JPH0618728B2 - Hot plate for laminated board manufacturing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a hot platen used for manufacturing a laminate.

(Prior Art) Laminates and copper-clad laminates widely used in the electronics industry are manufactured as follows.

That is, as shown in FIG. 2, when a plurality of prepregs obtained by impregnating a base material such as paper or glass cloth with phenol, epoxy resin or the like and dried for a certain time are copper-clad, place copper foil on one side or both sides. The laminated material 21 is sandwiched between the end plates 22 and a plurality of kraft papers or cushions 23 such as rubber and composite rubber cushion material are used above and below the end plate 22 and the carrier plate 24 is used to form the heating plate 31 surface shown in FIG. It is carried in and installed on the top, and it is molded by heating under pressure from the outside of the hot platen.

In FIG. 3, 31 is a hot platen, 32 is an upper plate, 33 is a support,
34 is a movable plate, 35 is a fixed part, 36 is a ram, 37 is an oil chamber, and 38 is an oil tank.

The laminated material 21 is put between the heating plates 31 while being placed on the carrier plate 24. Reference numeral 39 is a backing plate made of the same material as the carrier plate, for example, iron or copper, and is configured to be vertically symmetrical in the heating plate 31. The upper plate 32 is the fixed portion 3
5 is supported and fixed by a support column 33, and a movable plate 34
Is movably supported by columns on the ram 3, and the movable plate 34 presses oil into the oil chamber 37 by a pump, thereby allowing the ram 3 to move.
It is pushed up with the movement of 6. A large number of heating plates 31 are provided between the upper plate 32 and the movable plate 34, and the lamination material 21 placed on the carrier plate 24 by an appropriate stopper (not shown) is provided at an interval necessary to be carried in between the heating plates. It is held and installed movably upward. (The uppermost and lowermost heating plates are attached to the upper plate 32 and the movable plate 34, respectively.) As the movable plate 34 moves upward, the heating plate 31 is also pushed upward and fixed to the upper plate 32. Movable plate 34
And the laminated material 21 is compression molded.

The heat required for compression molding is supplied by flowing steam into a pipe (not shown) embedded in the hot platen.

(Problems to be Solved by the Invention) In a laminated plate, scratches and voids are of practically important quality and are strictly standardized in JIS, MIL and the like. However, when molding a laminated plate, those scrapes and voids are controlled by the resin flow and gelation time on the resin surface, while controlling the temperature rise during pressing and using kraft paper, rubber cushion, etc. as a cushion material. Molding was then carried out by covering the irregularities of the heating plate, but especially in the case of a thin laminated material of epoxy resin, voids were generated due to scratches on the upper surface of the heating plate that occurred when carrying in and out the laminated material. In order to prevent such scratches, a method of putting it on a heating plate with a fork has been studied, but since it is carried in and out from one direction, the efficiency is poor and the number of presses is reduced, and the number of laminated plates produced is reduced.

The present invention provides a hot platen in which a plate and a laminated material are inserted without causing scratches on the upper surface of a press hot platen, and pressure, heating, and cooling are performed for a certain period of time to prevent scraping or voids in the molded laminated material. Is.

(Means for Solving Problems) The present invention will be described with reference to the drawings illustrating an embodiment of the present invention.

FIG. 1 shows the main part of the hot plate of the present invention. FIG. 1A is a front view,
FIG. 1B is a side view, 11 is a heating plate, 12 is a guide, and they are attached to the heating plate 11 by two bolts 15. A roller 13 is attached to and supported by the support piece 16 of the guide 12. The roller 13 is attached so that there is a predetermined gap between the upper surface of the roller 13 and the lower surface of the heating plate 11 to which the guide 12 supporting the roller 13 is attached. Carrier plate 2
4 is placed on the guide surface 14
That is, the roller 13 is placed on the upper surface of the roller 13 and inserted under the heating plate 11.

The distance between the guide surface 14 and the bottom surface of the heating plate is determined by the thickness of the laminated material or the like to be inserted. In addition, the guide surface 14 is
It will be positioned higher than the upper surface of the hot platen installed below. The distance between the guide surface 14 and the upper surface of the heating plate installed below is at least 5 to 20 mm, preferably about 10 mm, in order not to scratch the upper surface of the heating plate installed below. To do. This distance varies depending on the size of the heating platen. For example, in the case of a heating plate having a size of 500 × 500 mm, the distance may be 3 mm even if the deflection of the carrier plate 24 due to thermal stress is taken into consideration.
mm or 1200 × 2100 mm hot platen requires at least 10 mm. In order to ensure that the upper surface of the hot platen installed below is not scratched, the spacing may be set large and set to 20 to 30 mm. However, if the distance between the heating plates is the same, the distance between the guide surface 14 and the lower surface of the heating plate cannot be set large, and the work of inserting the laminated material 21 is difficult. If the distance between the guide surface 14 and the bottom surface of the heating plate is increased, the upper plate 32 of the press and the movable plate 34 are pressed.
You have to reduce the number of hot plates installed between
In any case, it causes a problem in productivity.

In order to insert the carrier plate 24 smoothly, the inside of the support piece 16 to which the roller 13 is attached and supported (first
It is desirable that the corners are curved, as indicated by the arrow C in FIG.

The roller 13 is preferably made of a material that withstands heat and a heating / cooling cycle during pressing and does not generate rust.

The guide surface 14 is not limited to the roller.

The guides form a pair to support and slide laminated materials and the like on the guide surfaces, and two or more sets are attached to opposite side surfaces of the hot platen. In this case, as shown in Fig. 4, it is necessary to install the guides 12 on the hot platen 11 and the hot platens 11 'and 11 "above and below the guide plates 12 so that they are not placed at the same position. It is also necessary to provide the guides at least outside the position where the lower heating platen is raised so as not to hinder the raising of the heating platen.

(Effects of the Invention) When the hot platen of the present invention is used, scraping due to scratches on the hot platen, which occurs when molding is carried out by a conventional loader transport method,
There are no voids, and the need for regular polishing and pressing of the hot platen is eliminated, and the life of the cushioning material can be extended. Further, the power to be carried from the loader can be carried with little power, and further it can be applied to the conventional hot platen as it is.

[Brief description of drawings]

FIG. 1A. B is a front view of the main part of the heating plate of the present invention,
A side view, FIG. 2 is a front view showing the constitution of the laminated material, FIG. 3 is a front view of the press machine, and FIG. 4 is a side view of the hot platen. Explanation of symbols 11 …… Hot platen 12 …… Guide 14 …… Guide surface 24 …… Carrier plate

Claims (1)

[Claims] 1. A guide surface having a predetermined space between the opposite sides of the hot platen and a lower face of the hot platen, and supporting and sliding an end portion of a laminated material inserted between the hot platens. A hot plate for producing a laminated plate, characterized in that two or more sets of a pair of guides having the above are installed.