JP6843360B1 - Wood-like product manufacturing equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the texture of a wood-like product to be manufactured from being impaired even when the color of the base is changed in a wood-like material manufacturing apparatus. SOLUTION: A wood-like product manufacturing apparatus 100 has a control unit 150, a first measuring unit 110 for measuring a required amount of a first base material B1, a first masterbatch M1, and a first masterbatch M1 in different colors. The second measuring unit 120 that measures the required amount of the second master batch M2, the first base material B1 that the first measuring unit 110 measures, and the master batches M1 to M3 that the second measuring unit 120 measures. The control unit 150 includes an extrusion unit 140 for melting and extruding the melts B1, M1 to M3 from the opening 141e of the mold 141, and the control unit 150 includes the amount of the first base material B1 measured by the first measuring unit 110 and the amount of the first base material B1 measured by the first measuring unit 110. The amount of master batches M1 to M3 measured by the second measuring unit 120 is switched according to the base color of the wood-like product 200 to be produced. [Selection diagram] FIG. 5

Description

The present invention relates to a device for manufacturing a wood-like product.

Conventionally, products having a texture similar to that of natural wood (hereinafter referred to as wood-like products) have been manufactured by extrusion molding of resin.
In addition, various techniques have been proposed to make the texture of wood-like products closer to that of natural wood.
For example, Patent Document 1 describes a coating material obtained by extruding an extruded material containing wood powder and resin to form a molded product body, and mixing a surface layer material containing wood powder and resin and a pigment. Described is a method for manufacturing a long material, which comprises a molding step of covering the main body of a molded product and molding a long material having the same cross section, and changing the mixing ratio of the surface layer material and the pigment during the molding process.

Japanese Patent No. 5566943

In extrusion molding, the same manufacturing equipment may be used to manufacture a plurality of products having the same size and shape but different base colors.
However, the manufacturing apparatus described in Patent Document 1 only changes the mixing ratio of the surface layer material and the pigment with time at regular intervals regardless of the color of the base.
Therefore, depending on the color of the base, the texture of the wood material produced may be far from the natural wood.

The present invention has been made in view of the above problems, and the texture of the wood-like product to be manufactured is not impaired even when the color of the base is changed in the wood-like material manufacturing apparatus. The purpose is.

The invention according to claim 1 is, for example, as shown in FIGS. 1, 2, 4 and 5.
Control unit 150 and
Based on the control of the control unit 150, the first measuring unit 110 that measures the required amount of _{the first base material B 1 and}
Under the control of the control unit 150, the first master batch M _1, and the second metering unit from the first master batch M ₁ take the required amount weighed at least one of the second master batch M ₂ colors differ 120 and
_{The first base material B 1} measured by the first measuring unit 110 _{and the master batches M 1 to} M ₃ measured by the second measuring unit 120 are melted, and the melts B ₁ and M _{1 to} M are melted. ₃ is provided with an extrusion portion 140 for extruding 3 from the opening 141e of the mold 141.
The control unit 150 measures at least one _{of the amount of the first base material B 1} measured by the first measuring unit 110 and the amount of the master batches M _{1 to} M _{3 measured by the second measuring unit 120.} , The manufacturing apparatus 100 of the wood-like product 200, characterized in that the wood-like product to be produced is switched according to the base color of the wood-like product.

According to the invention of claim 1, _{at least one of the amount of the base material B 1 and} the amount of the master batches M _{1 to} M ₃ is changed according to the base color of the wood-like product to be manufactured. Will be done.
Therefore, even if the color of the base is changed, the texture of the manufactured wood-like product can be prevented from being impaired.

The invention according to claim 2
In the manufacturing apparatus 100 of the wood-like product 200 according to claim 1.
The control unit 150 is characterized in that the second measuring unit 120 measures the first master batch M ₁ and the second master batch M ₂ in this order.

According to the invention of claim 2, since the first masterbatch M ₁ and the second masterbatch M ₂ are cumulatively mixed, the manufacturing apparatus 100 can be miniaturized.
In addition, since the first masterbatch M ₁ and the second masterbatch M _{2 are measured separately, one of the master batches M 1 to} M ₃ may be added or omitted depending on the color of the wood-like product 200 to be manufactured. it can.

The invention according to claim 3 is, for example, as shown in FIG.
In the manufacturing apparatus 100 of the wood-like product 200 according to claim 1 or 2.
The control unit 150 is attached to the first measuring unit 110 and the second measuring unit 120.
The base material B ₁ and the master batches M _{1 to} M ₃ are repeatedly measured in a constant total amount, and then measured.
Further, each time the base material B ₁ and the master batches M _{1 to} M ₃ are measured, the blending ratio thereof is changed.

