JP4328331B2 - Core mold, cavity mold, and wood processing equipment - Google Patents

Description

  The present invention relates to a core mold, a cavity mold, and a wood processing apparatus used when wood is compression-molded.

  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).

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

  However, in the above-described conventional wood processing technology, when the wood grain is preferentially shaped so that the wood surface forms a desired grain, the shape may deviate greatly from the shape of the formwork. In such a case, the shape of the shaped wood had to be greatly deformed, and the wood was easily cracked during compression. That is, when the shape change of wood due to compression is large, it has been difficult to form the wood without causing cracks.

  The present invention has been made in view of the above, and a core mold and a cavity mold that can be molded without causing cracks in the wood even when the shape change before and after the compression of the wood is large. An object is to provide a mold and a wood processing apparatus.

  In order to solve the above-described problems and achieve the object, the invention described in claim 1 is a core mold that abuts against the surface of the wood and applies a compression force when processing the wood, and has a column shape. Projecting from the side surface of the core body portion and the core body portion having the columnar shape, abutting at least a part of the end surface of the wood when processing the wood, in a direction substantially orthogonal to the thickness direction of the abutting end surface A plurality of end surface pressing portions for applying a compressive force; and a shape protruding from any one of the surfaces of the core main body portion and the surfaces orthogonal to the side surfaces of the core main body portion from which the plurality of end surface pressing portions protrude; And a first surface pressing portion that applies a compressive force by contacting the surface of the wood when the wood is processed.

  The invention according to claim 2 is the invention according to claim 1, wherein the first main surface pressing portion of the core main body portion is on the surface on which the core main body portion protrudes, and the outer periphery of the surface and the first front pressing portion are An end face different from the end face formed by the end face pressing portion coming into contact with the wood when the wood is processed is formed in a closed band shape having a uniform width in a region between An end surface forming portion to be formed is further provided.

  According to a third aspect of the present invention, in the second aspect of the present invention, the width of the end surface forming portion having a band shape is 50% or more of the thickness of the end surface formed by compression.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, a film-like lubricating means is provided on the surface of the end face pressing portion.

  According to a fifth aspect of the invention, in the invention according to any one of the second to fourth aspects, a film-like lubricating means is provided on the surface of the end face forming portion.

  The invention according to claim 6 is a cavity mold for applying a compressive force by abutting against the surface of the wood when processing the wood, wherein the cavity main body having a columnar shape and the height of the cavity main body having the columnar shape are provided. A mortar-shaped opening having an opening end on one of the surfaces orthogonal to the height direction, and a sectional area of the opening cross section orthogonal to the height direction gradually decreasing from the opening end along the height direction. And a guide part in which a plurality of notches are formed on the slope of the mortar-shaped opening, and a shape indented in a direction opposite to the opening end from the bottom surface where the cross-sectional area of the guide part is the smallest. And a second surface pressing portion that applies a compressive force in contact with the surface of the wood when the wood is processed.

  The invention according to claim 7 is the invention according to claim 6, characterized in that a film-like lubricating means is provided on the surface of the guide portion.

  A wood processing apparatus according to an eighth aspect of the present invention includes the core mold according to any one of the first to fifth aspects, and the cavity mold according to the sixth or seventh aspect, wherein the core mold is When approaching the cavity mold, each of the plurality of end surface pressing portions is fitted into one of the plurality of notches formed in the guide portion.

  According to the present invention, a plurality of end face pressings that protrude from the side surface of the core body portion having a columnar shape, abut against at least a part of the end face of the wood, and apply a compressive force in a direction substantially perpendicular to the thickness direction of the abutting end face. And a shape projecting from any one of the surface of the core body part and the surface orthogonal to the side surface of the core body part from which the plurality of end face pressing parts project, and when processing the wood, A core mold having a first surface pressing portion that abuts against the surface of the wood and applies a compressive force; and an opening end on one of the surfaces perpendicular to the height direction of the columnar cavity main body portion The cross-sectional area of the opening cross section perpendicular to the height direction forms a mortar-shaped opening that gradually decreases from the opening end along the height direction, and a plurality of notches are formed on the slope of the mortar-shaped opening. Formed guide part and front A cavity provided with a second surface pressing portion that forms a shape that is recessed from the bottom surface having the smallest cross-sectional area of the guide portion in a direction opposite to the opening end and that abuts against the surface of the wood and applies a compressive force By configuring the wood processing apparatus using a mold, it is possible to form the wood without causing cracks even when the shape change before and after compression of the wood is large.

