CN106658970A - Processing method for removing burrs from flexible printed circuit board region of rigid-flexible printed circuit board - Google Patents

Abstract

The invention relates to a processing method for removing burrs in the soft board area of a rigid-flexible combined board, which includes expanding a certain size to the waste area along the two sides of the soft board in the non-link position of the flexible area, and using a forming gong knife to move the knife; after removing the cover, Laser cutting is used to remove the outer expansion part along the contour line of the flexible board at the non-link position of the flexible area. In the present invention, the forming gong knife is used in advance to expand a certain size to the waste area along the two sides of the flexible board at the non-linkage position of the flexible area. The outline of the flexible board at the link position is removed, and the burrs on the edge of the flexible board are also removed together, without manual repairs, maintaining the high precision of the outer dimensions of the flexible board, and solving the problem of burrs on both sides of the flexible board , to achieve the effect of low cost and no waste of materials.

Description

A processing method for removing burrs in the soft board area of rigid-flex board

technical field

The invention relates to the technical field of rigid-flexible board manufacturing, and more specifically refers to a processing method for removing burrs in the soft board area of a rigid-flexible board.

Background technique

In the printed circuit board industry, the current manufacturing method of the flexible area of the rigid-flex board is shown in Figure 1. The unbonded rigid board is removed to create a flexible area.

The two sides of the flexible board in the non-link position of the flexible area need to be broken by a milling cutter. Since the flexible board is made of PI material, the material is soft and has no support, the milling cutter will be entangled during milling, and the chip removal will not be smooth, resulting in poor cutting of the blade. Smooth, pulling the base material of the soft board, burrs appear on both sides of the soft board.

Chinese patent 201510985046.8 discloses a method for reducing burrs in the process of rigid-flex board gongs and rigid-flex boards. The method includes the steps of: pasting a layer of polyester film on the surface of the flexible board of the rigid-flex board; using the gong board method For forming, use a gong knife when making the gong board, and tear off the polyester film after the gong board is completed. By pasting the polyester film on the surface of the flexible board first, and then using the gong board method to form, the production efficiency can be improved, the cost can be reduced, and the product will not be delaminated, oil-broken or burr-produced, and the product yield rate will be improved.

In the above-mentioned patent, a layer of polyester film is pasted on the surface of the flexible board of the rigid-flex board, and the material of the polyester film will be wasted when the gong board is formed.

Therefore, it is necessary to design a processing method for removing the burrs in the soft board area of the rigid-flex board, so as to solve the problem of the burrs on both sides of the soft board in the flexible area, maintain the high precision of the outer dimensions of the soft board, and achieve low cost and no waste of materials. Effect.

Contents of the invention

The purpose of the present invention is to overcome the defects of the prior art and provide a processing method for removing burrs in the soft board area of a rigid-flex board.

In order to achieve the above object, the present invention adopts the following technical solution: a processing method for removing burrs in the soft board area of a rigid-flex board, the method comprising:

Expand a certain size to the waste area along the two sides of the soft board at the non-link position in the flexible area, and use the forming gong knife to cut;

After the cover is uncovered, laser cutting is used to remove the expanded part along the contour line of the soft board at the non-link position of the flexible area.

Its further technical solution is: the step of expanding the two sides of the soft board along the non-linkage position of the flexible area to a certain size toward the waste area, and adopting a forming gong knife to cut the knife, including the following specific steps:

At the rigid-flexible joint position, the forming gong cutter extends 0.4mm to 0.6mm into the soft board area of the non-linkage position in the flexible zone in the vertical direction along the contour line of the soft board at the non-linkage position in the flexible zone;

The forming gong knife turns and moves along the two sides of the soft board at the non-link position of the flexible area to the waste area.

Its further technical solution is: in the step of expanding the knife along the two sides of the soft board at the non-linkage position of the flexible zone to the waste area, specifically along the two sides of the soft board at the non-linkage position in the flexible zone The waste area is expanded by 0.3mm to 0.5mm.