According to the third aspect of the invention, the color of the produced wood-like product changes continuously along the extrusion direction, and the texture of the wood-like product can be made closer to that of natural wood.

The invention according to claim 4 is, for example, as shown in FIG.
In the manufacturing apparatus 100 of the wood-like product 200 according to claim 3.
The control unit 150 can cause the first measuring unit 110 and the second measuring unit 120 to change the total amount of the _{base material B 1} and the master batches M _{1 to} M _{3 to be measured at one time.} It is characterized by that.

According to the invention of claim 4, the period of continuous change of color in the extrusion direction of the wood-like product can be adjusted.

The invention according to claim 5, for example, as shown in FIGS.
In the manufacturing apparatus 100 of the wood-like product 200 according to any one of claims 1 to 4.
The mold 141 has an inner flow path 141f and an outer flow path 141g formed so as to surround the inner flow path 141f.
The extrusion unit 140
A second base member B ₂ melted to melt the second base member B inner extrusion 142 pushes ₂ to the inside flow passage 141 f,
It is characterized by having an outer extrusion portion 143 that extrudes the melts B ₁ , M _{1 to} M _{3 into the outer flow path 141 g.}

According to the invention of claim 5, the central portion of the wood-like product _{can be molded only with the second base material B 2} , and the amount of pigment used can be reduced.

The invention according to claim 6 is, for example, as shown in FIG.
In the manufacturing apparatus 100 of the wood-like product 200 according to any one of claims 1 to 5.
The first measuring unit 110 includes a first container 111 for storing _{the first base material B 1.}
Said second metering unit 120 includes the first master batch M ₁ ~M ₃ second container 121 previously stores the, and the third container 122 to keep storing the second master batch M ₁ ~M ₃ ,
A supply unit 100c for supplying the _{base material B 1} to the first container 111 _{and supplying the master batches M 1 to} M ₃ to at least one of the second container 121 and the third container 122 is further provided. It is characterized by.

According to the invention of claim 6, _{when a large amount of base material B 1} or master batches M _{1 to} M ₃ is required, or where the first to third containers 111, 121, 122 are hard to reach (a place where the first to third containers 111, 121, 122 are hard to reach ( For example, even when it is in a high place), the base material B ₁ and the master batches M _{1 to} M ₃ can be easily supplied to the first to third containers 111, 121, 122.

According to the present invention, even when the color of the base is changed, the texture of the produced wood-like product can be prevented from being impaired.

It is a front view which shows the manufacturing apparatus of the wood-like product which concerns on embodiment of this invention. It is a front view and a plan view which show a part of the manufacturing apparatus of FIG. It is a front view which shows a part (the mold of the extrusion part) of the manufacturing apparatus of FIG. It is a block diagram which shows a part (control panel) of the manufacturing apparatus of FIG. It is a table which shows the composition of the wood-like product which concerns on the same embodiment. It is a figure which shows a part (display screen of a control panel) of the manufacturing apparatus of FIG. It is a table which shows the composition of the 1st base material (surface layer base material) which concerns on the same embodiment. It is a table which shows the specification of the masterbatch which concerns on the same embodiment. It is a perspective view which shows the wood-like product which concerns on the same embodiment. It is sectional drawing which shows the wood-like product which concerns on the same embodiment. It is a table which shows the color measurement value and the judgment result of the wood-like product which concerns on Example of this invention. It is a table which shows the color measurement value and the judgment result of the wood-like product which concerns on Example of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
However, although various technically preferable limitations for carrying out the present invention are attached to the embodiments described below, the technical scope of the present invention is not limited to the following embodiments and illustrated examples. Absent.

<1. Wood-like product manufacturing equipment>
First, the wood-like product manufacturing apparatus 100 will be described.
FIG. 1 is a front view showing a manufacturing apparatus 100 according to the present embodiment, FIG. 2 is a front view and a plan view showing a part of the manufacturing apparatus 100, FIG. 3 is a front view showing a mold of an extrusion portion, and FIG. FIG. 5 is a block diagram showing a part of the apparatus 100, FIG. 5 is a table showing the composition of the wood-like product according to the same embodiment, and FIG. 6 is a diagram showing a part of the manufacturing apparatus 100.

As shown in FIG. 1, for example, the manufacturing apparatus 100 includes a main body 100a and a control panel 100b.
Further, the manufacturing apparatus 100 according to the present embodiment further includes a supply unit 100c.

