JP2001246606A - Wood molding and its manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wood molding of light weight and high strength. SOLUTION: As a bonding agent for a wood material W a cotton lump stated thermoplastic resin cotton lump 1 which is easy to be interwined with the wood material W and contains much air inside is mixed in the wood material W. Such the wood molded material is manufactured by heating and pressing a mixture mat of the wood material W and the cotton lump 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lightweight wooden molded product and a method for producing the wooden molded product.

[0002]

2. Description of the Related Art Conventionally, it has been proposed to obtain a woody compact by hot pressing a mixture of a woody material such as wood flour and a thermoplastic resin chip. Such a wooden molded article is useful as a building board or furniture material.

[0003]

Since the above-mentioned woody molded article uses thermoplastic resin chips, it is difficult to uniformly mix it with woody material, and it is easy to separate after mixing. Since it is difficult to fill the space between the materials, it is difficult to obtain a wooden molded body having uniform physical properties. In addition, in order to maintain the strong physical properties, it is necessary to take an operation of increasing the density, and heat such as plywood and OBS is required. There is a problem that it is difficult to obtain a lightweight wooden molded product that can be replaced with an existing structural material having excellent strength characteristics using a curable resin.

[0004]

According to the present invention, as a means for solving the above-mentioned conventional problems, there is provided a wooden molded product obtained by heating and molding a raw material mixture obtained by mixing a wooden material W and a cotton-lumen thermoplastic resin (1). To provide. There are, for example, the following four methods for producing the woody molded body of the present invention. First, a raw material mixture containing a wood material W and a cotton-lumen thermoplastic resin (1) is sprayed on a template moving on a roll conveyor to form a mat M, and the mat M is roll-pressed. After shaping, it is heated to a temperature equal to or higher than the softening point of the cotton-lumen thermoplastic resin (1) by passing through a hot roll press and molded, and the obtained molding mat is cooled by passing through a cold roll press or A method for producing a wooden molded article cooled by a cold press, the second is a wooden material W and a cotton-lumpy thermoplastic resin
(1) The raw material mixture containing (1) is directly sprayed on a roll conveyor to form a mat M, the mat M is shaped by a roll press, and then passed through a hot roll press to form the cotton-lumen thermoplastic resin (1). ) Is heated to a temperature equal to or higher than the softening point and molded, and the obtained molding mat is cooled by passing through a cold roll press or cooled by a cold press. A raw material mixture containing W and the lump thermoplastic resin (1) is sprayed on a template to form a mat M, and the mat M is heated at a temperature equal to or higher than the softening point of the lump thermoplastic resin (1). Hot press to mold,
A method for producing a wooden molded article, wherein the obtained molding mat is cooled by passing through a cold roll press or cooled by a cold press, and four methods are a wooden material W and a cotton-like thermoplastic resin.
The raw material mixture containing (1) is sprayed on a template to form a mat M, and the mat M is pressed to a temperature higher than the softening point of the cotton-lumen thermoplastic resin (1). This is a method for producing a wooden molded body in which the molded mat is cooled while being kept in a pressed state, and then cooled and released from the pressed state.

[0005]

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described in detail below. [Wood material] Examples of the wood material W used in the present invention include wood chips, strands, wood flour, wood wool, wood fiber bundles, wood pulp and the like. The woody material W may be obtained from, for example, scraps and waste materials generated when constructing or dismantling a wooden building. Particularly, a wood piece having a width of 1 to 5 mm, a length of 5 to 15 mm, and a thickness of 0.5 to 2 mm is desirable. In addition, when water is present in the wood piece, water vapor is generated from the wood piece upon heating, and a steam film is formed between the wood piece and the thermoplastic resin, and the adhesion between the wood piece and the thermoplastic resin is not good, so the wood piece is usually formed into pieces. The wood chips are then dried with a dryer to a moisture content of less than 5%.

[Cotton-like thermoplastic resin] Examples of the cotton-like thermoplastic resin used in the present invention include polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-propylene terpolymer, ethylene-vinyl acetate copolymer, and the like. Polyvinyl chloride, polyvinylidene chloride, polystyrene, polyvinyl acetate, fluororesin, thermoplastic acrylic resin, thermoplastic polyester, thermoplastic polyamide, acrylonitrile-butadiene copolymer, styrene-butadiene copolymer, acrylonitrile-butadiene-styrene copolymer It is a cotton lump of a thermoplastic resin such as a polymer. Such a cotton-lumen thermoplastic resin is, for example, spun, knitted or woven fibers of the thermoplastic resin,
Alternatively, it is a lump of fiber waste generated when the fiber is used to form a nonwoven fabric, or when a scrap such as a nonwoven fabric or a knitted woven fabric of the above fiber is defibrated into a recycled fiber. Such fiber waste is collected, for example, by a dust remover from a work place where the fiber is handled, removed by a carding machine during felt production, or removed as a contaminant during melt spinning.

