A film material alternating stacking mechanism and a PCB pre-pressing device applying the mechanism

Abstract

The present invention relates to a PCB board film material conveying device, a film material alternating stacking mechanism and a PCB pre-pressing device applying the mechanism, comprising: a mounting frame and an object support, the object support is mounted on the top of the mounting frame for receiving stacked materials; a material conveying unit, which is arranged on the top of the object support to make the materials be translated from the outside and fall after being transported above the object support; a material supply unit, which is connected to the material conveying unit in a matching manner and is used for supplying materials to the material conveying unit. The present invention receives materials from the material supply unit through the material conveying unit, the materials fall from top to bottom, and effective stacking is achieved by stacking multiple layers of material conveying units or by matching a single material conveying unit with multiple material supply units and adjusting the falling order of different materials. This method can effectively improve the stacking speed of sheet materials, thereby improving the processing speed.

Description

Technical Field

[0001] The present invention relates to a conveying device for PCB board film materials, and more specifically, to a film material alternating stacking mechanism and a PCB pre-pressing device applying the mechanism. Background Art

[0002] The PCB board body is formed by laminating multiple different film materials, including various diaphragms and conductive circuit films with different functions. If the produced PCB board is a multi-layer circuit board, then the corresponding conductive circuit films need to be separated and stacked with more diaphragms. Currently, the stacking of film materials is completed manually. According to the specified stacking order, different film materials are manually selected and stacked and then sent to the pre-pressing equipment for preliminary pressing and fixing, so as to press multiple stacked film materials together. However, the process of this manual operation has low work efficiency and restricts the production and processing speed. Summary of the Invention

[0003] The present invention aims to solve the problem of low work efficiency of manually stacking film materials in the above-mentioned prior art. To this end, the present invention provides a film material alternating stacking mechanism and a PCB pre-pressing device applying the mechanism.

[0004] To achieve the above object, the present invention provides a film material alternating stacking mechanism, including: a mounting frame and an object support frame. The object support frame is installed on the top of the mounting frame for receiving stacked materials; a material conveying unit is arranged on the top of the object support frame to translate the material from the outside and drop it above the object support frame after transmission; the material conveying unit includes: a channel frame, which is connected and installed on the top of the object support frame; an entry notch is opened on the side wall of the channel frame; T-shaped support frames are symmetrically installed on the side walls on both sides of the channel frame and span across the entry notch; a first telescopic push rod is installed on the T-shaped support frame; a clamping conveyor belt is slidably arranged in the entry notch; after the clamping conveyor belt clamps and conveys the material above the object support frame, the first telescopic push rod is driven to move the clamping conveyor belts on both sides away from each other, so that the material falls from the channel frame into the object support frame; a material supply unit is connected to the material conveying unit in a matching manner for supplying materials to the material conveying unit; the material conveying unit and the material supply unit form two usage states. One is that the material conveying unit and the material supply unit are connected as a group, and multiple layers are stacked upward in sequence with the channel frame as the main support body. The multiple channel frames are rotatably connected by rotary joints, and the rotary joints are fixedly connected by vertical support columns; the other is that the object support frame and the channel frame are rotatably connected by the rotary joints. An external gear ring is provided on the channel frame, and the external gear ring is driven to rotate by a driving gear. An annular support plate is arranged around the mounting frame with the rotary joint as the center point. A plurality of the material supply units are arranged on the annular support plate, and the center lines of the plurality of material supply units converge at the center point of the rotary joint. The clamping conveyor belt is aligned with the material supply units at different positions as the channel frame rotates.

[0005] As a further improvement of the solution, the material supply unit includes: a loading frame arranged in front of the clamping conveyor belt; a lifting chute is opened on the side wall of the loading frame; a support plate is slidably arranged in the loading frame through the lifting chute; a lifting driving device is arranged on the loading frame for driving the support plate to move up and down; a material taking hand is arranged at the edge of the loading frame for feeding the material in the frame onto the clamping conveyor belt.

[0006] As a further improvement of the solution, the lifting driving device includes: a lead screw rotatably arranged in the lifting chute, and the lead screw is connected to the support plate; a double-shaft motor is arranged on the side wall of the loading frame; a transmission shaft, one end of which is connected to the double-shaft motor, and the other end transmits power to the lead screw through a bevel gear set to drive the lead screw to rotate.