[1-1. Body]
The main body 100a includes a first measuring unit 110, a second measuring unit 120, and an extrusion unit 140.
Further, the main body 100a according to the present embodiment further includes a mixing unit 130.

(1-1-1. First measuring section)
The first measuring unit 110 includes a first container 111 and a first measuring instrument 112.
The first container 111 is for storing _{the surface layer base material (first base material) B 1} constituting the surface layer portion 220 of the wood-like product 200.
The first container 111 according to the present embodiment _{is a hopper capable of receiving the contents (surface layer base material B 1} ) from above and pouring the contents into the lower first measuring instrument 112.
The first measuring unit 110 measures the required amount of the _{surface layer base material B 1} based on the control of the control panel 100b (control unit 150 described later).
The first measuring instrument 112 according to the present embodiment measures the amount of drop while dropping the contents downward by rotating a screw provided under the first container 111 above, and the amount of drop is a required amount. It is configured to stop the screw when it reaches.

(1-1-2. Second measuring section)
The second measuring unit 120 includes a second container 121, a third container 122, and a second measuring instrument 123.
Further, as shown in FIG. 2, the second measuring unit 120 according to the present embodiment further includes a fourth container 124.

The second container 121 is for storing _{the first master batch M 1.} The second container 121 according to the present embodiment is configured in the same manner as the first container 111.

The third container 122 is for storing _{the second masterbatch M 2.} The third container 122 according to the present embodiment is configured in the same manner as the first container 111.
The color of the second masterbatch M ₂ is different from that of the first masterbatch M _1.

The fourth container 124, previously stored third masterbatch M _3. The fourth container 124 according to the present embodiment is configured in the same manner as the first container 111.
The color of the third master batch M ₃ is different from that of the first master batch M ₁ and the second master batch M _2.

_{The second measuring instrument 123 according to the present embodiment has each content (master batch M 1 to} M ₃ ) by rotating screws provided under the upper second to fourth containers 121, 122, 124, respectively. ) Is dropped downward and the amount of the drop is measured, and when the amount of the drop reaches the required amount, the screw is stopped.

The second measuring unit 120 according to the present embodiment configured in this way is among the first master batch M ₁ , the second master batch M ₂ and the third master batch M ₃ based on the control of the control panel 100b. It is configured so that at least one of them can be measured.

(1-1-3. Mixing part)
The mixing unit 130 mixes the surface layer base material B _{1 measured by the first measuring unit and the master batches M 1 to} M ₃ measured by the second measuring unit 120, and sends them to the extrusion unit 140. ing.

(1-1-4. Extruded part)
The extruded portion 140 has a mold 141, an inner extruded portion 142, and an outer extruded portion 143.

The mold 141 has, for example, a flow path 141a and an injection hole 141b, as shown in FIG.
Further, the mold 141 according to the present embodiment has a mandrel 141c.
The flow path 141a penetrates in one direction (direction orthogonal to the paper surface of FIG. 3).
Further, the inlet opening 141d on the inlet side (the inner extrusion portion 142 side described later) of the flow path 141a is formed to be one size smaller than the outlet opening 141e (or the cross section of the intermediate portion) on the outlet side.
Hereinafter, the inner part of the boundary in the flow path 141a is the inner flow path 141f, and the outer part of the boundary is the outer flow path, with a plane extending parallel to the inner wall surface of the flow path 141a through the contour of the inlet opening 141d in the flow path 141a as a boundary. It is called 141 g.
The injection hole 141b is connected to the outer extrusion portion 143.
The mandrel 141c is arranged in the inner flow path 141f so as to have a boundary and a distance between the inner flow path 141f and the outer flow path 141g.

The inner extrusion unit 142 includes a first cylinder 142a, a supply unit 142b, a first heater (not shown), a first screw, and a first motor.
_{One end of the first cylinder 142a is connected to the supply portion 142b of the central base material (second base material) B 2} constituting the base 210 of the wood-like product 200, and the other end is connected to the inner flow path 141f of the mold 141. Has been done.
The first heater heats the inside of the first cylinder 142a under the control of the inner extrusion portion 142.
The first screw is arranged in the first cylinder 142a.
The first motor rotates the first screw under the control of the inner extrusion portion 142.
The inner extrusion 142 having such a structure is adapted to push the central base member B ₂ melt central base to melt the material (molten second base material) B ₂ into the inner flow passage 141f of the mold 141 ..

