JPH05318391A - Cutting method for prepreg - Google Patents

Abstract

PURPOSE:To accurately and steadily cut a prepreg as quality is maintained by vertically carrying the prepreg and heating it from its side with a heater and then cutting it for preventing a foreign matter or the like from adhering to the heater, and checking the falling and adhering of a foreign matter to the prepreg. CONSTITUTION:A prepreg is vertically carried by a feed roll 2 or the like. Next a heater 3 is arranged in parallel with the carrying direction of the prepreg 1 to heat the prepreg 1 from its side. After the prepreg 1 is heated with the heater 3, it is cut with a cutter 4 and carried to a fixed process through a drawing out roll 5. Since the prepreg 1 is cut after it is vertically carried and heated from its side with the heater 3, a foreign matter or the like can be prevented from adhering to the heater 3, and the falling and adhering of the foreign matter to the prepreg 1 can be dissolved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a prepreg cutting method. More specifically, the present invention is
The present invention relates to a prepreg cutting method capable of stably cutting with excellent cutting dimensional accuracy while maintaining quality.

[0002]

2. Description of the Related Art Conventionally, various printed wiring boards such as copper clad laminates have been widely used in various electric and electronic devices such as computers and information communication devices, which form the core of rapidly developing electronic technology. Is coming. A prepreg obtained by impregnating a glass substrate with a resin varnish component such as an epoxy resin is used for this printed wiring board.

This prepreg is used by cutting it to a predetermined length in advance when it is laminated and integrally formed with a metal foil or the like to form a laminated plate. For this cutting, conventionally, for example, as shown in FIG. The cutting method is as follows. In this cutting method, the prepreg (a) is conveyed horizontally from the feed roll (a) and heated by a heater (c) such as an infrared heater to make the prepreg (a) an appropriate softness, and then the cutter. It is cut in (d). The cut prepreg (a) is conveyed to the next step by the feed roll (e).

As described above, by heating the prepreg (a) before cutting, generation of dust and the like during cutting is prevented. Further, in this conventional cutting method, the heater (c) is used except when the prepreg (a) is heated.
Is covered with a shutter (f) so that the heater (c) is separated from the prepreg (a).

[0005]

However, in the conventional cutting method as illustrated in FIG. 2, for example, although cutting can be performed while suppressing generation of dust and the like, a heater () is provided above the prepreg (a). Due to the arrangement of (c), foreign matter rises due to the rising air current, and this foreign matter adheres to the shutter (F) that covers the heater (C) and is carbonized, and falls onto the surface of the prepreg (A). It has the drawback of being easy. Therefore, there is a problem that the quality of the prepreg (a) is deteriorated.

The present invention has been made in view of the above circumstances and solves the drawbacks of the conventional prepreg cutting method, and stably cuts with excellent cutting dimension accuracy while maintaining good quality. It is an object of the present invention to provide an improved prepreg cutting method capable of cutting the prepreg.

[0007]

In order to solve the above-mentioned problems, the present invention provides a method for cutting a prepreg, characterized in that the prepreg is conveyed in a vertical direction, heated by a heater from a side and then cut. To do.

[0008]

[Operation] In the prepreg cutting method of the present invention, since the prepreg is conveyed in the vertical direction and heated after being heated by the heater from the side, the prepreg is cut so that foreign matter or the like does not adhere to the heater or the shutter arranged over the entire surface. Can be prevented. Therefore, there is no problem of dropping or adhering foreign matter to the prepreg as in the conventional method, and it is possible to cut the prepreg with excellent precision in a predetermined dimension while maintaining stable quality. Therefore, the cutting dimension accuracy is improved together with the quality of the prepreg.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will now be described with reference to the drawings, and the prepreg cutting method of the present invention will be described in more detail. FIG. 1 is a sectional view showing an embodiment of a method for cutting a prepreg of the present invention. For example, as illustrated in FIG. 1, according to the present invention, a prepreg (1) obtained by impregnating a base material such as a glass mat, a glass sheet or paper with a resin varnish component such as an epoxy resin, an unsaturated polyester resin or a phenol resin. ) Is conveyed vertically by a feed roll (2) or the like. Then, a heater (3) such as an infrared heater is arranged parallel to the conveying direction of the prepreg (1) so that the prepreg (1) is heated from the side. After heating the prepreg (1) with the heater (3),
For example, it is cut by a cutter such as a rotary cutter (4) and conveyed to a predetermined process by a drawing roll (5).

In the present invention, since the prepreg (1) is conveyed in the vertical direction and is heated by the heater (3) from the side as described above, foreign matter or the like is prevented from adhering to the heater (3) even when an updraft is generated. It is possible to prevent the adherence to the surface heating part of (1). In addition, foreign matters and the like may adhere to a surface heating portion of the heater (3) or a shutter that can be arranged in front of the heater (3) to be carbonized, and the carbide may drop on the surface of the prepreg (1) to be carbonized. The quality of (1) does not deteriorate. It is possible to maintain the quality of the prepreg, prevent the generation of dust and the like, and accurately cut into a predetermined size. Furthermore, since the slack of the prepreg can be eliminated between the feed roll (2) for conveyance and the drawing roll (5), the accuracy of the cutting dimension of the prepreg can be improved.

In practice, a long length of prepreg manufactured by impregnating a glass mat having a thickness of 0.35 μm with about 25% by weight of epoxy resin varnish and drying and curing is heated by a heater while heating with a heater by the method illustrated in FIG. When cut, no foreign matter was observed, and the cut dimensions were extremely accurate. Of course, the present invention is not limited to the above examples. Heater configuration and structure,
Needless to say, various aspects are possible for details such as the type and structure of the cutter including the rotary cutter.

[0012]

As described in detail above, according to the present invention, it is possible to prevent foreign matter and the like from adhering to the heater, and to prevent the foreign matter from dropping or adhering to the prepreg and to maintain the quality in a predetermined size. The prepreg can be cut accurately.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a method of cutting a prepreg of the present invention.

FIG. 2 is a sectional view showing a conventional prepreg cutting method.

[Explanation of symbols]

 1 Prepreg 2 Feed roll 3 Heater 4 Rotary cutter 5 Drawer roll

Claims (2)

[Claims] 1. A method of cutting a prepreg, which comprises conveying the prepreg in a vertical direction, heating the heater from the side, and then cutting the prepreg. 2. The method of cutting a prepreg according to claim 1, wherein the prepreg is cut with a rotary cutter.