CN110139486B

CN110139486B - Continuous production method of flexible circuit board

Info

Publication number: CN110139486B
Application number: CN201910399190.1A
Authority: CN
Inventors: 罗绍静; 卢欣欣; 赖弥勇
Original assignee: Guangdong Shunde Siry Technology Co ltd
Current assignee: Guangdong Shunde Siry Technology Co ltd
Priority date: 2019-05-14
Filing date: 2019-05-14
Publication date: 2022-09-16
Anticipated expiration: 2039-05-14
Also published as: CN110139486A

Abstract

The invention discloses a continuous production method of a flexible circuit board, which belongs to the technical field of flexible circuit boards and comprises an insulating layer and a metal layer, wherein the flexible circuit board is cut by a knife roll and supported or pulled by a sliding rod, and discontinuous waste formed by cutting the insulating layer and/or the metal layer is stripped and taken away by a waste discharge film dynamically wound on the sliding rod or attached to the back of the insulating layer or the metal layer. The waste discharge film is used for continuously stripping the discontinuous waste formed by cutting, the waste discharge film is a film with one side having tackiness, the side having tackiness of the waste discharge film is firstly adhered to the cut metal layer or insulating layer and then torn off from the cut metal layer or insulating layer during cutting or after cutting, and the discontinuous waste formed by cutting is continuously stripped along with the waste discharge film due to the tackiness when the waste discharge film is separated from the metal layer or insulating layer, so that a great obstacle is solved for realizing the continuous production of the flexible circuit board.

Description

Continuous production method of flexible circuit board

Technical Field

The invention relates to the technical field of flexible circuit boards, in particular to a continuous production method of a flexible circuit board.

Background

The flexible printed circuit board is called as a 'soft board' in short, is commonly called as FPC in the industry, is a printed circuit board made of flexible insulating base materials, and has the advantages that many rigid printed circuit boards do not have. For example it may be freely bent, folded, etc. The flexible circuit board can greatly reduce the volume of the electronic product, and is suitable for the development of the electronic product towards high density, miniaturization and high reliability. Therefore, the flexible circuit board is widely applied to the fields or products of aerospace, military, mobile communication, laptop computers, computer peripherals, PDAs, digital cameras and the like.

The lamp strip is a relatively hot field for flexible circuit board applications. The lamp strip is characterized in that the LED lamp is welded on the flexible circuit board through a special processing technology and then is connected with a power supply to emit light, and the lamp strip has the advantages of long service life, energy conservation, environmental protection and the like. With the continuous improvement of living standard of people, the LED lamp strip is widely applied to decorative lighting places, such as neon lamps, large-scale antenna circuit boards, caption advertisements, signboards, ceiling lighting and the like.

The flexible circuit boards used in the prior art for making the light strips generally include single-layer boards and double-layer boards. The single-layer board is a flexible circuit board with a metal layer, and comprises a first insulating layer, the metal layer and a second insulating layer which are sequentially stacked, wherein except that the metal layer is cut into a designed circuit structure, in order to connect components such as lamp beads, resistors and the like, the first insulating layer is required to be provided with component holes for electrically connecting the components and the metal layer; double-deck board, the flexible line way board who has two-layer metal level promptly, including the first insulation layer that stacks gradually, first metal level, the second insulating layer, second metal level and third insulating layer, except that the metal level will be tailor into the circuit structure who designs, in order to connect lamp pearl, components and parts such as resistance, need be equipped with on the first insulation layer and supply components and parts hole that the metal level realizes the electricity to be connected, for first metal level and the second metal level of UNICOM, need set up the antithetical couplet through-hole that supplies first metal level and second metal level to realize the electricity to be connected on first metal level and the second insulating layer.

In order to realize the continuous production of the flexible circuit board in the prior art, the circuit is designed into a structure that the waste materials can be connected into a whole so as to be convenient for stripping, and the method can be adopted for circuit cutting, but the cutting of component holes, connecting through holes and the like can generate the waste materials (namely discontinuous waste materials) which cannot be connected into a whole, so that the realization of the continuous production of the flexible circuit board is seriously hindered.