The outer extrusion portion 143 includes a second cylinder 143a, a second heater (not shown), a second screw, and a second motor.
The second cylinder 143a is connected to the mixing portion 130, and the other end is connected to the outer flow path 141g of the mold.
The second heater heats the inside of the second cylinder 143a under the control of the outer extrusion portion 143.
The second screw is arranged in the second cylinder 143a.
The second motor rotates the second screw under the control of the outer extrusion portion 143.
The outer extrusion portion 143 configured in this way melts _{the surface layer base material B 1 measured by the first measuring unit 110 and the master batches M 1 to} M ₃ measured by the second measuring unit 120, and melts the surface layer base material B 1 and the master batches M 1 to M 3 measured by the second measuring unit 120. Objects B ₁ , M _{1 to} M ₃ are pushed out to the outer flow path 141 g of the mold 141 through the injection hole 141 b.

Extrusion unit constructed as described above 140, together with the extruding molten center base member B ₂ which the central base member B ₂ is melted from the outlet of the inner passage 141 f (center of the exit opening 141e), melt B ₁ , M _{1 to} M ₃ are extruded from the outlet (outlet opening 141e peripheral portion) of the outer flow path 141g so as to cover the _{molten surface layer base material B 1.}
By doing so, the central portion of the wood-like product _{can be molded only with the central base material B 2} , and the amount of pigment used can be reduced.

[1-2. control panel〕
As shown in FIG. 4, for example, the control panel 100b includes a control unit 150, a reading unit 160, and an interface unit 170.

(1-2-1. Control unit)
The control unit 150 includes a CPU (Central Processing Unit), a RAM (Random Access Memory), a non-volatile memory, a communication module, and the like (not shown).
The CPU reads various programs (including an execution program for character control processing described later) stored in the non-volatile memory, expands them in the RAM, executes various processes according to the expanded programs, and performs various processes according to the expanded programs. The operation is centrally controlled.
The communication module can transmit and receive various signals and various data to and from the main body 100a and the supply unit 100c connected via a cable.
The storage device stores a program for the control unit 150 to execute various processes.

(1-2-2. Reader)
The reading unit 160 according to this embodiment is loaded with media 161 (for example, an SD card or the like).
Then, the reading unit 160 reads the contents stored in the media 161.
The media 161 according to the present embodiment stores compounding information regarding compounding of materials for wood-like products, as shown in FIG. 5, for example.
The compounding information according to the present embodiment includes the base color, the deformation pattern included in the same base color, _{the compounding ratio of the surface layer base material B 1} and the master batches M _{1 to} M ₃ for each deformation pattern, and the master batches M _{1 to} M _3. It has the shape of.
The base colors according to the present embodiment are ebony, reddish, and thick white.
Further, in the deformation pattern, the color of the main material used is the same, and the colors and blending ratios of _{the master batches M 1 to} M _{3 used are changed.}
Further, the shapes of the master batches M _{1 to} M _{3 according to} the present embodiment are pellets and granules.
The composition shown in FIG. 5 is merely an example, and can be appropriately changed according to the color and texture of the wood-like product 200 to be manufactured.

In this way, by storing the compounding information in the media 161 and reading it by the reading unit 160, the compounding information is added or rewritten using the control panel 100b or another device (PC or the like). It is also possible.
The control panel 100b may not include the reading unit 160 but may include a storage unit (for example, a hard disk or the like) for storing compounding information.

(1-2-3. Interface section)
The interface unit 170 includes a display unit 171 and an operation unit 172.
The display unit 171 is composed of a monitor such as an LCD (Liquid Crystal Display) or a CRT (Cathode Ray Tube), and displays various images, various information, and the like according to an instruction of a display signal input from the control unit 150. ing.

The operation unit 172 is configured to be operable by the user with various buttons provided on the housing of the control panel 100b, a touch panel laminated on the surface of the display unit 171 and the like.
Then, the operation unit 172 outputs a control signal based on the operation performed by the operator to the control unit 150.

(1-2-4. Others)
In the manufacturing apparatus 100 according to the present embodiment, the control panel 100b is independent of the main body 100a, but at least one of the components of the control panel 100b is integrated with the main body 100a and the supply unit 100c. It may be.

[1-3. Supply unit]
The supply unit 100c includes a supply unit main body 180 and a plurality of pipes 190.
The supply unit main body 180 includes a powder removing tank 181, a blower 182, and a switching valve 183.

