JP2010528863A - PP sheet dicing apparatus and method - Google Patents

Abstract

A PP sheet dicing apparatus capable of performing dicing and edge sealing at the same time and realizing automated production is provided.
The present invention relates to a dicing apparatus and method for a PP sheet (prepreg film), and the dicing apparatus includes a main mount having a PP sheet transmission mechanism, and a work table provided on the main mount. And a preparation mechanism provided on the upstream side of the work table, and a man-machine interface control system. The work table includes a laser and a dicing head for receiving a laser beam output from the laser and forming a dicing beam. With the above structure, an integrated PP sheet laser dicing device is provided, which not only avoids powder scattering and yarn scattering in the PP sheet dicing process, but also realizes automatic dicing and reduces production costs .
[Selection] Figure 3

Description

  The present invention relates to a dicing apparatus and method thereof, and more particularly, to a dicing apparatus for a PP sheet (prepreg film).

  The wiring board is configured in common with a plurality of layers of copper foil wires and an insulating carrier between the copper foil wires, and such a carrier is a PP sheet (prepreg film). In the process of manufacturing a wiring board, it is generally necessary to dice the PP sheet.

Referring to FIG. 1, the PP sheet is formed by combining glass fibers or other fibers 91 and a rubber material (for example, resin) 92. Currently, a PP sheet dicing method is mainly used in which a rolled PP sheet is left in a specialized apparatus, and a PP sheet is diced into a certain shape using a blade. In the dicing process, powder scattering (cutting powder) and yarn scattering (fiber yarn) occur at the position of the cut edge of the PP sheet.

Referring to FIG. 2, these powder scattering and yarn scattering are often sandwiched between wiring boards, resulting in an open joint between the wiring board layers. In the case of manufacturing a multi-layer wiring board, the connection between the wiring boards for each layer is performed by first drilling the wiring board and then electrically plating one layer of copper on the hole wall. A method of electrically connecting the copper foils of the upper and lower printed circuit boards through the layers is used. As shown in FIG. 2, when accurate, the copper foil 72 and the copper foil 73 are electrically connected to each other. However, due to the presence of open joints due to powder scattering and / or yarn scattering, the copper foil 71 and the copper foil In some cases, an electrical connection to 72 cannot be realized.

At present, as a method of solving powder scattering and yarn scattering, dicing PP sheets are stacked, first blown clean with an air pressure gun, and then a special infrared edge seal is used to heat the trim and edge seal To do. In the general process of dicing, powder scattering and thread scattering occur, so when blowing with a wind gun to clean, some relatively hidden places may not be blown, While blowing, dust may be dispersed in the air and newly deposited on the PP sheet, resulting in the result of contaminating the PP sheet twice. Even before the edge sealing, the powder can be blown off with a wind gun, but it may be peeled off at any time, and if the powder and / or yarn enters the sandwich of the wiring board, the wiring board may be disposed of. become. Furthermore, when performing edge sealing, there is a high demand for stacking wiring boards, and it is necessary to align the stacked sides. Otherwise, the edges that are pushed out will be burnt, but the edges that are shrunk on the inside will not burn, making it impossible to achieve the edge sealing requirement. Further, when PP sheets stacked using infrared rays are edge-sealed, the layers of the PP sheets can be easily bonded to each other, and the edge thickness does not become uniform when forcedly divided.

As can be seen, in the current method for solving powder scattering and yarn scattering, not only one apparatus is added, but also the operation process is complicated and the production cost is increased. As the accuracy, density, and number of layers of wiring boards improve, there is an increasing demand for solving the problem of powder scattering and yarn scattering.

In the present invention, when PP sheet in the prior art is diced with a blade, powder scattering and yarn scattering occur. Therefore, it is necessary to add a subsequent edge sealing step and an edge sealing device, and increase the production cost. In order to solve this technical problem, a PP sheet dicing apparatus capable of simultaneously performing dicing and edge sealing and realizing automated production is provided.

In the present invention, when PP sheet in the prior art is diced with a blade, powder scattering and yarn scattering occur. Therefore, it is necessary to add a subsequent edge sealing step and an edge sealing device, and increase the production cost. As a technical proposal to be used to solve the technical problem, a main mount having a PP sheet transmission mechanism, a work table provided on the main mount, a preparation mechanism provided on the upstream side of the work table, And a machine interface control system, the work table provides a PP sheet dicing apparatus including a laser and a dicing head for receiving a laser beam output from the laser and forming a dicing beam.

