EP1930523A2 - Verfahren zur Herstellung einer Trägerplatte für Parkett - Google Patents

Verfahren zur Herstellung einer Trägerplatte für Parkett Download PDF

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Publication number
EP1930523A2
EP1930523A2 EP07397041A EP07397041A EP1930523A2 EP 1930523 A2 EP1930523 A2 EP 1930523A2 EP 07397041 A EP07397041 A EP 07397041A EP 07397041 A EP07397041 A EP 07397041A EP 1930523 A2 EP1930523 A2 EP 1930523A2
Authority
EP
European Patent Office
Prior art keywords
lay
laths
sawn timber
faces
grooves
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP07397041A
Other languages
English (en)
French (fr)
Other versions
EP1930523A3 (de
Inventor
Matti Roivas
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Olavi Rasanen Oy
Original Assignee
Olavi Rasanen Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Olavi Rasanen Oy filed Critical Olavi Rasanen Oy
Publication of EP1930523A2 publication Critical patent/EP1930523A2/de
Publication of EP1930523A3 publication Critical patent/EP1930523A3/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
    • B27M3/00—Manufacture or reconditioning of specific semi-finished or finished articles
    • B27M3/04—Manufacture or reconditioning of specific semi-finished or finished articles of flooring elements, e.g. parqueting blocks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
    • B27M1/00—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching
    • B27M1/08—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching by multi-step processes
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00—Flooring
    • E04F15/02—Flooring or floor layers composed of a number of similar elements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00—Flooring
    • E04F15/02—Flooring or floor layers composed of a number of similar elements
    • E04F15/04—Flooring or floor layers composed of a number of similar elements only of wood or with a top layer of wood, e.g. with wooden or metal connecting members
    • E04F15/048—Flooring or floor layers composed of a number of similar elements only of wood or with a top layer of wood, e.g. with wooden or metal connecting members with a top surface of assembled elongated wooden strip type
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00—Flooring
    • E04F15/02—Flooring or floor layers composed of a number of similar elements
    • E04F15/04—Flooring or floor layers composed of a number of similar elements only of wood or with a top layer of wood, e.g. with wooden or metal connecting members

