Circuit board laminating process

Abstract

The invention relates to the field of circuit board production, in particular to a circuit board laminating process. According to the circuit board laminating process, a circuit board laminating machine is used for carrying out laminating treatment on a plurality of layers of circuit boards, and reel-shaped prepregs are automatically pulled out through the circuit board laminating machine and are alternately stacked among four L-shaped limiting rods together with inner-layer core boards; the inner layer core plates and the prepregs which are stacked in sequence are pressed together through the pressing plate, meanwhile, the two sides of the prepregs are cut off through the cutters, waste of prepreg materials is reduced, and the defects that in the treatment process of alternately stacking the multiple layers of inner layer core plates and the multiple layers of prepregs, the placement accuracy is poor, and the placement efficiency is high are overcome. And generally, after being stacked, cutting is performed according to an edge area with a standard size to form a finished product with a standard size, so that the technical defects that a circle of prepregs around the finished product and an inner-layer core plate material are wasted are caused by the treatment method.

Description

Technical Field

[0001] The present invention relates to the field of circuit board production, and in particular to a circuit board lamination process. Background Art

[0002] In the lamination process of multi-layer circuit boards, multiple layers of inner core boards and multiple layers of prepregs need to be alternately stacked together. This step requires manual stacking, but the manual stacking process is inefficient and has poor placement accuracy. It cannot ensure that the edges of each layer of inner core board and prepreg are aligned with each other. Therefore, the commonly used treatment method in the existing technology is to make the area of ​​each prepreg and inner core board used exceed the standard area size. After stacking, they are cut according to the edge area of ​​the standard size. After the excess area is cut off, a stacking state with standard size and accurate edge alignment is formed. This treatment method is effective but will cause a circle of prepreg and inner core board material waste around the finished product. Summary of the Invention

[0003] In order to overcome the disadvantage that the placement accuracy is poor during the process of alternately stacking multiple layers of inner core boards and multiple layers of prepregs, which results in the use of materials exceeding the standard area for stacking, and then cutting off the excess to pursue stacking accuracy, resulting in a large amount of prepreg material and inner core board material being cut and wasted, the present invention provides a circuit board lamination process.

[0004] The technical solution is as follows: a circuit board laminating process, which uses a circuit board laminating machine to perform lamination processing of multi-layer circuit boards. The circuit board laminating machine includes a support platform, a waste box, a press, a pressing plate, a cutter, an electric unwinding roller, a semi-cured sheet, an electric double conveying roller, an L-shaped limit rod, a connecting frame, a lower electric push rod and a pulling component; a press is installed on the support platform; a pressing plate is provided on the pressing part of the press; a cutter is fixed to the left and right sides of the pressing plate; an electric unwinding roller is installed on the support platform; a roll-shaped semi-cured sheet is wound on the electric unwinding roller; the support platform The upper portion is provided with an electric double conveying roller for conveying the semi-cured sheet; four L-shaped limit rods distributed in a matrix state are slidably connected to the support table; a connecting frame is fixedly connected between the four L-shaped limit rods; a lower electric push rod is installed on the support table to drive the connecting frame to move up and down; the telescopic end of the lower electric push rod is fixedly connected to the connecting frame; a cutting groove structure which is aligned with the upper and lower sides of the cutter is provided on the L-shaped limit rod; a pulling component for pulling out the semi-cured sheet is commonly connected between the two L-shaped limit rods on the front side; a pulling component for pulling out the semi-cured sheet is also commonly connected between the two L-shaped limit rods on the rear side.

[0005] Preferably, a heater for heating the inner core plate is installed in the pressing plate.

[0006] Preferably, the electric double conveying roller is composed of two electric conveying roller bodies, and both electric conveying roller bodies are integrated with a heating module for preheating the prepreg.

[0007] Preferably, the pulling assembly includes a horizontal rail, an electric slider, an electric lift and a movable suction cup; the horizontal rail is fixed between the two L-shaped limit rods; the electric slider is slidably connected to the horizontal rail; the electric lift is installed on the electric slider; and the movable suction cup is installed on the lifting component of the electric lift.

[0008] Preferably, a side plate is fixedly connected between the two front L-shaped limit rods; and a side plate is also fixedly connected between the two rear L-shaped limit rods.

[0009] Preferably, the side panels are made of insulation board material.

[0010] Preferably, a temperature sensor is installed on the side panel.