Its further technical solution is: in the step of expanding the knife along the two sides of the soft board at the non-linkage position of the flexible zone to the waste area, specifically along the two sides of the soft board at the non-linkage position in the flexible zone The waste area is expanded by 0.4mm and the tool is moved.

Its further technical solution is: after the cover is uncovered, laser cutting is used along the contour line of the soft board at the non-linkage position of the flexible area, and in the step of removing the expanded part, the beginning of the cutting line of the laser cutting is provided with an undercut horn.

Its further technical solution is: the beginning of the cutting line of the laser cutting is arranged in an arc shape, and the arc length is 0.8 mm to 1 mm.

Its further technical solution is: the beginning of the cutting line of the laser cutting coincides with the cutting line of the forming gong knife by 0.2 mm to 0.4 mm.

Its further technical solution is: the beginning of the cutting line of the laser cutting coincides with the cutting line of the forming gong knife by 0.3mm.

Its further technical solution is: the length of the undercut angle at the beginning of the cutting line of the laser cutting is 0.8 mm to 1.2 mm.

Its further technical solution is: the starting point of the undercut angle at the beginning of the cutting line of the laser cutting is 0.1 mm to 0.3 mm away from the hard board area.

The beneficial effect of the present invention compared with the prior art is: a method of the present invention to solve the deburring of the flexible board of the rigid-flexible board. After the waste area is expanded to a certain size for cutting, the cover is uncovered, and then laser cutting is used to remove the expanded part along the outline of the flexible board at the non-link position. At the same time, the edge burrs of the flexible board are also And cut off, without manual repair, maintain the high precision of the outer dimension of the soft board, solve the problem of burrs on both sides of the soft board in the flexible area, achieve the effect of low cost and no waste of materials.

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is the schematic diagram of the production state of the existing rigid-flex board;

Fig. 2 is a schematic structural diagram of a processing method for removing burrs in the soft board area of a rigid-flex board provided by a specific embodiment of the present invention;

Fig. 3 is a flow chart of a processing method for removing burrs in the soft board area of a rigid-flex board provided by a specific embodiment of the present invention.

detailed description

In order to fully understand the technical content of the present invention, the technical solutions of the present invention will be further introduced and illustrated below in conjunction with specific examples, but not limited thereto.

As shown in the specific embodiments in Figures 2 to 3, this embodiment provides a processing method for removing burrs in the soft area of the rigid-flex board, which can be used in the production process of the rigid-flex board to solve the problem of soft areas in the flexible area. The problem of burrs on both sides of the board, the high precision of the shape and size of the flexible board, low cost, and no waste of materials.

As shown in Figure 3, a processing method for removing burrs in the soft board area of a rigid-flex board, the method includes:

S1. Expand a certain size to the waste area along the two sides of the soft board at the non-link position in the flexible area, and use a forming gong knife to cut;

S2. After removing the cover, use laser cutting to remove the expanded part along the contour line of the soft board at the non-link position in the flexible area.

As shown in Figure 2, the dotted line in the figure is the cutting line of the forming gong knife, that is, the cutting line of the forming gong knife; the solid line is the cutting line of laser cutting.

For the above S1 step, the forming gong knife is used to cut the two sides of the soft board along the non-linkage of the flexible area to a certain size outside the waste area, which can quickly cut thicker waste materials and at the same time provide Prepare for laser cutting in the subsequent S2 step.

In the above S2 step, after the cover is uncovered, laser cutting is used along the contour line of the flexible board at the non-link position to remove the expanded part. Here, the waste must first be uncovered to ensure that the thickness during cutting is Within the range of cutting depth allowed by laser cutting, incomplete cutting can be avoided. Using laser to cut along the contour line of the soft board in the non-link position of the flexible area can keep the prototype of the outer dimension of the soft board, making the soft board The dimensional accuracy of the shape is high.

After the forming knife is completed, the laser cutting method is used to cut along the outline line of the soft board in the non-link position of the flexible area, and the burr on the edge of the soft board is also cut off, without manual repair, and the outer dimension of the soft board High precision.