Definitions

  • the invention relates to a method of manufacturing a parquet base, in particular of manufacturing a slab parquet base.
  • a conventionally manufactured slab parquet consists, first of all, of so-called intermediate laths which are laths sawn out of timber, having a given length, a given width and a given thickness.
  • the lath length and thickness are determined by the width and thickness of the parquet slab to be manufactured, respectively.
  • the lath width can be chosen more freely in terms of the manufacturing technique, by giving appropriate consideration to the available raw material and the humidity conditions of the application site.
  • the laths are set laterally parallel to each other, into a flat lay-up on bottom veneer, especially softwood veneer.
  • the aim is to leave a small gap for motion between the parallel laths in order to reduce the effects of the humidity-related stretching and contracting of the wood in the finished parquet slab.
  • the dimensions of the bottom veneer substantially equal to the dimensions of the parquet slab to be manufactured, and such a number of laths are set thereon parallel to each other that the lay-up corresponds to the length of the parquet slab to be manufactured.
  • Glue can be applied to one side of the laths to be set into the lay-up, or alternatively to the bottom veneer.
  • the bottom veneer and laths are adhered to each other by curing the glue under pressure and heating, to obtain a parquet slab blank.
  • the lath lay-up is created on the bottom veneer by using laths with glue on both sides, and the lay-up is finished by providing the lay-up with a parquet face, continuous wood-veneer or veneer-lath face.
  • the three-layered structure thus obtained is adhered into an integrated structure by curing the glue under pressure and heating.
  • the tongues and grooves necessary for connecting the parquet slabs together are machined in the intermediate laths.
  • the intermediate laths used for the base structure are sawn out of timber, into blocks of the required size, the sawing operation being performed so that the grain direction coincides with the longitudinal direction of the lath and so that the annual rings in the cross-section of the lath mainly run in the direction of thickness of the lath.
  • the manufacturing method according to the invention is substantially capable of elininating the above-described problems related to the manufacture of a parque slab.
  • the method according to the invention is applied to the manufacture of a parquet slab whose base structure consists of wood laths which have a substantially uniform length, a substantially uniform thickness and a substantially uniform width and which are set to extend longitudinally, laterally parallel to each other in the lateral plane, at a given side-by-side distance from each other, and which, on one lateral face, are attached to a binding sheet extending substantially over the faces.
  • the laths are obtained by providing sawn timber having a double lath height and a multiple lath width, at alternating positions on opposite sides, with longitudinal, adjacent grooves substantially perpendicular to the faces, which extend at least to the depth of intersection, by setting the grooved sawn timber into a flat lay-up side by side, by attaching a binding sheet to each face of the sawn timber lay-up and by cleaving the lay-up with the binding sheets at the intersecting or overlapping depth of the grooves.
  • the parquet slab can be manufactured, for example, from sawn timber having the following cross-sectional dimensions 22 x 125 mm and an optional length (extendable, for example, with a finger joint, if necessary). This timber is cut to size, such as into lengths of 700 mm or 1400 mm.
  • the cut-to-size boards are planed at their both flat faces, and the both flat faces are provided with grooves, which run in the longitudinal direction of the board and extend perpendicularly from the flat faces to a given depth, by sawing.
  • the opposite faces are provided, at alternating different positions, with identical, evenly spaced grooves, which means that in the case of the above-mentioned 120 mm wide board, the groove spacing on each side of the board can be 30 mm, i.e. there will be two sawcuts on one side, in addition to the both lateral edge sawcuts, while the other, opposite side will comprise three equally spaced sawcuts between the sawcuts of the opposite side.
  • grooves The purpose of the grooves is to interrupt the effect of any tensions generated in the wood structure, for which purpose it is advisable to make them extend to a considerable depth in direction of thickness of the board, approximately at least to the middle of the thickness of the board or beyond it, but not to a depth that would reduce the handling strength of the laths.
  • cut-to-size grooved boards which have been given a predetermined cross-sectional dimension by planing, are set side by side into a lay-up, in order to achieve a given dimension, such as 1800, 2000, 2200 mm, in the lay-up direction.
  • a binding sheet selected according to the final application is glued to each flat face of the lay-up.
  • the boards can be set on a glued bottom sheet constituting one of binding sheets.
  • a sheet covering the lay-up and having glue applied to its lower face is set as the other binding sheet, and the construction is made into a whole through heat-compression in order to cure the glue.
  • lay-up can be created from boards with glue on both sides, on a bottom plate, finished with a covering sheet and taken to the heat-compression.
  • the bottom sheet can comprise a veneer, plywood or coated sheet selected to be suited for the final spplication.
  • the covering sheet usually is similar to the bottom sheet, or has dissimilar properties.
  • the construction obtained can be classified as a solid wood construction, which, however, in contrast with conventional solid wood, does not have the disadvantage of stretching and contracting when the moisture content of the surrounding air varies.
  • the board is subjected to one more additional processing step.
  • this processing the board is cleaved in the in-plane direction at the middle of its thickness. This results in a construction in which the board has become a lath construction in which the laths are equally spaced, at a side-by-side distance determined by the sawcuts, from each other, and attached to the binding sheet on one side.
  • For the cleavage sawing it may be advisable to first saw the board to a smaller size, such as into parquet blanks, according to the intended application.
  • the lath construction exposed in the cleavage sawing can be covered with a facial lath lay-up or face veneer intended for a slab parquet, considering the application objectives.
  • the base structure is composed of laths produced from the board, having a uniform length and an equal spacing in the construction.
  • Figure 1 is a cross-sectional view of a board 1 which is to be used in the base structure of a parquet slab and which is manufactured from sawn timber by planing the board to desired cross-sectional dimensions.
  • the board is provided, in an appropriate work step, with grooves 3 and 3' extending longitudinally over the length of the board, by means of a circular saw, for example.
  • the grooves 3 on one side are located in alternating positions with respect to the grooves 3' on the other side and extend to the middle of the thickness of the board or somewhat beyond it.
  • the board may have an optional length in the planing and grooving step.
  • a short board is utilizable if fitted with scarf joints.
  • the planed and grooved, cut-to-size board 1 is set into a flat lay-up where the boards lie longitudinally flat and side by side. Boards are placed side by side in the lay-up direction according to the desired parquet slab length. Then, the lay-up is covered by a suitable binding sheet 2 which has glue applied thereon and which is pressed onto the lay-up, and the glue is cured. The lay-up is turned upside down, and a second binding sheet 2' is glued to the opposite side.
  • the binding sheets 2 and 2' are selected according to the intended application of the parquet being manufactured, to serve as frame sheets, for the manufacturing step of Figure 3 .
  • Figure 3 shows an operational step of the method according to the invention in which a sheet manufactured through the above-described operations (as such or cut to size) is cleaved substantially at the middle of the thickness 4 in the in-plane direction.
  • a sheet manufactured through the above-described operations as such or cut to size
  • two sheet blanks are attained having a structure comprised of regular and evenly spaced laths 1a and 1b glued to the binding sheet 2 and 2'.
  • the sawn face of the sheet blanks can then be covered by veneer or other surface material used in parquets.
  • the operational step of Figure 3 allows various modifications.
  • a more effective interruption of tension can be achieved in the laths 1a and 1b along the depth dimension of the grooves 3 and 3', by extending the grooves beyond the sawing plane 4, a groove 3a and a groove 3'b thus being formed in the lath 1a and the lath 1b, respectively.
  • the depth of the grooves 3 and 3' as well as of the grooves 3a and 3'b can be 1,5 cm and 0,5 cm, respectively.
  • different opposite groove depths and the choice of the cleaving plane 4 make it possible to obtain sheet blanks of different thickness through simple method operations, if necessary.
  • board sawn out of heartwood also can be used as the raw material of the board 1.
  • the raw material can be sawn in such a way that the grain direction of the wood is transverse to the longitudinal direction of the laths.
  • the settling direction of the annual rings is not critical either. The use of such raw material has not caused any problems in the form of humidity-related stretching and contracting in the product.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
EP07397041A 2006-11-22 2007-11-21 Verfahren zur Herstellung einer Trägerplatte für Parkett Withdrawn EP1930523A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI20061025A FI20061025A0 (fi) 2006-11-22 2006-11-22 Puulevyn runkorakenne

