DORMAC :: Industries - Our industrial strengths & achievments

Paper & Pulp Industry DORMAC maintains a “State of the Art” Machine Shop that enables us to custom build new machinery and rebuild used machine components. Included in this facility is a steel fabrication shop and electrical shop. Operating this facility adds one more link to the turn-key chain of services that DORMAC provides. When the millwrights need components repaired or fabricated, we do it in-house. Our in-house machining facilities are especially helpful for a shutdown or emergency situations. DORMAC is able to offer a wide range of services in line with the Paper and Pulp Industry needs, these include: Low & high pressure feeders Overhaul of feeders Supply of new low-pressure feeder rotors Supply of new forged steel stub shafts complete with stellite coated gland sleeves. Rotary valve and liner Supply of new cast stainless steel liners, fully machined and ground. Re-condition of rotary valves complete with hardwearing welding.

 

Refiner rotor discs

• Weld repairs to refiner rotor discs
• Slimming of ‘Run Out” in rotor discs – shaft & disc assembly

Reel lowering cradle

• Manufacture

Chip Sorting Screen

• Manufacture

Suction & Pope Rolls

• Modification, line boring and replacing of stub shafts.

Paper Rolls

• Manufacture, repair and placing of stub shafts.

Log Grabbers

• Repairs and manufacture of spares

Saveall shaft

• Repairs

Chipper wheel

• Repairs and manufacture of sliver rings.

Jones refiner housing & sliding heads

• Repairs and modification

Gearbox

• Repairs

Turbo separator vat

• Repairs

Feed screws

• Top separator scroll & basket
• Ribbon feed screw
• Metering screw conveyors
• Tube screws
• Thune screws
• Copeland cooling screws & troughs
• Repair & manufacture of the above

Sprout waldren doors

• Repairs

Hydro Pulper rotor

• Repairs

Sprout refiner housing

• Repairs

Sugar Industry

DORMAC is able to offer a comprehensive range of specialized services for the sugar industry and apart from the specialized services below, DORMAC regularly manufactures and supplies conventional equipment for expansion and new projects for the sugar industry.

Mill rollers

• Re-grooving of mill rollers – 84” – 72” – 60” & 54” and underfeed rolls
• Refurbishing of bearing journals, pinion seating journals, drive squares and juice-corroded shell seating journals.
• Manufacture of new rollers, supply of mill roller shafts with certification

Centrifugal Baskets

• Manufacture of new centrifugal baskets.
• Extensive replacement of base plates, shells, top plates and hoops of baskets. Dynamic balancing of all baskets.

Head shafts

• Manufacture and repairs to head shafts

Mill pinions / bearings

• Supply of mill pinions and mill bearings. All mill sizes

Cane knife rotors

• Supply of new rotors, supply of new loose palms and extensive repairs to cane knife rotors

Mill roll flanges / Juice guards

• Manufacture and supply

Coupling boxes

• New and refurbishing of coupling boxes

Tailbars

• Supply of mill tailbars with certification. All sizes and shapes.

Worm-wheels

• New worm wheels with cast teeth for crystallisers

Pump / Gearbox bases

• Fabrication , stress relieving and machining of bases

Mill caps

• Refurbishing

Juice heater doors

• Repairs

Hoppers

• Fabrication of new hoppers – repairs

Boiler fans

• Repairs to boiler fans
  

Machine Engineering

Our machine shop in Durban and Richards Bay are fully equipped to carry out any kind of repair or manufacture of mechanical parts. Only experienced artisans under the full-time leadership of our engineering managers’ staff the shops.

The Machine shop is 4700 square meters of covered machine shop area with turning, boring and shaping capacity up to 25 tons with stress relieving furnace, all served by overhead carnage with a capacity of 25 tons.

Our vast array of capable equipment coupled with knowledgeable artisans, has empowered DORMAC’s machine shop to gain an envious reputation as being able to complete emergency repairs as well as planned refurbishments in the allotted time frames at the right price. The machine shop is able to successfully refurbish or remanufacture any number of parts or mechanical accessories. The machine shop under the rules and regulations of International Class requirements as well as under the quality control of ISO 9002 requirements has set firm presidents in the local and international engineering fields.

The Machine Shops are equipped with the following:

• Vertical boring mills
• Horizontal boring mil
• Various Lathes
• Milling machines
• Surface grinders
• Shapers
• Furnace
• Drill presses
• Cut – off saws
• Hydraulic presses
• Sub-arc welding machine

The classification approved repair works undertaken by the machine shop include:

• Shafts & rudders
• Pumps and castings
• Fabrication and reconstruction of shafts, wear rings and bushes.
• Pressure vessel fabrication and repairs
• Repairs and reconditioning of cracked castings and cylinders
• Conrods
• Piston Crowns
• Turbines
• High tensile steel fabrications
• General ship repair and maintenance

Fabrication

DORMAC are specialists in heavy marine & industrial fabrication, with a fully equipped workshop. Our workshop holds some large equipment including a hearth furnace with capacity for sugar roller shafts, shells, rudder stock and tail shafts.

Fabrication from ferrous and non-ferrous parts or complete assemblies are quoted on and manufactured on a 24 hour basis. Working in conjunction with the other divisions on a common project, costs are drastically reduced.

The benefits of a 24 hour operation i.e. eliminating daily shut down and start up delays, are reflected in our pricing structures, which provide DORMAC with a major advantage over our competitiors.

The fabrication shop has an undercover area of 1000 square meters which is equipped with modern cutting, rolling, pressing and welding equipment, coupled with a 5000 square meter open air grillage area served by a 120 ton and 30 ton Goliath Crane.

The classification society approved works undertaken by the fabrication shop include:

• Furnace cooling equipment
• Pressure vessels
• Vent heads
• Manhole covers
• Rolled to fit steel plating
• Pipe work
• Long bore ducting

General Engineering

• New bolster plate manufacture for Toyota & Defy Industries
• Drilling of stern tube flange
• Grinding to size hard-face welding on radar feeder

Automotive and Tool making

DORMAC has the capability to machine complex 3D and 2D surfaces and shapes using CATIA V5 cad/cam software. These capabilities combined with experienced tool making artisans that allow DORMAC to service the automotive tool making industry and other allied avenues where complex surfaces and shapes are required for machinery.