Activity platform and laminator

Abstract

This utility model belongs to the field of laminating machine technology, and specifically relates to a movable platform and a laminating machine. A movable platform includes at least one sub-platform. Each sub-platform includes a main body and a reinforcing structure. The main body has a receiving cavity, and the reinforcing structure is disposed within the receiving cavity. The reinforcing structure causes the stiffness of the sub-platform to increase sequentially from the center outwards. The sub-platform adopts a stiffness gradient distribution design, with moderate elastic deformation occurring in the high-stress central region, while sufficient stiffness is maintained around the perimeter. By matching the stiffness distribution with the stress characteristics of the movable platform, a layout of strong perimeter and weak center is formed. This actively guides and disperses the huge concentrated thrust borne by the movable platform, effectively offsetting deformation differences in different regions, significantly improving the flatness and parallelism of the movable platform, and ensuring a tight fit between the workpiece and the pressure plate assembly.

Description

Technical Field

[0001] This utility model belongs to the field of circuit board manufacturing technology, and in particular relates to a movable platform and a laminator. Background Technology

[0002] Laminators are core equipment in printed circuit board (PCB) manufacturing, especially crucial in the lamination process of multilayer boards. The precision of the laminator has a significant impact on the flatness and parallelism of PCB multilayer boards. When the flatness of the multilayer board does not meet the standards, it will have adverse effects such as a high scrap rate on subsequent processes such as drilling and hole metallization.

[0003] Currently, almost all activity platforms in the industry are made from a single thick steel plate. When this structure is subjected to huge pressure, stress concentration will occur in the middle area, which is very easy to cause the phenomenon of "protruding in the middle and warping at both ends". This deformation will be transmitted to the hot press plate assembly during hot pressing, ultimately affecting the flatness of the multi-layer board. Utility Model Content

[0004] The technical problem to be solved by this utility model is: to address the problem that stress concentration occurs in the middle area of ​​the existing movable platform, which easily leads to the phenomenon of "protrusion in the middle and warping at both ends" and thus affects the flatness of the lamination of multilayer boards, and to provide a movable platform and laminator.

[0005] To solve the above-mentioned technical problems, on the one hand, this utility model provides a movable platform for cooperating with a pressure plate assembly to compress a workpiece. The movable platform includes at least one sub-platform, and the sub-platform includes a main body and a reinforcing structure. The main body is provided with a receiving cavity, and the reinforcing structure is disposed in the receiving cavity. The reinforcing structure makes the rigidity of the sub-platform increase from the center to the periphery.

[0006] Optionally, the stiffness of the reinforcing structure gradually increases from the center of the sub-platform outwards.

[0007] Optionally, multiple sub-platforms are provided, and the multiple sub-platforms are stacked in a vertical direction. The uppermost sub-platform can abut against the pressure plate assembly, and the rigidity of the multiple sub-platforms increases sequentially from top to bottom.

[0008] Optionally, a blanking area is provided within the sub-platform, and the reinforcing structure is arranged around the blanking area, with the area of ​​the blanking area of ​​the multiple sub-platforms decreasing sequentially from top to bottom.

[0009] Optionally, the empty area is located at the center of the receiving cavity.

[0010] Optionally, the lowest-level sub-platform is used to connect to the output end of the drive mechanism; In the receiving cavity of the lowest sub-platform, the empty area is located within the projection of the output end of the drive mechanism onto the sub-platform, and the reinforcing structure coincides with the projection portion of the output end of the drive mechanism onto the sub-platform.

[0011] Optionally, the reinforcing structure includes multiple stiffeners, which are arranged in a grid, radial, or U-shape.

[0012] Optionally, the stiffener includes a first reinforcing rib and a second reinforcing rib, the first reinforcing ribs of the plurality of stiffeners are spaced apart along a first direction, the second reinforcing ribs of the plurality of stiffeners are spaced apart along a second direction, the first direction and the second direction intersect, and the plurality of first reinforcing ribs and the plurality of second reinforcing ribs intersect to form a grid structure; In the first direction, the distance between two adjacent first reinforcing ribs gradually decreases from the center of the cavity to both ends; in the second direction, the distance between two adjacent second reinforcing ribs gradually decreases from the center of the cavity to both ends.