[0007] As a further improvement of the scheme, the material grabber includes: a lifting chute, which is opened on the side walls on both sides of the edge of the loading frame; a second telescopic push rod, which is installed on the side walls on both sides of the loading frame; a connecting frame, which is installed on the movable rod of the second telescopic push rod; a connecting plate, which is slidably connected to the connecting frame through the edge protrusions at both ends; a vacuum adsorption plate, which is connected to the bottom of the connecting plate; and a protruding slide rod, which is arranged at the end of the edge protrusion and placed in the lifting chute.

[0008] As a further improvement of the scheme, the rotary joint includes: a fixed plate and a rotating plate of the same size and fitting together, the fixed plate and the rotating plate are respectively connected to respective parts that rotate with each other; an annular groove is opened on the fixed plate and the rotating plate; a ball is placed in the annular groove; and an anti-disconnection hook is fixed to the inner ring of the fixed plate and hooks the rotating plate.

[0009] As a further improvement of the scheme, it also includes: a thin plate, which is arranged on the edge side wall of the support rack, and a notch is opened in the area of ​​the bottom of the support rack that matches the thin plate; a vibrator, which is arranged on the thin plate, and the thin plate vibrates as the vibrator works.

[0010] As a further improvement of the solution, it also includes: a pressure relief port is opened on the side walls around the channel frame; and a weight reduction port is opened on both the loading frame and the support plate.

[0011] As a further improvement of the scheme, it also includes: an installation opening, which is opened on the side walls around the channel frame; a connecting rod, which is rotatably arranged in the installation opening; and a blocking tooth, which is fixedly installed on the connecting rod and maintained in a protruding state in the installation opening by a torsion spring.

[0012] As a further improvement of the solution, it also includes: four positioning holes are evenly opened on the fixed disk; and an insertion rod is inserted into the rotating disk and can be selectively inserted into any one of the multiple positioning holes.

[0013] A PCB pre-pressing device using the above-mentioned film material alternating stacking mechanism comprises: the mounting frame is fixedly mounted on the feed channel of the PCB pre-pressing device through the connecting holes thereon, the bottom of the support frame is provided with a push-out channel for installing a push device, and the stacked materials in the support frame are pushed onto the feed channel by the push device.

[0014] The present invention brings the following effects:

[0015] 1. The present invention receives materials from the material supply unit through the material conveying unit, and the materials fall downward from the top. Effective stacking is achieved by stacking multiple layers of material conveying units or matching multiple material supply units with a single material conveying unit, and adjusting the falling order of different materials. This method can effectively increase the stacking speed of sheet materials, thereby increasing the processing speed.

[0016] 2. The material picking arm of the present invention has a simple structure, and the vacuum adsorption plate can continuously clamp the material into the clamping conveyor belt through reciprocating translation to complete the feeding, which simplifies the material picking action and is stable and reliable when used.

[0017] 3. The thin plate and vibrator provided in the present invention can gather the materials stacked on the support rack neatly by means of vibration, thereby preventing the materials from getting stuck on the support rack and tilting up.

[0018] 4. The pressure relief port provided in the present invention can allow the air below the material to be discharged through the pressure relief port when the material falls, thereby preventing the material from being severely tilted or turned over when falling.

[0019] 5. The blocking teeth provided in the present invention can keep the material in a straight state when falling, and buffer the falling speed at the same time; the positioning holes and insertion rods provided can selectively fix and limit the rotating joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a complete schematic diagram of the present invention.

[0021] Figure 2 It is a schematic diagram of the mounting frame, the supporting frame and the vibrator of the present invention.

[0022] Figure 3 It is a schematic diagram of the material conveying unit of the present invention.

[0023] Figure 4 It is a schematic diagram of the material supply unit and the material taking arm of the present invention.

[0024] Figure 5 It is a schematic diagram of the first combination form of the present invention.

[0025] Figure 6 It is a schematic diagram of a rotary joint of the present invention.

[0026] Figure 7 It is a schematic diagram of the second combination form of the present invention.

