OUR SERVICES

We offer Paint Removal Services for industries using paint shop to finish their final product.
We use an advanced, patented Fluidbed paint stripping technologies which is Pollution and Warpage free.

Portfolio

THERMAL CLEANING

How it works

Easy and thorough removal of all types of paint and powder coatings, through thermal cleaning, using the
Dinamec Systems Fluid Clean technology.

We have 3 meter x 1 meter x 1 meter operating envelope for the parts that go through the paint stripping process.

Application: 

  • Removing all possible organic substances like powder coatings, e-coat, top coat, clear coat, cured wet paint, water-based paint, varnish, metallic paint etc.
  • Paint stripping from all kinds of large metal parts such as hooks, frames, jigs, grates, reject parts, and baskets etc.
  • Removing paint from  paint reject parts
    (Paint Defects, Wrong shade)

Our process gives excellent cleaning results while 
complying with the highest environmental regulations. Parts can be turned around in 60 minutes with no inherent risk of distortion. Effective and fast removal of organic coatings such as paint leaves components surface as brand new.

 

1. Decoring

Removing the sand cores from the aluminum parts is often a tedious job as the sand cores can be very integrated inside the casting and hard due to the use of organic binders.

The Dinamec Systems’ Deco fluid bed installation is the perfect solution for the gentle and smooth decoring of aluminum parts.

The heat dispersion in the fluid sand bed is perfectly homogeneous and as it is a foundry sand bed, the remaining foundry sand can simply stay in the machine. A sand spout will automatically remove any surplus of sand, which can then be recovered for new castings production.

Decoring, Heat treatment & Sand Recovery in a Fluidized Bed

The complete operation involves decoring, solution heat treatment, quenching and aging and this process can be fully automated.

2. Solution Heat Treatment

Simultaneous or separately to the decoring, aluminum castings can undergo a rapid solution heat treatment with cycle times 3 to 4 times shorter than in a conventional air heat treat furnaces.

3. Quenching

After the solution heat treatment, the castings can be quenched in a Dinamec Systems Water Quench or a Dinamec Systems fluidized sand bed.

4. Aging

A final aging step can be added in a conventional air oven or again, a hot fluidized sand bed.

Using the fluidized bed for the aging will provide reduced residence times while obtaining similar or better mechanical properties compared to traditional air furnaces.

5. Deco + Fully Automated Product Line

Installation consists of three consecutive fluid beds, operating in one fully automated production line.

The First Fluid Bed operates at a temperature ranging between 968-1020º F, and removes the sand cores from the aluminum castings by gasification of the organic binding materials. The excess sand coming from the moulds & cores is collected and can be reused for the production of new sand moulds. At the same time the solution heat treatment is performed.

The Second Fluid Bed is working at room temperature (70 to 170º F) and is used to quench the aluminum castings after the decoring and solution heat treatment. The sand in this second bed is constantly cooled down to its set temperature.

The Third Fluid Bed is operated at temperatures between 320-470º F, and is used for the ageing of the aluminum parts. Ageing will only take 60-120 minutes with this process.

3 to 4 Times Faster Production Process
The process can be fully automated. The complete operation (decoring, solution heat treatment, quenching and aging) typically takes between 3 to 4 hours.

How it works

FLUIDIZED BED CLEANING CYCLE​

0. Fluidised bed  1. Calibrated quartz sand  2. Air supply
3. Primary air  4. Gas-air distributor  5. Gas-air mixture
6. Pilot burner  7. Main flame  8. Post-combustion chamber
9. Machine parts  10. Pyrolysis gases  11. Gas air mixture
12. Secondary air supply  13. Insulating layer  14. Exhaust fan  15. Basket

1 A fluidized bed consists of a reservoir filled with calibrated sand.

2 The sand particles are brought to a bubbling state by injecting air at the bottom of the bed.

3 In order to warm up the sand, gas is mixed into the primary air.

4 A pilot burner above the surface of the bubbling sand bed ignites the gas-air mixture – the flame spreads across the whole surface.

5. Due to the excellent heat transfer in the bed itself – the fluidized bed is heated quickly and uniformly

6. Normal operating temperatures ≈780 to 850°F

7. The bed temperature can be adjusted by using an automatic temperature regulator, which controls the gas flow. 

8. Immersion of basket with contaminated metal parts in hot sand.

9. The bonded organic substances are gasified. 

10. These process gases rise through the fluidized bed and are directly burned by a flame-shield.

11. The energy is also directly absorbed by the sand – direct energy recovery – the external gas supply is correspondingly reduced.

12. Total burnout of the gases by injecting secondary air into the combustion chamber.

13. Inorganic particles are also removed from the metal parts (without damage) by slight movement of the sand and are carried along with the flue gas stream.

14. These inert dust particles are seperated from the flue gases by de-dusting through a cyclone battery or ceramic filter. The particles fall into the collector reservoir under the cyclone or ceramic filter and can easily be removed.

The next cycle can begin immediately by immersing another basket in the fluidized bed with the hoisting system.