  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)
FIG. 1 is a diagram showing a configuration of a main part of the wood processing apparatus according to Embodiment 1 of the present invention. The wood processing apparatus 1 shown in the figure includes a core mold 2 that applies a compressive force to the wood from above the wood to be processed, and a cavity metal that applies a compressive force to the wood from below the wood to be processed. A mold 3 is provided.

  The core mold 2 protrudes in a rectangular parallelepiped shape from a side surface of the core main body 21 and a core main body 21 having a substantially rectangular parallelepiped shape (columnar shape), and hits at least a part of the end surface of the wood when processing the wood. A plurality of end surface pressing portions 22 (six in FIG. 1) that apply compressive force in a direction substantially perpendicular to the thickness direction of the abutting end surface, and a side surface of the core main body portion 21 from which the plurality of end surface pressing portions 22 protrude. And a convex portion 23 (first surface pressing portion) that abuts against the surface of the wood and applies a compressive force when the wood is processed.

  The cavity mold 3 has an open end on one of the cavity main body 31 having a rectangular parallelepiped shape and the surface orthogonal to the height direction of the cavity main body 31 (upper surface in FIG. 1). A mortar-shaped opening whose opening cross section parallel to the height gradually decreases in the height direction (bottom direction in FIG. 1), and a plurality of notches 33 (six in FIG. 1) are formed on the slope of the mortar-shaped opening. And a concave portion 34 that is indented from the bottom surface of the guide portion 32 in a direction opposite to the opening end (vertically downward in FIG. 1) and that abuts against the surface of the wood and applies a compressive force. (Second surface pressing portion).

  A press machine (not shown) is connected to the core mold 2 and can move up and down with respect to the cavity mold 3. When the core mold 2 is moved up and down relatively with respect to the cavity mold 3, at least one of the core molds 2 and 3 is electrically driven by using an appropriate driving means. Alternatively, the core mold 2 and the cavity mold 3 may be coupled with a screw, and the core mold 2 may be moved up and down relative to the cavity mold 3 by manually or automatically tightening the screw. It may be.

  FIG. 2 is a perspective view showing a configuration of a processing target wood to be compression-molded using the wood processing apparatus 1 having the above configuration. FIG. 3 is a cross-sectional view taken along the line CC of FIG. 2, and is a view seen from the upside down of FIG. The wood 11 shown in these figures has a substantially bowl-like shape, and is formed by cutting or the like from an uncompressed solid material that is a raw wood, and has a substantially uniform wall thickness. The two surfaces form a plate surface having an arcuate cross-sectional shape. In the following description, the surface having the longer arc length (upper surface side in FIG. 2) is referred to as the outer surface 11a, and the surface having the shorter arc length is referred to as the inner surface 11b. Moreover, the surface which makes the belt | band | zone shape located in the boundary of the outer surface 11a and the inner surface 11b of the timber 11 and making a round is called the end surface 11c. The wood 11 has a volume obtained by adding in advance a volume that is reduced by compression using the wood processing apparatus 1. 2 is substantially the same shape as the CC line cross section shown in FIG. 3 except that the dimensions are different.

  FIG. 4 is a diagram schematically showing a shaping position when shaping the wood 11 having the above configuration, and more specifically, a shaping position from the solid material of the cross-sectional portion shown in FIG. FIG. In order for the surface of the wood 11 to have a grain surface as shown in FIG. 2, it is shaped so that the curvature of the side surface of the wood 11 is generally larger than the curvature of the wood grain G as shown in FIG. 4. As the solid material 10, cypress, hiba, cedar, paulownia, pine, cherry blossom, cocoon, ebony, bamboo, teak, mahogany, rosewood, or the like can be used.

  In addition, the wood 11 may be other than the grain material, and may be, for example, a mesh material, a memorial material, a mouthpiece material or the like. That is, how to form the wood to be processed from the solid wood 10 depends on the use of the compressed wood product as a result of processing using the wood, and various strengths and aesthetics required for the compressed wood product. What is necessary is just to determine in consideration of conditions.