In addition, in the prior art, in order to ensure the smooth production process of the flexible circuit board, the depth of the cutting edge of the cutting knife must be strictly controlled to be consistent with the thickness of the cut metal layer and/or insulation layer, the too shallow cutting edge can cause the incomplete cutting of the cut metal layer and/or insulation layer to further influence the smooth stripping of waste materials, and the too deep cutting edge is difficult to ensure the service life of the equipment.

Therefore, there is a need for an improved method for producing a flexible printed circuit board.

Disclosure of Invention

In view of the above, the present invention provides a continuous production method for a flexible printed circuit board to overcome at least one of the above disadvantages of the prior art, and solves the problems that the discontinuous waste material is difficult to continuously strip and the requirement for the precision of the knife edge depth is high.

In order to solve the technical problems, the invention adopts the following technical scheme:

a continuous production method of a flexible circuit board comprises an insulating layer and a metal layer, wherein the flexible circuit board is cut by a knife roll, supported or pulled by a sliding rod, and a non-continuous waste formed by cutting the insulating layer and/or the metal layer is stripped and taken away by a waste discharge film dynamically wound on the sliding rod or attached to the back of the insulating layer or the metal layer.

The waste discharge film is used for continuously stripping the discontinuous waste formed by cutting, the waste discharge film is a film with one side having tackiness, the side having tackiness of the waste discharge film is firstly adhered to the cut metal layer or insulating layer and then torn off from the cut metal layer or insulating layer during cutting or after cutting, and the discontinuous waste formed by cutting is continuously stripped along with the waste discharge film due to the tackiness when the waste discharge film is separated from the metal layer or insulating layer, so that a great obstacle is solved for realizing the continuous production of the flexible circuit board.

The knife roll and the sliding stick which plays a supporting role are arranged in parallel to form a group of cutting rolls, when the knife roll cuts all the insulation layers and/or metal layers which pass through the cutting rolls, the waste discharge film which is dynamically wound on the sliding stick is peeled off to take away discontinuous waste materials formed during cutting, or the waste discharge film which is attached to the insulation layer or the metal layer which is closest to the sliding stick is peeled off to take away the discontinuous waste materials formed during cutting. The rotor cuts the cutting that belongs to the penetrability to all insulating layers and/or metal level that pass through, can contact the slide roll for guaranteeing to be difficult to avoid by the edge of a knife on the effective cutting rotor on the cutting layer promptly, under this condition, the membrane of wasting discharge developments is around locating on the slide roll or attached in advance on first insulating layer again together pass the second cutting rotor, when the second cutting rotor cuts, the membrane of wasting discharge can also play the effect of bed hedgehopping sword, avoid the edge of a knife on the rotor directly to collide with and cause mechanical damage between them on touchhing up the slide roll, be favorable to improve equipment's life, more importantly, the required precision greatly reduced to the edge of a knife degree of depth.

The knife edge depth on the knife roller is more than or equal to the sum of the thicknesses of all the insulation layers and/or metal layers to be cut and less than the sum of the thicknesses of all the insulation layers and/or metal layers to be cut and the thickness of the waste discharge film.

Preferably, the knife edge depth on the knife roller is greater than the sum of the thicknesses of all the insulation layers and/or metal layers to be cut and less than the sum of the thicknesses of all the insulation layers and/or metal layers to be cut and the thickness of the waste film.

More preferably, the knife edge depth on the knife roller is 0.01-0.65 μm larger than the sum of the thicknesses of all the insulation layers and/or metal layers to be cut.

The knife roll and the sliding roller which plays a role in traction are arranged on the same side of the cut insulating layer and/or the cut metal layer at a distance in parallel, and after the knife roll cuts part of the passing insulating layer and/or the passing metal layer, the knife roll dynamically winds the waste discharge film arranged on the sliding roller to carry away discontinuous waste materials formed after cutting. The knife roll cuts the part of the insulating layer and/or the metal layer passing through, belonging to non-penetrating cutting, in this case, the non-continuous waste material must be stripped from the cut metal layer and/or the insulating layer from the side of the knife roll after the knife roll finishes cutting, a traction sliding roll which is parallel to the knife roll is arranged on the side of the knife roll, and a waste film is dynamically wound on the sliding roll, so that the continuous stripping of the non-continuous waste material in the situation can be realized.

