What is the difference between high pressure and low pressure of polyurethane foaming machine.

Item: High Pressure Foaming Machine Low Pressure Foaming Machine.

Expensive Cheap.

Machine-made Precision. It's easy to make. (Can be made in China.)

The mixing efficiency of the material is good, the foam cell structure is stable and uniform, and the insulation performance is good. The mixing efficiency is not good, the foam is uneven, and the insulation performance is poor.

The method of material mixing is strongly mixed by the pressure of the mixing chamber of 120 200 bar, and the motor is used to forcibly mix in the mixing head.

Cleaning of the pipette head After the pouring is completed, there will be no residual material left in the mixing head, and the surrounding area will always be clean Due to the large space inside the mixing head, there will be residual material left, in order to remove these materials. Methane chloride had to be used.

and other solvents that are harmful to the environment.

Saving raw materials Because it does not produce residual materials, foam, it will save the amount of stock solution used (about 5 10%) Because the mixing efficiency is not good, there are many residual materials, so the amount of stock solution used is ratio.

High pressure foaming machine 5 10% more

The environment is easy to manage and start, and the surroundings are always clean. Difficult to manage, poor surroundings.

Product quality The product quality is excellent. It's hard to make high-quality products.

Late foaming Due to the good mixing efficiency, late foaming will not occur. Due to poor mixing efficiency, later foaming will occur.

Adoption No environmental pollution. Low-pressure foaming machines have been banned in Europe.

Durability Good durability. Poor durability.

The use of the production line can be used for automated production lines, which can only be used for manual production, not for automated production.

The main operation process of Jinan magnesium Grotto foamed magnesite cement:

1. Weigh the GX-7 foaming agent, then add 80 times of water to dilute it to make a foaming solution, note: reduce the amount of water appropriately when the temperature is low;

2. Add brine, modifier and light burning powder to the mixer in turn, and equip magnesite cement slurry;

3. Start the foaming machine and form foam through the foaming machine;

4. Add the foam to the magnesite cement mixer according to the established amount and mix evenly;

5. Send the prepared foamed magnesite slurry into the molding machine or mold molding.

First, the principle is different.

1. High pressure of polyurethane foaming machine: The stock solution of two components A and B is transported to the mixing head by two high-precision metering pumps after accurate proportioning and high-speed stirring. After high-speed and strong stirring, the material liquid is evenly sprayed to form the desired product.

2. Low pressure of polyurethane foaming machine: it has an automatic feeding device, which can be arbitrarily fed at any time. A and B drums can hold 120 kg of liquid. The barrel is equipped with a water jacket, which uses the water temperature to heat or refrigerate the material liquid, and each barrel is equipped with a water tube and a material tube.

Second, the characteristics are different.

1. High pressure of polyurethane foaming machine: advanced pouring head structure, reliable performance, easy operation, simple maintenance, Sun Weimao can do three-dimensional movement before and after, left and right and up and down;

2. Low pressure of polyurethane foaming machine: the pouring amount can be adjusted from 0 to the maximum pouring amount, and the adjustment accuracy is 1%.

Third, the application is different.

1. High pressure of polyurethane foaming machine: it can be used for automotive interiors, thermal insulation wall spraying, thermal insulation pipe manufacturing, and the processing of buried sponge for bicycle and motorcycle seats.

2. Low pressure of polyurethane foaming machine: widely used in multi-mode continuous production of rigid and semi-rigid polyurethane products, such as: petrochemical equipment, directly buried pipelines, cold storage, water tanks, instruments and other thermal insulation and sound insulation equipment process products.

First of all, the pump is different, and secondly, the mixing form is different. The mixing of AB material of the high-pressure machine depends on the pressure provided by the main pump, and the AB material is atomized and hit, and the mixing of the low-pressure machine is to push the AB material by air, stirring each other in the mixing pipe, and finally achieving mixing. The mixing end of the high-pressure machine does not need to be cleaned, and it is easy to use, and it is slightly higher.

The high-pressure foaming machine has a pressurization device, and the AB material is mixed by high-pressure impact, and the mixing is uniform and the machine head is not easy to block;

The low-pressure foaming machine does not have a pressurization device, and the AB material is mixed by the motor stirring and mixing, the mixing is uneven and the head has a lot of residual material, which is easy to toxin.