  Next, a compression process in which the wood 11 shaped as described above is compressed by the wood processing apparatus 1 will be described. When compressing the wood 11, the wood 11 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. Such a water vapor atmosphere is realized, for example, inside the pressure vessel. Instead of leaving the wood 11 softened in the water vapor atmosphere described above, the wood 11 may be softened by heating with high-frequency electromagnetic waves such as microwaves.

  After the wood 11 is softened, the wood 11 is compressed in the same steam atmosphere as described above. First, the core mold 2 is lowered from the upper end opening surface of the guide portion 32. As described above, the guide portion 32 has a mortar shape, and a notch 33 corresponding to the end surface pressing portion 22 of the core mold 2 is formed on the slope of the mortar-shaped guide portion 32. Therefore, as the core mold 2 approaches and descends with respect to the cavity mold 3, the end surface pressing portion 22 of the core mold 2 is fitted into the notch 33 formed at the corresponding position.

  In FIG. 5A, when the wood 11 is arranged at a predetermined position of the cavity mold 3 and the core mold 2 is lowered from above the arranged wood 11, a part of the end surface 11 c of the wood 11 is the core mold 2. It is a figure which shows the state which began to contact the bottom face 22a of the end surface press part 22 of this, and is a sectional view equivalent to the AA line cross section of FIG. 6A is a view showing the same state as FIG. 5A and is a cross-sectional view corresponding to FIG. 2 (a cross section taken along line BB in FIG. 1). In the state shown in FIGS. 5A and 6A, the wood 11 is stationary with the outer edge of the end surface 11 c abutting against the slope of the guide portion 32.

  In the following description, the compression process of the wood 11 will be described while illustrating the state changes of the two cross sections shown in FIGS. 5A and 6A, respectively. That is, FIGS. 5B and 5C referred to in the following description are cross-sectional views taken along the same cut surface as FIG. 5A, and FIGS. 6B and 6C are cross-sectional views taken along the same cut surface as FIG. 6A. 5B and 6B are views of the same state viewed from different cross sections, and FIGS. 5C and 6C are also views of the same state viewed from different cross sections.

  When the core mold 2 is gradually lowered from the state shown in FIGS. 5A and 6A, the wood 11 is also bent while being gradually lowered. At this time, the end surface 11 c slides in the direction of the core body 21 along the bottom surface 22 a while increasing the contact area with the bottom surface 22 a of the end surface pressing portion 22. As the wood 11 descends, the outer surface 11a slides along the slope of the guide portion 32 while increasing the contact area with the slope of the guide portion 32 in the vicinity of the end portion. A compressive force is applied to a portion of the end surface 11c where the bottom surface 22a is in contact with the end surface 11c in a direction substantially perpendicular to the thickness direction of the end surface 11c, so that the wood 11 is gradually deformed by the compressive force.

  5B and 6B are views showing a state in the middle of the core mold 2 being lowered. In these drawings, the core mold 2 and the wood 11 are lowered as described above, and a state after the vicinity of the center portion of the outer surface 11a of the wood 11 is in contact with the concave portion 34 of the cavity mold 3 is shown. ing. In this way, when the wood 11 comes into contact with the concave portion 34 of the cavity mold 3 from the vicinity of the center portion of the outer surface 11 a, it is possible to prevent a large tensile force that causes cracking or the like from acting on the wood 11. Can do.

  Note that a film-like lubricating means made of Teflon (registered trademark), an oil-based lubricant, a lubricating sealant containing molybdenum, or the like may be provided on the bottom surface 22a of the end surface pressing portion 22 or the slope of the guide portion 32. By providing such a lubrication means, the wood 11 can be slid more smoothly, and it is possible to more reliably prevent cracking when the wood 11 descends.

  Thereafter, when the core mold 2 is further lowered, the region where the compressive force acts on the wood 11 gradually expands, the gap between the outer surface 11a and the cavity mold 3, and the inner surface 11b As the gap with the core mold 2 gradually decreases, the thickness of the wood 11 gradually decreases due to the action of the compressive force.

