JP2006044053A - Compression-molded wood and its production method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make compression-molded wood be excellent in strength and durability while keeping the texture of a wood surface in the compression-molded wood and its production method. <P>SOLUTION: When wood is compressed by a mold being heated, wax which is melted at the temperature of the mold is supplied to the space between the mold and the compression-molded wood 1 to make the wax permeate the surface layer part of the wood to form a wax-impregnated part 2 while the wood is fixed to the mold. The wax is demolded when the wax is cooled to lose its fluidity. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a compression molded wood surface-treated with wax and a method for producing the same.

Conventionally, exterior materials for electronic devices such as cameras, mobile phones, IC recorders, PDAs, televisions, video decks, air conditioners, remote controls for home appliances such as projectors, have functional aspects such as moldability, robustness, and corrosion resistance. Since it is mass-produced industrially in consideration, it is generally produced exclusively with materials suitable for mass production such as synthetic resins and light metals. These materials are subjected to a surface treatment such as coating or plating as necessary in order to increase the surface gloss or increase the corrosion resistance of the surface.
However, synthetic resins and light metals lack the gentle texture that appeals to the human sensibility of natural materials such as wood and bamboo, and the excellent visual effects brought about by, for example, natural wood grain. It tends to be.
Therefore, compression-molded wood with improved strength has been proposed in order to use wood for industrial products by taking advantage of the texture of natural materials and natural grain.
In addition, a surface treatment method for wood has been proposed that improves the surface properties of the wood to improve the corrosion resistance.
For example, Patent Document 1 describes a wood component impregnated with a solvent-free melt for impregnation of wood that is solid at room temperature, and a method of impregnation into wood in which such a melt is immersed by heating and pressing. ing.
JP 2003-73608 A (page 3-5)

However, the compression-molded wood and its manufacturing method as described above have the following problems.
Although compression-molded wood has improved strength, it may deteriorate due to, for example, moisture permeating from the surface. In order to prevent this, a coating process is generally performed. In this case, however, there is a problem that the surface of the wood is covered with a coating material and the texture of the natural material is lost.
Further, if the surface is scratched, the coating layer is lost, so that there is a problem that moisture penetrates from there and the deterioration proceeds and the durability is impaired.
In the technique described in Patent Document 1, since the wood is impregnated with a melt that is solid at room temperature, the penetration of moisture and the like can be suppressed even if the surface is damaged. Therefore, although durability is maintained, the surface of the wood is covered in layers by the melt because the wood is immersed and impregnated in the melt melted by heating. As a result, there is a problem that the texture of the natural material is lost as in the coating process.
If the wood surface is to be exposed in order to regain the texture of the wood, there is a problem that it takes time since a step for removing the melt layer on the surface must be added by, for example, surface polishing.

  This invention is made | formed in view of the above problems, Comprising: It aims at providing the compression molding wood excellent in intensity | strength and durability, and its manufacturing method, maintaining the feel of the wood surface.

In order to solve the above-described problems, the invention according to claim 1 is a compression-molded wood in which at least a surface layer portion is impregnated with wax.
According to this invention, since the wax is impregnated at least in the surface layer portion of the compression-molded wood, moisture or the like does not permeate into the interior without performing a coating treatment that covers the wood surface. Further, even when the surface is damaged, moisture or the like does not penetrate into the inside as long as the depth of the scratch remains at the surface layer portion. Therefore, it is possible to prevent a decrease in strength due to deterioration, corrosion, or the like of the compression molded wood while keeping the texture of the wood on the wood surface.
Further, by applying compression along a smooth mold surface in a state in which the surface layer portion of wood is impregnated with wax, a surface property rich in gloss can be obtained even in a state where a raw woody texture is left.

  Here, the surface layer portion of the compression-molded wood means a region extending from the surface of the compression-molded wood to the inside at an appropriate depth.

