JP4294641B2 - Wood processing method and exterior body for electronic equipment - Google Patents

Description

  The present invention relates to a wood processing method for processing wood by compressing the wood, and an electronic device exterior body formed by the wood processing method.

  In recent years, natural wood has attracted attention. Since wood has a variety of grain, individual differences occur depending on the location of the raw wood, and the individual differences are the individuality of each product. In addition, scratches and changes in color caused by long-term use may also have a unique texture and may be familiar to the user. For these reasons, wood has been attracting attention as a material that can produce unique and tasty products that are not found in products using synthetic resins or light metals, and its processing technology is also making dramatic progress.

  Conventionally, as a processing technique for such wood, after compressing a piece of water-absorbed and softened wood and slicing the wood substantially parallel to the compression direction to obtain a plate-like primary fixed product, this primary fixed product is heated and absorbed by water. There is known a technique of forming a predetermined three-dimensional shape while performing the process (for example, see Patent Document 1). There is also known a technique in which a piece of wood compressed in a softened state is temporarily fixed, and this wood is put into a mold and recovered to mold (for example, see Patent Document 2). Wood (compressed wood) compression-molded using such a processing technique has a strength that can be applied as an exterior body of an electronic device (see, for example, Patent Document 3).

  By the way, wood has a drawback that it is easy to burn as compared with metals and synthetic resins. As a technique for eliminating such defects of wood and making the wood flame-retardant, there is known a technique for injecting or impregnating a flame-retardant treatment liquid containing an appropriate chemical (a flame retardant) from the surface of the wood. When performing this flame retardant treatment, it is common to inject or impregnate a flame retardant treatment liquid from the surface at the stage of raw wood. In this case, the flame-retardant treatment liquid rarely penetrates into the raw wood. Further, when the raw wood is used as it is, it is only necessary that the flame-retardant treatment liquid permeates the surface, and it is not necessary to permeate the inside.

Japanese Patent No. 3078452 JP-A-11-77619 JP-A-2005-153364

  When wood is compression-molded as described above, it is common to cut the wood to be compressed from the raw wood by cutting or the like, but the wood may be cut in the middle of forming, so the stage of the raw wood If the flame retardant treatment is applied, the flame retardant liquid may not penetrate into the surface of the compressed wood that is the molded product, or the penetration depth of the flame retardant liquid may become uneven. In some cases, the treatment liquid had to be infiltrated. In order to solve this problem, a method of injecting or impregnating the flame-retardant treatment liquid into the molded compressed wood is also conceivable. However, since the surface of the compressed wood is hardened compared to before compression, the flame-retardant treatment liquid However, there was a risk that it would not penetrate as much as necessary and sufficient to make the compressed wood flame-retardant.

  The present invention has been made in view of the above, and it is possible to process a wood that can easily penetrate a predetermined portion of wood to be subjected to compression molding with a flame-retardant treatment solution necessary and sufficient for flame-retarding. It aims at providing the exterior body for electronic devices formed by the method and the processing method of the said timber.

  In order to solve the above-described problems and achieve the object, the invention according to claim 1 is a wood processing method for processing wood with a pair of molds, wherein at least one of the pair of molds is A flame retardant treatment liquid attaching step for attaching a flame retardant treatment liquid that is liquid at a temperature of 5 to 35 ° C. to the entire surface that is in contact with the surface of the wood, and the flame retardant treatment liquid is attached A compression step of applying a compression force by sandwiching the wood in a steam atmosphere at a higher temperature and pressure than the atmosphere by using the pair of molds including the molds, and the flame retardant treatment liquid is It is characterized by being liquid or solid in the atmosphere in which the compression step is performed.

  The invention according to claim 2 is the invention according to claim 1, wherein the compression step heats at least one of the pair of molds until reaching a temperature higher than a carbonization temperature of the wood, The wood is compressed using a heated mold, and the surface of the wood that contacts the heated mold is carbonized.

  According to a third aspect of the present invention, in the invention of the second aspect, the mold heated in the compression step is a mold to which the flame retardant treatment liquid is adhered in the flame retardant treatment liquid adhesion step. Features.