  5C and 6C are views showing a state in which the lowering of the core mold 2 is finished and the deformation of the wood 11 is almost completed. In the state shown in these drawings, the bottom surface 22a and the end surface 11c of the end surface pressing portion 22 face each other and are in contact with no gap, while the convex portion 23 and the inner side surface 11b and the concave portion 34 and the outer surface 11a are in contact with each other without a gap. ing. By continuing such a state for a predetermined time (1 to several tens of minutes, more preferably about 5 to 10 minutes), a portion of the wood 11 sandwiched between at least the end surface pressing portion 22 and the recess 34 (see FIG. 5C) can be transformed into a predetermined shape.

  On the other hand, since the end surface 11c shown in FIG. 6C is not pressed by the end surface pressing portion 22, it has the same shape as FIG. (The case where the end surface 11c is located slightly above the end surface 11c shown in FIG. 5C is not limited.) In such a case, the unevenness of the end face 11c may be leveled by performing an appropriate end face treatment such as cutting after compression.

  Thereafter, the water vapor atmosphere is released to dry the wood 11, and the core mold 2 and the cavity mold 3 are separated to release the compression. As a result, the thickness of the wood 11 after the compression process becomes substantially uniform, and is about 30 to 50% of the thickness of the wood 11 before the compression process.

  By the way, in FIG. 5C and FIG. 6C, although the clearance gap has arisen between the core metal mold | die 2 and the cavity metal mold | die 3, this is compression of the timber 11 by adjusting the stroke at the time of descending | lowering the core metal mold | die 2. It shows the amount of “play” secured to allow for later adjustment of the wall thickness. Therefore, if the thickness of the wood 11 is made thinner than that shown in the figure, the core mold 2 may be further lowered.

  In the compression process described above, when the end face pressing portion 22 presses the end face 11c to restrict the extension of the wood 11 in the direction orthogonal to the thickness direction, the shape change before and after the compression of the wood 11 is large. Even so, no tensile force acts on the wood 11 and the wood 11 can be deformed only by the compressive force. Therefore, it is possible to prevent the wood 11 from being cracked by the compression process.

  FIG. 7 is a perspective view schematically showing a configuration of a compressed wood product formed using the wood processing apparatus 1. FIG. 8 is a cross-sectional view taken along the line EE of FIG. The compressed wood products 12 shown in these two figures are dish-shaped and have a main plate portion 12a having a substantially rectangular surface and two main sides substantially parallel to the longitudinal direction of the surface of the main plate portion 12a. The two side plate portions 12b extending at a predetermined angle and the two sides substantially parallel to the lateral direction of the surface of the main plate portion 12a are extended at a predetermined angle with respect to the main plate portion 12a. And two side plate portions 12c. The surface of the main plate portion 12a forms the same surface as the outer surface 11a and the inner surface 11b of the wood 11 (see FIG. 2). The cross section taken along line FF in FIG. 7 is substantially the same shape as the cross section taken along line EE in FIG. 7 shown in FIG.

  In the first embodiment, the shape of the wood 11 before compression and the shape of the compressed wood product 12 after compression are not similar, and the shape change before and after compression is large. In order to prevent cracking of the wood 11 when performing such compression molding, it is also important to leave a degree of freedom that allows some of the wood components to escape into the open space. For example, it is better not to apply the compressive force by the end surface pressing portion 22 to a place where wood components gather from different directions due to compression, such as the boundary between the side plate portion 12b and the side plate portion 12c. However, it is more preferable to design the core mold 2 so that the end face pressing portion 22 does not come into contact with the end face pressing portion 22 from the viewpoint of preventing cracking of the wood 11. As described above, the number, size, shape, installation position, and the like of the end surface pressing portions 22 included in the core mold 2 may be determined according to the final shape of the wood to be processed.

  According to the first embodiment of the present invention described above, it protrudes from the side surface of the columnar core main body portion, abuts on at least a part of the end surface of the wood, and in a direction substantially perpendicular to the thickness direction of the abutting end surface. A plurality of end surface pressing portions for applying a compressive force; and a shape protruding from any one of the surfaces of the core main body portion and the surfaces orthogonal to the side surfaces of the core main body portion from which the plurality of end surface pressing portions protrude; A core mold provided with a convex portion (first surface pressing portion) that abuts against the surface of the wood and applies a compressive force, and a surface orthogonal to the height direction of the columnar cavity main body portion. A cross-sectional area of the opening cross section perpendicular to the height direction having an opening end forms a mortar-shaped opening gradually decreasing from the opening end along the height direction, and on the slope of the mortar-shaped opening Gas with multiple notches And a concave portion (second surface pressing) that applies a compressive force by abutting against the surface of the wood and having a shape indented in a direction opposite to the opening end from the bottom surface having the smallest cross-sectional area of the guide portion. Part)), and forming a wood processing apparatus using a cavity mold, the wood can be molded without causing cracks even when the shape of the wood before and after compression is large. It becomes possible.

