JPS60171101A - Structure of member for hot press - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of a frame and a movable platen, which are essential components of a hot press that heats and presses a plate such as plywood, decorative board, fiberboard, particle board, etc.

Normally, in the plate manufacturing process, although not shown, there is a single-stage hot press, in which a pair of hot plates are arranged between the upper and lower frames, and these hot plates can be opened and closed by a movable platen, or as shown in Figure 1. As shown in Figures 2 to 4, multi-stage hot presses in which hot plates are arranged in multiple stages at equal intervals vertically have been mainly adopted, and in recent years, as shown in Figs. 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 Hondogresu 1 has an upper frame 3 and a lower frame 4 arranged opposite to each other via a support 2, and a movable platen 6 that can be raised and lowered by a ram cylinder 5 installed on the lower frame 4. A plurality of heating plates are arranged at equal intervals between the upper frame 3 and the upper frame 3, and after inserting and placing the plate 8 between the heating plates 7, the movable platen 6 is raised and the lowermost Starting with the hot plate 7 located at , the hot plate 7 above it is successively pushed up and the press is closed, and the plate body 8 is heated and pressurized for the required time.

In addition, in FIGS. 2 and 3, the upper cross beam 11 and the lower cross beam 1
2, the left frame 13 and the right frame 14 are arranged opposite each other on the left and right, and the shim 16 of the cylinder 15 provided on the right frame 14 allows the movable platen 17 to freely reciprocate in the left and right direction. Between the movable plates 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. There is. At the four corners of each stage hot plate 20 and movable platen 17 of this horizontal multi-stage hot press 21, a plate nod 22 and a regulating device 23 are arranged as a set, respectively, to regulate the maximum opening. The conveyor 24 conveys the plate to an almost upright state and inserts it between the hot plates 20 of each stage, and as the movable platen 17 moves forward, the hot plates 20 are sequentially contracted and closed to the left to bring the press into a closed state. This prevents variations in the pressing force and thinning of the plate 8 that is heated and pressurized.

Furthermore, the one shown in FIG.
This allows the movable platen 17' to freely reciprocate in the left and right direction, and a linking member 26 is suspended around a rotating wheel 25 that is pivotally supported on the right frame 14, and the left and right movable plates 1 are locked at both ends.
7. Horizontal multi-stage hot press 2 of the Ryomachi motion plate type, in which the parts 7 and 17' can be freely moved toward and away from each other at equal distances, shortening the contraction/closing and expansion cycles.
It is 7.

The single-stage hot press described above is mainly used for manufacturing fiberboard and particle board, and the multi-stage real press 1 and the horizontal multi-stage hot presses 21 and 27 are mainly used for manufacturing plywood and decorative boards. Steam, hot oil, etc. are supplied and discharged inside the plate, and the temperature is adjusted to 120°C depending on the type of plate.
'C to 180°C.

Therefore, the upper and lower frames 3, 4, the left and right frames 13, which are essential components of each stage hot press 1, 21, 27,
14. The movable plates e, 17, 17' are generally hollow and reinforced by beams by welding, and have a closed box-like external shape, but the hot plates 7, 20
Since it is constantly heated by the temperature, thermal expansion strain occurs, which hinders the opening and closing movement of the hot plates 7 and 2o, and causes the plate body 8 to become thick and thin after being heated and pressurized.

For this reason, each frame 3, 4, 13, 14, each movable plate 6, 17'+17' is arranged with rib plates 30 at arbitrary intervals vertically and horizontally, as shown in FIGS. 5 and 6. They are combined in a lattice shape, side plates 31 are arranged on the four circumferential sides, and all the joints are welded 32 to connect each other, and both ends in the pressing direction, that is, in the vertical direction in the multi-stage hot press 1, In addition, in the horizontal multi-stage hot press 21° 27, the lattice-like structure 3 is open at both ends in the left and right direction.
3 to prevent overheating through air and heat insulation.

However, although this lattice-like structure 33 can achieve a cooling effect of 1 degree 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, at the contact end surfaces of the hot plates 7 and 20 and the other end surfaces,
Although a temperature difference occurs during heating, since the joints of the rib plate 30 and the side plate 31 are linearly welded and connected and are integral, there is a difference in temperature in the plane of both ends perpendicular to the opening direction. However, since the coefficients of thermal expansion are different, the contacting end surfaces of the hot plates 7 and 20 will thermally expand more than the other end surface, resulting in stress due to distortion, and the above-mentioned drawbacks cannot be overcome. There wasn't.

In view of the upward slope, the present invention replaces the lattice-like structure 33 with a plurality of steel pipes with both ends open in the pressurizing direction.
The steel pipes are arranged adjacently in parallel to the pressurizing direction, and the adjacent surfaces of the steel pipes located on the hot plate contact side are made free ends by an arbitrary distance in the pressurizing direction, and the remaining adjacent surfaces are interconnected by welding. Embodiments of the present invention will be described below with reference to FIGS. 7 to 12.

First, what is shown in FIGS. 7 to 8 is the pressurizing direction of the multi-stage hot press 1 and the horizontal multi-stage hot presses 21 and 27, that is, the vertical direction in the multi-stage hot press 1,
Further, in the horizontal multi-stage hot press 21° 27, a plurality of steel pipes 40 having the same diameter and the same length with both ends open in the left-right direction are arranged adjacent to each other in the longitudinal direction to form a steel pipe. A structure 41 is formed.

