A phenolic resin laminated board vacuum hot-press forming device and process

Abstract

The application relates to the technical field of hot-press forming of plates, in particular to a phenolic resin laminated board vacuum hot-press forming device and process, which comprises a hot-press mold, the bottom of the hot-press mold is provided with a demolding mechanism for cooling the plate, and the top of the hot-press mold is further provided with a vacuum cover for isolating ambient air; in the demolding mechanism, the condensing plate can cool the hot-press mold, the principle of thermal expansion and cold contraction is utilized to make the plate separate from the inside of the hot-press mold, meanwhile, the knocking assembly makes the hot-press mold receive instantaneous knocking force, the hot-press mold generates a slight displacement, and then the plate has inertia and has a tendency to leave the hot-press mold, so that the effect of the plate falling off from the hot-press mold is further improved.

Description

Technical Field

[0001] This application relates to the technical field of hot pressing of sheet metal, and in particular to a vacuum hot pressing apparatus and process for phenolic resin laminate. Background Technology

[0002] Phenolic resin laminates are widely used in aerospace vehicle structures and engine thermal insulation components due to their excellent ablation resistance, thermal insulation, and high specific strength. In the electronics and electrical fields, their outstanding insulation, mechanical strength, and dimensional stability make them ideal materials for printed circuit boards and insulating gaskets. Furthermore, thanks to their flame retardancy and abrasion resistance, this material is also widely used in the manufacture of automotive interior parts and brake pads. Traditional phenolic resin laminate molding processes include material preparation, material layup, vacuum sealing of molds, hot pressing and curing, and demolding inspection. During demolding, to accelerate the removal of the laminate from the mold, cooling treatment is often performed. For example, patent application CN119261043A discloses a hot pressing molding device for acrylic sheets, including a base, a top plate, and a lower mold moving mechanism. This mechanism drives the moving seat via a bidirectional screw, causing two sets of lower molding molds to move alternately: while one set of molds is forming at the hot pressing station, the other set can be cooled and removed, enabling continuous production and significantly improving efficiency.

[0003] Current technical solutions have significant drawbacks in the cooling process of sheet molding: existing patent applications mainly rely on the single method of removing air from inside the mold to promote cooling. The principle is to reduce the heat transfer medium by decreasing the air content, thereby accelerating heat dissipation. However, this method only utilizes the natural heat dissipation mechanism after air removal, lacking active and efficient cooling measures. On the one hand, after air removal, the mold and the sheet itself have a large heat capacity, making it difficult to quickly reduce the temperature through natural heat dissipation alone, resulting in low cooling efficiency. On the other hand, this single cooling method cannot precisely control the cooling rate and temperature gradient, easily causing uneven cooling in different parts of the sheet. When the cooling rate is too slow, the molecular chain rearrangement time of the phenolic resin is prolonged during the slow cooling process, easily leading to problems such as inconsistent crystallinity and uneven internal stress distribution. This, in turn, causes defects such as warping and deformation of the sheet, and decreased interlayer bonding, seriously affecting the dimensional accuracy and overall performance of the sheet. Summary of the Invention

[0004] To solve the above-mentioned technical problems, this application provides a vacuum hot pressing molding apparatus and process for phenolic resin laminates, adopting the following technical solution: In a first aspect, a vacuum hot pressing molding apparatus for phenolic resin laminates includes a hot pressing mold, a demolding mechanism for cooling the laminate is provided at the bottom of the hot pressing mold, and a vacuum shroud for isolating the surrounding air is provided at the top of the hot pressing mold, wherein the demolding mechanism includes: A condenser plate is set at the bottom of the hot press mold. On the side of the condenser plate closest to the hot press mold, multiple water channels connected end to end are evenly arranged along its width. A rectangular groove corresponding to the water channels is opened on the side of the condenser plate closest to the hot press mold.

[0005] The striking component, located inside the rectangular groove, is used to strike the hot press mold and cause the hot press mold to separate from the sheet metal.

[0006] Preferably, a movable frame is symmetrically arranged on the condensing plate along its width direction, and the movable frame is installed on the corresponding side of the condensing plate. Both movable frames are provided with a U-shaped movable frame with the opening facing downward. The vertical section of the movable frame is slidably arranged on the movable frame on the corresponding side. A lifting cylinder is installed at the bottom of the horizontal section of the movable frame. A pressing roller for hot pressing the plate is installed at the telescopic end of the lifting cylinder.