[0013] Optionally, the main body includes a first connector, a second connector, and a surrounding plate. The first connector and the second connector are arranged opposite to each other in the vertical direction. One end of the surrounding plate is arranged around the outer edge of the first connector, and the other end of the surrounding plate is arranged around the outer edge of the second connector. The first connector, the second connector, and the surrounding plate enclose the receiving cavity.

[0014] Optionally, the plurality of sub-platforms include at least a first sub-platform and a second sub-platform, the first sub-platform being disposed above the second sub-platform, the stiffness of the first sub-platform being less than the stiffness of the second sub-platform, and the projection of the enclosure of the first sub-platform and the enclosure of the second sub-platform in the vertical direction coinciding.

[0015] Optionally, the active platform further includes a heat insulation component disposed in the gap between the reinforcing structure and the inner wall of the receiving cavity.

[0016] On the other hand, this utility model embodiment provides a laminator, including a drive mechanism, a pressure plate assembly, and a movable platform as described in any of the preceding claims; The movable platform is connected to the output end of the drive mechanism, and the pressure plate assembly is disposed above the movable platform. The drive mechanism can drive the movable platform to reciprocate in the vertical direction. When the movable platform moves upward, the pressure plate assembly squeezes the workpiece to be processed.

[0017] Optionally, it also includes a frame, and an upper crossbeam and a lower crossbeam connected to the frame, with the pressure plate assembly and the movable platform disposed between the upper crossbeam and the lower crossbeam.

[0018] In the movable platform provided by this utility model embodiment, based on the force distribution law of the movable platform, the sub-platform adopts a stiffness gradient distribution design. The middle area of ​​the sub-platform, which experiences high stress, can generate moderate elastic deformation, while the perimeter of the sub-platform maintains sufficient stiffness to have strong resistance to deformation. By matching the stiffness distribution with the force law of the movable platform, a "strong perimeter, weak center" layout is formed. This can actively guide and disperse the huge concentrated thrust borne by the movable platform, effectively suppress the deformation of "protruding center and warped ends" caused by stress concentration in the middle, effectively offset the deformation differences in different areas, significantly improve the flatness and parallelism of the movable platform, and ensure the tight fit between the workpiece to be processed and the pressure plate assembly. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of an activity platform provided in an embodiment of the present utility model; Figure 2 This is a partial cross-sectional view of an active platform provided in an embodiment of the present invention; Figure 3 This is a side view of an active platform provided in an embodiment of the present utility model; Figure 4 yes Figure 3 Schematic diagram of the cross section along the AA direction; Figure 5 yes Figure 3 Schematic diagram of the cross section along the BB direction; Figure 6 This is a schematic diagram of a laminator provided in one embodiment of the present invention.

[0020] The reference numerals in the accompanying drawings are as follows: 10. Moving platform; 20. Pressure plate assembly; 30. Drive mechanism; 40. Frame; 50. Upper crossbeam; 60. Lower crossbeam; 1. Sub-platform; 1a. First sub-platform; 1b. Second sub-platform; 11. Main body; 111. Receiving cavity; 1111. Empty area; 112. First connector; 113. Second connector; 114. Enclosure; 115. Shelf; 12. Reinforcing structure; 121. First reinforcing rib; 122. Second reinforcing rib; a) First direction; b) Second direction; c) Vertical direction. Detailed Implementation

[0021] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0022] like Figures 1 to 5 As shown, an embodiment of the present invention provides a movable platform 10, which is used to cooperate with the pressure plate assembly 20 to extrude the workpiece during hot pressing. The movable platform 10 includes at least one sub-platform 1, which includes a main body 11 and a reinforcing structure 12. The main body 11 is provided with a receiving cavity 111, and the reinforcing structure 12 is disposed in the receiving cavity 111. The reinforcing structure 12 makes the rigidity of the sub-platform 1 increase from the center to the periphery.

[0023] In this embodiment, based on the force distribution law of the active platform 10, the sub-platform 1 is designed to form a stiffness gradient distribution by strengthening the structure 12. The middle area of ​​the sub-platform 1 with high stress can produce moderate elastic deformation, while the periphery of the sub-platform 1 maintains sufficient stiffness to have strong resistance to deformation.

