AP FOAMING MACHINE for EXPANDED POLYURETHANE moulding, COSMEC CMC 60 model with TWO HEADS
complete with refrigerator machine, mixing heads, emulsifier shaft, pumps, pressure switches, pressure gauges, fluid separators in perfect working order.
Possibility and availability of various spare parts.

### Polyurethane Spray Machine: Materials, Operation, Types, Advantages and Convenience of Buying Used

#### Materials Used in a Polyurethane Spray Machine

Polyurethane spray machines are primarily designed to work with:

1. **Foam-based polyurethane**: Used for thermal and acoustic insulation in construction and industrial sectors.
2. **Polyurea**: Used for waterproof protective coatings on surfaces such as roofs, containment basins and tanks.
3. **Epoxy resins**: Used for decorative and protective coatings on vertical and horizontal surfaces.
4. **Polyisocyanurate (PIR)**: Used for high-strength thermal insulation in construction and industrial applications.

#### How a Polyurethane Spray Machine Works

A polyurethane spray machine is designed to dose, mix and spray polyurethane materials onto surfaces. Here are the main components and how they work:

1. **Mixing Unit**: Mixes the polyurethane components (isocyanate and polyol) in the correct ratio to achieve a chemical reaction that forms the desired foam or coating.
2. **Feed Pumps**: Pump the polyurethane components from their respective storage tank to the mixing unit.
3. **Heating System**: Heats the polyurethane components to maintain proper viscosity and accelerate the chemical reaction.
4. **Spray Hose**: Leads the polyurethane mixture to the spray gun.
5. **Spray Gun**: Apply the polyurethane mixture to the desired surface with a controlled spray.
6. **Control System**: Regulates component flow, temperature and pressure to ensure uniform and effective spraying.
7. **Safety systems**: They monitor and protect the system from any malfunctions or emergency situations.

During the operation, the polyurethane components are fed into the mixing system, where they are mixed and heated. The mixture is then pushed through the spray tube to the gun, where it is sprayed onto the surface, expanding and hardening to form an insulating or protective layer.

#### Types of Polyurethane Spraying Machines

1. **Portable machines**: Small and handy, ideal for small jobs or in confined spaces.
2. **Airless machines**: Use technology that sprays material without compressed air, providing consistent spraying and reducing waste.
3. **Pneumatic gun machines**: Use compressed air to spray the polyurethane material, ideal for medium-sized jobs.
4. **Proportional Spraying Machines**: Automatically dose polyurethane components in the desired ratio, ensuring accurate mixing and consistent spray quality.

#### Advantages of a Used Polyurethane Spray Machine

1. **Cost Savings**: Buying a used machine can cost significantly less than buying a new one.
2. **Reduced Depreciation**: Used machines have already experienced most of the initial depreciation, keeping their value more stable.
3. **Access to advanced technologies**: You can afford high-end models that might be out of your budget if purchased new.
4. **Immediate availability**: Used machines are often available immediately, with no waiting time for production or delivery.
5. **Durability**: Polyurethane spray machines are built to last a long time.
A well-maintained machine can function effectively for many years. 6. **Environmental sustainability**: Buying used reduces waste and promotes a more sustainable use of resources.

#### Considerations for Purchasing a Used Polyurethane Spray Machine

- **Machine Condition**: Check the overall condition of the machine, including pumps, spray guns, heating and control systems.
- **Maintenance history**: Ask about previous use and maintenance performed.
- **Functional Testing**: If possible, test the machine to make sure it works properly and has no mechanical or electronic problems.
- **Material Compatibility**: Make sure your polyurethane spray machine is compatible with the polyurethane materials you intend to use.
- **Brand and Model**: Some brands and models are known for their durability and ease of repair.
Research the available models and prefer those with a good reputation. - **Accessories included**: Check if the machine is sold with all the original accessories or if some are missing.

Buying a used polyurethane spray machine can be an advantageous choice, allowing you to get a high-quality machine at a reduced price and contributing to greater environmental sustainability.