Press-fit device and press-fit process of PCB (Printed Circuit Board)

Abstract

The invention relates to the technical field of PCB processing, in particular to a pressing device of a PCB and a pressing process of the pressing device. The pressing device of the PCB comprises a base, a support is fixedly connected to the base, a first hydraulic cylinder is fixedly installed at the top of the support, and a piston rod of the first hydraulic cylinder is fixedly connected with a hot pressing plate; the multi-layer laminating machine further comprises a discharging plate, the discharging plate is installed on the base through a second hydraulic cylinder, the discharging plate is used for stacking multiple layers of laminated raw material plates, and the base is provided with a positioning piece used for aligning the laminated plates stacked on the discharging plate. By means of the mounting frame driven by the air cylinder and the four-corner positioning angle blocks, accurate alignment of multiple layers of laminated boards can be achieved, in the hot pressing process, the extrusion piece pushes the hinged plate to drive the pushing and pressing roller to unfold and evenly push the multiple layers of boards on the discharging plate to be flat, the risk of warping and layering is reduced, and the quality of subsequent hot pressing of PCBs is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of PCB board processing, and in particular to a PCB board pressing device and a pressing process thereof. Background Art

[0002] With the development of electronic technology, the requirements for PCBs are getting higher and higher, especially in the fields of high-density interconnection, high-frequency signal transmission, etc. The traditional single-layer or double-layer panels can no longer meet the needs of complex circuits. Therefore, the application of multi-layer PCBs is becoming more and more extensive. With the emergence of multi-layer boards, especially in order to meet higher electrical performance and mechanical strength requirements, the pressing process has become more complicated, requiring more sophisticated equipment and technology to ensure reliable bonding between layers.

[0003] According to the invention with application publication number CN115209620A, a PCB board pressing process is disclosed, wherein a pressing assembly is arranged on the inner side of the working box, a recovery assembly is arranged below the pressing assembly, and a cooling assembly is arranged above the pressing assembly; the pressing assembly comprises a hydraulic rod installed in the middle of the inner cavity of the working box through a mounting plate and a support plate located below the hydraulic rod, and the support plate is laterally plugged into the lower part of the inner cavity of the working box; when the above-mentioned PCB board pressing process device places the lower copper foil, the prepreg, the core board layer and the upper copper foil in sequence, if there are no strict flatness control measures during the lamination process, it is easy to cause problems such as warping and delamination in the finished product, thereby affecting the pressing yield of the PCB board. Summary of the invention

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the present invention provides a PCB board pressing device and a pressing process thereof.

[0005] The technical solution is: a PCB board pressing device, comprising a base, the base is a load-bearing carrier of the pressing device, a bracket is fixedly connected to the base, a first hydraulic cylinder is fixedly installed on the top of the bracket, the piston rod of the first hydraulic cylinder is downward and fixedly connected to a hot pressing plate, the hot pressing plate is an existing technology for hot pressing PCB boards; it also includes a discharge plate, the discharge plate is installed on the base through a second hydraulic cylinder, the discharge plate is used to stack multiple layers of pressed raw material plates, the base is provided with a positioning piece for aligning the stacked pressed plates on the discharge plate, guide rails are symmetrically provided on the front and back sides of the bottom of the bracket, the guide rails of the bracket are symmetrically divided into left and right sections, and the left and right guide rails of the bracket are symmetrically slidably connected by a connecting shaft. A pushing roller is connected, and a square block is fixedly provided at the lower part of the side where the two pushing rollers are close to each other, and the square block of the pushing roller is in sliding contact with the discharge plate, and hinge plates are symmetrically connected to the connecting shafts of the pushing rollers on both sides, and the plate bodies at the upper middle parts of the two hinged plates are cross-hinged into one body through a hinge shaft, and a torsion spring is provided between the hinge plate and the hinge shaft; an extrusion piece for pressing the hinge plate is provided on the plate body of the hot pressing plate, and the extrusion piece includes a guide frame symmetrically fixed to the front and rear sides of the plate body of the hot pressing plate, and a guide rod is fixed in the slide groove on the guide frame, and an extrusion block is slidably installed on the guide frame through the guide rod, and the extrusion block is a trapezoidal block and contacts the upper plate bodies of the two hinged plates on the same side, and a spring is provided between the guide frame and the extrusion block.

