JP2976258B2 - Hot press insulation mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting a heat insulating material provided between a movable platen and a hot plate in a hot press.

[0002]

2. Description of the Related Art In recent years, a laminate of a printed wiring board in which a wiring board and a wiring pattern are etched by using a hot press has been manufactured. In this hot press, a plurality of hot plates arranged vertically in parallel are provided between a movable plate provided on a cylinder plate of a cylinder device and an upper plate arranged opposite thereto, and a product is inserted between the hot plates. This is configured to clamp this.

[0003] This hot plate has claws to be placed on each step of the step plate located on both sides of the guide frame of the hot press,
The length of the pawl is changed according to the distance between the opposing step portions of the step board, and the upper hot plate is lifted from the predetermined mounting position in order from the lower hot plate with the rise of the movable plate. Is available.

A heat insulating material is interposed between the movable platen and the lowermost hot plate so that heat from the hot plate does not escape to the movable platen. As shown in FIG. 3, one or a plurality of the heat insulating materials 10 are fitted in a frame called a grid 11,
In order to be sandwiched between the hot plate 12 and the movable plate 13, the members are fixed by fastening with bolts 15 via brackets 14 projecting from the side portions of both members.

[0005] The heat insulating material is made of a resin material having good planar accuracy, that is, a material made of a glass fiber base and a high heat resistant polymer as a binder, and uniform surface pressure from the movable platen to the hot plate. Is required.

[0006]

Therefore, the flatness of the heat insulating material is 0.1 mm to 0.05 mm, preferably 0.0 mm.
It is less than 2 mm, the coefficient of friction of the heat insulating material against the movable plate becomes small, and by repeating the pressing work,
Because the thermal insulation jumps out of the movable board little by little due to thermal expansion and thermal deformation due to thermal expansion and contraction of the thermal insulation, a new work has been added to periodically loosen bolts and lift the hot plate to correct the thermal insulation displacement. Has a loss time.

[0007] In view of such circumstances, an object of the present invention is to provide a heat-insulating material mounting structure for a hot press that prevents the heat-insulating material from shifting.

[0008]

SUMMARY OF THE INVENTION To achieve the above object, the present invention provides a method for hot pressing a heat insulating plate or a single heat insulating plate fitted in a grid by means of a biasing means for suppressing horizontal displacement. A step board for mounting a plurality of hot plates at a predetermined interval between the movable platen and an upper plate facing the movable platen is mounted on the movable platen so as to be positioned on both sides of the movable platen. It is characterized in that it is erected on a base of a hot press, and a gap is formed between the upper surface of the movable platen and the lowermost hot plate placed on the step plate.

[0009]

According to the above construction, the thermal expansion and contraction of the hot plate are repeated by repeating the pressing operation of the hot press. However, a gap is provided between the movable platen and the heat insulating material or the outer peripheral portion of the heat insulating material. Of the heat insulating material is easily corrected without accumulating.

[0010]

An embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a front view showing a heat insulating material mounting structure of a hot press 1 according to the present invention, and FIG. 2 is a view similar to FIG. 1 showing another embodiment.

In FIG. 1, a movable platen 2 is mounted on a cylinder ram of a cylinder device (not shown) so that a step plate 3 erected on a base of a hot press 1 is located on both sides of the movable platen 2. Are located in This step board 3,3
Is provided with steps 4 on the stairs at predetermined intervals at positions facing each other, and a plurality of hot plates 5 arranged in parallel between the movable platen 2 and an upper plate (not shown) facing the movable platen 2. Place at predetermined intervals. Claws 6 project from both sides of the hot plate 5, and the length of the claw 6 of the hot plate is opposite to that of the plate 3 so that the claw 6 is placed on the step 4 of the plate. It differs according to the distance between each step.

[0012] Therefore, as the movable platen 2 rises, the upper and lower hot plates 5 are sequentially lifted and stacked, so that the products placed between the hot plates can be clamped and pressed. The step plate 3 is attached to a guide column 7 which is a part of a base of the hot press here. Further, the step plate may be provided on the guide frame itself integrated with the base of the hot press.

Since the lowermost heat plate 5a absorbs heat by the heat insulating material 10 when the movable platen moves up and down, another heat plate 5b is provided on its upper surface.
Is abutted. As a result, the same amount of heat as the amount of heat supplied from the other upper heating plate 5 is uniformly transmitted to the product.

