JPS5849250A - Manufacture of 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 method for manufacturing a laminate.

There are the following methods for manufacturing laminates used for electrically insulating substrates and the like. That is, an unsaturated resin having unsaturated bonds such as unsaturated polyester resin, diallyl phthalate resin, vinyl ester resin, etc. is diluted with vinyl nitrate (crosslinking agent), etc., and a polymerization initiator is further added to form an unsaturated resin face. Make this with a strip of paper or moth? The resin-impregnated base material is continuously created by impregnating it into a base material such as cloth. Next, a plurality of sheets of this resin-impregnated base material are layered while being transferred, and if necessary, a strip of copper foil or a release film is layered while being transferred to continuously peel off the laminate.

Next, the laminate is transferred and heated under no pressure to continuously produce a laminate, which is then cut into desired dimensions. In this method, the resin-impregnated base material is laminated while being transferred, and the resulting laminate is heated and cured under no pressure while being transferred, without placing each laminate in a press and applying heat pressure. Since this method continuously manufactures laminates using multiple steps, production efficiency is high.

In addition, when producing an unsaturated resin varnish, since the unsaturated resin is dissolved, there is no need to use a solvent, which is advantageous in terms of resource saving and the like.

However, in the manufacturing method of such a laminate including continuous non-pressure forming, the base material and the resin-impregnated base material are continuously fed in the form of a belt, so it is unavoidable that the base material and the resin-impregnated base material move in a meandering manner. Therefore, before stacking the resin-impregnated base materials, it is necessary to correct the meandering so that there is no misalignment in the stacking of the resin-impregnated base materials. Conventionally, the meandering of the base material has been corrected before it is impregnated with resin. However, since a certain amount of impregnation time is required after applying the resin, the distance to the squeeze roll that overlaps the resin-impregnated base material becomes long, and the elongation of the base material becomes uneven due to uneven impregnation in the width direction. The meandering of the resin-impregnated base material immediately before stacking can be significant due to causes such as the influence of hydraulic pressure caused by the difference in the amount of resin in the width direction at the entrance of the squeeze roll, and this can be effectively corrected. It was hoped that.

This invention was made to meet this need. The method for manufacturing a laminate according to the present invention is a method of manufacturing a laminate by laminating seven consecutively supplied resin-impregnated base materials while transferring them, and curing the obtained laminate, and the method includes: It is possible to change the angle of the resin-impregnated base material in the forward or reverse direction with respect to the transfer direction while it is in contact with the surface of each resin-impregnated base material. By installing a position detecting means for detecting a positional deviation in the width direction from the normal transfer position of the material, and changing the angle of the guide roll in the forward or reverse direction based on the position detection signal obtained from the position detecting means, The feature is that the meandering of each resin-impregnated base material is corrected. Hereinafter, embodiments of the present invention will be explained in detail with reference to the accompanying drawings.

FIG. 1 is a schematic diagram illustrating an example of a method for manufacturing a laminate according to the present invention. As shown in the figure, in this method as well, a strip-shaped base material 1 wound into a roll is continuously supplied in the direction of arrow A by a plurality of sheet feed rolls 2. Next, each base material l is impregnated with resin by dropping unsaturated resin varnish from the upper resin supply device 3, thereby forming a strip-shaped resin-impregnated base material 1'.
...is obtained. These multiple resin-impregnated base materials 1'
... are overlapped by a pair of upper and lower rolls (squeeze rolls) 4.4 to form a strip-shaped laminate 5. A strip-shaped release film 6 and copper foil 7 are superimposed on the front and back surfaces of this laminate 5 by a laminating roll 8.8.

The copper foil 7 to be laminated here is coated with adhesive resin by dropping adhesive resin from the resin supply device 9, and then preheated in the heating furnace 10.

In this example! j. TK4 foil and release film are placed on the front and back sides of the laminate, but depending on the purpose of use of the laminate, metal foil such as copper foil or release film may be overlaid on only one side or on both sides. There are also cases where nothing is superimposed on both sides. The laminate 5, with or without overlapping copper foil, release film, etc., is sent to a heating furnace 11 in its strip form, where it is heated and hardened under no pressure to become a laminate 5', which is then cut into a cutter 12.
The product 13 is then cut into desired dimensions.

In the method for manufacturing a laminate according to the present invention, during this time,
By operating the guide roll 14 installed immediately before the squeeze roll 4.4, the meandering of each resin-impregnated substrate 1' is corrected.

The guide roll may consist of a pair of upper and lower guide rolls.

The guide roll 14 rotates in the transfer direction of the resin-impregnated base material 1', and rotates in the transfer direction (in the figure) as shown by the solid line in FIG. 2 when the resin-impregnated base material 1' is in the normal transfer position. If you maintain a posture perpendicular to the direction of arrow B) and move in a meandering direction from the normal transition position in the width direction, that is, to the right of the left gate, as shown by the two-dot chain line (A) or (B) in Figure 2. The angle with respect to the transition direction can be changed forward or backward so that the orientation deviates from the orthogonal orientation. During this time, the guide roll 14 continues to be in contact with the surface of the resin-impregnated base material 1', so that the resin-impregnated base material 1' corrects its deviation from the normal transition position due to the forward and reverse rotation of the angle described above. Meandering is corrected.