[0007] Preferably, a U-shaped plate is provided on both the condenser plate and the movable frame, and a vacuum hood is provided on the U-shaped plate, with vent holes provided on the vacuum hood.

[0008] Preferably, the striking component includes multiple rotating shafts evenly distributed along the length of the rectangular groove and rotatably mounted on the inner wall of the rectangular groove via bearings. Each rotating shaft is equipped with a sprocket, and multiple elastic telescopic rods are evenly arranged along the circumference of the rotating shaft. A striking ball is installed at the telescopic end of each elastic telescopic rod.

[0009] Preferably, a drive shaft corresponding to any rotating shaft inside the corresponding rectangular groove is rotatably installed inside the water channel through a bearing. The drive shaft is connected to the corresponding rotating shaft, and adjacent drive shafts rotate in opposite directions. Multiple automatically resetting telescopic plates are evenly arranged circumferentially on the circumferential surface of the drive shaft near the corresponding water channel.

[0010] Preferably, the bottom of the hot press mold has an arc-shaped groove for accommodating the elastic telescopic rod and the telescopic plate.

[0011] Preferably, multiple heat-conducting plates are evenly arranged inside the water channel, and the heat-conducting plates are installed at the bottom of the hot press mold. The heat-conducting plates are provided with relief grooves that cooperate with the telescopic plate, and the arc-shaped groove 11 corresponding to the telescopic plate 226 and the side close to the water flow direction are provided with a baffle plate 111 to obstruct the water flow.

[0012] Preferably, the heat-conducting sheet has multiple through grooves evenly distributed along its height direction inside.

[0013] Preferably, a first rotating shaft and a second rotating shaft are evenly arranged at the bottom of the condenser plate along its height direction, and the rotating shafts corresponding to the same-direction drive shafts are respectively connected to the first rotating shaft and the second rotating shaft via belt drive.

[0014] Secondly, a vacuum hot pressing process for phenolic resin laminates includes the following steps: S1: Material unloading process. Remove the vacuum cover, place the raw material in the hot press mold, and then reset the vacuum cover to make the inside of the vacuum cover a negative pressure state.

[0015] S2: Hot pressing treatment, in which the raw material is pressed by a pressing roller to obtain a board.

[0016] S3: Condensation treatment, after the sheet is formed, the sheet is separated from the hot press mold by a condensation plate.

[0017] S4: Collection and processing, which involves collecting and processing the cooled and formed sheets in a unified manner.

[0018] In summary, this application includes at least one of the following beneficial technical effects: 1. In the demolding mechanism designed in this invention, the condensing plate can cool the hot press mold and use the principle of thermal expansion and contraction to make the sheet material separate from the inside of the hot press mold. At the same time, the striking component makes the hot press mold subject to instantaneous striking force, causing the hot press mold to produce a slight displacement. As a result, the sheet material has inertia and tends to leave the hot press mold, thereby further improving the effect of the sheet material being removed from the hot press mold.

[0019] 2. In this invention, adjacent drive shafts rotate in opposite directions, causing the connecting rotating shaft to rotate in the opposite direction. The rotating shaft drives the striking ball through an elastic telescopic rod, applying irregular striking force to the hot press mold, thereby more effectively causing the sheet metal to detach from the hot press mold.

[0020] 3. The water channels connected end to end in this invention can increase the contact between the water flow and the hot press mold, making the condensation effect of the water flow on the hot press mold better. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural schematic diagram of the present invention.

[0022] Figure 2 This is a schematic diagram of the internal three-dimensional structure of the present invention.

[0023] Figure 3 This is a schematic diagram of the three-dimensional installation structure between the condenser plate, the striking component, and the movable frame of the present invention.

[0024] Figure 4 This is the present invention. Figure 3 A magnified view of a portion of point D.

[0025] Figure 5 This is a schematic diagram of the three-dimensional installation structure between the condenser plate, the movable frame, and the movable bracket of the present invention.

[0026] Figure 6 This is a schematic diagram of the three-dimensional installation structure between the condenser plate, the striking component, and the movable frame of the present invention.

[0027] Figure 7 This is the present invention. Figure 6 A magnified view of part A.

[0028] Figure 8 This is a cross-sectional view (viewed along the width direction of the condenser plate) of the present invention, showing the installation structure between the telescopic plate, the arc groove, and the hot pressing mold.