[0006] In a preferred embodiment of the present invention, the positioning member includes a cylinder, a mounting frame and a positioning angle block. The cylinder is fixedly installed on the top surface of the base, the piston rod of the cylinder faces upward and is fixedly connected to the mounting frame, and positioning angle blocks are horizontally fixed at the four corners of the mounting frame. The positioning angle blocks slide and fit the four corners of the unloading plate. The positioning angle blocks of the mounting frame can align the four corners of the multi-layer stacked plates on the unloading plate to the center, thereby improving the neatness of the stacking of the multi-layer plates on the unloading plate.

[0007] In a preferred embodiment of the present invention, a cutting assembly is provided on the base, and the cutting assembly is used to cut the PP molten material extruded from the edge of the laminated PCB board. The cutting assembly includes a mounting frame, an electric slide rail and a cutter. The mounting frame is fixed to the base through a connecting plate. The mounting frame is a square frame and is located at the periphery of the discharge plate. Electric slide rails are provided in the four sides of the mounting frame. Cutters are installed on the electric slide rails through sliders. The cutters are circumferentially distributed at the four corners of the mounting frame. After the second hydraulic cylinder drives the laminated PCB board on the discharge plate to be flush with the cutter on the mounting frame, the electric slide rail is enabled to drive the corresponding cutter to synchronously cut off the excess PP molten material extruded from the edge of the PCB board.

[0008] In a preferred embodiment of the present invention, a collecting component is further provided on the base, and the collecting component is used to collect the PP offcuts cut by the cutter. The collecting component includes a collecting frame, an inner guide plate and an outer guide plate. The top surface of the base is fixedly provided with a collecting frame, and the collecting frame is a frame body with a top opening and is located directly below the mounting frame. The inner guide plate is installed on the inner side of the top opening of the collecting frame, and the outer guide plate is installed on the outer side of the top opening of the collecting frame. The inner guide plate and the outer guide plate are inclined toward the top opening of the collecting frame.

[0009] In a preferred embodiment of the present invention, a blowing fan is fixedly installed at a corner of the collecting groove of the collecting frame through a support plate, the blowing fan faces the collecting groove of the collecting frame, and a section of dense air outlet holes is opened on the frame body of the collecting frame on the side away from the blowing fan. The blowing fan is used to concentrate the PP cuttings in the collecting frame, and the blowing fan blows out airflow unidirectionally in the collecting groove of the collecting frame, so that the airflow can drive the PP cuttings to gather at the collecting groove at the air outlet of the collecting frame, thereby facilitating the subsequent cleaning of the PP cuttings in the collecting frame.

[0010] In a preferred embodiment of the present invention, the inner guide plate and the outer guide plate are both placed in a snap-on manner and detachably installed at the top opening of the collection frame. After the inner guide plate and the outer guide plate are removed from the top of the collection frame, it is convenient for the user to insert a cleaning tool into the collection groove of the collection frame to clean out the PP cut materials.

[0011] In a preferred embodiment of the present invention, a mounting shell is installed outside the axial roller body of the pushing roller, and a plurality of electric heating rods are electrically integrated on the mounting shell. The electric heating rods are embedded in the roller body of the pushing roller. The electric heating rods are used to appropriately heat the pushing roller so that the pushing roller is raised to a certain temperature before pre-pressing each layer of the plate material. The pre-pressing can make the layers of the plate material initially bonded together.

