Product Description

What is "Plain Strut Channel"?

• Material: Carbon steel.

• Finish: "Plain" means it has no protective coating. It is raw, mill-finish steel.

• Appearance: It has a dark, grayish, slightly rough surface that will rust quickly when exposed to moisture.

• Common Use Cases:

  • Indoor, dry environments where corrosion is not a concern.

  • Projects where the channel will be painted or powder-coated to match a specific color scheme (e.g., in architectural applications). The plain surface is ideal for paint adhesion.

• Advantage: It is typically the least expensive option.

• Disadvantage: No inherent corrosion resistance.

What is "Unistrut Slotted Channel"?

• Brand: Unistrut is a trademarked brand by Atkore International. It was one of the original inventors of this type of metal framing and remains the industry leader.

• Design: The "Slotted Channel" design is characterized by its unique, precisely punched slotted holes (not just round holes). This allows for the famous infinite adjustability with spring nuts.

• Availability in Finishes: Crucially, Unistrut channel is NOT just "plain." It is available in several finishes, including:

  • Galvanized: The most common finish. Coated with a layer of zinc for excellent corrosion resistance. This is the default for most electrical and mechanical applications.

  • Plain (Uncoated): Yes, Unistrut also sells a plain, uncoated channel for the use cases mentioned above.

  • Stainless Steel: For highly corrosive environments (food processing, chemical plants).

  • Aluminum: For lightweight applications or specific corrosive environments.

  • Painted: Pre-finished in various colors.

Key Differences at a Glance

How to make plain strut channel and slotted channel

Working line flow

Decoiler(automatic or manual)-----feeding&levelling------main roll forming----fly punching&cutting------Passive out table

1.Uncoiler / Payoff: Holds the massive coil of sheet steel (galvanized, plain, or aluminum) and feeds it into the line.

2.Roll Forming Machine:

This is the heart of the line. It consists of multiple stands (or stations), total 18 rollers stations, drives by Gearbox

Each stand of rollers makes a small, incremental bend in the metal.

Station 1 might start the edges upward. Station 2 bends them further, and so on, until the final station produces the perfect 90-degree flanges of the finished strut channel.

This gradual process prevents metal fatigue and ensures a consistent, high-quality profile.

3. Fly-Punching (The Slots)

Process: A servo-driven punching  uses a custom-made die set to punch the characteristic slotted hole pattern into the flat steel strip. Because it's a "flying" press, this happens at full line speed 
Modern servo systems ensure the slot pattern is perfectly spaced and aligned, which is critical for the channel nuts to function correctly.

4. Fly-Cutting (The Length)

Process: A heavy-duty hydraulic shear is mounted on a moving carriage. This carriage accelerates, matches the speed of the moving channel, makes a clean, burr-free cut to the desired length (e.g., 10 ft or 20 ft), and then returns to its start position.

Advantages:Square, Clean Cuts: The cut is made while the material is fully supported and moving steadily, preventing deformation or ragged edges.

How to install the machine

We can send our engineer to help you to install the machine

Step1: Mechanical Assembly & Positioning

We will use precision levels and laser alignment tools to position the machine on the foundation according to the specified tolerances.

Key components to be assembled include:

Uncoiler/Decoiler

Feeding & Straightening Unit

Fly-Punching Station

Roll Forming Mill (with all stands)

Fly-Cutting Station

Run-Out Table & Stacker

Step 2: Electrical & Control System Integration
Your engineer will lead the connection of the main electrical cabinet, motor drives, sensors, and the operator control panel.

They will be responsible for the critical task of establishing communication between the PLC (Programmable Logic Controller) and all peripheral devices.

Step 3: Tooling Installation & Alignment (Critical Step)

Our engineer will oversee the installation of the punching dies and forming roll sets.

This is a precision task requiring expert knowledge to ensure the slots are punched correctly and the channel is formed to the exact required dimensions and tolerances.

Step 4: Commissioning & Test Run

Power-Up: our engineer will perform the initial power-up and system checks.

Parameter Setting: They will input the necessary production parameters for a specific strut channel profile (e.g., P1000, 12 gauge).

First Article Production: We will run the first batch of material. Your engineer will measure the finished strut channel to ensure it meets all dimensional and quality standards (slot alignment, length accuracy, etc.).

Fine-Tuning: Any necessary adjustments to the feeding, punching, forming, or cutting will be made.

Step 5: Training & Handover (Extremely Important)

Your engineer will conduct formal training for our production and maintenance staff. This should cover:

Daily Operation: How to start, run, and shut down the machine.

Tooling Changeover: The procedure for changing rolls and punches to produce a different channel profile.

Basic Troubleshooting: How to diagnose and resolve common issues like mis-feeds, punching problems, or shape defects.

Preventive Maintenance: A basic maintenance schedule for lubrication, inspection, and wear-part replacement.