CN108499812A - The production system of circuit board dual coating - Google Patents

Abstract

The present invention relates to the production systems of circuit board dual coating, it includes setting gradually panel assembly, panel turnover device, coating unit, solidification equipment and catcher, wherein panel turnover device includes engine base, circuit board can be sent into coating unit and take out the circuit board that single side coating is completed from coating unit by the rollover stand being turningly arranged around horizontal direction on engine base, the transport mechanism for being arranged on rollover stand and capable of realizing circuit board level transmission and the driving mechanism for driving rollover stand to overturn, wherein transport mechanism；Rollover stand is an overturning period with 180 °, and the circuit board after overturning is in horizontality every time.The present invention is under the premise of one-step solidification, complete the dual coating work of circuit board, it can not only automated production, nor it needs manually to go to carry circuit board, in addition, efficient, cost low row overturning, then the circuit board after overturning is transmitted to coating unit again, to realize the two-sided coating of circuit board.

Description

Production system for double-sided coating of circuit boards

technical field

The invention belongs to the field of circuit board processing equipment, and in particular relates to a production system for double-sided coating of circuit boards.

Background technique

Currently, the circuit board production process is as follows:

Upper plate→coat glue on the front of the plate→cure→ultraviolet inspection→transfer plate by turning machine→lower plate→upward plate→coat glue on the back of the plate→cure→ultraviolet inspection→turn plate transfer→lower plate.

Therefore, it has the following technical defects:

1. When two identical devices are required to complete the automatic coating of glue on the surface of the circuit board, the two devices occupy a large space, the cost of the equipment is high, and the work efficiency is relatively low;

2. When using a line of water equipment, because the line is too long, after the lower plate, it needs to be manually transported to the upper plate for double-sided coating. Therefore, automatic processing cannot be realized, and the manual labor intensity is relatively high.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a brand-new production system for double-sided coating of circuit boards, which can complete the double-sided coating of circuit boards under the premise of one-time curing. Automated production, and there is no need for manual handling of circuit boards.

In order to solve the above technical problems, the present invention adopts the following technical solutions:

A production system for double-sided coating of circuit boards, comprising

A board loading device capable of transferring circuit boards piece by piece;

A coating device, which is used to apply glue to the upper surface of the circuit board that needs to be coated with glue;

A curing device, which is used to dry the glue coated on the surface of the circuit board;

Board receiving device, which can collect the coated circuit boards one by one;

In particular, the production system also includes a turning device arranged between the upper plate device and the coating device. The transmission mechanism that can realize the horizontal transmission of the circuit board, and the driving mechanism for driving the turning frame to turn over, wherein the transmission mechanism can send the circuit board into the coating device and take out the circuit that has completed one-sided coating from the coating device board; the flip frame takes 180° as a flip cycle, and the circuit board after each flip is in a horizontal state.

Preferably, the flipping device further includes an adjusting plate arranged inside the flipping frame and capable of moving horizontally along the axis of rotation of the flipping frame. On the adjustment plate and/or the flip rack inside the channel. Therefore, the panel turning device in the present application can be adjusted and set according to circuit boards of different sizes, thereby enhancing its practicability.

Specifically, a guide rod and a screw rod that traverse the adjustment plate are also provided on the top of the reversing frame. Next, the screw rod rotates around its own axis, and the adjusting plate moves laterally to change the width of the channel.

According to a specific implementation and preferred aspect of the present invention, the conveying mechanism includes the pinch unit positioned on the adjustment plate on both sides of the channel and the inner wall of the overturn frame respectively, and a drive unit for driving the pinch unit to move synchronously, wherein the pinch unit forms The clamping part clamps the two opposite sides of the circuit board for horizontal transfer under the operation of the clamping unit.

Preferably, the pinching unit includes an upper endless conveyor belt assembly and a lower endless conveyor belt assembly arranged up and down and forming a clamping portion whose thickness matches the side of the circuit board.

