Kantenbeleimung/
Pressen von Holzlamellen EN
Edge glueing / pressing of timber lamellas

Clean bonding to form single-layer boards

After planing, the timber lamellas are cycled in the direction of the board press. Glue is first applied to the edge in the press before the glued lamellas are pressed together to form single-layer boards. The longitudinal layers are already trimmed to the correct width on being transferred to intermediate storage.

VerleimenVerpresse_Kantenbeleimung

Bereitstellen
von Holzlamellen EN
Provision of timber lamellas

Reliable process preparation

The timber lamellas are first destacked by a vacuum and then separated into layers. Unsuitable workpieces can be identified and ejected with the aid of quality, strength and moisture measurements. In the next step, the lamellas are trimmed on the left and right at the front and in a transverse direction before being fed to the finger jointing system with the throughfeed press. The finger jointed lamellas can then harden on the buffer section of ca. 25 m before being fed to the planing machine.

VerleimenVerpressen_Bereitstellen_Holzlamellen

Bereitstellen von
Quer-/Längslagen EN
Provision of transverse / longitudinal layers

Maximum process reliability

The provision of transverse and longitudinal layers of single-layer boards encompasses a variety of individual processes such as vacuum stacking, aligning with subsequent turning of the boards (the better side of the board should be upwards during formation of layer packages) and trimming of boards in a transverse direction with downstream cleaning and stacking. Stacking of boards creates a material buffer that enables continuous supply of the glueing station, avoids stopping times and thus ensures a high degree of process reliability.

Presskuchen
vereinzeln/schleifen EN
Separating / sanding layer packages

Constant material flow

Following pressing, individual multi-layer panels laid on top of each other are pushed again on the dry joint and fed individually to the sanding process. In the final processing step, the multi-layer panel is transformed into a prefabricated timber construction element in portal processing centres by cutting out openings and ensuring surface cosmetic treatment.

VerleimenVerpressen_PresskuchenVereinzeln

Pressen EN Pressing

Constant pressing force

In order to achieve a clean pressing pattern, a uniform pressing force must be ensured when pressing the board assemblies. The hydraulic system plays an important role in this. The Kallfass hydraulic concept is based on quasi-isobaric pressing that enables the generation of both vertical and transverse pressure. Pressure control ensures a constant pressing force of 1N/mm² over the entire board surface, even where a maximum board width of 3.6 m is involved.

VerleimenVerpressen_Pressen

Presskuchen bilden EN Creating layer packages

Optimum process utilisation

When creating layer packages, individual layers of single-layer boards are glued in a cross pattern to achieve a high degree of dimensional stability. Glue is applied uniformly over the entire board surface using a glueing portal. Following every glue application, a vacuum portal crane lays the next (alternating transverse or longitudinal) layer precisely, edge to edge on the glued board. The board structure of a layer package should have at least 3 layers and can be a maximum of 600 mm thick. In the case of a thin layer structure, several board assemblies can also be laid on top of each other with a dry joint in each case and, simultaneously, pressed to achieve better process utilisation.

VerleimenVerpressen_PresskuchenBilden