[0024] By matching the stiffness distribution with the stress pattern of the movable platform 10, a "strong around the edges and weak in the middle" layout is formed. This can actively guide and disperse the huge concentrated thrust borne by the movable platform 10, effectively suppress the deformation of "protruding in the middle and warping at both ends" caused by stress concentration in the middle, effectively offset the deformation differences in different areas, significantly improve the flatness and parallelism of the movable platform 10, and ensure the tight fit between the workpiece to be processed and the pressure plate assembly 20.

[0025] The reinforcing structure 12 is placed in the receiving cavity 111 of the main body 11, which can enhance the stiffness of the main body 11. When the sub-platform 1 is distributed with stiffness gradient, the stiffness can be gradually increased from the inside to the outside through the reinforcing structure 12, or the stiffness can be gradually increased from the inside to the outside through the main body 11. Both of these methods can enable the sub-platform 1 to form the required stiffness gradient and accurately adapt to the force distribution requirements.

[0026] In practical applications, the aforementioned movable platform 10 is used in a hot press. The movable platform 10 is driven by the drive mechanism 30, moving towards the pressure plate assembly 20, thereby causing the pressure plate assembly 20 to press the workpiece. The driving force of the drive mechanism 30 is applied to the middle area of ​​the movable platform 10, where stress is relatively concentrated. Through the stiffness gradient distribution from the inside to the outside of the sub-platform 1, the force can be transmitted more evenly to the surrounding areas, avoiding excessive concentration of force in the middle area and reducing the root cause of unevenness in the pressure plate assembly 20.

[0027] In one embodiment, the stiffness of the reinforcing structure 12 gradually increases from the center of the sub-platform 1 outwards. By placing the reinforcing structure 12 in the receiving cavity 111 of the main body 11, the stiffness of the main body 11 can be enhanced. The reinforcing structure 12 adopts a gradient design with low stiffness in the middle and high stiffness around the edges, so that the stiffness of the sub-platform 1 forms a gradient distribution from the inside to the outside.

[0028] In one embodiment, multiple sub-platforms 1 are provided, and the multiple sub-platforms 1 are stacked in the vertical direction. The uppermost sub-platform 1 can abut against the pressure plate assembly 20, and the rigidity of the multiple sub-platforms 1 increases sequentially from top to bottom.

[0029] Multiple sub-platforms 1 are stacked vertically to form a stiffness gradient, resulting in an unequal stiffness gradient distribution in the vertical direction for the active platform 10. For example... Figure 3 As shown in the diagram, direction c is the vertical direction. During the hot pressing process, the uppermost sub-platform 1 directly contacts the pressure plate assembly 20. It has the lowest stiffness and can undergo moderate deformation under pressure, effectively absorbing the deformation of the lower sub-platform 1 under immense pressure. The stiffness of the lower sub-platform 1 gradually increases from top to bottom, with the lowest sub-platform 1 bearing the pressure and providing stable support for the upper structure. Through this gradient distribution in the vertical direction, deformation of the lower sub-platform 1 can be absorbed by the upper sub-platform 1, ultimately ensuring good flatness of the uppermost sub-platform 1 and guaranteeing flatness and parallelism during hot pressing.

[0030] As an example, multiple sub-platforms 1 are provided, with the stiffness of the multiple sub-platforms 1 increasing sequentially from top to bottom, and the stiffness of each sub-platform 1 increasing sequentially from the center outwards. By adjusting the vertical direction and the gradient distribution from the inside to the outside of the movable platform 10, the thrust can be further homogenized, so that the force can be evenly distributed on the top of the movable platform 10, and the pressure on each area of ​​the workpiece to be processed is more uniform, thus improving the flatness of the pressing.

[0031] In one embodiment, a blanking area 1111 is provided in the sub-platform 1, and a reinforcing structure 12 is provided around the blanking area 1111. The area of ​​the blanking areas 1111 of the multiple sub-platforms 1 decreases from top to bottom.

