulling part is a shaft provided on the side of the lower mold.

[0009] In the above technical solution, preferably, the vertical guide mechanism includes vertical racks located at the four corners of the movable upper mold frame, guide gears meshing with the vertical racks are installed at the four corners of the movable upper mold frame, all the guide gears are connected by a synchronous transmission shaft and a bevel gear, and the lower end of the vertical rack is connected to the upper mold.

[0010] The advantages and effects of the mold-closing mechanism used in the processing of this foam sandwich panel are as follows:

[0011] High-efficiency moving upper mold function: The moving upper mold assembly is formed by the combination of the moving upper mold frame, the pressing hydraulic cylinder, the upper mold, and the side hook pull unit. The resulting moving upper mold assembly can efficiently move the upper panel horizontally above the lower panel. In this mold closing structure, the upper mold, in particular, works by closing after translation, a mold closing method that is completely different from traditional presses, providing basic mold support for the manufacture of foam sandwich panels.

[0012] Multi-mold parallel operation improves production efficiency: This mold-closing mechanism combines multiple lower molds through a single traveling upper mold assembly, enabling multi-mold parallel operation. This design allows the same machine to process multiple lower panels simultaneously, greatly improving production efficiency. It is especially suitable for large-scale, high-efficiency production needs, saving on equipment investment and space occupation.

[0013] Flexible synchronous control of foaming agent generation: The moving upper mold assembly not only moves the upper panel but also serves as a mobile carrier for the foaming agent generation device. Synchronized control of foaming agent generation and upper panel movement ensures that the foaming material is applied to the lower panel at precise time and location. This synchronized operation effectively improves the efficiency of foaming agent use, avoids material waste, and the integration of foaming agent generation with the upper mold closing process ensures a tight bond between the foam layer and the inner and outer panels, enhancing the quality of the final product.

[0014] Optimized material feeding and clamping actions: After the upper panel is aligned, the traveling upper mold assembly performs precise material feeding and clamping actions. This process, through precise control of pressure and timing, ensures that the foamed material is evenly distributed and forms a firm bond with the upper and lower panels, guaranteeing the density, uniformity, and stable adhesion of the foamed layer to the vehicle body panels. This effectively avoids problems such as localized delamination and poor adhesion that occur in traditional processes.

[0015] Supports multi-functional expansion: This mold-closing mechanism can not only efficiently produce carriage panels, but also expand other functions in different production stages, such as loading the foaming agent generation assembly. The mold-closing structure serves as the platform for the foaming agent generation assembly, and plays the function of generating foaming agent during the feeding process of the upper carriage panel, providing more possibilities for the expansion and transformation of the carriage panel production line.

[0016] This mold-closing mechanism for processing foam sandwich panels improves production efficiency, operational precision, and product quality by optimizing the function of the moving upper mold assembly, while also enhancing the system's flexibility and environmental friendliness, providing a highly efficient, energy-saving, and environmentally friendly solution for the refrigerated truck manufacturing industry. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a side view of the present invention;

[0019] Figure 3 This is a schematic diagram of the side hook unit in this utility model;

[0020] Figure 4 This is a structural schematic diagram of the vertical guide mechanism in this utility model. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.

[0022] To address the problems in existing technologies regarding the bonding process in refrigerated truck body panel manufacturing, such as excessive weight of the panels, increased production costs due to the use of large amounts of chemical adhesives, low production efficiency, and unstable bonding quality, this utility model provides a mold-closing mechanism for processing foam sandwich panels. To further illustrate the structure of this utility model, a detailed description is provided below in conjunction with the accompanying drawings:

[0023] Please see Figure 1 and Figure 2A mold closing mechanism for processing foam sandwich panels includes a lower mold 2, a movable upper mold frame 3, a pressing hydraulic cylinder 4, an upper mold 5, and a side hook pulling unit 6.

[0024] The lower mold is installed on the lower mold base 1. Specifically, the lower mold base is a rectangular support base, and its specific dimensions can be designed according to the size of the vehicle body panel to be adapted, with an area larger than the vehicle body panel to be processed.

[0025] The lower mold is a rectangular platform fixed on the lower template. The lower mold has a lower mold table surface for setting the lower panel, which is the supporting plane of the lower panel. The lower mold table surface is provided with a limiting component, which includes a rectangular limiting frame, and the inner side of the rectangular limiting frame forms a pressing groove whose shape is adapted to the contour of the lower panel.