Further, in the present invention, in addition to the above-mentioned fiber waste, a thermoplastic resin, in particular, a thermoplastic resin, which is obtained by melting a scrap of a thermoplastic resin and jetting it out of a nozzle by melt spinning or grinding a pulverized thermoplastic resin product by a refiner. The fine fibers may be entangled as they are or by an entanglement machine to produce a cotton lump. The cotton ingot may be a mixture of two or more types of fibers, or when melt-spinning a thermoplastic resin, two or more types of thermoplastic resins may be mixed and melted.

If a thermoplastic resin is used as a binder for the woody material W in the form of cotton mass as in the present invention, a mixture of two or more types can be used, so that the labor for sorting can be omitted. Further, the waste wood-formed product of the present invention is cut, crushed, or defibrated into a wood material W, which can be recycled again as a raw material of the wood-formed product or a wood cement board. In the recycling of such a wooden molded article, deterioration factors such as heat are not exerted, the recyclability is very high, and the recyclability of the thermoplastic resin is greatly improved indirectly. Moreover, such a wooden molded body is a building board,
Since it is used in large quantities for furniture materials, concrete forms, etc., recycled thermoplastic resin can also be consumed in large quantities.

[Third component] In addition to the above-mentioned woody material W and the cotton-lumen thermoplastic resin, the woody molded article of the present invention contains, for example, a water repellent, a waterproofing agent, an antioxidant, a coloring material and the like. In particular, when two or more kinds of thermoplastic resins are mixed and melt-spun, a compatibilizer may be added.

[Production of Woody Molded Article] In order to produce the woody molded article of the present invention, first, a wooden material W and a cotton-lumen thermoplastic resin are prepared.
(1) is mixed with a forced stirring mixer or the like. The mixing ratio is usually 3 by the weight ratio of the wood material W: the cotton lump thermoplastic resin (1).
0:70 to 90:10. In the above-mentioned mixing process, the cotton-lumen thermoplastic resin (1) solidifies while the fine fibers on the outer circumference of the chunk are entangled with each other to form a floc shape. The mixture is difficult to separate because it is entangled in such a state. Further, since all of the woody materials W in the raw material mixture are entangled as flocs, they can be uniformly mixed.

In order to produce a plate-like molded product, a raw material mixture mixed with a forced stirring mixer or the like is sprayed on a conveyor, and the thickness thereof is made uniform to some extent with a skewer roll called a laker. The raw material mixture, which has been mat-shaped to some extent uniformly, is scraped off with a scratching roll called "roller", ground again, scraped off on a rolling roll conveyor connected to a template or a hot roll conveyor, and dispersed to form a mat. By once forming a mat through the former (a laker or a spreader roll), the specific gravity unevenness of the mixture can be eliminated.

[0012] At this time, if the water content of the wood chips is high, the water acts as a binder, so that even if a finely-pulverized thermoplastic resin is used, it adheres evenly to the wood chips, so that when the wood chips are scraped off, Although it is difficult to separate from the thermoplastic resin, when hot pressing is performed later as in the present invention, there is a problem of generation of water vapor generated from the wood chips at the time of heating. If the thermoplastic resin is in powder or chip form, the wood chips of the mixture and the thermoplastic resin are separated and scraped off because there is no moisture as a binder, and even if it is made into a mat, it will not be a mat in which the thermoplastic resin is evenly distributed The strength after molding cannot be expected. Therefore, the thermoplastic resin must be in the form of a cotton lump and entangled with the wood piece, so that the wood piece and the thermoplastic resin are not separated and scraped off. Then, the mat is hot-pressed by a pressing device, a hot press device, a hot roll press or the like, and then the obtained mat is cooled.