[0032] There is no reinforcing structure 12 in the empty area 1111. The larger the area of ​​the empty area 1111, the smaller the effective reinforcement area of ​​the sub-platform 1 and the lower the stiffness. The smaller the area, the larger the effective reinforcement area and the higher the stiffness. In this embodiment, the decreasing area of ​​the empty area 1111 from top to bottom corresponds to the gradual increase of the stiffness of the sub-platform 1, so that the active platform 10 forms a stiffness gradient in the vertical direction.

[0033] Among the multiple sub-platforms 1, the uppermost sub-platform 1 has the largest open area 1111 and the lowest stiffness, which can absorb the thrust deformation caused by pressure on the lower platform. The open area 1111 of the lowermost sub-platform 1 can be zero, that is, the middle area of ​​the lowermost sub-platform 1 is provided with a reinforcing structure 12. When pressure is applied to the lowermost sub-platform 1, the pressure can be dispersed and transferred to the upper layer through its gradient distribution from the inside out. The upper sub-platform 1 then disperses the pressure again, achieving homogenization.

[0034] In one specific embodiment, such as Figure 2, Figure 3 As shown, there are two sub-platforms 1, which are referred to as the first sub-platform 1a and the second sub-platform 1b respectively. The first sub-platform 1a is located above the second sub-platform 1b. The first sub-platform 1a can directly contact the pressure plate assembly 20, and the second sub-platform 1b is connected to the output end of the drive mechanism 30.

[0035] A void area 1111 is provided in the middle of the first sub-platform 1a. The area of ​​the void area 1111 of the second sub-platform 1b is zero or smaller than the area of ​​the void area 1111 of the first sub-platform 1a. The reinforcing area of ​​the reinforcing structure 12 of the second sub-platform 1b is larger than that of the reinforcing structure 12 of the first sub-platform 1a, making the stiffness of the first sub-platform 1a less than that of the second sub-platform 1b. The stiffness of the reinforcing structure 12 of the first sub-platform 1a gradually increases from the edge of the void area 1111 to the surrounding area, and the stiffness of the reinforcing structure 12 of the second sub-platform 1b gradually increases from the edge of the void area 1111 to the surrounding area. This results in the formation of unequal stiffness gradients in both directions of the double-layer structure movable platform 10, dispersing and homogenizing the pressure transmitted from the drive mechanism 30.

[0036] In one embodiment, the empty area 1111 is located at the center of the receiving cavity 111, so that the pressure can be evenly distributed from the center to the surrounding area, which is beneficial to the homogenization of the thrust of the top of the moving platform 10 on the pressure plate assembly 20.

[0037] In one embodiment, among the multiple sub-platforms 1, the lowest sub-platform 1 is used to connect the output end of the drive mechanism 30; in the receiving cavity 111 of the lowest sub-platform 1, the empty area 1111 is located within the projection of the output end of the drive mechanism 30 onto the sub-platform 1, and the reinforcing structure 12 coincides with the projection portion of the output end of the drive mechanism 30 onto the sub-platform 1.

[0038] The output end of the drive mechanism 30 is the core force-bearing point of the movable platform 10. The driving force needs to be transmitted upward layer by layer through the lowest sub-platform 1. In this embodiment, on the lowest sub-platform 1, by reducing the area of ​​the empty area 1111 to within the projection of the output end of the drive mechanism 30, the reinforcing structure 12 can be arranged in the projection area, thereby enhancing the structural strength of the core force-bearing point, reducing the deformation of the core force-bearing point, and guiding the driving force from the core force-bearing point to the surrounding area, thereby reducing local stress concentration.

[0039] like Figure 4 The diagram shows the projection of the lowest sub-platform 1 and the output end of the drive mechanism 30. The circle in the diagram represents the projection of the output end of the drive mechanism 30, and a reinforcing structure 12 is arranged within this projection area. Preferably, the portion of the reinforcing structure 12 located within the projection area is arranged along the diametrical direction, so that the driving force can be better transmitted to both ends.

[0040] In one embodiment, the reinforcing structure 12 includes multiple stiffeners arranged in a grid, radial, or U-shape. This structural distribution, with a sparse center and dense periphery, increases the stiffness of the sub-platform 1 from the center of the receiving cavity 111 outwards, thus matching the stress differences experienced by the sub-platform 1.

