JPH0339441B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for producing plywood, decorative boards,
Alternatively, in a horizontal multi-stage press that heats and presses a plate to be processed such as a veneer veneer, the fluid cylinder and ram can be moved integrally to accommodate differences in the dimensions of the plate to be processed inserted between hot plates. , relates to the adjustment of the pressurizing point so that the pressurizing point within the vertical plane is located approximately at the center.

Normally, the multistage press that is mainly used in the plywood manufacturing process has a movable platen that can be raised and lowered by a ram cylinder installed in the lower frame, and is equipped with multiple stages of hot plates between the upper and lower frames. After inserting and placing the plate to be processed between the hot plates, the movable platen is raised, and the hot plate above it is successively pushed up, starting with the lowest hot plate, the press is closed, and the press is heated and pressurized for the required time. A processed plate was obtained.

However, in this type of multi-stage press having a plurality of upper and lower heating plates, when supporting each stage of the heating plates, support claws are attached to the four corners, and the support claws are attached to the pillars. A method is adopted in which the ingredients are placed one after the other. Therefore, when determining the thickness of the hot plate at each stage, in addition to the strength required for heating and pressing the plate to be processed, which is the main purpose, also consider the strength that corresponds to the deflection and bending caused by the distance between the supporting points. In order to provide rigidity, the thickness is greater than necessary. Furthermore, arranging hot plates that are thicker and heavier than necessary in multiple stages means that the upper and lower parts of the plate to be processed placed on the hot plate are Not only does this increase the variation in the pressure applied to the treated plate, resulting in poor adhesion and thinning of the processed plate, but also the diameter of the ram cylinder, which is the means for raising and lowering the hot plates at each stage, and the pump that supplies fluid to the cylinder. This caused an increase in the capacity and load on the fluid pressure unit, forcing the multi-stage press to become larger.

For this reason, by adopting a horizontal multi-stage press with hot plates arranged side by side on the left and right, as opposed to a vertical multi-stage press with multiple hot plates arranged above and below, it is possible to correct the variation in pressing force. Attempts have been made to eliminate poor adhesion to treated plates after heating and pressurizing, to reduce the weight of hot plates, or to downsize fluid pressure units, etc. However, at present, there are the following circumstances. It has not yet been put into practical use.

In other words, in a vertical multi-stage press, when multiple cylinders are usually arranged on the lower frame,
By supporting the movable plate so that the rams are positioned approximately at the center at equal intervals across the length and breadth of the movable plate,
Pressure is applied in a well-balanced manner almost at the center of the hot plate. Therefore, the plate to be processed is placed at approximately the center of the hot plate by the pusher that pushes the rear end and intervenes between the hot plates, so that the pressure applied to the plate to be processed during heating and pressurization is reduced. If the point is located approximately in the center, a good pressurization balance will be achieved from the center to the four peripheral parts. Moreover, according to this mechanism, even if the dimensions of the plate to be processed differ, by adjusting the working distance of the pusher each time, it is possible to place the plate at approximately the center of the hot plate, as described above. Good pressurization balance can be obtained.

However, in a horizontal multistage press,
It is not possible to place the plate to be processed on the hot plates arranged vertically in parallel, and the lower end of the plate is supported and inserted almost upright between the hot plates. It becomes impossible to push the lower end of the hot plate higher than the lower end of the hot plate. Therefore, if the dimensions of the plate to be processed differ, the pressure position in the vertical direction, that is, the vertical direction, will be distorted, and the pressure applied at the upper edge of the plate to be processed will vary. This causes problems such as thickening and thinning, and parts that cannot receive an appropriate pressure force peel off.

In view of the above, the present invention is a horizontal multistage press in which a plurality of hot plates that can be opened and closed are arranged in parallel at equal intervals between left and right frames. The cylinder is movable within its vertical plane, and the ram is moved synchronously within the vertical plane behind the movable plate, so that the pressure point is brought to approximately the center position depending on the dimensions of the plate to be processed. An embodiment of an apparatus for directly carrying out the method of the present invention will be described below based on the configuration with reference to the accompanying drawings.

Through a pair of upper and lower cross beams 1 and 2 arranged at arbitrary intervals in the vertical direction and the front-back direction,
Frames 3 and 4 are provided oppositely on the left and right sides, and a ruler 6 is attached to one of the rails 5 laid on the upper cross beam 1. Between the rails 5 are a plurality of heat plates 9 and a movable platen 10, each having a movable member 8 on either side of which is provided with an engaging portion 7 that engages with a ruler 6, protruding from both sides of the upper part. It is suspended.