For the above S2 step, expand a certain size to the waste area along the two sides of the soft board at the non-link position in the flexible area, and use the forming gong knife to cut the step, including the following specific steps:

At the rigid-flexible joint position, the forming gong cutter extends 0.4mm to 0.6mm into the soft board area of the non-linkage position in the flexible zone in the vertical direction along the contour line of the soft board at the non-linkage position in the flexible zone;

The forming gong knife turns and moves along the two sides of the soft board at the non-link position of the flexible area to the waste area.

Specifically, 0.4mm to 0.6mm of cutting is performed in the flexible board area extending into the non-linkage of the flexible area in the vertical direction, in order to facilitate the cutting of the forming gong and maintain the smooth appearance.

In the step of expanding the knife along the two sides of the soft board at the non-linkage position in the flexible area to the waste area, specifically, expand 0.3mm to 0.5mm along the two sides of the soft board at the non-linkage area in the flexible area. mm cutting, here is to facilitate subsequent laser cutting to remove burrs.

Preferably, after the forming gong knife turns, move the knife along the two sides of the soft board at the non-link position of the flexible zone to expand 0.4mm outward to the waste area.

Of course, in other embodiments, after the above-mentioned forming gong knife is turned, it moves along the two sides of the flexible board at the non-linkage position of the flexible zone to any value between 0.3mm and 0.5mm outwardly from the waste zone.

Preferably, at the above-mentioned rigid-flexible joint position, the forming gong cutter moves 0.4 mm to 0.6 mm into the soft board area of the non-linked position in the flexible zone in the vertical direction along the contour line of the soft board at the non-linked position in the flexible zone. The step of mm, specifically, is to extend the knife 0.5mm into the soft board area of the non-link position of the flexible area in the vertical direction, the purpose is to facilitate the cutting and keep the appearance flat.

Of course, in other embodiments, the above-mentioned cutting length extending into the flexible board area of the non-link position of the flexible area in the vertical direction may also be any value between 0.4 mm and 0.6 mm.

For the above S2 step, after removing the cover, laser cutting is used along the contour line of the soft board at the non-linkage position of the flexible area, and in the step of removing the expanded part, the beginning of the cutting line of the laser cutting is provided with an undercut angle. The undercut angle is set so that the waste area is completely separated from the soft board, avoiding the situation where the edge part is bonded.

Furthermore, the starting end of the cutting line of laser cutting is arranged in an arc shape, and the arc length is 0.8 mm to 1 mm. This can facilitate the cutting of the laser cutting tool, and also facilitate the finishing of the laser cutting.

Specifically, the beginning of the cutting line of the laser cutting coincides with the cutting line of the forming gong knife by 0.2 mm to 0.4 mm. Here is specifically the overlap of the cutting line of the laser cutting and the cutting line of the forming gong knife in the area close to the hard board. This is to keep the edge of the soft board smooth and flat, and to avoid separation between the laser cutting and the cutting of the forming gong knife. layer phenomenon.

Preferably, the beginning of the cutting line of the laser cutting coincides with the cutting line of the forming gong knife by 0.3 mm. Of course, in other embodiments, the length of the overlapping of the beginning of the cutting line of the laser cutting and the cutting line of the forming gong knife can also be 0.2 mm to Any value from 0.4mm.

Furthermore, the length of the undercut angle at the beginning of the laser cutting line is 0.8 mm to 1.2 mm.

Preferably, the length of the undercut at the beginning of the laser cutting line is 1.0 mm; of course, in other embodiments, the length of the undercut at the beginning of the laser cutting line can be between 0.8 mm and 1.2 mm any value in between.

In addition, the starting point of the undercut angle at the beginning of the cutting line of the above-mentioned laser cutting is 0.1mm to 0.3mm away from the hard plate area, so as to avoid damage caused by laser cutting to the hard plate area, and also prevent the surrounding area of laser cutting from being damaged. The heat can cause damage to hard board areas.

Preferably, the starting point of the undercut angle at the beginning of the cutting line of laser cutting is 0.2mm away from the hard plate area.

Of course, in other embodiments, the distance from the starting point of the undercut angle at the beginning of the laser cutting line to the hard plate area can be any value between 0.1 mm and 0.3 mm.

