Views:5 Author:Site Editor Publish Time: 2020-12-08 Origin:Site
High pressure is widely used in polyurethane products, and polyurethane products are widely used in daily life. Because its working principle is to introduce air into the aqueous solution of the foaming agent, the foaming agent and the air are fully integrated to form a bubble cavity.
There are many types of high-pressure foaming machines, among which polyurethane high-pressure foaming machines are a common one. Polyurethane is a common chemical material, and it can be found in all aspects of life. Because it has good impact resistance, heat insulation, heat resistance, chemical resistance and sound absorption properties, it can be freely colored, easy to cut, perforate, and bond processing. It is widely used in construction, industry and Daily necessities. Such as airplanes and automobiles are widely used.
How to choose a polyurethane foaming machine?
1. To choose a polyurethane foaming machine, you must first determine the purpose. Is it to make small PU products, or to make large refrigerators, warehouse boards, etc. The foaming machine required is different.
2. Polyurethane foaming machine configuration. The selection of some precision components is also very important. Many domestic components are very different from foreign ones, such as mixing heads, metering pumps, couplings, etc. The price of the foaming machine is different when the production process is different. Choose as many as possible Watch out.
3. Foaming quality of polyurethane foaming machine. This is the most important thing. No matter how well-designed foaming machine is, the foaming quality is not good, and it doesn't have much effect.
4. The price of the foaming machine. If you understand the above three points, you will understand that when purchasing a polyurethane foaming machine, the price is not fixed and needs to be considered comprehensively. It is necessary to make a careful analysis and reference when purchasing, in order to obtain more benefits with appropriate investment.
Does temperature affect the foaming of polyurethane foaming machine?
Polyurethane foaming machine is inseparable from heat during operation, so how much influence does air temperature have on polyurethane foaming agent?
The foaming machine relies on heat to operate. With the heat, the foaming agent will evaporate to produce foam. The heat comes from two aspects, one is the heat generated by the chemical reaction, the other is provided by the environment, and the former is Fixed, not affected by external factors, the heat provided by the environment changes with changes in the ambient temperature.
Air temperature is very important for polyurethane foaming machines. Experiments show that the foaming volume at an ambient temperature of 15°C is 25% smaller than that at 25°C. On the other hand, it will form a layer on the foam surface that is not fully foamed or even foamed. The non-foaming hard skin increases the foam infusion and increases the foam production cost. Therefore, we must strictly control the environmental temperature factors during the operation.