JPS5849251A - Corrector for corrugation for manufacturing laminated board - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rounding device 1lIK used for correcting undulations that occur in a laminate body in a continuous laminate forming method.

) of laminates used for electrically insulating substrates, etc. ! The following method can be used as the method of Eiwei. That is, unsaturated polyester resin, diallyl phthalate 11
An unsaturated resin having an unsaturated bond such as ft, vinyl ester 11&, etc. is diluted with vinyl 7mer (crosslinking agent), etc., and further polymerized Il! An initiator is added, an unsaturated resin varnish is applied, and a base material such as a strip of paper or glass cloth is impregnated with this to continuously create a resin-impregnated base material. Next, a plurality of sheets of this 4111 fat-impregnated base material are stacked to form a laminate. Next, while transferring this laminate, using a laminating machine, a strip-shaped thin sheet material such as copper foil is continuously layered on this laminate to form a laminate main body, and then this laminate body is laminated. This is a method of manufacturing a laminate by heating it with an unpressurized knife. This method L1 laminate bulk body is manufactured by heating and curing in an unpressurized F, without applying heat and pressure to the laminated plate in a press machine, so the raw*W peak is very popular. Nine, when producing unsaturated tung fat varnish, unsaturated lll1i
Since varnish is made by diluting I with a cross-linking agent rather than diluting it with a diluent, there is no need to use a diluent, and there is also a problem in terms of saving R resources.

However, in this continuous non-pressure forming method, the long belt-shaped laminated #L bulky body obtained from the laminated upper layer is transferred by placing it on a steel belt etc. and then heated and hardened in a heating furnace (Kieer furnace). During the transition, tension is applied to the laminate body, which causes the peaks and valleys to wave in the direction of transition, which is fixed by heat curing and remains in the logging board product. Figure 1 shows the laminate body 5'
Please see how such a wave nail 'G)51' is formed.

In the figure, an arrow indicates the direction of movement of the Ati laminate body 5'.

The inventors attempted to correct this waving by applying pressure, and tried the following method. That is, at an appropriate stage before the laminate body is cured, as shown in FIG. In this method, while rotating the arrows B and K, they sandwich the laminate-element body 5' and apply pressure from both sides to correct the waviness. The method of straightening the wafer by using a laminate was not effective enough, and the waviness of the laminate body could not be completely corrected.

The inventors further experimented with various correction methods9. In the process, it was discovered that when the laminated plate element 5' is bent so as to form a convex surface as shown in FIG. 3, the undulations on the convex surface are reduced or even disappear. And this situation 11
It was found that the waviness of the entire laminate body can be effectively corrected by applying pressure by sandwiching it between a pair of rolls, and this invention has been completed.

That is, the corrugation straightening device for manufacturing laminates according to the present invention moves a pair of rolls that sandwich continuously fed laminate blanks in the feeding direction, and the surface of the laminate blanks is smoothed. It is characterized by nine pieces arranged in a staggered manner. Hereinafter, embodiments will be described in detail with reference to the accompanying drawings.

FIG. 4 is a schematic diagram for explaining a continuous forming method of a laminate using an example of the correction device according to the present invention. As shown in the figure, a strip-shaped base material 1 wound into a roll is continuously fed in the direction of arrow A by a plurality of sheet feed rolls 2. Next, each base material 1 is impregnated with resin by dropping unsaturated resin varnish from the upper resin supply device 3, respectively, to obtain a resin-impregnated base material 1'ee-.

These plurality of resin-impregnated base materials l', . A strip-shaped release film 6 and copper foil 7 are superimposed on the front and back surfaces of this laminate 50 by a laminating roll 8.8 to form a laminate body 5r. Here, seven copper foils are laminated, adhesive resin is dripped from the resin supply device 9, resin coated, and then preheated in a heating furnace 10. In this embodiment, copper foil and release film are overlaid on the front and back surfaces of the laminate 50, but depending on the purpose of use of the laminate, copper foil or release film may be overlaid on only one side or both sides. , there are also cases where no number of sheets are superimposed on both sides.

The laminate body 5', which is continuously produced by overlapping copper foil, release film, etc. on the laminate 5 or not overlapping the laminate 5, is then sent to a heating furnace (curing furnace) 11, where it is heated. Heated (cured) under no pressure.

After that, if the laminate body 5' is allowed to harden as it is, waving and warping (curvature occurring in the flow direction) will remain in the product. Therefore, when the laminate body immediately after curing is soft at high temperature, the corrugation straightening device 12 according to the present invention is used to correct the corrugation on the front and back surfaces. This straightening device 12 is equipped with five pairs of rolls, ie, straightening rolls 13 and 13', which sandwich the laminate body 5'. They are arranged in a staggered pattern. The reason for this arrangement is explained as follows.