As a preferred embodiment according to the present invention, the charging mechanism adjusts the relaxation degree of the PP sheet, the charging shaft for supporting the material roll of the pre-cut PP sheet, the relay roller installed to change the transmission direction of the PP sheet, and the PP sheet. The relaxation adjustment mechanism includes a fixed shaft, a connecting rod rotating around the fixed shaft, and an activity shaft provided on the connecting rod.

As a preferred embodiment according to the present invention, the relaxation adjusting mechanism further includes a limit mechanism for limiting the rotation range of the connecting rod.

As a preferred embodiment according to the present invention, the main mount, the work table, and the charging mechanism are connected to form an integrated structure, and the dicing apparatus further includes a discharging mechanism that is movable with respect to the main mount.

As a preferred embodiment according to the present invention, the PP sheet transmission machine is a roller transmission mechanism provided on at least one side of the work table, and the roller transmission mechanism includes a main pressing roller, a passive pressing roller, a main pressing roller, and a passive pressing mechanism. The work table further includes a dicing head transmission mechanism that transmits the dicing head perpendicular to the transmission direction of the PP sheet transmission mechanism.

As a preferred embodiment according to the present invention, the workbench further includes an air compression device for generating a blown airflow, and the air compression device communicates with the dicing head, and the dicing head guides the blown airflow to the surface of the PP sheet. .

As a preferred embodiment according to the present invention, the workbench further includes a negative pressure type dust suction device.

As a preferred embodiment according to the present invention, the negative pressure type dust suction device is provided immediately below the dicing head, and has a slot-like dust suction port that matches the transmission direction of the dicing head.

As a preferred embodiment according to the present invention, the man-machine interface control system includes a man-machine interface, a controller connected to the man-machine interface, and a servo control system and a laser control system respectively connected to the controller.

As a preferred embodiment according to the present invention, the work table includes at least two dicing heads, and the at least two dicing heads are provided on the same straight line or a corresponding parallel straight line perpendicular to the transmission direction of the PP sheet transmission mechanism. ing.

In the present invention, when PP sheet in the prior art is diced with a blade, powder scattering and yarn scattering occur. Therefore, it is necessary to add a subsequent edge sealing step and an edge sealing device, and increase the production cost. Other technical proposals employed to solve the technical problem of: a. Providing a pre-cut PP sheet and adjusting the degree of relaxation; b. Transmitting the pre-cut PP sheet in a first direction; c. Dicing by guiding a laser beam to act on a pre-cut PP sheet; d.
A method of dicing a PP sheet, including a step of transmitting a laser beam in a second direction perpendicular to the first direction so as to obtain a slot-shaped dicing PP sheet.

As a preferred embodiment according to the present invention, in step b, dicing is performed by applying a plurality of laser beams to the precut PP sheet so as to realize a plurality of dicing of the precut PP sheet.

As a preferred embodiment according to the invention, the plurality of laser beams are obtained by means of a spectroscopic device or a plurality of corresponding lasers.

As a preferred embodiment according to the present invention, the dicing method further includes obtaining a dicing parameter via a man-machine interface.

According to the above structure and method, integrated PP sheet laser dicing apparatus and dicing method are provided, not only avoiding powder scattering and yarn scattering situation in PP sheet dicing process, but also realizing automatic dicing and production Costs are also reduced.

The figure which shows the structure of the conventional PP sheet. The figure which shows the structure of the circuit board which comprises PP sheet diced by the conventional system. The figure which shows the structure of one Example of the dicing apparatus of PP sheet | seat of this invention. The figure which shows the structure of the worktable of this invention. The elements on larger scale of I part in FIG. The figure which shows the structure of another Example of the dicing apparatus of PP sheet | seat of this invention. The block diagram which shows the man machine interface control system of this invention. The flowchart figure of the operation | work of the dicing apparatus of PP sheet | seat of this invention.

As shown in FIG. 3, the PP sheet dicing apparatus of the present invention includes a main mount 2, a work table 1 provided on the main mount 2, and a preparation mechanism 3 provided on the upstream side of the work table 1. I have. The work table 1, the main mount 2, and the preparation mechanism 3 are connected to form an integrated structure. The dicing apparatus further includes a man-machine interface control system so that automatic dicing of the PP sheet is realized by setting parameters by the user, controlling and coordinating the operation of each component.

