SK6762003A3 - Method for the manufacture of laminated wood boards or laminated wood beams - 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

Process for producing laminated wood from boards or beams

Technical field

The invention relates to a method for producing laminated wood from boards or beams, in which the boards or beams are glued multilayered to laminated wood, and the glued laminated wood is subsequently planed to achieve the desired dimension and to be repaired locally at defective points if desired.

BACKGROUND OF THE INVENTION

In a conventional method, for example according to DIN 1052, the semi-finished products (laminated wood from boards or beams) are planed in a first process step and subsequently surface errors are corrected in a second process step. In this case, the surface defects can be repaired in such a way that the planed workpieces are adequately inspected by trained personnel and, in the case of surface defects such as, for example, bumps, fallen lumps, wraps, small ruptures and overgrown cortex. areas of these surface defects locally repaired according to the desired surface quality. Such a repair can be performed, for example, by milling the faults with hand tools at the faults and applying the appropriate patches (single or multi-layer bead patches, patch strips of various lengths and dimensions, natural spare balls, cross flats and similar patches). Suitable fillers such as wood filler, hot melt adhesive, PUR filler or the like can also be used.

After applying the patches or after the fillers have hardened, it is desirable to finish the repaired areas by finishing or grinding once again to achieve a uniform surface, which is also done by hand tools.

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

SUMMARY OF THE INVENTION

According to the invention, this task is essentially accomplished by the following method steps: first checking the surface quality of the glued laminate after gluing as well as pre-repairing the laminated timber, planing the pre-repaired laminate to the desired final dimension, final quality control of the pre-repaired and planed laminated timber and optionally refining the selected areas as well as refining the finished areas.

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

Thus, the invention enables the surface quality to be improved compared to the prior art while at the same time 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 gluing step and the first inspection step including pre-repair to an auxiliary dimension that 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 adhesive station, this method step can also be omitted.

In an alternative embodiment of the invention, the first inspection step and / or the preliminary repair 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 result from the dependent claims.

BRIEF DESCRIPTION OF THE DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS The invention is described and explained in more detail with reference to the accompanying drawing, in which FIG. shows a block diagram of a method according to the invention.

DETAILED DESCRIPTION OF THE INVENTION

Semi-finished products (laminated wood from boards or beams) glued and pressed in station 400 are first pre-planted in 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.

The station 404 then undergoes a first visual inspection of the pre-planed blanks by trained personnel and manually corrects the detected defects using suitable hand tools and repair materials. Visual search and manual correction are carried out for each fault location by one and the same person. You do not need to manually finish 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 repaired 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 local manual planing or grinding of the corrected defects by means of suitable hand tools.

Claims (12)

PATENT CLAIMS Method for producing laminated wood from boards or beams, in which the boards or beams are glued multilayered to laminated wood and glued laminated wood are subsequently planed to achieve the desired dimension and, to the desired surface quality, repaired locally at defective points, if necessary, characterized by by including the following steps: - first inspection of the surface quality of the glued laminated timber after gluing and pre-repair of the laminated timber, - planing of pre-laminated wood to the required final dimension, - final inspection of the surface quality of pre-repaired and planed laminated timber and, where necessary, restoration 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-planted between the gluing step and the first inspection step including the preliminary 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 one of the preceding claims, characterized in that the repair is carried out by milling the defective spots and introducing fillers. Method according to one of the preceding claims, characterized in that the first inspection step is carried out visually. Method according to any 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 one of the preceding claims, characterized in that the first inspection and pre-repair steps on the one hand and the final inspection, repair and finishing steps on the other hand are carried out for each fault location by one and the same person. Method according to any one of claims 1 to 4 and 7 to 11, characterized in that the first inspection step and / or the preliminary repair step is carried out by machine.