JP2549946B2 - Hot press machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mounts heat plates to be heated on upper and lower surface plates which can be driven to separate from and contact each other, and heats the work piece under pressure by heating the surface plate by driving the surface plates. The present invention relates to a pressure press device.

[0002]

2. Description of the Related Art Conventionally, for the joining of plywood and the thermocompression molding of laminated substrates, hot plates to be heated are mounted on the upper and lower surface plates that can be driven to separate and contact, and the workpieces are heated by driving the surface plates. A hot press machine is used that is sandwiched between the plates and heated under pressure. In such a hot press machine, when the surface plate is heated by the heat from the attached heating plate, the surface plate may be warped or distorted, or the frame holding the surface plate may be deformed. Since the accuracy is lowered, and as a result, defective molding occurs, the hot plate is attached to the surface plate through a heat insulating material such as asbestos or glass wool.

[0003]

However, even when a hot plate is mounted on a surface plate through a heat insulating material as in the above-mentioned conventional case, when heat is continuously pressed for a long time, heat which is gradually transferred through the heat insulating material. The platen is heated in this way, and there is a problem that the platen is deformed as described above to cause defective molding.

[0004]

SUMMARY OF THE INVENTION In view of the above circumstances, it is an object of the present invention to prevent the surface plate from being heated by the heat transmitted from the hot plate even when the press work is continuously performed for a long time, and to perform the molding while maintaining the accuracy. An object of the present invention is to provide a hot press machine that can prevent the occurrence of defects.

[0005]

To achieve the above object, according to the present invention, the uppermost and lowermost heat plates are mounted on a pair of pressure platens via a heat insulating material, and each pressure platen is attached. It is characterized in that a cooling medium passage is formed in the vicinity of the heating plate mounting surface inside the plate.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of a hot press machine to which an embodiment of the present invention is applied, and FIG. 2 is a front view conceptually showing a cooling passage of a surface plate thereof. The illustrated hot press machine is a frame 1
A fixed surface plate 1 is arranged on the upper part of 0, a movable surface plate 2 is arranged on the lower part, and a plurality of heat plates 4 are arranged between the fixed surface plate 1 and the movable surface plate 2. There is.

The hot plates 4 ... Are provided on both sides of the hot plates 4 by laterally projecting stepwise locking members fixed to guide columns (not shown) extending in the arrangement direction of the hot plates 4. Also, a not-shown locking portion is supported and arranged so as to have a predetermined feeling with each other in the vertical direction. Surface plate heat plates 5 and 6 are attached to the fixed platen 1 and the movable platen 2 at positions corresponding to the heat plates 4 via heat insulating materials 8. A heater is internally provided in each of the heating plates 4 ... And the platens 5 and 6, and is heated to a predetermined temperature by the heater controlled by a controller (not shown). The movable platen 2 is moved up and down by the hydraulic cylinder 3 installed on the lower frame 11 by the supply of hydraulic pressure from a hydraulic drive source (not shown), and by raising the movable press platen 2, the hot plate located at the bottom is moved. Lifted in sequence from 4,
Finally, a plurality of hot plates 4 are laminated with the fixed press platen 1 so that the compound such as a printed circuit board placed on the hot plates 4 is subjected to a heat pressing process. Is.

Here, in the fixed surface plate 1 and the movable surface plate 2,
Cooling medium passages 11 and 21 as shown in FIG. 2 are formed respectively. The cooling medium passages 11 and 21 are formed as a circuit that meanders left and right so as to circulate the entire area of the surface plates 1 and 2, and is formed so as to be biased toward the surface plate mounting surface side of the surface plate.

Thus, in the multi-stage press apparatus configured as described above, the cooling medium such as cooling water is pressure-fed and circulated through the cooling medium passages 11 and 21 of the fixed surface plate 1 and the movable surface plate 2 during the pressing operation. As a result, the heat transferred from the heat plates 5 and 6 through the heat insulating material 7 can be taken away by the cooling medium, and the overheating of the surface plates 1 and 2 can be suppressed. Therefore, even if the press work is continuously performed for a long time, Molding defects due to warpage and distortion due to temperature rise of the platens 1 and 2 will not occur.

[0010]

As described above, according to the present invention,
It is possible to prevent the surface plate from being overheated by the heat transmitted from the hot plate, maintain accuracy, and prevent the occurrence of defective molding.

[Brief description of drawings]

FIG. 1 is a front view of a hot press machine to which an embodiment of the present invention is applied.

FIG. 2 is a plan view conceptually showing a cooling passage of a surface plate.

[Explanation of symbols]

 1 …… Fixed surface plate (pressurized surface plate) 2 …… Movable surface plate (pressurized surface plate) 5,6 …… Surface plate heating plate 11, 12 …… Cooling medium passage

Claims (1)

(57) [Claims] 1. A plurality of heating plates are provided between a pair of upper and lower pressing plates, and the lower pressing platen is moved up and down to be placed on the heating plates between the pressing plates. In the press device for pressing the cut work piece, the upper and lower heating plates are attached to the pair of pressing platens via a heat insulating material, and the inside of each pressing platen is mounted. A cooling medium passage is formed in the vicinity of the hot platen mounting surface of the hot press machine.