JPH0339443B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for producing plywood, decorative boards,
Alternatively, the present invention relates to a method and an apparatus for smoothly taking out a processed plate interposed between hot plates after heating and pressing onto a conveyor in a horizontal multi-stage press that heats and presses a plate to be processed such as a veneer veneer. .

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 multiple upper and lower heating plates, in order to support each stage of the heating plates, support claws are attached to the four corners, and these support claws are attached to the supports in the form of a ladder step. A method is adopted in which the components are placed one after another on a support. 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. Taking this into consideration, it is thicker than necessary in order to provide rigidity. 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 pressure applied to the treated plate, resulting in poor adhesion and thinning of the treated plate, but also the diameter of the ram cylinder, which is the means to raise and lower the hot plates at each stage, and the capacity of the pump that supplies fluid to the cylinder. This caused an increased burden on the fluid pressure unit, forcing the multi-stage press to be larger.

For this reason, by adopting a horizontal multi-stage press with hot plates arranged side by side in the left-right direction, as opposed to a vertical multi-stage press with multiple hot plates arranged above and below, it is possible to correct the variation in pressurizing force. Attempts have been made to eliminate poor adhesion to treated plates after heating and pressurizing, to reduce the weight of hot plates, and to downsize fluid pressure units, but these have not yet been put into practical use due to the following reasons. It has not yet been reached.

That is, in a vertical multi-stage press, the rear end of the plate to be processed is pushed by a pusher interposed between the hot plates, and the plate is placed approximately in the center on the hot plate, and the processed plate is heated and pressed. The body is pushed by a pusher from a substantially central position on the hot plate to a removal position on the unloader side. Therefore, the plate to be processed is always in a position suitable for heating and pressing, and during heating and pressing,
Even if the wood resin contained in the board or the adhesive applied to the board were to leak and adhere to the hot plate, and the treated board adhered to the hot plate, the material to be heated and pressurized would still be damaged. If the treated plate is thin, it will warp more easily after heating and pressurizing than thicker plates, resulting in clogging between the hot plates, but the pushing action of the pusher will release the tightness and the clogging. Become.

However, in a horizontal multistage press,
Since the lower end of the plate to be processed protrudes outside the hot plate, it cannot be heated and pressurized appropriately, and if the above-mentioned close contact or clogging occurs, it cannot be removed from the hot plate. It was not possible to remove the processed plate.

In view of the above, the present invention is 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 frames arranged oppositely on the left and right sides. Each pushing body is inserted between the plates by lowering a connecting beam, and the treated plate body interposed between the hot plates is pushed down. Below is an example of an apparatus for directly carrying out the method of the present invention. The structure will be explained based on the attached 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.

A plurality of fluid cylinders 11 are installed on one of the frames 3, and the tips of their rams 12 are attached to the back of the movable platen 10, so that the hot plate 9 and the movable platen 10 can freely move in the left and right directions.

Next, the hot plate 9 is provided with a supply port 13 in the upper part and a discharge port 14 in the lower part 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 16 having a substantially triangular cross section is formed on the side surface of the plate body 15 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
5 near the four corners that will not impede the loading and unloading.
The brackets 17 are respectively attached, and gate-shaped ready-made tools 18 are bridged between these adjacent brackets 17, one end of which is attached to the brackets 17 and the other end is a free end, so that the ready-made tools 18 are attached when the press is opened. The free ends of the brackets 17 are engaged with the brackets 17 to maintain equal left and right spacing between the hot plate 9 and the movable plate 10.

Next, a pair of notch grooves 19 are bored at an arbitrary interval in the lower part of the hot plate 9, and below the notch grooves 19, the plate body 15 to be treated is carried in and supported, and the treated plate body after being heated and pressurized. A transport conveyor 21 consisting of a plurality of rolls for carrying out 20 is disposed between the machine frames 22 on the lower cross beam 2.

Further, a pair of push-up bodies 23 are inserted into the pair of notch grooves 19 and have a length approximately equivalent to the length of the hot plates 9 in all stages when the press is opened, so that they can freely move in and out of the conveyor surface of the conveyor 21. , a screw movement, a rack and pinion movement, a fluid movement, or a crank lever system using a fluid movement as shown in the drawings. Specifically, a push-up fluid cylinder 25 is fixed to a support frame 24 horizontally suspended between the lower cross beams 2, and one end of an arm 27 is pivotally supported at the tip of the piston rod 26.
The other end of this arm 27 has a bearing 28 between the lower cross beams 2.
A lever 30 is fitted to each end of the operating shaft 29, and the tip of the lever 30 is connected to the pair of push-up bodies 2.
It is pivoted to one end of 3. Note that a lever 30 is also pivotally supported at the other end of this push-up body 23 to regulate the balance elevation.

Furthermore, at least one pair of connecting beams 31 approximately corresponding to the length between the left and right frames 3 and 4 are arranged on the upper part of the hot plate 9 by a screw movement, a rack and pinion movement, a fluid movement, or the push-up movement. It is arranged so that it can be raised and lowered by a crank lever system that utilizes fluid motion similar to that of the body 23.