Further, in the present invention, the movable platen 2 is moved from the hot plate 5a.
The heat insulating element is formed by a heat insulating plate 10a or a single heat insulating plate 10b in which one or a plurality of heat insulating plates are fitted in a rectangular grid 8 in order to prevent heat from being conducted.
Although the heat insulating element covers almost the entire upper surface of the movable platen 2, in the heat insulating plate 10 a of FIG. 1, both sides of the grid 8 and the side surfaces of the movable platen 2 are aligned, and the side surfaces of the grid 8 are movable. It is held down by a leaf spring 9 protruding from the upper side of the board 2. The leaf spring 9 serves as an urging means for suppressing the horizontal movement so that the heat insulating plate 10a does not protrude from the movable platen 2.

Similarly, in FIG. 2, the leaf spring 9 is pressed against the side surface of the heat insulating plate 10b. The leaf spring 9 can be attached to the hot plate so as to protrude downward from the lower side surface of the hot plate 5a instead of being attached to the movable platen 2 as described above.

In the present invention, a gap A is provided between the lowermost hot plate and the heat insulating element in parallel with the provision of the leaf spring 9 for suppressing the deflection of the heat insulating element. For this purpose, the height of the step portion 4 of the step plate on which the claw portion 6 projecting to the side of the lowermost hot plate 5a may be set. That is, the height of the step is determined so that the surface of the heat insulating material of either the heat insulating plate 10a or the single heat insulating plate 10b and the bottom surface of the hot plate 5a are separated by, for example, about 2 mm. Thereby, since the heat insulating element on the movable plate forms a gap between the heat insulating plate and the hot plate, the phenomenon of displacement of the heat insulating material can be eliminated.

[0017] The displacement phenomenon of the heat insulating material occurs in the process described below. That is, when the heat insulating material is divided and mounted on the grid, the load (pressing force) is not applied to the entire surface of the heat insulating material because the load is applied to the product area at the time of press pressing. Therefore, when the heating step is started in this state, the hot plate is heated, and the heat insulating material also gradually rises in temperature by conduction of heat, causing thermal expansion. At this time, the deformation (displacement) of the heat insulating material freely extends in a direction in which a load is small (a direction in which the heat is not pressed), and radially deforms as if the center of the hot plate is a base axis.

Next, in a cooling step, the hot plate is cooled and the heat insulating material is gradually cooled by heat conduction and contracts. In the next step, the press is released when the hot plate is cooled. The load on the insulation is eliminated. At this time, the heat insulating material has not yet fallen to the initial temperature of the cycle, and cooling and shrinkage in a no-load state progress. Naturally, since there is no load, the shrinkage is deformed toward the center with the center of the heat insulating material as a base axis. Therefore, when the heat insulating material is cooled to the initial temperature, the heat insulating material is displaced from the center of the hot plate to the outside, and the heat insulating material is pushed out each time this cycle is repeated. .

However, according to the structure of the present invention, heat conduction occurs in the heat insulating material only when the movable platen is moved up and down. However, a preparatory step until the hot plate is sufficiently heated and maintained at a predetermined temperature is performed. In the cooling process in which the movable plate is lowered and the hot plate is placed at the original position, the heat insulating material and the hot plate are completely separated from each other, so that heat conduction is almost eliminated. Therefore, there is no deviation that the heat insulating material is displaced or the grid frame is damaged,
Conventionally, the position of the heat insulating material is corrected every two to three months, but such a work can be omitted.

[0020]

As is apparent from the above description,
According to the heat insulating material mounting structure of the present invention, a gap is formed between the heat plate and the heat insulating material on the movable platen and the lowest heat plate, and heat conduction occurs only when the movable platen is moved up and down. So that
Eliminates the risk of thermal insulation shifting due to repeated hot pressing operations, eliminating the need for work to correct the position of the thermal insulation and enabling the use of thermal insulation with a high degree of flatness to equalize the surface pressure of the hot plate. It is very effective.

[Brief description of the drawings]

FIG. 1 is a partial sectional front view of a heat insulating material mounting structure of a hot press showing an embodiment according to the present invention.

FIG. 2 is a partial sectional front view of a heat insulating material mounting structure similar to FIG. 1 showing another embodiment according to the present invention.

FIG. 3 is a schematic view showing a conventional heat insulating material mounting structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hot press 2 Movable board 3 Step board 4 Step section 5 Hot plate 6 Claw section 7 Guide pillar 8 Lattice 9 Leaf spring 10 Heat insulation material

Claims (1)

(57) [Claims] A heat insulating plate or a single heat insulating plate fitted in a lattice is mounted on a movable plate of a hot press via a biasing means for suppressing horizontal displacement, and faces the movable plate. Step plates for mounting a plurality of hot plates at predetermined intervals between the upper plate and the hot plate are erected on a base of the hot press so as to be located on both sides of the movable plate, and an upper surface of the movable plate A heat insulating material mounting structure for a hot press, wherein a gap is formed between the lowermost hot plate placed on the step board and the lowermost hot plate.