This steel pipe structure 4 usually has a rectangular cross section according to the dimensions of the plate 8, and the adjacent surface 42 of each steel pipe 10 is located on the contact side of the hot plate 7.20. , the eighth
As shown in the figure, the ends are made free by an arbitrary distance in the pressurizing direction, and the remaining adjacent surfaces 42 are connected to each other by welding 43.

Specifically, the contact sides of the hot plates 7 and 20 are the lower side of the upper frame 3 in the multi-stage hot press 1, the upper side of the movable platen 6 and the lower frame 4, and the above-mentioned horizontal multi-stage hot presses 21 and 27. is left frame 13
, or the right side of the movable platen 1τ located on the left side, the movable platen 17 located on the right side, and the left side of the right frame 14.

The lower frame 4 of the multi-stage hot brake δ1, the right frame 14 of the horizontal multi-stage hot press 21, and the left and right frames 13° and 14 of the horizontal multi-stage hot press 27 of the Ryomachi motion plate type are spaced apart from the hot plate 7.20. Due to the location,
All adjacent surfaces 42 may be welded 43, since thermal expansion due to heating effects is avoided to a certain extent.

Next, another embodiment of the steel pipe structure 41 will be described based on FIGS. 9 to 12. For convenience, the same numbers will be given to the parts that have already been explained, and only the essential parts will be explained.

First, in the steel pipe structure 41 shown in FIGS. 9 and 10, a plurality of steel pipes 40 of the same diameter are arranged adjacently, whereas a plurality of steel pipes 44 and 45 of different diameters are combined. According to this steel pipe structure 46, by utilizing the internal space of the large-diameter steel pipe 44, the cylinders 5, 15 for freely opening and closing the movable plates 6, 17, 17' are arranged. can be stored.

Therefore, this steel pipe structure 46 is particularly useful for configuring the lower frame 4 of the multi-stage hot press 1, the right frame 14 of the horizontal multi-stage hot press 21, and the left and right frames 13 and 14 of the horizontal multi-stage hot press 27 of the Ryomachi motion plate type. Are suitable.

Further, while the steel pipe structures 41 and 46 have a rectangular cross section, FIGS. 11 and 12 show a steel pipe structure 47 that has a substantially square cross section. and corresponding to the 8 dimensions of the plate to be heated and pressurized,
Its shape is arbitrary.

According to the invention, therefore, the hot plate 7 can be
, 20 when the plate body 8 is heated and pressurized, the steel pipe structure 44 , 4
6. 47 will be heated under the influence of the temperature of the hot plates 7, 20, but since both ends of each steel pipe 40, 44, 45 in the pressurizing direction are open, the first reason is due to air insulation. Effects can be obtained.

In addition, each steel pipe 40, 44 on the contact side of the hot plates 7, 20
.

Since the adjacent surface 42 of each steel pipe 45 has a free end up to a position where it is not subject to expansion changes due to conduction heating, thermal expansion is caused by each steel pipe 40.
, 44 and 45 in the circumferential direction, and the coefficient of thermal expansion thereof is 1/π compared to the linear derivation in the conventional lattice structure 33.

Therefore, even if a temperature difference occurs at both ends perpendicular to the opening direction of the steel pipe structures 41, 46, 47, the difference in coefficient of thermal expansion is reduced compared to the lattice structure 33, so stress due to strain is reduced. This is a conflict that can significantly reduce the

For this reason, the parallelism of the steel pipe structures 41, 46, and 47 is almost maintained even during heating, so that the problem that occurs conventionally when opening and closing the hot plate 7.20, and the problem that occurs in the plate 8 after heating and pressurizing. This can reduce inconveniences such as thickness and thinness.

Furthermore, compared to the conventional lattice-like structure 33, the number of component parts and welded parts can be reduced, and the processing time can also be shortened.

[Brief explanation of the drawing]

1 to 4 relate to a hot press to which the present invention is applied, FIG. 1 is a side view of a multi-stage hot press, FIG. 2 is a plan view of a horizontal multi-stage hot press, and FIG. Side view,
Figure 4 is a side view of the Ryomachi moving plate type horizontal multi-stage hot press.
Fig. 5 is a plan view showing the conventional device, and Fig. 6 is A-A in Fig. 5.
Fig. 7 is a plan view showing an embodiment of the present invention, Fig. 8 is a view taken from line 13-B in Fig. 7, and Fig. 9 is a view showing another actual flow side of the present invention. 10 is a view taken along the line C--C in FIG. 9, and FIG. 11 is a plan view showing another embodiment of the present invention.
tg12 is a view taken along line D-D in FIG. 11. 1. Multi-stage hot press, 3. Upper frame, 4. Lower frame, 6, 17, 17'... Movable platen, 7.20
・・・Hot plate, 8・Plate body, 13・Left frame, 14・
Right frame, 21...Horizontal multi-stage hot press, 27.
・Horizontal multi-stage hot press with both rotary disks, 40, 44
, 45...Steel pipe, 4L, 46, 47...Steel pipe structure, 42...Adjacent surface, 43...Welding patent applicant Taihei Seisakusho Co., Ltd.

Claims (1)

[Claims] In a hot press with a hot plate and a movable plate placed between opposing frames that can be opened and closed, three steel pipes with both ends open in the pressing direction are arranged adjacently in parallel to the pressing direction. At the same time, the structure of a member for hot pressing is characterized in that the adjacent surfaces of the steel pipes located on the hot plate contact side are made free ends by an arbitrary distance in the pressurizing direction, and the remaining adjacent surfaces are interconnected by welding. .