JP2008265156A - Manufacturing method for plywood, and plywood - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a nodule of a plywood from falling by combining a plurality of rotary veneers made of Hokuyo-zai (wood from Siberia) or the like into a plywood specification without drying them, laminating-bonding, integrating and drying them. <P>SOLUTION: After combining a plurality of the veneers 1 and 4 formed into a prescribed dimension into the plywood specification without drying them, they are laminated-integrated, and dried to obtain the plywood 5 or veneer laminated units 6 and 7. Also, a plywood 8 having a large thickness is obtained by superposing-bonding the obtained veneer laminated units 6 and 7. When the plywood 5 or the veneer laminated units 6 and 7 are combined, existing nodules 3 on the veneers 1 and 4 are prevented from overlapping. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method for manufacturing a plywood in which a missing portion due to a dead node or the like existing on a veneer is prevented, and the plywood.

  Plywood is widely used because it has a large area and is easy to process. The present invention relates to a method of manufacturing plywood used for interiors of houses such as flooring and wall materials and plywood obtained thereby, and in particular, plywood used for flooring uses a thick plywood having a thickness of 12 to 15 mm, and has an upper surface. The present invention relates to a plywood formed by attaching a decorative veneer or the like.

  Usually, plywood is dried and cut to a predetermined size, and in many cases, the plywood is laminated to a plywood specification so that there are three to five layers or more, and then bonded and integrated. Obtained. The plywood specification is, for example, configured such that the fiber directions of the single plates forming the layers are orthogonal to each other and the total thickness of the single plates in each fiber direction is substantially equal, and the number of layers is not a problem. .

  In recent years, however, South Seawood from which excellent veneers such as Lawan and Kapol have been obtained has become difficult to obtain due to resource depletion and resource national rhythms, etc. ing.

Such North Sea lumber has defects that are not found in South Sea lumber when it is made into plywood due to its life and death, and various studies have been made to solve it.
Japanese Utility Model Publication No. 5-96282 (page 6, FIG. 1) Utility Model Registration No. 2516001 Publicity (Page 15, Figure 1)

  Each of those described in Patent Document 1 and Patent Document 2 is intended to eliminate the disadvantages of plywood using a North Pacific veneer. In Patent Document 1, a medium-sized fiberboard is used for the surface portion of the plywood of the North Sea wood veneer. As a result, the surface property of the plywood is improved, but a process of making a base material by a plywood board of a north sea wood veneer and a process of sticking a medium fiberboard to the surface of the base material are required.

  On the other hand, what is shown in Patent Document 2 uses a non-defective south sea wood veneer for the first layer of the plywood when making the plywood from the north sea wood veneer.

  Both of these patent documents solve the shortcomings of the plywood of the North Sea wood veneer by combining other materials with the use of the North Sea wood veneer. It does not eliminate the point where the missing part due to the knot, in particular, the omission occurs.

  The present invention uses a rotary veneer so that it becomes a plywood specification without drying it, and by bonding and integrating it, it can easily prevent defects such as cutouts and efficiently make a thick plywood It can be produced well.

  In order to solve the above-mentioned problems, a first characteristic configuration of a method for manufacturing a plywood according to the present invention is that, as described in claim 1, a plurality of single plates formed in a predetermined size are used without drying. After being assembled, it is bonded and then dried together.

  As described in claim 2, the second characteristic configuration is that a plurality of single plates formed in a predetermined size are assembled so as to have a plywood specification without drying, and then bonded, integrated, and dried. A single plate laminated unit is obtained, and a plurality of obtained single plate laminated units are polymerized and bonded to form a plywood having a constant thickness.

  In the third feature configuration, as described in claim 3, in addition to either the first feature configuration or the second feature configuration, the third feature configuration is constructed so that the nodes existing in adjacent single plates do not overlap. It is in.

  According to the fourth feature of the present invention, as described in claim 4, a plurality of single plates each having a predetermined size are assembled so as to have a plywood specification without drying, and then bonded, integrated, and dried. The point is plywood.

  Since the manufacturing method of the plywood according to claim 1 has the above-described configuration, there is no lacking part such as a cutout caused by a loss of a dead node accompanying drying of a rotary veneer such as a North Sea material.

  The method for manufacturing a plywood according to claim 2, having the above-described configuration, makes a single-plate laminated unit such as a North Sea material which is thinner than a case where a plurality of single-plates are assembled to constitute a plywood, and the plurality of single-plate laminated units Are laminated and adhered. Since a thin single-plate laminated unit is created in this way, the drying time by hot pressing can be shortened, and the time for hot pressing can be shortened compared to the case where a plurality of single-plate laminated units are superposed and bonded to form a thick plywood at once. .

  Since the manufacturing method of the plywood of Claim 3 is the said structure, in addition to the effect which the manufacturing method of the plywood or the single-plate laminated unit of Claim 1 or Claim 2 has these parts, There are no duplicates of defects.