When the mat M is formed on the template, the mat M may be hot-pressed by a press device, and the resulting molded mat may be cooled through a cold roll press. Are arranged and moved on a roll conveyor. If the raw material mixture is successively sprayed on the template and the mat M is formed, the productivity is improved. In this case, the mat formed on the template is in a fluffy state, so the thickness is slightly compressed by a roll press before hot pressing to prevent the mat from collapsing and to make it easier to transfer heat to the mat during thermoforming. It is desirable to keep. In this case, if the hot pressing is performed by a hot roll press, continuous operation is possible, and the production efficiency is improved. In addition, the method of spraying the mixture directly onto a roll conveyor to form the mat M is also capable of continuous operation, has high productivity, is inexpensive, and is economical. In this case, the cooling of the forming mat is desirably performed by a cold roll press. In the method in which the mat M is formed on the template and hot-pressed by a pressing device, it is preferable that the cooling be performed in the pressed state, and that the cooling is performed by the mat M and the template (2). If the units are stacked in multiple stages and pressed by a pressing device, the productivity is improved. In this case, the productivity is further improved by adopting a method in which the units are usually stacked on a carriage in multiple stages, pressed together, and carried into the heating chamber together with the carriage.

When the mat M is formed on a template, the surface of the template is provided with an uneven pattern, and when the molding mat is cooled by a cold roll press, at a subsequent stage of the cold roll press, Placing an embossing roll with an embossed pattern on the surface on one or both sides of the forming mat can provide a plate-like wooden molded article having an embossed pattern on one or both surfaces.

Further, the mold plate surface is formed into an arcuate or wavy curved surface, or three or more pairs of hot rolls are arranged in an arcuate or wavy shape,
If a molding mat is passed through it, a plate-like wooden molded body curved in an arc shape or a wavy shape can be obtained.

Further, the mat may have a multilayer structure such as two layers or three layers. In the case of three layers, a fine woody material (for example, a mixture of wood chips and wood flour) is used for the front and back layers, and a coarse woody material (for example, wood chips) is used for the core layer. It is possible to obtain a light-weight plate-like wooden molded product having a core layer having a rough structure, cushioning properties, and lightness.

In order to obtain a woody molded product other than a plate-shaped product, the above mixture is filled in a box having an inner surface having a desired shape, and an upper mold having a desired shape is pressed from above and heated. It is common to mold. In any of the molding methods, heating is applied by electric heating, high frequency heating, electromagnetic wave heating, steam heating, or the like.

The cotton lumps contain a large amount of air inside, and the air in the cotton lumps remains without being largely removed even by hot pressing, and when the cotton lumps are melted, a large number of voids are formed. It is formed in a product, and a lightweight molded product is obtained.

[Example 1] A lump of polypropylene as a lump of fiber waste generated during fiber spinning is used. The cotton lump (1) is an aggregate of single fibers T as shown in FIG. Cotton lump above (1)
A mixture A was prepared by rotating and stirring 50% by weight and 50% by weight of a wood chip W (1 to 5 mm in width, 5 to 15 mm in length, and 0.5 to 2 mm in thickness) with an Erich mixer for 2 minutes. Figure 2 shows the mixture
The flock F state as shown in FIG.

This mixture A was mixed with a former (1) as shown in FIG.
According to 2), the mixture A is scraped off again by the spreader roll (12B) while the thickness is being adjusted by the laker (12A), and the mixture A is moved on a roll conveyor as shown in FIG.
(2) Form the mat M on the top and press the front end compression roll press (13, 14) of a pair of upper and lower roll presses (13, 14) shown in FIG.
A, 14A), and compressed and shaped in the thickness direction by the compression roll press (13A, 14A), and then a pair of upper and lower heating chambers (15).
Heat press at 180-220 ° C. between hot roll presses (13B, 14B) heated by hot air or heat medium in the inside (pressing pressure 60 kgf / cm ² ), and forming as shown in FIG. The mat M 'is shaped by a rear end cold roll press (13C, 14C) of the roll press (13, 14) cooled by a water jacket (155) or the like (press pressure 5 kgf /
cm ² ), and a plate-shaped sample 1 was produced.

In the mat M, the wood pieces W and the cotton lump (1) are uniformly mixed as shown in FIG. 7, and the cotton lump (1) is filled between the wood pieces W while being entangled with the wood pieces W. I have. In the forming mat M 'formed by the hot roll press (13B, 14B), the circumference of the wood piece W is sealed by the cotton lump (1') as shown in FIG. Since the voids S are formed between the wood pieces W by the air contained in the cotton ingot, the weight is light.

