| 摘要 |
<p>Method for the production of parisons of thermoplastic material, comprising the phases of injection of plasticized resin into a plurality of multiple-cavity moulds, removal of said parisons (13) from the respective injection moulds and transfer of the same parisons on to conditioning stations for these to go through a temperature conditioning phase, dwelling of said parisons in said conditioning stations (14) for a pre-determined length of time, transfer of said parisons into appropriate blow moulding tools, and blow moulding of said conditioned parisons, wherein during said conditioning phase the temperature of the surface (10) underneath the collar (11) of the parison is caused to increase, while the temperature of the parison body (12) is allowed to decrease, so that at the end of said conditioning phase the temperature of the surface (10) underneath the collar of the parison exceeds by approx. 15 to 20 DEG C the temperature of the body (12) thereof. In a preferred manner, after the temperature conditioning phase, and before the subsequent blow moulding phase, there is provided a temperature balancing phase (17) for allowing the temperature of the parisons to evenly spread throughout the parisons by letting them dwell in still ambient air conditions. <IMAGE></p> |
