Patent ID: 6605247
Filing Date: 2003-08-12
Classification: B29C,B29L

Abstract:
A blow molding process comprising:(a) providing (i) a mold part having a mold face and an opening extending through the mold part which is hereafter denoted as a mold opening, the mold opening having an end at the mold face, (ii) a sleeve having an end and slidably received in the mold opening, and (iii) a pin having an end and fixedly positioned relative to the mold part so as to extend through the sleeve and beyond the mold opening end with the pin end spaced therefrom outside of the mold opening; (b) positioning the sleeve in an extended position with the sleeve end substantially flush with the pin end; (c) initiating blow molding of a molten parison with respect to the mold face and sleeve in its extended position; and (d) retracting the sleeve to a retracted position, in which the pin extends beyond the sleeve end with the pin end spaced therefrom outside of the sleeve, at a predetermined delay time after (c), at which time the parison is still sufficiently molten to allow a portion of the parison to form around that portion of the pin extending beyond the sleeve end.