Membrane material alternate stacking mechanism and PCB pre-pressing device applying same

Abstract

The invention relates to a PCB (printed circuit board) film material conveying device, in particular to a film material alternate stacking mechanism and a PCB pre-pressing device applying the same, which comprises a mounting frame and a supporting frame, and the supporting frame is mounted at the top of the mounting frame and is used for bearing stacked materials; the material conveying unit is arranged at the top of the object supporting frame, and materials are translated and conveyed to the position above the object supporting frame from the outside and then fall off; and the material supply unit is connected with the material conveying unit in a matched mode and used for supplying materials to the material conveying unit. The materials from the material supply units are received through the material conveying units, the materials fall down from the top, and effective stacking is achieved by stacking multiple layers of material conveying units or matching a single material conveying unit with multiple material supply units and adjusting the falling sequence of different materials. In this way, the stacking speed of the sheet-shaped materials can be effectively increased, and therefore the machining speed is increased.

Description

Technical Field

[0001] The invention relates to a PCB board film material conveying device, in particular to a film material alternate stacking mechanism and a PCB pre-pressing device using the mechanism. Background Art

[0002] The PCB board body is formed by laminating multiple layers of different film materials, including various diaphragms and conductive circuit films with different functions. If the PCB board produced is a multi-layer circuit board, the corresponding conductive circuit film needs to be separated and stacked with more diaphragms. The stacking of film materials is currently done 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 manual operation process has low work efficiency, which restricts the speed of production and processing. Summary of the invention

[0003] The present invention aims to solve the problem of low working 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 using the mechanism.

[0004] To achieve the above-mentioned purpose, the present invention provides such a film material alternating stacking mechanism, comprising: a mounting frame and a supporting frame, wherein the supporting frame is mounted on the top of the mounting frame for receiving the stacked materials; a material conveying unit is arranged on the top of the supporting frame, so that the materials are translated from the outside to the top of the supporting frame and then fall; the material conveying unit comprises: a channel frame, which is connected and mounted on the top of the supporting frame; an entry notch, which is opened on the side wall of the channel frame; a T-shaped support frame, which is symmetrically mounted on the side walls on both sides of the channel frame and is arranged across the entry notch; a first telescopic push rod is mounted on the T-shaped support frame; a clamping conveyor belt, which is slidably arranged in the entry notch; after the clamping conveyor belt clamps and conveys the materials to the top of the supporting frame, the first telescopic push rod is driven to make the clamping conveyor belts on both sides move away from each other, so that the materials fall from the channel frame to the supporting frame; the material providing unit, together with the material conveying unit The material conveying unit and the material supply unit are matched and connected to each other, and are used to supply materials to the material conveying unit; the material conveying unit and the material supply unit are combined to form two usage states, one of which is: 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 supporting body, and multiple channel frames are rotatably connected by rotating joints, and the rotating joints are reinforced by vertical support columns; the second is: the support rack and the channel frame are rotatably connected by the rotating joint, and the channel frame is provided with an outer gear ring, and the outer gear ring is driven to rotate by the engagement of the driving gear, and an annular support plate is arranged around the mounting frame with the rotating joint as the center point, and multiple material supply units are arranged on the annular support plate, and the center lines of multiple material supply units converge at the center point of the rotating joint, and 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 scheme, the material providing unit includes: a loading frame, which is arranged in front of the clamping conveyor belt; a lifting chute, which is opened on the side wall of the loading frame; a pallet, which is slidably arranged in the loading frame through the lifting chute; a lifting drive device, which is arranged on the loading frame and is used to drive the pallet to move up and down; and a material picking arm, which is arranged at the edge of the loading frame and is used to deliver the material in the frame to the clamping conveyor belt.

[0006] As a further improvement of the scheme, the lifting drive device includes: a screw rod, which is rotatably arranged in the lifting slide groove and is connected to the support plate; a dual-axis motor, which is arranged on the side wall of the loading frame; a transmission shaft, one end of which is connected to the dual-axis motor, and the other end transmits power to the screw rod through a bevel gear set to drive the screw rod 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: 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.

[0015] 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.

[0016] 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.

[0017] 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.

