Neck Ring Holder with Radial and Rotational Sectors
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Solution Overview
Problem
Existing glass container production technologies, such as 'press', 'press-and-blow', and 'blow-and-blow', cannot efficiently produce containers with transverse sizes equal to or greater than their height and a threaded mouth, while achieving thin wall thicknesses for cosmetics jars, resulting in high wall thickness and weight/capacity ratios greater than 2 g/cm³.
Innovation Solution
A neck ring holder device with circumferential sectors that can move radially and rotate to open, allowing for the formation of containers with thin walls and threaded mouths, using 'press-and-blow' or 'blow-and-blow' technologies, avoiding interference with the shoulder portions of the container.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If 'press' technology is used to produce glass containers with large mouth, then the container can be formed directly with the definitive shape, but the wall thickness becomes too thick (greater than 2 mm) and weight/capacity ratio exceeds 2 g/cm³
Solution Approach 1:
The forming process is divided into two separate operations: first forming a parison with a piston, then blowing it into the final container shape. This segmentation allows the mouth size to be determined by the piston while the final wall thickness is controlled by the blowing process, enabling thin walls without compromising manufacturing capability.
Solution Approach 2:
The invention introduces a movable neck ring that can open and close dynamically during the forming process. The neck ring remains closed during pressing to contain the molten glass, then opens to allow the parison to be blown into the final shape, enabling the transition from thick-walled intermediate form to thin-walled final product.
2Weight of moving object
If 'press-and-blow' technology is used to produce containers with thin walls, then the weight/capacity ratio is reduced, but the neck ring interference with shoulder portions prevents proper forming of containers with transverse size greater than height
Solution Approach 1:
The neck ring is designed to be movable rather than fixed, capable of opening and closing during the forming process. This dynamic behavior allows the neck ring to clear the shoulder portions during the blowing phase while maintaining its containment function during pressing, thus enabling production of containers with various aspect ratios including those with transverse size greater than height.
Solution Approach 2:
The neck ring is divided into multiple separable sectors that can move independently. This segmentation allows the sectors to spread apart and clear the shoulder portions of containers with specific geometries, while still forming a complete ring during the pressing operation to properly contain the molten glass.
3Device complexity
If neck ring sectors are moved radially outward to open, then the opening mechanism is simplified, but interference with shoulder portions of the container occurs
Solution Approach 1:
Instead of moving the neck ring sectors purely radially outward in a single dimension, the invention introduces motion in multiple dimensions: radial movement combined with rotation about the container axis. This multi-dimensional motion path allows the sectors to clear the shoulder portions without requiring excessive radial displacement that would cause interference.
Solution Approach 2:
The neck ring sectors are designed with asymmetric geometry where the outer diameter varies around the circumference. This asymmetry allows certain portions of the sectors to clear the shoulder portions of the container during opening, while other portions maintain the necessary structural integrity and containment function.
4Object-affected harmful factors
If neck ring sectors are rotated to open, then interference with shoulder portions is avoided, but the opening mechanism becomes more complex
Solution Approach 1:
The invention combines radial movement and rotation into a single integrated opening mechanism. The neck ring sectors move radially outward while simultaneously rotating about the container axis, achieving both interference avoidance and mechanism simplicity through combined motion rather than separate sequential movements.
Solution Approach 2:
The opening mechanism is designed to provide dynamic, multi-degree-of-freedom motion to the neck ring sectors. Rather than simple radial translation or fixed-axis rotation, the sectors undergo coupled radial and rotational movement that adapts to the container geometry and avoids interference while maintaining mechanical simplicity.
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 glass containers with thin walls and threaded mouths, achieving weight/capacity ratios below 2 g/cm³, specifically up to 0.5 g/cm³, and simplifies the opening mechanism of the neck ring, preventing interference with the container's shoulder portions.
Implementation Method 1
wherein said glass body is supported in the mould by means of a neck ring that can be opened, suitable for realization of the mouth of the container and consisting of a plurality of circumferential sectors that can be moved away from each other, the method further comprising a step of opening the neck ring at the end of the mould forming step
Data Source
Figure 1a~1h
Figure 2~4
Figure 5~6
AI summary
A neck ring holder device intended to be used at a mould for forming glass containers (30), wherein the neck ring (41) for realizing the mouth (32) of the container can be opened and consists of a plurality of circumferential sectors (44) that can be moved apart from a closed position of the neck ring (41), in which the circumferential sectors (44) are coplanar and form a substantially continuous annular element, up to an open position of the neck ring (41), in which the circumferential sectors (44) are rotated out of said coplanar configuration, moving away from each other, about axes directed perpendicular to the direction of the axis (45) of said annular element, is characterised in that the movement of the circumferential sectors (44) from the closed position to the open position consists of the composition of a first radial translation movement, in said coplanar configuration, of each circumferential sector (44) moving away from the axis (45) of said annular element, and of a second rotation movement of each circumferential sector (44) around a respective axis (46) directed perpendicular to the direction of the axis (45) of said annular element.