Case history: Super-size grinders designed for Chinese client
Canadian Plastics
A few months ago, a major Chinese plastics processor turned to Mould-tek Industries Inc. of Scarborough, ON to solve a challenging waste problem. The project consisted of recycling a wide range of pro...
A few months ago, a major Chinese plastics processor turned to Mould-tek Industries Inc. of Scarborough, ON to solve a challenging waste problem. The project consisted of recycling a wide range of products — from large shipping crates and boxes, pallets and large diameter thick-walled pipe to smaller bottles, closures, sprues and runners.
The customer specified throughput of 1800-2300 kg/hr (4000 to 5000 lb./hr.) for the largest of the multiple grinders, with a strong emphasis on rugged equipment, strength and safety. All grinders had to be equipped with evacuation blowers and fines separators, and the larger ones required feed conveyors.
Mould-tek provided a complete turnkey recycling system consisting of two very large grinders, one medium sized unit and two smaller units. The grinders are manufactured by Rotogran International Inc. (Concord, ON).
The two very large Super grinders have 107 x 132 cm (42×52 in.) throats, and 300 hp motors. They stand 5.5 m (18 ft.) high, and are equipped with variable speed inclined conveyors and evacuation blower/fines separator systems.
The large units were built with heavy duty 30.5 cm (12 in.) diameter rotor shafts and 10 cm (4 in.) thick blade supports. The bearings are oversized in a duplex configuration to easily absorb shock. Each bearing is equipped with double grease fittings and temperature monitoring devices with high temperature alarms.
The hoppers are double wall, reinforced construction, with a layer of sound absorbing material sandwiched between the walls. A machine-mounted hydraulic power pack tilts the hopper and raises or lowers the screen cradle for easy access and clean out.
Mould-tek Industries Inc. 416-285-5400
