Name: TG-RollCrush 300 Double Roll Crusher
Brand: 天工

Precise Top-Size Control with Minimal Fines Generation

The TG-RollCrush 300 is a double roll crusher for metal recycling applications that require precise control over output fragment size with minimal fines. Two counter-rotating rolls with toothed segment surfaces draw material into the crushing gap, where it is reduced by a combination of compression and shear. The toothed profile grips individual pieces rather than relying on gravity or impact, making it effective for brittle castings, metal chips, and pre-sized fragments that need a controlled final sizing pass.

The roll gap directly determines maximum output fragment size-no material larger than the gap can pass through. This gives a hard upper bound on output size, unlike impact or jaw crushers where output size is probabilistic.

Specifications

Parameter	Value
Crushing Mechanism	Compression and shear
Roll Configuration	Twin counter-rotating, independent drive
Roll Surface	Segmented toothed, bolted
Gap Adjustment	Hydraulic with spring relief
Tramp Protection	Spring-relief auto-separation
Drive	Independent motor per roll via gearbox
Motor Frequency	50 Hz or 60 Hz configurable
Throughput Capacity	Varies by material density and gap setting - confirm at inquiry

Why Double Roll Crushing for Metal Recycling

Minimal fines: Compression and shear between rolls produce fewer fines than impact crushing-important when fines reduce downstream separation efficiency or lower recovered metal value.
Precise top-size control: The roll gap sets the maximum output fragment size. No material larger than the gap can pass through.
Low dust and noise: Slow-speed compression generates less dust and noise than high-speed impact crushers, relevant for facilities under strict environmental regulations.
Ductile contaminant handling: Ductile metals entering the gap (copper wire, thin aluminum) tend to flatten rather than fragment. This can be an advantage if the goal is to flatten ductile contaminants for downstream screening separation.

Roll Segment Design

The roll surface carries bolted toothed segments in hardened alloy steel. Tooth profile is selected based on feed material:

Coarse tooth: Larger teeth, wider spacing. For larger feed pieces and higher throughput.
Medium tooth: General-purpose for most metal recycling applications.
Fine tooth: Smaller teeth, closer spacing. For finer output sizing and smaller feed particles.

Segments are bolted to the roll core and individually replaceable. Roll cores remain in the machine-only toothed segments are swapped. Track wear by measuring tooth height at scheduled intervals.

Application Scope

Final sizing of pre-crushed cast iron fragments before foundry charging
Sizing of metal chips and turnings for briquetting feed
Reduction of brittle aluminum castings to uniform particle size
Preparation of steel scrap fragments for direct furnace charging
Controlled sizing of pre-shredded material before eddy-current separation

Optimized for brittle, pre-sized material. Not a primary crusher-feed should be pre-sized by a jaw crusher, impact crusher, or shredder. Feeding oversized or ductile material can stall the rolls or cause excessive wear. Confirm maximum feed piece size at inquiry.

Drive and Control

Each roll is driven by an independent motor via gearbox, allowing the rolls to run at slightly different speeds to improve material pull-through. The PLC monitors motor load and reverses roll rotation on overload to clear jams. Soft-start is standard.

Wear Parts and Support

Spare toothed segments in coarse, medium, and fine profiles are available as individual replacements. Our engineering team can configure tooth profiles and gap settings to match specific feed material characteristics. Each machine ships with a spare-parts kit; standard lead time for replacement wear parts is under 45 days. Installation supervision, operator training, and a 12-month warranty are included.

Frequently Asked Questions

What determines the output particle size?

The roll gap directly sets the maximum output fragment size-no material larger than the gap can pass through. The hydraulic adjustment system allows the operator to change the gap to match downstream requirements. The tooth profile (coarse, medium, fine) also affects minimum output size and throughput rate.

How does the double roll crusher compare to an impact crusher for sizing?

The roll crusher produces fewer fines and gives a hard upper-size limit, but cannot achieve the same reduction ratio in a single pass. The impact crusher produces more uniform sizing and better liberation but generates more fines. Choose the roll crusher when fines reduction and top-size control are priorities; choose the impact crusher when liberation and reduction ratio matter more.

Can the machine handle ductile metals?

Ductile metals like copper wire and thin aluminum tend to flatten rather than fragment under roll compression. This can be useful if you want to flatten ductile contaminants for screening separation, but it means the roll crusher is not the right choice if your goal is to fragment ductile materials. For mixed streams, discuss optimal stage positioning with our engineering team.

What happens if uncrushable material enters the gap?

The spring-relief mechanism allows the rolls to separate momentarily, letting the uncrushable object pass through without damaging roll segments or shafts. The rolls then return to the pre-set gap automatically. The PLC also monitors motor load and can reverse the rolls to clear a jam.

Request a Detailed Proposal

To prepare an accurate quotation, include your typical feed material types and maximum feed piece size, target output fragment size, required throughput, site power supply (voltage and frequency, 50 Hz or 60 Hz), and whether the roll crusher follows a jaw crusher, impact crusher, or shredder in your line. Mention your preferred tooth profile (coarse, medium, fine) if known.

Request product details