  Invention of Claim 4 has the carbonization process which carbonizes at least one surface of the said wood in invention of Claim 1, and performs the said carbonization process as a process different from the said compression process, To do.

  Invention of Claim 5 is the exterior body for electronic devices which arm | covers an electronic device, Comprising: It formed by the processing method of the wood as described in any one of Claims 1-4, It is characterized by the above-mentioned.

  According to the present invention, the temperature of the surface of at least one of the pair of molds for processing wood, which is in contact with the surface of the wood, is liquid at 5 to 35 ° C. By using the flame retardant treatment liquid attaching step for attaching the flame retardant treatment liquid and the pair of molds including the mold to which the flame retardant treatment liquid is attached, the wood is placed in a steam atmosphere at a higher temperature and pressure than the atmosphere. A compression step of sandwiching and applying a compressive force, and the flame-retardant treatment liquid is a liquid or a solid in an atmosphere in which the compression step is performed, so that a predetermined portion of wood to be subjected to compression molding, It is possible to easily infiltrate the flame retardant treatment necessary and sufficient for flame retardancy.

  The best mode for carrying out the present invention (hereinafter referred to as “embodiment”) will be described below with reference to the accompanying drawings.

(Embodiment 1)
In the wood processing method according to Embodiment 1 of the present invention, first, wood having a predetermined shape is formed from raw wood. FIG. 1 is a diagram schematically showing an outline of this shaping process. The wood 1 shown in the figure is formed by cutting or the like from an uncompressed solid wood 10 (having a grain 10G) that is a raw wood, and has a flat main plate portion 1a having a substantially rectangular surface, and the main plate portion. Two side plate portions 1b extending from each of two sides substantially parallel to the longitudinal direction of the surface 1a at a predetermined angle with respect to the surface of the main plate portion 1a, and 2 substantially parallel to the short direction of the surface of the main plate portion 1a Two side plate portions 1c extending from each of the sides at a predetermined angle with respect to the surface of the main plate portion 1a are formed in a dish shape (including shapes such as a bowl shape, a shell shape, and a box shape). This wood 1 has a volume obtained by adding in advance a volume to be reduced by a compression process described later.

  In the case shown in FIG. 1, the shaping is performed so that the longitudinal direction of the wood 1 formed from the solid material 10 and the fiber direction L of the wood 1 are substantially parallel and the surface of the main plate portion 1a forms a grid surface. But this is just an example. In addition, the longitudinal direction of the wood 1 can be shaped so that the longitudinal direction of the wood 1 is substantially parallel to the fiber direction L of the wood 1 and the surface of the main plate portion 1a forms a plate surface and a tracking surface. Further, the wood 1 can be shaped so that the longitudinal direction of the wood 1 is substantially perpendicular to the fiber direction L of the wood and the surface of the main plate portion 1a forms a mouth end surface. In this way, how the wood is shaped from the raw wood is determined according to conditions such as strength and aesthetics required for the wood. In view of such circumstances, in the drawings referred to in the following description, the description is omitted.

  Solid wood 10 is selected from cypress, hiba, cedar, paulownia, pine, cherry blossom, cocoon, ebony, bamboo, teak, mahogany, rosewood, etc. according to the use of the processed wood. do it. In addition, when taking wood from raw wood, it may be shaped like a flat plate.

  2 is a diagram showing a configuration of a mold used in the wood processing method according to the first embodiment and a state before the wood 1 is compressed, and FIG. 3 is a cross-sectional view taken along line AA of FIG. is there. As shown in these drawings, the wood 1 is sandwiched between a pair of molds 51 and 61, and a compressive force is applied thereto.

  Of the pair of molds, a mold 51 for applying a compressive force from above the wood 1 during compression is a shape that rises from the main plate portion 1a of the wood 1 to the side plate portions 1b and 1c and fits to the curved inner surface that curves. It is a core metal mold | die provided with the convex part 52 which makes | forms. On the surface of the convex portion 52 (the surface of the mold that comes into contact with the surface corresponding to the inside of the plate among the surface of the plate-shaped wood 1), the flame-retardant treatment liquid 21 that makes the wood flame-retardant is attached. . When the curvature radius of the curved surface that abuts the curved surface 1ab of the convex portion 52 is RA, and the curvature radius of the curved inner surface of the curved surface 1ab that rises from the main plate portion 1a to the side plate portion 1b among the inner surfaces of the wood 1 is RI, These two radii of curvature satisfy the relationship RI> RA.