The above-mentioned operation of the guide roll 14 is controlled by a position detection number 46 obtained from a position detection element for detecting a positional deviation in the width direction from the normal transfer position of the resin-impregnated substrate. This position detection means is configured as follows, for example. That is, it comprises a light emitting means that emits light toward a point located on the outside of the side edge when the resin-impregnated base material is in the normal transition position, and a detection means that detects the reflected light of this light. There is. The light emitting means and the detection means may be composed of separate parts, but one part may also serve as the self means, as in the case of the reflective light w tube sensor 151115BL15C shown in FIG. . next,
This position detecting means emits light as shown in FIG. It also includes a light absorbing member 16m116bl16C installed at a position facing the means, that is, SE:/l-1sa*15J15C. The light absorbing member 161116b116C has a function of absorbing light to a degree similar to that of a black body, and has a shape such as a plate shape. Figure 3, numbers 141&, 14be
14C is each resin-impregnated base material I'm #l'b #1'
It is a guide roll that comes into contact with C.

As long as one edge of the resin-impregnated base material 1' is inside the point where it should be when maintaining the normal transition position, the emitted light is absorbed by each light absorbing member 1fl, 16b or 16C and is not reflected. - When the side edges are shifted outward from the point where they should be, the light hits the resin-impregnated base material 1' and is reflected, as shown by the folded arrow line in FIG.
15b or 15C. Based on this detection signal, the corresponding guide roll 14m, 14b or 14(
changes its angle, so its negative edge is brought back inward.

The same applies to the other side edge. This will be explained in more detail.

Figure 884 shows upper and lower three resin-impregnated base materials I'a l l'
b*1'c are all at the normal transition position, and each minus side edge is located at the desired point P. In the figure, 14al14b@14C is a guide roll,
lfl@16bl 16C is a light absorbing member. same as below. When the uppermost resin-impregnated base material 1/l meanderes and deviates from the normal transition position, it becomes as shown in FIG. 5, and its minus side edge extends beyond point P. In this state, the light emitted from the sensor 151 is directed toward the resin-impregnated base material 1'.

reflected by. When the resin-impregnated base material l'b in the middle meanderes and deviates from the normal transition position, it becomes as shown in FIG.

In this state, the light emitted from the sensor 15b is reflected by the resin-impregnated base material 1'b. When the resin-impregnated base material 1/c directly below meanders and deviates from the normal transition position, it becomes as shown in FIG. 7, with its negative edge extending outward from point P. Therefore, the light emitted from the sensor 15C is reflected by the resin-impregnated base material 1'c.

Even if a plurality of upper and lower resin-impregnated base materials rub against each other at the same time, the same thing will happen for each resin-impregnated base material.

If the guide roll that contacts the resin-impregnated base material below is made black, it will also serve as a light absorbing member.

According to such a light reflection type position detection means, there is no staining of the sensor due to resin.

The method for producing a laminate according to the present invention is configured as described above, and meandering of the resin-impregnated base material immediately before lamination is reduced or eliminated, so the yield of laminate production is high and costs can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a schematic explanatory diagram of the method for manufacturing a laminate according to the present invention;
Fig. 2 is a plan view for explaining the operation of the guide roll;
FIG. 3 is a side view of the meandering correction device, and FIGS. 4 to 7 are plan views for explaining the operation of the meandering correction device. 1' + l'it l'be l'c' ” 'Resin-impregnated base material 4.4... Squeeze roll 5... Laminate 5'... Laminate plate t4t14m+14bt14
c...Guide roll 15"* 15J 15C--
Sensor 16m, 16b, 16 (...Light absorbing member patent applicant Matsushita Electric Works Co., Ltd. agent Patent attorney Takehiko Matsumoto Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7

Claims (2)

[Claims] (1) A method of manufacturing 114 laminated boards by laminating continuously supplied resin-impregnated base materials while moving them and curing the obtained laminate, in which each resin-impregnated base material immediately before lamination is ,
While in contact with the surface of the resin-impregnated base material, the angle of the resin-impregnated base material with respect to the transfer direction can be changed forward or reverse. A guide roll is brought into contact with the resin-impregnated base material, and a position detection means is installed to detect the positional deviation in the width direction from the normal transfer position of the resin-impregnated base material, and based on the position detection signal obtained from this position detection means - A method for manufacturing a laminate, characterized in that the meandering of each resin-impregnated base material is corrected by changing the angle of the guide roll in forward and reverse directions. (2) The position detection means includes a light emitting means that emits light toward a point located on the outside of the side edge when the resin-impregnated base material is in the normal transfer position, and a detection means that detects the reflected light of this light. and a light absorbing member capable of absorbing light, which is installed at a position facing the light emitting means across a point located on the outside of the side edge. Manufacturing method of the described laminate.