[0012] A PCB lamination process includes the following steps: S1, stack the copper foil, prepreg and core board layers on the unloading board in sequence, start the cylinder to adjust the height of the mounting frame, so that the four corner positioning corner blocks fit the edge of the unloading board and align the multi-layered boards, and then the second hydraulic cylinder lifts the unloading board so that the aligned boards contact the square block at the bottom of the push roller; S2, the first hydraulic cylinder drives the hot pressing plate to move downward, the trapezoidal extrusion block on the guide frame presses the hinge plate, and under the guidance of the hinge shaft and the guide rail, the push rollers on both sides expand outward, cooperate with the electric heating rod to heat the push rollers and pre-press the plate simultaneously, and the push rollers are separated from the plate after they are fully expanded, and the hot pressing plate continues to press down and compress the spring, applying high temperature and high pressure to complete the pressing of the multi-layer PCB plate; S3. After the pressing is completed, the second hydraulic cylinder drives the unloading plate to rise to the height of the cutting assembly. The electric slide rail drives the four-corner cutter to synchronously cut off the PP molten material overflowing from the edge of the PCB. The PP cut materials slide into the collection frame along the inner guide plate and the outer guide plate. The blowing fan is started to blow the cut materials to the air outlet in the collection frame for centralized accumulation. After removing the guide plate, the collection frame can be cleaned.

[0013] The beneficial effects are: 1. The present invention can realize the precise alignment of multi-layer pressed sheets through the cylinder-driven mounting frame and the four-corner positioning corner blocks. During the hot pressing process, the extrusion member pushes the hinged plate to drive the pushing roller to expand, and evenly pushes the multi-layer sheets on the material plate to reduce the risk of warping and delamination, and improves the quality of subsequent hot pressing PCB boards.

[0014] 2. The present invention can drive the cutter to synchronously cut off the excess PP molten material at the edge of the PCB board through the electric slide rail, so as to realize automatic trimming of the edge of the PCB board, and then use the collection component to synchronously collect the cut PP cuttings, and concentrate them through the action of the blowing fan, so as to facilitate the subsequent cleaning work.

[0015] 3. The push roller of the present invention is equipped with an electric heating rod, which heats the push roller in the pre-pressing stage to make the layers of board initially bonded, increase the contact area between the board layers, and enhance the structural stability of the finished PCB board after pressing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0017] Figure 2 It is a schematic diagram of the base, bracket, hot pressing plate, unloading plate and pushing roller of the present invention.

[0018] Figure 3 This is a connection diagram of the push roller, connecting shaft, hinge plate, hinge shaft and other components of the present invention.

[0019] Figure 4 It is a three-dimensional structural schematic diagram of the specific components of the hot pressing plate and the extrusion part of the present invention.

[0020] Figure 5 It is a three-dimensional structural schematic diagram of the unloading plate, cylinder, mounting frame and positioning angle block of the present invention.

[0021] Figure 6 This is a positional relationship diagram of the components such as the installation frame, the electric slide rail cutter and the collection frame of the present invention.

[0022] Figure 7 For the present invention Figure 6 Enlarged view of point A in the middle.

[0023] Figure 8 It is a schematic diagram of the installation frame, cutter, collection frame, inner guide plate and outer guide plate of the present invention.

[0024] Fig. 9 It is an exploded view of the collecting frame and the inner guide plate of the present invention.

[0025] Fig.10 This is a connection diagram of the push roller, square block, electric heating rod and mounting shell of the present invention.

