The development history of foaming machine_how to use foam machinery

In terms of how to use foam machinery, analyze the relevant situation that Huasu knows or understand, so that you can have more knowledge about the industry in addition to understanding Huasu! The foaming machine first appeared in foreign countries, and its original model used the impeller to rotate at a high speed to make foam, so it was also called 'foaming machine'. Later, with the continuous advancement of technology, the technical content of foaming machines continued to increase, new models continued to appear, and different technical systems were formed. my country began to use foaming machines as early as the 1950s, but instead of special foaming machines, mortar mixers were used. That is, the foaming agent is directly added to the mortar mixer or concrete mixer, and the foaming machine and the mortar or concrete are mixed together to generate foam. Later, around the 1970s, dedicated foaming machines, namely high-speed impeller foaming machines, began to appear. In the future, the technology has been continuously upgraded and replaced, and now it has developed into a third-generation model with high-pressure inflation as the main body, which can basically meet the needs of foam concrete. However, compared with foreign developed countries, my country's foaming machine has a low degree of automation, and there is still a certain gap in foaming performance, which needs to be further improved. From the perspective of development trends, this gap is gradually narrowing and narrowing. The main advantage of my country's foaming machine is its low price. Most imported models are more than 100,000 yuan/unit, and the highest is 150-200,000 yuan/unit, while most domestic models are tens of thousands of yuan/unit, and the simplest and smallest models are even several thousand yuan/unit. They have certain advantages in price. Therefore, it is suitable for foaming according to the national conditions, and the development of foaming machines is welcomed by most small and medium-sized enterprises. More people like it: a certain amount of foaming agent and water vapor are retained in the pre-expanded beads of the foam machinery and equipment. When they are out of the machine, they will condense into a liquid, and the liquid foaming agent will dissolve into the polystyrene to make the bubbles. The pressure drops quickly, negative pressure (partial vacuum) appears in the bubble, and the beads are very soft and easily deformed. Therefore, when air is sent, try not to make the wind pressure too large. The inner wall of the duct should be as smooth as possible, and the bending radius should be as large as possible (to reduce collision resistance). The pipeline should be a good conductor of electricity, and the entire line must be grounded to avoid static electricity. Sparking, the transmission speed should not exceed 8m/s to avoid damage to the beads. A certain amount of foaming agent and water vapor are retained in the pre-expanded beads of the foam machinery and equipment. When they are discharged from the machine, they will condense into a liquid, and the liquid foaming agent will dissolve into the polystyrene to quickly reduce the pressure in the bubbles. , There is negative pressure (partial vacuum) in the bubble, and the beads are very soft and easily deformed. Therefore, when air is sent, try not to make the wind pressure too large. The inner wall of the duct should be as smooth as possible, and the bending radius should be as large as possible (to reduce collision resistance). The pipeline should be a good conductor of electricity, and the entire line must be grounded to avoid static electricity. Sparking, the transmission speed should not exceed 8m/s to avoid damage to the beads. The beads of the foam mechanical pre-expansion machine are wet. After being released from the pre-expansion machine, due to the development of suction, how to use the foam machinery to condense the air, it suddenly encounters cold, causing the foaming agent in the honeycomb cells to condense and cause negative formation in the cells. Therefore, the beads must be placed for a period of time after the pre-expansion. On the one hand, they are dried, and on the other hand, they are allowed to infiltrate the air to eliminate the negative pressure, so that the internal pressure and external pressure in the cells are balanced to prevent the cells from collapsing and The beads are elastic. The process of drying, cooling and stabilizing the cell pressure of the EPS beads just out of the pre-expander is called maturation. Maturation improves the further expansion of the pre-expanded beads during the molding process, the fusion between beads and the elasticity of the beads, which is beneficial to improve the quality of EPS products. The above is a brief introduction about 'how to use foam machinery'. Our company also has foam box production equipment, Huasu and many other related products. If you are more interested, you can contact us for more detailed information!
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