Publications (2)

Publication Number Publication Date
EP1930523A2 true EP1930523A2 (de) 2008-06-11
EP1930523A3 EP1930523A3 (de) 2010-03-03

Family

ID=37482480

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07397041A Withdrawn EP1930523A3 (de) 2006-11-22 2007-11-21 Verfahren zur Herstellung einer Trägerplatte für Parkett

Country Status (2)

Country Link
EP (1) EP1930523A3 (de)
FI (1) FI20061025A0 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018001266A1 (zh) * 2016-07-01 2018-01-04 镇江市阳光西尔新材料科技有限公司 一种人造板及其板芯

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105965618B (zh) * 2016-07-01 2019-01-29 孙毅 一种人造板及其板芯

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3003205A (en) * 1957-07-10 1961-10-10 Ronald G Frashour Composite bevel siding and method for its fabrication
EP0387902A2 (de) * 1989-03-17 1990-09-19 Peter Schacht Verfahren zur Herstellung von mehrlagigen Paneelbrettern bevorzugt für Fussböden

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3003205A (en) * 1957-07-10 1961-10-10 Ronald G Frashour Composite bevel siding and method for its fabrication
EP0387902A2 (de) * 1989-03-17 1990-09-19 Peter Schacht Verfahren zur Herstellung von mehrlagigen Paneelbrettern bevorzugt für Fussböden

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018001266A1 (zh) * 2016-07-01 2018-01-04 镇江市阳光西尔新材料科技有限公司 一种人造板及其板芯

Also Published As

Publication number Publication date
FI20061025A0 (fi) 2006-11-22
EP1930523A3 (de) 2010-03-03

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