The above-mentioned laser cutting and the cutting of the formed gong knife are all cut perpendicular to the longitudinal direction of the steel-flexible bonded plate.

The above-mentioned method to solve the deburring of rigid-flexible boards and soft boards is to use a forming gong in advance to expand the waste area to a certain size along the two sides of the soft board at the non-link position in the flexible area. Cover treatment, and then use laser cutting to remove the expanded part along the outline of the soft board at the non-link position in the flexible area. At the same time, the edge burrs of the soft board are also removed together, without manual repair, and the outer dimensions of the soft board are maintained. High precision, solves the problem of burrs on both sides of the flexible board in the flexible area, and achieves the effect of low cost and no waste of materials.

The above only uses examples to further illustrate the technical content of the present invention, so that readers can understand more easily, but it does not mean that the implementation of the present invention is limited to this, and any technical extension or re-creation done according to the present invention is subject to the present invention. protection of. The protection scope of the present invention shall be determined by the claims.

Claims (10)

1. a kind of processing method for removing rigid-flex combined board flexible board area burr, it is characterised in that methods described includes：

The lateral garbage area of soft board two along the non-link bit in flexible region extends out certain size, using shaping gong knife feed；

After taking off lid, along the trim line of the soft board of the non-link bit in flexible region, using laser cutting, flared portions are removed.

2. a kind of processing method for removing rigid-flex combined board flexible board area burr according to claim 1, it is characterised in that institute State the lateral garbage area of soft board two along the non-link bit in flexible region and extend out certain size, using the step of shaping gong knife feed, including Step in detail below：

In the position of rigid-flexible combination, shaping gong knife is stretched in vertical direction and scratched along the trim line of the soft board of the non-link bit in flexible region The soft board region feed 0.4mm to 0.6mm of the non-link bit in property area；

The lateral garbage area of soft board two that shaping gong knife turns round along the non-link bit in flexible region extends out feed.

3. a kind of processing method for removing rigid-flex combined board flexible board area burr according to claim 2, it is characterised in that institute State shaping gong knife turn round along the lateral garbage area of soft board two of the non-link bit in flexible region extend out feed the step of in, specifically along flexible The lateral garbage area of soft board two of the non-link bit in area extends out 0.3mm to 0.5mm feeds.

4. a kind of processing method for removing rigid-flex combined board flexible board area burr according to claim 3, it is characterised in that institute State shaping gong knife turn round along the lateral garbage area of soft board two of the non-link bit in flexible region extend out feed the step of in, specifically along flexible The lateral garbage area of soft board two of the non-link bit in area extends out 0.4mm feeds.

5. the processing method of a kind of removal rigid-flex combined board flexible board area burr according to any one of Claims 1-4, it is special Levy and be, it is described to take off after lid, along the trim line of the soft board of the non-link bit in flexible region, using laser cutting, remove flared portions In step, the line of cut top of the laser cutting is provided with overhead kick angle.

6. a kind of processing method for removing rigid-flex combined board flexible board area burr according to claim 5, it is characterised in that institute The line of cut top for stating laser cutting arranges that arc length is 0.8mm to 1mm in arc shaped.

7. a kind of processing method for removing rigid-flex combined board flexible board area burr according to claim 6, it is characterised in that institute The line of cut at the line of cut top and the shaping gong knife of stating laser cutting overlaps 0.2mm to 0.4mm.

8. a kind of processing method for removing rigid-flex combined board flexible board area burr according to claim 7, it is characterised in that institute The line of cut at the line of cut top and the shaping gong knife of stating laser cutting overlaps 0.3mm.

9. a kind of processing method for removing rigid-flex combined board flexible board area burr according to claim 8, it is characterised in that institute The length for stating the overhead kick angle at the line of cut top of laser cutting is 0.8mm to 1.2mm.

10. a kind of processing method for removing rigid-flex combined board flexible board area burr according to claim 9, it is characterised in that The starting point at the overhead kick angle at the line of cut top of the laser cutting is apart from the hardboard region 0.1mm to 0.3mm.