[0026] Explanation of the reference numerals: 1-base, 2-bracket, 21-guide rail, 3-first hydraulic cylinder, 4-hot pressing plate, 5-discharging plate, 51-second hydraulic cylinder, 6-pushing roller, 61-connecting shaft, 611-square block, 62-hinge plate, 63-hinge shaft, 64-torsion spring, 7-extrusion piece, 71-guide frame, 72-guide rod, 73-extrusion block, 74-spring, 8-positioning piece, 81-cylinder, 82-mounting frame, 83-positioning corner block, 9-cutting assembly, 91-mounting frame, 911-connecting plate, 92-electric slide rail, 93-cutter, 931-slider, 10-collecting assembly, 101-collecting frame, 102-inner guide plate, 103-outer guide plate, 11-blowing fan, 111-air outlet, 12-electric heating rod, 13-mounting shell. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0028] Embodiment 1: A PCB board pressing device, such as Figure 1-Figure 5As shown, it includes a base 1, which is a load-bearing carrier of the pressing device. A bracket 2 is fixedly connected to the base 1. A first hydraulic cylinder 3 is fixedly installed on the top of the bracket 2. The piston rod of the first hydraulic cylinder 3 faces downward and is fixedly connected to a hot pressing plate 4. The hot pressing plate 4 is an existing technology for hot pressing PCB boards; it also includes a discharge plate 5, which is installed on the base 1 through a second hydraulic cylinder 51. The discharge plate 5 is used to stack multi-layer pressed raw material plates. A positioning member 8 for aligning the stacked pressed plates on the discharge plate 5 is provided on the base 1. Guide rails 21 are symmetrically provided on the front and back sides of the bottom of the bracket 2. The guide rails 21 of the bracket 2 are symmetrically divided into left and right sections. The left and right guide rails 21 of the frame 2 are symmetrically slidably connected to the push rollers 6 through a connecting shaft 61. A square block 611 is fixedly provided at the lower part of the side where the two push rollers 6 are close to each other. The square block 611 of the push roller 6 is in sliding contact with the discharge plate 5. The connecting shafts 61 of the push rollers 6 on both sides are symmetrically connected with hinged plates 62. The upper plate bodies of the two hinged plates 62 are cross-hinged into one body through a hinge shaft 63. A torsion spring 64 is provided between the hinged plate 62 and the hinge shaft 63. An extrusion piece 7 for pressing the hinged plate 62 is provided on the plate body of the hot press plate 4. The extrusion piece 7 includes a guide frame 71 symmetrically fixed to the front and rear sides of the plate body of the hot press plate 4. The guide frame 71 has a plurality of guide frames 71 on each side. A guide rod 72 is fixed in the slide groove, and an extrusion block 73 is slidably installed on the guide frame 71 through the guide rod 72. The extrusion block 73 is a trapezoidal block and contacts the upper plate body of the two hinged plates 62 on the same side. A spring 74 is provided between the guide frame 71 and the extrusion block 73. The second hydraulic cylinder 51 drives the discharge plate 5 to descend to the positioning member 8, and the copper foil, prepreg and core plate layers and other laminated plates can be stacked on the discharge plate 5 in sequence. The multi-layer laminated plates can be aligned and positioned by the positioning member 8. The second hydraulic cylinder 51 drives the discharge plate 5 to lift and make the aligned plates upwardly adhere to the square block 611 of the push roller 6. The first hydraulic cylinder 3 drives the hot pressing plate During the downward pressing process, the extrusion block 73 presses downward the upper parts of the two hinge plates 62 on the same side, so that the hinge plates 62 rotate around the hinge shaft 63. At the same time, under the guidance of the guide rail 21 of the bracket 2, the lower plate body of the hinge plate 62 can drive the corresponding pushing roller 6 to expand outward, and the square blocks 611 on the pushing rollers 6 on both sides synchronously push the multi-layered sheet on the discharge plate 5, so as to flatten the multi-layered sheet on the discharge plate 5. After the pushing rollers 6 on both sides are opened, they will be separated from the discharge plate 5. At this time, the hot pressing plate 4 can compress the spring 74 between the extrusion blocks 73 and continue to press the multi-layered sheet on the discharge plate 5 to prevent the pressed product from warping and delamination.

[0029] like Figure 2 and Figure 5As shown, the positioning member 8 includes a cylinder 81, a mounting frame 82 and a positioning angle block 83. The cylinder 81 is fixedly installed on the top surface of the base 1, and the piston rod of the cylinder 81 faces upward and is fixedly connected to the mounting frame 82. Positioning angle blocks 83 are horizontally fixed at the four corners of the mounting frame 82. The positioning angle blocks 83 slide and fit the four corners of the discharge plate 5. The positioning angle blocks 83 of the mounting frame 82 can align the four corners of the multi-layer stacked plates on the discharge plate 5 to improve the neatness of the stacking of the multi-layer plates on the discharge plate 5. After the cylinder 81 drives the mounting frame 82 to rise and fall and change the distance between it and the discharge plate 5, the positioning distance of the positioning angle block 83 on the discharge plate 5 can be changed accordingly, so as to adapt to the alignment of stacked plates of different thicknesses.