[0011] Preferably, an upper electric push rod is installed on the pressure plate; the telescopic end of the upper electric push rod is fixedly connected to a fixing frame; no less than two lifting suction cups are fixedly connected to the fixing frame; a through-hole structure corresponding to the number and position of the lifting suction cups is opened in the pressure plate.

[0012] Preferably, the lifting suction cup is coated with a thermal insulation material.

[0013] Preferably, a pressure sensor is installed at the upper end of the L-shaped limit rod.

[0014] Compared with the prior art, the present invention has the following advantages: a circuit board lamination process of the present invention is mainly based on a circuit board laminating machine to perform lamination processing on multiple layers of inner core boards and multiple layers of semi-cured sheets. The described circuit board laminating machine automatically pulls out the roll-shaped semi-cured sheets through a pulling component and stacks them alternately with the inner core boards between four L-shaped limit rods. In this process, the press drives the pressing plate and the cutter to press the inner core boards and semi-cured sheets stacked in sequence together, and at the same time the cutter cuts off the two sides of the semi-cured sheets, reducing the waste of semi-cured sheet materials and avoiding the offset of the inner core boards and the waste of cutting; overcoming the poor placement accuracy in the process of alternatingly stacking multiple layers of inner core boards and multiple layers of semi-cured sheets. Generally, after stacking, they are cut according to the standard size of the edge area to form standard size finished products. Such a processing method will cause a circle of semi-cured sheets and inner core board materials to be wasted around the finished product. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A perspective view illustrating a circuit board laminator according to the present invention; Figure 2 A three-dimensional diagram of a press plate of a circuit board laminator for describing the present invention; Figure 3 A perspective view of a motorized unwinding roller of a circuit board laminating machine according to the present invention is provided; Figure 4 A perspective view of a motorized dual conveyor roller for describing a circuit board laminator of the present invention; Figure 5 A perspective view of a pulling assembly of a circuit board laminator for describing the present invention; Figure 6 The present invention is a schematic diagram of a closed heat-insulating environment composed of a press plate, a cutter and side plates of a circuit board laminator.

[0016] Explanation of the accompanying drawings: 1-support table, 11-waste box, 2-press, 21-pressing plate, 2101-through hole structure, 22-cutter, 23-upper electric push rod, 24-fixed frame, 25-lifting suction cup, 31-electric unwinding roller, 32-semi-cured sheet, 33-electric double conveying roller, 41-L-shaped limiting rod, 410-groove structure, 42-connecting frame, 43-lower electric push rod, 44-pressure sensor, 51-cross rail, 52-electric slider, 53-electric lift, 54-movable suction cup, 61-side panel. DETAILED DESCRIPTION

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] Example 1 A circuit board lamination process, which uses a circuit board laminator to perform a lamination process on a multi-layer circuit board, a circuit board laminator, such as Figures 1-6As shown, it includes a support platform 1, a waste box 11, a press machine 2, a pressing plate 21, a cutter 22, an electric unwinding roller 31, a semi-cured sheet 32, an electric double conveying roller 33, an L-shaped limit rod 41, a connecting frame 42, a lower electric push rod 43 and a pulling assembly; the press machine 2 is installed on the support platform 1; a pressing plate 21 is provided on the lower pressing part of the press machine 2; a heater is installed in the pressing plate 21; a cutter 22 is fixed to the left and right sides of the pressing plate 21; an electric unwinding roller 31 is installed on the left side of the support platform 1; a roll-shaped semi-cured sheet 32 ​​is wound on the electric unwinding roller 31; an electric double conveying roller 33 for conveying the semi-cured sheet 32 ​​is installed on the support platform 1; the electric double conveying roller 33 It consists of two electric conveying roller bodies, and both electric conveying roller bodies are integrated with a heating module; four L-shaped limit rods 41 distributed in a matrix state are slidably connected to the support table 1; a connecting frame 42 is fixedly connected between the four L-shaped limit rods 41; a lower electric push rod 43 is installed at the bottom of the support table 1; the telescopic end of the lower electric push rod 43 is fixedly connected to the connecting frame 42; the four L-shaped limit rods 41 are provided with cutting groove structures 410 respectively aligned with the two cutters 22 above and below; a pulling component is commonly connected between the two L-shaped limit rods 41 on the front side; a pulling component is also commonly connected between the two L-shaped limit rods 41 on the rear side; a waste box 11 is placed on the right side of the support table 1.

