Preform handling device, and blow forming device

Abstract

A preform handling device (100) in which preforms (10), which have a flange (13) protruding outward at a position that is away from the opening edge surface (11A) of a mouth part (11), are continuously supplied in a row along a chute (20) while the preforms (10) are inverted so that the opening edge surfaces face downward has: a star wheel (110) which rotates and transfers the preforms from an upstream region (USR) to a downstream region (DSR) by pushing an area above the flange as a consequence of the preforms being supplied to multiple notched parts (112) formed on the outer circumferential edge of a wheel that is rotated; an edge surface guiding member (115) which is disposed below a preform transfer path on the upstream region and which supports and guides the opening edge surfaces of the preforms pushed by means of the star wheel; and a pair of flange guiding members (116A, 116B) which is disposed on both ends of a preform transfer path on the downstream region and which supports and guides the lower surface of the flange of the preforms pushed by means of the start wheel.

Description

technical field [0001] The present invention relates to a preform handling device, a blow molding device, and the like. Background technique [0002] As synthetic resin containers, there are known narrow-mouthed containers such as PET (polyethylene terephthalate) bottles, which are widely used in common beverage containers, and the outer diameter of the mouth relative to the outer diameter of the trunk. A wide-mouthed container with a relatively large diameter ratio and a mouth outer diameter of, for example, 43 mm or more. The wide-mouth container is easy to take out the filling, so the filling is not limited to liquids, and it is often used as a container for solids such as jam. These narrow and wide mouth containers are formed by blow molding narrow or wide mouth preforms designed to match their final shape. [0003] Such a preform is continuously supplied to a blow molding device, a mouth crystallization device, etc. along an inclined guide path (chute) by the weight o...

AI Technical Summary

Problems solved by technology

If the size of the notch of the star wheel is increased, the gap between the supported surface of the preform and the rib flange will become larger, and if the protrusion amount of the flange is small, the flange will fall out of the groove, etc. Stable supply of preforms is hindered

In particular, it is difficult to stably supply structures such as wide-mouth preforms in which the supported area is narrow and the protrusion amount of the flange is small.

Images