Next, the hot plate 9 is provided with a supply port 11 at the top and a discharge port 12 at the bottom in order to supply and discharge a heating medium such as hot oil or steam to the passage formed inside the hot plate 9. An insertion guide 14 having a sharp tip and a substantially triangular cross section is formed on the side surface of the plate 13 located on the carry-in side.

In addition, the left, right, upper and lower parts of the hot plate 9 and the movable plate 10,
Or both upper and lower sides as shown in the figure, that is, the plate to be processed 1
3. Near the four corners that will not impede the loading and unloading of
The brackets 15 are attached to each other, and a gate-shaped regulating tool 16 is bridged between the adjacent brackets 15, one end of which is attached to the bracket 15, and the other end is a free end, so that the regulating tool 16 is closed when the press is opened. The free end is engaged with a bracket 15 to maintain equal left and right spacing between the hot plate 9 and the movable plate 10.

Next, a pair of notch grooves 17 are bored at an arbitrary interval in the lower part of the hot plate 9, and a plurality of rolls are formed below the grooves 17 for carrying in, supporting, and carrying out the plate 13 to be processed. The conveyor 18 is arranged between the machine frames 19 on the lower cross beam 2. Further, a pair of push-up bodies 20 are inserted into the pair of cutout grooves 17 and have a length approximately corresponding to the length of the hot plates 9 of all stages when the press is opened, so that they can freely move in and out of the conveyance surface of the conveyor 18.

Further, a pair of left and right sliding guides 21 are attached to the one frame 4 facing each other at a constant interval in the vertical direction, and a pair of left and right sliding guides 21 are fitted between the left and right sliding guides 21. Combined sliding plate 22
, a plurality of fluid cylinders 23 are arranged at approximately equal intervals.
is inserted. On the other hand, a pair of left and right sliding guides 24 are also provided on the back of the movable platen 10 in the vertical direction.
The number of rams 25 are mounted opposite to each other, and a sliding plate 26 is fitted into each of the left and right sliding guides 24 to hold the rams 25 inserted therein.

Next, after drilling through the vicinity of both ends of the sliding plate 22 on the side of the frame 4, a female screw is formed in the bored portion, and a stepping screw 28 whose upper and lower portions are held by the guide plate 27 is screwed into the hole. By rotating the feed screw 28 in the forward and reverse directions, the sliding plate 22 can be moved upwardly and downwardly.

In addition, the sliding plate 2 is placed along the left and right sliding guide 21.
2 may be moved up and down by means such as rack and pinion movement or fluid movement as shown in the fourth figure. That is, a pair of fluid cylinders 29 for vertical movement are pivotally supported near both ends of the sliding plate 22, and the tip end of each piston rod 30 is pivotally supported on the frame 4.

Further, FIG. 5 shows a case in which in addition to vertical movement within a vertical plane, horizontal movement is also performed. That is, the inside of the sliding plate 22 is cut out into a rectangular shape, and vertical sliding guides 31 having a fixed length in the lateral direction are formed in the upper and lower parts of the sliding plate 22, and a plurality of fluid cylinders 23 are arranged between the vertical sliding guides 31. Fit them together using appropriate fittings. Further, screw rods 32 having at least the length of the vertical sliding guide 31 and having reverse screws carved into each other with the center portion as a boundary are supported on the sliding plate 22, and are screwed into each screw portion. A pair of moving pieces 33 are attached to the fittings of the fluid cylinders 23, and each fluid cylinder 2 is moved by rotating the screw rod 32.
3 can be freely approached and separated in the horizontal direction. At this time, although not shown, each ram 25 also moves from the sliding plate 22 to follow the horizontal movement of the fluid cylinder 23.
Similarly to the above case, vertical sliding guides are formed on the upper and lower sides inside the sliding plate 24, and the upper and lower sliding guides are fitted through fittings so that they can move toward and away from each other.

Note that the mutual movement of the fluid cylinders 23 toward and away from each other may optionally be replaced by fluid movement, rack and pinion movement, or the like.

Next, the effect will be explained.

First, the fluid cylinder 23 is operated and the ram 25
When reduced, the movable platen 10 and the heating plates 9 of each stage are moved between the upper cross beams 1 by the moving member 8, while one side is maintained in a parallel state by the engagement movement of the ruler 6 and the engaging part 7. , moves along the rail 5 to the right in the figure. During this movement, the free ends of the restricting tools 16 from the hot plate 9 located at the left end come into contact with the brackets 15 of the adjacent hot plates 9 at their four corners, and the maximum opening of the restricting devices 16 is sequentially restricted. The left and right spacing between the hot plates 9 is maintained evenly, and the press is in an open state.

