Parison formation inflation

Fig. 14.26 Diameter (SD, thickness (S7), and weight (Sw) swell of a parison extrudate from a commercial blow-molding machine equipped with CCD camera equipment and parison pinch-off mold based on the design of Shepak and Beyer (69). (a) A chain extended multibranched polyamide-6 resin (b) the former with 12% glass fiber of 10 pm diameter 60 1 L/D and (c) polyolefin modified polyamide-6 with some carbon black. [Reprinted by permission from A. H. Wagner and D. Kalyon, Parison Formation and Inflation Behavior pf Polyamide-6 During Extrusion Blow Molding, Polym. Eng. Sci., 36, 1897-1906 (1996).]...

A. H. Wagner and D. Kalyon, Parison Formation and Inflation Behavior of Polyamide-6 during Extrusion Blow Molding, AIChE J., 36, 1897-1906 (1996). 

Extrusion blow molding is a continuous process capable of high production rates. This process (Figure 8.1) involves three main stages parison formation, parison inflation, and part solidification. It has a number of... 

Blow-molding processes consists of five main operations plastication of the resin, formation of the parison, inflation of the parison, solidification of the part, and removal of the part from the tooling. The best process economics will occur with a part optimized for weight and a minimum cycle time. In order to have a minimum cycle time, the cooling operation must be the rate-limiting step. For the case study... 

They have in common the formation of the precursor, a simple hollow tube known as a parison. One end of the parison is closed (for instance, simj nipped) so that it can be inflated in the heated, softened state. If inflates until it touches the walls of the cooled mould. The parison at once takes up the shape of the mould and cools. The mould is then opened and the bottle removed. 

The first step in extrusion blow molding is the formation of a molten tube called a parison. The parison is engaged between two mold halves and, after closing the mold, is inflated by using compressed air, ensuring the polymer adheres to the mold shape. The material solidifies in contact with the cold... 

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