The blower 182 is capable of sucking any of the surface base material B ₁ and the first to third master batches M _{1 to} M ₃ to be supplied from now on from the powder removing tank 181.
Further, the blower 182 is designed to blow the material by the force of the wind.
The switching valve 183 can switch the pipe 190 that feeds the wind and the material from the blower 182.
One end of each of the plurality of pipes 190 is connected to each switching valve 183, and the other end is connected to the first to fourth containers 111, 121, 122, 124, respectively.

The supply unit 100c configured in this way supplies the surface layer base material B _{1 to the first container 111, and the master batch M 1} to at least one of the second container 121, the third container 122, and the fourth container 124. ~ M ₃ is supplied.
By doing so, when a _{large amount of surface base material B 1} or master batches M _{1 to} M ₃ is required, or where the first to fourth containers 111, 121, 122, 124 are hard to reach (the present embodiment). _{The surface layer base material B 1} and the master batches M _{1 to} M ₃ can be easily supplied to the first to fourth containers 111, 121, 122, 124 even when the surface layer base material B 1 and the master batches M 1 to M 3 are located at a high place.

[1-4. motion〕
The control unit 150 of the manufacturing apparatus 100 configured in this way has, for example, a function of displaying the setting screen and the operating screen as shown in FIG. 6 on the display unit 171.
On the screen, the selected base color (grade), the amount of the surface layer base material B ₁ and the amount of the masterbatch to be measured, etc. are displayed.
Further, the control unit 150 has a function of setting the base color of the wood-like product to be manufactured based on the operation performed by the operation unit 172.

Further, the control unit 150 will create at least one of the amount of the _{surface layer base material B 1} measured by the first measuring unit 110 and the amount of the master batches M _{1 to} M _{3 measured by the second measuring unit 120.} It has a function to switch according to the base color of the wood-like product.
The control unit 150 according to the present embodiment selects and sets a formulation corresponding to the selected base color and deformation pattern from the list of formulations shown in FIG.
Further, the control unit 150 according to the present embodiment causes the second measuring unit 120 to measure the first master batch M ₁ , the second master batch M ₂ , and the third master batch M ₃ in this order. ing.

By doing so, the first master batch M ₁ and the second master batch M ₂ are cumulatively mixed, so that the manufacturing apparatus 100 can be miniaturized.
In addition, since the first masterbatch M ₁ and the second masterbatch M _{2 are measured separately, one of the master batches M 1 to} M ₃ may be added or omitted depending on the color of the wood-like product 200 to be manufactured. it can.

Further, the control unit 150 according to the present embodiment has the first measuring unit 110 and the second measuring unit 120.
The surface layer base material B ₁ and the master batches M _{1 to} M ₃ are repeatedly measured in a fixed total amount.
Further, the control unit 150 according to the present embodiment changes the blending ratio _{of the surface layer base material B 1} and the master batches M _{1 to} M _{3 each time the first measuring unit 110 and the second measuring unit 120 are measured.} It is possible.
By doing so, the color changes continuously along the extrusion direction of the wood-like product to be produced, and the texture of the wood-like product can be made closer to that of natural wood.

Further, the control unit 150 according to the present embodiment causes the first measuring unit 110 and the second measuring unit 120 to change the total amount of the _{surface layer base material B 1} and the master batches M _{1 to} M _{3 to be measured at one time.} Is possible.
By doing so, it is possible to adjust the period of continuous change of color in the extrusion direction of the wood-like product.

[1-5. effect〕
According to the manufacturing apparatus of the wood-like product 200 according to the present embodiment described above _{, at least one of the amount of the surface layer base material B 1 and} the amount of the master batches M _{1 to} M ₃ is the wood-like product to be manufactured. It changes according to the base color of the product.
Therefore, even if the base color is changed, the texture of the manufactured wood-like product can be prevented from being impaired.

<2. Manufacturing method of wood-like products ＞
Next, a method for manufacturing the wood-like product 200 will be described by taking the case where the manufacturing apparatus 100 is used as an example.
FIG. 7 is a table showing the composition of the surface layer base material B _{1 according to} the present embodiment, and FIG. 8 is a table showing the specifications of the master batch according to the present embodiment.

The method for producing the wood-like product 200 includes a weighing step and an extrusion step.
In addition, the method for producing the wood-like product 200 according to the present embodiment further includes a polishing step.

[2-1. Weighing process]
In the first weighing step, the surface base material B ₁ and the master batches M _{1 to} M ₃ constituting the wood-like product 200 are measured.
In accordance with the present embodiment, as the surface layer base material B _1, high density polyethylene (High Density Polyethylene: HDPE) and, using a plurality a first pigment, was mixed pellets.