Further, the upper endless conveyor belt assembly and the lower endless conveyor belt assembly are arranged symmetrically up and down with respect to the clamping part. The upper endless conveyor belt assembly includes transmission wheels located at both ends of the inversion frame for feeding and discharging materials, and a conveyor belt sleeved on the outer circumference of the two transmission wheels, wherein A nip is formed between the lower belt portion of the upper endless conveyor assembly and the upper belt portion of the lower endless conveyor assembly.

Specifically, the upper endless conveyor belt assembly further includes a set of tensioning pulleys disposed away from the clamping portion, and the conveyor belt is respectively wound on the transmission pulley and the set of tensioning pulleys.

According to yet another specific implementation and preferred aspect of the present invention, the tensioning pulley set includes three tensioning pulleys distributed in the shape of a "pin", wherein the conveyor belt is sleeved on the tensioning pulley at the upper part of the "pin", and the remaining two tensioning pulleys The tight wheel is pressed on the outside of the conveyor belt.

According to yet another specific implementation and preferred aspect of the present invention, the drive unit includes a connecting shaft for synchronously connecting the tension pulleys on the upper part of the endless conveyor belt assembly on both sides or the lower endless conveyor belt assembly on both sides, and is used to drive the connecting shaft Rotating motor and transmission belt, wherein the two ends of the connecting shaft are respectively rotatably arranged on opposite sides of the turning frame.

Preferably, the drive unit further includes gears that rotate synchronously with the transmission wheels respectively, wherein the gears arranged up and down from one end or both ends of the upper endless conveyor belt assembly and the lower endless conveyor belt assembly are engaged with each other.

Preferably, the overturning frame is rotatably arranged on the machine base through the overturning shaft, wherein the overturning shaft is arranged in the middle of the overturning frame.

The driving mechanism includes a pulley assembly and a driving motor located on one side of the turning frame and used to drive the turning shaft to rotate around its own axis.

In addition, the production system also includes an ultraviolet inspection device arranged between the curing device and the receiving device.

Specifically, the part of the surface of the circuit board that has been coated with glue can change color under the irradiation of ultraviolet light emitted by the ultraviolet inspection device. When all glued parts are completely discolored, it means that the coating process of the circuit board meets the product requirements; when the circuit board There is no discoloration at one or more sizing parts of the circuit board, indicating that the circuit board is missing glue coating.

At the same time, when the test is qualified, the ultraviolet inspection device pushes the product to the receiving device; when there is a circuit board with missing coating, the ultraviolet inspection device collects the product. Therefore, through the arrangement of the ultraviolet inspection device, its main purpose is to completely prevent unqualified products from flowing into the board receiving device.

Due to the implementation of the above technical solutions, the present invention has the following advantages compared with the prior art:

The present invention completes the double-sided coating of the circuit board under the premise of one-time curing, which not only enables automatic production, but also does not require manual handling of the circuit board. In addition, the efficiency is high and the cost is low.

Description of drawings

Fig. 1 is the structural representation of production system of the present invention;

Fig. 2 is a three-dimensional structural schematic diagram of the turnover device in Fig. 1;

Fig. 3 is a schematic structural view of the pinch unit in Fig. 2;

Among them: ①, plate upper device; ②, plate turning device; 1, machine base; 2, turning frame; 20, turning shaft; 3, transmission mechanism; 30, pinch unit; Wheel; 301, conveyor belt; 302, tensioning wheel group; 302a, tensioning wheel; 30b, lower endless conveyor belt assembly; a, clamping part; 31, drive unit; 310, connecting shaft; 311, motor; 312, transmission belt; 313. Gear; 4. Driving mechanism; 40. Pulley assembly; 41. Driving motor; 5. Adjusting plate; 6. Guide rod; 7. Screw rod; ; ④, curing device; ⑤, ultraviolet inspection device; ⑥, receiving board device.