  The plywood according to claim 4 has the above-described configuration, and even when a rotary single plate such as a North Sea material is used, no pitting is generated, so that even when a decorative material is applied to the surface of the plywood, a missing portion due to the pitting appears on the surface. There is no. Moreover, since the fiber directions are orthogonal to each other as in a normal plywood, the dimensional stability is good.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is an exploded perspective view of a plywood 5 made of North Sea wood according to the present invention. Reference numerals 1 and 4 are North American rotary veneers, 2 is a wood part, and 3 is a node part.

  The single plate 1 is used as a surface material, and the single plate 4 is used as an intermediate plate. The single plate 1 of the surface material and the single plate 4 of the intermediate plate are structured so that their fiber directions are orthogonal.

  The raw wood provided to the plywood 5 is stored underwater in a storage to prevent dry cracks, etc., and after landing, it is cut to a certain size and used as a surface material or intermediate board in a rotary 1 4 is obtained. When the rotary single plates 1 and 4 are directly dried, the contraction ratios of the wood part 2 and the node part 3 are different, and the shrinkage of the tree part 2 is large, so that the node part 3 falls off and a dropout occurs. In particular, the dead node is easy to fall off because the fiber is not connected to the xylem 2.

  In the present invention, the rotary single plates 1 and 4 of the North Sea material are mechanically bonded so as to have a plywood specification without drying, and after drying, they are dried. In other words, the North American rotary veneers 1 and 4 are laminated before being shrunk, integrated and dried, and even if it is a dead node, the node 3 is dropped by being bonded to another adjacent veneer. Disappears. A hot press is used for laminating and drying, or high-frequency heating is used simultaneously with the pressing.

  In the present invention, the rotary single plates 1 and 4 of the North Sea material are dried simultaneously with the bonding. For this reason, if the entire laminated single plate is thick, it takes a long time to dry to the inside.

  The rotary single plate thus constructed is bonded and integrated in a laminated state to form a plywood and dried at the same time. As the adhesive, commonly used aqueous adhesives such as urea, vinyl acetate, and phenol are used. In this way, the plywood 5 using the rotary single plates 1 and 4 made of North Sea material is formed.

  FIG. 2 is a cross-sectional view of each of the two types of single-plate lamination units 6 and 7, and FIG. 3 is a cross-sectional view of a thick plywood 8 obtained by laminating the two types of single-plate lamination units 6 and 7. When making plywood by the method of the present invention, the mechanism is such that a large number of dry rotary single plates become plywood specifications, and the adhesive is cured by heating to the inside of the plywood, so when the plywood 8 is a thick plate, Long press time is required. In order to cope with this problem, in the present invention, two types of single-plate lamination units 6 and 7 constructed so as to have the plywood specification shown in FIG. 2 are configured. As shown in FIG. A plurality of units 6 and 7 are laminated to form a plywood 8 having a constant thickness. The thickness and configuration of the single-plate laminated units 6 and 7 shown in FIG. 2 can be arbitrarily selected. In this way, various thick plywoods 8 can be manufactured. Since the single plate laminated units 6 and 7 are thinner than the plywood 8, the hot pressing time is short. Therefore, when producing the plywood 8 by laminating and integrating the single plate lamination units 6 and 7, the single plate lamination units 6 and 7 can be constituted by cold pressure bonding since they are already dried. As a result, the hot press operating time can be shortened as compared to the case where a large number of single plates are laminated at one time to produce a thick plywood 8.

  In making the plywood 5 and the single-plate laminated units 6 and 7, it is structured so that the joint portions 3 of the single plates 1 and 4 do not overlap. This is to prevent the occurrence of a major defect due to the overlapping of the node portions 3.

  As described above, according to the present invention, the rotary single plates 1 and 4 made of North Sea material are bonded together without drying and dried together. Therefore, there is an advantage that the mechanism can be easily made because the joint portions 3 of the rotary single plates 1 and 4 are not cut out and the single plate is not distorted by drying. According to the present invention, since there is no cutout on the surface of the plywood, surface decoration can be easily performed. The obtained plywood 5 has no dimensional change because the fiber direction is the same as that of a general plywood.

  Further, the use of the single-plate laminated units 6 and 7 has an advantage that the thick plywood 8 can be easily formed because the hot pressing time can be shortened.

It is a disassembled perspective view which shows one Example of this invention. It is sectional drawing of each of two types of single-plate lamination | stacking units 6 and 7 which concern on this invention. It is sectional drawing of the thick board plywood 8 obtained by laminating | stacking the said 2 types of single-plate lamination | stacking units 6 and 7. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Single board 2 Single board wood part 3 Node 4 Single board 5 Plywood 6 Single board laminated unit 7 Single board laminated unit 8 Thick board plywood

Claims (4)

  A method for producing plywood, in which a plurality of single plates each having a predetermined size are assembled to a plywood specification without being dried, and then bonded, integrated, and dried.   After preparing a plurality of single plates formed to a predetermined size without drying, they are bonded and integrated and dried to obtain a single plate laminated unit. A method for producing plywood by plying with a certain thickness by polymerization adhesion.   The method for manufacturing a plywood according to any one of claims 1 to 2, wherein the joints are arranged so that nodal portions existing in adjacent single plates do not overlap each other.   A material plywood formed by bonding a plurality of single plates formed in a predetermined size to a plywood specification without drying, and then bonding them together and drying them.

Images