[0019] like Figure 5 As shown, the pulling assembly includes a horizontal rail 51, an electric slider 52, an electric lift 53 and a movable suction cup 54; the horizontal rail 51 is fixedly connected between the two L-shaped limit rods 41; the electric slider 52 is slidably connected to the horizontal rail 51; the electric lift 53 is installed on the electric slider 52; the movable suction cup 54 is installed on the lifting component of the electric lift 53, and the movable suction cup 54 is externally connected to a vacuum suction machine.

[0020] like Figure 4 and Figure 5 As shown, a side plate 61 is fixedly connected between the two front L-shaped limit rods 41; a side plate 61 is also fixedly connected between the two rear L-shaped limit rods 41, and both side plates 61 are made of insulation board material; temperature sensors are installed on both side plates 61.

[0021] by Figure 1 The displayed shapes and markings are for reference only. The prepreg 32 is in the left direction relative to the electric double conveying roller 33 , and the movable suction cup 54 is in the front direction relative to the electric double conveying roller 33 .

[0022] The operator stands in front of the support platform 1 and pulls the free end of the roll-shaped semi-cured sheet 32 ​​on the electric unwinding roller 31 on the left side of the support platform 1 to the right, passes it between the two rollers of the electric double conveying roller 33, and moves it to the bottom of the mobile suction cup 54 and stops. After preparation, the operator starts the alternating stacking process of the multi-layer inner core board and the multi-layer semi-cured sheet 32 ​​on the support platform 1. First, the external robot places an inner core board on the support platform 1, and aligns the four corners of the rectangular inner core board with the concave right angles of the four L-shaped limit rods 41 "L", so that the inner core board is clamped between the four L-shaped limit rods 41. At this time, the four The upper surface of the L-shaped limit rod 41 is initially flush with the upper surface of the inner core plate, and then the electric lift 53 drives the movable suction cup 54 to move downward, so that the external vacuum suction machine can suck the free end of the semi-cured sheet 32 ​​passing through the electric double conveying rollers 33 through the movable suction cup 54. There are two movable suction cups 54 symmetrically installed, each sucking a corner of the free end of the semi-cured sheet 32, and then the electric slider 52 drives the movable suction cup 54 on the electric lift 53 to move to the right along the horizontal rail 51, so that the movable suction cup 54 pulls the free end of the semi-cured sheet 32 ​​it sucks to move to the right, and at the same time the electric unwinding roller 31 rotates to roll the semi-cured sheet wound around itself. The sheet 32 ​​is released, and the electric double conveying rollers 33 rotate synchronously to convey the released semi-cured sheet 32 ​​to the right. At the same time, the electric double conveying rollers 33 preheat the area where the semi-cured sheet 32 ​​passes, thereby increasing the temperature of the semi-cured sheet 32 ​​itself. In the subsequent hot pressing process of the semi-cured sheet 32, the waiting time for heating of a part of the semi-cured sheet 32 ​​can be appropriately reduced; until the outer end of the semi-cured sheet 32 ​​is pulled to the right to completely cover the upper surface of the inner core board, and at this time, the mobile suction cup 54 and the excess semi-cured sheet 32 ​​are located between the inner core board and the waste box 11, and then the lower electric push rod 43 pulls the connecting frame 42 to drive the four The L-shaped limit rod 41 rises upward, allowing the upper surfaces of the four L-shaped limit rods 41 to be exposed from the surface of the currently aligned inner core board, ready to receive the next inner core board. During this process, the four L-shaped limit rods 41 that rise upward will push the semi-cured sheet 32 ​​above it, so the electric double conveying rollers 33 need to rotate synchronously to continue to convey a small amount of semi-cured sheet 32 ​​to the right, so that the length of the semi-cured sheet 32 ​​that continues to be released can make up for the height difference caused by the L-shaped limit rod 41 pushing the semi-cured sheet 32 ​​upward, thereby ensuring that the area where the semi-cured sheet 32 ​​is located above the four L-shaped limit rods 41 remains stationary compared to the L-shaped limit rod 41.