[0018] 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

[0019] Figure 1 It is a complete schematic diagram of the present invention.

[0020] Figure 2 It is a schematic diagram of the mounting frame, the supporting frame and the vibrator of the present invention.

[0021] Figure 3 It is a schematic diagram of the material conveying unit of the present invention.

[0022] Figure 4 It is a schematic diagram of the material supply unit and the material taking arm of the present invention.

[0023] Figure 5 It is a schematic diagram of the first combination form of the present invention.

[0024] Figure 6 It is a schematic diagram of a rotary joint of the present invention.

[0025] Figure 7 It is a schematic diagram of the second combination form of the present invention.

[0026] Figure 8 It is a top view of the second combination form of the present invention.

[0027] The corresponding relationship between the reference numerals and the names of the components in the accompanying drawings is as follows: 100-mounting frame, 101-connecting hole, 102-supporting frame, 103-pushing channel, 104-thin plate, 105-vibrator; 200-channel frame, 201-entry notch, 202-T-shaped support frame, 203-first telescopic push rod, 204-clamping conveyor belt, 205-pressure release port, 206-installation port, 207-connecting rod, 208-blocking tooth; 300-loading frame, 301-weight reduction port, 302-lifting slide, 303-screw, 304-support plate, 305-dual-axis motor, 306-transmission shaft, 307-bevel gear set; 400-lifting slide, 401-second telescopic push rod, 402-connecting frame, 403-connecting plate, 404-vacuum adsorption plate, 405-edge protrusion, 406-protruding slide rod; 500-fixed plate, 501-rotating plate, 502-annular groove, 503-ball, 504-anti-unhooking, 506-positioning hole, 507-insertion rod, 508-support column; 600-outer gear ring, 601-driving gear, 602-annular support plate. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It will be appreciated that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some but not all structures related to the present application are shown in the drawings. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the art without making creative work are within the scope of protection of the present application.

[0029] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] The present invention specifically provides a film material alternating stacking mechanism for a PCB pre-pressing device to realize fast and continuous stacking of different film materials. The PCB pre-pressing device is a conventional device, which mainly includes a feed channel part for transmitting the stacked film material to the pressing area and a part for pressing the stacked film material. Therefore, the PCB pre-pressing device is not repeated in this embodiment. The film material alternating stacking mechanism is as follows. Figure 1-Figure 8 As shown, it includes: a mounting frame 100 and a support frame 102. Four protruding connection ears are provided at the bottom of the mounting frame 100, and the connection ears are provided with connection holes 101. The support frame 102 is fixedly installed on the top of the mounting frame 100. The film material to be pre-pressed will finally fall into the support frame 102 and be stacked. A push-out channel 103 is opened at the bottom of the support frame 102. When in use, the mounting frame 100 is fixedly installed on the feed channel opening of the PCB pre-pressing device through the connection holes 101. In order to push the stacked film material on the support frame 102 to the feed channel of the PCB pre-pressing device, a push-out device needs to be installed in the push-out channel 103. The push-out device is a common spiral transmission mechanism (not shown in the figure). The stacked film material is pushed out from the support frame 102 by the push-out device, and then pushed onto the feed channel. After the stacked film material falls on the feed channel, it can be transferred to the press area of ​​the PCB pre-pressing device for pre-pressing operation.

[0031] A material conveying unit is installed on the top of the support rack 102. The material conveying unit is used to transfer the material from the outside to the top of the support rack 102 and then release it to fall. By controlling the falling order of the film materials, the film materials are stacked, and the fallen film materials are finally placed in the support rack 102. Figure 2 As shown, a thin plate 104 is provided on the edge side wall of the support rack 102. The thin plate 104 is a spring plate that can bend and reset. A notch is provided in the area near the thin plate 104 at the bottom of the support rack 102 to allow the thin plate 104 to swing, and a vibrator 105 is fixedly installed on the thin plate 104. The film material falling on the support rack 102 adheres to the side wall of the support rack 102. If the edge of the film material abuts against the side wall, the vibrator 105 works to make the thin plate 104 vibrate and then transmit the vibration to the film material, so that the film material abutting against the side wall can be neatly laid flat to avoid the situation where the edge of the film material is tilted and warped.