As shown in FIG. 7, the first pigment contained in one pellet is one of brown, ocher, coffee, light gray, and light ocher.
The surface layer base material B ₁ may be composed of only pellets containing the same first pigment, or may be a mixture of a plurality of types of pellets having different first pigments.
For example, if you want the base color of a wood-like product to be ebony, use only brown pellets, or a mixture of brown pellets and coffee-colored pellets as the surface base material B ₁ , and if you want to make it gray. Only light gray pellets are used as the _{surface base material B 1.}
The composition shown in FIG. 7 is merely an example, and can be appropriately changed according to the color and texture of the wood-like product 200 to be manufactured.

Further, in the method for producing the wood-like product 200, the _{pellets contained in the surface layer base material B 1} are further mixed with wood powder.
By doing so, it is possible to reduce the amount of resin (petroleum as a raw material) used and the manufacturing cost as compared with the case where only resin and pigment are used.
Further, since the wood flour can be easily produced from the waste material or the like, the waste material can be reused.
The waste material will be incinerated as it is, but it is possible to prevent carbon dioxide emissions by reusing it.
Instead of mixing wood powder, powders of other cellulosic materials (for example, bagasse, rice straw, etc.) may be mixed, or wood powder and powders of other cellulosic materials may be mixed together. May be good.

Further, in the production method according to the present embodiment, a plurality of pellets or granules obtained by mixing polystyrene (PS) or acrylonitrile styrene (AS) with a second pigment are used as _{master batches M 1 to} M _3.
The second pigment is different from the first pigment. The second pigment contained in one pellet or grain is either yellow, white or black.
Further, in the manufacturing method according to the present embodiment, three types of _{master batches M 1 to} M ₃ are used: the first master batch M ₁ , the second master batch M _2, and the third master batch M _3.
The first masterbatch M _{1 according to} the present embodiment contains a yellow pigment.
The color of the second masterbatch M ₂ is different from that of the first masterbatch M _1. The second masterbatch M _{2 according to} the present embodiment contains a white pigment.
The color of the third master batch M ₃ is different from that of the first master batch M ₁ and the second master batch M _2. Third masterbatch M ₃ according to the present embodiment is a one that contains a black pigment.

The measurement of the surface layer base material B ₁ and the master batches M _{1 to} M ₃ is repeated while changing the mixing ratio of these.
By doing so, the color changes continuously along the extrusion direction of the wood-like product, and the texture of the wood-like product can be made closer to that of natural wood.

[2-2. Extrusion process]
After measuring the material, the process moves to the extrusion process.
In the extrusion step, the measured surface layer base material B ₁ and the master batches M _{1 to} M ₃ are melted, and the melted melts B ₁ , M _{1 to} M ₃ are extruded from the outlet opening 141e of the mold 141.
The temperature may be the same as in the case of ordinary extrusion molding using high-density polyethylene as the surface layer base material B _1.
In the production method according to the present embodiment, at this time, the portion of the melts B ₁ , M _{1 to} M ₃ having a relatively high concentration of the surface layer base material B _{1 and} the concentration of the master batch M _{1 to} M ₃ are relative to each other. _{The melts B 1} and M _{1 to} M ₃ are extruded _{before the surface base material B 1} and the master batches M _{1 to} M ₃ are completely mixed, that is, with the high portion remaining.

In accordance with the present embodiment, in the extrusion step, extruding the molten center base member B ₂ which the central base member B ₂ is melted from the center of the outlet opening 141e (the outlet of the inner passage 141f of the mold 141) At the same time, the melts B ₁ , M _{1 to} M ₃ are extruded from the peripheral edge of the outlet opening 141e (the outlet of the outer flow path 141 g of the mold 141) so as to cover the _{melt center base material B 2.}
In the method for producing the wood-like product 200 according to the present embodiment, the same _{pellets contained in the central base material B 2} as those used in the surface base material B _{1 are used.}
By doing so, the central portion of the wood-like product _{can be molded only with the central base material B 2} , and the amount of pigment used can be reduced.
Polystyrene and acrylonitrile styrene are slightly less likely to soften than high-density polyethylene at the same temperature, so it is relatively easy to create a state in which they are not completely mixed.