  Further, according to the first embodiment, the end face pressing part in the core mold and the guide part in the cavity mold have a simple configuration, and they are formed of the same material as the core main body part and the cavity main body part, respectively. Therefore, it is possible to improve the durability of each mold and reduce the manufacturing cost.

(Embodiment 2)
FIG. 9 is a perspective view showing the configuration of the core mold according to the second embodiment of the present invention. The core mold 4 shown in FIG. 1 has a core body portion 41 having a substantially rectangular parallelepiped shape (columnar shape) and a rectangular parallelepiped shape protruding from the side surface of the core body portion 41, and at least the end face of the wood when processing the wood. A plurality of end surface pressing portions 42 (six in FIG. 9) that apply compression force in a direction substantially perpendicular to the thickness direction of the abutting end surface, and a core body from which the plurality of end surface pressing portions 42 protrude. A convex portion 43 (first surface pressing portion) which has a shape protruding from one surface orthogonal to the side surface of the portion 41 and applies a compressive force in contact with the surface of the wood when the wood is processed; 41 is formed on the surface on which the convex portion 43 protrudes, and is formed in a closed band shape having a uniform width in a region between the outer periphery of the surface and the convex portion 43, and processes wood. When the end face pressing portion 42 comes into contact with the wood at the time Comprises an end face forming portion 44 which forms a different end faces and.

  The wood processing apparatus according to the second embodiment includes a core mold 4 and the same cavity mold 3 as in the first embodiment (the cavity main body portion 31, the guide portion 32, the notch 33, and the second surface pressing portion. Having a recess 34). Also in the second embodiment, as the core mold 4 approaches the cavity mold 3 and descends in the notch 33 formed on the inclined surface of the mortar-shaped guide portion 32, the core mold The four end face pressing portions 42 are inserted into the notches 33 formed at the corresponding positions.

  In the following description, a case will be described in which the same wood 11 (see FIGS. 2 and 3) as that of the first embodiment is compression molded. The wood 11 is shaped from the solid material 10 in the same manner as in the first embodiment, and is allowed to stand for a predetermined time in the high-temperature and high-pressure steam atmosphere described above prior to the compression process, and softens by excessively absorbing moisture. Suppose you are.

  In FIG. 10A, when the wood 11 is arranged at a predetermined position of the cavity mold 3 and the core mold 4 is lowered from above, a part of the end surface 11 c of the wood 11 is the end face pressing portion 42 of the core mold 4. It is a figure which shows the state which started to contact the bottom face 42a, and is a sectional view equivalent to the GG line cross section of FIG. 11A is a view showing the same state as FIG. 10A in a cross section corresponding to the cross section taken along the line HH of FIG. In the state shown in FIGS. 10A and 11A, the wood 11 is stationary with the outer edge portion of the end surface 11 c in contact with the slope of the guide portion 32.

  Also in the second embodiment, the compression process of the wood 11 will be described while illustrating the state changes of the two cross sections shown in FIGS. 10A and 11A. That is, FIGS. 10B and 10C referred to below are cross-sectional views taken along the same cut surface as FIG. 10A, and FIGS. 11B and 11C are cross-sectional views taken along the same cut surface as FIG. 11A. 10B and FIG. 11B are views of the same state viewed from different cross sections, and FIGS. 10C and 11C are also views of the same state viewed from different cross sections.

  When the core mold 4 is gradually lowered from the state shown in FIG. 10A and FIG. 11A, the wood 11 is curved while being gradually lowered. At this time, the end surface 11 c slides in the direction of the core body 41 along the bottom surface 42 a while increasing the contact area with the bottom surface 42 a of the end surface pressing portion 42. As the wood 11 descends, the outer surface 11a slides along the slope of the guide portion 32 while increasing the contact area with the slope of the guide portion 32 in the vicinity of the end portion. A compressive force is applied to a portion of the end surface 11c where the bottom surface 42a is in contact with the end surface 11c in a direction substantially perpendicular to the thickness direction of the end surface 11c, so that the wood 11 is gradually deformed by the compressive force. At this stage, the wood 11 has not yet contacted the end face forming portion 44.

