Design of Flash Pocket Inserts in an Extrusion Blow Mould Based on the Results of Numerical Simulations

The simulation was made using the model of a real blow mould with sockets to place the inserts of a different flash pocket profile shape. The simulation of the temperature change near flash pocket zone surface was made. The inserts allow testing the efficiency of polymer cooling in the flash pocket depending on the profile shape in this mould zone. As the result, the prediction of the extrusion blow moulding cycle time can be made. It was found that the most effective cooling of the plastic in the flash pocket can be achieved using the semicircular profile.