Next, the plates 13 to be processed are carried in all at once from a loader located on the carry-in side between the hot plates 9 of each stage, which are maintained at a required temperature by being supplied with a heating medium. The loaded plate 13 to be processed is supported at its lower end by the drive of the conveyor 18, and is conveyed to the center position in the front-rear direction of the hot plates 9 of each stage, and stopped at that position.

At this time, the push-up body 20 is inserted into the notch groove 17 from below the conveying surface.
When it is protruded to the inside, the plate 13 to be processed on the conveyor 18 is lifted up and inserted between the hot plates 9 in a substantially upright position. Under this condition, the fluid cylinder 23
When the ram 25 is extended by the operation, the press is closed, contrary to the above description, the plate 13 to be processed is heated and pressurized, and then transported to the unloader.

However, the plate to be processed 1 to be carried in next time
3 have different dimensions, for example, if the dimensions become smaller only in the vertical direction, as shown in the left half of FIG. 3 to the right half of FIG.
The position of each fluid cylinder 23 in the vertical direction is adjusted by the screw movement of the sliding plate 2 with respect to the sliding guide 21 or by the operation of the fluid cylinder 29 for vertical movement.
Adjustment is made by fitting and sliding 2. At this time, the sliding plate 26 fits and slides between the sliding guides 24 following the vertical movement of the fluid cylinder 23, so the position of the ram 25 is also adjusted synchronously, and the position of the plate 13 to be processed is adjusted. The pressurizing point will reach approximately the center position in the vertical direction.

Furthermore, as shown in the left half of FIG. 5 to the right half of FIG. In addition to vertical movement in the vertical plane, the fluid cylinder 23 as well as the ram 2
5 in an integrated manner in the lateral direction. That is, when the screw rod 32 is rotated, the pair of moving pieces 33
will approach each other on each reverse screw, so
Each fluid cylinder 23 approaches the same distance within the notch of the sliding plate 22 along the vertical sliding guide 31,
Its position is adjusted according to the reduced size of the plate 13 to be processed. In addition, in synchronization with this, the Rammy 25 also follows along the vertical sliding guide and its position is adjusted, so that the pressure point can be brought to approximately the center position in the lateral direction of the plate 13 to be processed. can.

As described above, according to the present invention, in a horizontal multi-stage press in which a plurality of heat plates that can be opened and closed are arranged in parallel at equal intervals between left and right frames, the heat plates are arranged on the frame side. The fluid cylinder is movable up and down, left and right, or both up and down as well as left and right within its vertical plane, and the ram is moved synchronously within the vertical plane behind the movable platen, so that there is no space between the hot plates at each stage. According to the plate to be processed which is inserted in an almost upright state, the pressure point is brought to the approximately central position, so that the pressure point is always approximately at the center of the plate to be processed, and a good pressure balance is maintained. As a result, it is possible to eliminate problems such as thickening and thinning of the processed plate due to misalignment of the pressurizing point, and peeling that mainly occurs on the four peripheries. It is possible to heat and press a plurality of types of plate bodies to be processed.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an embodiment of the horizontal multi-stage press, FIG. 2 is a side view of the same, FIG. 3 is an operational explanatory diagram showing an embodiment of the apparatus of the present invention, and FIGS. FIG. 7 is an operation explanatory diagram showing another embodiment of the invention device. 1...Upper crossbeam, 4...Frame, 5...Rail,
8...Movable member, 9...Hot plate, 10...Movable plate,
16...Restrictor, 18...Transfer conveyor, 21,
24... Left and right sliding guide, 22, 26... Sliding plate, 23... Fluid cylinder, 25... Ram, 31
...Vertical sliding guide.

Claims (1)

[Scope of Claims] 1. A fluid cylinder disposed on the frame side in a horizontal multi-stage press in which a plurality of heat plates that can be opened and closed are arranged in parallel at equal intervals between left and right frames. is movable within its vertical plane, and the rams are moved synchronously within the vertical plane behind the movable platen, so that the rams can be moved synchronously within the vertical plane of the movable platen, depending on the dimensions of the plate to be processed that is inserted almost vertically between the hot plates of each stage. , a method for adjusting the pressure point of a horizontal multi-stage press, characterized by bringing the pressure point almost to the center position. 2 Frames are installed on the left and right through a pair of upper and lower cross beams arranged at arbitrary intervals, and multiple heat plates and movable plates are moved in the left and right direction via moving members on the rails laid on the upper cross beams. In addition, near the four corners of the adjacent hot plate and the movable plate, regulating devices are installed to maintain equal spacing between the hot plates when the press is opened, and below the hot plate is a A horizontal multi-stage press, characterized in that a conveyor for conveying a plate is provided, and a fluid cylinder and a ram can be integrally moved along a sliding guide attached to the frame and movable platen. Pressure point adjustment device.