Detailed ways

In order to make the above-mentioned purpose, features and advantages of the present application more obvious and understandable, the specific implementation manners of the present application will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the application. However, the present application can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial" , "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the application and simplifying the description, rather than indicating or implying the referred device or Elements must have certain orientations, be constructed and operate in certain orientations, and thus should not be construed as limiting the application.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In this application, terms such as "installation", "connection", "connection" and "fixation" should be interpreted in a broad sense, for example, it can be a fixed connection or a detachable connection, unless otherwise clearly specified and limited. , or integrated; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise specified limit. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.

In the present application, unless otherwise clearly specified and limited, a first feature being "on" or "under" a second feature may mean that the first and second features are in direct contact, or that the first and second features are indirect through an intermediary. touch. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions are for the purpose of illustration only and are not intended to represent the only embodiment.

As shown in Figure 1, the production system for double-sided coating of circuit boards includes a board loading device ①, a board turning device ②, a coating device ③, a curing device ④, an ultraviolet inspection device ⑤, and a board receiving device ⑥ arranged in sequence. .

Specifically, the loading device ① can transfer the circuit board B one by one; the turning device ② is used to realize the flipping and transferring of the circuit board B; the coating device ③ is used to apply glue to the upper surface of the circuit board that needs to be coated with glue ;The curing device ④ is used to dry the glue coated on the surface of the circuit board; the ultraviolet inspection device ⑤ is used to check whether there is missing coating on the part of the circuit board surface to be coated with glue; the receiving device ⑥ can be collected piece by piece Coated circuit boards (also inspected to pass);

As shown in Figures 2 and 3, the turnover device ② includes a machine base 1, a turning frame 2 arranged on the machine base 1 so as to turn around the horizontal direction, and a transfer frame which is arranged on the turning frame 2 and can realize the horizontal transmission of the circuit board B. Mechanism 3, and the drive mechanism 4 that is used to drive the overturning frame 2 to turn over, wherein the conveying mechanism 3 can send the circuit board B into the coating device and take out the circuit board that has completed single-side coating from the coating device; 180° is a turning cycle, and the circuit board B after each turning is in a horizontal state.

In this example, when coating, the circuit board B is first conveyed to the coating device through the turning device, so that after the single-sided coating of the circuit board B is completed, the circuit board B is returned to the turning device for turning over ( 180°), and then transfer the flipped circuit board to the coating device again to achieve double-sided coating of the circuit board.

At the same time, in order to meet the coating of circuit boards of different sizes, the turning device in this example also includes an adjusting plate 5 that is arranged inside the turning frame 2 and can move horizontally along the direction of the turning axis of the turning frame 2. 5 and the inner wall on one side of the flip frame 2 form a channel for the transmission of the circuit board B.

Specifically, a guide rod 6 and a screw mandrel 7 that traverse the adjustment plate 5 are also provided on the top of the reversing frame 2, and the turning device also includes a driving member that is arranged on the reversing frame 2 to drive the rotation of the axis of the screw rod 7 itself. 8, wherein driven by the driving member 8, the screw rod 7 rotates around its own axis, and the adjusting plate 5 moves laterally to change the width of the channel.

In this example, there are two guide rods 6 arranged parallel to the screw rod 7 , and the two guide rods 6 are arranged symmetrically with respect to the screw rod 7 .

The conveying mechanism 3 includes a pinch unit 30 positioned on the adjustment plate 5 on both sides of the channel and the inner wall of the overturn frame 2, and a drive unit 31 for driving the pinch unit 30 to move synchronously, wherein the pinch unit 30 forms a clamping portion a , under the operation of the clamping unit 30, the clamping part a clamps the two opposite sides of the circuit board B and transfers it horizontally.

Specifically, the pinching unit 30 includes an upper endless conveyor belt assembly 30 a and a lower endless conveyor belt assembly 30 b arranged up and down and forming a clamping portion a whose thickness matches the side of the circuit board.

The upper endless conveyor belt assembly 30a and the lower endless conveyor belt assembly 30b are disposed symmetrically up and down with respect to the clamping portion a (thus, only the upper endless conveyor belt assembly 30a needs to be described in detail in this example).

