JPH025562B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for producing synthetic lumber suitable for cutting plate-like bodies such as core boards of particle boards or plywood for particle boards.

In order to make effective use of wood resources, the present applicant pressurized a group of chips made mainly of chips that were previously discarded at plywood factories into a substantially cylindrical shape.
"Synthetic raw wood" suitable for obtaining plate-like bodies such as core boards of particle boards or plywood for particle boards (Japanese Patent Application No. 106176/1983
31554 Publication)), but since the fibers of the chips are arranged in a random state, when cutting the synthetic raw wood using veneer lace, which is the existing equipment, the centripetal direction of the synthetic raw wood is The fibers of the chillp, which are oriented toward .

In view of the above-mentioned conventional drawbacks, an object of the present invention is to provide an apparatus for producing synthetic lumber that has excellent machinability to the extent that it is possible to obtain a plate-shaped body using existing equipment by simple means. be.

The present invention will be described below with reference to Examples.

FIG. 1 is a front view showing the manufacturing apparatus according to the present invention, FIG. 2 is a plan view of FIG. Fig. 4 is an explanatory diagram showing the state of cutting a plate-like object from synthetic raw wood. Support frames 3a~ with an L-shaped cross section and vertically installed on the
3d and opposing support frames 3a to 3d, and is moved back and forth in the direction of the arrow in the figure by hydraulic cylinders 5a to 5d as driving members fixed to bases 4a to 4d, and has a concave inner circumferential surface; Arc-shaped portions 6a to 6d, each of which assumes a substantially cylindrical shape when reaching a corner of the support frames 3a to 3d, the support frames 3a to 3d, and the arcuate portions 6a to 6.
After a group of chips 8, which will be described later, is inserted into the space 7 surrounded by d, a lid body 9 is placed on the upper part of the support frames 3a to 3d or fixed under pressure, and closes the upper opening of the space 7. Consisting of

In the space 7 of the manufacturing apparatus 1, the main raw material is a chip 10 in the form of a rectangle or rod having fibers in the longitudinal direction, and additives such as fillers and insect repellents are added as necessary. 10
A group of chips 8 to which an appropriate adhesive such as a thermosetting adhesive, a thermoplastic adhesive, or a wet curing adhesive is attached is placed in a random state, and then a lid is placed on the support frames 3a to 3d. A body 9 is placed to close the upper opening of the space 7.

In the above state, the fluid pressure cylinders 5a to 5d are operated respectively, and the arcuate portions 6a to 6d are moved as shown in FIG. 3A.
-Move in the direction of the arrow as shown in C to chip group 8
When pressurized, it becomes as follows.

In other words, it can be considered that there is almost no probability that the tip 10 is correctly oriented in the radial direction, so as shown in FIG.
The states of , , , are explained below. Here, ○ indicates that one end of each chip 10 is on the front side in the paper of FIG. 3a, and ●
indicates that the other end of the chip 10 is on the rearward side.

These chips 10 are connected to hydraulic cylinders 5a and 5.
When c is actuated inward, it receives pushing forces from both left and right sides in the radial direction. Therefore, if an imaginary line parallel to the vertical direction of FIG. Also, the end of the chip 10 on the right side of the imaginary line is pushed to the left.

Looking at these things for each chip 10, since both ends of the chip 10 are on the imaginary line, there is no change even if the chip 10 receives the above force, and the chip 1
For chip 0, the ○ side is pushed to the left and the ● side to the right, and for chip 10, the ○ side is pushed to the left and the ● side is pushed to the right.
The ○ side of chip 10 is pushed to the right and the ● side to the left. As a result, as shown in FIG. 3b, the chips 10 are no longer tilted in the left-right direction, but are tilted in the vertical direction or are not tilted at all.

The chip 10 that has changed in this way does not change any further due to the pushing forces from the left and right sides in the radial direction, but then receives pushing forces from the top and bottom sides in the radial direction.

Therefore, in the same way as above, the ○ side of the chip 10 is pushed downward and the ● side is pushed upward, the ○ side of the chip 10 is pushed upward and the ● side is pushed downward, and the
does not change, and the ○ side of the chip 10 is pushed upward and the ● side is pushed downward. As a result, each chip 10 is no longer inclined in the vertical direction, as shown in FIG. 3c.

The above explanation is about the chip 10 in the vicinity surrounded by the support frames 3a and 3d, but this phenomenon also occurs in other parts in a symmetrical relationship, and the chip 10 as a whole
In most cases, the fibers are in a state that almost matches the fiber direction of the natural wood.

In addition, as the pressure is applied, the tip group 8 is moved to the base 2.
Since movement in the core direction is restricted by the cover body 9 and the chip group 8, the chip group 8 is pressed into a substantially cylindrical shape in a substantially uniform state, and then the pressed state is maintained by the curing of the adhesive, and the majority A substantially cylindrical synthetic wood W is formed in which the fiber direction of the chips substantially matches the fiber direction of the natural wood.