[0030] like Figure 1 and Fig.10 As shown, a mounting shell 13 is assembled outside the axial roller body of the pushing roller 6, and a plurality of electric heating rods 12 are electrically integrated on the mounting shell 13. The electric heating rods 12 are embedded in the roller body of the pushing roller 6. The electric heating rods 12 are used to properly heat the pushing roller 6, so that the pushing roller 6 is raised to a certain temperature before pre-pressing each layer of the plate. Through pre-pressing, each layer of the plate can be initially bonded together, increasing the contact area between the plate layers, providing a better foundation for subsequent high-temperature and high-pressure hot pressing.

[0031] When the device is used to press the PCB board, the operator first controls the second hydraulic cylinder 51 to lower the unloading plate 5 to the positioning piece 8 on the base 1. At the same time, the cylinder 81 drives the mounting frame 82 to rise and fall. The mounting frame 82 adjusts the height of the four-corner positioning corner blocks 83 so that the positioning corner blocks 83 fit and protrude at the edge of the unloading plate 5 to a suitable positioning height. Then, the copper foil, prepreg and core board layers are stacked on the unloading plate 5 in sequence. The specific operation is that the copper foil is laid flat on the bottom layer as the outer conductive material, the prepreg is centered and serves as the adhesive layer, and the core board is covered on the upper layer of the prepreg. During the stacking process, the four corner positioning blocks 83 are positioned on the unloading plate 5 and align the multi-layer plates to ensure that the circuit patterns of each layer are accurately aligned in the horizontal direction. After the alignment is completed, the second hydraulic cylinder 51 is activated and the unloading plate 5 is lifted to the initial height so that the top of the plate contacts the square block 611 at the bottom of the pushing roller 6. Then the hot pressing begins. The first hydraulic cylinder 3 drives the hot pressing plate 4 to start pressing down. At this time, the guide frames 71 on both sides of the hot pressing plate 4 move down synchronously. The trapezoidal extrusion blocks 73 on the guide frames 71 slide along the guide rods 72 and press the upper part of the hinged plate 62. Since the hinged plate 62 is connected by the hinge shaft 63 is cross-connected and has a torsion spring 64. Under the inclined thrust of the extrusion block 73, the hinge plate 62 will overcome the elastic force of the torsion spring 64, rotate outward with the hinge shaft 63 as the center, and drive the pushing rollers 6 on both sides to slide synchronously outward along the guide rail 21 of the bracket 2. During the pushing process, the roller body of the pushing roller 6 can be preheated to a suitable pre-pressing temperature by the electric heating rod 12. The square block 611 on the pushing roller 6 applies a uniform lateral pre-pressure to the multi-layer sheet material, discharges the air between the layers and preliminarily bonds the materials, avoids warping between the sheets, and prevents subsequent hot pressing. When the pushing roller 6 is fully extended to the end of the guide rail 21, the pushing roller 6 and the square block 611 will separate from the plate on the discharge plate 5, and the hot pressing plate 4 continues to press down and compress the spring 74 in the guide frame 71. At this time, the hot pressing plate 4 will be pressed on the plate on the discharge plate 5. The internal heating module of the hot pressing plate 4 is rapidly increased to the pressing temperature, so that the epoxy resin in the semi-cured sheet melts and flows, fully filling the gap between the copper foil and the core board. After a period of high temperature and high pressure, the resin is cured to form a rigid insulating layer, and finally the integrated pressing of the multi-layer PCB is completed.

