The blow molding process begins with softening plastic by heating a preform or parison. The parison is a tube-like piece of plastic with a hole in one end through which compressed air can enter.

What is a parison in blow molding? In the realm of blow molding, a parison is a significant element—a hollow tube-shaped structure formed from molten plastic, acting as the starting point in the …

Jul 14, 2021 · The parison (continuous sleeve), which is produced by an extruder, a continuous-action unit, serves as a blank for blowing. Due to the continuous process of extrusion of the parison, the …

The meaning of PARISON is even balance between the members of a sentence.

Oct 22, 2025 · …a thermoplastic hollow tube, the parison, is formed by injection molding or extrusion. In heated form, the tube is sealed at one end and then blown up like a balloon.

The raw material in this process is a thermoplastic in the form of small pellets or granules, which is first melted and formed into a hollow tube, called the parison. There are various ways of forming the …

Jun 13, 2025 · A parison (also called a preform) is injection-molded and then transferred to a blow mold. Used for precise, small containers like pharmaceutical bottles. The parison is both stretched and …

May 20, 2024 · The parison is a crucial element in the blow molding process, as it serves as the precursor to the final hollow plastic product. Its formation and characteristics directly influence the …

To design a blow moulded product, you must understand the interaction between the molten plastic parison and the mould. If you’ve blown a bubble from bubble gum you can understand blow …

Sep 21, 2025 · A parison is a term used primarily in glassblowing and polymer processing that refers to the initial shape of molten glass (or plastic) before it is further inflated or molded into its final form.