[0027] Figure 8 It is a top view of the second combination form of the present invention.

[0028] The corresponding relationship between the reference numerals and the names of the components in the accompanying drawings is as follows:

[0029] 100 - Mounting frame, 101 - Connecting hole, 102 - Object support, 103 - Pushing channel, 104 - Thin plate, 105 - Vibrator;

[0030] 200 - Channel frame, 201 - Entrance notch, 202 - T-shaped support frame, 203 - First telescopic push rod, 204 - Clamping conveyor belt, 205 - Pressure relief port, 206 - Mounting port, 207 - Connecting rod, 208 - Blocking teeth;

[0031] 300 - Loading frame, 301 - Weight reduction port, 302 - Lifting chute, 303 - Lead screw, 304 - Support plate, 305 - Biaxial motor, 306 - Transmission shaft, 307 - Bevel gear set;

[0032] 400 - Lifting chute, 401 - Second telescopic push rod, 402 - Connecting frame, 403 - Connecting plate, 404 - Vacuum adsorption plate, 405 - Edge protrusion, 406 - Protruding slide bar;

[0033] 500 - Fixed disk, 501 - Rotating disk, 502 - Annular groove, 503 - Ball, 504 - Anti-disengagement hook, 506 - Positioning hole, 507 - Insert rod, 508 - Support column;

[0034] 600 - External gear ring, 601 - Driving gear, 602 - Annular support plate. Detailed implementation manners

[0035] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. It can be understood that the specific embodiments described herein are only used to explain the present application, rather than limiting the present application. Additionally, it should be noted that for the sake of description, only parts related to the present application rather than all structures are shown in the accompanying drawings. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application.

[0036] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "mount", "connect", and "couple" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a connection that can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0037] The present invention specifically provides a film material alternating stacking mechanism for a PCB pre-pressing device to achieve rapid and continuous stacking of different film materials. The PCB pre-pressing device is a commonly used device, mainly including a feeding channel part for transporting the stacked film materials to the pressing area and a part for pressing the stacked film materials. Therefore, the PCB pre-pressing device will not be repeated in this embodiment. The film material alternating stacking mechanism is as Figures 1 - 8 shown, and includes: a mounting frame 100 and an object support 102. Four protruding connecting ears are provided at the bottom of the mounting frame 100, and connecting holes 101 are provided on the connecting ears. The object support 102 is fixedly installed on the top of the mounting frame 100. The film materials to be pre-pressed will finally fall and be stacked in the object support 102, and a pushing channel 103 is opened at the bottom of the object support 102. During use, the mounting frame 100 is fixedly installed on the feeding channel opening of the PCB pre-pressing device through the connecting holes 101. In order to push the stacked film materials on the object support 102 onto the feeding channel of the PCB pre-pressing device, a pushing device also needs to be installed in the pushing channel 103. The pushing device is a common screw drive mechanism (not shown in the figure). The stacked film materials are pushed out of the object support 102 through the pushing device, and then the film materials are pushed onto the feeding channel. After the stacked film materials fall on the feeding channel, they can be transported to the pressing area of the PCB pre-pressing device for pre-pressing operations.

[0038] A material conveying unit is installed on the top of the object support 102. The material conveying unit is used to translate and convey the material from the outside to above the object support 102 and then release it to fall. By controlling the falling order of the film materials, the stacking of the film materials is completed, and the falling film materials are finally located in the object support 102. According to Figure 2 shown, a thin plate 104 is provided on the edge side wall of the object support 102. The thin plate 104 is a spring plate that can bend and reset. A notch allowing the thin plate 104 to swing is opened in the area of the bottom of the object support 102 near the thin plate 104, and a vibrator 105 is fixedly installed on the thin plate 104. The film materials falling on the object support 102 are attached to the side wall of the object support 102. If the edge of the film material abuts against the side wall, at this time, through the operation of the vibrator 105, the thin plate 104 is vibrated and the vibration is transmitted to the film material, so that the film material abutting against the side wall can be neatly laid flat to avoid the situation of the edge of the film material tilting and warping.

