JPH02188201A - Heating and pressurizing method and device of board body - Google Patents

Abstract

PURPOSE:To enable arbitrary pressurization and ventilation control in keeping with a form set up beforehand according to an individual element such as kind of a material or a board thickness or a hydrous state, by a method wherein a hot plate and contacting pressure of the hot plate are made respectively movable in the central direction and adjustable and each stage hot plate group is made into an approximate collecting circular state at the time of closure of a press. CONSTITUTION:A board body 17 which is to be heated and pressurized is inserted onto each stage hot plate 11 from an accumulated pile of the board bodies 17. After placing of the board body 17, a hot plate 11 of a stepped part is moved forward in the central direction within rails 10 with a fitting-in movement between the same and a cam floor running along a lower track on a radial angle of a cam rails. Therefore, the hot plate 11 is approached to the hot plate 11 adjoining solely to the hot plate 11 close to a lower stage equal interval by equal interval, then every time when the hot plate 11 is approached, a regulating sheet 18 falls down by abutting against the undersurface of the hot plate 11 close to the regulating sheet 18 and it becomes a state where a press is closed. Then board bodies 17 supplied between the hot plates 11 of stages each perform arbitrary pressurization control of ventilation control for diffusion of vaporized water to the open air in keeping with a form of the cam rail set up beforehand according to an individual element such as a kind of a material or a board thickness or a hydrous state. At the time of taking out of the board body 17 after heating and pressurization, when the same is separated from the central direction within the rails 10, a regulating piece 19 is restored elastically and the hot plate 11 is released from a press.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention is a method for heating and heating wood boards such as veneer veneer or plywood that have been cut into a predetermined shape using a rotary multi-stage press. The present invention relates to a method and apparatus for applying pressure.

``Prior art'' Conventionally, when drying veneer veneers, there have been used roll dryers whose conveyance paths are formed by arranging multiple pairs of upper and lower rolls, continuous dryers whose conveyance paths are formed by pairs of upper and lower wire mesh bands, etc. An indirect heating method is mainly used in which hot air is circulated indoors using an air medium. On the other hand, contact heating drying methods using large-diameter heating drums, hot plate breathing methods, etc., which are said to have higher thermal conductivity than indirect heating methods, are also used in some cases9. Among these, in the heating drum method, the veneer veneer is transferred between large-diameter heating drums via an endless conveyor belt such as a chino or a belt. Also,
The hot plate breathing method usually uses multiple heat plates arranged above and below.
After inserting a plywood spout plate between the heat plates in each stage using a vertical multi-stage hola press, the movable platen is raised by a ram cylinder installed in the lower frame, and the heat plate located at the lowest stage is raised. The press is closed by sequentially pushing up the hot plate above it from the plate.
The veneer veneers inserted in each stage are dried all at once by contact heating and drying for the required time. This vertical multi-stage hot press is mainly used for heating and pressing plywood rather than for heating and drying veneer spouts. Compared to indirect heating methods, contact heating methods are said to require less drying time and have higher drying efficiency, as well as require smaller installation space and power requirements, which are advantages of contact heating methods. However, it is said that there are drawbacks such as variations in the load applied to the plywood veneer after drying and a decrease in thickness.92 Regardless of the drying efficiency, indirect heating is the mainstream method.9 In addition, heating of plywood It is said that the vertical multi-stage type H.)1 Dobres used for pressurization has the same drawbacks as described above in plywood after heating and pressurizing.

In other words, in a vertical multi-stage hot press, when supporting each stage of the hot plate, support claws are attached to the four corners, and these support claws are placed in order on a ladder-like support that is housed in a support. 9 Therefore, when determining the thickness of the hot plate at each stage, first of all, consider the strength that corresponds to the deflection and bending caused by the distance between the supporting points, and also the rigidity. I need to be able to do it.

In this way, the thickness of the hot plate determined to be more than necessary,
The arrangement in multiple stages in the vertical direction is a plywood board placed on a hot plate, or plywood (IJ).

This results in a further increase in the load on the lower board (called the lower board) at each stage, so after heating and pressing, the thickness of the board placed on the top step and the board placed on the bottom will increase. If you compare the reduction, you will find that they are extremely different.9 For this reason, the applicant has developed a horizontal multi-stage brace in which the left and right are vertically opposed frames, and the hot plate placed between the left and right frames is upright. The patent application was filed earlier, and the above-mentioned disadvantages were solved by equalizing the load applied to the plates inserted between the hot plates of each stage.