[0023] Then the external robot aligns the next inner core panel between the four L-shaped limit rods 41, and places the inner core panel downward along the four L-shaped limit rods 41 above the area where the semi-cured sheet 32 ​​is pulled out, and the inner core panel presses the corresponding area of ​​the semi-cured sheet 32 ​​down on the inner core panel below it, so that the semi-cured sheet 32 ​​is clamped between the upper and lower inner core panels, and the two inner core panels are aligned up and down, and then the press 2 drives the pressing plate 21 and the cutter 22 to move downward, and the two cutters 22 respectively cut into the cutting groove structures 410 corresponding to the four L-shaped limit rods 41, and the two cutters 22 respectively cut the semi-cured sheet 32 ​​in the left and right areas of the two inner core panels, and the semi-cured sheet 32 ​​has the same width as the inner core panel. After the semi-cured sheet 32 ​​is clamped in the inner core panel, there is no need to align The front and back sides of the semi-cured sheets 32 and the inner core panels are cut. At this time, only the semi-cured sheets 32 located in the right area of ​​the two inner core panels are redundant, and the semi-cured sheets 32 located in the left area of ​​the two inner core panels can be pulled out and used later, and the semi-cured sheets 32 located between the two inner core panels just fill the gap between the two inner core panels, reducing the waste of semi-cured sheet 32 ​​material. Then the electric slider 52 continues to drive the movable suction cup 54 on the electric lift 53 to move to the right along the horizontal rail 51 until the movable suction cup 54 drives the cut excess semi-cured sheet 32 ​​to move to the right above the waste box 11, and then the external vacuum suction machine stops the suction work, allowing the excess semi-cured sheet 32 ​​to detach from the movable suction cup 54 and fall down into the waste box 11 for recycling.

[0024] During the above process, the horizontal rail 51, the electric slider 52, the electric lift 53 and the movable suction cup 54 will also rise accordingly, and the maximum rising distance will not exceed the movable range of the movable suction cup 54. The movable suction cup 54 can definitely play the role of sucking the free end of the semi-cured sheet 32.

[0025] After completing the alternating stacking process of the multi-layer inner core panel and the multi-layer semi-cured sheet 32 ​​on the support platform 1, the press 2 drives the pressing plate 21 to press down on the upper surface of the first inner core panel on the top layer, and then the press 2 increases the downward pressure of the pressing plate 21 on the inner core panel, and at the same time, the built-in heater of the pressing plate 21 continues to heat the inner core panel, so that the semi-cured sheet 32 ​​is in a semi-molten sticky state after being heated, and then the multi-layer inner core panel and the multi-layer semi-cured sheet 32 ​​are firmly hot-pressed together. The pressing plate 21 and the two cutters 22 cooperate with the two side plates 61 between the four L-shaped limit rods 41 to form a closed thermal insulation environment, which reduces the heat loss during the hot pressing process, and the temperature sensor built into the side plate 61 monitors the temperature in the closed thermal insulation environment to determine whether the temperature in the current closed thermal insulation environment reaches the preset temperature value, further improving the firm effect of hot pressing the multi-layer inner core panel and the multi-layer semi-cured sheet 32 ​​together.

[0026] Example 2 like Figure 1-Figure 5 As shown, on the basis of Example 1, two upper electric push rods 23 are installed on the pressure plate 21 of this embodiment; a fixing frame 24 is fixed between the telescopic ends of the two upper electric push rods 23; four lifting suction cups 25 are fixed on the fixing frame 24, and the lifting suction cups 25 are externally connected to a vacuum suction machine; a through-hole structure 2101 corresponding to the number and position of the lifting suction cups 25 is opened in the pressure plate 21; the outer wall of each lifting suction cup 25 is covered with a circle of thermal insulation material.

[0027] After placing the first inner core board and the semi-cured sheet 32 ​​and starting the automatic loading process, the external manipulator first places the second inner core board to be placed close to the lower surface of the pressing plate 21, and at the same time the upper electric push rod 23 pulls the fixing frame 24 to drive the four lifting suction cups 25 downward to be inserted into the corresponding through-hole structures 2101 in the pressing plate 21, and the external vacuum suction machine generates suction to the inner core board close to the lower surface of the pressing plate 21 through the lifting suction cups 25 to firmly suck it, and then the external manipulator releases the inner core board and leaves, and at the same time the pressing plate 21 uses the built-in heater to heat the inner core board. During the heating treatment, the lifting suction cup 25 is protected by the insulation material and is not affected by the temperature rise of the pressing plate 21. During the time when the inner core board is waiting to be placed, the inner core board is preheated and heated, and the temperature will not be directly increased to a level that affects the viscosity of the semi-cured sheet 32. Therefore, after all the inner core boards are placed, the inner core boards are all in a state higher than the normal ambient temperature. Therefore, when the final overlapping work is completed and the overall hot pressing molding is about to begin, the time for the temperature of the inner core board to rise to the hot pressing working temperature is reduced, and the idle time of the inner core board waiting to be placed is utilized to improve production efficiency.

