Logyards for the OSB industry

The OSB production is a very complex process with a continuous integration of all machines and systems - from log handling to the board stacking. If one component breaks down, usually the complete production stops. Especially here a reliable technique is needed from specialists that really understand what matters. HOLTEC demonstrates its knowledge in log handling in more than 20 debarker and flaker lines for the OSB production: rugged conveying systems, complete engineering from the steel construction to the safety concept - passion in every detail. That makes the difference! Here is not the simple connection of machine components important. Only when all system components are perfectly attuned to each other the availability of the complete plant is provided.

We design your logyard individually to your needs. We integrate all flaker machines of the leading suppliers (PALLMANN, Carmanah, Fuji King) to a useful total concept - in frost regions including conditioning systems with the necessary heating technology. For the flaker infeed crane / excavator solutions or the proven pocket loader system can be operated. Challenge us. Nine of ten European OSB mills trust already today in HOLTEC technology for new systems or modification works.

We proudly state: HOLTEC - No. 1 in OSB!

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Feeding systems

Feeding systems

Reliable from the beginning: The efficient feeding of debarkers is a central element in the row of linked machines. The system capacity is decisively affected already at that point.

With the step feeder technology HOLTEC set a benchmark in the industry sector. Combined with a robust and heavy infeed deck this unit is used for capacities up to 100 t (b.d.) / h. Infeeds naturally have to bear the highest mechanical loads. Heavy chains with an extremely high life time ensure our customers that the “total lifetime costs”, i.e. the costs for the total operating time, are reduced to a minimum.

Debarkers

Debarker „variobarkerTM“ - HOLTEC

  • Robust and solide Design. Driven by hydraulic Motors instead of chain drives.
  • Improved debarking result by adapted tool geometry and tool arrangement at the rotor.
  • Vario tilting function: Adaptation of the machine's inclination based on the different surroundingconditions (required capacity, log condition in Terms of temperature, humidity, etc.) This results in an active control as well as influence on the debarking result.
  • Modular design for different production ranges.
  • Different tools are possible, with active toothing – especially for the freezing periods.
  • High degree of pre-installation – Reduces efforts at the construction site, reduces foundation works.
  • Professional hydraulic piping, cleaned, checked and preinstalled as far as possbible in the factory
Conveying systems

Conveying systems

Logyards in the wood based panel industry are often complex systems with a lot of linked machines and conveying systems. High feed capacity associated with highest standards of the availability are the basic conditions for the development of all conveying systems. We are familiar with log handling and benefit from nearly 50 years of know-how. We set new standards with our product range solid-plus for more than 15 years. Very tear resistant chains, special wear resistant steel and the necessary sophistication in the details characterise our conveying systems.

Waste handling systems

Waste handling systems

Seems to be marginal and is often disregarded. Adapted to the application a suitably dimensioned waste handling is self-profitable. HOLTEC provides solutions from the scraper conveyor via the waste conveyor in chain execution to the conveyor band with metal detection. As core product to 100% from one source and designed as well as improved with a long-standing know-how.

Log conditioning

Log conditioning

A high chip quality is the basic condition for producing a premium final product with the guaranteed features. To be able to produce strands in a consistent good quality even in cold regions (especially North America and Russia), the logs need to be conditioned before being brought to the flaker. This means, in the freezing period the logs need to be thawed. Such a process leads to a low amount of fines and the lifetime of the flaker tools can be increased significantly.

HOLTEC offers different technologies:

- Logponds

The logs are conveyed continuously through a huge concrete basin filled with hot water. By means of chain conveyors the logs are kept below the water surface. Standardly the logs are unloaded by electrically operated material handling machines. In the basin there are laterally arranged recesses where radiators are installed for heating up the water.

- Engineering by Canadian specialists
- Conveying chains in North American design
- System lengths up to 70 m
- Log lengths 3 - 6 m
- Capacities 20 - 100 t/h
- Supply incl. complete heating technology possible

References:

- HOLTEC De-Icing-System „smart-con“

With this technology developed by HOLTEC, the working principle of the logponds is “upended”. The logs lie onto a chain conveyor. By means of this conveyor they are transported through a continuous water curtain. The waste water is gathered at a central position, automatically cleaned and heated up again.

Advantages of this technology:

- Automatic water cleaning, i.e. no settling of dirt and mud in the basin
- Constant temperature distribution in the total cross-section
- Free access in case of damage
- High water temperatures of >70°C possible
- Very low amount of water in the circuit
- System lengths up to 70 m
- Log lengths 3 - 6 m
- Capacities 20 - 100 t/h
- Supply incl. complete heating technology possible

 

 

References:

Handling machines

Handling machines

Certain system concepts require the integration of a material handling machine into the process. Electrically operated machines with low energy consumption as well as a long life time are possible. Optionally the machines can be integrated as stationary system (pylon, if necessary with elastic support) or as moveable one on a rail system.

For many years we maintain a trustful collaboration with SENNEBOGEN as a premium supplier for material handling machines.Opens external link in new window www.sennebogen.de

Flakers

Flakers

Especially in the field of ring stranding systems for the OSB industry HOLTEC is cooperating with KADANT for many years now. The cooperation between both companies is a close and long-term one. Many systems in Europe have been successfully finished during the past years. The KADANT strander division (formerly Carmanah) is outstanding in supplying systems for this kind of application with an experience of more than 100 years now. 

Description:

The SmartRING Strander produces high-quality and consistent strands and is designed for easy adjustment of strand parameters. Maintenance is straightforward, and wear components are easily replaced to ensure downtime is minimized. Additionally, several features in the SmartRING platform, monitor knife installation
and subsequently identify issues, and, if necessary, act to minimize the potential of serious machine damage or catastrophic failure.

Customer benefits:

- Consistent strand quality through real-time adjustment to forward ring velocity
- Wear components quickly and easily replaced as required
- Knife change procedure automated through nutrunner system
- Option to utilize disposable knives
- Safety features minimize the potential of serious machine failure

Technical features:

- Real-time ring RPM monitor to adjust forward ring velocity during cutting cycle
- Automated nutrunner system ensures knives adequately clamped prior to operating
- Dimensions related to and affecting cutting properties not affected by wearing  
  surfaces due to design of facegear components
- Ring design to allow complete replacement in 10-hour period
- Designed to accommodate plate or disposable knives

Control and switch systems

Control and switch systems

Today systems in the wood industry are complex high-tech machines. With customer-oriented solutions HOLTEC provides the corresponding automation. From the switch cabinet construction to the process programming we produce the complete value chain in our own company and therefore, we have under control 100% of what our customers receive. Innovative programming with TIA Portal and Siemens S7-1500 are self-evident to us.

Development of customer-specific hardware and software
Production of electrical components and switch cabinet construction
Installation and cabling of the delivered systems
• Start-up at site