Blow Molded Bottle Extended Neck Finish Collar Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Standard blow molding equipment faces challenges in producing bottles with elongated neck finishes due to limited clearance, which prevents the conventional preform neck finish from seating properly, leading to issues with positioning and gripping, especially when trying to maintain the unoriented structure of the neck finish.
Innovation Solution
A blow molded synthetic resin bottle design featuring an elongated neck finish with a shoulder, a first collar adjacent the body, and an additional collar at the upper end, allowing for proper seating and gripping, along with a method involving injection molding of a preform with these features to accommodate existing blow molding equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the neck finish is elongated to provide proper seating and gripping surfaces, then the bottle can be properly positioned and gripped by conventional equipment, but the clearance above the mold is insufficient to accommodate the extended neck length
Solution Approach 1:
The neck finish is divided into multiple collars (first collar adjacent to the body, second collar at the upper end, and optionally a third collar intermediate between them). These segmented collars are distributed along the elongated neck finish to provide multiple positioning and gripping surfaces for conventional blow molding equipment, eliminating the need for a single long uninterrupted neck structure.
Solution Approach 2:
Instead of extending the neck finish purely in the axial direction to provide gripping surfaces, the invention distributes collars both axially and circumferentially along the neck finish. This multi-dimensional arrangement allows conventional equipment to engage multiple collars for stable positioning and gripping without requiring excessive axial clearance.
2Stability of the object's composition
If the neck finish is elongated to maintain unoriented resin structure, then the molecular orientation is preserved in the desired regions, but the limited mold clearance prevents proper seating of the preform
Solution Approach 1:
The neck finish is segmented into multiple collars that can be independently positioned within the mold cavity. The first collar seats on the outer surface of the mold to establish proper positioning, while the second collar (and optionally third collar) extends upward to provide additional gripping surfaces. This segmentation allows the preform to be accurately seated and held in position without requiring the entire neck finish to be contained within limited mold clearance.
Solution Approach 2:
The multiple collars act as intermediary elements between the preform and the mold/equipment. The first collar provides the primary seating interface on the mold outer surface, while the second collar (extending above the mold) serves as an intermediary gripping surface for carrier arms or grippers. This intermediary structure enables precise positioning and secure handling without compromising the unoriented resin structure in the elongated neck region.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables the production of bottles with extended neck finishes that can securely mate with closures and maintain unoriented resin structure, facilitating easy handling and sealing while utilizing conventional blow molding equipment.
Implementation Method 1
The preform is heated and placed in a blow mold cavity
Implementation Method 2
blow molded bottles having an elongated neck finish and to a method for making same... produced in molds by blowing a heated injection molded preform outwardly against the walls of a mold cavity
Data Source
AI summary
A blow molded synthetic resin bottle has a body and an elongated neck with the body providing a shoulder extending about the base of the neck. The neck has a first collar extending thereabout spaced adjacent the shoulder and at least one additional collar extending thereabout adjacent the upper end of the neck. The resin in the neck is substantially unoriented. To produce the bottle, a synthetic resin preform is injection molded with a generally tubular body and the elongated neck. This preform is placed in a blow mold cavity having a body receiving portion and a neck receiving portion that has a recess extending thereabout seating the first collar therein. The additional collar is disposed outwardly of the mold cavity and is disposed on the upper surface of the mold.