Preform for manufacturing plastic container i.e. bottle, has deforming area connected to opening area, where deforming area is formed as casing guided as wave-like around longitudinal axis of preform in sections

摘要

#CMT# #/CMT# The preform (20) has an upper opening area formed as a thread with thread inner diameter, and a deforming area connected to the opening area and including a center area and a closed base area, where the preform is made of thermoplastic resin. Maximum diameter of the deforming area is smaller than or equal to the thread inner diameter. The deforming area is formed as a casing (10) guided as wave-like around a longitudinal axis of the preform in sections. Wall thickness (W) of the preform is defined by distance between an outer casing surface (12) and an inner casing surface (14). #CMT# : #/CMT# An independent claim is also included for a method for manufacturing a container. #CMT#USE : #/CMT# Preform for manufacturing a plastic container i.e. bottle. #CMT#ADVANTAGE : #/CMT# The deforming area is formed as the casing guided as wave-like around the longitudinal axis of the preform in sections, thus precisely reducing transverse stretching of the plastic material during deforming process, so that the preform is applicable for manufacturing the containers with which outer diameter is relatively large in relation to the thread inner diameter. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a horizontal sectional view of a preform transverse to a longitudinal direction. W : Wall thickness 10 : Casing 12 : Outer casing surface 14 : Inner casing surface 20 : Preform.