JPH0473147A - Apparatus for manufacturing laminated sheet - Google Patents

Abstract

PURPOSE:To obtain a laminated sheet having good surface quality by mounting a plurality of grinding brushes removing the foreign matter such as the resin bonded to the surfaces of belts and dust collectors sucking and removing the foreign matter shaven off by the grinding brushes. CONSTITUTION:When a laminate 3 wherein metal foils 2 are superposed on both surfaces of a prepreg 1 is passed between upper and lower high frequency applying electrodes 8 and the prepreg 1 is subjected to dielectric heating to melt a resin, the molten resin flows laterally to be bonded to the surfaces of belts 4 to be cured according to circumstances. Since the steel belts 4' having foreign matter such as the resin bonded thereto are subjected to surface grinding treatment when passed through a plurality of grinding brushes 5 on the way of the rotation due to rolls 4a, foreign matter is shaven off by the grinding brushes 5 and subsequently sucked and removed by dust collectors 6 to be certainly removed from the surfaces of the belts 4. Thereafter, the laminate 3 is pressed between the belts 4 but the resin of the prepreg 1 is cured under pressure and heating by the heating and pressing devices 9 inside the belts 4 to integrally laminate and bond the prepreg 1 and the metal foils 2.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a laminate manufacturing apparatus capable of continuously manufacturing metal foil-clad laminates used as printed wiring boards.

[Prior Art] Conventionally, metal foil-clad laminates are formed by laminating and bonding metal foil on the surface of prepreg, and the lamination and bonding of prepreg and metal foil can be achieved by, for example, bonding metal foil on one or both sides. The prepreg on which the foil is arranged is passed between electrodes for applying high frequency waves, and by dielectric heating under no pressure or contact pressure, the resin impregnated in the prepreg is heated and melted, and the resin is passed between belts driven by a drum. The prepreg and the metal foil are laminated and bonded together by heating and pressurizing the prepreg and curing the resin of the prepreg using a pressure and heating device.

[Problems to be Solved by the Invention] However, when the resin is melted by dielectric heating,
Melted resin may flow out and adhere to the surface of a belt such as a steel belt, and when the molten resin adheres to the belt and hardens, it can cause damage to the metal foil surface of continuously manufactured metal foil laminates. This results in the formation of irregularities, and there is a problem in that a metal foil-clad laminate with poor surface quality and having irregularities formed on the surface is manufactured. For this reason, in the past, a grinding brush was provided on the belt, and the surface of the belt was ground with this grinding brush to remove the hardened resin that had adhered to the belt. Currently, it is not possible to completely remove the hardened resin only by grinding with a grinding brush, and there have been cases where foreign matter that has been removed by a grinding brush ends up adhering to the surface of the belt again.

The present invention is intended to solve the above problems, and its purpose is to completely remove the hardened resin adhering to the steel belt using a plurality of grinding brushes and a dust collector, thereby improving the surface quality. The object of the present invention is to provide a laminate manufacturing apparatus capable of manufacturing laminates with good quality.

[Means for Solving the Problems] In order to achieve the above object, the laminate manufacturing apparatus of the present invention continuously feeds a long prepreg 1 and overlays a long metal foil 2 on the outer surface of the prepreg 1. In a laminate manufacturing apparatus in which a metal foil-clad laminate is obtained by continuously feeding the laminate 3 between the upper and lower belts 4 and applying heat and pressure between the upper and lower belts 4, A plurality of grinding brushes 5 remove foreign matter such as resin that adheres to the surface of the belt 4 when heating and pressing the laminate 3, and a plurality of grinding brushes 5 are arranged behind the grinding brushes 5 to suction and remove foreign matter scraped off by the grinding brushes 5. It is equipped with a dust collector 6.

[Function] Foreign matter such as resin that adheres to the surface of the belt 4 and hardens during heating and pressurization is scraped off by grinding the surface of the belt 4 with the grinding brushes 5 arranged at multiple locations, and then scraped off. The foreign matter is removed from the belt 4 by the dust collector 6.
It is removed by suction from the surface.

[Example] Hereinafter, the present invention will be explained in detail based on illustrated embodiments.

As shown in FIG. 1, the manufacturing equipment for manufacturing metal foil-clad laminates includes a stacking roll 7 for laminating a metal foil 2 onto a prepreg 1, and a pair of upper and lower electrodes for high frequency application arranged behind the stacking roll 7. 8, a pair of upper and lower belts 4 arranged behind the electrode 8, and a laminate 3 in which a metal foil 2 is laminated on a prepreg 1 is sandwiched between the two belts 4!
It consists of a pair of upper and lower heating and pressing devices t9, and a guide roll 1o that sends the manufactured laminate to the next process. The above-mentioned belt 4 is a double belt in which a steel belt 4' with no scratches or pinholes on its surface is wound between a pair of two rolls 4a on the left and right sides, and is rotated endlessly on the top and bottom. A plurality of grinding brushes 5 are arranged adjacent to each other on this belt 4 to grind the surface of the steel belt 4'. rA In the illustrated embodiment, the grinding brush 5 is arranged at two locations on one belt, but it may be arranged at two or more locations. By grinding the surface, if foreign matter such as resin is attached to the surface of the belt 4, the foreign matter can be scraped off. A dust collector 6 is disposed on the side of the grinding brush 5 for sucking and removing foreign matter such as resin scraped off by grinding the surface of the belt 4 with the grinding brush 5.

