JPH0753839Y2 - Press board holding mechanism of hot press furnace - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot press furnace, and more particularly to a press platen holding mechanism for a hot press furnace which presses a material to be treated in a uniaxially pressurized state.

[0002]

2. Description of the Related Art Conventionally, when heat-compressed products such as laminated wire mesh filters are subjected to molding or diffusion bonding, the treatment material is 11
It is heat-treated while being uniaxially pressed at a high temperature of 00 ° C to 1400 ° C. By the way, conventionally, in a hot press furnace that performs uniaxial pressurization, a press platen and a press rod have a one-piece structure that is machined from a material or welded.

[0003]

[Problems to be solved by the device] However, normally,
The press surface (upper surface) of the processed material is often not horizontal, and when the press rod descends, the press platen makes one-sided contact with the processed material, so a large unbalanced load is generated at the base of the press rod and the press platen. In addition to being a cause of breakage, the treatment material is pressed in a one-sided contact state, so that a laminated wire mesh filter cannot have a uniform thickness.
Further, in order to press the treated material in the one-side contact state, an expensive high-strength material must be used for the press rod itself for the above-mentioned reason, and further, in the one-side contact state, the press rod tilts. Therefore, there is a problem in that the sealability of the seal portion between the furnace body and the press rod is hindered. Therefore, it is an object of the present invention to provide a press plate holding mechanism for a hot press furnace which can solve the above problems by devising a joining structure between a press rod and a press plate.

[0004]

In order to achieve the above object, the present invention provides a press platen holding mechanism of a hot press furnace,
In a hot press furnace that heats a processing material in a uniaxially pressurized state having a press board pressing a processing material and a press rod connected to a press cylinder, and having a through hole having a smaller diameter than the press rod in the ceiling portion, and A connecting tool made of a cylindrical body having a circular recess at the center of the lower surface is provided on the upper surface of the press board, and an annular groove having a diameter smaller than that of the through hole is provided near the tip of the press rod, and the rod and the connecting tool are provided. The through hole is mounted in the annular groove so as to be movable by a predetermined amount.

[0005]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a schematic view of a hot press furnace having a press board holding mechanism according to the present invention. In the figure, 1 is a water-cooled furnace body, 2 is an inner chamber installed in the furnace body 1, and 3 is a furnace. A lower press board 4 penetrating the main body 1 and the inner chamber 2, 4 is a press frame, 5 is a press cylinder provided on the lower surface of the press frame 4, and a press rod 6 of the press cylinder 5 is a furnace main body 1 and an inner cylinder. The chamber 2 is penetrated, and the lower end of the chamber 2 is provided with a press plate 8 by the press plate holding mechanism 7 of the present invention. In addition,
W is a treated material. The operation method of the hot press furnace is the same as the conventional one, and the description thereof is omitted.

FIG. 2 shows a first embodiment of the press board holding mechanism 7 according to the present invention, in which the press rod 6 is held on the press board 8 via a connecting tool 9 in a loosely fitted state. . The connecting tool 9 is provided with a circular recess 9b in the center of the lower surface of the cylindrical body 9a, a concentric through hole 9c is further provided in the ceiling of the circular recess 9b, and the cylindrical body 9a is vertically divided into two parts. It was done.

On the other hand, at the tip of the press rod 6,
An annular groove 6a having a diameter smaller than that of the through hole 9c is provided, the diameter of the lower portion 6b of the annular groove 6a is smaller than the diameter of the circular recess 9b, and the length of the lower portion 6b is circular recess 9b.
Is less than the depth of. The length of the annular groove 6a is longer than the length of the through hole 9c.

Then, each piece of the connecting tool 9 is attached to the press rod 6, and as shown in FIG. 2, a through hole 9c is formed in the annular groove 6a.
Is positioned and is integrated by welding, bolting or the like, and then the connector 9 is integrated with the press board 8 in the same manner as described above. In other words, when the press is waiting,
As shown in FIG.
A gap a is formed between the end face of the press rod 8 and the surface of the press board 8, and a gap b is also formed in the annular groove 6a of the press rod 6 and the outer periphery of the lower portion 6b.

Therefore, when the press cylinder 5 is actuated from this state to start pressing, the press plate 8 first comes into contact with the upper surface of the processing material W. In this case, even if the upper surface of the processing material W is not horizontal, Due to the existence of the gaps a and b, only the press platen 8 abuts, and a large unbalanced load is absorbed without being applied to the press rod 6. After that, the press plate 8 is straightened while being corrected by the end surface of the press rod 6, and the processing material W is pressed in a horizontal plane (FIG. 3).

FIG. 4 shows another embodiment, in which the press board 8 is
Circular recesses 8a, 8b having a diameter larger than the diameter of the press rod 6 are provided in the center thereof to form a connecting portion 8c, a through hole 8d is provided in the connecting portion 8c, and a graphite felt or the like is formed through the through hole 8d. The press board 8 is loosely fitted to the press rod 6 with the bolts 11 via the cushioning material 10. Also in this case, when the press is on standby, the press board 8 compresses the cushioning material 10 by its own weight and descends relatively, and a gap is formed between the connecting portion 8c and the end surface of the press rod 6. Similar to the first embodiment, a large unbalanced load is not applied to the press rod 6 and is buffered during pressing. The same applies to the other cases.

[0011]

As is apparent from the above description, according to the present invention, the press rod connected to the press cylinder of the hot press furnace and the press plate for pressing the surface of the material to be processed are connected in a loosely fitted state. Even if the upper surface of the treated material is tilted, the press rod is not applied with any unbalanced load, that is, the press platen comes into contact with the upper surface of the treated material while performing a kind of buffering action, and then the press platen is pressed by the end surface of the press rod. Press in a horizontal position.

That is, when the press rod descends,
Since a large unbalanced load is not applied to the press rod, there is no damage due to the unbalanced load, and since the press rod does not tilt, the sealing property of the seal portion between the press rod and the furnace body does not suffer.

Further, since the press rod and the press board are divided, the material, size, shape, and processing accuracy of both may be individually examined according to the processing conditions, and the manufacturing cost can be reduced. Moreover, it is possible to deal with various kinds of processing by changing the press board or the like.

[Brief description of drawings]

FIG. 1 is a schematic view of a hot press furnace having a press board holding mechanism according to the present invention.

FIG. 2 is a cross-sectional view showing the first embodiment of the press platen holding mechanism and the press rod in a standby state.

FIG. 3 is a sectional view of a pressed state.

FIG. 4 is a sectional view of a second embodiment of the press board holding mechanism in a pressed state.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Furnace main body, 2 ... Inner chamber, 4 ... Press frame, 5 ... Press cylinder, 6 ... Press rod, 7 ... Press board holding mechanism, 8 ... Press board, 9 ... Connecting tool, a, b ... Gap.

Claims (1)

[Scope of utility model registration request] 1. A hot press furnace for heating a treatment material in a uniaxially pressurized state having a press platen for pressing the treatment material and a press rod connected to the press cylinder, wherein a through hole having a diameter smaller than that of the press rod is provided in a ceiling portion. And a coupling tool formed of a cylindrical body having a circular recess at the center of the lower surface is provided on the upper surface of the press board, and an annular groove having a diameter smaller than that of the through hole is provided near the tip of the press rod, A press board holding mechanism for a hot press furnace, wherein a connecting tool is mounted in the annular groove so that the through hole is movable by a predetermined amount.