  FIG. 10B and FIG. 11B are views showing a state where the core mold 4 is being lowered. In these drawings, the core die 4 and the wood 11 are lowered as described above, and the state after the central portion of the outer surface 11a of the wood 11 is in contact with the concave portion 34 of the cavity die 3 is shown. ing. Also in the second embodiment, when the wood 11 comes into contact with the concave portion 34 of the cavity mold 3 from the vicinity of the center portion of the outer surface 11a, a large tensile force that causes cracking or the like acts on the wood 11. Can be prevented.

  Note that a film-like lubricating means may be provided on the bottom surface 42 a of the end surface pressing portion 42 and the inclined surface of the guide portion 32 as in the first embodiment. Thereby, the timber 11 can be slid more smoothly and it can prevent more reliably that a crack is produced when the timber 11 falls.

  Thereafter, when the core mold 4 is further lowered, the region where the compressive force acts on the surface of the wood 11 gradually expands, and the gap between the outer surface 11a and the cavity mold 3 and the inner surface As the gap between 11b and the core mold 4 gradually decreases, the thickness of the wood 11 gradually decreases due to the action of the compressive force. Furthermore, in the second embodiment, the inner surface 11b in the vicinity of the end surface 11c starts to come into contact with the end surface forming portion 44 in the middle of the lowering of the wood 11, and this end surface forming portion 44 starts from the edge of the wood 11 It gradually bites into the inner surface 11b.

  10C and 11C are views showing a state in which the lowering of the core mold 4 is finished and the deformation of the wood 11 is almost completed. 10C and 11C, there is a gap between the core mold 4 and the cavity mold 3, but this gap is the same as in the case of the wood processing apparatus 1 according to the first embodiment. This is the amount of “play” secured for stroke adjustment when the core mold 4 is lowered.

  In the state shown in FIG. 10C and FIG. 11C, the bottom surface 42a and the end surface 11c of the end surface pressing portion 42 face each other without a gap, while the convex portion 43 and the inner side surface 11b and the concave portion 34 and the outer surface 11a also have a gap. They are in touch. Further, the bottom surface 44a of the end surface forming portion 44 bites into the inner edge side of the inner side surface 11b to form a new end surface. Among these, since the end surface 11c shown in FIG. 11C is not pressed by the end surface pressing part 42, it does not necessarily form the same shape as FIG. 10C by the influence of the wood component escaping from the location pressed by the end surface pressing part 42. There is no (in FIG. 11C, the case where the end face 11c is located slightly above the end face 11c shown in FIG. 10C). In such a case, the unevenness of the end face 11c may be leveled by performing an appropriate end face treatment such as cutting after compression.

  10C and FIG. 11C are continued for a predetermined time (1 to several tens of minutes, more preferably about 5 to 10 minutes), and then the water vapor atmosphere is released to dry the wood 11, and the core mold 4 and The cavity mold 3 is separated and the compression is released.

  FIG. 12 is a diagram showing the configuration of the wood 11 after compression, and is a cross-sectional view showing the configuration of the wood viewed from the same cut surface as FIG. 10C. Hereinafter, the compressed wood 11 is referred to as “wood 11-2”. In the wood 11-2 shown in FIG. 12, in addition to the original end surface 11c, a portion pressed by the bottom surface 44a of the end surface forming portion 44 is formed as a new end surface 11d that circulates over the entire circumference. .

  Thereafter, processing such as cutting is performed along the end surface 11d so that the end surface 11d newly formed by compression becomes the final end surface. As a result, the edge portion of the wood 11-2 including the end surface 11c is scraped off, and the compressed wood product having a new end surface including the end surface 11d is obtained which has substantially the same shape as the compressed wood product 12 illustrated in FIGS. . As shown in FIGS. 10C and 11C, the end surface forming portion 44 does not completely bite in the thickness direction of the wood 11, but the effect of pressing against the newly formed end surface 11 d is achieved. In order to obtain it sufficiently, it is more preferable that the band width of the bottom surface 44a forming the band, that is, the width of the end surface 11d is 50% or more of the thickness of the compressed wood 11-2.