  A mold 61 for applying a compressive force from below the wood 1 during compression is a cavity mold provided with a concave portion 62 into which the curved outer surface rises from the main plate portion 1a of the wood 1 to the side plate portions 1b and 1c. is there. If the curvature radius of the curved surface that contacts the outer surface of the curved surface 1ab of the concave portion 62 is RB, and the curvature radius of the outer surface of the curved surface 1ab that rises from the main plate portion 1a of the wood 1 to the side plate portion 1b is RO, these two The radius of curvature satisfies the relationship RO> RB.

  In the wood processing method according to the first embodiment, before sandwiching the wood 1 between the mold 51 and the mold 61 having the above-described configuration, the room temperature (about 5 to 35 ° C.) or higher. The flame-retardant treatment liquid 21 is adhered to the surface of the convex portion 52 of the mold 51 in a state having a high temperature (about 100 ° C.) (a flame-retardant treatment liquid adhesion step). The flame retardant treatment liquid 21 may be a liquid when it is attached to at least the surface of the convex portion 52. Thereby, when attaching the flame retardant treatment liquid 21 to the surface of the convex portion 52, the flame retardant treatment liquid 21 may be applied by a brush or a roller, or the flame retardant treatment liquid 21 may be sprayed by spraying. It becomes possible to carry out the flame-retardant treatment liquid adhesion step easily and quickly.

  Specifically, the flame retardant treatment liquid 21 is usually used as a boron-based compound (borax, boric acid, sodium octaborate, etc.), ammonium salt (ammonium diphosphate, ammonium sulfate, etc.), or guanidine sulfamate. It is an aqueous solution of a flame retardant.

  Here, the case where the flame retardant treatment liquid 21 is attached to the convex portion 52 of the mold 51 has been described, but the flame retardant treatment liquid 21 may be attached to the concave portion 62 of the mold 61. In addition, the same or different types of flame retardant treatment liquid may be attached to each of the convex portion 52 of the mold 51 and the concave portion 62 of the mold 61.

  Next, the compression process of the wood 1 performed using the metal mold | die 51 which the flame-retardant processing liquid 21 adhered as mentioned above and the metal mold | die 61 which makes this metal mold | die 51 a pair is demonstrated. When performing this compression step, the wood 1 is left in a steam atmosphere at a higher temperature and higher pressure than the atmosphere for a predetermined time, so that moisture is excessively absorbed and softened. The high temperature and high pressure here means a temperature of 100 to 230 ° C., more preferably 150 to 230 ° C., still more preferably about 180 to 200 ° C., and a pressure of 0.1 to 3.0 MPa (megapascal), more preferably. Indicates a state of about 0.45 to 2.5 MPa, more preferably about 1.0 to 1.6 MPa. Instead of leaving the wood 1 to be softened in the water vapor atmosphere described above, for example, the wood 1 may be heated and softened by high-frequency electromagnetic waves such as microwaves.

  Thereafter, the wood 1 is compressed in the same steam atmosphere as described above. In FIG. 4, after the softened wood 1 is placed at a predetermined position, the mold 51 is lowered to sandwich the wood 1 with the mold 61, and a predetermined compressive force is applied to the sandwiched wood 1. It is a figure which shows the state which has added, and is a figure which shows the state which the deformation | transformation by the compressive force of the timber 1 was substantially completed. As shown in FIG. 4, the wood 1 is deformed into a three-dimensional shape corresponding to the gap between the mold 51 and the mold 61 by receiving a compressive force from the molds 51 and 61. At this time, the flame retardant treatment liquid 21 adhering to the surface of the convex portion 52 gradually permeates into the surface layer of the inner surface of the wood 1 by receiving a compressive force.

  5 and 6 are diagrams schematically showing part of the surface layer of the wood 1 before and after the flame-retardant treatment liquid 21 penetrates the wood 1, and more specifically, the wood 1 is a conifer ( It is a figure which shows typically the cross section perpendicular | vertical to the fiber direction L of the surface layer of the timber 1 before compression (FIG. 5) and after compression (FIG. 6) in the case of cypress, cypress, etc. As shown in these drawings, the wood 1 has a temporary conduit T which is surrounded by a cell wall W and is continuous, and this temporary conduit T has a relatively large opening in the state before compression shown in FIG. .