[0032] according to Figure 3As shown, the material conveying unit includes: a channel frame 200 connected and installed on the top of the supporting rack 102, an entry notch 201 is opened 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 entry notch 201, the T-shaped support frame 202 is symmetrically installed on the side walls of the channel frame 200 on both sides, 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 two conveyor belts superimposed on each other, the film material is placed in the gap between the two conveyor belts for transmission, and the clamping conveyor belt 204 is slid into the entry notch 201 through the support of the first telescopic push rod 203. After the clamping conveyor belt 204 clamps the film material into the channel frame 200, the film material is just above the support rack 102. At this time, the first telescopic push rod 203 drives the clamping conveyor belts 204 on both sides to move away from each other, so that the film material can be separated from the clamping conveyor belt 204, and then the film material falls from the channel frame 200 to the support rack 102. The material conveying unit is also matched with a material supply unit, which is used to provide the required film material to the clamping conveyor belt 204 of the material conveying unit.

[0033] Among them, according to Figure 3 As shown, pressure relief ports 205 are provided on the side walls around the channel frame 200. When the film material falls downward from the channel frame 200, the air in the frame will be discharged outward through the pressure relief ports 205 during the falling process of the film material, thereby preventing the film material from being disturbed by the air in the frame during the falling process and causing the falling posture to be seriously tilted or turned over.

[0034] according to Figure 1 , Figure 3 and Figure 4As shown, the material providing unit includes: a loading frame 300 arranged in front of the clamping conveyor belt 204, and a lifting chute 302 is opened on the side walls around the loading frame 300. A pallet 304 is slidably arranged in the loading frame 300 through the lifting chute 302, and the required stacked film materials are placed on the pallet 304; a lifting drive device for driving the pallet 304 to move up and down is provided on the loading frame 300, and the lifting drive device includes: a screw rod 303 that is rotated in the lifting chute 302, and the screw rod 303 is connected to the pallet 304, so that with the rotation of the screw rod 303, the pallet 304 can move up and down in the lifting chute 302, and a double-axis motor 305 is fixedly installed on the outer side wall of the loading frame 300, and the output shafts at both ends of the double-axis motor 305 are connected to the transmission shaft 306, and the end of the transmission shaft 306 transmits power to the screw rod 303 through the bevel gear set 307 to drive the screw rod 303 to rotate, thereby realizing the up and down lifting of the pallet 304. As the film material on the support plate 304 rises, the material picking hand provided at the edge of the loading frame 300 will suck up the film material and then push one end of the film material into the gap of the clamping conveyor belt 204 by means of horizontal pushing, so that the clamping conveyor belt 204 can convey the film material to the channel frame 200.

[0035] according to Figure 1 , Figure 3 and Figure 4 As shown, the material picker includes: a lifting chute 400 opened on the side walls on both sides of the edge of the loading frame 300, the lifting chute 400 is inclined, and a second telescopic push rod 401 is fixedly installed on the side wall of the loading frame 300 near the lifting chute 400, and a connecting frame 402 is fixedly connected to the movable rod of the second telescopic push rod 401, and the connecting frame 402 is driven by the second telescopic push rod 401 to achieve translation, and connecting plates 403 are slidably arranged on the connecting frames 402 on both sides, and edge protrusions 405 are arranged on the edges of the two sides of the connecting plates 403. The connecting plates 403 are slidably connected to the connecting frames 402 through the edge protrusions 405, and the connecting plates 403 can slide up and down in the connecting frame 402, and a vacuum adsorption plate 404 is arranged at the bottom of the connecting plate 403, and a protruding slide bar 406 is arranged at the end of the edge protrusion 405, and the protruding slide bar 406 is placed in the lifting chute 400.