  In the second embodiment, among the distances between the core mold 4 and the cavity mold 3, the distance in the vicinity of the end face 11d newly formed by the end face forming portion 44 of the core mold 4 is the other part. Since it is smaller than the interval, the compression rate of that portion (ratio of the amount of change in thickness before and after compression with respect to the thickness before compression) becomes significantly larger than the compression rate of other portions. Therefore, according to the wood processing apparatus according to the second embodiment, the strength of the end face of the compressed wooden product can be improved. In the second embodiment as well, the thickness of the compressed wood is about 30 to 50% of the thickness of the wood before compression (the value in the vicinity of the end face is larger than the values in other portions). As described above).

  According to the second embodiment of the present invention described above, it protrudes from the side surface of the core body portion having a columnar shape, abuts on at least a part of the end surface of the wood, and in a direction substantially perpendicular to the thickness direction of the abutting end surface. A plurality of end surface pressing portions for applying a compressive force; and a shape protruding from any one of the surfaces of the core main body portion and the surfaces orthogonal to the side surfaces of the core main body portion from which the plurality of end surface pressing portions protrude; A convex portion (first surface pressing portion) that abuts against the surface of the wood and applies a compressive force, and an outer periphery of the surface of the core main body portion on the surface on which the first surface pressing portion protrudes. Formed in a closed band shape having a uniform width in a region between the first surface pressing portion and the end surface pressing portion abutting against the wood when the wood is processed. End surface forming part that forms an end surface different from the end surface , And a core body having a columnar shape and an opening end on one of the surfaces orthogonal to the height direction of the cavity main body, and the cross-sectional area of the opening cross section orthogonal to the height direction corresponds to the height. A mortar-shaped opening that gradually decreases from the opening end along the direction, and a guide portion in which a plurality of notches are formed on the slope of the mortar-shaped opening, and the cross-sectional area of the guide portion is the smallest Wood using a cavity mold having a shape recessed from the bottom in a direction opposite to the opening end, and having a recess (second surface pressing portion) that abuts against the surface of the wood and applies compressive force By configuring the processing apparatus, even when the shape change before and after compression of the wood is large, it is possible to form the wood without causing cracks.

  Further, according to the second embodiment, the end face pressing part in the core mold and the guide part in the cavity mold have a simple configuration, and they are formed of the same material as the core main body part and the cavity main body part, respectively. Therefore, it is possible to improve the durability of each mold and reduce the manufacturing cost.

  Furthermore, according to the second embodiment, the vicinity of the end face of the final shape is formed with a higher compression rate than other parts, so that the strength near the end face can be improved and the quality of the compressed wood product can be improved. Can do.

  So far, the first and second embodiments have been described as the best modes for carrying out the present invention, but the present invention should not be limited only by these two embodiments. That is, 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. Is possible.

  Compressed wood products processed by a wood processing apparatus having a core mold and a cavity mold according to the present invention include a digital camera, a mobile phone, a portable communication terminal such as a PHS or PDA, a portable audio apparatus, an IC recorder, It can be applied as exterior materials for portable televisions, portable radios, remote controls for various home appliances, digital video, and the like. Moreover, it is also possible to apply the compressed wood product processed by the wood processing apparatus according to the present invention to a spectacle case, tableware, or the like.