[0029] Figure 9 This is a cross-sectional view of the condenser plate of the present invention (viewed along the length of the condenser plate).

[0030] Figure 10 This is the present invention. Figure 9 A magnified view of section B.

[0031] Figure 11 This is the present invention. Figure 9 A magnified view of a portion of point C.

[0032] Figure 12 This is a flow chart of the vacuum hot pressing process for the phenolic resin laminate of the present invention.

[0033] Explanation of reference numerals in the attached drawings: 1. Hot press mold; 11. Arc groove; 111. Stop plate; 12. Rotating shaft one; 13. Rotating shaft two; 2. Demolding mechanism; 21. Condensation plate; 211. Water channel; 212. Rectangular groove; 213. Heat-conducting plate; 214. Through groove; 22. Striking assembly; 221. Rotating shaft; 222. Sprocket; 223. Elastic telescopic rod; 224. Striking ball; 225. Drive shaft; 226. Telescopic plate; 23. Moving frame; 24. Moving frame; 25. Lifting cylinder; 26. Pressing roller; 27. Reverse plate; 28. Vent hole; 3. Vacuum hood. Detailed Implementation

[0034] The following is in conjunction with the appendix Figures 1 to 12 This application will be described in further detail.

[0035] This application discloses a vacuum hot pressing molding apparatus and process for phenolic resin laminates. The apparatus accelerates the efficiency of the laminate detaching from the apparatus by means of condensation and tapping, thus avoiding the possibility of the laminate sticking to the apparatus.

[0036] Example 1: Reference Figures 1 to 3 A vacuum hot pressing molding apparatus for phenolic resin laminates includes a hot pressing mold 1, a demolding mechanism 2 for cooling the laminate at the bottom of the hot pressing mold 1, and a vacuum shroud 3 for isolating the surrounding air at the top of the hot pressing mold 1. The demolding mechanism 2 includes: Reference Figure 3 as well as Figure 4A condenser plate 21 is set at the bottom of the hot press mold 1. On the side of the condenser plate 21 near the hot press mold 1, a plurality of water channels 211 connected end to end are evenly arranged along its width direction. On the side of the condenser plate 21 near the hot press mold 1, a rectangular groove 212 corresponding to the water channel 211 is opened.

[0037] The striking component 22 is disposed inside the rectangular groove 212 and is used to strike the hot press mold 1 and cause the hot press mold 1 to separate from the plate.

[0038] The condensing plate 21 can cool down the hot press mold 1. By utilizing the principle of thermal expansion and contraction, the plate can be separated from the inside of the hot press mold 1. At the same time, the striking component 22 causes the hot press mold 1 to be subjected to instantaneous striking force, which causes the hot press mold 1 to produce a slight displacement. As a result, the plate has inertia and tends to leave the hot press mold 1, thereby further improving the effect of the plate being removed from the hot press mold 1.

[0039] Reference Figure 5 as well as Figure 6 A movable frame 23 is symmetrically arranged on the condensing plate 21 along its width direction, and the movable frame 23 is installed on the corresponding side of the condensing plate 21. The two movable frames 23 are jointly provided with a U-shaped movable frame 24 with the opening facing downward. The vertical section of the movable frame 24 is slidably arranged on the movable frame 23 on the corresponding side. The movable frame 23 is a rectangular strip structure. The movable frame 23 has a guide groove along its length direction. The vertical section of the movable frame 24 slides in the guide groove. A lifting cylinder 25 is installed at the bottom of the horizontal section of the movable frame 24. A pressing roller 26 for hot pressing the plate is installed at the telescopic end of the lifting cylinder 25. Specifically, a forming bracket is installed at the telescopic end of the lifting cylinder 25. The forming bracket is slidably arranged on the two vertical sections of the movable frame 24 along the longitudinal direction. The pressing roller 26 is horizontally rotated and installed on the forming bracket.

[0040] A U-shaped plate 27 is provided on both the condenser plate 21 and the movable frame 23. The U-shaped plate 27 is fitted onto the bottom outer wall of the condenser plate 21 and the movable frame 23. A vacuum cover 3 is provided on the U-shaped plate 27, and a vent hole 28 is provided on the vacuum cover 3.