  On the other hand, in the state after compression shown in FIG. 6, the cell wall W is crushed in the compression direction, and the opening of the temporary conduit T is slit. The flame-retardant treatment liquid 21 forms a flame-retardant treatment liquid-impregnated portion F mainly by penetrating into the appropriate depth range from the surface of the wood 1 through such a slit temporary conduit T. For this reason, the flame retardant treatment liquid 21 that has penetrated into the surface layer of the wood 1 remains inside the temporary conduit T even after the wood 1 is dried. At this time, the water contained in the flame retardant treatment liquid 21 evaporates, and only the flame retardant may remain inside the temporary conduit T. In addition, when the timber 1 is a broad-leaved tree (paulownia, firewood, etc.), the conduit plays the role of the temporary conduit T described above.

  In the compression step, after applying a compressive force to the wood 1 for a predetermined time (1 to several tens of minutes, more preferably about 5 to 10 minutes), the water vapor atmosphere is released to dry the wood 1, and the mold 51 and the mold 61 is separated to release the compression. As a result, the thickness of the wood 1 is about 30 to 50% of the thickness before the compression step.

  When the mold 51 is moved up and down relatively with respect to the mold 61 in the compression process described above, at least one of the molds 51 and 61 is electrically driven using an appropriate driving means. Alternatively, the mold 51 and the mold 61 may be coupled with a screw, and the mold 51 may be moved up and down with respect to the mold 61 by manually or automatically tightening the screw.

  Note that, as a result of the compression process, if there is molding unevenness or molding error on the end face or the like of the wood 1, an appropriate end face treatment may be performed by cutting or polishing.

  FIG. 7 is a perspective view showing a configuration of a compressed wood product formed by the wood processing method according to the first embodiment. FIG. 8 is a longitudinal sectional view schematically showing a cross section taken along line BB in FIG. The compressed wood product 2 shown in FIG. 7 and FIG. 8 includes a main plate portion 2a, two side plate portions 2b, and two side plate portions 2b corresponding to the main plate portion 1a, the two side plate portions 1b, and the two side plate portions 1c of the wood 1, respectively. A side plate portion 2c is provided. Moreover, the flame retardant which has sufficient penetration depth necessary and sufficient for a flame retardant by impregnating the inner surface which curves from the main board part 2a and reaches each of the side board parts 2b and 2c with the flame retardant treatment liquid 21 A treatment liquid impregnated portion F is formed. The penetration depth of the flame retardant treatment liquid impregnation portion F varies depending on the thickness of the compressed wooden product 2, the compression rate, the density of the wood, and the like. For example, if the penetration depth of the flame retardant treatment liquid impregnated portion F is set to a value larger than the depth of scratches that may be received when the compressed wood product 2 is used, the flame retardant is caused by the scratches. This is more preferable because the characteristics of the treatment liquid 21 are not lost.

  In FIG. 8, the flame-retardant treatment liquid impregnation portion F is described as if it is an individual region separated from the wood, but this is because FIG. 8 is a schematic diagram, and the actual flame-retardant treatment is performed. As described with reference to FIG. 6, the liquid impregnation portion F is formed by the penetration of the flame retardant treatment liquid 21 into the conduit surrounded by the cell wall or the temporary conduit.

  FIG. 9 is a view showing an application example of the compressed wood product 2, and more specifically, a perspective view showing an external configuration of a digital camera covered with a cover member formed from the compressed wood product 2. A digital camera 101 shown in FIG. 1 includes an image pickup unit 102 including an image pickup lens, a flash 103, and a shutter button 104, and is packaged by two cover members 3 and 4.