[0041] In one embodiment, the rib includes first reinforcing ribs 121 and second reinforcing ribs 122. The first reinforcing ribs 121 of the plurality of ribs are spaced apart along a first direction, and the second reinforcing ribs 122 of the plurality of ribs are spaced apart along a second direction. The first and second directions intersect, and the intersection of the plurality of first reinforcing ribs 121 and the plurality of second reinforcing ribs 122 forms a mesh-like reinforcing structure 12. In the first direction, the spacing between two adjacent first reinforcing ribs 121 gradually decreases from the center of the receiving cavity 111 towards both ends. In the second direction, the spacing between two adjacent second reinforcing ribs 122 gradually decreases from the center of the receiving cavity 111 towards both ends. Figure 4 As shown in the diagram, a represents the first direction and b represents the second direction.

[0042] By adjusting the spacing of multiple first reinforcing ribs 121 in the first direction and the spacing of multiple second reinforcing ribs 122 in the second direction, the first reinforcing ribs 121 and the second reinforcing ribs 122 are arranged with a large center spacing and a small end spacing. The multiple first reinforcing ribs 121 and the multiple second reinforcing ribs 122 intersect each other to form a grid-like reinforcing structure 12 with "sparse center and dense periphery". In this embodiment, the main body 11 is reinforced differently at various positions by reinforcing ribs with different degrees of sparseness, so that the sub-platform 1 forms a stiffness distribution that increases from the inside to the outside to adapt to the force difference of the sub-platform 1.

[0043] The height of the first reinforcing rib 121 is the same as the height of the receiving cavity 111, and the height of the second reinforcing rib 122 is the same as the height of the receiving cavity 111. The upper parts of the first reinforcing rib 121 and the upper parts of the second reinforcing rib 122 are welded to the top wall of the receiving cavity 111, and the lower parts of the first reinforcing rib 121 and the lower parts of the second reinforcing rib 122 are welded to the bottom wall of the receiving cavity 111.

[0044] The sub-platform 1 is formed by welding the main body 11 and the reinforcing structure 12, which ensures rigidity while enabling the lightweight design of the mobile platform 10.

[0045] In one embodiment, in the second sub-platform 1b, the number of first reinforcing ribs 121 is odd, and the main body 11 is symmetrically arranged with respect to the middle first reinforcing rib 121. The middle first reinforcing rib 121 can enter the projection of the output end of the drive mechanism 30, and can distribute and transmit the driving force.

[0046] The main body 11 is square, with a first reinforcing rib 121 extending along a second direction and a second reinforcing rib 122 extending along a first direction. The first reinforcing rib 121 and the second reinforcing rib 122 are perpendicular, and the length of the first reinforcing rib 121 is greater than the length of the second reinforcing rib 122. Due to the larger size of the first reinforcing rib 121, its two ends are farther from the center, and the second sub-platform 1b is connected to the output end of the drive mechanism 30. Therefore, by placing the first reinforcing rib 121 in the middle of the second sub-platform 1b on the axis of symmetry of its main body 11 in the second direction, it is beneficial to transmit the driving force in the second direction.

[0047] Relatively speaking, the size of the second reinforcing rib 122 is smaller than that of the first reinforcing rib 121. Therefore, the number of the second reinforcing ribs 122 can be odd, and the middle second reinforcing rib 122 is arranged on the axis of symmetry in the first direction of the main body 11. Alternatively, the number of the second reinforcing ribs 122 can be even, and the two middle second reinforcing ribs 122 are symmetrically arranged about the axis of symmetry in the first direction of the main body 11.

[0048] In one specific embodiment, such as Figure 4 The diagram shows the second sub-platform 1b. In the second sub-platform 1b, three first reinforcing ribs 121 are provided, numbered 1, 2, and 3 sequentially along the first direction. The second first reinforcing rib 121 is arranged along the axis of symmetry of the main body 11 in the second direction. The first and third first reinforcing ribs 121 are symmetrically arranged. The distance between the first and second first reinforcing ribs 121 is D0, and the distance between the first first reinforcing rib 121 and the main body 11 is D1, where D0 > D1.