As shown in FIG. 2, this dust collector 6 includes a jetting body 6a that spouts high-pressure air, and a belt 4 from this jetting body 6a.
The foreign matter scraped off by the grinding brush 5 is lifted off the surface of the belt 4 by the high-pressure air jetted from the jetting body 6a, and then the foreign matter is removed from the suction body. 6c is an electrostatic bar provided on the ejector 6a, and the high pressure air ejected from the ejector 6a is ejected through the electrostatic bar 6c. As a result, high-pressure air that is ionized and free from static electricity is blown out, thereby preventing foreign matter that has been scraped off by static electricity from adhering to the surface of the belt 4 again. Thus, the prepreg 1 on which metal fiN2 such as copper foil is laminated is prepared as a long body by impregnating a base material such as glass cloth or paper with a thermosetting resin such as epoxy resin and drying it. Then, as shown in FIG. 1, the prepreg 1 is unwound from a roll and continuously supplied to four pairs of upper and lower belts. On the other hand, a metal foil 2 such as a copper foil is also formed into a long length and wound into a roll, which is unwound and superimposed on the outer surface of the outermost layer of the prepreg 1 by a stacking roll 7. When creating a double-sided metal foil-clad laminate, two sheets of metal foil 2 are superimposed on both outer surfaces of the prepreg 1, and when creating a single-sided metal foil-clad laminate, one outer surface of the prepreg 1 is overlapped. A piece of gold ME foil 2 is superimposed on the top.

Here, the metal foil 2 may be coated with an adhesive, or may be a combination of an aluminum carrier and an ultra-thin copper foil. The laminate 3 in which the prepreg 1 and the metal foil 2 are stacked in this way is passed between the upper and lower high frequency application electrodes 8, and the laminate 3 is impregnated by dielectric heating under no pressure or contact pressure. The resin is preferably heated to about 100°C to 140°C. At this time, electrode 8
It is desirable to use contact pressure to electrically connect the metal foil 2 and the metal foil 2. In addition, dielectric heating is performed until the resin in the prepreg 1 melts and becomes fluid, and when dielectric heating is performed in this way, the heating temperature becomes higher inside the prepreg 1 rather than on the surface. As in the case of external heating using electric heat, etc., the surface portion is heated to a higher temperature than the inside, and the curing reaction of the resin progresses faster on the surface portion of the prepreg 1, making it impossible for the air bubbles in the prepreg 1 to come out. As a result, air bubbles can be easily removed in the next step, and the amount of air bubbles remaining in the prepreg 1 can be reduced. After the resin in the prepreg 1 is melted by preheating by dielectric heating in this manner, the laminate 3 is introduced between the pair of upper and lower belts 4. Then, the laminate 3 is pressurized by the belt 4 lever, and a heating and pressurizing device 9 such as a heating plate is arranged inside each belt 4, and this heating and pressing also applies pressure to the laminate 3. The resin of prepreg 1 is cured by heating and the prepreg 1 and metal foil 2 are heated.
and are bonded together with laminated adhesive. Here, when the prepreg 1 was dielectrically heated to melt the resin, gas was generated or melted due to the melting of the resin.

The resin will flow laterally, and the molten resin may adhere to the surface of the belt 4 and harden. If the laminate 3 is heated and pressurized continuously in this state, unevenness will be formed on the surface of the metal foil 2 due to foreign matter such as resin that has adhered to the surface and hardened. The surface of the adhered steel belt 4' is ground by passing through a plurality of grinding brushes 5 during rotation by the roll 4a. The attached foreign matter is scraped off by a grinding brush, etc., and then the scraped foreign matter is suctioned and removed by the dust collector 6, and is reliably removed from the surface of the belt 4. Then, the cured laminate 3 is guided by guide rolls 9 and cut at predetermined locations using a cutting machine, for example, to obtain a metal foil-clad laminate having a predetermined width and length. Here, since the prepreg 1 is preheated by dielectric heating, there is virtually no difference in the heating rate between the prepreg 1 and the metal foil 2 when heated between the belts 4, and the prepreg 1 and the gold foil This makes it possible to prevent the occurrence of wrinkles in the metal foil due to the difference in thermal expansion between the two.

[Effects of the Invention] As described above, the laminate manufacturing apparatus of the present invention includes a plurality of grinding brushes for removing foreign matter such as resin that adheres to the surface of the belt when the laminate is heated and pressed between the upper and lower belts, and It is equipped with a dust collector placed behind the grinding brush to suction and remove foreign matter scraped off by the grinding brush.
Foreign matter such as resin that adheres to the belt surface and hardens when the laminate is heated and pressurized is completely removed from the belt surface by being reliably scraped off by multiple grinding brushes and then suctioned away by a dust collector. This makes it possible to completely remove foreign matter adhering to the surface of the belt and obtain a metal foil-clad laminate with good surface quality.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram showing one embodiment of the present invention, and FIG. 2 is a perspective view showing a dust collector, in which 1 is a prepreg, 2 is a metal foil, 3 is a laminate, 4 is a belt, and 5 is a grinding material. Brush 6 is a dust collector. Agent Patent Attorney Ishi 1) Long Seven-Flip Shiri 4-Held 5 Grinding Blanc (No collection!!li!

Claims (1)

[Claims] [1] While continuously feeding a long prepreg, a long metal foil is layered on the outer surface of the prepreg, and this laminate is continuously fed between the upper and lower belts, thereby applying heat and pressure between the upper and lower belts. In a laminate manufacturing device for producing metal foil-covered laminates, a plurality of grinding brushes are used to remove foreign matter such as resin that adheres to the surface of the belt when the laminate is heated and pressed between the upper and lower belts, and the grinding brushes are 1. A laminate manufacturing device comprising: a dust collector disposed at the rear for suctioning and removing foreign matter scraped off by a grinding brush.