Method of extrusion blow-molding hollow thermoplastic bodies

Details Method of extrusion blow-molding hollow thermoplastic bodies Method of extrusion blow-molding hollow thermoplastic bodies

1992-04-06

1993-10-26

Timm, Catherine

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

Measuring a weight or volume

264 407, 264541, 425140, 425148, B29C 4904, B29C 4978

Patent

active

052563464

ABSTRACT:
Tubular bodies are extruded from thermoplastic material by forming a tubular preform at an exit of an extruder head die after which the tubular preform is then blown to the configuration of a cavity of a blow mold. The position of the preform relative to the blow mold is regulated and/or controlled, and waste portions produced in the blow mold are separated from the blown hollow body. The weight of the separated lower waste portions and/or the net weight of the hollow body when in accumulation head operation is measured in order to control and/or regulate the position of the preform and to change the die slit in the event of a weight deviation from a reference value. With respect to continuous extruder operation of an extruder head, either the hollow body net weight and the weight of the lower waste portions are measured and compared with reference values or the positions of markings relative to particularly critical cross-sectional zones are compared with present reference values to derive appropriate position control and/or regulation of the preform.

REFERENCES:
patent: 3629382 (1971-12-01), Fogelberg et al.
patent: 3795719 (1974-03-01), Morecroft et al.
patent: 4179251 (1979-12-01), Hess et al.
patent: 4338071 (1982-07-01), Daubenbuchel et al.
patent: 4382761 (1983-05-01), Daubenbuchel et al.
patent: 4444702 (1984-04-01), Thomas et al.
patent: 4869862 (1989-09-01), Bryan
patent: 5102588 (1992-04-01), Feuerherm

Affiliated with

Also associated with

Rating

Method of extrusion blow-molding hollow thermoplastic bodies does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of extrusion blow-molding hollow thermoplastic bodies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of extrusion blow-molding hollow thermoplastic bodies will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-957058