[0026] In this embodiment, specifically, fixed limiting blocks are evenly distributed around the lower mold table surface of the lower mold. The four sides of the rectangular limiting frame are set inside the limiting blocks. The ends of the four sides do not need to be joined, and corner openings are left to facilitate the adjustment of the enclosure area. In order to make the size of the rectangular limiting frame adjustable, an expansion block is pressed between the fixed limiting block and the side of the rectangular limiting frame. The expansion block includes a top plate that contacts the fixed limiting block and the side of the frame respectively, and a screw connected between the two top plates by threads. The overall width of the expansion block is adjusted by rotating the screw to adjust the length screwed into the top plate, thereby adjusting the distance between the side of the frame and the fixed limiting block.

[0027] The movable upper mold frame forms a horizontally moving frame that moves above the lower mold platform. The function of the movable upper mold frame is to move the upper panel horizontally and linearly above the lower panel, ultimately aligning it with the vertical projection of the lower panel. Another function is to allow the foaming material generation assembly mounted on it to form a foaming material layer between the lower and upper panels during its movement. In other words, it is an active driving component that simultaneously completes the feeding of the upper panel and the formation of the foaming material layer. Specifically, in this embodiment, horizontal linear guide rails are provided on both sides of the lower mold base. The movable upper mold frame is a gantry-shaped traveling frame mounted on and moving horizontally along the horizontal linear guide rails. The gantry-shaped traveling frame includes support side frames located on both sides and a platform located between the two support side frames. The pressing hydraulic cylinder is mounted on the platform. Furthermore, the gantry-shaped traveling frame is a steel frame, with traveling wheels and a traveling motor device that drives the traveling wheels to rotate installed on the lower part of the supporting side frames on both sides. The platform is a flat steel hook frame, which is used to load the hydraulic cylinder for pressing the mold, the upper mold, and the foaming material generation assembly.

[0028] In this embodiment, a foaming material generating assembly 7 is mounted on the movable upper mold frame. The foaming material generating assembly is installed on the movable upper mold frame and has a foaming material outlet installed at the forward travel end of the movable upper mold frame. The foaming material outlet laterally supplies foaming material to the lower chamber plate. Specifically, in this embodiment, the foaming material generating assembly has a discharge conduit 7-1, which is horizontally positioned and perpendicular to the horizontal movement direction of the movable upper mold frame. The discharge conduit is laterally positioned above the lower mold table, and foaming material outlets are axially spaced along the discharge conduit. A foaming agent nozzle frame is fixed to the front edge of the advancing side of the upper mold. A horizontally horizontal, cross-sectional lower mold support plane discharge conduit is installed at the lower part of the foaming agent nozzle frame. A plurality of nozzles capable of spraying foaming agent are evenly distributed axially at the lower part of the discharge conduit to ensure that foaming agent extending laterally (perpendicular to the upper chamber plate feeding direction) can be formed on the lower chamber plate. During the horizontal linear movement of the foaming material outlet, a foaming agent layer covering the upper chamber plate is ultimately formed.

[0029] The existing foam material generation assembly is primarily used to generate foam materials with excellent thermal insulation properties during the production process and precisely inject them into sandwich structures. This equipment typically consists of several core components, including a foaming agent supply system, a mixing system, an injection device, and a control system. The supply system precisely delivers raw materials to the mixing zone according to a set ratio, while the mixing system ensures the uniform blending of various foaming agent components, avoiding quality problems caused by uneven reactions. Next, the injection device precisely injects the generated foam material between the inner and outer panels of the sandwich structure, such as the body panel, forming a uniform foam layer. The control system monitors the entire process in real time, ensuring the quality of the foam material and the controllability of the reaction process through fine-tuning parameters. This existing foam material generation assembly effectively improves production efficiency, reduces raw material waste, and ensures higher product quality consistency and a longer service life through a stable production process.

