JP2015071245A - Composite glued laminated timber and method of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide composite glued laminated timber that does not cause separation of wood and that hardly causes distortion, and a method of manufacturing the same.SOLUTION: A manufacturing method for obtaining composite glued laminated timber 1 having wood 3 brought into intimate contact with at least one of four side surfaces of a resin core material 2 includes: an insertion step of inserting the wood 3 into at least one side surface of a cavity 6d within a cylindrical molding tool 6; an injection step of pressure-injecting a resin from a tip of the molding tool 6; and a take-out step of taking out the composite glued laminated timber 1 from the molding tool after cooling and solidifying it.

Description

  The present invention relates to a composite laminated material suitable for applications such as various structural materials such as building materials and industrial materials, frame plates, scaffolding plates, or track sleepers, and a method for manufacturing the same.

  Conventionally, wood has been widely used as a structural material, but has a problem that it is inferior in durability because it is vulnerable to corrosion and damage, and physical properties are reduced by water absorption. There was also a problem in supply stability due to lack of resources. In order to cope with these problems, composite laminated materials in which wood is laminated on a concrete core material or a resin core material are known.

  However, the conventional composite laminated wood is made by adhering wood to a concrete core material or resin core material with small irregularities on the surface with an adhesive, or attaching wood with metal fittings such as nails, so that the molded body and wood are in close contact It is difficult to integrate, and even if integrated, there is a problem that the wood peels off from the gap between the core and the wood, or noise is generated when the wood on the upper surface of the gap is hit. . Furthermore, since the distortion of the concrete core material or the resin core material appears on the surface of the wood as it is, there is a problem in using it for building materials or sleepers.

  Accordingly, an object of the present invention is to solve the above-mentioned problems of a conventional composite core material composed of a concrete core material or a resin core material and wood, and to provide a composite aggregate material with no peeling of the wood and less distortion, and a method for producing the same. That is.

  As a result of intensive studies to achieve the above object, the present inventors have inserted wood into at least one side of a cavity in a cylindrical mold, or a molded body of wood molded into a cylinder in a cylindrical mold. As a result of further investigation, the composite laminated material molded by injecting the resin into the mold without being strained is not distorted and the resin core material is closely integrated with the wood. I came up with it.

  That is, in the method for producing a composite laminated material for obtaining a composite laminated material in which wood is in close contact with at least one of the four side surfaces of the resin core material of the present invention, the wood is inserted into at least one side surface of the cavity in the cylindrical mold. An insertion step, an injection step in which resin is injected under pressure from the tip of the mold, and a take-out step of taking out the composite laminated material from the mold after cooling and solidification.

  According to this configuration, after inserting the plate-shaped wood into the mold, the molten resin is injected under pressure, so that the molten resin is strongly pressed against the surface of the wood and the wood and the resin are closely integrated. Therefore, a composite laminated material with small distortion can be obtained without peeling off the wood and the resin core material.

  The manufacturing method of the composite laminated material for obtaining the composite laminated material in which the wood molded into the rectangular cylindrical shape of the present invention and the resin core material injected into the wooden material is in close contact with each other is obtained by the rectangular cylindrical shape in the rectangular cylindrical mold. An insertion step of inserting a molded body of wood molded into a mold, an injection step of pressurizing and injecting resin into the wood formed into a square cylinder from the tip of the mold, and after cooling and solidifying, And taking out the composite laminated material from the mold.

  According to this structure, the molten resin is strongly pressed against the surface of the wood so as to inject the molten resin under pressure after inserting the molded body of the wood molded into a square cylinder into the square cylinder-shaped mold. And resin are closely integrated. Therefore, a composite laminated material with small distortion can be obtained without peeling off the wood and the resin core material.

  In the method for producing a composite laminated material of the present invention, a plurality of through holes or a plurality of grooves into which resin enters the wood may be provided, and the wood may be inserted into the mold in the insertion step. According to this configuration, since the resin enters the plurality of through holes or the plurality of grooves provided in the wood and the wood and the resin are fixed, there is no possibility of peeling.