In this embodiment, the manufacturing apparatus 1 is arranged as shown in FIGS. 1 and 2, but the present invention is not limited to the arrangement of the manufacturing apparatus. After randomly introducing chips into a manufacturing device with the opening closed, the manufacturing device is tilted with the upper opening of the space closed with a lid, and a large By aligning a large number of chips so that their fibers almost match the fibers of the natural wood,
Synthetic logs can be efficiently formed.

Further, in this embodiment, the arcuate portion 6a is divided into four parts.
6d to constitute the manufacturing apparatus 1 and press the chip group 8. However, in the present invention, the manufacturing apparatus 1 is constituted by an appropriate number of arcuate sections as shown in FIGS. 5A and 5B. This can also be carried out with a device that compresses the chip group 8 to form the synthetic raw wood W, and it tends to be possible to compact it more uniformly by dividing it into a relatively large number of pieces, but the simplicity of the device Since the equation is the opposite, it is appropriate to divide it into 3 to 8 parts.

Furthermore, if a thermoplastic adhesive is used as the adhesive, the chips are cold-pressed by a pressing device, or if a thermosetting adhesive is used, the chips are pressed by a manufacturing device. The curing time of the adhesive can be shortened by the hot pressing method. In the above description, the synthetic log W to be manufactured is approximately cylindrical, but the gist of the present invention is an apparatus for manufacturing synthetic logs by orienting the fibers of a large number of chips in approximately the same direction as the fibers of natural logs. Therefore, the synthetic raw wood W to be manufactured may have some unevenness on its outer peripheral surface.

As explained above, in the present invention, the fiber direction of the majority of the chips is aligned in a direction that almost corresponds to the fiber of the natural raw wood, and the fibers of the chips are not acted on approximately perpendicularly to the blade of the cutting blade 11. Since the plate-shaped body 12 can be cut with extremely low cutting resistance, a synthetic raw wood W with extremely excellent machinability can be obtained.

According to experiments, "SP-1004 manufactured by Dainippon Ink Co., Ltd." was used as an adhesive on undried or dried chips.
"Mold" or "Sumito Bakelite Co., Ltd. SumiTatsuku GA-614 type" wet curing adhesive is applied as it is or diluted to less than 30 times (weight ratio), resulting in the same level as natural wood. By forming synthetic logs with a moisture content of done.

Next, specific manufacturing conditions for synthetic raw wood W that can be cut into a plate-like body having properties equivalent to those of ordinary particle board are shown below.

Chip conditions Thickness: Approximately 1mm Length: Approximately 30mm Width: Approximately 5mm Moisture content: Approximately 70% when wet or approximately 15% when dry Type of adhesive used Urea resin adhesive or wet curing type Ratio of adhesive to adhesive chips Approximately 10 to 30% (weight ratio) Pressing conditions Approximately 10 to 20 kg/ ^cm2 in the radial cross section Length in fiber direction: Approximately 1 m Diameter: Approximately 400mm Specific gravity: Approximately 0.6 The device of the present invention replaces the conventionally known particle board in which the fiber directions of the chips are arranged in an irregular manner. The purpose of this invention is to provide an apparatus for manufacturing synthetic raw wood W that can be cut into a plate-like body, but the specific gravity of the particle board itself is not uniform depending on its use and the like. Therefore, in the present invention, the specific gravity of the chips used, the type of moisture content, etc., the pressing conditions, the type of adhesive, and the ratio of adhesive to the whole are determined depending on the plate-shaped body to be manufactured. These conditions are appropriately set depending on the intended plate-like object, and are not limited to the above-mentioned specific conditions. Also,
Natural wood itself does not have all its fibers uniformly oriented in the core direction (direction perpendicular to the radial direction). For this reason, the degree of orientation of the fibers in each chip required in the device of the present invention, that is, what proportion of the chips should be oriented in a direction that almost matches the fibers of the natural wood, relative to the entire chip. It's not a thing.

[Brief explanation of drawings]

FIG. 1 is a front view showing a manufacturing apparatus according to the present invention;
Figure 2 is a plan view of Figure 1, Figures 3 a to c are explanatory diagrams showing changes in the arrangement of chips as the compaction progresses, and Figure 4 is a plan view of a plate-shaped body from synthetic raw wood. Explanatory diagrams showing the state, FIGS. 5A and 5B are plan views showing modified embodiments of the present invention, in which 1 is a manufacturing device, 6a to 6d are arcuate parts,
8 is a chip group, 10 is a chip, and W is a synthetic log.

Claims (1)

[Scope of Claims] 1. In a manufacturing device that forms a substantially cylindrical synthetic wood by bonding chips having fibers in the longitudinal direction while pressing each other, the shape matches the overall shape of the outer peripheral surface of the synthetic wood to be manufactured. A circular arc portion formed by dividing a cylindrical body into a plurality of pieces, and a circular arc portion arranged on both sides of each circular arc portion in the tangential direction, and each circular arc portion is separated from an inner position of the cylindrical body and a radius from the inner position. a support frame that guides the support frame in a reciprocating manner between the outside position located on the outside of the direction; and a support frame that reciprocates each arcuate portion supported by the support frame between the inside position and the outside position. A synthetic lumber manufacturing device characterized by comprising: a driving member for causing the movement of the synthetic log;