[0049] Eight second reinforcing ribs 122 are provided, arranged symmetrically on both sides of the main body 11 along the axis of symmetry in the first direction, with four ribs on each side. They are numbered 1, 2, 3, and 4 sequentially along the second direction, with the first second reinforcing rib 122 being the closest to the axis of symmetry of the main body 11 along the first direction. The vertical distance between the axis of symmetry of the main body 11 along the first direction and the first second reinforcing rib 122 is L0, the vertical distance between the first and second second reinforcing ribs 122 is L1, the vertical distance between the second and third second reinforcing ribs 122 is L2, and the vertical distance between the second and fourth second reinforcing ribs 122 is L3, where L0 > L1 > L2 > L3.

[0050] like Figure 5 The diagram shows the first sub-platform 1a. In the first sub-platform 1a, there are two first reinforcing ribs 121 and four second reinforcing ribs 122. The effective reinforcing area is smaller than that of the second sub-platform 1b. The spacing distribution of the first reinforcing ribs 121 and the second reinforcing ribs 122 is the same as that of the second sub-platform 1b.

[0051] In one embodiment, the main body 11 includes a first connector 112, a second connector 113, and a surrounding plate 114. The first connector 112 and the second connector 113 are arranged opposite each other in the vertical direction. One end of the surrounding plate 114 is arranged around the outer edge of the first connector 112, and the other end of the surrounding plate 114 is arranged around the outer edge of the second connector 113. The first connector 112, the second connector 113, and the surrounding plate 114 enclose and form a receiving cavity 111.

[0052] The vertically opposite first connector 112 and second connector 113 provide a stable mounting reference, and the enclosure 114 is connected between the two to enclose a closed and regularly shaped receiving cavity 111.

[0053] The first connector 112 is positioned above the second connector 113. The surrounding plate 114 is welded to the first connector 112 and to the second connector 113. The surrounding plate 114, the second connector 113, and the main body 11 are all made of steel plates. Compared to existing single-piece steel plates, this significantly reduces the weight of the mobile platform 10 by more than 50% while maintaining structural strength and rigidity. It also reduces material costs and processing difficulty.

[0054] As an example, the activity platform 10 includes multiple sub-platforms 1, which can be assembled in the following three ways: 1) Multiple sub-platforms 1 are independent of each other. When two adjacent sub-platforms 1 are connected, the second connector 113 of the upper sub-platform 1 is fixed to the first connector 112 of the lower sub-platform 1, so that multiple sub-platforms 1 are connected into a whole. A partition 114 is provided between the first connector 112 and the second connector 113 of each sub-platform 1; 2) Two adjacent sub-platforms 1 have common parts. The second connector 113 of the upper sub-platform 1 can be directly used as the first connector 112 of the lower sub-platform 1, so as to achieve seamless connection between the upper and lower layers. Each sub-platform 1 has a partition 114 between the first connector 112 and the second connector 113; 3) The partitions 114 of multiple sub-platforms 1 are designed as an integrated unit. The integrated partition 114 is connected between the uppermost first connector 112 and the lowermost second connector 113. At the same time, multiple shelves 115 are provided between them. Through these shelves 115, the overall space can be divided into multiple layers, thereby forming multiple sub-platforms 1. In two adjacent sub-platforms 1, the shelf 115 can simultaneously serve as the upper second connector 113 and the lower first connector 112.

[0055] In one embodiment, the plurality of sub-platforms 1 include at least a first sub-platform 1a and a second sub-platform 1b. The first sub-platform 1a is disposed above the second sub-platform 1b. The stiffness of the first sub-platform 1a is less than that of the second sub-platform 1b. The projection of the enclosure 114 of the first sub-platform 1a and the enclosure 114 of the second sub-platform 1b in the vertical direction coincides.

[0056] The first sub-platform 1a and the second sub-platform 1b are stacked vertically to form a stiffness gradient, resulting in an unequal stiffness gradient distribution in the vertical direction of the movable platform 10. The reinforcing structure 12 in the first sub-platform 1a adopts a non-uniformly distributed grid structure, and the reinforcing structure 12 in the second sub-platform 1b also adopts a non-uniformly distributed grid structure. Furthermore, the effective reinforcement areas of the reinforcing structures 12 in the two sub-platforms 1 are different. Each of the two sub-platforms 1 forms a stiffness gradient distribution that increases from the inside out through the reinforcing structures 12, so that the driving force can be evenly distributed on the top of the movable platform 10, and the pressure borne by each area of ​​the workpiece is more uniform, thereby improving the flatness of the pressing.

