Processing 240 pieces of wood, both softwood and hardwood, per minute? The HS flat finger jointing lines from Weinig promise exactly that. With an output of up to 200 pieces per minute, the horizontal single board cutters are the fastest in the world. To achieve this, short pieces of wood are fed into the machine. With the help of an automatic router, notches are cut into the sides of the wood, which can be glued together perfectly. This process also takes place entirely in the machine.
Simply put, you only have to feed short pieces of wood on one side and collect long planks on the other. However, as with most large industrial machines, HS systems also have a whole list of safety risks that must be minimized to an acceptable residual risk with the right measures. We will now look at what these are:
Whether cutting, profiling and end processing or routing, drilling and gluing - the WEINIG Group stands for pioneering solutions in the processing of solid wood and wood-based materials. For powerful and efficient machines and systems as well as innovative services or customized concepts that cover the entire production cycle from raw material to finished product. Maximum quality and cost-effectiveness give our customers and partners from trade and industry a decisive edge in global competition.
First of all, the main hazards on the machine are identified in the risk assessment. In this case, these are primarily hazards caused by shearing, crushing and cutting on the machine. To keep these hazards as low as possible, various protected areas are defined and secured with machine guards. In addition, all users of the machine are made aware of the remaining risks in the operating instructions.
The focus was on a combined safety switching device that reliably monitors three independent safety circuits and simultaneously enables safe speed monitoring.
A solution was required that would meet several requirements at the same time:
From the initial inquiry to commissioning, the collaboration was characterized by direct communication, technical expertise and genuine commitment. Even in the early project phase, we at DINA Elektronik GmbH provided support during the planning and initial tests, accompanied the commissioning on site with technical expertise and were also on hand as a reliable sparring partner during the implementation phase. This agility paid off during the project phase in particular: initial tests ran smoothly and adjustments could be implemented quickly, always with direct communication between the teams.
In addition to all these measures, however, it must also be ensured that access to the protected areas is only granted when the machine is at a standstill and there is no longer any danger, e.g. from unscrewing milling tools. WEINIG uses the DN3PS2 standstill monitor from DINA for this purpose. The standstill monitor measures the electromagnetic force when the motor stops. The potential-free output contacts (NO) switch when the value falls below the switching threshold that can be parameterized on the device. The device is parameterized simply and easily using the set button. The use of the DN3PS2 is worthwhile for WEINIG in many respects: