JPH11114915A - Compression mold for wood - Google Patents

Abstract

PROBLEM TO BE SOLVED: To compress a wood to a desired compressibility at good productivity by a method wherein hydraulic cylinder mechanisms, which can expand and contract vertically, are interposed between an upper mold and a lower mold, both of which compose a wood compression space. SOLUTION: A wood compression mold 4 is mainly composed of a lower mold 6, which has a recessed shape forming a wood compression space 5 housing a wood therewithin for compression molding, and an upper mold 10, which is formed by integrally connecting a wood compressing projecting part 7 and two lower mold fitting outside constitutional parts 8 with a connecting part 9 and fittable from above to the lower mold 6 and has an E-shape turned counterclockwise by 90 degrees. Further, between the upper mold 10 and the lower mold 6, hydraulic cylinder mechanisms 11, which can expand and contact vertically, is interposed. In this case, for example, the hydraulic cylinder mechanism 11 is built in between the upper mold 10 and the lower mold 6. Furthermore, the hydraulic cylinder mechanism 11 may well be provided at a plurality of sites along the longitudinal direction of the wood compression mold 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wood compression molding die, and more particularly to a wood compression molding die capable of compressing wood to a desired compression ratio with high productivity. .

[0002]

2. Description of the Related Art If wood can be compressed and fixed in a compressed and deformed state, the properties of the wood can be changed, for example, by increasing the hardness of the wood.

[0003] In the case of compressing wood, means by pressing and means by rolling are generally considered.

[0004]

When compressing and fixing wood by pressing, the wood can be fixed in a compressed state by leaving it for a long time with a pressing load applied. On the other hand, there is a problem that productivity is deteriorated because the press device is blocked until the wood is fixed.

In the case of compressing wood by rolling, there is an advantage that it is easy to pass a long plate material having a standard size of 3 m, 6 m, 9 m or the like through a rolling roll. Because it is viscoelastic deformation rather than plastic deformation like above, the wood that has exited the roll gap between the rolling rolls gradually recovers and almost returns to the original state, so simply passing through the rolling rolls High compression ratio could not be obtained. For this reason, rolling is repeatedly performed with a plurality of rolling mills provided. However, even in such a case, the finally obtained compression ratio is about 20%, which is necessary for reforming the entire wood. %
There is a problem that it is far from achieving the above compression ratio.

In addition, since wood has directionality and knots in the grain, when actually rolled with a rolling roll and viewed, the cross-sectional shape is not a rectangle but a parallelogram. It turns out that it is difficult to obtain compressed wood having a rectangular cross section because it is distorted, and there is also a problem in terms of product yield.

The present invention has been made in view of the above circumstances, and has as its object to provide a wood compression molding die capable of compressing wood to a desired compression ratio with high productivity.

[0008]

According to the present invention, there is provided a wood compression molding metal in which a vertically movable hydraulic cylinder mechanism is interposed between upper and lower molds constituting a wood compression space. It depends on the mold.

In this case, the hydraulic cylinder mechanism
It may be built in between the upper and lower molds.

The hydraulic cylinder mechanism may be externally provided between the upper and lower molds.

According to the above means, the following effects can be obtained.

The wood is accommodated in the wood compression space of the upper and lower molds, and the wood is rolled or pressed together with the mold.

In this way, by rolling or pressing the wood together with the mold, the wood can be compressed and fixed at a high compression ratio without distorting the cross-sectional shape.

In addition, since the wood is rolled or pressed by using the mold, it is possible to efficiently compress the wood by preparing a large number of molds.

Further, since the hydraulic cylinder mechanism which can obtain a strong force is used, it is possible to reliably open and close the mold.

In this case, the hydraulic cylinder mechanism is
It may be built in between the upper and lower molds, or may be externally attached.

In particular, by externally providing the hydraulic cylinder mechanism to the upper mold and the lower mold, the structure of the wood compression mold is simplified, and the manufacturing cost of the wood compression mold is reduced. And maintenance of the hydraulic cylinder mechanism can be easily performed.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 to FIG. 4 show a first embodiment of the present invention.

It is possible to store a long piece of wood 1 over its entire length,
A wood compression molding die 4 that can be compressed by a rolling mill 2 (see FIG. 3) and a press 3 (see FIG. 4) is provided.

The above-mentioned wood compression mold 4 is provided with the wood 1 inside.
A lower mold 6 having a substantially concave shape forming a wood compression space 5 for accommodating and compression-molding, and a wood compression protrusion 7 which can be fitted to the lower mold 6 from above, and two It mainly consists of an upper mold 10 in which the E-shape is rotated clockwise by 90 degrees, which is formed by integrally connecting a lower mold fitting outer component 8 with a connecting portion 9.

The compressed wood space 5 is not limited to a rectangular shape, but may have any cross-sectional shape.

Further, between the upper mold 10 and the lower mold 6, a hydraulic cylinder mechanism 11 which can expand and contract in a vertical direction is interposed. At this time, for example, the hydraulic cylinder mechanism 11 is built in between the upper mold 10 and the lower mold 6. In addition,
As shown in FIG. 2, the hydraulic cylinder mechanism 11 may be provided at a plurality of positions in the longitudinal direction of the wood compression molding die 4.

More specifically, a vertically extending cylinder space is formed inside the upper die-fitting side component 15 of the lower die 6, and the piston 12 is slidable vertically in the cylinder space. And two hydraulic pressure chambers 13 and 14 are formed above and below the piston 12, and penetrate the upper surface of the piston 12 through the top of the upper mold side structure 15 of the lower mold 6 and move upward. An extending rod 16 is protruded, and the tip of the rod 16 is fixed to the connecting portion 9 of the upper mold 10 by screwing or the like.

It should be noted that a cylinder space may be formed on the side of the upper mold 10 and the tip of a rod extending downward from the cylinder space may be fixed to the side of the lower mold 6.

A liquid passage 17 communicating with the outside through the lower mold 6 and the upper mold 10 is formed in the upper hydraulic chamber 13.
A port 19 capable of connecting a quick joint 18 is formed in the liquid passage 17, a liquid passage 20 communicating with the outside is formed in the lower hydraulic chamber 14, and a quick joint 21 is connected to the liquid passage 20. Form a possible port 22.

Further, a liquid supply path 25 having a tank 23 and a pump 24 is provided, and the leading end of the liquid supply path 25 is branched to form one branch flow path section 26 via an on-off valve 27 and the quick joint 18. Port 1 of the upper hydraulic chamber 13
9 and the other branch passage 28 is connected to the port 22 of the lower hydraulic chamber 14 via the on-off valve 29 and the quick joint 21.

The branch flow path 26 and the branch flow path 28
And a bypass passage 32 having a check valve 30 and an on-off valve 31 that allows the hydraulic fluid to flow only in one direction from the lower hydraulic chamber 14 to the upper hydraulic chamber 13, Further, a return flow path 34 to the tank 23 having the on-off valve 33 is connected to the one branch flow path part 26.

Although the above hydraulic system is illustrated in FIG. 1 so as to be provided only for one hydraulic cylinder mechanism 11, actually, the hydraulic cylinder mechanisms 11 on both sides are actually provided.
Provided for

Further, as shown in FIG. 2, end seal lids 35 are attached to both ends in the longitudinal direction of the wood compression mold 4. The end seal lid 35 is formed with a locking hole 37 that fits into a locking pin 36 protruding from the upper mold 10 and the lower mold 6 so that it can be easily attached and detached. I have.

More specifically, a locking head 36 protruding from the upper mold 10 and the lower mold 6 is provided with a head 38 for retaining the same. Lock hole 3
7, a head through hole 39 through which the head 38 passes is formed on the side. The locking hole 37 of the end seal lid 35 corresponding to the locking pin 36 of the lower die 6 is a long hole extending in the vertical direction, and the head through hole 39 is also a long hole. I have.

Then, a rolling mill 2 as shown in FIG. 3 is prepared for rolling the wood compression molding die 4.

The rolling mill 2 only needs to have at least one of the upper and lower rolling rolls 40.
Is provided on the upper side.

A roller table 41 is provided on the side opposite to the upper and lower sides of the rolling roll 40, for example.

The rolling roll 40 is preferably provided with a friction driving member 43 made of an elastic material such as rubber on the outer periphery of the body 42.

In the drawing, reference numeral 44 denotes a vertical guide roller disposed on the exit side of the rolling mill 2, 45 denotes a horizontal guide roller disposed on the exit side of the rolling mill 2, and 46 denotes a guide roller of the rolling mill 2. A cooling table provided on the outlet side for cooling the wood 1 together with the wood compression molding die 4, and a cooling medium 47 supplied to and discharged from the cooling table 46.

Alternatively, upper and lower slides 48 and 48 as shown in FIG.
A press 3 having 49 is prepared.

Next, the operation will be described.

A long piece of wood 1 whose water content is adjusted by previously containing water is prepared, and the long piece of wood 1 is put into a wood compression mold 4.

In order to put the wood 1 into the wood compression molding die 4, the open / close valves 27 and 31 provided in the hydraulic system are closed, the open / close valves 29 and 33 are opened, the pump 24 is driven, and the tank 2 is opened.
3 is supplied to the lower hydraulic chamber 14 through the liquid supply path 25, the other branch flow path 28, and the liquid passage 20, and the hydraulic fluid in the upper hydraulic chamber 13 is supplied to the liquid passage 17, The tank is returned to the tank 23 via the return flow path. Thereby, the hydraulic cylinder mechanism 11 is extended and moved to the upper mold 10.
And the lower mold 6 is opened, so that the wood 1 is accommodated in the wood compression space 5 of the lower mold 6.

Then, in this state, the wood compression molding die 4
Attach end seal lids 35 to both ends of. That is,
The corresponding locking hole 3 in the end seal lid 35 is connected to the head 38 for retaining the locking pin 36 projecting from the upper mold 10.
7 and through the lower die 6 to the retaining head 38 of the retaining pin 36 protruding from the lower mold 6 to the corresponding through-hole of the retaining hole 37 in the end seal lid 35. 39
To move the end seal lid 35 to the side. Thus, the end seal lid 35 can be easily attached.

When the wood 1 is put in the wood compression mold 4 in this manner, the wood 1 is heated together with the wood compression mold 4 in a furnace (not shown) to bring the wood 1 to a high temperature state. By doing so, the water contained in the wood 1 is evaporated, so that the wood 1 in the wood compression mold 4 is in a high pressure state.

The wood 1 has a grain, and steam tends to escape along the grain from the end or side of the wood 1.
Since the end seal lid 35 is attached to the end of the wood 1, vapor is prevented from escaping from the end of the wood compression molding die 4.

Thus, the wood 1 in the wood compression molding die 4
If the temperature is high and high pressure, the wood compression molding die 4 and the wood 1
Is passed through the rolling mill 2 in FIG. 3, and a load is applied to the wood compression molding die 4 by the rolling rolls 40.

Then, in the wood compression molding die 4, the fitting depth of the upper die 10 and the lower die 6 is increased by the rolling force of the rolling roll 40, and the wood 1 in the wood compression molding die 4 is reduced. Compressed at a high compression rate. At this time, the wood 1 is constrained by the wood compression molding die 4, so that the cross-sectional shape is prevented from being distorted into a parallelogram, and is compressed into a regular rectangular cross-section. When the wood compression space 5 has a cross-sectional shape other than a rectangular shape, the wood 1 is compressed to have that shape.

At this time, unlike the case of metal rolling, a load sufficient to deform the upper die 10 and the lower die 6 constituting the wood compression molding die 4 is not applied. When a roll is used, the rolling roll and the wood compression molding die 4 come into line contact with each other, and the rolling roll and the wood compression molding die 4 relatively slip. The reason why the rolling roll and the rolled material do not cause a slip in the rolling of the metal is that the rolled material is deformed and bitten between the rolling rolls, so that both are brought into a surface contact state.

Therefore, in the present invention, the friction driving member 43 made of an elastic material such as rubber is attached to the outer periphery of the body portion 42 as the rolling roll 40.
By elastically deforming 3, the rolling roll 40 and the wood compression molding die 4 are brought into surface contact with each other to prevent slippage between them. At this time, the wood compression mold 4
, And compresses the wood 1, the high-precision rolling roll 40 is not required.
Can be manufactured at low cost.

When a rolling load is applied to the wood compression molding die 4 by the rolling roll 40, the on-off valves 27, 29, and 33 provided in the hydraulic system are closed, and the on-off valve 31 is opened. To Then, the hydraulic fluid in the lower hydraulic chamber 14 is supplied to the bypass passage 32 having the check valve 30 and the on-off valve 31.
Is released to the upper hydraulic chamber 13 through the valve, and is prevented from flowing backward by the action of the check valve 30. Therefore, the fitting depth of the upper mold 10 and the lower mold 6 by rolling is reduced. The hydraulic cylinder mechanism 11 contracts and moves in the contracted state as the depth of the hydraulic cylinder mechanism 11 increases. Thereby, even if the rolling load is lost, the wood compression molding die 4 itself can fix and hold the wood 1 in a compressed state.

Further, the use of the hydraulic cylinder mechanism 11 makes it possible to continuously change the fitting depth of the upper mold 10 and the lower mold 6, so that the compression ratio of the wood 1 can be set to an arbitrary value. Can be set.

Alternatively, the wood compression molding die 4 and the wood 1
May be pressed between the upper and lower slides 48, 49 of the press 3 in FIG.

Thus, the wood 1 in the wood compression molding die 4
Is rolled or pressed, the wood compression molding die 4 is conveyed to the cooling table 46 by the guide vertical rollers 44 and the guide horizontal rollers 45, and is cooled by the cooling table 46 using the cooling medium 47. The whole wood 1 is cooled.

As a result, the resin component of the wood 1 melted by the high temperature cools and hardens, so that the wood 1 is fixed in a compressed state.

Further, the wood compression molding die 4 is left for a required time so that the wood 1 is completely fixed in a compressed state. When the wood 1 is completely fixed, the wood 1 is removed. Remove from

For that purpose, first, the wood compression molding die 4
The end seal lids 35 are removed from both ends.

More specifically, the end seal lid 35 is shifted to the side, and a head 38 for preventing the locking pin 36 protruding from the upper die 10 from coming off and the corresponding engaging member in the end seal lid 35. The head through hole 39 of the stop hole 37 is aligned, and the head 38 of the stop pin 36 protruding from the lower die 6 for preventing the locking pin 36 from coming off and the head of the stop hole 37 in the end seal lid 35 are provided. The through hole 39 is aligned, and the end seal lid 35 is removed. Thereby, the end seal lid 35 can be easily formed.
Can be removed.

After the end seal lid 35 is removed, the hydraulic cylinder mechanism 11 is extended to move the upper mold 10
And the lower mold 6 are reciprocated.

More specifically, the on / off valves 27 and 31 provided in the hydraulic system are closed, and the on / off valves 29 and 33 are opened to drive the pump 24 so that the hydraulic fluid in the tank 23 is supplied to the fluid supply passage 25 and
The hydraulic fluid in the upper hydraulic chamber 13 is supplied to the tank 23 via the hydraulic passage 17 and the return flow path 34 while being supplied to the lower hydraulic chamber 14 via the other branch flow path 28 and the liquid passage 20. And return it. Thereby, the hydraulic cylinder mechanism 11
Is extended and the upper mold 10 and the lower mold 6 are opened, so that the wood 1 fixed in a compressed state from the wood compression molding mold 4 can be easily taken out.

At this time, since the hydraulic cylinder mechanism 11 is used, the upper mold 10 and the lower mold 6 can be opened with a strong force, and the wood 1 can be taken out without fail.

As described above, according to the present invention, a large number of wood compression molding dies 4 are prepared by compressing the wood 1 with the rolling mill 2 and the press 3 together with the wood compression molding dies 4. Alone, it is possible to compress the wood 1 in a large amount.

FIG. 5 shows a second embodiment of the present invention, in which the hydraulic cylinder mechanism 50 is externally attached to the upper mold 10 and the lower mold 6.

As described above, by externally attaching the hydraulic cylinder mechanism 50 to the upper mold 10 and the lower mold 6,
The structure of the wood compression molding die 4 is simplified, the manufacturing cost of the wood compression molding die 4 can be reduced, and the maintenance of the hydraulic cylinder mechanism 50 can be easily performed.

Except for the above, it has the same configuration as that of the above embodiment, and can obtain the same operation and effect.

It should be noted that the present invention is not limited to only the above-described embodiment, and it goes without saying that various changes can be made without departing from the spirit of the present invention.

[0064]

As described above, according to the wood compression molding die of the present invention, an excellent effect that wood can be compressed to a desired compression ratio with high productivity can be obtained.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a wood compression molding die according to a first embodiment of the present invention.

FIG. 2 is a perspective view of the wood compression molding die as viewed from substantially the side.

FIG. 3 is a side view of a rolling mill for rolling a wood compression molding die.

FIG. 4 is a side view of a press for pressing a wood compression molding die.

FIG. 5 is a longitudinal sectional view of a wood compression molding die according to a second embodiment of the present invention.

[Explanation of symbols]

 5 Wood compression space 6 Lower mold 10 Upper mold 11,50 Hydraulic cylinder mechanism

Continuation of front page (72) Inventor Sadahiko Shintani 1 Shin-Nakahara-cho, Isogo-ku, Yokohama-shi, Kanagawa Ishikawashima Harima Heavy Industries, Ltd.

Claims (3)

[Claims] 1. A wood compression molding mold comprising a vertically movable hydraulic cylinder mechanism interposed between upper and lower molds constituting a wood compression space. 2. The wood compression molding mold according to claim 1, wherein the hydraulic cylinder mechanism is built in between the upper and lower molds. 3. The wood compression molding mold according to claim 1, wherein the hydraulic cylinder mechanism is externally provided between the upper and lower molds.