Green Line

Conveyors for handling and sorting round timber:

Conveyors designed for the transport of both short and long round timber. Efficient timber feeding into sawmills. Complete sorting lines for round timber. Robust construction. Long service life.

M-TEC has a long-standing partnership with leading suppliers of sawmill machinery across the EU. Its conveyors facilitate the handling of round timber and ensure a smooth supply of logs for debarkers, band saws, frame saws, or aggregate technologies. The company delivers complete round timber sorting lines, including root reducer cutters, conveyors for metal detectors, and measurement systems that enable dimensional sorting of logs.

The conveyors and equipment are characterized by their robustness, impact resistance, and long lifespan. High-quality construction ensures the smooth operation of the lines, even under challenging environmental conditions they face during use.

The Green Line product range is specifically designed for primary wood processors, including log yard mechanization and timber feeding systems for sawmills.

Log Entry | 3 m

Brief Description

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Conveyors

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Technical Specifications

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Reference

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Log Entry Bučina | 3 - 5 m

Brief Description

**Log Entry System**

The log entry system is a mechanized solution for separating, debarking, and feeding logs into a band saw. Logs are loaded onto the roll conveyor in piles using a loader. This conveyor transports the unsorted logs to the inclined conveyor, which is designed to pre-separate the logs and elevate them to the required height. Its functionality is based on the precise angle of the conveyor and pyramid-shaped carriers on the chains.

To handle the wide range of log diameters, an additional disc separator is incorporated. This separator works on the principle of small and large cams, ensuring that only one log is released at a time onto the feed conveyor. The feed conveyor then transports the logs longitudinally using carriers attached to a pair of roller chains.

At the end of the process, hydraulically controlled centering rollers ensure the correct positioning of the logs as they enter the debarker. After the debarker, a special belt conveyor, free of any metallic components in the metal detector area, handles the logs for metal detection.

Next, a feed conveyor with bidirectional ejectors removes defective logs to a discharge box on one side, while directing the usable logs to a cross-elevating conveyor for further processing. The elevating conveyor lifts the logs using carriers to the feed conveyor with carriers, which pushes the logs into the optimization cutting line (supplied by the customer for this project).

After optimization, the feed conveyor ejects the optimized logs onto an elevating conveyor. This elevating conveyor then transports the logs to a stacker. Additionally, the elevating conveyor serves as an operational buffer, minimizing downtime for the sawmill.

Conveyors

1. Roll Conveyor (Item 1000)
2. Inclined Conveyor (Item 1010)
3. Disc Separator (Item 1020)
4. Feed Conveyor with Centering (Item 1030)
5. Debarker
6. Conveyor for Metal Detector (Item 1050)
7. Conveyor with Bidirectional Ejectors (Item 1060)
8. Cross-Elevating Conveyor (Item 1065)
9. Feed Conveyor (Item 1070)
10. Optimization Cutting Line
11. Feed Conveyor with Ejectors (Item 1090)
12. Cross-Elevating Conveyor (Item 1095)

Technical Specifications

Total Motor Power [kW]: 87
Log Length [m]: 2.5-6
Log Diameter [mm]: 300-1100 (average 380)
Wood Type: Beech
Capacity [pcs/hour]: 100
Total Weight [kg]: 105,000

Reference

Kronospan s.r.o.

Log entry | 3 - 5 m

Brief Description

The log entry system is a set of mechanisms designed for the separation and feeding of logs into the sawmill. Logs are loaded onto the roll conveyor in piles using a loader. This conveyor transports unsorted logs to the cascade system, whose purpose is to separate the logs. The functionality is based on the cascade construction and shaped cut-outs. Through the movement of these shaped cut-outs, the logs are separated and elevated step by step until they reach the root reducer.

In the reducer, any root flares on the logs are removed if required for further processing. After the reducer, the logs are transported to a Hook Conveyor, which also serves as an operational buffer for the logs. The last hook ejects the logs onto a longitudinal feed conveyor using carriers attached to a pair of roller chains. To ensure correct positioning of the logs, a side stop is installed on the conveyor. The logs are then transported further along another feed conveyor into the debarker.