However, even in this horizontal multistage press, a loader and an unloader device are required for loading and unloading the plates between the hot plates of each stage. Therefore, the heating and pressing is interrupted every time the heating and unloading (t' work is carried out), which not only hinders the continuity of the heating and pressing process, but also prevents the heating and pressing from being carried in and out of each stage. The equipment is large-scale, as a reciprocating mechanism for the shelves and outer shelves is required.In addition, the press is a mechanism that presses each stage of heating plates in order to create an rR chain, so the pressure applied to each stage of heating plates is uniform. Therefore, it becomes difficult to adjust the pressure according to the properties of each plate.

"Means for Solving the Problems" In view of the above, the present invention rotatably supports a pair of frames having a plurality of rails extending toward the center at arbitrary angles, and uses claw members protruding from both ends thereof to A hot plate having a trapezoidal cross section that engages with the rail is moved forward and backward in the center direction by engaging a cam floor supported by the pawl member and a cam installed outside the frame. The contact pressure between vertically adjacent hot plates can be adjusted freely, and when the press is closed, each stage of hot plate groups is brought into an approximate collective circle state to heat and press the wood board.

"Example of Actual Values" An embodiment of the present invention will be described below with reference to the accompanying drawings.

A bearing 3 is installed on a mounting part 2 placed opposite to each other on a pedestal l to support a hollow shaft 4, and to support a hollow shaft 4.
A cheno wheel 5 is fitted around the outer periphery of one end. A chino 6 is suspended around the chino wheel 5, and driven by a motor 7 installed on the pedestal 1, so that the shaft 4 can be freely rotated.

In the illustrated example, for convenience, the shaft 4 is constituted by a pair of short shafts divided into left and right parts, and a frame 9 is installed at the inner end of each pair of shafts 4 facing each other via a connecting member 8. There is. In this pair of disc-shaped frames 9, a plurality of rails 10 are formed at opposing positions and directed toward the center at arbitrary angles. A pair of protruding pawl members 12 are slidably engaged with the front and rear portions of both sides.

In this case, the rails 10 formed are determined by the number of stages of the hot plates 11 arranged between the frames 9, for example,
If 36 stages of hot plates 11 are to be slidably engaged toward the center, the arbitrary angle is 10 degrees, and the angles are formed radially every 10 degrees. Incidentally, if the Ti structure of each frame 9 is a disc-shaped integral body as shown in the illustrated example, the rail 10
are carved in the shape of a guide; conversely, if it is assembled from a wheel-shaped circular frame, the rail 10 will serve as a guide rail that also serves as a support for supporting this circular frame.

Furthermore, when the press is closed, the hot plates 11 are constructed so that the vertically adjacent ones are in close contact with each other in a planar manner, but as described above, because they are not radially formed and are maintained in the track +10, , are not made up of the same thickness. That is, each of the hot plates 11 is configured to have the same inclined surface because vertically adjacent ones touch each other in a planar manner at each advance limit in the center direction, that is, when the press is closed. Therefore, the external heat W, 11 has a trapezoidal cross-sectional shape toward the center, with the rear side on the opposite side being longer than the side near the center.

On the other hand, a claw member 12 located on the extension of each rail 10 and engaged with the rail 10 is attached to a position near the outer periphery of the pair of frames 9 to heat the frame toward the center. Board 11
A pressing mechanism 13 is installed to control the movement of the movement forward and backward.

This pressing mechanism 13 is, for example, a screw mechanism that attaches the front end of a walking shaft to the rear end of the claw member 12 and transmits the rotation of the prime mover to this walking shaft, and is fitted onto the claw member 12. The gears meshed with the gears of the prime mover, the pawl member 12 and the prime mover are linked via a rack-pinion, a ball screw, etc., or, as shown in the example, a bracket 14 is attached to the outer end of the pawl member 12. The cam floor 15 is supported in a protruding manner through the
In order to position each hot plate 11 on the rail 10 at a position surrounding the shaft 4 outside the pair of frames 9, a fourth
As in the embodiments shown in FIGS. 5 and 7, a fixedly installed cam rail 16 is engaged.

At the upper part of the front end of the hot plate 11, a regulating plate 18 is elastically supported by a spring or the like to regulate the position of the front end of the plate 17 inserted and placed on the hot plate 11. The plate 18 is swingable in a direction perpendicular to the center direction by the movement of a regulating piece 19 protruding from the lower part of the front end of the hot plate 11 located immediately above. This type of regulating plate 18 is oscillated to the thickness of the plate 17 and is removed at a constant interval from the front end of the hot plate 11, and constantly regulates the tip of the plate 17. The entire front end of the plate body 17 is regulated in position by the lower part of the front end of the immediately upper heating plate 11, which is supported in a protruding state through a spring or the like over the entire front end of a pair of ponds placed one above the other. However, it is also possible to use an open method.

A heating medium such as steam, hot water, or hot oil to be supplied and discharged into the hot plate 11 is supplied from the outer end of the shaft 4 from a supply pipe 20 via a rotary joint 21. The supply of the nine stages of hot plates 11 is discharged from the outer end to the discharge pipe 22 via the rotary joint 21 to the supply port 23 located on the 20 side via the flexible pipe 25. The heating medium is supplied to the supply port 23 located on the discharge pipe 22 side through the communication 925 and the flexible pipe 24 that communicate the coupling member 81\W, and conversely, the heating medium is supplied to each stage located on the supply 920 side. From the discharge port 26 of the hot plate 11, it passes through the flexible pipe 24 and the communication pipe 25 that communicates between the coupling member 8, and from the discharge port 26, which is erected toward the discharge g22 side, it passes through the flexible pipe/f24. In each case, the heating medium will be discharged.

An elevating table 28 is installed in the vicinity of one side of the pedestal 1, on which an ilt pile 27 of plates 17 to be heated and pressurized is placed such that it can be raised and lowered. The front end of one support beam 29 is connected to the frame 9.
A pair of upper and lower insertion conveyors 30 are arranged close to each other.

Furthermore, a fluid cylinder 31 for taking out the heated and pressurized wood board 17 is pivotally supported on the upper part of the front support beam 29, and a pair of fluid cylinders 31 are attached to the tip of the piston rod 32 from both ends. A small fluid cylinder 34 is suspended, and a suction cup 36 is supported on the piston rod 35.
Further, its base end is supported by the front support beam 29, and its tip is close to the frame 9, and is connected to a pair of upper and lower take-out conveyors 37 held in an open shape, so that the support beam 29 is connected to An unloading conveyor 39 is installed in a direction perpendicular to the direction of take-out of the heated and pressurized plate 17, and is equipped with a stopper 38 that aligns the heated and pressurized plate 17 on the negative side. In order to insert the plate 17 to be heated and pressurized and to take out the heated and pressurized plate 17 at the relevant part, the radial trajectory deviates from the circular orbit and becomes convoluted in two upper and lower stages. 9 This radial trajectory is formed by opening the hot plate 11 so that the suction cup 36 is only interposed at the rear of the heated and pressurized plate 17, and radiates according to the number of stages of the hot plate 11. The angle and the distance will be variable. For example, if the number of stages of the hot plate 11 is small, the angle will be small, and the hot plate 11 will be opened and closed only by the engagement of the cam floor 15 and the cam rail 16. However, as in this embodiment, the number of stages of the hot plate 11 is 3.
At about the 6th stage, the angle becomes somewhat steeper, so a separate hot plate opening/closing means 40 is required.

This hot plate opening/closing means 40 is, for example, as shown in FIG.
The drawer body 44 is connected to the piston rod 43 of a driftwood cylinder 42 for drawing out the hot plate 11 along the upper track, and the pusher body 44 is connected to the piston rod 46 of a fluid cylinder 45 for pushing the hot plate 11 in the lower part. The cam floor 15 in the above embodiment is configured to follow the track surface of the cam rail 16 from one direction, and this is shown in FIG. As shown in FIG. 2, the cam rail 16 may be made of summer type steel and a pair of cam floors 15 sandwiching both sides of the cam rail 16 may be used to improve its followability.