[0041] Connect the vent 28 to the existing air pump (not shown in the figure). In specific operation, remove the vacuum hood 3 from the shaped plate 27. At this time, spread the raw material to be processed flat inside the hot press mold 1. Then start the lifting cylinder 25. The extension end of the lifting cylinder 25 drives the pressing roller 26 to stick tightly to the surface of the raw material. The existing drive (electric slider, etc., not shown in the figure) drives the moving frame 24 to move on the moving frame 23. During the movement of the moving frame 24, the lifting cylinder 25 drives the pressing roller 26 to press the raw material.

[0042] During the pressing process, the air inside the vacuum chamber 3 is expended using an existing air pump, creating a negative pressure state inside the vacuum chamber 3 (i.e., the internal air pressure is slightly lower than the external air pressure). This design can maintain a near-vacuum state inside the vacuum chamber 3 while preventing damage to the vacuum chamber 3. Pressing under this negative pressure environment can effectively reduce the bubble content inside the raw material board, thereby improving the intrinsic quality of the board.

[0043] The water channel 211 is installed inside the condenser plate 21. During operation, after the raw material is pressed and cooled to form a plate, the vacuum hood 3 is opened, and water is pumped into the water channel 211 through one end using an existing water pump (not shown in the figure). (The water flow direction is as follows...) Figure 3 As indicated by the arrow, the water flows through the inside of the water channel 211 and then flows out from the other end of the water channel 211. The water flowing inside the water channel 211 comes into contact with the bottom of the hot press mold 1, which can drive the heat inside the hot press mold 1. The water flow can cool down the hot press mold 1. By using the principle of thermal expansion and contraction, the plate can be separated from the inside of the hot press mold 1.

[0044] Reference Figure 7 as well as Figure 8 In order to further ensure the cooling effect of water flow on the plate, the heat-conducting plate 213 provided by the present invention can further accelerate the cooling effect of hot pressing mold 1. Specifically, multiple heat-conducting plates 213 are evenly arranged inside the water channel 211, and the heat-conducting plates 213 are installed at the bottom of the hot pressing mold 1. The heat-conducting plates 213 are provided with clearance grooves that cooperate with the telescopic plate 226.

[0045] Multiple through grooves 214 are evenly distributed inside the heat-conducting plate 213 along its height direction.

[0046] During operation, as the water circulates within the water tank 211, the heat-conducting plate 213 transfers heat from inside the hot-pressing mold 1 to the water flow, thereby accelerating heat dissipation from the mold. The through-groove 214 on the heat-conducting plate 213 increases its contact area with the water, allowing heat to be released more quickly from within the plate. Simultaneously, this design ensures uniform heat dissipation from the hot-pressing mold 1, avoiding the risk of bending of the contact surface of the sheet metal due to uneven heat dissipation between the mold and the sheet metal.

[0047] Continue to refer to Figure 7 During the water cooling process, the plate can be separated from the hot press mold 1 by striking. Specifically, the striking component 22 includes multiple rotating shafts 221 that are evenly distributed along the length of the rectangular groove 212 and rotatably mounted on the inner wall of the rectangular groove 212 by bearings. Each rotating shaft 221 is equipped with a sprocket 222. Multiple elastic telescopic rods 223 are evenly arranged along the circumference of the rotating shaft 221. A striking ball 224 is installed at the telescopic end of the elastic telescopic rod 223.

[0048] Before the work begins, the sprockets 222 inside the same rectangular groove 212 are connected by chain drive. During the work, any rotating shaft 221 is driven to rotate by the existing drive (not shown in the figure). During the rotation of this rotating shaft 221, the remaining rotating shafts 221 are driven to rotate by the sprockets 222 and chain drive. During the rotation of all the rotating shafts 221, the elastic telescopic rod 223 can be driven to rotate circumferentially. During the circumferential rotation of the elastic telescopic rod 223, the striking ball 224 is driven to strike the bottom of the hot press mold 1, and the striking force is applied to the hot press mold 1. In turn, the hot press mold 1 gives the plate inertial force, so that the plate tends to fall off the hot press mold 1, thereby more effectively causing the plate to fall off the hot press mold 1.

[0049] The elastic telescopic rod 223 can ensure that the striking ball 224 can make way for the striking ball 224 while striking the hot press mold 1, so that the striking ball 224 can pass smoothly through the closest point between itself and the hot press mold 1.

[0050] That is, when the striking ball 224 approaches the bottom of the hot press mold 1 during its circular motion, it will impact the hot press mold 1. At this time, the elastic telescopic rod 223 will compress under the impact force, absorbing part of the impact energy and allowing the striking ball 224 to apply an effective striking force to the hot press mold 1.