[0032] Embodiment 2: Based on embodiment 1, Figure 1 , Figure 6 and Figure 7As shown, a cutting assembly 9 is provided on the base 1, and the cutting assembly 9 is used to cut the PP molten material extruded from the edge of the pressed PCB board. The cutting assembly 9 includes a mounting frame 91, an electric slide rail 92 and a cutter 93. The mounting frame 91 is fixed to the base 1 through a connecting plate 911. The mounting frame 91 is a square frame and is located at the periphery of the discharge plate 5. Electric slide rails 92 are provided in the four frames of the mounting frame 91. Cutters 93 are installed on the electric slide rails 92 through sliders 931. The cutters 93 are circumferentially distributed at the four corners of the mounting frame 91. After the second hydraulic cylinder 51 drives the pressed PCB board on the discharge plate 5 to be flush with the cutter 93 on the mounting frame 91, the electric slide rail 92 is enabled to drive the corresponding cutter 93 to synchronously cut off the excess PP molten material extruded from the edge of the PCB board to ensure the flatness of the edge of the PCB board after pressing.

[0033] like Figure 1 and Figure 8 As shown, a collecting component 10 is also provided on the base 1, and the collecting component 10 is used to collect the PP offcuts cut by the cutter 93. The collecting component 10 includes a collecting frame 101, an inner guide plate 102 and an outer guide plate 103. The top surface of the base 1 is fixedly provided with the collecting frame 101, and the collecting frame 101 is a frame body with a top opening and is located directly below the mounting frame 91. The inner guide plate 102 is installed on the inner side of the top opening of the collecting frame 101, and the outer guide plate 103 is installed on the outer side of the top opening of the collecting frame 101. The inner guide plate 102 and the outer guide plate 103 are inclined toward the top opening of the collecting frame 101, and the inner guide plate 102 and the outer guide plate 103 are used to slide and guide the cut PP offcuts into the collecting frame 101.

[0034] like Figure 8 and Fig. 9 As shown, a blowing fan 11 is fixedly installed at a corner of the collecting groove of the collecting frame 101 through a support plate, and the blowing fan 11 faces the collecting groove side of the collecting frame 101. A section of dense air outlet holes 111 is opened on the frame body of the collecting frame 101 on the side away from the blowing fan 11. The blowing fan 11 is used to concentrate the PP cuttings in the collecting frame 101, and the airflow is blown out unidirectionally in the collecting groove of the collecting frame 101 by the blowing fan 11, so that the airflow can drive the PP cuttings to gather at the collecting groove of the collecting frame 101 at the air outlet holes 111, thereby facilitating the subsequent cleaning of the PP cuttings in the collecting frame 101; the inner guide plate 102 and the outer guide plate 103 are both placed in a snap-on manner and can be detachably installed at the top opening of the collecting frame 101. After the inner guide plate 102 and the outer guide plate 103 are removed from the top of the collecting frame 101, it is convenient for the user to extend the cleaning tool into the collecting groove of the collecting frame 101 to clean out the PP cuttings.

[0035] After the pressing and forming, the first hydraulic cylinder 3 first drives the hot pressing plate 4 to reset upwards. At this time, the hinged plate 62 without the pressure of the extrusion block 73 will be propped up and reset under the action of the torsion spring 64. Then the second hydraulic cylinder 51 drives the unloading plate 5 to carry the pressed PCB board to the height of the cutting assembly 9, so that the semi-cured sheet molten material (PP material) overflowing from the edge of the PCB board is aligned with the cutter 93 on the installation frame 91. The electric slide rail 92 starts and drives the four-corner cutter 93 to move synchronously around the PCB board, thereby synchronously cutting off the excess PP material extruded from the four sides of the PCB board to ensure that the PC The edge of B is flat, and the cut PP cuttings fall naturally due to gravity, and are guided into the collection frame 101 by the inclined surfaces of the inner guide plate 102 and the outer guide plate 103. The collection frame 101 uses a unidirectional airflow blown by the blowing fan 11 to blow the scattered PP fragments to the side of the air outlet 111 of the collection frame 101, so that the PP cuttings are concentrated and accumulated in the corner of the collection tank. When the collection is completed, the operator can manually remove the snap-on installed inner guide plate 102 and the outer guide plate 103, and directly use a vacuum cleaner or a scraper to clean the PP cuttings in the collection tank, thereby shortening the cleaning and maintenance time.

