JP2000158199A - Hot press device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a laminar element having a high smoothness on an entire surface, by improving a structure related to an insulation plate and preventing the irregularity of pressure distribution on the insulation plate as much as possible so as to pressurize the overall of a workpiece at a constant pressure. SOLUTION: In this device, plural hot plates 61, 67 and the like are sequentially pushed up in a base stand chamber by raising a movable board 75, and a workpiece inserted between the hot plates is heated and clamped between an upper board 70 and the plates so as to integrally form a laminar element. Then, a insulation plate is arranged between the upper board, the movable board, and the hot plate. In this case, an abrasion powder accommodating groove part 25, into which the abrasion powder goes, is formed on top and bottom faces 20a, 20b of the insulation plate 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot press apparatus, and more particularly to an improved structure for a heat insulating plate.

[0002]

2. Description of the Related Art For example, in order to obtain a laminate of printed wiring boards, a hot press apparatus 5 as shown in FIG.
0 is used. This hot press device 50 includes
In one chamber 52, a plurality of hot plates 61, 62, 63, 6
As shown in FIG. 13, the movable plates 75 are sequentially pushed up by raising the movable plate 75, and the hot plates 61, 62, 63,
The work material (laminated material) L, L, L inserted between 64, 65, 66, 67 is heated and pressed against the upper plate 70 to be integrally laminated. At this time, the upper insulating plate 71 and the movable plate 75 and the lowermost plate are disposed between the upper plate 70 and the uppermost hot plate 67 so that the heat of the hot plate is not excessively transmitted to the upper plate 70 or the movable plate 75. Lower heat insulating plate 7 between heat plate 61
6 are arranged. Numeral 53 in the figure is a support, 54
Denotes a guide rail, 55 denotes a step board (top), 72 denotes a frame material of the upper heat insulating plate 71, 77 denotes a frame material of the lower heat insulating plate 75, and 79 denotes a ram of the movable platen.

A workpiece L for a printed wiring board includes an insulating resin layer made of a thermosetting resin such as an epoxy resin, a phenol resin, or a polyimide derivative, which forms an insulating layer;
A copper foil constituting a conductive layer is stacked in a predetermined configuration (generally also referred to as lay-up), and is heated and pressed by the hot press device 50, whereby the resin layer is fluidized and becomes conductive. It is laminated and cured integrally with the layers without gaps. When the resin layer and the conductive layer are integrated, a chamber 52 is used to avoid the occurrence of voids due to residual air bubbles and the like.
May be a vacuum atmosphere.

[0004] A photoresist layer is formed on the surface of the laminate of the workpiece L obtained in the above process in a later etching process, and a predetermined circuit pattern is formed by an exposure process. In the exposure step, if the surface of the laminate is not smooth, the irradiation of light in the exposure step will be distorted, making it impossible to accurately form a circuit pattern. Therefore, high smoothness is required for forming the laminate by the hot press apparatus.

As described above, in this type of hot press apparatus 50, the upper heat insulating plate 71 and the lower heat insulating plate 71 are provided so that the heat of the hot plate is not excessively transmitted to the upper plate 70 and the movable plate 75. Although the plate 76 is interposed,
There were the following problems. That is, the heat insulating plate 71,
In general, a laminated plate of silicon resin and glass fiber is used as 76, but heat and pressure during molding generate abrasion powder on the heat insulating plate, and the abrasion powder accumulates to cause uneven pressure distribution. This has the problem of adversely affecting the surface smoothness of the laminate.

In other words, the synthetic resin or glass fiber forming the heat insulating plate and the steel (metal) forming the hot plate and the upper plate or the movable plate have different thermal expansion coefficients, and the heat and pressure during the molding process cause the heat insulating plate to be formed on the heat insulating plate. A displacement occurs, and when the heat insulating plate moves laterally due to the displacement, abrasion powder of the heat insulating plate itself is generated between the two. As shown in FIG. 14 (FIG. 14 is an exaggerated view for explanation), the abrasion powder M
Is thickly deposited at the center portion of the heat insulating plate 71 and, in an extreme case, has a mountain-like shape. As a result, the center portion of the heat insulating plate 71 is high and the pressure distribution becomes uneven toward the outside. Needless to say, such unevenness of the pressure distribution adversely affects the surface smoothness of the formed laminate. Although the figure shows the upper heat insulating plate 71 between the upper plate 70 and the uppermost heat plate 67, the lower heat insulating plate 76 between the movable plate 75 and the lowermost heat plate 61 is described above. The same phenomenon occurs (see parentheses in the figure).

