Polyurethane Foaming Technology and Performance Mechanism of polyurethane foaming machine

Polyurethane foam is a high molecular polymer which is made of isocyanate and polyether as the main raw materials, mixed by special equipment and foamed by high pressure spraying under the action of foaming agent, catalyst, flame retardant and other additives.

Polyurethane foam is divided into soft foam and hard foam: soft foam is open-cell structure and hard foam is closed-cell structure.

Rigid polyurethane is also widely used in thermal insulation walls in northern China, and we are old friends.

The open-cell structure of polyurethane soft foam is sound-absorbing and breathable, and can also wash dishes.

Polyurethane soft foam can be divided into two types: skinning and non-skinning, but their main functions are cushioning. The finished products are often used in sofa furniture, pillows, cushions, toys, clothes and sound insulation linings. The main features are light and soft, good resilience, low relative density, high specific strength, sound absorption, ventilation and thermal insulation.

Polyurethane rigid foam is mainly used for thermal insulation, refrigeration equipment and cold storage, thermal insulation board, wall insulation, pipeline insulation, storage tank insulation, one-component foam joint filling materials and so on.

This new synthetic material with thermal insulation and waterproof function has a low thermal conductivity, only 0.022 ~ 0.033 W/(m * κ), which is half that of extruded board, and is the lowest thermal conductivity of all thermal insulation materials.

Rigid polyurethane foam is mainly used in building external wall insulation, roof waterproof and thermal insulation integration, cold storage thermal insulation, pipeline thermal insulation materials, building plates, refrigerated trucks and cold storage thermal insulation materials.

Polyurethane foam has a wide range of applications, almost permeating all sectors of the national economy, especially in furniture, bedding, transportation, refrigeration, construction, thermal insulation and other departments, and has become one of the indispensable materials.

Polyurethane foaming machine has compressibility and impact resistance, moreover, the cured polyurethane foam is difficult to break and will not fall off, so it can be safely produced and used. Coupled with its low thermal conductivity, it provides good thermal insulation and heat insulation, thus reducing the risk of accidents.

A detailed understanding of the type and working principle of the machine. The working principle of most effervescent agents is to introduce gas into aqueous solution, but the introduction methods are different. The pressure is different, even if it is the same, but the amount of bubbles produced is also different.

Second, understand the installation capacity of the machine. That is, in the total installed power, this data has a lot of information to calculate the total power consumption.

Third, understand the amount of foam produced. Polyurethane foaming machine's foam output should be 0.2 higher than the actual demand. It has some extra space, easy operation and good performance.

When filling with polyurethane foaming machine, do not fill the whole gap, but leave a part of the gap. After all, the foam increases, and when the foam is completely filled, it will overflow and be wasted.

In addition, temperature and pressure are two key variables, and reasonable control can effectively improve work efficiency.

Proper pressure control and higher flexibility.

In the working process, once the pressure of polyurethane foaming technology is too low, it will affect the real foaming speed. Once the pressure is too high, more professional equipment is needed to increase the cost.

The pressure can be changed by setting the action times of the air pump, thus improving the flexibility and not affecting the normal use.

Proper temperature control, quick response and stable performance.

In the process of using polyurethane foaming technology, the temperature should be controlled within a certain range. Once the temperature is too low, the reaction speed of the machine will slow down and the curing time will be prolonged, which is not conducive to the improvement of work efficiency.

In order to ensure more stable performance, PID control method is needed to improve work efficiency.

What else should I pay attention to?

When producing polyurethane materials, professional spray guns and hoses need to be prepared. Spraying equipment needs to be cleaned in advance. Don't worry that it will take a lot of time to clean the equipment. If it can't be cleaned, it will seriously affect the work process.

After spraying, it needs to be cleaned with special cleaning agent. When the materials are no longer supplied, take down the spray gun head and the bracket and put them in the solvent tank.

If you want to continue to use it, put part of the detergent in another container for next use.

If you don't want to continue using it that day, use it the next day. It is necessary to turn off the air supply of the spraying system to keep the inside of the equipment clean and free from external influences.

If you want to put it on hold for a period of time, you need to fill up the filling liquid to avoid the freezing state of the spraying system.

We respect originality. Textual beauty material, copyright belongs to the original author. Some articles cannot be contacted with the original author for various reasons. If copyright issues are involved, please contact us and deal with them immediately.