  10 is a diagram showing an internal configuration of the digital camera 101, and is a cross-sectional view taken along the line CC of FIG. Inside the digital camera 101, a display unit 105 implemented using a liquid crystal display, a plasma display, an organic EL (Electroluminescence) display or the like to display image information or character information, a CCD (Charge Coupled Device), or the like. In addition to the image pickup element 106, a control circuit having a CPU (Central Processing Unit) for performing drive control and various calculations related to image pickup processing, and a drive circuit for driving each functional member under the control of the control circuit are housed. Has been. In FIG. 10, the various functional members having the electronic or optical functions described above are schematically shown in a region D (indicated by a broken line) inside the digital camera 101.

  In the case shown in FIG. 10, the cover member 3 that covers the front side of the digital camera 101 is formed with an opening 31 that exposes the imaging unit 102, while the cover member 4 that covers the back side of the digital camera 101 is formed. Is formed with a rectangular parallelepiped opening 41 that exposes the display unit 105. These openings 31 and 41 may be formed collectively when the wood 1 as the raw material of the cover members 3 and 4 is formed from the solid material 10, or after the compression process of the wood 1 is performed, You may form by perforation etc.

  For example, in the case where the side surface of the opening 31 is also impregnated with the flame retardant treatment liquid 21, an opening serving as a prototype of the opening 31 is formed in the wood 1 before performing the compression step, A mold may be formed so that the side surface of the original mold is impregnated with the flame retardant treatment liquid 21 (the same applies when the side surface of the opening 41 is impregnated with the flame retardant treatment liquid 21). Specifically, the mold may be formed so as to have a portion that contacts the original side surface of the opening during compression, and the flame retardant treatment liquid 21 may be attached to the surface of the portion.

  Further, the cover member 3 or 4 may be further provided with an opening or notch for attaching a finder or exposing an operation instruction input button, or an interface for connection to an external device (DC input). (Including a terminal, a USB connection terminal, and the like) may be further provided. Moreover, in order to output the sound which the speaker provided in the inside of the digital camera 101 produces | generates outside with respect to the cover member 3 or 4, you may provide further the audio | voice output hole part which consists of several small holes.

  According to the first embodiment of the present invention described above, the temperature is applied to the entire surface of the surface of at least one of the pair of molds for processing wood that is in contact with the surface of the wood. By using the flame retardant treatment liquid adhering step for adhering a flame retardant treatment liquid that is liquid at 5 to 35 ° C. and the pair of molds including the mold to which the flame retardant treatment liquid is adhered, the temperature and pressure are higher than the atmosphere. A compression process in which the wood is sandwiched in a water vapor atmosphere and compressive force is applied, and the flame-retardant treatment liquid is liquid or solid in the atmosphere in which the compression process is performed, so that the wood is subjected to compression molding It is possible to easily infiltrate the predetermined part of the flame retardant treatment liquid necessary and sufficient for flame retardancy.

  Further, according to the first embodiment, since the flame retardant treatment liquid is impregnated while compressing the wood, the flame retardant treatment solution can be more reliably fixed to the surface of the wood, which is difficult for a long time. It can be expected to exert a flame effect.

  Furthermore, according to the first embodiment, the outer side surface of the wood that has a dish shape as a three-dimensional shape is closely compressed along the surface of the smooth mold, and is compressed by contacting the mold. Since the flame-retardant treatment liquid impregnation part is uniformly formed on at least one surface of the wood, an electronic device that may ignite by any chance like a digital camera with a high-voltage strobe circuit inside. It is suitable as an exterior body for equipment.

  By the way, the inner surface of the compressed wood product processed by the wood processing method according to Embodiment 1 may be carbonized by a gas burner or the like. FIG. 11 is a cross-sectional view showing the configuration of the compressed wood product after the carbonization step is completed, and is a vertical cross-sectional view when viewed from the same cut surface as FIG. The compressed wood product 5 shown in FIG. 11 has a carbonized layer Cb formed on the inner surface thereof in addition to the flame-retardant treatment liquid impregnated portion F. According to the compressed wood product 5 having such a configuration, it is made flame-retardant by the flame-retardant treatment liquid impregnated portion F, and electromagnetic waves propagating from the outside can be shielded by the carbonized layer Cb. It is more preferable when applied as an exterior body. In addition, you may perform the carbonization process demonstrated here with respect to the wood 1 before compression.