[0030] The pressing hydraulic cylinder and the upper mold are mounted on a movable upper mold frame. The pressing hydraulic cylinder is connected to and drives the upper mold to move vertically. The upper mold is mounted on the movable upper mold frame via a vertical guide mechanism 8. (See also...) Figure 4In this embodiment, specifically, the vertical guiding mechanism includes vertical racks 8-1 located at the four corners of the movable upper mold frame, gear seats 8-2 installed at the four corners of the movable upper mold frame, guide gears 8-3 meshing with the vertical racks installed in the gear seats, and the vertical racks vertically passing through the gear seats to form vertical guidance for the vertical racks. All guide gears are connected through synchronous transmission shafts 8-4 and bevel gears 8-5. The lower end of the vertical rack is connected to the upper mold. The pressing hydraulic cylinders are vertically arranged; in this embodiment, there are four, facing the platform evenly distributed on the movable upper mold frame. The platform fixes the cylinder body of the pressing hydraulic cylinders, and the piston rods of the pressing hydraulic cylinders extend and retract vertically downwards, with the end of the piston rod connected to the upper mold. The vertical guiding mechanism is a structure to ensure that the upper mold moves vertically in a horizontal and stable posture. Vertical racks are distributed and connected at the four corners of the upper mold. As a component to maintain balance, the upper end of the vertical rack is connected to the gear set and the synchronous transmission shaft. The gear set includes guide gears that mesh with the vertical racks. The guide gears are mounted on the frame through axles. This axle is then connected to other guide gears through a bevel gear set and a horizontally arranged synchronous transmission shaft, thereby ensuring the synchronization of the vertical racks.

[0031] The above structural design, by evenly distributing the hydraulic cylinders of the pressing mold at the four corners of the moving upper mold frame and utilizing the vertical guiding mechanism in conjunction with the meshing of the vertical rack and guide gears, ensures that the upper mold maintains a horizontal and stable posture during vertical movement. This structure effectively avoids tilting or instability caused by gravity imbalance or excessive local stress during mold movement, ensuring the uniformity and precision of the entire pressing process. The synchronous transmission design between the vertical rack and guide gears guarantees the synchronous movement of the upper mold in the vertical direction. All guide gears are connected to bevel gears via a synchronous transmission shaft, ensuring consistent movement of each guide gear, avoiding errors between different gears, and ensuring the stability and symmetry of the upper mold. This synchronous transmission mechanism makes the vertical movement of the mold more precise, thereby improving the quality of the processed products. This design uses gear meshing transmission and is connected by gear sets, bevel gear sets, and synchronous transmission shafts, reducing friction and wear between various components. While ensuring precise transmission, it reduces wear caused by uneven force, extends the service life of the equipment, and lowers maintenance costs. The vertical and evenly distributed hydraulic cylinders of the pressing mold ensure more uniform pressure application, avoiding force concentration in one direction. The stable driving force provided by the hydraulic system allows the upper mold to maintain smooth movement even under heavy loads, thus meeting the high-intensity operational requirements of large-scale production. This design guarantees smooth vertical movement of the upper mold, greatly improving alignment accuracy during the pressing process. This precise control makes the production process smoother, reducing downtime caused by error adjustments or mold misalignment, thereby improving production efficiency and shortening the production cycle. The vertical guide mechanism ensures the stability of the upper mold during movement, avoiding the risk of mold swaying or instability. Combined with precise synchronous transmission, operators can more easily control the equipment, reducing the risk of accidents due to improper operation and improving operational safety. Because the various components in this structural design, such as guide gears and synchronous transmission shafts, are independently set and connected, equipment adjustment and maintenance become more convenient. When a fault occurs or adjustments are needed, corrections can be made by adjusting the synchronous transmission system without requiring large-scale disassembly of the entire structure, improving equipment maintainability.

[0032] N side hook pull units are evenly arranged circumferentially on the side of the upper mold. Please refer to [link / reference]. Figure 3The side hook unit is equipped with a hook 6-1 for hooking onto the edge of the upper panel and a claw drive component for driving the hook to move outward. The lower mold side is equipped with a hook pull part that engages with the hook. In this embodiment, specifically, the claw drive component is a hook lock hydraulic cylinder 6-2. The cylinder body of the hook lock hydraulic cylinder is mounted on the side of the upper mold via a pin, the hook is mounted on the cylinder rod of the hook lock hydraulic cylinder, and the hook pull part is a shaft located on the side of the lower mold. Specifically, several shaft seats are evenly distributed along the edge of the upper mold. The shaft seats are mounted on the cylinder body of the hook lock hydraulic cylinder via pins. The hook lock hydraulic cylinder uses the pin as a pivot to achieve oscillation. The pin is parallel to the side of the upper mold, and the oscillation can achieve the inward and outward swing of the hook, thereby achieving hooking onto the edge of the upper panel or hooking onto the lower mold. The output of the yaw drive force can be achieved through a yaw drive motor that drives the pin shaft to rotate. In this embodiment, the yaw drive force output is a yaw drive hydraulic cylinder 6-3. The cylinder body of the yaw drive hydraulic cylinder is fixed to the inner side of the upper mold and is hinged to the bracket fixed to the upper mold. Its piston rod is hinged to the cylinder body of the hook lock hydraulic cylinder. The extension and retraction of the piston rod of the yaw drive hydraulic cylinder drives the hook lock hydraulic cylinder to yaw. In order to achieve synchronous yaw of the hook lock hydraulic cylinders of all side hook pulling units on the same side, the cylinder bodies of the yaw drive hydraulic cylinders of the side hook pulling units on the same side are connected by the same connecting rod frame. The piston rod of the yaw drive hydraulic cylinder is hinged to the connecting rod frame to drive all side hook pulling units on the same side to work synchronously. The cylinder body hinge axis and piston rod hinge axis of the yaw drive hydraulic cylinder are parallel to the axis of the pin shaft of the hook lock hydraulic cylinder to achieve the completion of the yaw action.