The knife edge depth on the knife roller is more than or equal to the sum of the thicknesses of all the insulation layers and/or metal layers to be cut and less than the sum of the thicknesses of all the insulation layers and/or metal layers to be cut and the thickness of the next insulation layer or metal layer not to be cut.

The rotor and the sliding rod parallel arrangement who plays supporting role form a set of cutting roller, and when the rotor was cut all insulating layers and/or metal level that pass through, the last developments of rotor were around being equipped with the shim film, avoided the edge of a knife on the rotor directly to collide with and run into and cause mechanical damage between them on the rotor, was favorable to improve equipment's life, more importantly, to the required greatly reduced of precision of edge of a knife degree of depth.

The knife edge depth on the knife roller is more than or equal to the sum of the thicknesses of all the insulation layers and/or metal layers to be cut and is less than the sum of the thicknesses of all the insulation layers and/or metal layers to be cut and the thickness of the knife cushion film.

Preferably, the knife edge depth on the knife roller is 0.01-0.65 μm larger than the sum of the thicknesses of all the insulation layers and/or metal layers to be cut.

Compared with the prior art, the invention has the following beneficial effects: the waste discharge film is used for continuously stripping the discontinuous waste formed by cutting, the waste discharge film is a film with one side having tackiness, the side having tackiness of the waste discharge film is firstly adhered to the cut metal layer or insulating layer and then torn off from the cut metal layer or insulating layer during cutting or after cutting, and the discontinuous waste formed by cutting is continuously stripped along with the waste discharge film due to the tackiness when the waste discharge film is separated from the metal layer or insulating layer, so that a great obstacle is solved for realizing the continuous production of the flexible circuit board.

Drawings

Fig. 1 is a first schematic diagram of embodiment 1.

FIG. 2 is a second schematic diagram of example 1.

FIG. 3 is a schematic view of example 2.

FIG. 4 is a schematic view of example 3.

Description of reference numerals: knife roll C, slide roll D, waste film 100, shim film 200, metal layer/insulation layer 300, discontinuous waste 310.

Detailed Description

The drawings are for illustration purposes only and are not to be construed as limiting the invention; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted; the positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the invention. The present invention will be described in further detail with reference to specific examples.

A continuous production method of a flexible circuit board comprises an insulating layer and a metal layer, wherein the flexible circuit board is cut by a knife roller C, supported or pulled by a sliding rod, and a waste discharge film 100 which is dynamically wound on the sliding rod or attached to the back of the insulating layer or the metal layer is used for stripping and taking away discontinuous waste materials 310 formed by cutting the insulating layer and/or the metal layer.

According to the invention, the waste discharge film 100 is used for continuously stripping the discontinuous waste 310 formed by cutting, the waste discharge film 100 is a film with one side having tackiness, the side having tackiness of the waste discharge film 100 is firstly adhered to a metal layer or an insulating layer to be cut and then torn off from the metal layer or the insulating layer to be cut when cutting or after cutting, and the discontinuous waste 310 formed by cutting is continuously stripped along with the waste discharge film 100 due to the tackiness when leaving the metal layer or the insulating layer, so that a great obstacle is solved for realizing the continuous production of the flexible circuit board.

Example 1

As shown in fig. 1-2, the knife roll C and the sliding roller for supporting are arranged in parallel to form a set of cutting rolls, when the knife roll C cuts all the passing insulating layers and/or metal layers, the waste discharge film 100 dynamically wound around the sliding roller is peeled off to take away the non-continuous waste 310 formed during cutting, or the waste discharge film 100 attached to the insulating layer or metal layer closest to the sliding roller is peeled off to take away the non-continuous waste 310 formed during cutting. The cutting that the rotor C is to all insulating layers and/or the metal level that pass through cut and belong to the cutting of penetrability, can contact the slide roll D for guaranteeing to be difficult to avoid by the edge of a knife on the effective cutting rotor C in cutting layer promptly, under this condition, it passes the second cutting roller together again to arrange useless membrane 100 developments around locating on the slide roll D or attached in advance on the first insulating layer, when the second cutting roller cuts, it can also play the effect of backing knife to arrange useless membrane 100, avoid the edge of a knife on the rotor C directly to collide with and lead to the fact mechanical damage between them on the slide roll D, be favorable to improve equipment's life, more importantly, the required precision greatly reduced to the edge of a knife degree of depth.