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and in particular, the structure of a heat insulating plate has been improved so as to minimize uneven pressure distribution in the heat insulating plate. It is intended to provide a hot press apparatus capable of pressing a whole with a uniform pressure to form a laminate having high smoothness over the entire surface.

[0008]

Means for Solving the Problems As means for solving the above problems, the invention of claim 1 firstly pushes up a plurality of hot plates in the machine chamber by raising the movable platen and inserts the hot plates between the hot plates. An apparatus for forming a laminated body by heating and pressing the processed material between the upper plate and the upper plate, wherein an insulating plate is disposed between the upper plate and the movable plate and the hot plate, A hot press apparatus according to the present invention is characterized in that wear powder accommodating grooves into which wear powder of the heat insulating plate enters are formed on the front and back surfaces of the heat insulating plate.

The invention according to claim 2 relates to the hot press apparatus according to claim 1, wherein the wear powder accommodating groove is formed concentrically or spirally from the center of the heat insulating plate.

A third aspect of the present invention relates to a hot press apparatus according to the first aspect, wherein the wear powder accommodating groove is formed in a straight line.

Further, according to a fourth aspect of the present invention, a plurality of hot plates are sequentially pushed up in the machine chamber by raising the movable platen, and the workpiece inserted between the hot plates is heated with a pressure between the hot plate and the upper platen. An apparatus for tightening and forming an integrated laminate, wherein an insulating plate is disposed between the upper plate and the movable plate and the hot plate,
According to a hot press apparatus, an auxiliary plate made of a hard plate having a smooth surface is arranged on the front and back sides of the heat insulating plate.

The invention according to claim 5 relates to a hot press apparatus according to claim 4, wherein a concentric, spiral, or linear wear powder accommodating groove is formed on the heat insulating plate pressing surface of the auxiliary plate.

Further, according to the invention of claim 6, a plurality of hot plates are sequentially pushed up in the machine chamber by raising the movable platen.
An apparatus in which a work material inserted between the hot plates is heated and pressed between the hot plate and an upper plate to form an integrated laminate, wherein a heat insulating plate is arranged between the upper plate and the movable plate and the hot plate. In what was done,
The present invention relates to a hot press apparatus, wherein a movement restricting member made of heat-resistant rubber for restricting a lateral movement of the heat insulating plate is arranged at an edge of the heat insulating plate.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a top view showing an embodiment of the heat insulating plate according to the first aspect of the invention, FIG. 2 is a cross-sectional view of a main part at the time of molding, FIG. 3 is a top view showing another example of the heat insulating plate, and FIG. FIG. 5 is a top view showing still another example, FIG. 5 is a sectional view of an essential part showing an embodiment of the invention of claim 4, FIG. 6 is a sectional view of an essential part showing another embodiment, and FIG. FIG. 8 is a top view showing another auxiliary plate, FIG. 9 is a top view showing still another auxiliary plate, and FIG. 10 is a top view showing another embodiment of the present invention. 11 is a sectional view, and FIG.
It is sectional drawing of the 1-11 line.

First, the heat insulating plate 20 shown in FIG.
2 and 13 is used in the hot press apparatus 50 shown and described above, and as described above, a plurality of hot plates 61, 62, 63, 64,
65, 66, and 67 are sequentially pushed up by raising the movable platen 75, and the workpiece L inserted between the hot plates is heated and pressed between the hot plate and the upper plate 70 to integrally form a laminate. The chamber 52 may be vacuum or non-vacuum. Insulation board 2
2, in this hot press device 50, as shown in FIG. 2, as an upper heat insulating plate between the upper plate 70 and the uppermost hot plate 67, or between the movable platen 75 and the lowermost hot plate 61. It is used as a lower heat insulating plate (see parentheses in the figure).