In the invention according to claim 2, in the compression molded wood according to claim 1, the wax includes an additive having a melting point higher than the melting temperature of the base material.
According to the present invention, even an additive having a relatively high melting point can be dispersed in the surface layer portion of the compression-molded wood by mixing with the molten wax base material.

The invention according to claim 3 is a method for producing compression-molded wood, comprising a compression step of raising the temperature of the wood and compressing the wood with a mold, and a mold shape on the wood by maintaining the clamping in the elevated temperature state. A method for producing a compression-molded wood having a fixing step of transferring and fixing the material, and a demolding step of releasing the wood from the mold, wherein at least one of the compression step and the fixing step, the mold A wax that melts at a temperature in the elevated temperature state between the surface of the wood and the wood surface, the wax is infiltrated into the surface layer portion of the wood, the mold clamping is continued for a predetermined time, and the fluidity of the wax is The demolding process is performed after the temperature is lost.
According to the present invention, since the molten wax is supplied in a temperature rising state in at least one of the compression step and the fixing step, the molten wax is smoothly permeated into the surface layer portion of the wood. Then, the mold shape is transferred and fixed by continuing the mold clamping for a predetermined time, and the mold is removed after reaching a temperature at which the fluidity of the wax is lost. Therefore, while the wax has fluidity, the clamping is continued and the wood surface is in close contact with the mold surface, so that the compression molded wood surface is not entirely covered with the wax layer and the wood surface is exposed. Can be demolded.
At that time, the melted wax subjected to compression between the mold and the wood surface has a function of a lubricant, so that the compression is performed smoothly and the melted wax follows the mold surface shape. The gloss of can be improved. In the demolding step, the releasability can be improved by the wax present in the surface layer of the wood.

According to a fourth aspect of the present invention, in the method for producing a compression molded wood according to the third aspect, when the wax is supplied between the mold and the wood surface, at least a space surrounded by the mold. The inside is made into a negative pressure state by vacuum suction.
According to the present invention, at least the space surrounded by the mold is sucked into a negative pressure state, so that air, moisture, etc. existing in the wood fiber are discharged from the space surrounded by the mold at least. It is possible to smoothly infiltrate the wax into the wood fiber from which the water is discharged.

According to a fifth aspect of the present invention, in the compression molded wood manufacturing method according to the third aspect, the compression step and the fixing step are performed by placing the mold in a vacuum vessel capable of vacuum suction. To do.
According to the present invention, the mold is arranged in a vacuum vessel capable of vacuum suction, and the compression process and the fixing process are performed, so there is no need to provide a structure for vacuum suction of the mold, and a general-purpose mold structure Even so, it is possible to easily perform vacuum suction in these steps.

According to a sixth aspect of the present invention, in the method for producing a compression-molded wood according to any of the third to fifth aspects, the wax contains an additive having a melting point higher than the melting temperature of the base material.
According to the present invention, even an additive having a relatively high melting point can be dispersed in the surface layer portion of the compression-molded wood by mixing with the molten wax base material.

  According to the compression-molded wood of the present invention and the method for producing the same, since the surface layer is impregnated with wax, it is possible to prevent the penetration of moisture and the like without applying a coating treatment. Since it is possible to prevent deterioration and corrosion of wood due to infiltration, etc., there is an effect that strength and durability can be improved while maintaining the texture of the wood surface.

Hereinafter, details of embodiments of the present invention will be described with reference to the accompanying drawings. In all the drawings, even if the embodiments are different, the same or corresponding members are denoted by the same reference numerals, and common description is omitted.
The compression molded wood according to the embodiment of the present invention will be described.
1A and 1B are a perspective explanatory view and a cross-sectional view taken along line AA for explaining a compression molded wood according to an embodiment of the present invention. FIG. 2A is a schematic explanatory diagram for explaining the structure of a cross section perpendicular to the wood fiber in the wax-impregnated portion of the compression-molded wood according to the embodiment of the present invention. FIG. 2B is a schematic explanatory view for explaining the structure of a cross section perpendicular to the wood fiber before compression.

