Perfect box-type windows with the right tools

The new Schaden window renovation production facility has been in operation for a few months. In addition to high-quality machinery, managing director Christoph Schaden attaches particular importance to a perfect tool quality. He found what he was looking for at Leitz Riedau.

Schaden window renovation from Jagerberg in Styria specializes above all in the restoration of historical box-type windows. “The requests to make matching new windows for the restored windows have steadily increased. That’s why we decided in 2019 to invest in a new production hall including all machines”, explains managing director Christoph Schaden. For planning and construction, he relies on the expertise of Michael Eckhart, managing director of Solarwood in Vienna. Eckhart accompanied the project at Schaden from the planning stage including the technical equipment, through construction to commissioning.  The solid wood processing machines come from the Weinig Group. These are equipped throughout with tools from the specialist Leitz.

“The complex specifications on the part of Schaden window renovation were an enormous incentive for our window experts in the design office,” recalls Gerhard Groß, technical salesman at Leitz, and continues: “A box-type window consists of up to 70 parts: the complete frame, the inner and outer levels and the intermediate box, in variable wood thicknesses and with variable rebate dimensions and profiled transom/set timber – to name just a few. All this has to be covered by efficient tool planning. Added to this is the complete sash production. Here, Schaden relies on our proven Leitz Plugtec corner joint for the sash.”

Plugtec is a special tenon joint that is not visible on the face. “This is very important for our high quality. In addition, the window is inherently more stable”, explains Schaden. “Due to the production on CNC machines without dowels, the production is efficient as well as cost-effective and the application is flexible”, adds Groß. The Plugtec connection was – in addition to the good tool quality – one of the reasons why Schaden chose Leitz. Another benefit is the Climatrend style (CTS)-system from Leitz. Wood and wood-aluminium windows can be produced with this tested system.

Special tool for the best possible finish quality
When cutting the profiles, the Profilcut Q tools are used, which have Leitz’s special ripple technology in the cross-machining. This cuts the annual rings to minimize or eliminate cutting pressure or tear-outs. At the same time, the corrugation ensures a larger gluing surface and thus less adhesive leakage.

Leitz supplied Schaden profile tool sets as well as various router cutters and boring bits. “In addition, our window experts created over 200 sequence drawings for each cutter profile, which are needed as a basis for programming the CNC system,” reports Groß. 75 window sections, tool changer assignment plans, tool drawings and corresponding cutter documentation round off the Leitz delivery. In addition, the Austrian specialist is responsible for the service, i.e. the sharpening of the tools. Groß and Schaden agree that the commissioning and the production period, which has now lasted one year, went off without a hitch.


(Photos: Martina Nöstler, Holzkurier)

Windows & front doors

User report Holzkurier 34/2021 - Perfect box-type windows with the right tools