That is, the tips of the piston rods 33 of the connecting beam fluid cylinders 32 fixed to the upper surfaces of the left and right frames 3 and 4 are pivoted to the lower link 34, and both ends of the lower link 34 are connected to a pair of pin connections 35. A dogleg-shaped arm 36 pivoted to the
It pivots on one end of the. On the other hand, this pair of arms 36
The other end is pivotally supported on both ends of the upper link 37, and the connecting beam 31 is attached to both sides between the upper link 37. In the longitudinal direction of each connecting beam 31,
A pusher body 38 is attached which is slightly narrower than the spacing between the hot plates 9 when the press is opened and has approximately the same thickness, and a guide plate 39 is attached to the approach path of the pusher body 38 on the upper surface of each stage of the hot plates 9. There is.

Next, the action will be explained.

First, the fluid cylinder 11 is operated and the ram 12
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 to the left in the figure along the rail 5. During this movement, the free ends of the regulating devices 18 at the four corners of the hot plate 9 located at the right end come into contact with the brackets 17 of the adjacent hot plates 9, and their maximum opening is sequentially restricted. The left and right spacing between the hot plates 9 of the stages is maintained evenly, and the press is brought into an open state.

Next, the plates 15 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 15 to be processed is supported at its lower end by the drive of the conveyor 21, 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, when the piston rod 26 is extended by the operation of the push-up fluid cylinder 25, the operating shaft 29 is rotated counterclockwise in FIG.
The push-up body 23, which had been recessed under the conveyance surface of the conveyor 21, protrudes from the conveyance surface via a pair of levers 30, and lifts up the lower end of the plate objects 15 to be processed, which are supported in parallel on the conveyor 21. Then, the lower end of the hot plate 9 is inserted into the cutout groove 19, preferably as shown in the left half of FIG. 3 or the two-dot chain line in FIG.

Therefore, the plate 15 to be processed reaches inside the hot plate 9 in the vertical direction as well, and under this condition, the fluid cylinder 11
When the ram 12 is extended by the operation, the press is closed, contrary to the above description, and the plate 15 to be processed is heated and pressurized.

After heating and pressurizing, when the press is opened again by the operation of the fluid cylinder 11, the push-up body 23 is temporarily retracted below the conveying surface by the reverse operation of the push-up fluid cylinder 25. Next, when the connecting beam fluid cylinder 32 is operated to extend the piston rod 33, the arm 36 swings downward using the pin contact 35 as a fulcrum, and the connecting beam 31 descends as shown in FIGS. 3 and 4. reach the limit.

Therefore, as shown in FIGS. 5 and 6, the processed plates 20 still interposed between the hot plates 9 of each stage are moved by the pushing body 38 that descends while being regulated by the guide plate 39. They are pushed down and transferred onto the conveyor 21, and are carried out all at once to an unloader.

After the operation, the press body 38 reaches the standby position at the upper limit by raising the connecting beam 31, one press cycle is completed, and the next press plate 15 is pressed.
Prepare for.

As described above, according to the present invention, in a horizontal multi-stage 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 opposing frames, the hot plates are used when the press is opened. Connecting beams to which pushers are attached at intervals are provided at appropriate positions above each stage of heating plates, and the connecting beams are lowered between each stage of heating plates in an open state after heating and pressurizing. Since each pressing body is inserted between the hot plates and the treated plate interposed between the hot plates is pressed down, during heating and pressurization, the wood resin contained in the plate to be treated or the wood resin coated on the plate to be treated is removed. Even if the treated plate is in close contact with the hot plate due to the adhesive leaking onto the hot plate, the close contact can be easily released by pressing down the pusher.

Furthermore, as shown in Fig. 5, due to the warpage that tends to occur especially in thin processed plates, even if the treated plate is interposed between the hot plates and does not fall freely, As shown, since the processed plate is pushed down by the pusher until its lower end completely protrudes outside the hot plate, smooth removal can be expected.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing one embodiment of the present invention, and FIG.
The figures are the same side view, FIG. 3 is a partially cutaway enlarged front view showing the pushing body and the operation of the pushing body, FIG. 4 is a partially notched enlarged side view showing the pushing body and the operation of the pushing body, and FIG. 6 to 6 are explanatory views of the operation showing the state in which the processed plate is taken out. 1... Upper cross beam, 3, 4... Frame, 5... Rail, 8... Moving member, 9... Hot plate, 10... Movable platen, 15... Treated plate, 18... Regulating tool, 19
... Notch groove, 20 ... Treated plate, 21 ... Conveyor, 23 ... Push-up body, 31 ... Connection beam, 3
8...Push body.

Claims (1)

[Scope of Claims] 1. In a horizontal multi-stage press in which a plurality of heating plates that can be opened and closed are arranged in parallel at equal intervals between left and right frames, the spacing between the heating plates when the press is opened is At least one pair of connecting beams to which pressing bodies are attached are provided at appropriate positions above each stage of heating plates, and the connecting beams are lowered between each stage of heating plates in an open state after heating and pressurizing. A method for taking out a processed plate from a horizontal multistage press, characterized by inserting each pushing body and pushing down the processed plate interposed between hot plates. 2 Frames are installed on the left and right through a pair of upper and lower cross beams arranged at arbitrary intervals, and multiple stages of heating 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 heating plates and movable platen, regulating devices are installed to maintain the spacing between the heating plates evenly when the press is opened, and below each of the heating plates is installed. A conveyor and a push-up body that can freely move in and out of the conveyor are arranged, and above each stage of heating plates, a press is attached to at least a pair of connecting beams that are horizontally suspended between the left and right frames so that they can be raised and lowered. A processed plate removal device for a horizontal multi-stage press, characterized in that a pusher body having approximately the same thickness as the hot plate spacing when opened is attached at each hot plate spacing.