[0036] A PCB lamination process includes the following steps: S1, stack the laminated sheets such as copper foil, prepreg and core board layer on the unloading plate 5 in sequence, start the cylinder 81 to adjust the height of the mounting frame 82, so that the four corner positioning corner blocks 83 are attached to the edge of the unloading plate 5 and align the multi-layer sheets, and then the second hydraulic cylinder 51 lifts the unloading plate 5 so that the aligned sheets contact the square block 611 at the bottom of the push roller 6; S2, the first hydraulic cylinder 3 drives the hot pressing plate 4 to move downward, the trapezoidal extrusion block 73 on the guide frame 71 presses the hinge plate 62, and under the guidance of the hinge shaft 63 and the guide rail 21, the push rollers 6 on both sides expand outward, cooperate with the electric heating rod 12 to heat the push rollers 6 and pre-press the sheet synchronously, and the push rollers 6 are separated from the sheet after they are fully expanded, and the hot pressing plate 4 continues to press down and compress the spring 74, applying high temperature and high pressure to complete the pressing of the multi-layer PCB sheet; S3. After the pressing is completed, the second hydraulic cylinder 51 drives the discharge plate 5 to rise to the height of the cutting assembly 9, and the electric slide rail 92 drives the four-corner cutter 93 to synchronously cut off the PP molten material overflowing from the edge of the PCB. The PP cut materials slide into the collection frame 101 along the inner guide plate 102 and the outer guide plate 103, and the blowing fan 11 is started to blow the cut materials to the air outlet 111 in the collection frame 101 for centralized accumulation. After removing the guide plate, the collection frame 101 can be cleaned.

[0037] Those skilled in the art should understand that the above embodiments do not limit the present invention in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation shall fall within the protection scope of the present invention.

Claims

1. A PCB board pressing device, comprising a base (1), a bracket (2) fixedly connected to the base (1), a first hydraulic cylinder (3) fixedly mounted on the top of the bracket (2), and a hot pressing plate (4) fixedly connected to the first hydraulic cylinder (3); Its characteristics are: It also comprises a material discharge plate (5), the material discharge plate (5) being mounted on the base (1) via a second hydraulic cylinder (51), the base (1) being provided with a positioning member (8) for aligning the stacked pressed plates on the material discharge plate (5), the bottom front and rear sides of the bracket (2) being symmetrically provided with two sections of guide rails (21), the left and right guide rails (21) of the bracket (2) being slidably connected to a push roller (6) via a connecting shaft (61), a square block (611) being fixedly provided at the lower part of the push roller (6), the square block (611) of the push roller (6) being in sliding contact with the material discharge plate (5), hinge plates (62) being symmetrically connected to the connecting shafts (61) of the push rollers (6) on both sides, the two hinge plates (62) being cross-hinged into one body via a hinge shaft (63), and a torsion spring (64) being provided between the hinge plate (62) and the hinge shaft (63); The plate body of the hot pressing plate (4) is provided with an extrusion member (7) for pressing the hinged plate (62), and the extrusion member (7) includes a guide frame (71) symmetrically fixed to the front and rear sides of the plate body of the hot pressing plate (4), a guide rod (72) is fixed in a slide groove on the guide frame (71), and an extrusion block (73) is slidably installed on the guide frame (71) through the guide rod (72), and the extrusion block (73) is in contact with the upper plate body of the hinged plate (62) on the same side, and a spring (74) is provided between the guide frame (71) and the extrusion block (73).

2. A PCB board pressing device according to claim 1, characterized in that: The positioning member (8) comprises a cylinder (81), a mounting frame (82) and a positioning angle block (83); the cylinder (81) is fixedly mounted on the top surface of the base (1); the piston rod of the cylinder (81) is fixedly connected to the mounting frame (82); positioning angle blocks (83) are horizontally fixed at the four corners of the mounting frame (82); the positioning angle blocks (83) are slidably fitted to the four corners of the discharge plate (5).