Next, the followability to the cam rail 16 is improved, and the plate body 17
When the hot plate 11 is always pressed toward the center during heating and pressurization, as shown in FIGS. 12 to cam floor 1
5, a support 48 is installed near the center of the frame 9 or between the outer circumference and the claw member 12 as shown in the figure.
A tension spring 49 is wound around the support 48 connected from the vicinity of the center, and a pressure spring 49 is wound around the support 48 connected from the outer periphery.

Furthermore, in the embodiment described above, the cam rail 16 that engages the cam floor 15 is centered on the axis 4;
Instead of this, in the embodiments shown in FIGS. 1, 3, and 6,
The substantially annular portion of the cam rail 16 is divided into cam blocks 50 at certain angles, and the cam blocks 50 are fitted together to form an annular portion.
By connecting the piston rod 52 of the adjusting fluid cylinder 51, a pressing force can be applied to each cam block 50.

Next, the action will be explained.

The plate body 17 to be heated and pressurized is transferred from the pile pile 27 to each stage of the hot plate 11.
Upon upward insertion, first, the height of the upper surface of the stacking pile 27 is maintained approximately the same as the conveyance surface of the insertion conveyor 30 in the normal state. Next, N conditions such as pressing force, heating time, temperature, etc. are set according to the thickness, moisture content, material, etc. of the plate 17 to be heated and pressed, and one process from insertion to removal, that is, the shaft 4 is approximately 1. After determining the time required for rotation 1 and adjusting the rotational speed of the prime mover 7, each stage of the hot plate 11 is placed in the press closed state by the operation of a pressing mechanism 13 installed at each stage.
Connect the claw member 12 of 1 to the cam floor 15 and the cam rail 16.
The vertically adjacent hot plates 11 are caused to slide in the rail 10 by engagement with each other, and the vertically adjacent hot plates 11 come into contact with each other in a plane state, making each stage of the hot plates 11 group approximately in a collective circle state.

Under this condition, when any one of the groups of beaten hot plates 11 becomes almost the same as the conveyance surface of the insertion conveyor 30, the hot plate 11 of the stepped section is moved to the cam rail 16 at the position immediately above it.
are already spaced centrally within the track 10 along an upper track having a radiation angle of .

Therefore, the hot plate 11 and the hot plate 11 immediately above it are spaced apart from the hot plates 11 of all stages at equal intervals, and each time the heat plate 11 is separated, the regulating plate 18 elastically returns to the upright state, so to speak. The hot plate 11 is released by pressing. The plates 17 located on the top surface of the pile 27 are fed into this open space one by one using a known feeding mechanism such as suction or pricking, or manually. Insertion conveyor 30
When the plate 17 is inserted from the middle, the front end portion of the plate 17 inserted onto the hot plate 11 is aligned by the regulating plate 18,
It will be placed.

After the plate 17 is placed, the heat plate 11 at the stepped portion is placed on the cam rail 16.
The engagement movement with the cam floor 15 along the lower track on the radial angle causes the ball to move forward within the track 10 toward the center.

If the radiation angle of the lower track is steep and the cam floor 15
If the followability is poor, the closet body 4 waits at the reduction limit.
4 in contact with the bracket 14 of the cam floor 15, and the piston rod 46 of the fluid cylinder 45 for pushing the hot plate 11.
By increasing the length of the hot plate 1 along the lower track,
1 is advanced within the rail 10 toward the center.

Therefore, the hot plate 11 independently approaches the hot plate 11 adjacent to the immediately lower stage at equal intervals, and each time the hot plate 11 approaches, the regulating plate 11
8 comes into contact with the lower surface of the nearest hot plate 11, and the press is closed while aligning the front ends of the plates 17.

Next, if the rotation direction of the frame 9 is counterclockwise,
onto the heating plate 11 located at the lowermost stage, or, if the rotation is clockwise as in the illustrated example, the heating plate ll located at the uppermost stage.
The plates 17 are sequentially inserted upward in the same manner as described above, and the shaft 4 is
During approximately one rotation, the plate 17 is fully loaded onto the hot plates 11 of all stages. In the process of closing the body 17, any part of its upper surface comes into contact with the lower surface of the immediately upper heating plate 11 at the same time. Note that the plate 17 supplied between the hot plates 11 in each stage has the shape of the cam rail 16 preset according to individual factors such as the material type, plate thickness, and water content of the plate 17 to be heated and pressurized. Accordingly, arbitrary pressurization control and breather control for dissipating vaporized moisture into the atmosphere are performed.At this time, a plurality of cam blocks 50 are used instead of the fixed cam rail 16. ,
At any given time when the shaft 4 rotates approximately once, 3! with respect to the center direction!
! By controlling the retraction, even if individual factors such as the material type, plate thickness, and glazing radius of the plates 17 that are successively inserted during heating and pressurization change, each factor can be accommodated. When supporting the cam floor 15 from the pawl member 12, by winding the spring 49 through the support 48, the followability of the cam rail 16 and the cam roller 50 to each track surface can be further improved. will be possible.