[2-3. Polishing process]
After extruding the melts B ₁ , M _{1 to} M ₃ , the process moves to the polishing process.
In the polishing step, the surface layer portion 220A of the extruded molded product is scraped off.
_{When the melts B 1} and M _{1 to} M ₃ are extruded while the portion where the concentration of the surface base material B ₁ is relatively high and the portion where the concentration of the master batches M _{1 to} M ₃ are relatively high remains. The color of the pigment appears strongly on the surface of the molded product, but by doing so, the portion of the molded product in which the color of the pigment is appropriate can be made the surface of the wood-like product.
In this way, the wood-like product 200 is manufactured.

[2-4. effect〕
In the method for producing the wood-like product 200 according to the present embodiment described above, the surface layer base material B ₁ (high-density polyethylene and the first pigment are mixed in the _{melts B 1} , M _{1 to} M _3). and the concentration is relatively high portion of things), with the concentration of the master batch M ₁ ~M ₃ (those obtained by mixing pigment into polystyrene or acrylonitrile styrene) has remained a relatively high portion, the melt Extrude B ₁ , M _{1 to M 3} .
Therefore, the manufactured wood-like product 200 _{contains a plurality of first regions that contain a relatively large amount of the surface layer base material B 1} and extend in the longitudinal direction, and a relatively large amount of master batches M _{1 to} M ₃ in the longitudinal direction. A plurality of second regions extending in the direction of the second region are mixed so as to be arranged irregularly in the lateral direction.
Then, the irregularly arranged first region and second region look like wood grain, and it is possible to feel a texture closer to natural wood than before.
That is, according to the method for producing the wood-like product 200 according to the present embodiment, the texture of the wood-like product 200 can be made closer to that of natural wood than before.

<3. Wood-like products>
Next, a wood-like product manufactured by the above manufacturing method (using the manufacturing apparatus 100) will be described.
9 is a perspective view showing the wood-like product 200 according to the present embodiment, FIG. 10 is a cross-sectional view showing the wood-like product 200 according to the present embodiment, and FIGS. 11 and 12 are color measurements of the wood-like product according to the present embodiment. It is a table which shows a value and a judgment result.

[3-1. Constitution〕
As shown in FIG. 9, the wood-like product 200 is elongated in one direction (extrusion direction from the manufacturing apparatus, vertical direction in FIG. 9).

The wood-like product 200 according to the present embodiment includes, for example, a base 210 and a surface layer 220, as shown in FIG.
The base 210 is formed of the central base material B ₂ in a shape slightly smaller than that of the wood-like product 200.
Since the central base material B ₂ does not contain a pigment, the wood-like product 200 can be made at a low cost with a small amount of the pigment used.
The base 210 according to this embodiment has a hollow inside.
The surface layer 220 covers the base 210.

Further, in the wood-like product 200, as shown in FIG. 9, a plurality of first regions 221 extending in the longitudinal direction and a plurality of second regions 222 extending in the longitudinal direction are arranged irregularly in the lateral direction. It is mixed in.
The first region 221 and the second region 222 according to the present embodiment are included in the surface layer portion 220.

The first region 221 contains a relatively large amount (more than the second region 222) of high density polyethylene (HDPE) and the first pigment. That is, the concentration of the surface layer base material B ₁ is relatively high.

The second region contains relatively more polystyrene (PS) or acrylonitrile styrene (AS) and the second pigment (than the first region 221). That is, the concentrations of the master batches M _{1 to} M ₃ are relatively high.
As mentioned above, the second pigment is different in color from the first pigment. Therefore, the color of the second region is different from that of the first region.

In the wood-like product 200 according to the present embodiment, the standard deviation of the color extracted from a plurality of regions on the surface of the wood-like product 200 is in the range of 0.3 to 0.9.
The standard deviation of the color is more preferably in the range of 0.3 to 0.6.
That is, the variation in the pattern visible on the wood grain is adjusted, and the texture closer to that of natural wood can be felt. Therefore, the wood-like product 200 according to the present embodiment can be used in a situation where the use of natural wood has been conventionally required.

Further, in the wood-like product 200 according to the present embodiment, the color is continuously changed along the longitudinal direction.
Therefore, the change in color along the longitudinal direction makes it possible to feel a texture closer to that of natural wood. As a result, the wood-like product 200 can be used in situations where the use of natural wood has been conventionally required.

Further, in the wood-like product 200 according to the present embodiment, wood powder is mixed in at least the first region 221.
In the wood-like product 200 according to the present embodiment, wood powder is also mixed in the base 210.
Generally, the density of wood is lower than that of resin. Therefore, in the wood-like product 200 according to the present embodiment, the amount of the same volume of resin (petroleum as a raw material) used is reduced by the amount of wood powder added, which is environmentally friendly and low cost. It becomes a thing.