The upper endless conveyor belt assembly 30a includes transmission wheels 300 located at both ends of the inversion frame 2 for feeding and discharging materials, a conveyor belt 301 sleeved on the outer circumference of the two transmission wheels 300, and a tensioning wheel set 302 arranged away from the clamping part a. A clamping portion a is formed between the lower part of the conveyor belt 301 of the endless conveyor belt assembly 30a and the upper part of the conveyor belt 301 of the lower endless conveyor belt assembly 30b.

The tensioning wheel set 302 includes three tensioning wheels 302a distributed in the shape of a character, wherein the conveyor belt 301 is sleeved on the tensioning wheel 302a located at the upper part of the character, and the remaining two tensioning wheels 302a are pressed on the conveyor belt 301 outside.

The driving unit 31 includes a connecting shaft 310 for synchronously connecting the tension pulley 302a on the upper part of the endless conveyor belt assembly 30b on both sides, a motor 311 and a transmission belt 312 for driving the connecting shaft 310 to rotate, wherein the two ends of the connecting shaft 310 The parts are respectively rotatably arranged on the opposite side plates of the reversing frame 2.

Further, the drive unit 31 also includes gears 313 that rotate synchronously with the transmission wheels 300 respectively, wherein the gears 313 disposed up and down from one end of the upper endless conveyor belt assembly 30a and the lower endless conveyor belt assembly 30b are engaged with each other.

In addition, the overturning frame 2 is rotatably arranged on the machine base 1 through the overturning shaft 20 , wherein the overturning shaft 20 is arranged in the middle of the overturning frame 2 .

The driving mechanism 4 includes a pulley assembly 40 and a driving motor 41 located on one side of the turning frame 2 and used to drive the turning shaft to rotate around its own axis.

Then, in this example, the glue used can change color (or reflect light) under the irradiation of ultraviolet rays. Therefore, the part of the surface of the circuit board B that has been coated with glue can change color under the irradiation of ultraviolet light emitted by the ultraviolet inspection device ⑤. When all the gluing parts are all discolored, it means that the circuit board coating process meets the product requirements; when one or more gluing parts of the circuit board do not change color, it means that the circuit board is missing glue coating.

Then, when the test is qualified, the ultraviolet inspection device ⑤ pushes the product to the receiving device ⑥; when there is a circuit board with missing coating, the ultraviolet inspection device collects the product. Therefore, through the arrangement of the ultraviolet inspection device, its main purpose is to completely prevent unqualified products from flowing into the board receiving device.

At the same time, ultraviolet rays can further ensure the effect of glue curing.

In summary, the implementation process of this embodiment is as follows:

From the upper board device to the clamping part of the turning device one by one, the circuit board to be coated with glue is sent horizontally, and then under the conveyance of the clamping unit, the circuit board is sent to the coating device with the front facing up, by The coating device coats the position where the glue needs to be coated on the surface. After the front side coating of the circuit board is completed, the circuit board is returned to the clamping part of the clamping unit, and the entire turning frame is driven to turn 180 degrees around the turning axis. °Finally, the back of the circuit board is set up at this time, and then the circuit board is sent to the coating device for fixed-point coating on the back again to complete the coating on both sides of the circuit board, and then the coated circuit board is sent into the curing furnace Drying process is carried out in the middle, and then under the inspection of the ultraviolet inspection device, the unqualified products are collected, and the qualified products are sent to the receiving device for receiving.

The present invention has been described in detail above, and its purpose is to allow those familiar with this field to understand the content of the present invention and implement it, and can not limit the scope of protection of the present invention. Effect changes or modifications should be covered within the protection scope of the present invention.

