Working principle of high pressure foaming machine

The pouring head position control mechanism of the high-pressure foaming machine includes the pouring head and the sleeve set outside the pouring head. A vertical hydraulic cylinder is arranged between the sleeve and the pouring head. The cylinder body of the vertical hydraulic cylinder is connected with the sleeve. The valve The rod is connected with the pouring head. At the same time, there is a horizontal guide rail on the cement foaming machine body, and a guide slot hole matching the guide rail is provided on the sleeve. A horizontal hydraulic cylinder is provided between the high-pressure foaming machine body and the sleeve. The cylinder body of the horizontal hydraulic cylinder is connected with the body of the high-pressure foaming machine, and the valve stem is connected with the sleeve. The utility model has the advantages of labor saving and high production efficiency.

high pressure foam machine
The two components A and B of the polyurethane foaming machine are precisely proportioned and stirred at a high speed, and the two components A and B are delivered to the mixing head by two high-precision metering pumps. After high-speed and strong stirring, the material liquid is evenly sprayed out to form the desired product.

A complete high-pressure foaming plant consists of the following systems: material flow system, metering system, air circuit system, heating system, cleaning system, special equipment for polyurethane foam infusion and foaming. As long as the polyurethane component raw materials (isocyanate and polyether polyol components) meet the performance indicators of the formulation. It is made of polyether polyol and polyisocyanate in the presence of foaming agents, catalysts, emulsifiers and other chemical additives, after chemical reaction foaming and foam. There are three types of foaming process in the high-pressure foaming machine: pre-polymer method, semi-polymer method and one-step foaming pre-polymer method foaming process is to make pre-polymer (white material) and (black material) first, and then add water, catalyst, surfactant, other additives in the pre-polymer mixed under high-speed stirring for foaming, after curing at a certain temperature can be matured. The foaming process of the semi-prepolymer method is to make part of the polyether polyol (white material) and diisocyanate (black material) into a prepolymer first, then add another part of the polyether or polyester polyol and diisocyanate, water, catalyst, surfactant, other additives, etc., and mix them under high speed stirring for foaming. The polyether or polyester polyol (white) and polyisocyanate (black), water, catalyst, surfactant, blowing agent, other additives, etc. are added in one step and mixed at high speed for foaming. The one-step foaming process is the most common process used today. There is also the manual foaming method, which is the easiest method, where all the raw materials are weighed accurately, placed in a container and then immediately mixed and injected into the mould or space to be filled with foam. Note: The polyisocyanate (black) must be weighed in last.

The polyurethane foam machine generally foams at room temperature, and the molding process is relatively simple. According to the level of construction mechanization, it can be divided into manual foaming and machine foaming; according to the pressure of foaming, it can be divided into low-pressure foaming and low-pressure foaming; according to the molding method, it can be divided into pouring foaming and spraying foaming.

Post time: Feb-17-2023