[0028] Example 3 like Figure 1-Figure 5 As shown, on the basis of Example 1, a pressure sensor 44 is installed on the upper end of each of the four L-shaped limit rods 41 of this embodiment; in the process of the pressure plate 21 pressing downward on the upper end of the L-shaped limit rod 41, the pressure sensor 44 can monitor in real time the downward pressure exerted on the L-shaped limit rod 41 by the pressure plate 21. When the pressure sensor 44 detects that the downward pressure exerted on the L-shaped limit rod 41 by the pressure plate 21 exceeds the specified range value, the pressure sensor 44 feeds back the overload signal to the lower electric push rod 43 through the circuit system, and the lower electric push rod 43 drives the L-shaped limit rod 41 to move slightly downward, so that the L-shaped limit rod 41 can reduce the downward pressure exerted on it while keeping it against the pressure plate 21, thereby avoiding that the L-shaped limit rod 41 is subjected to a large downward pressure for a long time, which may cause damage to the connection between it and the lower electric push rod 43.

[0029] The above description is merely an example of the present invention and is not intended to limit the present invention. Any equivalent substitutions made within the principles of the present invention are intended to be included within the scope of protection of the present invention. Any content not elaborated in detail herein is already known to those skilled in the art.

Claims

1. A circuit board lamination process, which uses a circuit board laminator to perform lamination of multi-layer circuit boards, characterized in that: A circuit board laminating machine is described, comprising a support platform (1); a press (2) is mounted on the support platform (1); a pressing plate (21) is provided on the lower pressing part of the press (2); a cutter (22) is fixedly connected to the left and right sides of the pressing plate (21); an electric unwinding roller (31) is mounted on the support platform (1); a semi-cured sheet (32) in a roll shape is wound on the electric unwinding roller (31); an electric double conveying roller (33) for conveying the semi-cured sheet (32) is mounted on the support platform (1); four L-shaped limit rods (41) arranged in a matrix state are slidably connected to the support platform (1); four L-shaped limit rods (41) are fixedly ... A connecting frame (42) is fixedly connected between the limiting rods (41); a lower electric push rod (43) is installed on the support platform (1) to drive the connecting frame (42) to move in an up-down direction; the telescopic end of the lower electric push rod (43) is fixedly connected to the connecting frame (42); a cutting groove structure (410) aligned with the cutter (22) is provided on the L-shaped limiting rod (41); a pulling component for pulling out the semi-cured sheet (32) is connected between the two front L-shaped limiting rods (41); and a pulling component for pulling out the semi-cured sheet (32) is also connected between the two rear L-shaped limiting rods (41).

2. A circuit board lamination process according to claim 1, characterized in that: A heater for heating the inner core plate is installed in the pressing plate (21).

3. A circuit board lamination process according to claim 1, characterized in that: The electric double conveying roller (33) is composed of two electric conveying roller bodies, and both electric conveying roller bodies are integrated with a heating module for preheating the semi-cured sheet (32).

4. A circuit board lamination process according to claim 1, characterized in that: The pulling assembly includes a horizontal rail (51); the horizontal rail (51) is fixedly connected between two L-shaped limit rods (41); an electric slider (52) is slidably connected to the horizontal rail (51); an electric lift (53) is installed on the electric slider (52); and a movable suction cup (54) is installed on the lifting component of the electric lift (53).

5. A circuit board lamination process according to claim 1, characterized in that: A side plate (61) is fixedly connected between the two front L-shaped limit rods (41); and a side plate (61) is also fixedly connected between the two rear L-shaped limit rods (41).

6. A circuit board lamination process according to claim 5, characterized in that: The side panels (61) are made of insulation board material.

7. A circuit board lamination process according to claim 6, characterized in that: A temperature sensor is installed on the side plate (61).

8. A circuit board lamination process according to claim 1, characterized in that: An upper electric push rod (23) is mounted on the pressing plate (21); a telescopic end of the upper electric push rod (23) is fixedly connected to a fixing frame (24); no less than two lifting suction cups (25) are fixedly connected to the fixing frame (24); and a through-hole structure (2101) corresponding to the number and position of the lifting suction cups (25) is opened in the pressing plate (21).

9. A circuit board lamination process according to claim 8, characterized in that: The lifting sucker (25) is coated with a thermal insulation material.

10. A circuit board lamination process according to any one of claims 1 to 9, characterized in that: A pressure sensor (44) is mounted on the upper end of the L-shaped limiting rod (41).

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