The compression-molded wood of this embodiment is compression-molded by a mold and has a three-dimensional shape such as a box shape or a thin shell shape, and can be used for various applications. In addition, it can be suitably used as an exterior material for electronic devices such as remote controllers for home appliances such as mobile phones, IC recorders, PDAs, televisions, video decks, air conditioners, and projectors.
The compression-molded wood 1 shown in FIG. 1A is an example thereof, and is formed as a box that is open to one side by surrounding the bottom portion of the substantially rectangular shape in plan view with the side wall portion 1C. The inner surface 1B is formed by the core side mold, and the outer surface 1A is formed by the cavity side mold.

  Then, as shown in a cross-sectional view in FIG. 1B, the wax 5 (see FIG. 2A) within the surface layer portions of the outer surface 1A and the inner surface 1B, that is, within the appropriate depth range from the respective surfaces to the inner side. ) Is impregnated with the wax-impregnated portion 2. This depth can be varied depending on the thickness of the compression molded wood 1, the compression ratio, the density of the wood, the viscosity at the time of melting of the wax 5, etc. In consideration of the above, it is preferable to form it to a depth greater than that. In the drawing, it is drawn in a range of about one-fourth of the plate thickness, but it may be thicker or thinner than this, and the thickness may vary depending on the location. Moreover, the wax impregnation part 2 may extend over the whole plate | board thickness direction.

In FIG.1 (b), the code | symbol 1a represents typically the wood fiber which appears in a cross section. Actually, the wood fibers are densely arranged, but only a small part is selected and displayed here.
As schematically shown in FIG. 2 (b), the surface of normal wood (coniferous tree) is surrounded by cell walls W to form a temporary conduit T that is continuous inside the wood, and the temporary conduit T has a relatively large opening. is doing. On the other hand, in the wax-impregnated portion 2 of the compression molded wood 1, as schematically shown in FIG. 2A, the cell wall W is crushed in the compression direction, and the opening of the temporary conduit T is slit.
The wax 5 is mainly permeated into a depth range from the surface through such a slit temporary conduit T to form the wax-impregnated portion 2. In this specification, the term “woody fiber” refers to a single temporary conduit (in the case of conifers) or a conduit (in the case of broadleaf trees) surrounded by the cell wall W.

  Examples of the wood for forming the compression molded wood 1 include camellia, camellia leaf, paulownia, teak, mahogany, cedar, pine, cherry, bamboo, and the like. It is also possible to use not only lumber wood but also woody materials such as compression processed materials obtained by collecting and hardening waste chips and wood flour.

The wax 5 is a solid at room temperature and becomes a liquid having a relatively low viscosity when heated. For example, natural wax extracted from animals and plants, artificial substitutes thereof, petroleum wax such as paraffin, hydrocarbon-based wax, etc. Synthetic waxes, and mixtures thereof.
And in order to improve the surface state of the compression-molded wood 1, for example, moisture resistance, waterproofing, swelling prevention, surface flattening (polishing), antifouling, imparting electrical insulation, etc. Wax can be employed.
However, the environmental temperature at which the compression molded wood 1 is used is a solid that is melted and becomes a liquid in a temperature rising state when the compression molded wood 1 is molded. For example, those having a melting temperature in the range of 70 ° C. to 180 ° C. can be suitably employed.
In order to promote penetration, the viscosity at the time of melting is preferably as low as possible.

In addition, the wax 5 may contain an additive that has a melting point higher than the melting temperature of the wax base material and is solid in a temperature rising state at the time of molding as long as the fluidity at the time of melting is not impaired. In this case, the particle size of the additive is preferably small so that it can flow together with the base material and penetrate into the wood fibers.
As the additive, various substances can be adopted depending on the purpose, and examples thereof include an antibacterial material for antibacterial processing and a coloring material for coloring.