As an example of the method for producing the composite laminated material of the present invention, wood is inserted into both side surfaces of a cylindrical mold having a resin inlet at the tip, or molded into a square cylinder in the cylindrical mold. Following the insertion step of inserting the wood molded body, a plate-like moving body is inserted into the rear end opening of the mold, and the rear end opening of the cylindrical mold is closed, and then in the injection step, Resin is injected from the injection port at the front end of the cylindrical mold into the cylindrical mold at a discharge pressure of 120 to 180 kg / cm ² , and it is detected that the plate-like moving body has moved to the rear end opening of the mold. Then, the injection of the resin is stopped, and after the mold is immersed in the cooling water tank and cooled in the above-described extraction step, the composite laminated material in the mold is moved by the extrusion cylinder from the resin injection port of the mold. Then, the composite laminated material may be extruded from the mold by the take-out cylinder. Thereby, the production efficiency of a composite laminated material improves.

  In the composite laminated material of the present invention, it is preferable that a core material made of resin is accommodated in a square cylindrical wood, and the resin is filled in a through hole or a groove of the wood.

  In the method of manufacturing the composite laminated material of the present invention, the plate-like wood is inserted into the mold, and then the molten resin is injected under pressure. It becomes. Therefore, a composite laminated material with small distortion can be obtained without peeling off the wood and the resin core material.

It is a perspective view of the composite laminated material concerning one Embodiment of this invention. It is a perspective view of the composite laminated material concerning other embodiment of this invention. It is a perspective view of the composite laminated material concerning other embodiment of this invention. It is a perspective view of the composite laminated material concerning other embodiment in FIG. It is a perspective view of the composite laminated material concerning other embodiment of this invention. It is sectional drawing which shows the example which provided the through-hole in the timber in FIG. It is process drawing which shows each process of the manufacturing method of the composite laminated material of this invention.

  Next, an embodiment of the composite laminated material of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a composite laminated material 1 in which wood 3 is tightly integrated with the lower surface of a resin core material 2, and FIG. 2 is a composite laminated material in which wood 3 is closely integrated with both end surfaces of the resin core material 2. 1 is a perspective view of FIG. FIG. 3 is a perspective view of the composite laminated material 1 in which the wood 30 formed into a rectangular tube shape and the resin core material 2 injected into the wood are closely integrated. As shown in FIG. 4, if a wooden decorative board 5 obtained by thinly slicing wood is bonded to the surface of the composite laminated material 1 via an adhesive layer 4, a high-quality wood-like building material can be provided. As the adhesive layer, an epoxy resin adhesive, a urethane resin adhesive, or the like is suitable.

  If the wood used for the composite laminated material 1 of the present invention is composed of hard wood that has little thermal expansion and is difficult to dry and shrink, the wood is less likely to expand in the molding die, and the composite laminated wood is formed from the mold. Is easy to take out. In addition, peeling or the like due to the difference in shrinkage from the resin core material is difficult to occur. By adopting hard wood, durability against impacts and the like can be enhanced. Hardwood is generally hardwood, especially oak, oak, zelkova, mahogany, teak, walnut, tamo, linden, merkaba, chestnut, mable, cherry, beech, kunugi, camphor, kempas, etc. .

  On the other hand, even if it is something other than hard wood, if the compression material is adopted, the same effect as that obtained when the hard wood is adopted can be obtained. For example, coniferous compression materials such as cedar, cypress, pine, hiba and cherry are preferably used. In particular, cedar has a beautiful grain and is expected to have a healing effect due to its unique scent as well as insect and fungicidal effects. In addition, when the thickness ratio (thickness after compression / thickness before compression) is compressed to 40 to 60%, there is little shrinkage after construction, and an effect excellent in strength, heat insulating properties, and humidity conditioning properties is exhibited. . Since thinned wood can be used for wood, using thinned wood can contribute to the effective use of wood resources and can be expected to contribute to environmental conservation.

  Since the wood 3 is accommodated in the cavity 6d in the cylindrical mold shown in FIG. 7, it is not destroyed by the injection pressure of the resin 2, so that the wood 3 having an appropriate thickness is used depending on the purpose of use. Is done. Usually, wood 3 having a thickness of 10 mm to 30 mm is used. In order to peel the resin core material 2 and the wood 3 or to form the through hole 31 or groove for preventing removal shown in FIG. 6, a thick wood 3 of 20 mm or more is used.