Next, when removing the plate body 17 after heating and pressurizing, the rail 10 is
When the inside is separated from the center direction, the regulating piece 19
The hot plate 11 is elastically returned while preventing the front end from being uneven in the center direction, and the hot plate 11 is press-released. By bringing the drawer body 41, which is waiting for the last time, into contact with the bracket 14 of the cam floor 15 and contracting the piston rod 43 of the fluid cylinder 42 for drawing out the hot plate 11, the hot plate 11 is moved into the rail IO along the upper track. away from the center.

At this time, the rear upper part of the hot plate 11 is not interfered with by the immediately upper hot plate 11 and is in an open state, so the suction cup 36 is lowered to suck the rear part of the plate 17, and in this state, the fluid cylinder The piston rod 32 of 31 is contracted and transferred onto the delivery conveyor 33. The transferred plate bodies 17 are transferred from the pair of upper and lower take-out conveyors 37 onto the take-out conveyor 39, conveyed perpendicularly to the take-out direction, and then stacked or carried out to the next process.

When inserting and removing the plate body 17 between the hot plates 11,
The rotation of the shaft 4 is intermittently stopped every time the top surface of the hot plates 11 in each stage becomes the same as the conveyance surface of the insertion conveyor 30. For example, if the number of hot plates 11 in 36 stages is 11, the rotation is stopped intermittently every 10". However, since the shaft 4 is rotating at a very low speed, it is possible to insert and remove the plate 17 without having to stop it intermittently each time. 11 This tendency increases as the number of stages increases. By causing a trapezoidal cross-section hot plate that engages with the rail by claw members protruding from both ends of the heat plate to engage a cam floor supported by the claw members and a cam installed outside the frame, The hot plates are made to move forward and backward with respect to the center, and the contact pressure between the vertically adjacent hot plates is set to vJ.
A pair of frames facing each other at an appropriate interval are mounted on a shaft bearing on a pedestal in order to be able to adjust the settings freely and to heat and press the wood boards with each stage of hot plate groups in a near-circular state when the press is closed. A hot plate with a trapezoidal cross section with smaller sides near the center is attached to the rails installed at a certain distance toward the center at arbitrary angles based on the axis of rotation of each frame. A cam floor is fitted and inserted by claw members protruding from both ends and supported by each claw member, and a cam rail is provided outwardly of the pair of frames and engages with each cam floor to determine the position of each hot plate on the rail. installed so that the pressure applied to each hot plate can be adjusted.

Therefore, the plate body 17 to be heated and pressurized can be subjected to arbitrary pressurization control, vaporization, etc. according to the shape of the cam rail 16, which is preset according to individual factors such as the material type, plate thickness, and joint suspension. It is possible to perform breather control for the dissipation of moisture into the atmosphere.

In addition, by controlling multiple cam blocks in place of fixed cam rails in the direction of the center, individual factors such as plate material type, plate thickness, water condition, etc. can be adjusted during the heating and pressurizing process. In addition, if the cam floor is elastically supported from the claw member by a spring, the followability of the cam rail and cam block to each raceway surface can be further improved. In a multi-stage hot press using a horizontal contact heating method, loading the plates between each stage of heating plates,
At the time of carrying out, a loader and an unloader device are each indispensable, and the heating and pressurizing process is temporarily interrupted every time this carrying-in/unloading work is carried out, which hinders the continuity of the heating and pressurizing process.However, according to the present invention, the loader and unloader devices This eliminates the need for an unloader device, making the device itself compact and allows for continuous heating and pressurizing processes.