[0051] After the impact, the striking ball 224 needs to continue its circular trajectory, bypassing the bottom of the hot press mold 1. Due to the presence of the hot press mold 1, the movement trajectory of the striking ball 224 is restricted. At this point, the elasticity of the elastic telescopic rod 223 allows it to be further compressed, providing the necessary space for the striking ball 224 to smoothly pass through the closest point (i.e., the geometric interference point) between the impact point and the hot press mold 1 without rigid collision or jamming. After passing this closest point, the elastic telescopic rod 223 returns to its original shape or nearly to its original shape under its own elastic force.

[0052] Continue to refer to Figure 7 During the water flow process, the force generated by the water flow can drive the rotating shaft 221 to rotate. Specifically, a drive shaft 225 corresponding to any rotating shaft 221 inside the corresponding rectangular groove 212 is rotatably installed through a bearing inside the water channel 211. The drive shaft 225 is connected to the corresponding rotating shaft 221. In this application, the drive shaft 225 in the middle of the rectangular groove 212 is preferred, and adjacent drive shafts 225 rotate in opposite directions. Multiple automatically resetting telescopic plates 226 are evenly arranged circumferentially on the circumferential surface of the drive shaft 225 near the side of the corresponding water channel 211.

[0053] The water channels 211 distributed inside the condenser plate 21 have different orientations, so the water flow directions inside adjacent water channels 211 are exactly opposite. The telescopic plate 226 is an elastic telescopic structure that can automatically reset. In actual operation, the water flows inside the water channel 211 and comes into contact with the telescopic plate 226. The telescopic plate 226 drives the drive shaft 225 to rotate. During the rotation of the drive shaft 225, the corresponding rotating shaft 221 is driven to rotate. During the rotation of the rotating shaft 221, the remaining rotating shafts 221 are driven to rotate through the sprocket 222 and chain drive. During the rotation of all the rotating shafts 221, the elastic telescopic rod 223 can be driven to rotate circumferentially. During the circumferential rotation of the elastic telescopic rod 223, the striking ball 224 is driven to strike the bottom of the hot press mold 1.

[0054] Since the rotation shafts 221 inside the adjacent rectangular grooves 212 rotate in opposite directions, the striking ball 224 can apply irregular striking force to the hot press mold 1. Compared with the relatively simple vibration mode produced by regular striking force, irregular striking force can provide multi-directional and random vibration, so that the striking force can impact the contact surface between the hot press mold 1 and the plate in a changing manner from multiple angles, thereby more effectively causing the plate to fall off the hot press mold 1.

[0055] Reference Figures 8 to 11 The bottom of the hot press mold 1 is provided with an arc-shaped groove 11 for making way for the elastic telescopic rod 223 and the telescopic plate 226.

[0056] The arc-shaped groove 11 serves to make way for the fixed section of the elastic telescopic rod 233, so that after the telescopic end of the elastic telescopic rod 233 drives the striking ball 224 to fully enter the arc-shaped groove 11, a part of the fixed section of the elastic telescopic rod 233 can remain inside the arc-shaped groove 11. This ensures that the rotating shaft 221 is close to the bottom of the hot press mold 1, thereby ensuring that the telescopic plate 226 is not completely located inside the water channel 211 at the same time, avoiding the hydraulic torque of the telescopic plate 226 being zero, and ensuring that the circumferentially evenly distributed telescopic plate 226 always drives the drive shaft 225 to rotate under the action of the water flow.

[0057] It should be noted that before the striking ball 224 fully enters the arc groove 11, the elastic telescopic rod 233 has already completed striking the hot pressing mold 1. That is, the opening of the arc groove 11 will not affect the striking ball 224 striking the hot pressing mold 1, but only makes way for the elastic telescopic rod 233.

[0058] The arc-shaped groove 11 provides clearance for the telescopic plate 226 to move, allowing it to enter the hot press mold 1 during circumferential rotation. This design prevents the telescopic plate 226 from remaining in the water channel 211, which would result in zero hydraulic torque on the telescopic plate 226. It also prevents the circumferentially evenly distributed telescopic plate 226 from being relatively stationary with the water flow, thereby ensuring that the water flow can effectively drive the telescopic plate 226 to rotate circumferentially around the drive shaft 225.

