JPH0414601B2 - - Google Patents

Description

Detailed Description of the Invention "Field of Industrial Application" The present invention applies to frames and movable plates that are essential components of hot presses that heat and press plates such as plywood, decorative boards, fiberboards, and particle boards. It's about structure.

``Prior art'' Usually, in the plate manufacturing process, although not shown in the drawings, a single-stage hot press is used, in which a pair of hot plates is arranged between upper and lower frames, and these hot plates can be opened and closed by a movable plate. Alternatively, as shown in Fig. 9, a multi-stage hot press in which the number of hot plates is arranged in multiple stages at equal intervals vertically has been mainly adopted, and in recent years, as shown in Fig. 10, a A horizontal multi-stage hot press in which multiple hot plates are arranged side by side in the horizontal direction has been proposed.

That is, the former multi-stage hot press 1 is
The upper frame 3 and the lower frame 4 are installed opposite each other via
A movable platen 7 can be raised and lowered by a ram 6 of a fluid cylinder 5 installed on a lower frame 4, and a plurality of heat plates 8 are arranged at equal intervals between the movable platen 7 and the upper frame 3. After inserting and placing the plate 9 between these hot plates 8, the movable plate 7 is raised,
Starting with the hot plate 8 located at the lowest position, the hot plates 8 above it are successively pushed up to close the press, and the plate body 9 is heated and pressurized for a required period of time.

In addition, in FIG. 10, a left frame 13 and a right frame 14 are installed opposite each other on the left and right through an upper cross beam 11 and a lower cross beam 12, and a movable platen 17 is moved by a ram 16 of a cylinder 15 provided on the right frame 14. It can freely reciprocate in the left and right direction, and on the other hand, the left frame 1
3 and the movable platen 17, a plurality of hot plates 20 with movable members 19 protruding from both sides of the upper part are suspended from rails 18 installed on the upper cross beam 11, forming the latter horizontal multi-stage hot press 21. ing. The hot plate 20 and movable platen 1 of each stage of this horizontal multi-stage hot press 21
A pair of brackets 22 and restrictors 23 are arranged at each of the four corners of the plate 7 to regulate the maximum opening, and a conveyor 24 disposed below conveys the plate in an almost upright state. heating plate 2 on each stage
0, and as the movable platen 17 moves forward, the hot plate 20 is sequentially retracted and closed to the left to bring the press into a closed state. This was prevented.

The single-stage hot press described above is mainly used for manufacturing fiberboard and particle board, and the multi-stage hot press 1 and the horizontal multi-stage hot press 21 are mainly used for manufacturing plywood and decorative boards. Steam, hot oil, etc. are supplied and discharged, and the temperature is maintained within the range of 110°C to 180°C, depending on the type of plate.

Therefore, the upper and lower frames 3, 4, left and right frames 13, 14, and movable plates 7, 17, which are essential structural members of each multi-stage hot press 1, 21, are generally reinforced by welding inside their hollow interiors with beams. It is constructed as a closed box shape,
Since the hot plates 8 and 20 are constantly heated at the same temperature, thermal expansion distortion occurs, which may impede the opening and closing movement of the hot plates 8 and 20 or cause the plates to become thick or thin after being heated and pressurized. I was getting used to it.

Therefore, as shown in FIGS. 11 and 12, each frame 3, 4, 13, 14 and each movable platen 7, 17 are combined with rib plates 30 in a lattice shape at arbitrary intervals vertically and horizontally. Furthermore, side plates 31 are placed on the four circumferential sides.
are arranged, and all of the joint parts are welded 32 to connect each other, and both ends in the pressurizing direction, that is, both ends in the vertical direction in the multistage hot press 1, and in the left and right directions in the horizontal multistage hot press 21. is formed in a lattice-like structure 33 which is in an open state, and heating is prevented by air insulation.

However, although this lattice-like structure 33 can provide a certain degree of cooling effect compared to a box-like structure, it cannot eliminate the stress generated during heating. Therefore, both ends of the lattice-like structure 33 in the opening direction, that is, the heating bodies 8 and 20
A temperature difference occurs between the contact end surface and the other end surface during heating, but since the joints of the rib plate 30 and the side plate 31 are linearly welded and connected and are integral, the temperature difference occurs at right angles to the opening direction. The thermal expansion coefficients are different in the planes of both ends, and the contact end surfaces of the hot plates 8 and 20 expand thermally more than the other end surface, resulting in stress due to distortion, which still eliminates the above-mentioned drawbacks. I couldn't do it.

