CZ20031529A3 - Process for producing layered wood from boards or balks - Google Patents

Abstract

The planks or boards are first planed and covered with glue (400) and are then assembled at a second station (402). The assembly station is followed by a hand-repair station for correcting constructional errors (404). The assembly is passed through a planing station (406) followed by a further hand correction station (408).

Description

The invention relates to a method for producing laminated wood from planks or beams, in which the planks or beams are laminated to laminated wood, and the glued laminated wood is subsequently planed to achieve the desired dimension and to be repaired locally at the flaws where necessary.

BACKGROUND OF THE INVENTION

In a conventional method, for example according to DIN 1052, the workpieces (laminated wood from planks or beams) are planed in the first process step and subsequently surface errors are corrected in the second process step. In particular, the surface defects can be corrected by adequately inspecting the planed workpieces by trained personnel and, in the case of surface defects such as, for example, pitchers, knots, wraps, small tears and streaks, that is, optical defects and minor damage. in the area of these surface defects, according to the desired surface quality, they are repaired locally. Such a repair can be carried out, for example, by milling the flaws using hand tools at the flaws and applying the appropriate patches (monolayer or multilayer pitch patches, patch strips in various lengths and dimensions, natural spare knots, cross flats and similar patches). Suitable fillers such as wood filler, hot melt adhesive, PUR filler or the like can also be used.

After the patches have been applied or the fillers have cured, the repaired area by planing or

0 0 00 0

0000 00 000 000 0 0 0

0 0 000 · 0 0 0

000000 0000 0

0000 00 0000 0000

00 00 000 00 00 by machining again, which is also carried out by hand tools.

It is therefore an object of the present invention to provide a process of the kind described so that an even higher surface quality of the end product can be achieved.

SUMMARY OF THE INVENTION

According to the invention, this object is essentially accomplished by the following method steps: first inspection of the surface quality of the glued laminated wood after gluing as well as the preliminary repair of the laminated wood, planing of the pretreated laminated wood to the desired final dimension and optionally finishing the selected areas as well as finishing the finished areas.

Thus, while in the prior art, the faults are repaired, including the refinement of the repaired areas after the workpiece blanking, most of the faults are repaired prior to (last) planing of the workpieces and the repaired faults are processed in the subsequent machine planing process. The manual refinement of these corrected faults, which is labor intensive and therefore expensive, is therefore eliminated in the method according to the invention. In addition, a higher surface quality in the area of these defects can be achieved in this way than in the case of manual finishing. Also, through the process according to the invention, the throughput is increased because machine planing is performed much faster than machine finishing. Following the planing process, the final inspection is carried out according to the invention, and then manually corrected and finally only a few possible remaining minor defects are manually processed.

00 ·· 0 0 0 «« ··· • 00 000 «0 0

0 ·· 00 000 000

00 · · 000 0 0 · 00 · 0 · · ··· 00 00 00

Thus, the present invention enables the surface quality to be improved compared to the prior art while reducing the use of manual finishing and higher throughput.

In a preferred further embodiment of the invention, it is envisaged that the laminated wood is pre-planed between the sizing step and the first inspection step including pre-repair to an auxiliary dimension which is larger than the final dimension. This creates a cleaner and workable wood surface. Especially if the wood surfaces, in particular the side surfaces of the components, are very clean from the press downstream of the sizing station, this method step can also be dispensed with.

In an alternative embodiment of the invention, the first inspection step and / or the pretreatment step may be performed by machine; suitable scanners and corresponding EDV-controlled processing centers can be used for this purpose. Further advantageous features of the invention follow from the dependent claims.

Overview of pictures to shake

The invention is described and explained in more detail with reference to the accompanying drawing, in which FIG.

DETAILED DESCRIPTION OF THE INVENTION

Semi-finished products (laminated wood from planks or beams), glued and compressed at station 400, are first pre-planed at station 402 to an auxiliary dimension that is larger than the desired end dimension so that the semi-finished products have a cleaner and more easily machined surface.

At the station 404, a first visual inspection of the pre-planed blanks is then carried out by trained personnel and the manual defects are detected manually using suitable hand tools and repair materials.

·· · 00 0 • 000 00 »« 0000

9 4 4 4 4 4 4 0 • 00 000 00 00 0 λ - - · 0 · 0 · 0 000 0 0

000 4 0000 00 00 0000

00 00 00 00 00 00

Visual search and manual correction are carried out for each fault location by one and the same person. There is no need to manually correct repaired defects by grinding or planing.

The blanks thus repaired are subsequently planed at the station 406 to the desired final dimension.

Finally, the repaired and planed blanks are fed to a station 408, where visual inspection of the blanks is then carried out by trained personnel, and, for example, any defects still occurring manually are corrected using suitable hand tools and repair materials according to the required or desired surface quality. Finally, the defects corrected in this method step are manually processed by means of suitable hand tools by means of local planing or grinding of the corrected defects.

f> May 2003-452 #

Ir Φ * Ir 4 4 9 9 9 9 9 9 9 9 9 9 9 9 ^w • · 4 »

I · 4 »· 4 ·· ··

Claims (12)

PATENT CLAIMS Method for producing laminated timber from planks or beams, in which the planks or beams are laminated to laminated timber and glued laminated timber is subsequently planed to achieve the desired dimension and, if necessary, to be repaired locally at the wrong locations in order to achieve the desired surface quality. by comprising the following steps; - first inspection of surface quality of glued laminated timber after gluing and pre-repair of laminated timber, - planing of pre-treated laminated timber to the required final dimension, - final inspection of the surface quality of pre-repaired and planed laminated timber and, where necessary, the repair of selected areas, and - if necessary, the refurbishment of the prepared areas. Method according to claim 1, characterized in that the laminated wood is first pre-planed between the sizing step and the first inspection step including pre-repair to an auxiliary dimension which is larger than the end dimension. Method according to claim 1 or 2, characterized in that the repair is carried out by milling the defective spots and by applying patches corresponding to the milling spots. Method according to any one of the preceding claims, characterized in that the repair is carried out by milling the faults and introducing fillers. Method according to one of the preceding claims, characterized in that the first inspection step is carried out visually. · «9 A ♦ AAAA · · · 4 4 9 4 4 9 A A A A A A A A A A AAAA ·· AAAA · AAA AA AAAA AA AAA AAA AA Method according to one of the preceding claims, characterized in that the pretreatment step is carried out manually. Method according to one of the preceding claims, characterized in that the final inspection step is carried out visually. Method according to one of the preceding claims, characterized in that the repair step is carried out manually. Method according to any one of the preceding claims, characterized in that the finishing step comprises finishing and / or finishing. Method according to any one of the preceding claims, wherein the finishing step is carried out manually. Method according to any one of the preceding claims, characterized in that the first inspection and preliminary repair steps on the one hand and the final inspection, repair and finishing steps on the other hand are carried out by one and the same person for each fault location. Method according to any one of claims 1-4 and 7-11, characterized in that the first inspection step and / or the preliminary repair step is carried out by machine.