As shown in FIGS. 1 and 2, the heat insulating plate 20 according to the first aspect of the present invention has a wear powder accommodating groove 25 into which the wear powder of the heat insulating plate enters the front surface 20a and the back surface 20b of the heat insulating plate 20, respectively. It is characterized by being formed. FIG.
In the heat insulating plate 20 described above, the wear powder accommodating groove 25 is formed concentrically with the center of the heat insulating plate 20 as defined in the second aspect of the present invention. This is because, as described above, the abrasion powder generated by the heat insulating plate 20 itself and other parts generated at the time of molding is uniformly dispersed over the entire surface to prevent uneven distribution.

The wear powder accommodating groove 25 has a depth of about 1 to 2 mm, and the groove interval is set to 5 mm on both the front and back surfaces in the embodiment (the figure is exaggerated for convenience of explanation). And the same applies hereinafter). In the embodiment, as shown in FIG.
The wear powder accommodating groove portions 25 on the front surface 20a and the back surface 20b are provided so as to be shifted from each other, but are not necessarily shifted. If necessary, the depth and the groove interval of the wear powder accommodating groove 25 on the front surface 20a and the back surface 20b may be changed.

FIG. 3 shows an embodiment in which the wear powder accommodating groove 26 is formed in a spiral shape from the center of the heat insulating plate 21. The heat insulating plate 21 provided with the spiral circular wear powder accommodating groove portion 26 has the same operation and effect as the heat insulating plate 20 provided with the concentric groove portion 25 in the example of FIG.

FIG. 4 shows an example in which the wear powder accommodating groove 27 of the heat insulating plate 22 is formed in a straight line as defined in the third aspect of the present invention. The linear wear powder accommodation groove 27 is
There is a merit that it can be easily formed as compared with the above-mentioned concentric shape or spiral shape. The groove depth and the groove interval are the same as described above.

FIG. 5 shows an embodiment of the fourth aspect of the present invention, in which auxiliary plates 31 and 32 made of a hard plate having a smooth surface are arranged on the front and back sides of a heat insulating plate 30. According to the present invention, by arranging auxiliary plates 31 and 32 made of a hard plate having a smooth surface on the front and back sides of the heat insulating plate 30, the heat insulating plate 30 is provided.
The purpose of the present invention is to minimize the generation of abrasion powder during the lateral movement of the head. As the hard plate having a smooth surface which forms the auxiliary plates 31 and 32, a polished stainless steel plate is preferably used. This figure shows an example of an upper heat insulating plate between the upper plate 70 and the uppermost heat plate 67, and shows a lower heat insulating plate between the movable plate 75 and the lowermost heat plate 61. Is represented as parentheses.

FIG. 6 further relates to a fifth aspect of the present invention, wherein the auxiliary plate 33, 34 has a heat insulating plate pressing surface 33a, 34a.
Is formed with a groove 35 for accommodating wear powder. In view of the fact that the generation of abrasion powder cannot be completely prevented even with the auxiliary plates 33 and 34 made of hard plates having smooth surfaces, the present invention considers the heat insulating plate pressing surfaces 33a and 33a of the auxiliary plates 33 and 34.
The wear powder accommodating groove 35 is formed in the groove 34a to avoid uneven pressure distribution due to the presence of wear powder.

The insulating plate pressing surfaces 33a of the auxiliary plates 33, 34,
As described in relation to the first aspect of the present invention, the wear powder accommodating groove 35 formed in the heat insulating plate 34a is provided with the wear powder generated from the heat insulating plate 30 and the heat insulating plate pressing surfaces 3 of the auxiliary plates 33 and 34.
7 and 8, concentric grooves 35 or spiral grooves 36 can be formed from the centers of the auxiliary plates 33 and 34, as shown in FIGS. . Alternatively, a linear groove 37 as shown in FIG.

Further, FIG. 10 relates to a sixth aspect of the present invention, in which a movement restricting member 45 made of heat-resistant rubber for restricting the lateral movement of the heat insulating plate 40 is arranged at the edge of the heat insulating plate 40. is there. The movement restricting member 45 is shown in FIGS.
As shown in FIG. 2, the heat insulating plate 40 is densely arranged between the edge of the heat insulating plate 40 and the frame member 72 (or frame member 77) formed on the hot plate 66 (or movable plate 75). Thereby, the lateral movement of the heat insulating plate 40 at the time of molding is prevented as much as possible, so that the generation of wear powder is prevented.