Claims (10)

1. A production system for double-sided coating of circuit boards, comprising A board loading device capable of transferring circuit boards piece by piece; A coating device, which is used to apply glue to the upper surface of the circuit board that needs to be coated with glue; A curing device, which is used to dry the glue coated on the surface of the circuit board; Board receiving device, which can collect the coated circuit boards one by one; It is characterized in that: the production system further includes a turning device arranged between the upper plate device and the coating device, and the turning device includes a machine base, which is turned around the horizontal direction and arranged on the The overturn frame on the base, the transmission mechanism arranged on the overturn frame and capable of realizing the horizontal transmission of the circuit board, and the driving mechanism for driving the overturn of the overturn frame, wherein the transmission mechanism can transfer the circuit board The board is sent into the coating device and the circuit board that has been coated on one side is taken out from the coating device; the flipping rack takes 180° as a flipping cycle, and the circuit board after each flipping is in the level state. 2. The production system for double-sided coating of circuit boards according to claim 1, characterized in that: the flipping device also includes an axis of rotation that is arranged inside the flipping frame and can rotate along the flipping frame An adjustment plate that moves horizontally in the line direction, the adjustment plate and the inner wall on one side of the flip frame form a channel for the transmission of circuit boards, and the transmission mechanism is arranged on the adjustment plate and/or the flip inside the channel on the shelf. 3. The production system for double-sided coating of circuit boards according to claim 2, characterized in that: a guide rod and a screw mandrel crossing the adjusting plate are also provided on the top of the turning frame, and the The turnover device also includes a driving member arranged on the turning frame for driving the rotation of the axis of the screw rod itself, wherein driven by the driving member, the screw rod rotates around its own axis, and the The adjusting plate moves laterally thereupon to change the width and narrowness of the passage. 4. The production system for double-sided coating of circuit boards according to claim 2, characterized in that: the transmission mechanism includes the adjusting plate and the inner wall of the turning frame respectively positioned on both sides of the channel pinch unit, a drive unit for driving the pinch unit to move synchronously, wherein the pinch unit forms a clamping part, and when the pinch unit is running, the clamping part clamps the Horizontal transfer of opposite sides of the board. 5. The production system for double-sided coating of circuit boards according to claim 4, characterized in that: the pinch unit includes the clamping portion arranged up and down and formed to match the thickness of the side of the circuit board The upper endless conveyor assembly and the lower endless conveyor assembly. 6. The production system for double-sided coating of circuit boards according to claim 5, characterized in that: the upper endless conveyor belt assembly and the lower endless conveyor belt assembly are symmetrically arranged up and down with respect to the clamping part, and the upper endless conveyor belt assembly The endless conveyor belt assembly includes drive wheels located at the two ends of the inversion frame for feeding and discharging materials, and a conveyor belt sleeved on the outer circumference of the two drive wheels. The above-mentioned clamping part is formed between the upper parts of the conveyor belts. 7. The production system for double-sided coating of circuit boards according to claim 6, characterized in that: said upper endless conveyor belt assembly also includes a set of tensioning wheels arranged away from said clamping portion, said The tensioning pulley set includes three tensioning pulleys distributed in the shape of a character, wherein the conveyor belt is sleeved on the tensioning pulley located at the upper part of the font, and the remaining two tensioning pulleys are pressed on the outside of the conveyor belt. 8. The production system for double-sided coating of circuit boards according to claim 7, characterized in that: the drive unit includes a drive unit for placing the upper endless conveyor assembly on both sides or the lower endless conveyor assembly on both sides The connecting shaft synchronously connected to the tensioning wheel on the upper part of the character font, the motor and the transmission belt used to drive the connecting shaft to rotate, wherein the two ends of the connecting shaft are respectively rotatably arranged on the opposite two sides of the turning frame side. 9. The production system for double-sided coating of circuit boards according to claim 8, characterized in that: the drive unit also includes gears that rotate synchronously with the drive wheels respectively, wherein the upper endless conveyor belt assembly It is arranged in mesh with the gear arranged up and down from one end or both ends of the lower endless conveyor belt assembly. 10. The production system for double-sided coating of circuit boards according to claim 1, characterized in that: the production system further comprises an ultraviolet inspection device arranged between the curing device and the board receiving device, The ultraviolet inspection device described therein can simultaneously carry out ultraviolet inspection on the front and back of the coated circuit board.