[0033] After the foaming agent layer is pressed onto the upper and lower body panels, the design of distributing the locking clamping force around the perimeter of the panels significantly improves product quality. Firstly, the peripheral distribution of the locking clamping force provides uniform and stable pressure, ensuring more even diffusion and curing of the foaming agent within the interlayer. This avoids defects such as voids, collapses, or inconsistent thickness caused by uneven local pressure, thereby improving the density and thermal insulation performance of the foam layer. Secondly, this design effectively enhances the tight bond between the foam layer and the inner and outer body panels, especially at the edges, where the connection is stronger, preventing delamination or peeling due to loose edges and improving the overall structural stability and service life of the body panels. Simultaneously, the uniform pressure distribution helps maintain the flatness of the body panels, preventing deformation or warping due to uneven stress, thus ensuring consistency in appearance and function. Furthermore, this design optimizes the distribution of air bubbles within the foam layer, creating a more regular closed-cell structure, further enhancing the thermal insulation performance and compressive strength of the body panels. This peripherally distributed clamping method not only improves the production quality of the carriage panels, but also provides reliable technical support for large-scale production, helping to improve the product qualification rate and market competitiveness.

[0034] The side hook unit serves as both a hook for feeding the upper panel and a clamping mechanism for the upper and lower dies. This dual function simplifies the production process and reduces the need for additional components. Operators can perform feeding and clamping operations with a single device, avoiding frequent equipment changes and adjustments, significantly improving production efficiency and operational consistency. This dual-function design integrates these two functions into a single component, saving space and reducing the number of required parts. This not only improves the space utilization of the production line but also effectively reduces equipment procurement and maintenance costs. When clamping the upper and lower dies, the side hook unit ensures precise die alignment through precise force control. This accurate clamping force distribution prevents misalignment or uneven pressing caused by uneven clamping or loosening, thus ensuring the stability and high precision of the die during processing. By integrating two key functions into one component, system complexity and potential failure points are reduced, improving equipment reliability. With fewer operational steps, the probability of malfunctions is correspondingly reduced, enhancing equipment stability and maintainability. This design combines feeding and clamping functions into one, simplifying the operation process. Operators only need to focus on one function, reducing operational complexity and thus minimizing errors caused by improper operation, improving ease of use and safety. The side hook unit simultaneously performs two functions, contributing to better coordination between different parts of the equipment. Enhanced synchronization of feeding and clamping actions results in smoother mold pressing, reducing potential asynchrony or conflict between devices and improving the overall smoothness of the production process. The integrated design makes the system more flexible in responding to different production needs. For example, in different production batches, the force and position of feeding and clamping can be adjusted as needed. The system can better adapt to upper panels and molds of different specifications and sizes, enhancing the equipment's adaptability and versatility.

[0035] In this embodiment, the upper mold is further further equipped with a heating component uniformly configured to heat the upper panel. The heating component provides uniform heat to the upper panel, maintaining its surface temperature within a suitable range for the curing of the foamed material. Under thermal conditions, the foamed material can complete chemical reactions (such as foaming agent decomposition and cross-linking curing) more quickly, thereby accelerating the foam layer molding process and improving production efficiency. Under the action of the heating component, the surface temperature of the upper panel increases, reducing the interfacial viscosity with the foamed material and promoting intermolecular interpenetration and cross-linking. This effectively improves the adhesion between the foamed layer and the upper panel, forming a tighter interfacial bond. Uniform heating avoids differences in the curing speed of the foamed material caused by uneven local temperatures. By providing a consistent thermal environment for the foamed material, the generation, expansion, and curing of bubbles during the foaming process are more uniform, forming a dense and stable foamed layer.