It is a perspective view which shows the structure of the principal part of the wood processing apparatus which concerns on Embodiment 1 of this invention. It is a perspective view which shows the structure before the process of the timber to be processed. It is CC sectional view taken on the line of FIG. 2 (the figure which reversed up and down). It is a figure which shows typically the shaping position when shape | molding the timber to be processed from a solid material. When compressing wood using the wood processing apparatus which concerns on Embodiment 1 of this invention, it is a figure which shows the state which contacted the core metal mold | die in which a part of end surface of the wood descended from upper direction. It is a figure which shows the state which the outer surface of the wood contacted the recessed part of the cavity metal mold | die when compressing wood using the wood processing apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows the state which the deformation | transformation of the timber was completed substantially when compressing timber using the timber processing apparatus which concerns on Embodiment 1 of this invention. It is the figure which looked at the same state as Drawing 5A in a section different from Drawing 5A. It is the figure which looked at the same state as Drawing 5B in a section different from Drawing 5B. It is the figure which looked at the same state as Drawing 5C in a section different from Drawing 5C. It is a perspective view which shows the structure of the compression wooden product formed using the wood processing apparatus which concerns on Embodiment 1 of this invention. It is the EE sectional view taken on the line of FIG. 7 (the figure which reversed up and down). It is a perspective view which shows the structure of the core metal mold | die which concerns on Embodiment 2 of this invention. When compressing a timber using the timber processing apparatus which concerns on Embodiment 2 of this invention, it is a figure which shows the state which contacted the core metal mold | die from which the part of the end surface of the timber descend | falled from upper direction. When compressing wood using the wood processing apparatus which concerns on Embodiment 2 of this invention, it is a figure which shows the state which the outer surface of the wood contacted the recessed part of the cavity metal mold | die. It is a figure which shows the state which the deformation | transformation of the timber was completed substantially when compressing timber using the timber processing apparatus which concerns on Embodiment 2 of this invention. It is the figure which looked at the same state as Drawing 10A in a section different from Drawing 10A. It is the figure which looked at the same state as Drawing 10B in the section different from Drawing 10B. It is the figure which looked at the same state as Drawing 10C in the section different from Drawing 10C. It is sectional drawing which shows the structure of the timber after compressing timber using the timber processing apparatus which concerns on Embodiment 2 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wood processing apparatus 2, 4 Core metal mold 3 Cavity metal mold 10 Solid material 11, 11-2 Wood 11a Outer side surface 11b Inner side surface 11c, 11d End surface 12 Compressed wood product 12a Main plate part 12b, 12c Side plate part 21, 41 Core main-body part 31 Cavity body part 22, 42 End surface pressing part 22a, 42a, 44a Bottom face 23, 43 Convex part (first surface pressing part)
32 Guide part 33 Notch 34 Recessed part (2nd surface press part)
44 End face forming part G Wood

Claims (8)

A core mold that applies a compressive force in contact with the surface of the wood when processing the wood,
A core body having a columnar shape;
A plurality of protrusions projecting from side surfaces of the columnar core main body, abut against at least a part of the end face of the wood when the wood is processed, and apply a compressive force in a direction substantially perpendicular to the thickness direction of the abutting end face End face pressing part of
A surface of the core main body portion that protrudes from any one of the surfaces orthogonal to the side surfaces of the core main body portion from which the plurality of end face pressing portions protrude, and the surface of the wood when processing the wood A first surface pressing portion that applies a compressive force in contact with
A core mold characterized by comprising:   On the surface of the core body portion on which the first surface pressing portion protrudes, a closed band shape having a uniform width in a region between the outer periphery of the surface and the first surface pressing portion. And further comprising an end surface forming portion that forms an end surface different from an end surface formed when the end surface pressing portion abuts against the wood when the wood is processed. Item 1. A core mold according to Item 1.   The core mold according to claim 2, wherein a width of the end surface forming portion having a band shape is 50% or more of a thickness of an end surface formed by compression.   The core mold according to any one of claims 1 to 3, wherein a film-like lubricating means is provided on a surface of the end face pressing portion.   The core mold according to any one of claims 2 to 4, wherein a film-like lubricating means is provided on the surface of the end face forming portion. A cavity mold that applies a compressive force in contact with the surface of the wood when processing the wood,
A cavity body having a columnar shape;
The columnar cavity body has an opening end on one of the surfaces orthogonal to the height direction of the cavity main body, and the cross-sectional area of the opening cross section orthogonal to the height direction extends from the opening end along the height direction. A mortar-shaped opening that gradually decreases, and a guide portion in which a plurality of notches are formed on the slope of the mortar-shaped opening,
A second surface that has a shape indented in a direction opposite to the opening end from the bottom surface having the smallest cross-sectional area of the guide portion, and applies a compressive force by contacting the surface of the wood when the wood is processed. A pressing part;
A cavity mold characterized by comprising:   7. A cavity mold according to claim 6, wherein a film-like lubricating means is provided on the surface of the guide portion. A core mold according to any one of claims 1 to 5,
Cavity mold according to claim 6 or 7,
With
When the core mold approaches the cavity mold, each of the plurality of end surface pressing portions is fitted into one of the plurality of notches formed in the guide portion. Wood processing equipment.

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