[0057] The first sub-platform 1a is positioned at the top and abuts against the pressure plate assembly 20. The second sub-platform 1b is positioned at the bottom and connected to the output end of the drive mechanism 30. When the drive mechanism 30 generates a large thrust, the sparse mesh and low rigidity of the middle position of the second sub-platform 1b allow for elastic deformation. Through the guidance and dispersion of the mesh-like reinforcing structure 12, the driving force of the drive mechanism 30 is initially dispersed and transmitted to the first sub-platform 1a. The first sub-platform 1a, through the mesh-like reinforcing structure 12, disperses the thrust transmitted from the second sub-platform 1b to the surrounding area, further homogenizing the thrust. This allows the concentrated force of the drive mechanism 30 to be evenly distributed on the top of the movable platform 10, thereby improving the quality of the pressed product.

[0058] The first sub-platform 1a has a large open area 1111 in the middle, which is used to absorb the thrust deformation caused by the drive mechanism 30 to the second sub-platform 1b, thereby preventing the top surface of the movable platform 10 from deforming.

[0059] Preferably, in this embodiment, the enclosure 114 of the first sub-platform 1a and the enclosure 114 of the second sub-platform 1b are designed as an integrated unit.

[0060] In one embodiment, the movable platform 10 further includes a heat insulation element disposed in the gap between the reinforcing structure 12 and the inner wall of the receiving cavity 111, thereby providing heat insulation during hot pressing of the pressure plate assembly and protecting the movable platform. The thermal conductivity of the heat insulation element is less than 0.14 W / (m·K).

[0061] The insulation component is made of expanding foam, which can fill the gap between the reinforcing structure 12 and the inner wall of the receiving cavity 111, and can expel the gas inside the moving platform 10 while providing insulation.

[0062] On the other hand, such as Figure 6 As shown, this application embodiment also provides a laminator, including a drive mechanism 30, a pressure plate assembly 20, and a movable platform 10 of any of the above embodiments; the movable platform 10 is connected to the output end of the drive mechanism 30, the pressure plate assembly 20 is disposed above the movable platform 10, the drive mechanism 30 can drive the movable platform 10 to reciprocate in the vertical direction, and when the movable platform 10 moves upward, the pressure plate assembly 20 squeezes the workpiece to be processed.

[0063] The movable platform 10 is driven by the drive mechanism 30. When the movable platform 10 moves upward, it can drive the pressure plate assembly 20 to press the workpiece to be processed. After pressing is completed, the movable platform 10 moves downward to remove the pressed workpiece. The driving force of the drive mechanism 30 is applied to the middle area of ​​the movable platform 10, where the stress is relatively concentrated. Through the stiffness gradient distribution from the inside to the outside of the sub-platform 1, the force can be transmitted more evenly to the surrounding areas, avoiding excessive concentration of force in the middle area and reducing the root cause of unevenness of the pressure plate assembly 20.

[0064] In one embodiment, the pressure plate assembly 20 includes multiple laminates, and the workpiece to be processed is placed in the gap between two adjacent pressure plates. Driven by the drive mechanism 30, the laminates can be moved to compress the workpiece.

[0065] In one embodiment, the drive mechanism 30 is a hydraulic cylinder.

[0066] In one embodiment, the laminator further includes a frame 40, and an upper crossbeam 50 and a lower crossbeam 60 connected to the frame 40, with the platen assembly 20 and the movable platform 10 disposed between the upper crossbeam 50 and the lower crossbeam 60.

[0067] The upper crossbeam 50 and the lower crossbeam 60 are arranged parallel to each other and opposite to each other. Both the upper crossbeam 50 and the lower crossbeam 60 are bolted to the frame 40. The main function of the upper crossbeam 50 is to provide a top fixed support for the laminator with sufficient strength and meeting the flatness requirements. The frame 40, the upper crossbeam 50, and the lower crossbeam 60 constitute the load-bearing skeleton of the laminator. The three work together to provide high-strength support, which can withstand the pressure and impact during the hot pressing process.

