What are the cooling methods for blow molding machines?

What are the cooling methods for blow molding machines that require cold water cooling? Hollow blow molding machines are generally divided into screw cooling, body cooling, and product cooling. The function of screw cooling is to eliminate frictional overheating, stabilize plastic extrusion pressure, promote uniform mixing of plastic, and improve plasticization quality.
But its use must be appropriate, especially not too severe, otherwise the sudden cooling of the plastic melt inside the barrel can lead to serious accidents. Screw cooling is absolutely prohibited before extrusion, otherwise it may cause serious equipment accidents. The function of body cooling is to increase the heat dissipation of the barrel, in order to overcome the temperature rise caused by frictional overheating. This temperature rise cannot be stopped during the plastic extrusion process, even after cutting off the heating power, which makes it impossible to maintain a reasonable temperature for a long time. It is necessary to increase heat dissipation and cool down the barrel to maintain thermal balance during the extrusion process. The cooling of the fuselage is carried out in sections, mainly using fan cooling, considering the different functions of each section of the fuselage.
Pay special attention to the use of homogenization section cooling. Product cooling is an important measure to ensure the geometric shape and internal structure of the product. The plastic extrusion layer should be cooled immediately after leaving the machine head, otherwise it will deform under the action of gravity.