JPS6349623B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a laminating device used for laminating a thin sheet material such as a copper foil or a release film onto a laminate in a continuous laminate forming method.

The following method has been developed as a continuous forming method for laminated plates used for electrically insulating substrates and the like. That is, an unsaturated resin having an unsaturated bond such as an unsaturated polyester resin, diallyl phthalate resin, or vinyl ester resin is diluted with a vinyl monomer (crosslinking agent), etc., and a polymerization initiator is further added to make an unsaturated resin varnish. 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 these resin-impregnated base materials are stacked to form a laminate. Then, while transferring this laminate,
This is a method of manufacturing a laminate by continuously laminating strip-like thin sheet materials such as copper foil on this laminate using a laminating device, and then heating it under no pressure. This method has high production efficiency because the laminate is manufactured by heating and curing under no pressure, without applying heat and pressure to the laminate one by one. In addition, when producing unsaturated resin varnish, the unsaturated resin is diluted with a crosslinking agent rather than with a solvent to create the varnish, so there is no need to use a solvent, which is advantageous in terms of resource savings. .

In this way, in this method of manufacturing a laminate,
A laminating device equipped with a pair of upper and lower laminating rolls continuously stacks thin strip-like sheets on the front and back surfaces of the laminate. That is,
Depending on the intended use of the product, a thin sheet-like material such as copper foil, which is necessary for the product, is laminated on one or both sides of the laminate. On the surface where the required thin sheet material such as copper foil is not overlapped, a thin sheet material such as release film is overlaid to prevent the problem of the laminating roll or transfer device being contaminated by the resin. . Further, in order to protect the necessary thin sheet-like material such as copper foil, a protective thin sheet-like material may be further superposed on top of the necessary thin sheet-like material. In any case, thin sheet-like materials are superimposed on both sides of the laminate.

By the way, since both the laminate and the thin sheet-like material are band-like objects, meandering occurs during the transition.
If this meandering is left unaddressed, the laminate may protrude from the upper and lower thin sheet materials at the position where the laminating rolls are caught. Therefore, a meandering correction device is used. As a result, the meandering of the thin sheet material can be corrected, and the meandering of the laminate at the base material stage can also be corrected. However, it is difficult to use this meandering correction device at a stage after resin impregnation, and even if it were used, meandering still tends to occur, and in the end, it is impossible to completely eliminate meandering in the laminate.

Therefore, it is conceivable to make the width of the upper and lower thin sheet-like materials sufficiently wide so that the laminate does not protrude even if the meandering occurs. However, apart from relatively inexpensive products such as release films, the necessary thin sheets such as copper foil are expensive, and if the width is increased and the amount of copper foil used increases, the product cost will increase. becomes high.
In addition, the parts such as copper foil that do not sandwich the laminate,
In the end, it is uneconomical because it is removed when it is made into a product.

This invention was made in view of these circumstances, and aims to reduce the cost of laminates by eliminating waste of thin sheets while maintaining normal operation of manufacturing equipment by preventing the equipment from being contaminated by resin. The present invention provides a laminating apparatus for manufacturing laminates that can produce laminates. This will be explained below.

A laminating apparatus for manufacturing a laminate according to the present invention is an apparatus comprising a pair of upper and lower laminating rolls for overlapping a thin sheet-like material on a continuously fed laminate of resin-impregnated base materials, the laminating rolls The present invention is characterized in that cutting means is provided in front of the laminating roll for trimming both ends of the laminate so that the laminate fits within the width of the thin sheet-like material at the biting position. This will be explained in detail below based on the drawings showing the embodiments.

FIG. 1 is a schematic diagram for explaining a method for continuously forming a laminate using an example of a laminating apparatus 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, thereby obtaining a strip-shaped resin-impregnated base material 1'. These plurality of resin-impregnated base materials 1'...
are overlapped by a pair of upper and lower rolls 4, 4 to form a sheet-like laminate 5. Meandering tends to occur after being impregnated with resin or after being overlapped by the rolls 4, 4, and the laminate 5 often moves in a meandering manner. The laminate 5 is then processed by a laminating device 6.
The copper foil 9 and the strip-shaped release film 10 are superimposed on the front and back surfaces. The copper foil 9 to be laminated here is coated with an adhesive resin dropped from a resin supply device 11 and then preheated in a heating furnace 12 .

FIG. 2 shows a laminating device 6 according to the present invention.
FIG. 3 is a perspective view thereof.
As shown in FIGS. 1 to 3, this laminating device 6 has a pair of upper and lower laminating rolls 7, 7.
A cutting means (slitter) 8 for trimming both ends of the laminate 5 is provided in front of the slit.
In this embodiment, the cutting means 8 includes a pair of upper and lower rotary blades 8', 8' that rotate along the direction in which the stack 5 moves. At the biting position of the laminating rolls 7, 7, the width of the laminate is adjusted so that the laminate does not protrude from the overlapped portion of the copper foil 9 and the release film 10. Both ends of the laminate 5 are trimmed so that it fits within the space.

Conventional laminating equipment is made up of only a pair of upper and lower laminating rolls, and these laminating rolls overlay thin sheet materials on the front and back surfaces of the laminate, but the meandering of the laminate is not corrected, so it cannot be used as is. The parts protruding from the thin sheet-like material stain the laminating roll. In contrast, the laminating apparatus according to the present invention is provided with a cutting means 8 in front of the laminating rolls 7, 7, and, for example, as in the above embodiment, circular rotary blades are used to sandwich the laminate 5 from above and below. 8',
8' is applied and rotated to trim both ends of the laminate 5 so that the laminate 5' after both ends are cut is within the width of the copper foil 9 and the release film 10. Therefore, the laminate 5' after both ends are cut off is made of copper foil 9 and release film 1.
0, the front and back surfaces are completely covered, and the laminating rolls 7, 7 are not soiled by the protrusion of the laminate. Of course, the positions of the rotary blades 8', 8' at both ends of the laminate 5 must be inside the outermost ends of the copper foil 9 and the release film 10, but the cutting area of the expensive copper foil etc. should be minimized as much as possible. Therefore, it is best to place it slightly inside the copper foil, etc., as a reference.