[0036] The heating assembly employs a combination of embedded electric heating tubes and a high-thermal-conductivity heat-conducting plate to achieve uniform heating of the upper chamber. Specifically, resistance heating tubes are evenly arranged in a grid pattern inside the upper mold, with uniform spacing, and fixed to the back of the heat-conducting plate using high-temperature resistant insulating material. The heat-conducting plate is made of aluminum alloy or copper, with a thickness controlled at 5-10mm, possessing excellent thermal conductivity. Its surface is smoothed and coated with a high-temperature resistant, anti-oxidation coating, directly contacting the upper chamber to transfer heat. To ensure the uniformity and precision of heating, PTC thermistor temperature sensors are embedded at multiple key locations on the heat-conducting plate, combined with a PID controller for real-time temperature monitoring and adjustment. This ensures that the upper chamber remains within the suitable temperature range for the curing of the foamed material, guaranteeing both the quality and density of the foamed layer while improving processing efficiency and product performance.

[0037] The working method of this device is as follows:

[0038] S1. The upper mold is mounted on the side of the lower mold by the movable upper mold frame, and the lower box plate is placed horizontally on the lower mold table;

[0039] S2. The upper panel is hooked by the side hook unit and moves directly above the lower panel by moving the upper mold frame. The horizontal movement direction is parallel to the side of the rectangular lower panel.

[0040] S3. The foam material outlet of the foam material generation assembly supplies foam material to the upper surface of the lower compartment panel during the process from entering the area above the lower compartment panel to leaving the area above the lower compartment panel.

[0041] S4. After the upper panel moves to be directly above the lower panel and aligned, the side hook unit hooks down the upper panel, and the hydraulic cylinder drives the lower mold to descend, causing the upper panel to press onto the foam material on the upper surface of the lower panel.

[0042] S5. The side hook unit works, and the upper panel, foam material and lower panel are locked and pressed together by the side hook unit and the hook part of the lower mold.

[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0044] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A mold closing mechanism for processing foam sandwich panels, characterized in that: The device includes a lower mold, a movable upper mold frame, a pressing hydraulic cylinder, an upper mold, and side hook units. The lower mold has a lower mold platform for setting the lower panel. The movable upper mold frame forms a horizontally movable frame that moves above the lower mold platform. The pressing hydraulic cylinder and the upper mold are mounted on the movable upper mold frame. The pressing hydraulic cylinder is connected to and drives the upper mold to move vertically. N side hook units are evenly arranged circumferentially on the side of the upper mold. Each side hook unit has a hook for hooking the edge of the upper panel and a hook drive component for driving the hook to move outward. The side of the lower mold has a hook part that engages with the hook.

2. The mold closing mechanism for processing foam sandwich panels according to claim 1, characterized in that: The lower mold base is provided with horizontal linear guide rails on both sides. The movable upper mold frame is a gantry-shaped traveling frame that is mounted on the horizontal linear guide rails and moves horizontally and linearly along the horizontal linear guide rails. The gantry-shaped traveling frame includes support side frames located on both sides and a platform set between the two support side frames. The pressing mold hydraulic cylinder is installed on the platform.

3. The mold closing mechanism for processing foam sandwich panels according to claim 1, characterized in that: The upper mold is mounted on the movable upper mold frame via a vertical guide mechanism.

4. The mold closing mechanism for processing foam sandwich panels according to claim 1, characterized in that: The hook drive component is a hook lock hydraulic cylinder. The cylinder body of the hook lock hydraulic cylinder is mounted on the side of the upper mold via a pin. The upper mold is equipped with a swing drive hydraulic cylinder that drives the hook lock hydraulic cylinder to swing around the pin. The hook is mounted on the cylinder rod of the hook lock hydraulic cylinder. The hook pulling part is a shaft located on the side of the lower mold.

5. The mold closing mechanism for processing foam sandwich panels according to claim 3, characterized in that: The vertical guide mechanism includes vertical racks located at the four corners of the movable upper mold frame. Guide gears that mesh with the vertical racks are installed at the four corners of the movable upper mold frame. All the guide gears are connected by a synchronous transmission shaft and a bevel gear. The lower end of the vertical rack is connected to the upper mold.

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