[0036] When in use, the film material is lifted upward by the support plate 304, and after being lifted to a certain height, it contacts the vacuum adsorption plate 404. The film material is first adsorbed by the vacuum adsorption plate 404, and then the second telescopic push rod 401 pushes the connecting frame 402 to move horizontally. During the movement, the protruding slide bar 406 moves obliquely upward in the lifting slide groove 400, thereby guiding the connecting plate 403 to slide upward in the connecting frame 402 through the protruding slide bar 406, and the vacuum adsorption plate 404 moves obliquely upward with the adsorbed film material, and finally moves horizontally on the clamping conveyor belt 2 04, and stuffs the film material into the gap of the clamping conveyor belt 204, then the vacuum adsorption plate 404 releases the film material, and the film material feeding operation is completed. The material picking hand has a simple structure. When grabbing the film material, it only needs to push the connecting frame 402 back and forth to translate through the second telescopic push rod 401, and the connecting plate 403 on the connecting frame 402 moves up and down under the guidance of the lifting slide 400, so that the adsorbed film material is stuffed 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 fail.

[0037] The material conveying unit and the material supply unit are combined to form two usage states, according to Figure 5 As shown, the first use state is: the material conveying unit and the material providing unit are matched and connected as a group, and multiple layers are stacked upward in sequence with the channel frame 200 as the supporting body. In this embodiment, three layers are taken as an example, and the material conveying unit and the material providing unit are stacked upward in sequence through the channel frame 200. The three channel frames 200 are rotatably connected through rotating joints to form a structure as shown in FIG. Figure 5 In the structural state shown, the rotating joints are reinforced by vertical support columns 508. When in use, different film materials are stored on different layers of the material supply units. As the film materials fall in different orders, the film materials will be stacked in the support rack 102 in the expected order. Figure 4 As shown, a weight-reducing opening 301 is opened around the side wall of the loading frame 300, and a weight-reducing opening 301 is also opened on the surface of the pallet 304. The weight-reducing opening 301 realizes a lightweight design structure for the loading frame 300 and the pallet 304, thereby preventing the channel frame 200 from tilting due to the excessive weight of the entire material providing unit in the first use state.

[0038] according to Figure 7 and Figure 8As shown, the second use state is: the support rack 102 and the channel frame 200 are rotationally connected through a rotating joint, that is, the material conveying unit is rotatably set on the support rack 102, and the channel frame 200 of the rotating part is provided with an outer gear ring 600, and the outer gear ring 600 is meshed with the driving gear 601, and the driving gear 601 is rotated by an external driving device, thereby rotating the material conveying unit, 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 material conveying unit and the material supply unit are separated. This embodiment takes three material supply units as an example, and the center lines of the three material supply units converge at the center point of the rotating joint, forming a structure as shown in FIG. Figure 8 In the structural state shown, different film materials are placed on different material providing units, and the channel frame 200 is driven to rotate so that the clamping conveyor belt 204 arranged thereon is matched and aligned with the material providing units at different positions, and then the film materials are transported to the channel frame 200. Subsequently, the channel frame 200 is driven to rotate and align with the supporting rack 102, and then the film materials in the channel frame 200 are released, so that the film materials can fall into the supporting rack 102.

[0039] according to Figure 5 and Figure 6 As shown, the rotary joint includes: 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 are respectively connected to respective components that rotate with each other, according to Figure 5 As shown, in the first use state, the fixed disk 500 and the rotating disk 501 are respectively connected to two upper and lower adjacent channel frames 200, according to Figure 7 As shown, in the second usage state, the fixed plate 500 is installed on the support rack 102, the rotating plate 501 is installed on the channel frame 200 above the support rack 102, and the outer gear ring 600 is fixedly installed on the rotating plate 501 to drive the channel frame 200 to rotate. An annular groove 502 is provided on the fixed plate 500 and the rotating plate 501, and a plurality of balls 503 are provided in the annular groove 502 to make the rotation of the fixed plate 500 and the rotating plate 501 smoother. The inner ring of the fixed plate 500 is fixedly installed with an anti-detachment hook 504, and the anti-detachment hook 504 hooks the rotating plate 501 to prevent the rotating plate 501 from falling off.