The main mount 2 is provided with a PP sheet transmission mechanism. In this embodiment, the PP sheet transmission mechanism is a roller transmission mechanism provided on at least one side of the work table 1, and the roller transmission mechanism includes a main pressing roller 23, a passive pressing roller 22, and a main pressing roller 23. And a pressure adjusting mechanism 21 for adjusting a relative pressure between the pressure pressing roller 22 and the passive pressing roller 22. The main pressing roller 23 is connected to the servo motor via a belt or a similar transmission mechanism.

The work table 1 includes a laser 11 for generating a laser beam having an appropriate wavelength and energy density, a dicing head 12 for receiving a laser beam output from the laser 11 and forming a dicing beam, and transmission by a PP sheet transmission mechanism. And a dicing head transmission mechanism (not shown) for transmitting the dicing head 12 perpendicular to the direction. In this embodiment, the dicing head 12 can move linearly along a horizontal (or vertical) rail by driving a servo motor, thereby realizing dicing in the lateral direction of the PP sheet. In this embodiment, the laser 11 is preferably a laser having a wavelength of 9.4 μm using a CO ₂ laser.

The preparation mechanism 3 includes a preparation shaft 30 for supporting the pre-cut PP sheet material roll 4, an appropriate number of relay rollers 31 provided to change the PP sheet transmission direction, and a degree of relaxation of the PP sheet. And a relaxation adjusting mechanism 32. The relaxation adjusting mechanism 32 includes a fixed shaft 321 that is fixed in position, a connecting rod 322 that rotates around the fixed shaft 321, and an activity shaft 323 provided on the connecting rod 322. The preparation shaft 30 is adapted to control braking through a braking mechanism as appropriate. The relaxation adjusting mechanism 32 further includes a limit mechanism 324 that limits the rotation range of the connecting rod 322.
In the process of preparing the PP sheet, the PP sheet material roll 4 is first attached to the preparation shaft 30, and the PP sheet is transferred to the roller on the main mount 2 via the relay roller 31 on the preparation mechanism 3 and the active shaft 323 of the relaxation adjusting mechanism 32. By being transmitted to the mechanism, the timely supply of the PP sheet is secured.

The pressure adjusting mechanism 21 adjusts the pressure between the main pressing roller 23 and the passive pressing roller 22 so that a sufficient frictional force is generated between the main pressing roller 23, the passive pressing roller 22 and the PP sheet. The pressure between the main pressing roller 23 and the passive pressing roller 22 also limits the lateral vibration of the PP sheet so that stable feeding of the PP sheet by driving the main pressing roller 23 is realized. When the PP sheet reaches the dicing position of the work table 1 during transmission, the PP sheet is diced in the vertical direction by the dicing beam output from the dicing head 12. The cut PP sheet material falls onto the upper surface of the feeding mechanism (not shown). The feeding mechanism is movable with respect to the main mount 2 so that the cut PP sheet material can be easily carried out.

As further shown in FIGS. 4 and 5, a cavity 121 is provided in the dicing head 12, and a focusing element 122 is provided in the cavity 121, and the dicing head is configured to guide the mechanism appropriately or to input directly. The 12 laser beams are focused to the dicing position of the work table 1 via the focusing element 122, and the passing PP sheet is diced. A blowing pipe 123 is provided on the cavity 121 side of the dicing head 12, and the blowing pipe 123 is located between the focusing element 122 and the laser beam exit of the dicing head 12. The blower pipe 123 is in communication with an air compressor (not shown). The blown airflow generated by the air compressor is blown out through the blowout pipe 123 to the focal point of the laser beam of the dicing head 12, that is, the cut end of the PP sheet. The blowout pipe 123 is provided with an airflow adjustment valve 124 to adjust the size of the airflow. Since the blow-out pipe 123 is located between the focusing element 122 and the laser beam exit of the dicing head 12, the blown air flow generated by the air compressor blows into the cavity 121 of the dicing head 12 through the blow-out pipe 123. Thereafter, it can only flow to the position of the laser beam exit of the dicing head 12, and dust generated at the cut end of the PP sheet enters the cavity 121 of the dicing head 12 against the flow of the high-pressure air flow by the high-pressure action of the air flow. It is ensured that the focusing element 122 is not contaminated. Further, the air compression device may be provided at another position on the work table 1 by another appropriate method so that smoke or carbon black generated at the cut end is sprayed.