(Embodiment 2)
FIG. 12 is a diagram showing an outline of the compression step in the wood processing method according to Embodiment 2 of the present invention. In the second embodiment, the wood 1 shaped from the solid material 10 is sandwiched between the pair of molds 71 and 61 in the same manner as the wood processing method according to the first embodiment, and a compression force is applied. . Among these, the metal mold 71 for applying compressive force to the wood 1 from above is a core metal mold having a convex part 72 protruding downward, and a heater 73 for heating the metal mold 71 is provided inside the convex part 72. Is installed. Further, the flame-retardant treatment liquid 21 is attached to the surface of the convex portion 72 (the surface of the mold that comes into contact with the surface corresponding to the inside of the plate among the surface of the wood 1 having a dish shape). Of these, the heater 73 is connected to a control device 81 having a temperature control function. The mold 61 has the configuration as described in the first embodiment.

  When the wood 1 is compressed, the wood 1 is sandwiched between the molds 71 and 61 and a predetermined compressive force is applied. Under the control of the control device 81, the mold 71 is heated to the carbonization temperature of the wood 1 (generally 350). It is heated by the heater 73 until reaching a temperature higher than about (° C.). As a result, the wood 1 is compression-molded into a predetermined dish shape, and the inner side surface of the wood 1 in contact with the convex portion 72 of the mold 71 heated to a temperature higher than the carbonization temperature is carbonized.

  FIG. 13 is a diagram showing a state in which the deformation of the wood 1 is almost completed in the carbonization step. When a predetermined time elapses in this state, the flame retardant treatment liquid 21 penetrates into the inner surface of the wood 1 as in the first embodiment. In addition to this, since the temperature of the mold 71 is higher than the carbonization temperature of the wood 1, a carbonized layer is formed on the inner side surface of the wood 1 that abuts against the convex portion 72 of the mold 71. Therefore, in the wood processing method according to the second embodiment, in the compression step, wood is carbonized together with wood compression and flame retardancy.

  The wood 1 after the compression step is the same as the compressed wood product 5 shown in FIG. 11, and the flame-retardant treatment liquid impregnated portion F and the carbonized layer Cb are formed. However, in the second embodiment, since the flame retardant treatment and the carbonization treatment are performed in parallel, the flame retardant treatment liquid-impregnated portion F and the carbonized layer Cb are layered as shown in FIG. The flame retardant treatment liquid impregnated portion F and the carbonized layer Cb are not necessarily included, and may be mixed in the surface layer on the inner surface of the compressed wood product 5.

  According to the second embodiment of the present invention described above, the same effect as in the first embodiment can be obtained.

  Further, according to the second embodiment, in the compression step, at least one of the pair of dies for wood processing is heated until reaching a temperature higher than the carbonization temperature of the wood, and the heated dies While compressing wood using a mold and carbonizing the surface of the wood that comes into contact with the heated mold, it is possible to carry out the compression, flame retardant, and carbonization treatments of the wood all at once. Therefore, a compressed wood product suitable as an exterior body for electronic equipment can be manufactured with much fewer man-hours, and the productivity of the compressed wood product can be improved.

  Furthermore, according to the second embodiment, the flame-retardant treatment liquid impregnated portion and the carbonized layer are formed on the inner surface of the dish-shaped compressed wood product, so that it can be seen from the outside, particularly like an exterior body for electronic equipment. This is suitable when it is desired to provide a carbonized layer in a non-existing location. In addition, when the flame retardant treatment liquid is also infiltrated into the inner surface, for example, when decorating the outer surface of the compressed wood product, it is not necessary to consider the influence of the flame retardant treatment solution. In general, the flame-retardant treatment liquid-impregnated portion and the carbonized layer may be provided on different surfaces.

  In addition, since the carbonized layer generally has flame retardancy per se, when the carbonization step is performed before the flame retardant treatment in the first embodiment, or when the carbonization step is performed simultaneously with the flame retardant treatment as in the second embodiment. In the case of carrying out, since the carbonized layer bears a part of the flame retardant effect, it is possible to ensure the same flame retardant effect even if the impregnation depth of the flame retardant treatment liquid is relatively shallow.