Example 2 A waste polypropylene sheet was heated and melted, and made into cotton lump (1) by a rotary spinning machine having a small-diameter nozzle. 50% by weight of the cotton lump (1), 25% by weight of wood chips W (same as in Example 1), wood flour (1 mm or less opening) 2
A mixture B of 5% by weight was prepared in the same manner as in Example 1. Using the mixture B, a mat M was formed, heated and pressurized, and cooled in the same manner as in Example 1 to produce a plate-shaped sample 2.

Example 3 A waste polyethylene sheet was shredded into fine ribbon-shaped pieces, and further ground with a single disc refiner to form a cotton lump. The cotton lump
(1) 50% by weight, wood chip W 25% by weight, wood flour (mesh size 1mm
Hereinafter, a mixture C of 25% by weight is prepared in the same manner as in Example 1, and the mixture C is formed by the same former as in Example 1 and the front end compression roll press (13, 14) shown in FIG. 13A, 14A), and compressed and shaped in the thickness direction by the compression roll press (13A, 14A), and then heated by hot air or a heating medium in a pair of upper and lower heating chambers (15). Between hot roll presses (13B, 14B)
Hot press to 0 to 170 ° C to form (press pressure 60 k
gf / cm ² ), as shown in FIG. 10, the forming mat M ′ is shaped by the rear end cold roll press (13C, 14C) of the roll press (13, 14) cooled by a water jacket (155) or the like. After cooling (press pressure 5 kgf / cm ² ), the forming mat M ′ is then pressed by a pair of upper and lower embossing rolls (16A, 16B).
After embossing the upper and lower surfaces, transfer to the conveyor (18),
The plate-shaped sample 3 was manufactured by cutting to a predetermined size with a cutter (17).

Example 4 The mixture A of Example 1 was used as a template.
(2) Sprinkle on top to form mat M, and mold plate (2)
As shown in FIG. 11, the unit composed of the unit M and the mat M is connected to a multi-stage (1) through a spacer (3) (setting a thickness of 12.1 mm).
(Steps 0 to 15), and after loading the specified number of steps, it is carried into the pressing device (4), and the lower base (5) and upper base of the pressing device (4).
(6) is pressed, and the fixing arm (7) of the upper base (6) is fixed to the fixing flange (8) of the lower base (5) by a clamp rod (8) as shown in FIG. 9) Clamp by. The pressing pressure in this case is 60 kgf / cm ² . The multi-stage mat pressed by the pressing device (4) is placed on a trolley (10), and introduced into the heating chamber together with the trolley (10).
Heat at 50 ° C. for about 60-90 minutes. After heating, the carriage (10) is taken out of the heating chamber together with the trolley (10), left at room temperature for 2 to 3 hours in a pressed state, the sheet temperature is cooled down to about 100 ° C, and after cooling, the pressed state is released and the molding mat M ′ is released. Then, a plate-shaped sample 4 was manufactured.

Example 5 The mixture A of Example 1 was used as a template.
(2) Sprinkle on top to form mat M
Place the template (2) on the upper part, and place the unit consisting of the template (2) and the mat M on the spacer (3) (setting thickness 12.1mm)
, And inserted into a heating press (20) as shown in FIG.
Pressing was performed while heating at kgf / cm ² . Then decompress,
The molded mat M 'is put together with the upper and lower mold plates (2) in FIG.
The sample was inserted into a cold press (21) as shown in (1) and cooled while shaping at 5 kgf / cm ² to produce a plate-shaped sample 5.

Example 6 Mixtures D and E having the following compositions were prepared using the cotton wool (1) separated by a carding machine in the felt production process. Mixture for front and back layers D Cotton lumps 50% by weight Wood pieces (Example 1) 25% by weight Wood flour (Example 2) 25% by weight Mixture for core layer E Cotton lumps 30% by weight Wood pieces 70% by weight A mold that moves on a roll conveyor The mixture D was sprayed on a plate using a two-head former, the mixture E was sprayed thereon, and the mixture D was further sprayed thereon to form a mat M having a three-layer structure. The mat M having the three-layer structure was hot-pressed at a temperature of 260 to 300 ° C. and cooled in the same manner as in Example 1 to produce a plate-shaped sample 6 having a three-layer structure.