[0039] According to Figure 3As shown in the figure, the material conveying unit includes: a channel frame 200 connected and installed on the top of the object support 102. An access notch 201 is formed on the side wall of the channel frame 200. A T-shaped support frame 202 is fixedly installed on the side wall of the channel frame 200 across the access notch 201. The T-shaped support frames 202 are symmetrically installed on the side walls on both sides of the channel frame 200. A first telescopic push rod 203 is fixedly installed on the T-shaped support frame 202. A clamping conveyor belt 204 is fixedly installed on the movable rod of the first telescopic push rod 203. The clamping conveyor belt 204 is formed by superimposing two conveyor belts. The film material is conveyed in the gap between the two conveyor belts. Through the lifting of the first telescopic push rod 203, the clamping conveyor belt 204 is slidably arranged in the access notch 201. After the clamping conveyor belt 204 clamps and conveys the film material into the channel frame 200, the film material is just above the object support 102. At this time, by driving the first telescopic push rod 203 to make the clamping conveyor belts 204 on both sides move away from each other, the film material can be separated from the clamping conveyor belt 204, and then the film material falls from the channel frame 200 into the object support 102. A material supply unit is also connected to the material conveying unit in a matching manner. The material supply unit is used to supply the required film material to the clamping conveyor belt 204 of the material conveying unit.

[0040] Among them, in accordance with Figure 3 As shown in the figure, pressure relief ports 205 are formed on the side walls around the channel frame 200. During the process of the film material falling downward from the inside of the channel frame 200, the air inside the frame will be discharged outward through the pressure relief ports 205 during the downward fall of the film material, so as to prevent the film material from being interfered by the air inside the frame during the falling process and causing a serious tilt or turnover of the falling posture.

[0041] In accordance with Figure 1 、 Figure 3 and Figure 4As shown in the figure, the material supply unit includes: a loading frame 300 provided in front of the clamping conveyor belt 204. Lifting chutes 302 are formed on the side walls around the loading frame 300. A pallet 304 is slidably arranged in the loading frame 300 through the lifting chutes 302. The film materials to be stacked are placed on the pallet 304. A lifting drive device is provided on the loading frame 300 for driving the pallet 304 to move up and down. The lifting drive device includes: a lead screw 303 rotatably arranged in the lifting chute 302. The lead screw 303 is connected to the pallet 304. Therefore, as the lead screw 303 rotates, the pallet 304 can move up and down in the lifting chute 302. A dual-shaft motor 305 is fixedly installed on the outer side wall of the loading frame 300. Transmission shafts 306 are connected to the output shafts at both ends of the dual-shaft motor 305. The power at the end of the transmission shaft 306 is transmitted to the lead screw 303 through a bevel gear set 307 to drive the lead screw 303 to rotate, thereby realizing the up and down lifting of the pallet 304. After the film materials on the pallet 304 rise with the pallet 304, the material taking hand provided at the edge of the loading frame 300 will suck up the film materials and then insert one end of the film materials into the gap of the clamping conveyor belt 204 by means of horizontal pushing, so that the clamping conveyor belt 204 conveys the film materials into the channel frame 200.

[0042] According to Figure 1 、 Figure 3 and Figure 4 As shown in the figure, the material taking hand includes: lifting chutes 400 formed on the side walls on both sides of the edge of the loading frame 300. The lifting chutes 400 are inclined. A second telescopic push rod 401 is fixedly installed on the side wall of the loading frame 300 close to the lifting chutes 400. A connecting frame 402 is fixedly connected to the movable rod of the second telescopic push rod 401. The connecting frame 402 realizes translation through the drive of the second telescopic push rod 401. A connecting plate 403 is slidably arranged on the two connecting frames 402. Edge protrusions 405 are provided at the edges on both sides of the connecting plate 403. The connecting plate 403 is slidably connected to the connecting frame 402 through the edge protrusions 405. The connecting plate 403 can slide up and down in the connecting frame 402. A vacuum suction plate 404 is provided at the bottom of the connecting plate 403. A protruding slide rod 406 is provided at the end of the edge protrusion 405, and the protruding slide rod 406 is placed in the lifting chute 400.