The work table 1 is further provided with a negative pressure type dust suction device 13. In this embodiment, the negative pressure type dust suction device 13 is provided with a slot-like dust suction port 131 that is provided directly below the dicing head 12 and coincides with the transmission direction of the dicing head. A dust suction tube 132 is provided on the opposite side of the dust suction port 131. During the dicing process, smoke and carbon black generated at the cut end of the PP sheet are sucked out from the dust suction port 131. Further, in the horizontal dicing process of the dicing head 12, the dust suction port 131 can fix the PP sheet to be diced at an appropriate position so that the position of the PP sheet does not change in the horizontal dicing process. Secure.

As shown in FIG. 6, the work table 1 is provided with at least two dicing heads 12. In this embodiment, the plurality of dicing heads 12 are provided on the same straight line perpendicular to the transmission direction of the PP sheet, and output from one laser via the spectroscopic mechanism or from each laser via the light guide mechanism. Multiple dicing of the PP sheet is realized by receiving the laser beam. However, the plurality of dicing heads 12 may be provided on different corresponding parallel straight lines perpendicular to the transmission direction of the PP sheet, and receive laser beams from the corresponding lasers. Such a structure has the advantage of avoiding the use of a higher power laser and a complicated spectroscopic mechanism, ensuring the dicing strength of each dicing head, and facilitating the horizontal dicing of different dicing heads.

When the PP sheet is diced into a rectangle, the position and pitch of the dicing head 12 can be arranged based on the width of the base material of the PP sheet and the required width of the PP sheet. By operating a plurality of dicing heads 12 simultaneously, high efficiency is ensured when dicing in large quantities.

When a dicing process is performed on a PP sheet using the dicing apparatus of the present invention, the cut end of the PP sheet is automatically sealed by the high temperature action of the laser beam, and powder scattering and yarn scattering at the cut end are completely avoided. . Further, since the laser beam is very thin and the energy is concentrated, the destruction around the cut edge of the PP sheet is very small.

In addition, since an air compression device is used, when dicing with a laser beam, the blown airflow generated by the device blows toward the cut end of the PP sheet. At the moment of leaving the beam, it can be rapidly cooled from a high temperature, and the process quenches and embrittles the glass yarn exposed to the outside. And the force generated by the air current can crack and peel the embrittled glass yarn so that the separating action is strengthened. Besides that, the air flow blows up the resin melted at the cut, prevents it from being newly joined after cooling, and prevents the PP sheet from being burnt in the laser beam and making the cut larger. it can.

When dicing with a laser beam, the dust suction device can inhale smoke and carbon black at the cut end, avoiding contamination of the PP sheet and not polluting the environment. Moreover, the negative pressure generated at the dust suction port can fix the PP sheet at the position of the dust suction port during the dicing process in the lateral direction, and can ensure that the position of the PP sheet does not change when dicing. The focal point of the laser beam is easily fixed at the dicing position of the PP sheet.

As shown in FIG. 7, FIG. 7 is a block diagram showing the man-machine interface control system of the present invention. The man machine interface control system in the PP sheet dicing apparatus of the present invention includes a man machine interface (HMI), a controller, a servo control system, and a laser control system. In this embodiment, the man-machine interface uses a touch panel, and the controller uses a programmable logic controller (PLC). The servo control system has various types of components depending on the on / off, rotation direction, rotation speed, and displacement amount of servo motors related to the control of servo amplifiers and pulse generators (eg, main-pressing roller servo motors, dicing head transmission servo motors). Can be realized. The laser control system transmits a control signal to the corresponding laser via the laser communication I / O plate, and can control on / off and power (energy control) of the laser. The laser control system may further include a laser cooling system. The man-machine interface control system may further include an alarm and an emergency stop control system.

