CN1642388A - Method and device for PCB ink plug hole with scraper - Google Patents

Abstract

The invention discloses a method and a device for plugging holes in PCB (printed Circuit Board) ink by using a scraper, wherein the method is mainly characterized in that the scraper is rotated to an inclination angle at the end side of an ink plugging path of a substrate so as to push and touch the surface of the substrate to perform ink plugging processing; and a driving member drives at least one flexible rectangular scraper on the scraper seat to form the ink hole plugging device, so that the scraper can be rotated and swung to scrape ink on the substrate to perform hole plugging operation.

Description

Method and device for PCB ink plug hole with scraper

technical field

The invention relates to a method and device for ink plugging holes on a PCB, in particular to a technique for filling ink plugs into holes to be processed on a board surface by using a scraper.

Background technique

A known printed circuit board (PCB, hereinafter referred to as the substrate 1) is composed of several layers of conductive copper plates 11 and insulating plates 12, and the substrate 1 is drilled with a number of guide holes 13 penetrating through the board surfaces of both ends of the substrate. Blind holes 14 of equal depth. The guide holes 13 can be connected between the conductive copper plates 11 of various layers in the substrate, and the blind holes 14 can be connected to the conductive copper plates 11 of required layers in the substrate 1 (as shown in FIG. 1 a ).

As we all know, in the PCB production process, operations such as plated holes, etching, and coating green paint ink must be performed on the substrate, and then the ink 15 is coated on the surface of the substrate 1 by means of screen printing (as shown in FIG. 1b), but its disadvantage is that air bubbles are likely to be generated during the painting process, and defective products are likely to be generated in the subsequent baking operation, and the ink 15 is likely to be caused by the guides drilled on the substrate 1 during screen printing. The bottom of hole 13 leaks out, and derives the problem of defective product.

At present, there is a traditional substrate production method, which can be seen in Taiwan Patent Announcement No. 545289, which discloses a technology of "coating device for roller coater". Cloth the ink 15, and then use a pair of relative plug hole scrapers 16 to scrape off the ink 15 (as shown in Figure 1c), and simultaneously fill the guide hole 13 and the blind hole 14 on the substrate 1 with the ink 15, and Solve the problem of ink 15 foaming or leakage.

However, in the above-mentioned roller coating device, the blade position of the scraper 16 used in it needs to be processed with a beveled surface 161, thereby increasing the production cost of the scraper, and causing the strength of the scraper to weaken, and the durability is relatively poor. The linear direction exerts a force to push the ink 15 on the surface of the substrate 1, so there is also a problem that the direction of the force cannot be changed, so that the durability of the scraper is not good, which still needs to be improved.

Invention content

The purpose of the present invention is to provide a method for PCB ink plugging with a scraper to improve the technical shortcomings of the traditional scraper to push and scrape the ink on the substrate surface in a vertical linear direction, and to increase its production efficiency.

Another object of the present invention is to provide a device for use in a method of ink plugging of a PCB with a doctor blade.

In order to achieve the above object, the present invention provides a method for PCB ink plugging with a scraper, including in a roller coater, using a pair of coating rollers to clamp the substrate to coat the ink, so that the substrate enters the coating The path of the ink plug hole at the discharge end of the roller, and then a jaw lowers to clamp the substrate and when it rises at a constant speed, at least one scraper is used on the end side of the path of the ink plug hole, and a tilt angle is used to push and touch the constant speed rise The surface of the substrate in the process, and then fill the ink on the surface into the processing hole.

In the above method of using a scraper to form the ink plug hole of the PCB, the path of the ink plug hole is between the discharge end of the coating roller and the upper jaw.

In the above method of using a scraper to plug the PCB ink hole, the scraper can return to a position where it does not touch the substrate surface.

The present invention also provides a device for PCB ink plug hole with a scraper, which is arranged in a roller coating machine with a coating roller, and is characterized in that: at least one end side of an ink plug hole path, a scraper seat is set A scraper with a rectangular cross-section is installed on the scraper seat, and a driving member is provided to drive the scraper on the scraper seat to rotate at a fixed angle to push and touch the surface of the substrate.

In the above-mentioned device for making PCB ink plug holes with a scraper, the path of the ink plug holes is located at the discharge end of the coating roller.

In the above-mentioned device for making PCB ink plug holes with a scraper, the scraper seat includes a seat and its seat cover, which are used to clamp and lock the scraper with a rectangular section.

In the above-mentioned device for using a scraper to plug the PCB ink hole, the knife seat is an L-shaped knife seat.

In the above-mentioned device for making PCB ink plug holes with a scraper, the knife seat is locked on the base of the scraper seat through a quick release knob.

