Compact coil feeding line for sheet metal thickness from 0.6mm to 6.0mm
A compact coil feeding line is not only a simple combination of uncoiler, straightener, and feeder parts but also highly integrated control in operations. The hydraulic station, coil car, uncoiling motor, spindle, and inverter, straightener part, servo feeder motor are connected with the PLC modular system and controlled by one touch screen, which is quite convenient for operators and has high safety insurance.
Material Type: High Strength Steel, Cold-Rolled Steel, Hot-Rolled Steel, Galvanized Steel, Stainless Steel, Copper, Aluminum, etc.
Yield Strength: ≤430 N/mm2
Tensile Strength: ≤686 N/mm2
Material Thickness: 0.6 mm - 6.0 mm
Feed Line Structure
Compact Coil Feeding Line GLK
Stamping Press 200-2500ton
Feed Line Speed
0-20m per minute
Automatic and safety operation
The short line combines decoiler, straightener, and feeder parts into one system. This line structure is easy to install and operate, can enter into mass production in a short time.
With coil threading support device, the metal coil can be inserted into the straightening part smoothly then starts the automatic coil feeding process. Operators can manage the coil loading, uncoiling, straightening, and feeding process by a single touch screen control panel.
HE compact line has a meager failure rate and convenient to maintenance.
With international brand electronic control system and self-inspection procedures, the operation has high safety insurance, which is suitable for modern production needs.
More and more press workshop are replacing loop line with the compact coil feed line, to meet the higher safety standards.
Space-saving line structure
In a conventional loop-type coil feed line, the length of a whole system may be 10 meters or more. Compact type line reduces the workspace into 5 meters, which will save lots workspaces. And for some thin material coil feeding, the length of the feed line can be 3.2m.
Precision straightening performance
The compact system can synchronize decoiler straightener and feeder part, with control of the PLC closed-loop system, which ensures a high servo feed accuracy.
With high-quality straightening rollers, back up rollers, and worm gear straightening adjusting, it’s capable of managing a wide range of metal coil processing applications. Compact coil feeding line is necessary for the high strength steel stamping in automotive, construction, aerospace or electrical appliance manufacturing.
Main Parts & Description (GLK4-600 as reference)
1. Coil Car
Coil car helps a metal coil load to the uncoiler spindle. It has a wear-resisting surface and four baffle arms to prevent coil tilting. A hydraulic cylinder drives the coil lifting with pressure maintaining valve for smoothly going up. And the horizontal movement is driven by a hydraulic motor, with throttle valve for speed control. Moveable control handle or touch screen panel controls the coil car operation. Limit switch and the limit device will prevent the offside. The centering of coil loading needs visual alignment, with scales on the machine body for reference.
A spindle is a critical component for an uncoiler/coil reel structure, and HE uncoiler spindle has excellent load-bearing performance and with fatigue resistance. Unlike the conventional band brake, the mandrel brake of the compact system is pneumatic disc brake, which allows for more precise braking.
The decoiler mandrel motor is AC motor with frequency converter. A variable frequency motor, with double row and large pitch chain, drives the decoiler transmission.
Coil pressing arm equips a polyurethane rubber wheel, to add pressure on the coil to avoid strip lose during uncoiling process. It can be open or closed by an air cylinder drive and touch screen control.
Coil guide limit has two non-motorized rollers with free rotation. The inside roller has a fixed angle. The outside roller can be closed by air cylinder after the coil loaded on decoiler mandrel. Then the distance between the two rollers can be adjusted according to the specific coil width.
3.Coil threading support
A coil threading support device can help the strip sent into the straightener part smoothly.It has a swing arm and two coil inlet rollers. An air cylinder drives the swingarm, and the touch screen console controls the operation.Upper roller equipped on the swingarm, bottom roller shares power with straightener part.The two rollers are special sandblasting treatment, which can clamp the metal strip tightly without damage on the steel strip surface.
4. Straightener Feeder
The straightener-feeder part of this short line has 7pcs of straightening rollers, 2pcs of feeder rollers, and two groups of back-up rollers.
Gcr15 high carbon chromium bearing steel make all the rollers, with hard chrome grinding surface treatment, the hardness can reach HRC60±2. HE implements 100% inspection before assembly, to ensure radial runout of all the rollers is under 0.01mm.
Straightening rollers: 7pcs (up4/down3), supported by deep groove ball bearings
Straightener rollers are transmitted by side gear drive, with ISO 6 precision standard gears, and released by air cylinder.
The standard version has handwheel adjustment of straightening rollers; electric adjustment is for option.
Backup rollers: 2 groups, supported by Needle bearings
Pinch rollers: 2pcs
Straightening Capacity GLK4-600 for reference
Yield Strength (N/mm2)
Tensile Strength (N/mm2)
Testing Pressure (kgf/mm2)
Material Thickness (mm)
5. Hydraulic Shear (Option)
An electric hydraulic trim shearing machine can help to cut the coil edge trim, heads, tails.It has four sides scissors to achieve smooth cutting. Moreover, when the material crack in the stamping dies, it can cut the strip loop for a quick repair and maintain.
6. Automatic Lubrication Unit (Option)
Lubrication of steel strip before stamping will protect the stamping dies. HE lubrication device is automatically controlled, with an oil loop recycling system, it will save oiling cost and prevent leakage.You can choose wool felt roller or rubber roller according to different material type.
7. Coil Outlet Support Bracket
An outlet support bracket will help the metal strip delivery to press die smoothly. When there is lots of space between straightener-feeder and stamping dies, the strip will move up and down. An outlet support bracket can avoid this problem. And the length of the support bracket is adjustable to fit different dimensions of stamping dies.