  Although the best mode for carrying out the present invention has been described in detail as the first and second embodiments, the present invention should not be limited only by these two embodiments. For example, the exterior body for an electronic device formed by the wood processing method according to the present invention is a small portable electronic device other than a digital camera, for example, a mobile communication terminal such as a mobile phone, PHS or PDA, or a mobile audio device. It can also be applied to exterior bodies such as IC recorders, portable televisions, portable radios, remote controls for various home appliances, and digital videos.

  Thus, the present invention can include various embodiments and the like not described herein, and various design changes and the like can be made without departing from the technical idea specified by the claims. It is possible to apply.

It is a figure which shows typically the shaping process in the processing method of the timber which concerns on Embodiment 1 of this invention. It is a figure which shows the state before compressing the structure of the metal mold | die used in the processing method of the timber which concerns on Embodiment 1 of this invention, and timber. It is the sectional view on the AA line of FIG. It is sectional drawing which shows the state which has substantially completed the deformation | transformation of the timber in the compression process of the processing method of the timber which concerns on Embodiment 1 of this invention, and is compressed. It is a figure which shows typically the structure of the cross section perpendicular | vertical to the fiber direction of the timber before compression of the compressed wood product formed by the processing method of the timber which concerns on Embodiment 1 of this invention. It is a figure which shows typically the structure of the cross section perpendicular | vertical to the fiber direction of the timber after compression of the compressed wood product formed by the processing method of the timber which concerns on Embodiment 1 of this invention. It is a perspective view which shows the structure of the compression wooden product formed by the processing method of the timber which concerns on Embodiment 1 of this invention. It is the BB sectional view taken on the line of FIG. It is a perspective view which shows the external appearance structure of the digital camera which applied the compression wooden product formed by the processing method of the wood which concerns on Embodiment 1 of this invention as an exterior body. It is CC sectional view taken on the line of FIG. It is a figure which shows the structure of the compression wood product after carbonizing the inner surface of a compression wood product. It is a figure which shows the outline | summary of the compression process in the processing method of the timber which concerns on Embodiment 2 of this invention. It is a figure which shows the state which has substantially completed the deformation | transformation of the timber in the compression process of the processing method of the timber concerning Embodiment 2 of this invention, and is compressing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wood 1a, 2a, 3a, 4a Main board part 1b, 1c, 2b, 2c, 3b, 3c, 4b, 4c Side board part 1ab Curved surface 2, 5 Compression wood product 3, 4 Cover member (exterior body for electronic devices)
10 Solid Wood 10G Wood 21 Flame Retardant Solution 31, 41 Opening 51, 61, 71 Mold 52, 72 Convex 62 Concave 73 Heater 81 Controller 101 Digital Camera (Electronic Equipment)
DESCRIPTION OF SYMBOLS 102 Image pick-up part 103 Flash 104 Shutter button 105 Display part 106 Image pick-up element Cb Carbonization layer F Flame-retardant process liquid impregnation part L Fiber direction T Temporary conduit W Cell wall

Claims (5)

In the wood processing method of processing wood with a pair of molds,
Flame retardant in which a flame retardant treatment liquid that is liquid at a temperature of 5 to 35 ° C. is attached to the entire surface of at least one of the pair of molds that is in contact with the surface of the wood. A treatment liquid adhesion step;
By using the pair of molds including the mold to which the flame retardant treatment liquid is attached, a compression step of sandwiching the wood in a steam atmosphere at a temperature higher than that of the atmosphere and applying a compression force;
Have
The method for processing wood, wherein the flame retardant treatment liquid is liquid or solid in an atmosphere in which the compression step is performed.   In the compression step, at least one of the pair of molds is heated until reaching a temperature higher than a carbonization temperature of the wood, the wood is compressed using the heated mold, and the wood 2. The method for processing wood according to claim 1, wherein the surface of the metal that contacts the heated mold is carbonized.   The wood processing method according to claim 2, wherein the mold heated in the compression step is a mold to which the flame retardant treatment liquid is attached in the flame retardant treatment liquid adhesion step.   The wood processing method according to claim 1, further comprising a carbonization step of carbonizing at least one surface of the wood, wherein the carbonization step is performed as a step different from the compression step. An electronic device exterior body for packaging an electronic device,
An exterior body for electronic equipment, which is formed by the wood processing method according to any one of claims 1 to 4.

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