In the above-mentioned device for making PCB ink plug holes with a scraper, the scraper seat includes end plates on both sides, and each end plate has a fulcrum and a pivot shaft, and the fulcrum is pivotally connected to the fixed seat on the end side of the machine. It is used for supporting and pivoting the scraper seat, and the pivot shaft is used for pivoting the driving member.

In the above-mentioned device for making PCB ink plug holes with a scraper, the driving member is a pneumatic cylinder.

In the above-mentioned device for making PCB ink plug holes with a scraper, the seat end of the pneumatic cylinder is pivoted on a slider, and a first adjusting screw is provided to guide the displacement of the slider.

In the above-mentioned device for using a scraper to plug the PCB ink hole, a positioning handle is provided above the slider to fix the slider.

In the above-mentioned device for PCB ink plugging with a scraper, the scraper, scraper seat and driver are all arranged on a slide table, and the slide table is slidably arranged on the slide rail of the machine table.

In the above-mentioned device for making PCB ink plug holes with a scraper, a guide seat is provided at the bottom of the slide table, and a second adjusting screw is provided to adjust and guide the guide seat.

In the above-mentioned device for making PCB ink plug holes with a scraper, the driving member is a motor with fixed-angle rotation capability.

In the above-mentioned device for making PCB ink plug holes with a scraper, the driving member is a rotary pneumatic cylinder with fixed-angle rotation capability.

In the above-mentioned device for plugging PCB ink holes with a scraper, the driving member directly drives the support shaft provided on the end plate on one side of the scraper seat, so that the scraper on the scraper seat rotates at a fixed angle.

Due to the adoption of the above design, the present invention has the following advantages: the present invention uses at least one scraper seat to fix the scraper with flexible force, and a driving member to drive the scraper seat to generate a swing at a specific angle of force to perform ink scraping. hole, wherein the scraper presents a shape of rectangular cross-section, which has the effect of increasing the durability of the scraper, and uses one end corner of the rectangular cross-section as the blade portion, without the need to cut a bevel, so the production cost of the scraper can be reduced and the length of the scraper can be extended. The service life of the scraper.

Description of drawings

Figure 1a is a partial cross-sectional view of the substrate of the workpiece, illustrating that the substrate is composed of several layers of copper plates and insulating material plates, and drilled with several guide holes or blind holes of different depths.

Fig. 1b is a partial cross-sectional view of the substrate surface of the workpiece coated with an ink layer, illustrating the state that the ink layer is difficult to directly and fully fill the guide hole or the blind hole.

Fig. 1c is a partial cross-sectional view of a substrate coated with ink for ink plugging process, illustrating the state of using a traditional scraper to scrape and fill ink on the surface of the substrate into the guide hole or the blind hole.

Fig. 2 is a schematic diagram of the basic configuration of the present invention in a roller coating machine, illustrating that there is an ink plug hole path between the coating roller and the jaws, and a swivel scraper is provided at the end of the path.

Fig. 3 is a schematic diagram of the front-end procedure of the present invention to execute the ink plug hole, illustrating the state that the substrate is lifted into the path of the ink plug hole with a pair of coating rollers.

FIG. 4 is a schematic diagram of a mid-stage process of executing the ink plug hole according to the present invention, illustrating a state in which a clamping jaw is lowered to clamp the substrate.

FIG. 5 is a schematic diagram of another middle-stage process of executing the ink plug hole according to the present invention, illustrating that when the clamping jaws hold the substrate, the scraper is pushed out to an inclined angle to push the state of the substrate surface.

Figure 6 is a schematic diagram of the second stage of the ink plug hole execution process of the present invention, illustrating that when the scraper pushes the substrate surface obliquely, the substrate will rise after being clamped by the jaws, and the scraper will push the substrate obliquely to scrape the substrate The ink on the surface is in the state of plugging operation.

Fig. 7 is a plan view of an embodiment of the ink plug hole device of the present invention, illustrating that the scraper is fixed on a scraper seat adjacent to the end side of the path of the ink plug hole, and a pneumatic cylinder is used as a driving member to drive the scraper to generate a fixed angle of rotation pendulum operation.

Fig. 8 is a partial top view of the ink plug hole device of the embodiment in Fig. 7, illustrating that the end of the scraper seat is connected with an end plate, and the pneumatic cylinder is connected through the end plate, and the configuration of the pneumatic cylinder can be fine-tuned for displacement and fixed components.

FIG. 9 is a partially enlarged schematic view of FIG. 7 to match the description of the ink plug hole device shown in FIG. 8 , and shows a state in which the pneumatic cylinder pushes the scraper to an inclination angle.

FIG. 10 is another partially enlarged schematic diagram of the present invention, illustrating that the scraper shown in FIG. 9 is driven by the pneumatic cylinder to return to the original position where it does not touch the substrate.