3. A PCB board pressing device according to claim 2, characterized in that: The base (1) is provided with a cutting assembly (9), the cutting assembly (9) being used for cutting PP molten material extruded from the edge of a pressed PCB board, the cutting assembly (9) comprising a mounting frame (91), an electric slide rail (92) and a cutter (93), the mounting frame (91) being fixedly connected to the base (1) via a connecting plate (911), the mounting frame (91) being a square frame and being located at the periphery of a material discharge plate (5), the four frames of the mounting frame (91) being provided with electric slide rails (92), the electric slide rails (92) being provided with cutters (93) via sliders (931), the cutters (93) being circumferentially distributed at the four corners of the mounting frame (91).

4. A PCB board pressing device according to claim 3, characterized in that: The base (1) is also provided with a collecting assembly (10), the collecting assembly (10) being used to collect PP offcuts cut by the cutter (93), the collecting assembly (10) comprising a collecting frame (101), an inner guide plate (102) and an outer guide plate (103), the top surface of the base (1) being fixedly provided with the collecting frame (101), the collecting frame (101) being a frame body with a top opening and being located directly below the mounting frame (91), the inner guide plate (102) being installed on the inner side of the top opening of the collecting frame (101), the outer guide plate (103) being installed on the outer side of the top opening of the collecting frame (101), the inner guide plate (102) and the outer guide plate (103) being inclined towards the top opening of the collecting frame (101).

5. A PCB board pressing device according to claim 4, characterized in that: A blowing fan (11) is fixedly mounted at one corner of the collecting slot of the collecting frame (101) via a support plate. The blowing fan (11) faces the collecting slot of the collecting frame (101). A section of dense air outlet holes (111) is provided on a side of the collecting frame (101) facing away from the blowing fan (11). The blowing fan (11) is used to gather the PP cut materials in the collecting frame (101).

6. A PCB board pressing device according to claim 5, characterized in that: The inner guide plate (102) and the outer guide plate (103) are both placed in a snap-fit ​​manner and detachably mounted at the top opening of the collection frame (101).

7. A PCB board pressing device according to claim 6, characterized in that: The axial roller body of the push roller (6) is equipped with a mounting shell (13), and a plurality of electric heating rods (12) are electrically integrated on the mounting shell (13). The electric heating rods (12) are embedded in the roller body of the push roller (6), and the electric heating rods (12) are used to appropriately heat the push roller (6).

8. A PCB pressing process, using the PCB pressing device according to claim 7, characterized in that: The following steps are involved: S1, stacking the laminated sheets such as copper foil, prepreg and core sheet layers on the unloading plate (5) in sequence, starting the cylinder (81) to adjust the height of the mounting frame (82) so that the four corner positioning corner blocks (83) are in contact with the edge of the unloading plate (5) and align the multi-layer sheets, and then the second hydraulic cylinder (51) lifts the unloading plate (5) so that the aligned sheets contact the square block (611) at the bottom of the push roller (6); S2, the first hydraulic cylinder (3) drives the hot pressing plate (4) to move downward, the trapezoidal extrusion block (73) on the guide frame (71) presses the hinge plate (62), and under the guidance of the hinge shaft (63) and the guide rail (21), the push rollers (6) on both sides are expanded outward, and the electric heating rod (12) is used to heat the push rollers (6) and simultaneously pre-press the plate. After the push rollers (6) are fully expanded, they are separated from the plate, and the hot pressing plate (4) continues to press downward and compress the spring (74), applying high temperature and high pressure to complete the pressing of the multi-layer PCB plate; S3. After the pressing is completed, the second hydraulic cylinder (51) drives the unloading plate (5) to rise to the height of the cutting assembly (9), and the electric slide rail (92) drives the four-corner cutter (93) to synchronously cut off the PP molten material overflowing from the edge of the PCB. The PP cut materials slide into the collection frame (101) along the inner guide plate (102) and the outer guide plate (103). The blowing fan (11) is started to blow the cut materials to the air outlet (111) in the collection frame (101) for centralized accumulation. After the guide plates are removed, the collection frame (101) can be cleaned.

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