[0043] During use, the film material is lifted upward by the support plate 304. After being lifted to a certain height, it comes into contact with the vacuum adsorption plate 404. First, the film material is adsorbed by the vacuum adsorption plate 404, and then the connecting frame 402 is pushed to translate by the second telescopic push rod 401. During the movement, the protruding slide rod 406 moves obliquely upward in the lifting chute 400. Thus, the connecting plate 403 is guided by the protruding slide rod 406 to slide upward in the connecting frame 402. While the vacuum adsorption plate 404 moves obliquely upward, it drives the adsorbed film material to move upward accordingly. Finally, it translates to the front of the clamping conveyor belt 204 and inserts the film material into the gap of the clamping conveyor belt 204. Subsequently, the vacuum adsorption plate 404 releases the film material, and thus the feeding operation of the film material is completed. The structure of this material taking hand is simple. When grasping the film material, only the second telescopic push rod 401 needs to reciprocally push the connecting frame 402 to translate, and the connecting plate 403 on the connecting frame 402 moves up and down under the guidance of the lifting chute 400. In this way, the adsorbed film material is inserted into the gap of the clamping conveyor belt 204 through the vacuum adsorption plate 404. The mechanical action is simple, the driving stroke is short, and it is not easy to have failures.

[0044] The material conveying unit and the material providing unit are combined to form two usage states. According to Figure 5 As shown, the first usage state is: the material conveying unit and the material providing unit are matched and connected as a group, and are stacked in multiple layers upward in sequence with the channel frame 200 as the supporting main body. In this embodiment, three layers are taken as an example. The material conveying unit and the material providing unit are stacked upward in three layers in sequence through the channel frame 200. The three channel frames 200 are rotationally connected through rotary joints, forming the structural state as shown in Figure 5 As shown, the rotary joints are reinforced and connected through vertical support columns 508. During use, different film materials are stored on the material providing units of different layers. As the falling order of the film materials is different, the film materials will be stacked in the object support 102 in the expected order. According to Figure 4 As shown, weight reduction openings 301 are formed around the side wall of the loading frame 300, and the surface of the support plate 304 is also provided with weight reduction openings 301. The weight reduction openings 301 realize the lightweight design structure of the loading frame 300 and the support plate 304, avoiding the inclination of the channel frame 200 caused by the excessive overall weight of the material providing unit in the first usage state.

[0045] According to Figure 7 and Figure 8As shown, the second usage state is: a rotary joint is rotatably connected between the object carrier 102 and the channel frame 200, that is, the material conveying unit is rotatably arranged on the object carrier 102. An external gear ring 600 is provided on the channel frame 200 of the rotating part. The external gear ring 600 meshes with the driving gear 601, and an external driving device makes the driving gear 601 rotate, thereby making the material conveying unit rotate. A ring-shaped support plate 602 is arranged around the mounting frame 100 with the rotary joint as the center point. A plurality of material supply units are arranged on the ring-shaped support plate 602, and the material conveying unit and the material supply unit are separated. In this embodiment, three material supply units are taken as an example. The center lines of the three material supply units converge at the center point of the rotary joint together, forming a structural state as shown in Figure 8 As shown. Different film materials are placed on different material supply units, and by driving the channel frame 200 to rotate, the clamping conveyor belt 204 arranged thereon is matched and aligned with the material supply units at different positions, and then the film material is conveyed into the channel frame 200. Subsequently, after the channel frame 200 and the object carrier 102 are rotated and aligned, the film material in the channel frame 200 is released, and the film material can be dropped into the object carrier 102.

[0046] According to Figure 5 and Figure 6 As shown, the rotary joint includes: a fixed disk 500 and a rotating disk 501 that are identical in size and fit together. The fixed disk 500 and the rotating disk 501 are respectively connected to the components that rotate relative to each other. According to Figure 5 As shown, in the first usage state, the fixed disk 500 and the rotating disk 501 are respectively connected to two adjacent channel frames 200 up and down. According to Figure 7 As shown, in the second usage state, the fixed disk 500 is installed on the object carrier 102, the rotating disk 501 is installed on the channel frame 200 above the object carrier 102, and the external gear ring 600 is fixedly installed on the rotating disk 501 to drive the channel frame 200 to rotate. Annular grooves 502 are provided on both the fixed disk 500 and the rotating disk 501, and a plurality of balls 503 are arranged in the annular grooves 502 to make the rotation of the fixed disk 500 and the rotating disk 501 smoother. An anti-disengagement hook 504 is fixedly installed on the inner ring of the fixed disk 500, and the anti-disengagement hook 504 hooks the rotating disk 501 to prevent the rotating disk 501 from falling off.