When the laminate body meanders up and down, that is, when its surface is uneven, the undulations become smaller in the curving portions. Then, if you do 41 strokes straight without doing a few strokes, the undulations will appear again and become larger. However, if the area where the waving becomes smaller and needs to be removed is pressed between the front and back using a pair of rolls, the waving will be corrected and the surface of the laminate body will become smooth. is fixed. Therefore, even if the laminate body is stretched straight and fed, it is unlikely that the waving will occur again, and the effect of correction will be maintained. Straightening rolls 13, 1
Roll 1 disposed on the convex side of the laminate body 5' among 3'
If a roll made of an elastic material such as rubber is used as roll 3 (shaded roll) and a roll made of a rigid material such as metal is used as roll 13' on the opposite side, the effect of straightening will be even greater. It's very desirable. In this case, #
! This is because, as shown in FIG. 5, the elastic roll 13 on the convex side is deformed and the area of suppression against the convex surface of the laminated plate vehicle body 5' increases.

After passing through this straightening device 12 and having its waving and warping corrected, the laminated plate car body 5' is completely cured, and then passed through the feed roll 14.
etc., to the cutter 15. Then, it is cut into a desired size to form a laminate product 16.

The undulation correction device according to the present invention meanderes the laminated plate car body to create an uneven surface, and pressurizes the curved portion with a pair of rolls, so that undulations can be sufficiently corrected.

For this type of armpit correction device, t$6 and 7
Correction devices such as those shown in the figure can be considered, but these have little correction effect. Straightening device 1 shown in diagram aS
8 is a pair of rolls 13 and 1 that sandwich the laminate body 5'.
3' are arranged on the same plane along the feeding direction,
Of each pair of rolls, the upper ones (shaded rolls) in the drawing are all rubber rolls 13, and the lower ones are all metal rolls 13'. This straightening device 18 only pressurizes the laminate body 5' from the front and back while it is in a facing state, so that the straightening effect is small. Iris 7 corrective device 19
In this case, single rolls 20 that do not form pairs are arranged in the feeding direction, and while the laminate body 5' passes through these rolls 20, every other roll passes under it and is rolled, so that its surface is uneven. It has become.

In this straightening device 19, the waving at the bent portion of the laminate body 5' is once reduced and eliminated, but since no pressure is applied there, the laminate body 5I returns to its original face shape. When it returns to normal, the ripples will regenerate and expand. Therefore, the effect of correction is still small.

In the first embodiment of the corrugation straightening device according to the present invention, a pair of rolls for forming an uneven surface on the laminate body 5' is 5f.
However, since it is sufficient that the laminate has at least one bent portion, it is sufficient to arrange one pair of such rolls, or any number of pairs of rolls, including 2 or more.

Furthermore, in the above description of the continuous non-pressure forming method, the corrugation straightening device is used immediately after curing, but if the laminate body is not yet cured, it can be used during curing.

It can be used at any stage, such as before curing. However, it is most effective to use it immediately after curing, when the laminate is hot and soft.

In this invention, the laminate body is not limited to the one described above, but is made from a synthetic resin sheet made by thinly extruding a resin composition whose main component is unsaturated polyester resin or other synthetic resin. , or those in which the required number of synthetic resin sheets and laminate substrates are alternately laminated, and those in which metal foil is laminated on these sheets are also included.

The undulation correction device according to the present invention is configured as described above, and the undulation is corrected by making the laminated plate car body meander so as to create an uneven surface, and applying pressure from both sides at the curved part. Therefore, by using this straightening device, it has become possible to obtain a laminate product with less waviness and less curling.

[Brief explanation of drawings]

Figure 1 is a perspective view of the laminate body with waving, Figure 2
The figure is an explanatory diagram when applying pressure to correct the waviness of a face-shaped laminated plate car body, Fig. 3 is a perspective view of the laminated plate element body with waviness being bent, and tIK4 is the invention K. A schematic side view for explaining a continuous forming method of a laminate using an example of such a corrugation straightening device, Figure 5 is a side view showing a pair of rolls in the corrugation straightening device according to the present invention, Figure 6 and Figure 7 are FIG. 2 is a schematic side view showing an example of a correction device having less correction effect than the undulation correction device according to the present invention. 5'-, laminate body 12. ,,Waviness correction device 1
3, 13'... Straightening roll patent applicant Matsushita Electric Works Co., Ltd. agent Patent attorney Takehiko Matsumoto Figure 3

Claims (2)

[Claims] (1) A plurality of pairs of rolls are arranged in a staggered manner in the feeding direction so that the surface of the laminate body forms a convex curve to produce nine laminates. Technique correction/device. (2) The pair of rolls is an elastic roll and an m-column roll, and the elastic roll is arranged at the 6th corner of the laminate body. Wavy correction device.