[3-2. Example〕
First, samples A to H of eight kinds of wood-like products 200 were prepared.
Samples A to D had an ebony base color, and samples E to H had a red base color.
Then, using a handy type spectral color / color difference meter NR-11B (manufactured by Nippon Denshoku Industries Co., Ltd.), the color difference and in-plane variation of each of the samples A to D were measured.
Ten targets were extracted from the width of 30 cm along the direction orthogonal to the extrusion direction, and measured under the following measurement conditions.
-Light source: International Commission on Illumination (CIE) standard light source D65 light source-Viewing angle: 2 °
・ Target diameter: 10 mm
Then, the standard deviation (variation of color difference) of the obtained plurality of data as shown in FIGS. 11 and 12 was calculated.

On the other hand, the surfaces of each of the samples A to H were visually observed, and the variation was determined in the following three stages.
・ Large variation: Too coarse ・ Medium variation: Close to natural wood ・ Small variation: Uniform (small difference from conventional)
As a result, the standard deviation of the sample judged to be in variation was in the range of 0.3 to 0.6.

[3-3. effect〕
In the wood-like product 200 according to the present embodiment described above, the irregularly arranged first region and the second region look like wood grain, and it is possible to feel a texture closer to that of natural wood than before.
Therefore, the wood-like product 200 according to the present embodiment can be used as a substitute for wood in more various situations.

100 Wood-like product manufacturing equipment 100a Main body 110 First measuring part 111 First container 112 First measuring instrument 120 Second measuring part 121 Second container 122 Third container 123 Second measuring instrument 124 Fourth container 130 Mixing part 140 Extrusion Part 141 Mold 141a Flow path
141d entrance opening
141e Exit opening
141f inner flow path
141g Outer flow path 141b Injection hole 141c Mandrel 142 Inner extrusion 142a First cylinder 142b Supply 143 Outer extrusion 143a Second cylinder 100b Control panel 150 Control 160 Reading 161 Media 170 Interface 171 Display 172 Operation 100c Part 180 Supply part Main body 181 Dust removal tank 182 Blower 183 Switching valve 190 Pipe 200 Wood-like product 210 _{Base 220 Surface layer 220A Surface layer 221 First area 222 Second area B 1} Surface layer base material (first base material)
B ₂ center base material (second base material)
M _{1 to} M ₃ masterbatch

Claims (6)

Control unit and
Based on the control of the control unit, the first measuring unit that measures the required amount of the first base material and
Based on the control of the control unit, a first master batch and a second measuring unit that measures at least one of a second master batch having a color different from that of the first master batch,
The first base material measured by the first measuring unit and the extruded portion measuring the master batch measured by the second measuring unit and extruding the melt from the opening of the mold are provided.
The control unit is the base of the wood-like product for which the first measuring unit measures at least one of the amount of the first base material and the second measuring unit measures the amount of the masterbatch. A wood-like product manufacturing device characterized by switching according to the color to be used. In the wood-like product manufacturing apparatus according to claim 1,
The control unit is a wood-like product manufacturing apparatus, characterized in that the second measuring unit measures the first masterbatch and the second masterbatch in this order. In the wood-like product manufacturing apparatus according to claim 1 or 2.
The control unit is attached to the first measuring unit and the second measuring unit.
The first base material and the masterbatch are repeatedly measured in a fixed total amount, and then measured.
Further, a wood-like product manufacturing apparatus characterized in that the blending ratio of the first base material and the masterbatch is changed each time they are measured. In the wood-like product manufacturing apparatus according to claim 3,
The control unit is characterized in that the first measuring unit and the second measuring unit can change the total amount of the first base material and the masterbatch to be measured at one time. Manufacturing equipment. In the wood-like product manufacturing apparatus according to any one of claims 1 to 4.
The mold has an inner flow path and an outer flow path formed so as to surround the inner flow path.
The extruded part
An inner extrusion section that extrudes the molten second base material, which is obtained by melting the second base material, into the inner flow path,
An apparatus for producing a wood-like product, which comprises an outer extrusion portion for extruding the melt into the outer flow path. In the wood-like product manufacturing apparatus according to any one of claims 1 to 5.
The first measuring unit includes a first container for storing the first base material.
The second measuring unit includes a second container for storing the first masterbatch and a third container for storing the second masterbatch.
Manufacture of a wood-like product, which further comprises a supply unit for supplying the first base material to the first container and supplying a master batch to at least one of the second container and the third container. apparatus.