Examples of the resin 2 for the resin core material include thermoplastic resins such as polyethylene, polypropylene, polyester, styrene, polyamide, and polysulfonic acid, and recycled resins obtained from wastes of resin products molded with the thermoplastic resin. Used. In order to impart flame retardancy to the resin core material 2, a flame retardant such as aluminum hydroxide may be mixed.
The resin core material 2 can have an appropriate thickness depending on the purpose of use. For example, it can be 20 to 50 mm for flooring, 10 to 30 mm for wall and roofing materials, and 50 to 150 mm for pillars.

  As shown in FIG. 5, the wood 3A, 3B on the upper and lower sides, and the left and right woods 3C, 3D are arranged between them to make a rectangular tube shaped wood molded body 30A. Since the wood molded body 30A covers the outer periphery of the resin core material 2 with four pieces of wood 3A, 3B, 3C, and 3D, fine cracks generated inside the composite laminated material 1 can be visually confirmed.

  In the embodiment shown in FIG. 6, a through-hole 31 composed of a plurality of circular holes penetrating from the outer surface to the inner surface is provided in the flat rectangular cylindrical wood molded body 30 </ b> A shown in FIG. 5. Thereby, when the resin 2 flows into the through-hole 31 and is cooled and solidified, the wood 3A, 3B, 3C, 3D and the resin core material 2 are fixed, so that the wood 3A, 3B, 3C, 3D There is no possibility that the resin core material 2 is peeled off. The position and number of the through holes 31 are not limited to this. In the embodiment shown in FIG. 6, the through holes 31 are provided, but a plurality of grooves 11 indicated by two-dot chain lines may be provided on the inner surface of the wood instead of the through holes 31. A plurality of through holes 31 or a plurality of grooves 11 may be provided in the rectangular cylindrical wood 30 shown in FIG.

Next, the manufacturing method of the composite laminated material 1 concerning embodiment of this invention is demonstrated, referring FIG. The manufacturing process of the composite laminated material 1 includes the step of inserting the wood 3 into at least one of the four side surfaces of the cavity 6d in the cylindrical mold, or inserting the molded body of the wood 30 molded into a square cylinder. (FIG. 7A), the step of injecting the resin 2 into the mold (FIG. 7B), the step of cooling the mold 6 (FIG. 7C), and the composite laminated material 1 from the mold 6 It is composed of four steps of the extraction step (FIG. 7D).
The molding die 6 has a rectangular tube shape having a molten resin injection port 6a at the front end and an opening at the rear end. In the cavity 6d, a draft is provided so that the width increases toward the rear end opening 6b so that the composite laminated material 1 can be easily taken out from the rear end opening 6b. The details of the manufacturing method will be described by taking the composite laminated material 1 shown in FIG. 1 as an example.

Step of Inserting Wood Molded Body In the step of inserting the wood of FIG. 7A from the rear end opening 6b of the mold 6, in the case of the plate-like wood 3 (FIG. 1), for example, the wood along the left side surface of the cavity 6d 3 is inserted up to the tip 6c of the cavity 6d. In the case of the composite laminated material 1 shown in FIG. 2, when the wood 3 is inserted into the left and right side surfaces of the cavity 6d, the composite laminated material 1 having a sandwich structure in which the wood 3 sandwiches the resin core material 2 can be manufactured. Similarly, the molded body of the wood 30 formed into a square cylinder shape as shown in FIG. 3 is inserted from the rear end opening 6b of the cavity 6d to the front end 6c of the cavity 6d. A plate-like moving body 8 that closes the opening 6b is inserted into the rear end opening 6b of the cavity 6d by a cylinder 9 to a predetermined depth h, for example, 3 to 10 cm from the rear end opening 6b. In FIG. 7A, the plate-like wood 3 (molded body) is pressed by the cylinder 7 and inserted into the cavity 6d.

Resin Injection Step In the resin injection step shown in FIG. 7B, the mold 6 is moved to the next station, and 120 to 180 kg / cm ² from the injection port 6a of the resin 2 to the cavity 6d in the cylindrical mold. Resin 2 is injected at a discharge pressure. When the sensor (not shown) detects that the plate-like moving body 8 has moved to the rear end opening 6b of the mold 6, the injection of the resin 2 is stopped.

Mold Mold Cooling Step In the mold die cooling step of FIG. 7C, the mold 6 is further moved to the next station, the mold 6 is immersed in the cooling water tank 11 and cooled, and the resin 2 is solidified.

