Temperature equalizing plate structure for a hot press

Abstract

The utility model relates to a temperature heat equalizing plate structure for hot press belongs to hot press heat equalizing plate technical field. The temperature heat equalizing plate structure for hot press, include: upper cover and lower cover. The heat equalizing mechanism includes the upper capillary structure and lower capillary structure of setting between upper cover and lower cover, be provided with support assembly between the upper capillary structure and lower capillary structure, through setting support assembly in the inside of heat equalizing plate, when hot pressing plate drives heat equalizing plate to carry out hot pressing to board material, the support block will insert to the recess depth inside the side support block, through the deformation of side support block and the adjustment of elastic sheet, the vertical pressure of a part of support block is decomposed into the force along the surface of side support block and extends to both sides, thereby significantly enhance the rigidity of heat equalizing plate center area, effectively resist the plastic micro deformation under the long -term high -pressure work, make the lower surface and heating plate always keep close adhesion, reduced the contact thermal resistance due to the bad contact.

Description

Technical Field

[0001] This utility model relates to the field of heat spreader plate technology for hot presses, and in particular to a temperature heat spreader plate structure for hot presses. Background Technology

[0002] Hot presses apply high temperature and pressure to wood composite boards and their decorative veneers, causing the hot melt adhesive in the middle to melt, flow, and solidify, achieving permanent bonding. During this process, a heat spreader plate, as a core component, rapidly and evenly transfers heat from the heating plate to the entire pressing surface with minimal temperature difference. This ensures that the adhesive cures synchronously throughout the board, effectively preventing defects such as localized delamination, blistering, or veneer burns caused by uneven temperature. It is a key guarantee for achieving high-quality surface decoration.

[0003] Traditional heat spreaders, as metal components embedded inside hot press plates, work by relying on the high thermal conductivity of the metal material itself. They obtain heat through close contact with the external heating plate and transfer the heat laterally from the local heat source to the entire plate surface through solid heat conduction. This provides a heating plane that is as uniform as possible for the workpiece being pressed, ensuring the temperature uniformity of the pressing process and thus heating the workpiece.

[0004] However, during the hot pressing process, the central area of ​​the large-size heat spreader, as the main pressure-bearing part, may be prone to micro-deformation under high pressure due to insufficient support after long-term operation, resulting in poor contact with the heating plate and generating contact thermal resistance, which affects heat transfer. Utility Model Content

[0005] Therefore, it is necessary to provide a temperature heat spreader structure for hot presses to address the problem of insufficient support of traditional heat spreaders during the hot pressing process.

[0006] A temperature heat spreader structure for a hot press includes an upper cover plate and a lower cover plate.

[0007] The heat dissipation mechanism includes an upper capillary structure and a lower capillary structure disposed between the upper cover plate and the lower cover plate. A support assembly is provided between the upper capillary structure and the lower capillary structure, and a disassembly assembly is provided between the upper cover plate and the lower cover plate.

[0008] In one embodiment, the upper cover capillary structure is disposed on the inner wall of the upper cover plate, the lower cover capillary structure is disposed on the inner wall of the lower cover plate, and the support assembly is disposed in the cavity formed between the upper cover plate and the lower cover plate.

[0009] In one embodiment, the support assembly includes a support block fixedly connected to the upper surface of the capillary structure of the lower cover, the support block having an isosceles trapezoidal cross-section and being made of high-strength stainless steel.

[0010] In one embodiment, a side support block is fixedly connected to the lower surface of the capillary structure of the upper cover. The side support block has a "U"-shaped cross-section and a groove that fits the support block inside. The side support block is made of beryllium copper.

[0011] In one embodiment, a fixing block is provided on both sides of the side support block, the fixing block is fixedly connected to the lower surface of the capillary structure of the upper cover, and a spring piece is fixedly connected to the side surface of the fixing block near the side support block.

[0012] In one embodiment, the disassembly assembly includes insert rods disposed at the four corners of the upper cover plate and the lower cover plate, and corresponding insertion holes are provided at the four corners of the upper cover plate and the lower cover plate.

[0013] In one embodiment, a set of locking blocks are fixedly connected to the surface of the insertion rod near its bottom end, and an adapter is provided at the top end of the insertion rod.