[0068] The movable platform 10 is located above the drive mechanism 30, and the movable platform 10 is bolted to the output end of the drive mechanism 30. When the drive mechanism 30 drives the movable platform 10 to move upward, the movable platform 10 transmits thrust to the pressure plate assembly 20, providing the pressure required for forming the workpiece between multiple laminates.

[0069] The above-described 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 do 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, and should all be included within the protection scope of this utility model.

Claims

1. An activity platform, characterized in that, The movable platform is used to cooperate with the pressure plate assembly to press the workpiece to be processed. The movable platform includes at least one sub-platform. The sub-platform includes a main body and a reinforcing structure. The main body is provided with a receiving cavity. The reinforcing structure is disposed in the receiving cavity. The reinforcing structure makes the rigidity of the sub-platform increase from the center to the periphery.

2. The activity platform as described in claim 1, characterized in that, The stiffness of the reinforced structure gradually increases from the center of the sub-platform outwards.

3. The activity platform as described in claim 1, characterized in that, The sub-platform is provided in multiple layers, which are stacked vertically. The uppermost sub-platform can abut against the pressure plate assembly, and the rigidity of the multiple sub-platforms increases sequentially from top to bottom.

4. The activity platform as described in claim 3, characterized in that, The sub-platform is provided with a blanking area, and the reinforcing structure is arranged around the blanking area. The area of ​​the blanking area of ​​the multiple sub-platforms decreases from top to bottom.

5. The activity platform as described in claim 4, characterized in that, The empty area is located at the center of the receiving cavity.

6. The activity platform as described in claim 4, characterized in that, The lowest-level sub-platform is used to connect to the output end of the drive mechanism; In the receiving cavity of the lowest sub-platform, the empty area is located within the projection of the output end of the drive mechanism onto the sub-platform, and the reinforcing structure coincides with the projection portion of the output end of the drive mechanism onto the sub-platform.

7. The activity platform as described in claim 1, characterized in that, The reinforcing structure includes multiple stiffeners, which are arranged in a grid, radial, or U-shape.

8. The activity platform as described in claim 7, characterized in that, The rib includes a first reinforcing rib and a second reinforcing rib. The first reinforcing ribs of the plurality of ribs are spaced apart along a first direction, and the second reinforcing ribs of the plurality of ribs are spaced apart along a second direction. The first direction and the second direction intersect, and the plurality of first reinforcing ribs and the plurality of second reinforcing ribs intersect to form a grid structure. In the first direction, the distance between two adjacent first reinforcing ribs gradually decreases from the center of the cavity to both ends; in the second direction, the distance between two adjacent second reinforcing ribs gradually decreases from the center of the cavity to both ends.

9. The activity platform as described in claim 1, characterized in that, The main body includes a first connector, a second connector, and a surrounding plate. The first connector and the second connector are arranged opposite each other in the vertical direction. One end of the surrounding plate is arranged around the outer edge of the first connector, and the other end of the surrounding plate is arranged around the outer edge of the second connector. The first connector, the second connector, and the surrounding plate enclose the receiving cavity.

10. The activity platform as described in claim 9, characterized in that, The plurality of sub-platforms include at least a first sub-platform and a second sub-platform, the first sub-platform being disposed above the second sub-platform, the stiffness of the first sub-platform being less than the stiffness of the second sub-platform, and the projection of the enclosure of the first sub-platform and the enclosure of the second sub-platform in the vertical direction coinciding.

11. The activity platform as described in any one of claims 1-10, characterized in that, The active platform also includes a heat insulation component, which is disposed in the gap between the reinforcing structure and the inner wall of the receiving cavity.

12. A laminator, characterized in that, Includes a drive mechanism, a pressure plate assembly, and the active platform as described in any one of claims 1-11; The movable platform is connected to the output end of the drive mechanism, and the pressure plate assembly is disposed above the movable platform. The drive mechanism can drive the movable platform to reciprocate in the vertical direction. When the movable platform moves upward, the pressure plate assembly squeezes the workpiece to be processed.

13. The laminator as described in claim 12, characterized in that, It also includes a frame, and an upper crossbeam and a lower crossbeam connected to the frame, with the pressure plate assembly and the movable platform disposed between the upper crossbeam and the lower crossbeam.

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