Combi Chip Spreader

VCCS Combi Chip Spreader

A combi chip spreader (also called a synchronous chip sealer or combined chip sealer) sprays hot bitumen and spreads aggregate chips on the road in the same pass. The chips fall onto the binder seconds after it is sprayed, while it is still hot, so they bond better than with a separate distributor and chip spreader.

The Vimpo VCCS-2400 is built on the customer's truck. It carries a 7,000 L insulated bitumen tank and a 9 m³ chip hopper on a 10-wheel (6×4) truck, or 9,000 L and 11 m³ on an 8×4 truck. A 30 m³/h bitumen pump driven from the truck PTO sends the binder to a heated spray bar 2400 mm wide, 3600 mm with the folding sections open. The rate is set from the cab between 0.5 and 2.5 L/m². Six models combine proportional (A) or manual (M) control with a thermal oil boiler (T) and a sliding chip hopper (S).

How Does a Combi Chip Spreader Work?

Heating

Diesel burners heat the bitumen through U-shaped flame tubes along the tank, to 160 °C or more. The burner stops by itself when the set temperature is reached. An inverter of at least 1000 W supplies the burners. On AT and ATS models a thermal oil boiler of at least 50,000 kcal also heats the pump jackets and the spray bar.

Spraying

A hydraulic motor drives the bitumen pump (at least 30 m³/h at 950 rpm); the truck PTO drives the hydraulic pump. The bitumen goes into the spray bar from both ends, so the pressure is the same at every nozzle. The nozzles are 100 mm apart, and each group of six nozzles is switched from the cab. A radar measures the driving speed; on A models the computer keeps the set rate as the speed changes.

Chip Spreading

The chip hopper is not a tipper: its floor is inclined, and the chips run down to the spreader. A rubber-coated drum, driven by a hydraulic motor, lays the chips evenly in four widths. A sieve under the hopper takes out the dust, and pneumatic pistons empty the dust chamber. On S models the hopper moves 150 mm to each side.

VCCS-2400 Models

All models have the same tank, pump, spray bar and hopper. The letters show the options: A = proportional control, the rate follows the driving speed; M = manual control; T = thermal oil boiler for the jackets and the spray bar; S = hydraulic sliding chip hopper, ±150 mm.

• VCCS-2400A: proportional control
• VCCS-2400AS: proportional control, sliding hopper
• VCCS-2400AT: proportional control, thermal oil boiler
• VCCS-2400ATS: proportional control, thermal oil boiler, sliding hopper
• VCCS-2400M: manual control
• VCCS-2400MS: manual control, sliding hopper

VCCS Combi Chip Spreader Features

Insulated Bitumen Tank

The tank is elliptical or cylindrical, with a 4 mm shell and 5 mm heads. A baffle stops surges. It is insulated with 50 mm rock wool and cladded with aluminium: 1 mm on the sides, 2 mm at the front and rear. A manhole with an anti-slip platform, a 3" vent and a drain valve are on the tank.

Heated Spray Bar

The centre bar is 2400 mm; pneumatic folding sections open it to 3600 mm, and it is no wider than 2550 mm on the road. The bar height is set hydraulically. The rate is set from 0.5 to 2.5 L/m² in 0.1 L steps, and the sprayed amount stays within ±5 % of the set value.

Cab and Rear Control Panels

The digital panel in the cab controls the spraying, the nozzle groups, the bar and the circulation. It shows the speed in m/min, the distance, the rate in kg/m² and the total bitumen laid. The rear panel controls the heating.

Bitumen Circulation

The same pump fills the tank from an outside source, transfers bitumen to another tank, circulates the tank and the bar, and sprays. The system cannot siphon. A diesel tank flushes the pump and the bar after work, so the bitumen does not set in the lines.

VCCS-2400 Technical Data

Truck

The Vimpo VCCS is built on the customer's truck:

• 10-wheel (6×4) truck: 7,000 L bitumen tank and 9 m³ chip hopper
• 8×4 truck: 9,000 L bitumen tank and 11 m³ chip hopper

Where Is a Combi Chip Spreader Used?

For surface dressing (chip seal) on rural and provincial roads, forest and village roads, and for the maintenance of worn asphalt. One machine and one driver replace a bitumen distributor and a chip spreader, so fewer trucks and fewer people are on the road, and the binder does not cool before the chips arrive.

Vimpo Surface Dressing Machines

For larger jobs, use the Vimpo VAD asphalt distributor with the Vimpo VCS 5400 self-propelled chip spreader. Seal cracks with the Vimpo VCF crack sealing machine.

Combi Chip Spreader: Frequently Asked Questions

What is a synchronous chip sealer?

It is a machine that sprays the bitumen and spreads the chips at the same time, from one truck. The Vimpo VCCS is a synchronous chip sealer: the chips land on the binder while it is still hot.

What is the difference between the A and the M models?

A models have proportional control: a radar measures the speed, and the computer keeps the spray rate set from the cab. M models have manual control. Both have the same tank, pump, spray bar and hopper.

What do the letters T and S mean?

T means a thermal oil boiler of at least 50,000 kcal, which heats the pump jackets and the spray bar. S means a sliding chip hopper that moves 150 mm to each side with a hydraulic cylinder.

Which truck do I need?

The VCCS is built on the customer's truck. A 10-wheel (6×4) truck carries a 7,000 L tank and a 9 m³ hopper; an 8×4 truck carries 9,000 L and 11 m³.

How is the machine cleaned after work?

The pump sends the bitumen back to the tank. Then diesel from a separate tank flushes the pump, the lines and the spray bar.

Get a Quote for a Combi Chip Spreader

Tell us the model, your truck (10-wheel or 8×4) and the binder you use; our team will prepare the quotation.