DESIGN OF COOLING SYSTEM OF HIGH PRESSURE FOAMING MACHINE

The high-pressure foaming machine is mainly used to produce large quantities of high-resilience, self-skinning and slow-resilience polyurethane products, as well as other foaming fields. It can be seen that it has a variety of unique advantages. Its operating process is to store the liquid polyol and isocyanate two raw materials in two tanks respectively, and send the raw materials to the mixing head through two rotary axial (or radial) plunger metering pumps. When opened under the action of hydraulic drive, the two components are injected into a small mixing chamber at high pressure and flow rate, collide with each other, achieve the purpose of mixing through the conversion of kinetic energy, and flow out of the mixing head into the mold cavity. The injection time is over. After that, the piston rod of the mixing head advances forward, and all the materials are pushed out of the mixing chamber. At the same time, the inner wall of the mixing chamber is cleaned by the piston rod without leaving any residual materials.

The use of high-pressure foaming machine temperature controllers in other industries is an inevitable condition for the composition of the equipment, and the name is also different. It is called an oil heater in the temperature control of the PVC sheet roller, a temperature control device in the extruder equipment, and a mold temperature control machine or a temperature control machine in the rubber internal mixer equipment. These equipments are basically a first The temperature rises quickly, followed by the process of keeping warm. In the rubber equipment, it needs to perform a long-term cooling process after heating up.

The temperature controller of the high-pressure foaming machine has a dual-purpose type for cooling and heating. It is used to heat or cool the two materials of ISO and POLY storage tanks to reach the set temperature. Two sets of tubular coolers need to be set up. The inside material is made of SUS304 stainless steel, which is used for the output of A and B raw materials or the constant temperature during reflow.