[0014] In one embodiment, the socket is provided with a slot formed on the inner wall of the lower cover plate, the top of the slot penetrates the lower cover plate, and the inner wall of the lower cover plate is provided with a slot that cooperates with the slot, the slot being in communication with the slot.

[0015] In one embodiment, a sealing strip is fixedly connected to the upper surface of the lower cover plate, and a sealing groove that fits the sealing strip is formed on the lower surface of the upper cover plate.

[0016] Beneficial effects

[0017] 1. By setting a support component inside the heat spreader, when the heat press plate drives the heat spreader to heat press the plate, the support block will insert into the groove inside the side support block. Through the deformation of the side support block and the adjustment of the spring, part of the vertical pressure of the support block is decomposed into a force extending to both sides along the surface of the side support block. This significantly enhances the rigidity of the central area of ​​the heat spreader, effectively resists the plastic micro-deformation under long-term high pressure operation, and keeps the lower surface and the heating plate in close contact at all times. This reduces the contact thermal resistance caused by poor contact and ensures the efficient and stable introduction of heat from the heat source to the heat spreader.

[0018] 2. This solution uses a disassembly and assembly assembly consisting of a rod and a hole between the upper and lower cover plates. When it is necessary to clean or maintain the inside of the heat spreader, the staff can directly use a special tool to remove the rod and quickly separate the upper and lower cover plates. This greatly simplifies the maintenance process, significantly reduces maintenance costs and time, and effectively protects the integrity of the plate and its internal capillary structure, thus extending the product's service life. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is an exploded view of the present invention;

[0022] Figure 3 This is a schematic diagram of the overall structure of the heat dissipation mechanism of this utility model;

[0023] Figure 4 This is a schematic diagram of the overall structure of the support component of this utility model;

[0024] Figure 5 This is a schematic diagram of the overall structure of the disassembly and assembly components of this utility model.

[0025] Figure label:

[0026] 100. Upper cover plate; 200. Lower cover plate; 300. Heating mechanism; 310. Upper cover capillary structure; 320. Lower cover capillary structure; 330. Support assembly; 331. Side support block; 332. Support block; 333. Fixing block; 334. Spring; 340. Assembly / disassembly assembly; 341. Insert rod; 342. Locking block; 343. Insertion hole; 344. Slot; 345. Slot. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0028] The following is combined with Figure 1 - Figure 5 This invention describes the structure of a temperature heat spreader plate for a hot press.

[0029] In one embodiment, a temperature heat spreader structure for a hot press includes: an upper cover plate 100 and a lower cover plate 200.

[0030] The heat dissipation mechanism 300 includes an upper capillary structure 310 and a lower capillary structure 320 disposed between the upper cover plate 100 and the lower cover plate 200. A support component 330 is disposed between the upper capillary structure 310 and the lower capillary structure 320, and a disassembly component 340 is disposed between the upper cover plate 100 and the lower cover plate 200.

[0031] In this device, the heat spreader is directly installed and fixed below the hot press plate of the moving pressure head of the hot press, with its working surface facing downwards. During operation, the hydraulic system of the hot press drives the moving pressure head to move downwards, and the hot press plate then tightly presses the heat spreader onto the surface of the material to be processed. During this process, the heat generated by the heating plate inside the hot press plate is continuously transferred to the heat spreader, while the working liquid in the vacuum chamber inside the heat spreader absorbs heat and rapidly vaporizes in the evaporation section. The vapor diffuses at high speed to the entire condensation section under the action of pressure difference and releases latent heat, realizing the uniform transfer of heat energy to the material. The condensed liquid is then driven back to the evaporation section by the capillary pump force generated by the capillary structure of the inner wall, thus forming a continuous and efficient two-phase circulating heat transfer.