According to such compression-molded wood 1, since the wax-impregnated portion 2 is formed on the surface layer portion of the outer surface 1A and the inner surface 1B, the entry and exit of air, moisture, and the like are restricted.
Therefore, for example, it is possible to prevent moisture from penetrating and the compression-molded wood 1 to swell and be deformed, the wood fibers to be corroded, and dirt to enter and be damaged. Further, even when the surface is damaged, these effects can be maintained within the range where the wax-impregnated portion 2 is formed.
Therefore, since the strength of the compression molded wood 1 and the aesthetic appearance of the surface can be maintained over time, durability can be improved.

Further, the compression molded wood 1 is molded in a state of being closely adhered along the surface of the smooth mold, and the surface layer portion is impregnated with the wax 5, so that the surface smoothness and glossiness are excellent. Yes. For this reason, even if it does not perform a coating process etc., it has the surface property suitable for uses, such as an exterior material of an industrial product, for example.
And since the surface is not entirely covered with a coating layer such as resin or wax, there is an advantage that the texture of wood, which is a natural material, such as the feel, color, and texture of the wood surface can be maintained. .

  Thus, the compression molded wood 1 has strength, durability, smoothness, glossiness, an aesthetic appearance that keeps the texture of the wood, and the like, and housings and exteriors of various industrial products including exterior materials for electronic devices. It can be suitably used as a material.

Next, the manufacturing method of the compression molded wood which concerns on embodiment of this invention is demonstrated.
FIG. 3 is a flowchart for explaining a schematic process of the method for producing compression-molded wood according to the embodiment of the present invention. 4 (a) and 4 (b) are process explanatory views for explaining a rough cutting process and a compression process. FIG. 5 is a flowchart for explaining details of the fixing step. Fig.6 (a) is process explanatory drawing for demonstrating a fixing process similarly. FIG. 6B is a process explanatory diagram for explaining a first modification of the fixing process.

As shown in FIG. 3, the manufacturing method of the compression molded wood of this embodiment performs a roughing process, a compression process, a fixing process, and a demolding process in this order. The compression molded wood 1 is impregnated with the wax 5 in at least one of the compression step and the fixing step.
Below, the case where the wax 5 is impregnated in a fixing process is demonstrated.

  In the rough cutting process of step S1, considering the compression rate in each part of the compression-molded wood 1, for example, the rough-cut wood 10 (see FIG. 4A) whose plate thickness is larger than the dimensions of the compression-molded wood 1 is used. It is a process of shaving.

In the compression step of step S2, as shown in FIGS. 4A and 4B, the roughened wood 10 is used as a core-side mold to form a shape of the inner surface 1B of the compression-molded wood 1 provided in a generally convex shape. An upper mold frame B having a mold surface B ₁ , and a lower mold frame A having a mold surface A ₁ which is provided in a substantially concave shape to form the shape of the outer surface 1 A of the compression-molded wood 1 as a cavity-side mold. It is a process of performing compression molding by sandwiching between.
Although not particularly shown, the lower mold frame A and the upper mold frame B are each provided with a temperature adjusting mechanism that adjusts the mold temperature, and is held by a press mechanism that clamps the mold in the vertical direction and applies pressure. These are installed in a pressure vessel (not shown) in which the inside of the vessel maintains a predetermined pressure and temperature, and high-pressure and high-temperature steam can be jetted and vacuum suctioned.
In this step, the mold temperature is maintained at, for example, 180 ° C. to 200 ° C., and compression is performed while supplying steam at 180 ° C. to 200 ° C. and 1 to 1.6 MPa, for example. The rough-cut wood 10 is easily compression-molded because it absorbs water vapor and is heated and heated to increase flexibility.
FIG. 4B shows a state where the mold is clamped and the rough-cut wood 10 is formed into the shape of the compression-molded wood 1 along the mold surfaces A ₁ and B ₁ .

