Narrow Neck Glass Container Internal Embossment Method
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing press-and-blow glass container manufacturing process is unable to effectively create internal embossments on narrow neck glass containers due to the parallel orientation of the plunger's outer surface, which restricts the formation of external debossments necessary for internal embossments in the final product.
Innovation Solution
A method involving a blank mold with internal debossments and a plunger that forms a glass parison with external embossments, which are then stretched and transformed into internal embossments during the blow molding process using a blow mold, allowing for the creation of narrow neck glass containers with internal embossments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional press-and-blow plunger with parallel outer surface is used, then the manufacturing process is simple, but internal embossments cannot be formed on the container body
Solution Approach 1:
Instead of forming embossments directly on the plunger's outer surface (conventional approach), the invention forms debossments (recesses) on the plunger's inner surface that contact the molten glass. This inverted approach allows the glass to be pushed into the debossed areas, creating external embossments on the parison that become internal embossments after blowing, thereby resolving the contradiction between simplicity and embossment formation capability
Solution Approach 2:
The invention transitions from forming embossments in the plunger's radial dimension (outer surface) to forming them in the axial dimension (inner surface along the plunger's length). This dimensional shift enables the creation of embossment-forming features on the plunger that are compatible with narrow neck configurations, allowing internal embossments to be formed without increasing overall device complexity
2Manufacturing precision
If external debossments are provided on the plunger to form internal embossments, then internal embossments can be created, but this technique is not feasible in narrow neck operations due to parallel plunger surface orientation
Solution Approach 1:
The invention applies debossments only to specific localized areas of the plunger's inner surface where embossment formation is desired, rather than requiring the entire plunger surface to have complex geometry. This localized application of debossments maintains compatibility with narrow neck container dimensions while achieving the desired internal embossment effect in specific regions of the container body
3Manufacturing precision
If the plunger outer surface is modified to create embossments, then internal embossments can be formed, but the parallel orientation prevents effective debossment creation
Solution Approach 1:
The invention inverts the conventional embossment formation approach by creating debossments (indentations) on the plunger's inner surface instead of embossments on the outer surface. This inversion allows the molten glass to be shaped by the recessed areas, creating external embossments on the parison that transform into internal embossments during blowing, thereby achieving embossment formation capability without altering the plunger's overall parallel cylindrical shape
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
This method enables the production of narrow neck glass containers with internal embossments, achieving the desired decorative or functional features by stretching external embossments through the parison body wall during the blow molding process, resulting in a successful integration of embossments within the container body.
Implementation Method 1
Blow gas is directed through the neck finish into the parison body to stretch the parison body against the blow mold internal surface and thereby push the at least one external embossment through the wall of the parison body
Data Source
AI summary
A narrow neck glass container includes a container body and a container neck finish. The container neck finish has an external closure attachment diameter of not more than 36 mm, and the container body has at least one internal embossment of predetermined geometry. The at least one internal embossment preferably comprises a plurality of internal embossments in a geometric pattern.