Furthermore, the opening and closing of the hot plates accompanying the loading and unloading of plates according to the present invention is carried out individually for each stage rather than all stages simultaneously, and this opening/closing movement requires only a small amount of movement toward the center. Like traditional, especially vertical, multi-stage ho-soto presses,
There is no need to excavate a pit for opening and closing the press.

[Brief explanation of the drawing]

Fig. 1 is a plan view of an embodiment of the present invention, Fig. 2 is a view taken along the line A-A in Fig. 1, and Fig. 3 shows the right half of the pressing mechanism of the embodiment shown in Fig. 1. FIG. 1 is a view taken along line B-B in FIG. 1, showing another embodiment of the pressing mechanism on the left half, and FIG. 1, and FIG. 5 shows an example of the pressing mechanism shown in FIG.
Fig. 6 is an enlarged partially cutaway side view of the main part of the present invention, and Fig. 7 is an enlarged and partially cutaway side view of the main part showing the hot plate opening/closing means of the present invention. - Frame, 4... Shaft, 8... Connecting member, 10... Transfer dyeing, 12... Claw member 15... Cam floor, 17... Plate body, 27... Accumulation pile, 30 ...Insertion conveyor, 40...Hot plate opening/closing means, 50...Cam block,

Claims (1)

[Claims] 1. A pair of frames having a plurality of rails extending toward the center at arbitrary angles are rotatably supported, and the frame has a trapezoidal cross section and is engaged with the rails by claw members protruding from both ends of the frame. By engaging the hot plate with a cam floor supported by the claw member and a cam installed outside the frame,
The hot plate is made to move forward and backward with respect to the center direction, and the contact pressure between the vertically adjacent hot plates can be adjusted, and when the press is closed, each stage of the hot plate group is brought into an approximate collective circle state, and the plate body is heated and pressurized. A method of heating and pressing a plate, characterized by: 2. A pair of frames facing each other are fitted onto a shaft bearing on a mount, with an appropriate interval, and each frame is installed at a certain distance toward the center at an arbitrary angle based on the axis of rotation. A hot plate having a trapezoidal cross section with a small side near the center is fitted onto the rail using claw members protruding from both ends thereof, and a cam floor supported by each claw member and the outside of the pair of frames are inserted into the rail. A heating and pressing device for a plate body, characterized in that a cam rail that engages with each cam floor to determine the position of each hot plate on the rail is installed, and the pressing force of each hot plate can be adjusted. 3. A pair of frames facing each other at an appropriate interval were fitted onto a shaft bearing on a mount, and each frame was installed at a certain distance toward the center at arbitrary angles based on the axis of rotation of each frame. A hot plate having a trapezoidal cross section with small sides near the center is fitted onto the rail with claw members protruding from both ends, and a spring is wrapped around each claw member to elastically support the heat plate. A plate characterized in that a cam floor and a cam rail that engages with each cam floor and determines the position on the rail of each hot plate are installed on the outside of the pair of frames, so that the pressing force of each hot plate can be adjusted. Body heating and pressurizing device. 4. A pair of frames facing each other were fitted onto a shaft bearing on a mount, with appropriate intervals, and each frame was installed at a certain distance toward the center at arbitrary angles based on the axis of rotation. A hot plate having a trapezoidal cross section with a small side near the center is fitted into the rail with claw members protruding from both ends thereof, and a cam floor supported by each claw member and the outer side of the pair of frames are inserted into the rail. A movable cam block that engages with each cam floor to determine the position of each hot plate on the rail is installed so that it can move toward and away from the center and is divided into multiple pieces, so that the pressure applied to each hot plate can be adjusted freely. A heating and pressurizing device for a plate body, characterized by: 5. A pair of frames facing each other are fitted onto a shaft bearing on a mount, with an appropriate interval, and each frame is installed at a certain distance toward the center at an arbitrary angle based on the axis of rotation. A hot plate having a trapezoidal cross-section with small sides near the center is fitted onto the rail with claw members protruding from both ends, and a spring is wound around each claw member to elastically support the heat plate. A cam floor and a movable cam block that engages with each cam floor and determines the position on the rail of each hot plate are installed on the outside of the pair of frames so as to be movable toward and away from the center and divided into a plurality of pieces. A heating and pressing device for a plate body, characterized in that the pressing force of each hot plate can be freely adjusted.