Foaming machines include pouring machines and spraying machines.

The high-pressure polyurethane pouring machine relies on high pressure to atomize the two materials and mix them at high pressure in the mixing chamber, and there is no need for solvent cleaning after use. The high-pressure machine mixes evenly, automatically cleans thoroughly, and is not easy to clog. The medium pressure or low pressure polyurethane pouring machine relies on the high-speed rotation of the motor mixing head for mixing, and needs to be cleaned with MC or other solvents after use.

The mixing of the low-pressure machine is uneven, and there is a lot of residual AB material in the tip of the pipette, which is not easy to clean up and easy to block. Yabu Machinery - the first supplier of high-end polyurethane foaming machine.

Our company produces high-pressure foaming machines, and I agree with what I said upstairs, but the foaming effect and material consumption of foaming materials are obviously much better than those of high-pressure machines.

It is best to use high-pressure equipment for high foaming quality.

This question is answered by Yabu Machinery - high-end polyurethane foaming machine manufacturer

The AB material mixing of the high-pressure polyurethane foaming machine relies on the main pump to provide pressure, and the AB material is mixed by high-pressure impact;

The mixing of low-pressure polyurethane foaming machine is to push the AB material by air, stirring each other in the mixing tube, and finally achieve mixing.

The mixing end of the high-pressure polyurethane foaming machine does not need to be cleaned, and it is easy to use.

The mixed end of the low-pressure polyurethane foaming machine has a large amount of residue, which needs to be cleaned, otherwise it will be clogged and more troublesome.

The high-pressure polyurethane foaming machine saves more than 10% of raw materials;

The low-pressure foaming machine wastes raw materials.

The material pump is different from the head, and the power control mode is the same. The low-pressure foaming machine needs to clean the mixing head, and the high-pressure does not need to. However, the low-voltage machine is more durable, and the ** is lower. Low-voltage machine recommended Shiding brand equipment, Hebei Feihu mechanical and electronic polyurethane equipment.

The main features of the high-pressure foaming machine are as follows.

The mixing effect is good, and when the two-component material is mixed, high-pressure injection and impact mixing are used, and the mixing method has a very high uniformity.

There is no residual material and no cleaning agent, because the mixing chamber is a cylinder and piston structure. When the two-component material is mixed in the cylinder, the piston automatically presses down to remove the remaining material. Of course, this requires high matching accuracy and material of cylinders and pistons.

The manufacturing cost is higher.

The circulating pressure of high-pressure foaming machine material is generally 5 1OMPA; The high-pressure foaming machine controls the oil pressure, which is generally 10 15MPa; This kind of high-pressure system will inevitably cause higher costs than low-pressure machines.

High energy consumption. Compared with the energy consumption of low-voltage machine, it is 30% to 50% higher.

Excessive foaming. High-pressure injection, the impact mixing uniformity is good, but the heat is large. If the heat dissipation treatment is not good, it is easy to over-foam. There is a very detailed manual of high-pressure foaming machine prepared by a company in the global polyurethane community equipment area, you can go and see it.

Advantages of polyurethane foaming machine equipment.

1.It has the characteristics of small size, light weight, low failure rate, simple operation and easy to move; Jinan polymeric polyurethane equipment company.

2.The two-stage pressurization device ensures that the proportion of equipment discharge is fixed and the product yield is improved;

3.The feeding volume can be adjusted, and it has the function of timing and quantification, which is suitable for batch pouring and improves production efficiency;

4.The most advanced ventilation method is adopted to ensure the working stability of the equipment to the greatest extent;

5.The multi-material filtration device can minimize the problem of spraying clogging;

6.Multiple leakage protection systems can protect the safety of operators;

7.Equipped with an emergency switch system, it can respond to emergencies as quickly as possible;

8.The user-friendly setting of the equipment operation panel makes it easy to master the operation mode;

9.The most advanced pouring gun has the advantages of small size, light weight and low failure rate;

10.The lifting pump adopts a large ratio method, which can easily feed the material even when the viscosity of the raw material is high in winter.