The knife edge depth on the knife roller C is more than or equal to the sum of the thicknesses of all the insulation layers and/or metal layers to be cut and less than the sum of the thicknesses of all the insulation layers and/or metal layers to be cut and the thickness of the waste discharge film 100.

Preferably, the knife edge depth on the knife roller C is greater than the sum of the thicknesses of all the insulation layers and/or metal layers to be cut and less than the sum of the thicknesses of all the insulation layers and/or metal layers to be cut and the thickness of the waste film 100.

More preferably, the knife edge depth on the knife roller C is 0.01-0.65 μm larger than the sum of the thicknesses of all the insulation layers and/or metal layers to be cut.

Example 2

As shown in fig. 3, the knife roll C is arranged on the same side of the insulation layer and/or metal layer to be cut at a distance from the sliding roller for traction, and after the knife roll C cuts part of the insulation layer and/or metal layer passing through, the discontinuous waste material 310 formed after cutting is taken away by dynamically winding the waste film 100 arranged on the sliding roller. The knife roll C cuts the part of the insulating layer and/or the metal layer which passes through the knife roll C, and belongs to non-penetrating cutting, in this case, the non-continuous waste 310 must be stripped from the cut metal layer and/or the insulating layer from the side of the knife roll C after the knife roll C finishes cutting, a sliding roll D which is parallel to the knife roll C and has a traction function is arranged on the side of the knife roll C, and the waste discharge film 100 is dynamically wound on the sliding roll D, so that the continuous stripping of the non-continuous waste 310 can be realized in the situation.

The knife edge depth on the knife roller C is more than or equal to the sum of the thicknesses of all the insulation layers and/or metal layers to be cut and less than the sum of the thicknesses of all the insulation layers and/or metal layers to be cut and the thickness of the next insulation layer or metal layer not to be cut.

Example 3

As shown in fig. 4, the knife roll C and the sliding roll for supporting form a set of cutting roll, when the knife roll C cuts all the passing insulating layers and/or metal layers, the sliding roll D is dynamically wound with the knife pad 200, so that the knife edge on the knife roll C is prevented from directly colliding with the sliding roll D to cause mechanical damage to the sliding roll D, the service life of the device is prolonged, and more importantly, the precision requirement for the depth of the knife edge is greatly reduced.

The knife edge depth on the knife roller C is more than or equal to the sum of the thicknesses of all the insulation layers and/or metal layers to be cut and less than the sum of the thicknesses of all the insulation layers and/or metal layers to be cut and the thickness of the knife cushion film 200.

Preferably, the knife edge depth on the knife roller C is 0.01-0.65 μm larger than the sum of the thicknesses of all the insulation layers and/or metal layers to be cut.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A continuous production method of a flexible circuit board, the flexible circuit board comprises an insulating layer and a metal layer, is cut by a knife roll, is supported by a slide roll with a supporting function, is dragged by the slide roll with a dragging function, and is characterized in that,

the knife roll and the supporting sliding roll are arranged in parallel to form a group of cutting rolls, the knife roll cuts all the insulation layers and the metal layers passing through, and simultaneously, the waste discharge film dynamically wound on the supporting sliding roll peels off and takes away the discontinuous waste materials formed in cutting, or the waste discharge film attached to the insulation layer or the metal layer closest to the supporting sliding roll peels off and takes away the discontinuous waste materials formed in cutting;

the knife roll and the sliding roll which plays a role in traction are arranged on the same side of the cut insulating layer and/or the cut metal layer at a distance in parallel, and after the knife roll cuts part of the insulating layer and/or the metal layer which passes through the knife roll, the waste discharge film arranged on the sliding roll which plays a role in traction is dynamically wound to carry away discontinuous waste materials formed after cutting; the knife edge depth on the knife roll is 0.01-0.65 mu m larger than the sum of the thicknesses of all the insulation layers and/or the metal layers to be cut.