Conveyors

CONVEYORS:

1. Roll Conveyor (Item 100)
2. Cascade System (Item 110)
3. Reducer (Item 130)
4. Hook Conveyor (Item 140)
5. Longitudinal Feed Conveyor with Stop (Item 30, 35)
6. Longitudinal Feed Conveyor (Item 40)

Technical Specifications

Total Motor Power [kW]: 164
Log Length [m]: 2.4 – 5.2
Log Diameter [mm]: 150 – 600
Wood Type: Spruce, Pine
Total Weight [kg]: 74,000

Reference

Rettenmeier Tatra Timber s.r.o.

Log entry | 3 - 6 m

Brief Description

The log entry system is a set of mechanisms designed for separating and feeding logs into a band saw. Logs are loaded onto the roll conveyor in piles using a loader. This conveyor transports unsorted logs to the cascade system, whose purpose is to separate the logs. The functionality relies on a pair of cascading cut-outs, where one is stationary and the other movable. Through the synchronous movement of these cut-outs, the logs are separated and elevated step by step until they reach the feed conveyor.

On this conveyor, the logs are transported longitudinally using carriers attached to a pair of roller chains. If a log is positioned with the root flare facing forward, it is lifted above the chain by the turner, rotated 180° so the narrower end faces forward, and then placed back onto the carriers. The log is then transported until it reaches the correct position, where a sensor triggers an impulse to eject the log onto the cross-elevating conveyor.

With the help of carriers, the log is transported to the stacker. This conveyor also serves as an operational buffer for the logs. In the stacker, the logs wait until an empty saw carriage moves in front of the stacker, and the logs are ejected into it using a hydraulic ejector.

Conveyors

1. Roll Conveyor (Item 10)
2. Cascade System (Item 20)
3. Longitudinal Feed Conveyor (Item 30)
4. Log Turner (Item 45)
5. Longitudinal Feed Conveyor with Ejector (Item 40)
6. Cross-Elevating Conveyor (Item 50)
7. Log Stacker (Item 60)

Technical Specifications

Total Motor Power [kW]: 80
Log Length [m]: 4-6.3
Log Diameter [mm]: 240-400 (MAX 700)
Wood Type: Spruce, Pine
Total Weight [kg]: 37,200

Reference

DCP timber s.r.o.

Log Entry | 3 - 21m

Brief Description

The log entry system is a mechanized setup designed for the separation and feeding of logs into a band saw. Logs are loaded onto the roll conveyor in piles using a loader. This conveyor transports unsorted logs to an elevating conveyor with carriers, which lifts the logs to a cam separator. On this conveyor, the logs are separated and then transported to a feed conveyor leading to the debarker. After debarking, the logs are transported to a position where they are shifted onto a cross conveyor using side ejectors.

The cross conveyor, equipped with carriers, moves the logs to a hook shifter, which also acts as an operational buffer for the logs. From the hook shifter, logs are transported to a feed conveyor, which moves them to a trimming saw for cutting. The trimmed logs are then moved along the feed conveyor, where they are either redirected into a discharge box or stopped by an extendable stop and ejected into a hook stopper. The hook stopper, equipped with a pair of shaped cut-outs, transfers the logs onto the feed conveyor leading to the metal detector. After passing through the metal detector, the logs are transported for further processing into the sawmill.

In a secondary branch, shorter logs (up to 6m) are processed. From chain tracks, log piles are separated on a cascade system. The separation mechanism consists of a pair of cascading cut-outs, where one is stationary and the other is movable. Through the synchronized movement of these cut-outs, the logs are separated and elevated step by step until they reach a feed conveyor. This conveyor transports the logs longitudinally using carriers attached to a pair of roller chains into the metal detector. After detection, the logs are transported for further processing into the sawmill.

Conveyors

CONVEYORS:

1. Roll Conveyor (Item 10)
2. Elevating Conveyor (Item 20)
3. Cam Separator (Item 30)
4. Feed Conveyor (Item 90)
5. Feed Conveyor with Ejector (Item 100)
6. Cross Conveyor with Hook Shifter (Item 170)
7. Feed Conveyor with Ejector (Item 150)
8. Hook Stopper (Item 140)

CONVEYORS:

1. Cascade System (Item 20)
2. Feed Conveyor (Item 130)
3. Conveyor for Metal Detector (Item 260)

Technical Specifications

Total Motor Power [kW]: 110
Log Length Branch 1 [m]: 3 – 22
Log Length Branch 2 [m]: 3 – 6
Log Diameter [mm] MAX: 450
Wood Type: Spruce, Pine
Total Weight [kg]: 109,000

Reference

Pauls timber