Extraction Process In the extraction process of FIG. 7D, the composite laminated material 1 in the cavity 6 d is extruded from the mold 6 through the extrusion cylinder 12 from the injection port 6 a of the resin 2 of the mold 6. Thereby, shaping | molding of the composite laminated material 1 is completed.

  In this composite laminated material 1, after the plate-like wood 3 is inserted into the cavity 6 d in the mold, the molten resin 2 is injected under pressure, so that the molten resin is strongly pressed against the surface of the wood 3 and the wood 3 and the resin 2 are tightly integrated. Therefore, peeling of the wood 3 and the resin core material 2 is prevented.

The composite laminated material 1 formed from the wood 3 and the resin core material 2 of the present invention has the following characteristics as a building material and an industrial material.
-Due to the laminated structure of resin core material and wood, it has higher strength and less variation than wood. Therefore, it can be used with peace of mind as building materials and industrial materials.
-Since composite laminated wood is excellent in soundproofing and heat insulating properties, it can provide an energy-saving house with excellent soundproofing when used as a house building material.

  The composite laminated material 1 is produced by a method of sticking with a conventional adhesive or a method of attaching with a metal fitting such as a nail, or peeling from a gap portion generated between the core material and wood, or a resin core. Since it is not affected by the distortion of the material, peeling of the wood and the resin core material can be prevented. Further, when a plurality of through holes 31 or a plurality of grooves 11 into which the resin 2 enters the wood 3 is provided, the wood 3 and the resin core material 2 are fixed, and the wood 3 and the resin core material 2 are separated. Is prevented.

  The preferred embodiments of the present invention have been described above with reference to the drawings. However, various additions, modifications, or deletions can be made without departing from the spirit of the present invention. Included in range.

1 Composite Glue 2 Resin (Resin Core)
3 Plate-like wood (molded body)
4 Adhesive layer 5 Wood decorative board 6 Mold 6a Inlet 6b Rear end opening 6c Front end 6d Cavity 7 Cylinder 8 Moving body 9 Cylinder 11 Cooling water tank 12 Extrusion cylinder 30 Square wood (molded body)
31 Through hole

Claims (5)

A method for producing a composite laminated material having a resin core material and wood laminated thereon,
An insertion step of inserting wood into at least one side surface of the cavity in the cylindrical mold;
An injection step of pressure-injecting resin from the tip of the mold;
A step of taking out the composite laminated material from the mold after being cooled and solidified, and
A method for producing a composite laminated material, wherein a composite laminated material is obtained in which wood is adhered to at least one of the four side surfaces of a resin core material. A method for producing a composite laminated material in which a resin core material is housed in wood formed into a rectangular cylinder,
An insertion step of inserting a molded body of wood molded into a square cylinder into a square cylinder mold;
An injection step of pressurizing and injecting resin into the wood formed into a square cylinder from the tip of the mold;
A step of taking out the composite laminated material from the mold after being cooled and solidified, and
A method for producing a composite laminated material, which obtains a composite laminated material in which wood formed into a rectangular cylinder and a resin core material injected into the wood are in close contact.   3. The method for producing a composite laminated material according to claim 1 or 2, wherein a plurality of through holes or a plurality of grooves into which resin enters the wood is provided, and the wood is inserted into the mold in the insertion step. In the manufacturing method of the composite laminated material as described in any one of Claim 1 to 3,
Following the insertion process of inserting wood into both sides of a cylindrical mold having a resin inlet at the tip, or inserting a molded body of wood molded into a square cylinder into the cylindrical mold, Insert a plate-shaped moving body into the rear end opening of the mold, and close the rear end opening of the cylindrical mold.
Thereafter, in the injection step, resin is injected into the cylindrical mold from the injection port at the front end of the cylindrical mold at a discharge pressure of 120 to 180 kg / cm ² , and the plate-like moving body is placed after the mold. Stops the resin injection when it detects that it has moved to the end opening,
Thereafter, in the take-out step, the mold is immersed in a cooling water bath and cooled, and then the composite laminated material in the mold is moved by an extrusion cylinder from the resin injection port of the mold, and then the composite laminated material is taken by the take-out cylinder. A method for producing a composite laminated lumber that extrudes from a mold. A composite laminated material obtained by the production method of claim 3,
A core material made of resin is contained in a square cylindrical wood,
A composite laminated material in which the resin is filled in the through holes or grooves of the wood.

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