Therefore, there is no need to make the width of a sheet-like material such as a copper foil or a release sheet extra wide in consideration of the fluctuation range due to the meandering of the laminate, unlike in the past.
This is because even if there is a part of the laminate that meanderes and deviates in the width direction and protrudes from the edge of the sheet-like material, that part is always cut off before lamination. Therefore, there is virtually no waste in the sheet material. This point will be explained in more detail.

Conventionally, to obtain a laminate with a width of about 1000 mm, for example, a base material of 1050 mm is used (after heating and curing, the edges are trimmed to make a width of about 1000 mm). In the case of a 1050mm base material, the width will vary by about 50mm. Therefore, conventionally, a sheet-like material with a width of 1100 mm, which is 50 mm extra wide, has been used. However, using a sheet-like material with a width slightly longer than 1000 mm (for example, 1020 mm width) without any extra width, the laminating device of the present invention can produce a laminate with a width of 1000 mm that fits within the width of the sheet-like material. By cutting the sheets to the same size, the entire surface of the laminate can be covered with the sheet-like material without the need for extra width as in the conventional method. Therefore, the area of the sheet-like material is
The area is reduced by more than 7% (80÷1100×100),
The cost of the laminate is correspondingly lower. In the field of laminates, cost is the top priority, so even this level of cost reduction has great value.

The above runout measurement was performed using an unsaturated polyester resin as the impregnated resin, a paper base material as the base material, and a laminated number of 7 sheets.
The test was carried out under the conditions that the weight ratio of resin to base material was 1:1.

Here, copper foil and release film are superimposed on the front and back surfaces of the laminate 5, but various types of thin sheet-like materials may be superimposed depending on the purpose of the laminate.

The laminate 5'', which is made up of thin sheet-like materials stacked on top of each other, then enters the heating furnace 13 and is heated and hardened there.Next, it is pulled out from the heating furnace 13 by a pull-out roll 14 and sent to the cutter 15. Laminated board product 1 cut into desired dimensions with cutter 15
It becomes 6.

FIG. 4 shows another example of the laminating apparatus according to the present invention, in which, in addition to the cutting means 8, plate-shaped barriers 17, 17 are provided just before the laminating rolls 7, 7. The end faces of the gates 17, 17 are close to the front and back surfaces of both ends of the laminate 5', and are also close to the circumferential surfaces of the laminating rolls 7, 7. The reason why these gates 17, 17 are provided will be explained as follows. When a laminate is manufactured, resin gradually accumulates in front of the biting portion of the laminate rolls 7, 7, and this is transferred from the laminate 5' onto the thin sheet-like materials 9, 10. As long as the amount is small, it will not protrude from the upper and lower thin sheet materials 9, 10, but if it becomes large, it may eventually protrude and stain the laminating rolls 7, 7. Seki 1
7 and 17 prevent the resin from flowing out from both ends of the laminate 5'. This is possible because both ends of the laminate 5', which are caught between the laminating rolls 7, 7, are aligned.

Providing such a link is very effective in the following cases. As shown in Fig. 5, after the resin-impregnated base materials 1' are stacked on each other using rolls 4, 4, resin is applied and impregnated on the front and back surfaces of the laminate 5 in order to make the product surface smooth and beautiful. Sometimes. That is, the resin supply device 1 is installed on the top surface.
The resin is dripped from the pot 8, and the lower surface is impregnated by applying the resin 21 in the pot 20 with a roll 19'. 1 pair of upper and lower rolls 1
9 and 19' squeeze the resin dripped from the resin supply device 18, and at the same time apply the resin with a roll 19'. In such a case, resin tends to accumulate on the front and back surfaces of the laminate immediately before the laminating rolls 7, 7, and the resin tends to flow out from both ends of the laminate. Therefore, providing the barrier 17 is very effective.

According to the laminating apparatus according to the present invention, since there is no waste of thin sheets for laminating, it is possible to reduce the cost of the laminate, and since the entire surface of the laminate is sufficiently covered with the sheet-like materials, it is possible to use a resin-based apparatus. The production equipment is kept clean and the normal operation of the manufacturing equipment is maintained.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram for explaining a method for continuously forming a laminate using an example of a laminating apparatus according to the present invention, FIG. 2 is an enlarged view of the laminating apparatus shown in FIG. 1, and FIG. The figure is also a perspective view, the fourth
The figure is a schematic diagram showing another example of the laminating apparatus according to the present invention, and FIG. 5 is a schematic diagram of the laminating process. 7... Laminating roll, 8... Cutting means, 1
7...Seki.

Claims (1)

[Scope of Claims] 1. An apparatus comprising a pair of upper and lower laminating rolls for overlapping a thin sheet-like material on a continuously fed laminate of resin-impregnated base materials, the apparatus comprising: A laminating device for producing a laminate, characterized in that a cutting means for trimming both ends of the laminate is provided in front of the laminate roll so that the laminate fits within the width of the thin sheet material. 2. The laminating apparatus for manufacturing a laminate according to claim 1, wherein a barrier is provided behind the cutting means and immediately before the laminating roll to prevent the resin from spilling out to the side of the laminate.