[0059] The arc-shaped groove 11 corresponding to the telescopic plate 226 and the side close to the water flow direction is provided with a baffle plate 111 to obstruct the water flow. The baffle plate 111 can block the water flow above the water channel 211, so as to prevent the telescopic plate 226 located above the drive shaft 225 from being impacted by the water flow and remaining relatively stationary with the water flow. This ensures that the water flow inside the water channel 211 only contacts the telescopic plate 226 below the drive shaft 225, thereby ensuring the driving effect of the drive shaft 225.

[0060] Meanwhile, the synergistic effect of the elastic telescopic rod 223, the telescopic plate 226, and the arc-shaped groove 11 allows the elastic telescopic rod 223 and the telescopic plate 226 to retract a certain length when moving towards the center of the hot press mold 1. If the elastic telescopic rod 223 and the telescopic plate 226 were rigid structures, the required depth of the arc-shaped groove 11 would have to be greater than its total length. This would lead to a significant increase in the local thickness of the hot press mold 1, affecting its overall heat dissipation performance. Specifically, this manifests as increased uneven heat dissipation at the contact surface between the mold and the sheet metal, ultimately affecting the cooling effect of the sheet metal.

[0061] The clearance groove is also equipped with an inclined plate that cooperates with the telescopic plate 226. The inclined surface of the inclined plate reduces the cross-sectional area of ​​the telescopic plate. The inclined surface of the inclined plate always faces the direction of water flow, which reduces the cross-sectional area of ​​the water flow when the water flows into the water channel 211 to the inclined plate. This increases the impact force of the water flow at the inclined plate, making it easier for the water flow to drive the telescopic plate 226 to rotate circumferentially. The telescopic plate 226 will not collide with the inclined plate during axial rotation.

[0062] After the sheet material cools and solidifies, it is removed from the hot press mold 1.

[0063] Example 2: Refer to Figures 10 to 11 Based on Embodiment 1, rotating connecting shaft 12 and rotating connecting shaft 23 are evenly arranged at the bottom of the condenser plate 21 along its height direction. The rotating shaft 221 corresponding to the co-directional drive shaft 225 is connected to rotating connecting shaft 12 and rotating connecting shaft 23 respectively by belt drive.

[0064] In actual operation: the rotating shaft 221 corresponding to one set of co-directional drive shafts 225 is connected to the first rotating coupling shaft 12 via belt drive, and the rotating shaft 221 corresponding to the other set of co-directional drive shafts 225 is connected to the second rotating coupling shaft 13.

[0065] Start-up phase: Before the striking operation begins, an external power source (such as a motor, not shown in the figure) is required to drive the rotating shaft 12 and rotating shaft 23 to rotate. This operation is intended to provide initial driving force for the rotating shaft 221 and overcome the starting difficulties caused by insufficient water flow impact force.

[0066] Stable operation phase: Once the rotating shaft 221 enters a stable rotation state, the external force can be removed. At this time, the water flow can continuously drive the drive shaft 225 to rotate through the telescopic plate 226. If the water flow rate is insufficient to drive the drive shaft 225, the corresponding drive shaft 225 needs to be rotated by driving the first rotating coupling 12 and the second rotating coupling 13.

[0067] Finally, refer to Figure 12 The present invention also provides a vacuum hot pressing process for phenolic resin laminates, the molding process comprising the following steps: S1: Material unloading process: Remove vacuum cover 3, place the raw material in hot press mold 1, and then reset vacuum cover 3 so that the inside of vacuum cover 3 is in a negative pressure state.

[0068] S2: Hot pressing treatment, the raw material is pressed by the pressing roller 26 to obtain the board.

[0069] S3: Condensation treatment. After the raw material is pressed and cooled to form a plate, the vacuum hood 3 is opened, and water is pumped into the water channel 211 through one end of the existing water pump (not shown in the figure). The water flows out from the other end of the water channel 211 after passing through the inside of the water channel 211. The water flowing inside the water channel 211 comes into contact with the bottom of the hot press mold 1, which can drive the heat inside the hot press mold 1. The water flow can cool the hot press mold 1. During the rotation of the rotating shaft 221, it can drive the elastic telescopic rod 223 to rotate circumferentially. During the circumferential rotation of the elastic telescopic rod 223, it drives the striking ball 224 to strike the bottom of the hot press mold 1, applying a striking force to the hot press mold 1. Then, through the hot press mold 1, the plate has an inertial force, which makes the plate tend to fall off the hot press mold 1, thus more effectively promoting the plate to fall off the hot press mold 1.