FIG. 8 is a work flowchart of the PP sheet dicing apparatus of the present invention. In the dicing process, the user controls the entire dicing process through the man-machine interface control system, and first, when ensuring that no alarm signal is generated, various types of dicing parameters, e.g., The pitch of the dicing head 12 (the dicing width in the horizontal direction) and the dicing length in the vertical direction, the corresponding PP material number, the actual dicing speed, the speed of the roll material, the laser power, the laser operating temperature, etc. are set. Among them, parameters related to the laser are transmitted to the corresponding laser via the laser communication I / O plate, or directly to the laser cooling system. On the other hand, servo parameters relating to pitch, length, speed, etc. are given to the corresponding servo motor via a servo control system. When the PLC reset key is activated, the PLC is initially positioned at the start position of each dicing head according to the corresponding dicing parameter. Subsequently, after activating the PLC automatic dicing key, the PP sheet transmission mechanism propels the PP sheet, and at the same time, all the dicing heads 12 work together under the control of the program to complete the vertical dicing of the PP sheet. Thereafter, the transmission of the PP sheet transmission mechanism is stopped. All of the dicing heads 12 or a predetermined number of the dicing heads 12 move in the lateral direction by driving the dicing head transmission mechanism to complete the lateral dicing of the PP sheet, so that the PP sheet has a predetermined length and width. Dicing into slot-like material. It is reset after dicing is completed and it is repeated. In addition, the control system provides statistics on the accumulated work time of the laser, simply cuts once, reworks the laser, statistics on the work process time for each group, alarms for abnormal conditions such as water temperature, water pressure, pressure, servo, etc. Emergency stop control may be performed.

The above examples are illustrative of preferred embodiments of the invention and should not be construed as limiting. A person skilled in the art can devise various implementation methods according to different actual needs under the conditions that do not depart from the scope and spirit of the present invention. The number of constituent elements described in the specification and claims is not limited to one or plural unless otherwise specified.

Claims (14)

A main mount having a PP sheet transmission mechanism;
A workbench provided on the main mount;
With a man-machine interface control system,
The workbench is
Laser,
A dicing head for receiving a laser beam output from the laser and forming a dicing beam;
A PP sheet dicing apparatus comprising: a preparation mechanism provided upstream of the work table. The charging mechanism is
A preparation shaft for supporting the material roll of the pre-cut PP sheet;
A relay roller installed to change the transmission direction of the PP sheet;
A relaxation adjusting mechanism for adjusting the degree of relaxation of the PP sheet, wherein the relaxation adjusting mechanism includes a fixed shaft, a connecting rod rotating around the fixed shaft, and an activity shaft provided on the connecting rod. The dicing apparatus according to claim 1, further comprising: The dicing apparatus according to claim 2, wherein the relaxation adjusting mechanism further includes a limit mechanism that limits a rotation range of the connecting rod. The main mount, the work table, and the preparation mechanism are connected to form an integrated structure, and the dicing apparatus further includes a supply mechanism that is movable with respect to the main mount. The dicing apparatus according to 1, 2, or 3. The PP sheet transmission machine is a roller transmission mechanism provided on at least one side of the work table, and the roller transmission mechanism includes a main pressing roller, a passive pressing roller, the main pressing roller, and the passive pressing roller. A pressure adjusting mechanism for adjusting a relative pressure between the dicing head and the work table further including a dicing head transmission mechanism that transmits the dicing head perpendicular to a transmission direction of the PP sheet transmission mechanism. The dicing apparatus according to claim 1. The work table further includes an air compression device for generating a blown airflow, and the air compression device communicates with the dicing head, and the dicing head guides the blown airflow to the surface of the PP sheet. The dicing apparatus according to claim 5. The dicing apparatus according to claim 5, wherein the work table further includes a negative pressure type dust suction device. The dicing apparatus according to claim 7, wherein the negative pressure type dust suction device is provided immediately below the dicing head and includes a slot-like dust suction port that matches a transmission direction of the dicing head. The man-machine interface control system includes a man-machine interface, a controller connected to the man-machine interface, and a servo control system and a laser control system connected to the controller, respectively. Item 2. The dicing apparatus according to Item 1. The work table includes at least two dicing heads, and the at least two dicing heads are provided on the same straight line or a corresponding parallel straight line perpendicular to the transmission direction of the PP sheet transmission mechanism. The dicing apparatus according to claim 1. A method of dicing a PP sheet,
a. providing a pre-cut PP sheet and adjusting the degree of relaxation;
b. transmitting the pre-cut PP sheet in a first direction;
c. dicing by guiding a laser beam to act on the pre-cut PP sheet;
d. Transmitting a laser beam in a second direction perpendicular to the first direction so as to obtain a slot-shaped dicing PP sheet. The dicing method according to claim 11, wherein in step b, dicing is performed by causing a plurality of laser beams to act on the precut PP sheet so that a plurality of dicing of the precut PP sheet is realized. The dicing method according to claim 12, wherein the plurality of laser beams are obtained by a spectroscopic device or a plurality of corresponding lasers. 12. The dicing method according to claim 11, further comprising the step of acquiring dicing parameters via a man-machine interface.

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