``Problems to be Solved by the Invention'' In view of the above, the present invention has been developed to provide a frame and a movable platen, which are essential components of a hot press, from the hot plate contact side so as to absorb the expansion stress generated during heating. A groove of arbitrary length is carved inward.

``Example'' Below, an example of the device of the present invention will be described based on the accompanying drawings, starting with the configuration.

First, the first embodiment shown in FIGS. 1 and 2 includes the multi-stage hot press 1 and the horizontal multi-stage hot press 2.
1, that is, the vertical direction in the multi-stage hot press 1, and the left-right direction in the horizontal multi-stage press 21, the lattice-like structure 33 described above is arranged with both ends open.
In the rib plates 30 and side plates 31 forming each lattice 34 portion of this lattice-like structure 33, grooves 35 of arbitrary length are carved inward from the contact side of the hot plates 8 and 20. .

Next, the second embodiment shown in FIGS. 3 and 4 includes the multi-stage hot press 1 and the horizontal multi-stage hot press 2.
A plurality of steel pipes 3 having the same diameter and the same length with both ends open in parallel to the pressurizing direction of 1.
6 are arranged adjacent to each other in the longitudinal direction, and all adjacent surfaces are welded 32 to form a steel pipe structure 37.
was formed.

This steel pipe structure 37 usually has a rectangular cross section depending on the plate size, and each steel pipe 3
A groove 35 of an arbitrary length is carved every 6.

Furthermore, in the steel pipe structure 37 of the second embodiment, side plates are arranged around the outer periphery of each steel pipe 36 located on the outside, as shown in FIGS. 5 to 8.

Of these, in the third embodiment shown in FIGS. 5 and 6, when the steel pipe structure 37 is constructed by arranging the steel pipes 36 adjacently with their phases shifted from each other, the outer steel pipe 36 is Since there is only one weld 32 surface for the steel pipe 36, in order to mutually reinforce and connect the steel pipes 36, there is a strip-shaped hot plate 8, 20 between the outer peripheries of the steel pipes 36 located on the outside. A side plate 38 having a length from the non-contact surface to the groove 35 carved in the steel pipe 36 is placed as a bridge and welded 32 is applied.

In addition, in the fourth embodiment shown in FIGS. 7 and 8, the side plates 38 in the third embodiment were strip-shaped and were disposed as bridges between the outer steel pipes 36, whereas the side plates 38 were long and steel pipes. A side plate 39 having the same length as 36 is arranged so as to cover all the outer peripheries of the steel pipes 36 located on the outside, and each steel pipe 36 and the steel pipe 36 and the side plate 3
all adjacent surfaces of 9 are interconnected by welding 32;
Further, a groove 35 of an arbitrary length is cut in each steel pipe 36 and side plate 39 from the side in contact with the hot plates 8 and 20 toward the inside. According to this, since the contact area with the hot plates 8, 20 increases during pressurization, it is possible to reduce strain caused by bending stress of the hot plates 8, 20.

In each of the above embodiments, the contact sides of the hot plates 8 and 20 are specifically listed as the lower side of the upper frame 3 of the multi-stage hot press 1, the upper side of the movable platen 7 and the lower frame 4, and the upper side of the horizontal multi-stage hot press 1. 21, the right side of the left frame 13, the left side of the movable platen 17, and the right frame 14. Further, in the horizontal multi-stage hot press 21, when the fluid cylinder 15 is also arranged on the left fly 13 to form a double movable plate type, the right side of the movable plate located on the left side also corresponds to this.

However, among these, the lower frame 4,
Right frame 14, double movable plate type left and right frames 1
3 and 14, since they are arranged apart from the hot plates 8 and 20, thermal expansion due to heating action is avoided to some extent, so it is not necessary to form the grooves 35.

In addition, when configuring the steel pipe structure 37, it is possible to use steel pipes 36 that are arranged adjacent to each other to have the same diameter, or to use steel pipes 36 that have different diameters, or to make the arrangement phase the same, or to shift them from each other. It is optional to do so.