[0047] In the state where the channel frames 200 are vertically stacked, the connection through the rotary joint can make the material supply units more compact, occupy less space, and only need to move the material supply unit to replenish the film material into the loading frame 300 when supplying the film material. Therefore, the first usage state is suitable for building in an environment with a small working space. At the same time, in order to prevent the channel frame 200 from skewing due to the center of gravity offset of the material supply unit in the first usage state, the position of the material supply unit on the channel frame 200 can be rotated and adjusted through the rotary joint to balance the side load, specifically as shown inFigure 5 As shown, if all the material supply units are on the right side in the first use state, the channel frame 200 will tilt to the right due to the weight of the material supply units. Therefore, by using a rotating joint to stagger the left and right of the material supply units, the left and right counterweights can be effectively balanced. At the same time, the distance between the upper and lower material supply units will be larger, making it easier to replenish the film material.

[0048] In the second use state, a single material conveying unit matches multiple material supply units, and they are all arranged at the same plane height. The required plane area is more than that in the first use state, but the height is not as high as that in the first use state. Therefore, when in use, different use states can be set up according to the working environment.

[0049] According to Figure 6 As shown, four positioning holes 506 are evenly opened on the fixed disk 500, and a plug rod 507 is slidably inserted through the rotating disk 501. The plug rod 507 can match different positioning holes 506 on the fixed disk 500 as the rotating disk 501 rotates, so as to keep the channel frame 200 from rotating automatically after rotating to a fixed position.

[0050] According to Figure 5 and Figure 7 As shown, in the first use state, as the stacking layer number of the channel frame 200 increases, the risk of the falling posture of the film material deflecting and tilting during the falling process of the uppermost film material becomes greater. In the second use state, since the channel frames 200 are not stacked, the height during the falling of the film material is not sufficient to cause the film material to deflect. For the problem of the film material falling and flipping in the first use state, according to Figure 3 As shown, mounting openings 206 are opened on the side walls around the channel frame 200. Connecting rods 207 are rotatably arranged in the mounting openings 206. Blocking teeth 208 are provided on the connecting rods 207. The connecting rods 207 and the mounting openings 206 keep the blocking teeth 208 in a laterally protruding state through torsion springs. When the film material falls, the edge of the film material will contact and press down the blocking teeth 208. This process of the film material contacting the blocking teeth 208 can buffer the falling film material and prevent the film material from deflecting and tilting.

[0051] The above-described embodiments only represent the preferred embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations, improvements, and substitutions can be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