Example 7 Using the cotton lump (1) of Example 1, mixtures F and G having the following compositions were prepared. Mixture F for front and back layers Cotton lumps 30% by weight Wood chips (Example 1) 70% by weight Mixture for core layer G Cotton lumps 70% by weight Wood chips (Example 1) 30% by weight On a template using the same former as in Example 6 The mixture F was sprayed, the mixture G was sprayed thereon, and the mixture F was further sprayed thereon to form a mat M having a three-layer structure. The three-layered mat M was hot-pressed and cooled in the same manner as in Example 1 to produce a three-layered plate-shaped sample 7.

Example 8 A mixture H was prepared by mixing 70% by weight of the cotton lump (1) of Example 1 and 30% by weight of a piece of wood (Example 1). Wood flour (Example 2) was sprayed on a template using the same former as in Example 6, the mixture H was sprayed thereon, and the wood flour was further sprayed thereon to form a three-layered mat M. Formed. The mat M having the three-layer structure described above was used in Example 1.
Heating and cooling were performed in the same manner as described above, and a plate-shaped sample 8 having a three-layer structure was manufactured.

Example 9 A mixture I was prepared by mixing 30% by weight of the cotton lump (1) of Example 1 and 70% by weight of a piece of wood (Example 1). In the same manner as in Example 6, the above cotton lump (1)
Was spread on a template, the mixture I was sprayed thereon, and wood flour was further sprayed thereon to form a mat M having a three-layer structure. The mat M having the three-layer structure was heated and pressed in the same manner as in Example 1, and cooled to produce a plate-shaped sample 9 having a three-layer structure.

Table 1 shows the results of measurements of the physical properties of the plate samples 1 to 9 and a comparison with conventional OSB and plywood.

[Table 1]

As shown in Table 1, the plate samples 1 to 9 of Examples 1 to 9 have the same strength, flexure and specific gravity as OSB and plywood, but are superior in nail holding force to OSB and plywood. As compared with, the water absorption is remarkably small, so that the thickness swelling ratio due to water absorption is also small.

Samples 1, 4, and 5 using a large woody material such as a piece of wood are lightened by forming voids in some places, and a sample 2 is obtained by mixing wood chips with wood flour as a fine woody material. In Samples 3 and 6, the gap between the wood pieces is filled with the wood powder, so that the strength and the nail holding force are improved. In addition, by adopting a three-layer structure (samples 6 and 7), the lightness can be improved by the woody material-rich layer, and the nail holding power and water absorption can be improved by the thermoplastic resin-rich layer.

Further, by forming the front and back layers only of a wooden material (sample 8), when a wall panel or a floor panel is used, when a wall decorative sheet or a floor panel is adhered to the surface with an adhesive, the adhesiveness is as good as plywood. The water absorption is improved by the improvement and by constituting the front and back layers only with the thermoplastic resin (Sample 9).

Embodiment 10 The mat M of Embodiment 1 is shown in FIG.
Thompson which is hot-pressed between templates (2A, 2B) having a wavy curved surface as shown in Fig. 5 and protrudes from the templates (2A, 2B)
When cut at (22A, 22B), a corrugated plate-like wooden molding material M 'as shown in FIG. 16 is obtained.

Embodiment 11 As shown in FIG. 17, a plurality of pairs of cold rolls (23A, 24A, 23B, 24B, 23C, 24C, 23D, 24D, 23E, 2
4E, 23F, and 24F) and cut to a predetermined size with a cutter (25) to obtain a curved plate-like wooden molded product M 'as shown in FIG.

[0036]

According to the present invention, a cotton-lumen thermoplastic resin which is easily entangled with the wood material is used as a binder for the wood material.
It is possible to uniformly mix and form the woody material and the thermoplastic resin cotton lump without separating them. Further, as a result of the cotton lumps being entangled with the woody material and melting and binding, a high-strength molded body is obtained. The cotton lumps contain a large amount of air inside, and the air in the cotton lumps remains without being largely removed even by hot-pressure shaping.When the cotton lumps are melted, a large number of voids are formed in the molded product. As a result, a very lightweight molded body is obtained. The wood molded body of the present invention is a wall board, a floor board, a field board,
It is useful for architectural boards and furniture materials such as chair seat boards, chair backboards and table boards, or interior materials such as automobile door trims and tonneau boards.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a thermoplastic resin cotton lump.

FIG. 2 is an explanatory diagram of a state of a mixture after mixing.

FIG. 3 is an explanatory view of a former.

FIG. 4 is an explanatory diagram of a mat forming state.

FIG. 5 is an explanatory diagram of a process for manufacturing a wooden molded product using a template, a hot roll, and a cold roll.

FIG. 6 is an explanatory view of a cooling process using a cold roll.

FIG. 7 is an explanatory view of a mat structure before heating.

FIG. 8 is an explanatory view of a molded mat structure after heating.

FIG. 9 is an explanatory view of a process for producing a wooden molded product using a hot roll and a cold roll.

FIG. 10 is an explanatory view of a cooling process using a cold roll.

FIG. 11 is an explanatory front view before pressing.

FIG. 12 is an explanatory side view of a pressed state.

FIG. 13 is an explanatory view of a heating press device.

FIG. 14 is an illustration of a cold press machine.

FIG. 15 is an explanatory view of a pressed state of a corrugated plate-like wooden molded product.

FIG. 16 is a perspective view of a corrugated plate-like wooden molded product.

FIG. 17 is an explanatory view of a pressed state of a curved plate-like wooden molded product.

FIG. 18 is a perspective view of a curved plate-like wooden molded product.

[Explanation of symbols]

 1 Cotton wool of thermoplastic resin W Wood piece (woody material) M Mat 2 Mold plate 4 Compression device 13A, 14A Compression roll press 13B, 14B Hot roll press 13C, 14C Cold roll press

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B29C 43/02 B29C 43/02 43/22 43/22 E04C 2/24 E04C 2/24 Q // B29K 105 : 16 B29K 105: 16 105: 26 105: 26 F term (reference) 2B260 AA03 AA11 AA20 BA01 BA02 BA04 BA05 BA15 BA18 BA19 CA02 CB01 CB04 CC01 CD02 CD03 CD04 CD06 CD07 CD09 CD10 EA01 EA04 EA05 EB02 EB04 EB06 EB15 EB19 EB19 EB19 EC18 2E162 FC01 FC03 FD05 4F204 AA04 AA09 AA11 AA50 AB25 AF01 AG01 AG03 AK01 AK02 FA06 FA11 FA18 FB02 FB22 FF01 FH18 FN15 FQ08 FQ23 FQ26 FQ32

Claims (10)

[Claims] 1. A wooden molded article obtained by heating and molding a raw material mixture obtained by mixing a wooden material and a cotton-lumen thermoplastic resin. 2. The wood molded article according to claim 1, wherein said cotton-lumen thermoplastic resin is produced from waste thermoplastic resin. 3. A raw material mixture containing a woody material and a cotton-lumen thermoplastic resin is sprayed on a template moving on a roll conveyor to form a mat, and the mat is shaped by a roll press and then heated. And heated to a temperature equal to or higher than the softening point of the cotton-lumen thermoplastic resin, and molded.The resulting molded mat is cooled through a cold roll press or cooled by a cold press. Characteristic method for producing a wooden molded body 4. A raw material mixture containing a wood material and a cotton-lumen thermoplastic resin is directly sprayed on a roll conveyor to form a mat, the mat is shaped by a roll press, and then passed through a hot roll press. A woody molded article formed by heating and molding to a temperature equal to or higher than the softening point of the cotton-lumen thermoplastic resin, and cooling the obtained molding mat through a cold roll press or cooling by a cold press. Manufacturing method 5. The wooden molded product according to claim 3, wherein an embossing roll having an uneven pattern on its surface is disposed on one or both sides of the molding mat at a stage subsequent to the cold roll press. Manufacturing method 6. A raw material mixture containing a woody material and a cotton-lumped thermoplastic resin is sprayed on a template to form a mat, and the mat is heated and pressed at a temperature equal to or higher than the softening point of the cotton-lumped thermoplastic resin. Wherein the obtained mat is cooled by passing through a cold roll press or cooled by a cold press. 7. The method according to claim 6, wherein the units comprising the mat and the template are stacked in multiple stages. 8. A raw material mixture containing a wood material and a cotton-lumped thermoplastic resin is sprayed on a template to form a mat, and the mat is pressed to a temperature higher than the softening point of the cotton-lumped thermoplastic resin. A method of manufacturing a wooden molded body, wherein the molded mat is cooled by heating to a temperature of 3 ° C., and then the molded mat is cooled in a pressed state, and the compressed state is released after cooling. 9. The method according to claim 8, wherein the units composed of the mat and the template are stacked and pressed in multiple stages. 10. The method according to claim 3, wherein said cotton-lumen thermoplastic resin is produced from waste thermoplastic resin.