The fixing step in step S3 is a step for permanently fixing the compressed shape along the mold shape to the wood and forming the wax-impregnated portion 2 on the wood surface.
Details of this step will be described with reference to FIGS.
In step S10, the mold clamping state in the compression process is held for a predetermined time. The predetermined time until the compressed shape is permanently fixed varies depending on, for example, the type of wood, the water vapor temperature, the pressure, and the mold temperature, but is, for example, about 10 minutes to 1 minute in the range of the present embodiment. By keeping the high-temperature water vapor permeated into the wood, the mold clamping and holding time can be remarkably reduced as compared with the case where the mold temperature is simply maintained at a high temperature.

In step S <b> 11, the injection of water vapor is stopped, the mold clamping force is released while maintaining the temperature rising state of the mold, and a slight gap is formed between the mold and the compression molded wood 1. Then, by vacuuming the pressure vessel, the space surrounded by the mold is set to a negative pressure, and air and moisture are discharged. Since the clamping force is released, the moisture inside the compression molded wood 1 is also discharged through a slight gap.
Here, the vacuum suction does not have to completely evacuate the space surrounded by the mold. For example, even when the pressure is reduced to about half of the atmospheric pressure, the drainage of the water 5 and the wax 5 described later can be performed sufficiently efficiently. Infiltration can be performed.

In step S12, the wax 5 is supplied between the mold and the compression molded wood 1 by the wax injection tube 6 (see FIG. 6A). Since the temperature in the pressure vessel, the mold temperature, and the temperature of the compression molded wood 1 are in the elevated state, the wax 5 is melted. For this reason, the wax 5 flows along the mold surfaces A ₁ and B ₁ in combination with the fact that the air, moisture, etc. inside the compression molded wood 1 are exhausted by vacuum suction, and the compression molding is sequentially performed. It penetrates into the surface layer of the wood 1 and penetrates from the entire outer surface 1A and inner surface 1B of the compression molded wood 1.

In step S13, re-clamping is performed at the timing when the wax 5 has penetrated into a predetermined range. Thereby, the outer surface 1A (inner surface 1B) and the mold surface A ₁ (B ₁ ) are brought into close contact with each other, and the mold shape is accurately transferred. For example, even if the surface swells due to the permeation of the wax 5, it is recompressed and returned to a shape conforming to the mold shape and fixed. Further, even if a film layer is temporarily formed by the wax 5 by flowing on the surface of the outer surface 1A (inner surface 1B), it is recompressed so that the mold surface A ₁ (B ₁ ) It is pushed inside or pushed out of the mold, eliminating the extra wax film layer. The wood surface is brought into close contact along the mold surface A ₁ (B ₁ ).

In step S14, in order to prevent the wax 5 from flowing out to the surface after demolding, it is cooled or allowed to cool in a state where the mold clamping is held, and is left until at least the wax 5 on the surface has no fluidity.
Above, a fixing process (step S3) is complete | finished.
In this manner, in this step, the mold shape is transferred and fixed to the compression molded wood 1 and the wax impregnated portion 2 is formed.

Next, in the demolding step of step S4 (see FIG. 3), the mold clamping force is released, the mold is opened, and the compression molded wood 1 is demolded. At this time, since the fluidity of the wax 5 is lost at least on the surface, the impregnated wax 5 does not flow out from the surface of the compression molded wood 1.
Further, since the wax 5 impregnated in the surface layer portion of the compression-molded wood 1 comes into contact with the mold surface, it has the advantage that it can be easily removed from the mold because it has the effect of a release agent.

According to this method, the mold clamping is continued while the wax 5 has fluidity, and the surface of the wood closely adheres to the mold surface, so that the surface of the compression molded wood 1 can be entirely covered with the wax 5. In other words, the mold can be removed in a state where the surface layer portion is pressed along the mold surface to form a smooth wooden surface. For this reason, a smooth and glossy surface is formed on the compression molded wood 1.
For example, when immersed in molten wax, the wax layer remains on the surface, so in order to expose the wood surface, it is necessary to remove the extra wax layer by, for example, grinding, polishing process, etc. after impregnation There is. Moreover, since the smoothness of the surface is lost by the removal process at that time, the surface becomes a woody surface that has lost its gloss, and therefore it is necessary to provide a polishing process and the like.
According to this method, since such a process can be omitted, the glossy compression-molded wood 1 with the exposed wood surface can be efficiently produced.