1. A film material alternating stacking mechanism, comprising: A mounting frame (100) and a supporting frame (102), wherein the supporting frame (102) is mounted on the top of the mounting frame (100) and is used to receive stacked materials; a material conveying unit is arranged on the top of the supporting frame (102) to allow materials to be transferred horizontally from the outside to the top of the supporting frame (102) and then fall; characterized in that: The material conveying unit comprises: a channel frame (200) connected and installed on the top of the supporting rack (102); an entry notch (201) provided on the side wall of the channel frame (200); a T-shaped support frame (202) symmetrically installed on the side walls of both sides of the channel frame (200) and arranged across the entry notch (201); a first telescopic push rod (203) installed on the T-shaped support frame (202); a clamping conveyor belt (204) slidably arranged in the entry notch (201); after the clamping conveyor belt (204) clamps and conveys the material to the top of the supporting rack (102), the first telescopic push rod (203) drives the clamping conveyor belts (204) on both sides to move away from each other, so that the material falls from the channel frame (200) into the supporting rack (102); a material supply unit matched and connected with the material conveying unit and used to supply the material to the material conveying unit; The material conveying unit and the material supply unit are combined to form two use states, one of which is that the material conveying unit and the material supply unit are connected as a group, and multiple layers are stacked upward in sequence with the channel frame (200) as the supporting body, and multiple channel frames (200) are rotatably connected through rotating joints, and the rotating joints are reinforced by vertical support columns (508); the second is that the support frame (102) and the channel frame (200) are rotatably connected through the rotating joint, and the channel frame (200) is provided with an outer gear ring (600), and the outer gear ring (600) is driven to rotate by a driving gear (601), and an annular support plate (602) is arranged around the mounting frame (100) with the rotating joint as the center point, and multiple material supply units are arranged on the annular support plate (602), and the center lines of the multiple material supply units converge at the center point of the rotating joint. The clamping conveyor belt (204) is aligned with the material supply units at different positions as the channel frame (200) rotates; The material supply unit comprises: a loading frame (300) arranged in front of the clamping conveyor belt (204); a lifting chute (302) provided on the side wall of the loading frame (300); a support plate (304) slidably arranged in the loading frame (300) through the lifting chute (302); a lifting drive device arranged on the loading frame (300) for driving the support plate (304) to move up and down; a material picker arranged on the edge of the loading frame (300) for feeding the material in the frame onto the clamping conveyor belt (204); The lifting drive device comprises: a screw rod (303) rotatably arranged in the lifting slide groove (302), the screw rod (303) being connected to the support plate (304); a double-axis motor (305) arranged on the side wall of the loading frame (300); a transmission shaft (306), one end of which is connected to the double-axis motor (305), and the other end of which transmits power to the screw rod (303) through a bevel gear set (307) to drive the screw rod (303) to rotate; The rotary joint comprises: a fixed disk (500) and a rotating disk (501) of the same size and fitted to each other, the fixed disk (500) and the rotating disk (501) being respectively connected to respective components that rotate with each other; an annular groove (502) provided on the fixed disk (500) and the rotating disk (501); a ball (503) disposed in the annular groove (502); and an anti-disconnection hook (504) fixedly arranged on the inner ring of the fixed disk (500) and hooking the rotating disk (501).

2. The film material alternating stacking mechanism according to claim 1, characterized in that: The material picker includes: a lifting chute (400), which is opened on the side walls on both sides of the edge of the loading frame (300); a second telescopic push rod (401), which is installed on the side walls on both sides of the loading frame (300); a connecting frame (402), which is installed on the movable rod of the second telescopic push rod (401); a connecting plate (403), which is slidably connected to the connecting frame (402) through the edge protrusions (405) at both ends; a vacuum adsorption plate (404), which is connected to the bottom of the connecting plate (403); and a protruding slide rod (406), which is arranged at the end of the edge protrusion (405) and placed in the lifting chute (400).

3. The film material alternating stacking mechanism according to claim 2, characterized in that: Also includes: A thin plate (104) is arranged on the edge side wall of the support frame (102), and a notch is provided in the area at the bottom of the support frame (102) matching the thin plate (104); a vibrator (105) is arranged on the thin plate (104), and the thin plate (104) vibrates as the vibrator (105) works.

4. The film material alternating stacking mechanism according to claim 3 is characterized in that: Also includes: The pressure relief port (205) is provided on the side walls around the channel frame (200); and the weight reduction port (301) is provided on both the loading frame (300) and the support plate (304).

5. The film material alternating stacking mechanism according to claim 4, characterized in that: Also includes: An installation opening (206) is provided on the side walls around the channel frame (200); a connecting rod (207) is rotatably disposed in the installation opening (206); The blocking tooth (208) is fixedly mounted on the connecting rod (207) and is maintained in a protruding state in the mounting opening (206) by a torsion spring.

6. The film material alternating stacking mechanism according to claim 5, characterized in that: Also includes: Four positioning holes (506) are evenly arranged on the fixed disk (500); and an insertion rod (507) is inserted through the rotating disk (501) and can be selectively inserted into any one of the plurality of positioning holes (506).

7. A PCB pre-pressing device using the film material alternating stacking mechanism according to any one of claims 1 to 6, characterized in that: include: The mounting frame (100) is fixedly mounted on the feed channel of the PCB pre-pressing device via the connection holes (101) thereon, and a push-out channel (103) is provided at the bottom of the support frame (102) for installing a push device, and the stacked materials in the support frame (102) are pushed onto the feed channel via the push device.

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