[0024]

As shown and described above, according to the invention disclosed herein, a groove for accommodating abrasion powder into which abrasion powder of the adiabatic plate itself generated at the time of molding is provided (claims 1 to 3). Invention), and an auxiliary plate is disposed to reduce the generation of wear powder on the heat insulating plate (the inventions of claims 4 and 5). Further, the lateral movement of the heat insulation plate causing the generation of wear powder on the heat insulating plate is minimized. By providing the movement restricting member so as to prevent it (invention of claim 6), the pressure distribution unevenness during molding can be largely prevented. As a result, it is possible to press the entire workpiece with a uniform pressure and thereby efficiently form a laminate having high smoothness over the entire surface.

[Brief description of the drawings]

FIG. 1 is a top view illustrating an embodiment of a heat insulating plate according to the first aspect of the present invention.

FIG. 2 is a sectional view of a main part at the time of molding.

FIG. 3 is a top view illustrating another example of the heat insulating plate.

FIG. 4 is a top view illustrating yet another example of a heat insulating plate.

FIG. 5 is a sectional view of an essential part showing an embodiment of the invention of claim 4;

FIG. 6 is a sectional view of a main part showing another embodiment.

FIG. 7 is a top view illustrating an embodiment of the auxiliary plate.

FIG. 8 is a top view showing another auxiliary plate.

FIG. 9 is a top view illustrating still another auxiliary plate.

FIG. 10 is a sectional view of an essential part showing one embodiment of the invention of claim 6;

FIG. 11 is a sectional view taken along line 11-11 of FIG. 10;

FIG. 12 is a schematic front view showing an example of a conventional hot press device.

FIG. 13 is a schematic front view showing the movable plate in a raised state.

FIG. 14 is a cross-sectional view exaggeratingly showing a state of accumulation of wear powder on the heat insulating plate.

[Explanation of symbols]

 20, 21, 22 Insulating plate 25, 26, 27 Wear powder accommodating groove 30 Insulating plate 31, 32, 33, 34 Auxiliary plate 35, 36, 37 Abrasive powder accommodating groove 40 Insulating plate 45 Movement regulating member 50 Hot press device 52 Chamber 61, 62, 63, 64, 65, 66, 67 Hot plate 70 Upper plate 71 Insulating plate 72 Frame material 75 Movable plate 76 Heat insulating plate 77 Frame material L Workpiece

Claims (6)

[Claims] 1. A plurality of hot plates are sequentially pushed up in a machine base chamber by raising a movable platen, and a workpiece inserted between the hot plates is heated and pressed between the hot plate and an upper plate to integrally form a laminate. A heat insulating plate disposed between the upper plate and the movable plate and the hot plate, wherein a wear powder accommodating groove portion into which wear powder of the heat insulating plate enters is formed on the front and back surfaces of the heat insulating plate. A hot press device characterized by being performed. 2. The hot press apparatus according to claim 1, wherein the wear powder accommodating groove is formed concentrically or spirally from the center of the heat insulating plate. 3. The hot press device according to claim 1, wherein the wear powder accommodating groove is formed in a straight line. 4. A plurality of hot plates are sequentially pushed up by raising a movable platen in a machine chamber, and a workpiece inserted between the hot plates is heated and pressed between the hot plate and an upper plate to integrally form a laminate. A heat insulating plate disposed between the upper platen and the movable platen and the hot plate, wherein an auxiliary plate made of a hard plate having a smooth surface is disposed on the front and back sides of the heat insulating plate. A hot press device. 5. The hot press apparatus according to claim 4, wherein a concentric, spiral, or linear wear powder accommodating groove is formed on the heat insulating plate pressing surface of the auxiliary plate. 6. A plurality of hot plates are sequentially pushed up by raising a movable plate in a machine chamber, and a workpiece inserted between the hot plates is heated and pressed between the hot plate and an upper plate to integrally form a laminate. A heat-insulating plate in which an insulating plate is disposed between the upper platen and the movable platen and a hot plate, wherein a heat-resistant rubber is provided at an edge of the heat-insulating plate to restrict the lateral movement of the heat insulating plate. A hot press device characterized by disposing a movement restricting member.