[0040] When the channel frames 200 are vertically stacked, the material supply units can be connected more compactly through the rotation joint, and the space occupied is smaller. When supplying film materials, the material supply units only need to be moved to replenish the film materials in the loading frame 300. Therefore, the first use state is suitable for construction in an environment with a small working space. At the same time, in order to avoid the channel frame 200 being skewed due to the center of gravity offset of the material supply unit in the first use state, the position of the material supply unit on the channel frame 200 can be rotated and adjusted by rotating the rotation joint to balance the side load. Figure 5 As shown, if the material supply units are all 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 rotating the joints to stagger the material supply units left and right, the left and right weights can be effectively balanced. At the same time, the interval between the upper and lower material supply units will be larger, making it easier to replenish the film material.

[0041] In the second usage state, a single material conveying unit is matched with multiple material supply units, and they are all arranged at the same plane height. The required plane area is larger than that in the first usage state, but the height is not as high as that in the first usage state. Therefore, when in use, different usage states can be built according to the working environment.

[0042] according to Figure 6 As shown, four positioning holes 506 are evenly arranged on the fixed disk 500, and an insertion rod 507 is slidably penetrated on the rotating disk 501. The insertion rod 507 can match different positioning holes 506 on the fixed disk 500 as the rotating disk 501 rotates, thereby keeping the channel frame 200 from rotating after rotating to a fixed position.

[0043] according to Figure 5 and Figure 7 As shown in the figure, in the first use state, as the number of stacked layers of the channel frame 200 increases, the risk of the topmost layer of the film material deflecting and tilting during the falling process becomes greater, while in the second use state, since the channel frame 200 is not stacked, the height of the film material when it falls is not enough to cause the film material to deflect. In view of the problem that the film material may fall and flip in the first use state, according to Figure 3 As shown, an installation opening 206 is opened on the side walls around the channel frame 200, and a connecting rod 207 is rotatably set in the installation opening 206. A blocking tooth 208 is provided on the connecting rod 207. The blocking tooth 208 is kept in a laterally protruding state by a torsion spring on the connecting rod 207 and the installation opening 206. When the film material falls, the edge of the film material will contact the blocking tooth 208 and press down the blocking tooth 208. The contact process between the film material and the blocking tooth 208 can cushion the falling film material and prevent the film material from deflecting and tilting.

[0044] The above-mentioned embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person skilled in the art, several modifications, improvements and substitutions can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached 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 disposed on the top of the supporting frame (102) and allows 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 mounted 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 mounted 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) mounted 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 to 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 usage states, one of which is: 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 by rotating joints, and the rotating joints are reinforced by vertical support columns (508); The second aspect is that the support frame (102) and the channel frame (200) are rotatably connected via the rotary joint, the channel frame (200) is provided with an outer gear ring (600), the outer gear ring (600) is driven to rotate by meshing with a driving gear (601), an annular 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 annular support plate (602), the center lines of the plurality of material supply units converge at the center point of the rotary joint, and the clamping conveyor belt (204) is aligned with the material supply units at different positions as the channel frame (200) rotates.

2. The film material alternating stacking mechanism according to claim 1, characterized in that: The material supply unit comprises: a loading frame (300), arranged in front of the clamping conveyor belt (204); a lifting chute (302), opened 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) and used for driving the support plate (304) to move up and down; and a material picker, arranged on the edge of the loading frame (300) and used for delivering the material in the frame to the clamping conveyor belt (204).

3. The film material alternating stacking mechanism according to claim 2, characterized in that: The lifting drive device comprises: a screw rod (303) rotatably disposed in the lifting slide groove (302), the screw rod (303) being connected to the support plate (304); a double-axis motor (305) disposed on a side wall of the loading frame (300); and 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.

4. The film material alternating stacking mechanism according to claim 3 is characterized in that: The material picker comprises: 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 thereof; 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 is placed in the lifting chute (400).

5. The film material alternating stacking mechanism according to claim 4, characterized in that: 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).

6. The film material alternating stacking mechanism according to claim 5, 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 an 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.

7. The film material alternating stacking mechanism according to claim 6, characterized in that: Also includes: The pressure relief port (205) is provided on the side walls around the channel frame (200); and the loading frame (300) and the support plate (304) are both provided with a weight reduction port (301).

8. The film material alternating stacking mechanism according to claim 7, 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.

9. The film material alternating stacking mechanism according to claim 8, 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).

10. A PCB pre-pressing device using the film material alternating stacking mechanism according to any one of claims 1 to 9, 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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