Furthermore, the strip-shaped side plate 3 shown in FIGS. 5 and 6
8 may be made the same length as the steel pipe 36, like the elongated side plate 39 shown in FIGS. It is also optional to set the length shorter than the length of the steel pipe 36, but if the length of the strip-shaped side plate 38 is the same as the length of the steel pipe 36, as in the former case, the length of the strip-shaped side plate 38 is also engraved on the steel pipe 36. A groove similar to the groove 35 shall be carved.

"Effect" According to the present invention, when the press is closed and the plate 8 is heated and pressurized, each member that comes into direct contact with the hot plates 8 and 20 is heated under the influence of the temperature of the hot plates 8 and 20. However, since both ends of each member in the pressurizing direction are open, the first effect is air insulation.

In addition, each member on the contact side of the hot plates 8 and 20, that is, the rib plate 3 of each lattice 34 portion constituting the member.
0. Grooves 35 are cut in the side plate 31 or each steel pipe 36, and furthermore, in each steel pipe 36 and the side plates 38 and 39, to a position that is not subject to expansion changes due to conduction heating, so that thermal expansion occurring in each member is is absorbed into the groove 35 portion. Therefore, even if a temperature difference occurs at both ends perpendicular to the opening direction of each member, stress due to strain can be avoided.

For this reason, the parallelism of each member is maintained even during heating, so the hot plate 8, which was generated conventionally,
This can reduce inconveniences such as problems when opening and closing the plate body 9 and thickness and thinness that occur in the plate body 9 after heating and pressing.

Furthermore, as shown in the second and third embodiments, if each member is made of a steel pipe structure 37, the number of parts and welded parts can be reduced, and machining time can also be shortened. It also has effects.

[Brief explanation of drawings]

1 is a plan view showing a first embodiment of the device of the present invention, FIG. 2 is a view taken along the line A-A in FIG. 1, and FIG. 3 is a plan view showing a second embodiment of the present invention. Figure 4 is the third
FIG. 5 is a plan view showing the third embodiment of the present invention, FIG. 6 is a view taken along the C-C line in FIG. 5, and FIG. 7 is a plan view showing the third embodiment of the present invention. A plan view showing the fourth embodiment,
8 is a view taken along line D-D in FIG. 7, FIG. 9 is a side view of a multi-stage hot press to which the present invention is applied, and FIG.
The figure is a side view of the same horizontal multi-stage hot press, FIG. 11 is a plan view showing a conventional apparatus, and FIG. 12 is a view taken along the line E--E in FIG. 11. 1...Multi-stage press, 3...Upper frame, 4...
Lower frame, 7, 17... Movable plate, 8, 20...
Hot plate, 9...Plate body, 13...Left frame, 14...
...Right frame, 21...Horizontal multi-stage hot press,
30... Rib plate, 31, 38, 39... Side plate, 3
2... Welding, 33... Grid structure, 34... Grid, 35... Groove, 36... Steel pipe, 37... Steel pipe structure.

Claims (1)

[Scope of Claims] 1. In a hot press in which a hot plate and a movable plate are arranged between opposing frames and can be opened and closed, side plates are provided on the four circumferential sides of rib plates that are combined in a lattice shape at arbitrary intervals vertically and horizontally. are arranged and each joint is welded to form a lattice-like structure with openings at both ends in the pressurizing direction.Furthermore, the rib plate and side plate forming each lattice part of this lattice-like structure are provided with a hot plate contact side. A structure of a member for hot pressing, characterized in that a groove of an arbitrary length is carved inward from the center. 2. In a hot press with a hot plate and a movable plate placed between opposing frames that can be opened and closed, a plurality of steel pipes with both ends open in the pressing direction are arranged adjacently in parallel to the pressing direction. A structure of a member for hot pressing, characterized in that all adjacent surfaces are welded and connected to each other, and a groove of arbitrary length is carved in each steel pipe from the hot plate contact side inwardly. 3. In a hot press with a hot plate and a movable plate placed between opposing frames that can be opened and closed, a plurality of steel pipes with both ends open in the pressing direction are arranged adjacently in parallel to the pressing direction. At the same time, a side plate is placed around the outer periphery of each steel pipe located on the outside, and the steel pipes and all adjacent surfaces of the steel pipe and side plate are welded and connected to each other. A structure of a member for hot pressing, characterized in that a groove of an arbitrary length is carved in one direction.