[0032] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the upper capillary structure 310 is disposed on the inner wall of the upper cover plate 100, the lower capillary structure 320 is disposed on the inner wall of the lower cover plate 200, and the support assembly 330 is disposed in the cavity formed between the upper cover plate 100 and the lower cover plate 200. The support assembly 330 includes a support block 332 fixedly connected to the upper surface of the lower capillary structure 320. The cross-section of the support block 332 is an isosceles trapezoid, and the support block 332 is made of high-strength stainless steel. A side support block 331 is fixedly connected to the lower surface of the upper capillary structure 310. The cross-section of the side support block 331 is U-shaped, and the interior of the side support block 331 has a groove that fits with the support block 332. The side support block 331 is made of beryllium copper. Both sides of the side support block 331 are provided with fixing blocks 333. The fixing blocks 333 are fixedly connected to the lower surface of the capillary structure 310 of the upper cover. A spring piece 334 is fixedly connected to the side surface of the fixing block 333 near the side support block 331.

[0033] In this embodiment, the capillary structure of both the upper and lower cover plates 200 is composed of a micron-sized porous copper powder layer sintered onto the inner wall of the metal. Its working principle is that when the vapor in the condensation section condenses into liquid, the porous structure generates strong capillary force, rapidly adsorbing the liquid and spreading it radially along the plane of the cover plate. Simultaneously, the capillary layer of the lower cover plate 200 pumps the converging liquid to the evaporation zone. Through the synergistic effect of the upper and lower capillary networks, a three-dimensional reflux channel is formed throughout the entire cavity, driving the working fluid to continuously complete the phase change cycle of evaporation-diffusion-condensation-reflux. The support components 330 of this device are radially distributed within the two cover plates, extending from the center of the cover plate to the four corners. Based on the mechanical characteristics that the heat spreader mainly bears the concentrated load applied by the moving pressure head in actual operation and diffuses to the surrounding areas through the hot press plate, this solution sets a denser support component 330 in the central area. This ensures sufficient chamber space to guarantee steam flow and provides optimal structural support, effectively enhancing the heat spreader's resistance to deformation and temperature uniformity under high-pressure operating conditions.

[0034] It should be noted that the radial layout of the support components 330 in this device is carefully designed. Its wedge-shaped interlocking structure and elastic elements are made of high thermal conductivity beryllium copper material, which maintains the same thermal expansion characteristics as the cover plate while achieving mechanical support. The surface of all support components 330 is completely covered with a sintered copper powder capillary layer that is continuous with the cover plate, ensuring the integrity of the liquid return channel. Its unique radial arrangement forms a high-speed flow channel that guides the steam to diffuse radially from the center to the edge. This structure enhances the resistance to deformation and does not disrupt the continuity of the capillary network. Instead, it promotes the orderly flow of steam and return liquid by optimizing the internal spatial distribution, thereby fully ensuring the efficient operation of the phase change heat transfer cycle.

[0035] like Figure 1 , Figure 2 and Figure 5 As shown, the disassembly and assembly assembly 340 includes insert rods 341 located at the four corners of the upper cover plate 100 and the lower cover plate 200. Corresponding insertion holes 343 are provided at the four corners of the upper cover plate 100 and the lower cover plate 200. A set of locking blocks 342 are fixedly connected to the surface of the insert rods 341 near their bottom ends, and an adapter is provided at the top of the insert rods 341. A slot 344 is provided inside the insertion hole 343, formed in the inner wall of the lower cover plate 200. The top of the slot 344 penetrates the lower cover plate 200, and a groove 345 is provided in the inner wall of the lower cover plate 200 to mate with the locking blocks 342, communicating with the slot 344. A sealing strip is fixedly connected to the upper surface of the lower cover plate 200, and a sealing groove is provided on the lower surface of the upper cover plate 100 to fit the sealing strip.

[0036] In this embodiment, the upper cover plate 100 and the lower cover plate 200 are detachably fixed together by a circumferential bolt assembly. A sealing groove is formed on their contact surface, and a high-temperature resistant metal sealing ring is embedded therein, thereby achieving a vacuum seal of the cavity. The lower cover plate 200 is equipped with a vacuum valve. After the two cover plates are assembled and tightened, the internal cavity is evacuated to a high vacuum state through this vacuum valve. When maintenance is required, the vacuum state must first be released, and then all the insert rods 341 are loosened and removed in sequence to separate the upper and lower cover plates 200. The insert rods 341 and the insertion holes 343 serve as auxiliary positioning mechanisms, used only after the main bolts are removed to guide the cover plates to separate smoothly in the final step; their insertion and removal do not undertake the main sealing and maintaining function.