Moreover, the impregnation of the wax for improving the surface property of the wood is performed in parallel in the fixing process for permanent fixing using the temperature rise state of the compression molding process. At that time, vacuum suction used for draining water in order to infiltrate the wax 5 is also shared. Therefore, compared with the case where a dipping process or a surface treatment process is provided after compression molding, the process cycle can be shortened, and an apparatus for performing these processes is not necessary, so that the manufacturing process can be streamlined. There is an advantage.
Moreover, even if the wax is impregnated, it is possible to prevent the compression-molded wood 1 from being swollen and causing variation in shape accuracy.
Moreover, since each process is performed in a pressure vessel, there exists an advantage that it can compress-mold using a general purpose metal mold | die.

Next, a first modification of the method will be described.
The manufacturing method of the compression molded wood of this modification is a method performed without putting the lower mold frame A, the upper mold frame B, etc. into the pressure vessel. The following briefly describes the differences from the above embodiment.
In this method, as shown in FIG. 6B, a sealing member such as an O-ring 9 is provided on the mating surfaces of the lower mold frame A and the upper mold frame B, and the mold surface A ₁ , mold space to be sealed, etc. B ₁ is a structure which is kept airtight, liquid-tight. A vacuum evacuation line 20 that connects such an in-mold space and an external vacuum pump, and a high-pressure steam line 21 that circulates high-pressure steam are provided. Inside the lower mold frame A and the upper mold frame B, a plurality of wax supply pipes 7 and 8 that open to the mold surfaces A ₁ and B ₁ are provided. The tip of the wax supply pipes 7 and 8 is provided with a valve mechanism 22 so that the state can be switched between a closed state along the mold surface and an open state for supplying the wax 5.

With such a mold structure, high-temperature and high-pressure steam injection, vacuum suction, and wax supply in the compression process and the fixing process can be performed in the mold space.
That is, in the compression step, the rough-cut wood 10 preliminarily sprayed with high-temperature and high-pressure steam is transferred to a mold, compressed, and clamped. Then, high-temperature and high-pressure steam is circulated through the high-pressure steam pipe 21 in the mold space. This ensures that the roughened wood 10 adheres to the mold surface.
In the fixing step, the above-described state is maintained for a predetermined time, and the mold shape is completely transferred to achieve permanent fixing.
After a predetermined time has elapsed, the circulation of high-temperature and high-pressure steam is stopped and drained. Then, moisture and air are vacuumed from the vacuum line 10. Thereafter, the wax 5 is supplied through the wax supply pipes 7 and 8. In this case, since the wax supply pipes 7 and 8 are formed inside the lower mold frame A and the upper mold frame B, the wax supply pipes 7 and 8 are heated to the mold temperature and can supply the wax 5 in a molten state.
After the desired wax-impregnated portion 2 is formed, the valve mechanisms of the wax supply pipes 7 and 8 are closed, and then Steps S13 and S14 in FIG. 5 are performed.

  According to this modification, high-temperature and high-pressure steam injection, vacuum suction, and wax supply are performed in the mold space, so the entire mold including the press mechanism does not have to be stored in the pressure vessel, and is manufactured with a simple device. There is an advantage that you can.