[0070] S4: Collection and processing, which involves collecting and processing the cooled and formed sheets in a unified manner.

[0071] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0072] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A vacuum hot pressing molding apparatus for phenolic resin laminates, comprising a hot pressing mold (1), characterized in that: The hot press mold (1) is provided with a demolding mechanism (2) for cooling the sheet metal at the bottom, and a vacuum hood (3) for isolating the surrounding air at the top of the hot press mold (1). The demolding mechanism (2) includes: A condenser plate (21) is set at the bottom of the hot press mold (1). A number of water channels (211) connected end to end are evenly arranged on the side of the condenser plate (21) near the hot press mold (1) along its width direction. A rectangular groove (212) corresponding to the water channel (211) is opened on the side of the condenser plate (21) near the hot press mold (1). A striking component (22) is disposed inside a rectangular groove (212) for striking the hot press mold (1) and causing the hot press mold (1) to detach from the sheet metal; The striking assembly (22) includes multiple rotating shafts (221) evenly distributed along the length of the rectangular groove (212) and rotatably mounted on the inner wall of the rectangular groove (212) via bearings. Each rotating shaft (221) is equipped with a sprocket (222). Multiple elastic telescopic rods (223) are evenly arranged along the circumference of the rotating shaft (221). A striking ball (224) is installed at the telescopic end of the elastic telescopic rod (223). Inside the water channel (211), a drive shaft (225) corresponding to any rotating shaft (221) inside the corresponding rectangular channel (212) is rotatably mounted through a bearing. The drive shaft (225) is connected to the corresponding rotating shaft (221), and adjacent drive shafts (225) rotate in opposite directions. On the circumferential surface of the drive shaft (225) near the corresponding water channel (211), multiple automatically resetting telescopic plates (226) are evenly arranged in the circumferential direction. The bottom of the hot press mold (1) is provided with an arc groove (11) for making way for the elastic telescopic rod (223) and the telescopic plate (226), and a baffle plate (111) that obstructs the flow of water is provided on the side of the arc groove (11) corresponding to the telescopic plate (226) and close to the direction of water flow. Multiple heat-conducting plates (213) are evenly arranged inside the water channel (211), and the heat-conducting plates (213) are installed at the bottom of the hot press mold (1). The heat-conducting plates (213) have clearance grooves that cooperate with the telescopic plate (226). Multiple through slots (214) are evenly provided inside the heat-conducting plate (213) along its height direction.

2. The vacuum hot pressing molding apparatus for phenolic resin laminates according to claim 1, characterized in that: A movable frame (23) is symmetrically arranged on the condensing plate (21) along its width direction, and the movable frame (23) is installed on the corresponding side of the condensing plate (21). A movable frame (24) with a U-shaped structure and downward opening is provided on both movable frames (23). The vertical section of the movable frame (24) is slidably arranged on the movable frame (23) on the corresponding side. A lifting cylinder (25) is installed at the bottom of the horizontal section of the movable frame (24). A pressing roller (26) for hot pressing the plate is installed at the telescopic end of the lifting cylinder (25).

3. The vacuum hot pressing molding apparatus for phenolic resin laminates according to claim 2, characterized in that: A spiral plate (27) is provided on both the condenser plate (21) and the movable frame (23). A vacuum hood (3) is provided on the spiral plate (27), and a vent hole (28) is provided on the vacuum hood (3).

4. The vacuum hot pressing molding apparatus for phenolic resin laminates according to claim 1, characterized in that: The bottom of the condenser plate (21) is uniformly provided with a rotating coupling first (12) and a rotating coupling second (13) along its height direction. The rotating shaft (221) corresponding to the same direction drive shaft (225) is connected to the rotating coupling first (12) and the rotating coupling second (13) respectively by belt drive.

5. A vacuum hot pressing process for phenolic resin laminates, employing the vacuum hot pressing apparatus for phenolic resin laminates as described in claim 3, characterized in that... Its molding process includes the following steps: S1: Discharge process, remove the vacuum cover (3), place the raw material in the hot press mold (1), and then reset the vacuum cover (3) so that the inside of the vacuum cover (3) is in a negative pressure state; S2: Hot pressing treatment, the raw material is pressed by pressing roller (26) to obtain the board; S3: Condensation treatment, after the sheet is formed, the sheet is separated from the hot press mold (1) by the condensation plate (21); S4: Collection and processing, which involves collecting and processing the cooled and formed sheets in a unified manner.

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