[0037] Working Principle: After the device is installed in the hot press, the heating plate heats the heat spreader plate, while the hot press plate moves the heat spreader plate towards the board, hot pressing the decorative veneer to bond it to the wood composite board. During this process, the heat spreader plate bears pressure from the board and the hot press plate, causing the upper and lower cover plates 200 to deform invisibly. This deformation synchronously drives the support block 332 to insert into the groove of the side support block 331, decomposing the vertical pressure into a thrust along the groove and a lateral force that causes the side support block 331 to expand to both sides. By decomposing the force, the deformation of the cover plate is significantly suppressed and an effective buffer is provided. When the side support block 331 expands outward, it compresses the spring sheet 334, and the reverse force generated by the spring sheet 334 continues to act on the side of the side support block 331. When the hot pressing ends, the side support block 331 resets under the dual action of its own material elastic recovery force and the thrust of the spring sheet 334, driving the entire support structure and cover plate back to their initial state.

[0038] It should be noted that the upper cover plate 100, lower cover plate 200, upper cover capillary structure 310, lower cover capillary structure 320 and spring sheet 334 mentioned above are all devices with relatively mature existing technology. The specific models can be selected according to actual needs, and will not be elaborated here.

[0039] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A temperature heat spreader structure for a hot press, characterized in that, include: Upper cover plate (100) and lower cover plate (200); A heat equalization mechanism (300) includes an upper capillary structure (310) and a lower capillary structure (320) disposed between an upper cover plate (100) and a lower cover plate (200). A support assembly (330) is disposed between the upper capillary structure (310) and the lower capillary structure (320), and a disassembly assembly (340) is disposed between the upper cover plate (100) and the lower cover plate (200).

2. The temperature heat spreader structure for a hot press according to claim 1, characterized in that, The upper capillary structure (310) is disposed on the inner wall of the upper cover plate (100), the lower capillary structure (320) is disposed on the inner wall of the lower cover plate (200), and the support assembly (330) is disposed in the cavity formed between the upper cover plate (100) and the lower cover plate (200).

3. The temperature heat spreader structure for a hot press according to claim 1, characterized in that, The support assembly (330) includes a support block (332) fixedly connected to the upper surface of the capillary structure (320) of the lower cover. The cross-section of the support block (332) is an isosceles trapezoid and the support block (332) is made of high-strength stainless steel.

4. The temperature heat spreader structure for a hot press according to claim 3, characterized in that, The lower surface of the capillary structure (310) of the upper cover is fixedly connected to a side support block (331). The cross-section of the side support block (331) is U-shaped. The inside of the side support block (331) is provided with a groove that fits with the support block (332). The side support block (331) is made of beryllium copper.

5. The temperature heat spreader structure for a hot press according to claim 4, characterized in that, Both sides of the side support block (331) are provided with fixing blocks (333), the fixing blocks (333) are fixedly connected to the lower surface of the capillary structure (310) of the upper cover, and the fixing blocks (333) are fixedly connected with spring pieces (334) on the side surface of the fixing blocks (333) near the side support block (331).

6. The temperature heat spreader structure for a hot press according to claim 1, characterized in that, The disassembly and assembly assembly (340) includes insert rods (341) located at the four corners of the upper cover plate (100) and the lower cover plate (200), and corresponding insertion holes (343) are provided at the four corners of the upper cover plate (100) and the lower cover plate (200).

7. The temperature heat spreader structure for a hot press according to claim 6, characterized in that, A set of locking blocks (342) are fixedly connected to the surface of the insertion rod (341) near the bottom end, and an adapter is provided at the top end of the insertion rod (341).

8. The temperature heat spreader structure for a hot press according to claim 7, characterized in that, The socket (343) is provided with a slot (344) on the inner wall of the lower cover plate (200). The top of the slot (344) penetrates the lower cover plate (200). The inner wall of the lower cover plate (200) is provided with a slot (345) that cooperates with the card block (342). The slot (345) communicates with the slot (344).

9. The temperature heat spreader structure for a hot press according to claim 1, characterized in that, A sealing strip is fixedly connected to the upper surface of the lower cover plate (200), and a sealing groove that fits the sealing strip is opened on the lower surface of the upper cover plate (100).

Images