Next, a second modification of the method will be described.
In this modification, instead of impregnating the wax 5 in the fixing step, the wax 5 is impregnated in the compression step.
Therefore, the wax 5 is supplied between the rough-cut wood 10 and the mold surfaces A ₁ and B ₁ at the time of compression. Since the mold temperature is a temperature at which the wax 5 melts, the wax 5 is in a state of flowing between the rough-cut wood 10 and the mold surfaces A ₁ and B ₁ through the compression process. Therefore, it receives the compression force of the mold and penetrates into the wood.
Then, in the fixing step, the mold shape is transferred and fixed while the mold clamping state is maintained for a predetermined time. Thereafter, the wax 5 is cooled or allowed to cool to a temperature at which the fluidity of the wax 5 is lost, and then appropriately dried, and then the demolding step is performed.

According to this modified example, the wax 5 is interposed between the mold surfaces A ₁ and B ₁ and the roughened wood 10 during the compression, so that the compression can be performed smoothly and the surface of the roughened wood 10 is smooth. In addition, since it is pressed and compressed on the mold surface, there is an advantage that a smoother surface property can be obtained.

  In the above description, the compression molded wood 1 has been described with an example in which the wax-impregnated portion 2 is provided on both the cavity side and the core side. However, the wax-impregnated portion 2 may be provided on the necessary side in a necessary size. it can. For example, the wax-impregnated portion 2 may be provided only on the side that becomes the surface of the exterior, such as when used for an exterior material.

  In the above description, the example of a box having an opening as the compression-molded wood 1 has been described. However, any shape may be used as long as it is compression-molded with a mold, for example, a flat plate or the like. Good.

  Further, in the above description, the fixing process has been described as maintaining the temperature of the pressure vessel and the mold until step S13. However, since the permanent fixing is completed by step S11, the wax is thereafter removed. What is necessary is just to be able to hold | maintain the temperature rising state of the grade which fuse | melts. Since the melting temperature of the wax is generally lower than the temperature necessary for permanent fixation, heating may be stopped or gradually cooled until the end of step S13. In this way, since the time of step S14 can be shortened, there is an advantage that the manufacturing tact can be shortened.

It is a perspective explanatory view for explaining compression molding wood concerning an embodiment of the present invention, and an AA sectional view. It is a typical explanatory view for explaining the structure of a section perpendicular to the wax impregnation part of compression molding wood concerning the embodiment of the present invention, and the wood fiber before compression. It is a flowchart for demonstrating the general | schematic process of the manufacturing method of the compression molding wood which concerns on embodiment of this invention. It is process explanatory drawing for demonstrating the roughing process of this embodiment, and a compression process. It is a flowchart for demonstrating the detail of the fixing process of this embodiment. It is process explanatory drawing for demonstrating the fixing process of this embodiment, and its 1st modification.

Explanation of symbols

1 compression molded timber 2 wax impregnated section 5 Wax 6 injection tube 10 rough wood _A 1, _{B 1} mold surface

Claims (6)

  A compression-molded wood characterized in that at least a surface layer portion is impregnated with wax.   The compression molded wood according to claim 1, wherein the wax contains an additive having a melting point higher than the melting temperature of the base material. A compression process in which the temperature of the wood is raised and compressed with a mold, a fixing process in which the mold shape is transferred and fixed to the wood by maintaining the mold clamping in the elevated temperature state, and a removal process in which the wood is removed from the mold. A method for producing compression molded wood having a mold step,
In at least one of the compression step and the fixing step, a wax that melts at the temperature in the elevated temperature state is supplied between the mold and the wood surface so that the wax penetrates into the surface layer portion of the wood. The method for producing a compression-molded wood, wherein the demolding step is performed after reaching a temperature at which the fluidity of the wax is lost.   4. The compression molding according to claim 3, wherein when the wax is supplied between the mold and the wood surface, at least the space surrounded by the mold is brought into a negative pressure state by vacuum suction. Wood manufacturing method.   The method for producing a compression-molded wood according to claim 4, wherein the compression step and the fixing step are performed by placing the mold in a pressure vessel capable of vacuum suction.   The method for producing a compression-molded wood according to any one of claims 3 to 5, wherein the wax contains an additive having a melting point higher than the melting temperature of the base material.

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