Double Roller Scrap Chopper Machine for Trimmed Edge Handling
After the side trimmer cuts the edge off the strip, the waste edge has to go somewhere. The scrap chopper takes the waste edge from the chute, chops it into short pieces and drops them into the waste box, which is what keeps the trimming section running without an operator handling long ribbons of scrap.
- Double roller type with left and right racks
- Upper knife shaft is the driven shaft
- Each side has its own motor, reducer and coupling
- Upper shaft drives the lower shaft through gear
Key Benefits
Why the chopper matters to the trimming line.
Scrap Handling Without Stoppage
Chopping the trimmed edge as it comes off the strip lets the trimming section run continuously.
Easier Collection And Recycling
Short chopped pieces fall into the waste box, which makes collection and recycling straightforward.
Independent Drive Per Side
Left and right upper knife shafts are driven separately, so each side handles its own edge strip.
Where It Is Used
Where it is installed.
- Slitting lines behind the side trimmer
- Pickling line trimming sections
- Cut to length lines with edge trimming
- Metallurgical processing lines producing edge scrap
Who It Is For
- Plants running side trimmers
- Line builders supplying complete trimming sections
- Maintenance teams replacing worn choppers
- Buyers upgrading scrap handling on an existing line
Problems It Solves
- Long ribbons of trimmed edge jamming the scrap path
- Manual handling of edge scrap
- Trimming section stopping because scrap cannot be cleared
- Scrap volume too bulky to collect efficiently
Technical Features
Machine arrangement.
Double Roller Construction
Two racks, left and right, each handle the shear strip from one side of the line.
Upper And Lower Knife Shafts
Each rack carries upper and lower knife shafts, with the upper shaft as the active driven shaft.
Gear Driven Lower Shaft
The upper shaft drives the lower shaft through gear, keeping both knife shafts synchronised.
Specifications
Capacity is matched to the trimmed edge width and thickness on your line.
| Type | Double roller scrap chopper |
|---|---|
| Racks | Left and right, one per edge |
| Knife Shafts | Upper and lower per rack |
| Drive | Motor, reducer and coupling per side |
| Shaft Coupling | Upper shaft drives lower shaft through gear |
| Function | Chops waste edge from the chute into the waste box |
Materials
- Welded steel rack construction
- Alloy steel knife shafts
- Hardened chopping knives
Manufacturing Process
Line Data Review
Trimmed edge width, thickness, material and line speed define the chopper size.
Rack Fabrication
Racks are welded and machined for knife shaft alignment.
Shaft And Knife Production
Knife shafts and knives are produced and hardened.
Assembly And Test
Drives are fitted and the chopper is run tested before shipment.
Quality Control
- Rack machining and shaft alignment inspection
- Knife hardness verification
- Gear mesh check between upper and lower shafts
- Drive function test
Customization Options
- Capacity for your edge width and thickness
- Drive rating to the line speed
- Chute and waste box interface
- Left and right configuration to the existing layout
Use Guide
- Keep the waste edge chute clear so the chopper is fed evenly
- Inspect knives for edge wear at planned intervals
- Check gear mesh and lubrication on the shaft drive
- Empty the waste box before it backs up into the chute
How It Compares
Against other scrap handling methods.
| Winding the edge onto a coiler | Chopping removes the need to handle and store long scrap coils. |
|---|---|
| Manual scrap handling | Continuous chopping keeps the line running and takes the operator out of the scrap path. |
| Single side choppers | Left and right racks with independent drives handle both trimmed edges at once. |
Related Products
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Wide line scrap chopper with independently driven left and right knife shafts for 2200 mm lines.
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Scrap Chopper for Metallurgical Lines
Double roller chopper handling trimmed edge scrap for collection and recycling.
View DetailsScrap Chopper for 2200 mm Slitting Lines
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Scrap Chopper Machine FAQ
What does the scrap chopper do?
It chops the waste edge coming off the trimming section and collects it, so the edge scrap goes from the chute into the waste box as short pieces.
How is it driven?
It is a double roller type with left and right racks. Each side has its own motor, reducer and coupling driving the upper knife shaft, which drives the lower shaft through gear.
Can it be fitted to an existing line?
Yes. Send your trimmed edge width and thickness, line speed and the chute layout and we match the machine.
What maintenance does it need?
Knife inspection and replacement at intervals set by your material, plus gear lubrication and drive checks.
Do you supply replacement knives?
Yes, knives and knife shafts for the machines we build are available as spares.
What do you need to quote?
Trimmed edge width and thickness, strip material, line speed and the available space at the trimming section.
Sort Out Your Edge Scrap Handling
Send your trimming section details and we come back with a scrap chopper configuration.