Fig. 11 is an exploded plan view of the components of the scraper holder of the present invention, illustrating the assembly relationship of a base combined with end plates on both sides and an L-shaped knife holder, and using the L-shaped knife holder and a cover to clamp and lock the flexible rectangular scraper. And the end plate can be configured to be pivotally connected to the pneumatic cylinder and pivotally arranged on the fixed base of the machine table.

Figure 12 is a plan view of another embodiment of the ink plug hole device, illustrating that the scraper is fixed on a scraper seat adjacent to the end of the path of the ink plug hole, and uses a motor with fixed-angle rotation capability or a rotary pneumatic cylinder as a driving member , to drive the scraper to produce a fixed-angle swing action.

Detailed ways

First, as shown in Figure 2, it is revealed that between a group of coating rollers 52 of a roller coating machine and another upper jaw 2, there is an ink plug hole path 6, and one end of each coating roller 52 is provided with a scraper 51 to scrape off excess green paint ink on the coating roller 52, and at the discharge end 61 of the coating roller 52, at least one scraper 31 is provided.

The present invention carries out the method for PCB ink plug hole with scraper, is in a roller coater, with a pair of coating rollers 52 spin-clamp substrate 1 rises and enters ink plug hole path 6 (as shown in Figure 3), to substrate 1 When carrying out the operation of coating ink 15, lower and clamp the substrate 1 (as shown in Figure 4) by the gripper 2 simultaneously, and do the action of pulling up the substrate 1 at a uniform speed (as shown in Figure 5), at this moment, pass at least A scraper 31 rotates to an inclined angle to push and touch the surface of the substrate 1, and as the jaw 2 pulls the substrate 1 up, pushes and scrapes the ink on the surface of the substrate 1 (as shown in Figure 6), so that the ink Filling into the holes to be processed on the surface of the substrate (including blind holes and guide holes) to complete the ink plug hole procedure.

And, the present invention adopts a kind of ink plug hole device, as shown in Figure 7, Figure 12, is to be arranged in a roller coating machine, comprises the use of a flexible rectangular scraper 31 at least, and it is installed on a scraper seat 3 , and then at least one driver 4 drives the fixing seat 3 of the scraper 31 to form the ink plug hole device to perform the above-mentioned method of using a scraper for PCB ink plug holes; wherein:

The scraper seat 3 is arranged on the end side (as shown in Figure 7 ) of the ink plug hole path 6 of the discharge end 61 of the ink roller 52; Use a quick-release knob 37 to lock an L-shaped knife seat 33, and use a screw lock to assemble another seat cover 34 on the L-shaped knife seat 33, so as to facilitate the locking flexibility between the L-shaped knife seat 33 and the seat cover 34. Rectangular scraper 31 (as shown in Figure 8 and Figure 11); A shaft 361 and another pivot shaft 362 are formed on the end plate 36, and the shaft 361 is pivotally connected to the fixed seat 30 on the end side of the machine (with reference to Figure 8 and shown in FIG. 9 ), to hold and pivot the scraper seat 3, and the pivot shaft 362 can be used as the pivot end of the driving member 4. In this embodiment, the pneumatic cylinder 41 is used as the driving member 4 , so that the head end of the cylinder rod 410 is pivotally connected to the pivot shaft 362 of the end plate 36 (as shown in Figure 11), and the scraper seat 3 on the end plate 36 is pushed by the pneumatic cylinder 41 to swing at a specific angle or return to the original position. Push and touch the original position of the substrate (as shown in Figure 9 and Figure 10).

In practice, the seat end of the above-mentioned pneumatic cylinder 41 can be pivotally placed on the machine table, or as in the above-mentioned embodiment shown in FIGS. 8 and 9), the slider 7 is guided by the rotation of a first adjusting screw 71 pivotally placed on the wall plate 73, so that the user can slightly adjust the arrangement angle of the pneumatic cylinder 41 to drive the scraper seat 3 In addition, a stroke hole 70 is provided on the upper wall plate 73 of the slider 7 to pass through an adjustable positioning handle 72, so that when the first adjustment screw 71 drives the slider 7 to move to the desired position, it can The slider 7 is fixed by positioning the stem at the bottom end of the handle 72 .

The fixed seat 30 used by the double-sided end plates 36 of the above-mentioned pivoting scraper seat 3, and the wall plate 73 used for setting the first adjustment screw 71 and the positioning handle 72 are all fixed on a slide table 74, and the bottom end of the slide table 74 Sliding on the slide rail 75 (as shown in Figure 7), and the bottom of the slide table 74 can use a guide seat 76 to accept the second adjustment screw 77 for position adjustment, so that the main body of the above-mentioned ink plug hole device can be placed on the machine table Make fine adjustments on the top to keep the best driving distance of the scraper from the ink plug hole path 6.

The above-mentioned scraper 31 (as shown in Figure 9 ) with a rectangular section is made of flexible rubber or PU material, and the blade 310 of the scraper directly adopts the thick end corner of the rectangular cutter body, so the blade 310 can be increased. Durable strength.

Above-mentioned scraper 31, scraper holder 3 and drive member 4 are implemented (as shown in Figure 7), can be arranged on the two end sides of ink plug hole path 6, in order to push and scrape the ink on the board surface at both ends of the substrate, carry out ink Plug hole work.

Furthermore, the above-mentioned pneumatic cylinder 41 of the present invention can also be replaced with an oil hydraulic cylinder to produce the same swinging action of pushing the scraper 31 to produce a fixed angle. Alternatively, the above-mentioned driving member 4 of the present invention can also be a motor 42 (as shown in FIG. 12 ) with fixed-angle rotation capability in practice, directly driving the fulcrum 361 on one side end plate 36 of the scraper holder 3, To make the scraper base 3 rotate at a fixed angle, and the motor 42 with fixed-angle rotation capability can use a servo motor, a stepping motor or a rotary pneumatic cylinder, which also belongs to the application field contemplated by the present invention.

The ink plugging device disclosed above can be used to implement the above-mentioned method of using a scraper for PCB ink plugging, but it is only a preferred embodiment of the present invention, and is not intended to limit the present invention, so all claims according to the present invention Equivalent changes made within the range should be included within the protection scope of the present invention.

Claims (17)

1. A method for PCB ink plugging with a scraper, characterized in that: it is included in a roller coater, and a pair of coating rollers are used to spin the substrate to coat the ink, so that the substrate enters the coating roller discharge The path of the ink plug hole at the end, and then the substrate is clamped by a jaw and when it rises at a constant speed, at least one scraper is used on the end side of the path of the ink plug hole, and an inclination angle is used to push and touch the substrate in the constant speed rise The board surface, and then fill the ink on the board surface into the processing hole. 2. The method of using a scraper to make PCB ink plug hole according to claim 1, characterized in that: the path of the ink plug hole is between the discharge end of the coating roller and the upper jaw. 3. The method of using a scraper for PCB ink plug hole according to claim 1, characterized in that: the scraper can swing back to a position where it does not touch the surface of the substrate. 4. A device for PCB ink plug hole with a scraper, which is arranged in a roller coater with a coating roller, characterized in that: at least one end side of an ink plug hole path, a scraper seat, a scraper seat A scraper with a rectangular cross-section is installed on the top, and a driving member is provided to drive the scraper on the scraper seat to swing at a fixed angle to push and touch the substrate surface. 5. The device for making PCB ink plug holes with a scraper according to claim 4, characterized in that: the path of the ink plug holes is located at the discharge end of the coating roller. 6 . The device for plugging PCB ink holes with a scraper according to claim 4 , wherein the scraper seat includes a seat and its cover for clamping and locking the scraper with a rectangular section. 7. The device for plugging PCB ink holes with a scraper according to claim 6, wherein the knife seat is an L-shaped knife seat. 8. The device for plugging PCB ink holes with a scraper according to claim 6, wherein the knife seat is locked on the base of the scraper seat through a quick release knob. 9. The device for making PCB ink plug holes with a scraper according to claim 4, characterized in that: the scraper seat includes end plates on both sides, and each end plate has a fulcrum and a pivot shaft, and the fulcrum pivots Connected to the fixed seat on the end side of the machine table, it is used to hold and pivot the scraper seat, and the pivot shaft is used to pivotally connect the driving member. 10. The device for making PCB ink plug holes with a scraper according to claim 4, characterized in that: the driving part is a pneumatic cylinder. 11. The device for making PCB ink plug holes with a scraper according to claim 10, characterized in that: the seat end of the pneumatic cylinder is pivoted on a slider, and a first adjusting screw is provided to guide the displacement of the slider. 12. The device for plugging PCB ink holes with a scraper according to claim 11, wherein a positioning handle is provided above the slider to fix the slider. 13. The device for plugging PCB ink holes with a scraper according to claim 4, characterized in that: the scraper, the scraper seat and the driving part are all set on a slide table, and the slide table is slid on the slide of the machine table. on track. 14. The device for plugging PCB ink holes with a scraper according to claim 13, wherein a guide seat is provided at the bottom of the slide table, and a second adjusting screw is provided to adjust and guide the guide seat. 15. The device for plugging PCB ink holes with a scraper according to claim 4, wherein the driving member is a motor capable of rotating at a fixed angle. 16. The device for making PCB ink plug holes with a scraper according to claim 4, characterized in that: the driving member is a rotary pneumatic cylinder with fixed-angle rotation capability. 17. The device for plugging PCB ink holes with a scraper according to claim 4, characterized in that: the driving member directly drives the supporting shaft provided on the end plate on one side of the scraper seat, so that the angle of the scraper on the scraper seat is fixed. swing.

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