Glass Container Inner Surface Shaping via Plunger Unevenness Forming
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The one-press manufacturing method for glass containers faces challenges in forming uneven shapes on the inner peripheral surface, leading to issues with storing materials like cosmetics, where the inner diameter of the mouth portion is equal to the main body, causing difficulties in removing contents and forming anti-slip protrusions, and the existing methods struggle with forming accurate and durable uneven shapes due to temperature-related limitations.
Innovation Solution
A one-press manufacturing method that uses a plunger with unevenness forming members to create desired shapes on the inner surface by pressing these members against the gob, allowing for the formation of convex or concave shapes that are maintained during cooling, effectively preventing material from falling out when the container is inverted.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If air is blown into the parison to mold it in the finishing mold, then the glass container can be formed, but the inner diameter of the mouth portion becomes larger than the inner diameter of the main body
Solution Approach 1:
The plunger is designed with an unevenness forming member that protrudes before the molding process. This preliminary structure is inserted into the gob and pressed against the inner peripheral surface to form convex shapes, which will later prevent material from falling out when the container is inverted.
Solution Approach 2:
Instead of using a conventional plunger that simply presses the gob to form a smooth inner surface, the invention inverts the approach by using a plunger with protruding unevenness forming members that create convex shapes on the inner surface. This inversion of the molding approach solves the problem of material retention.
2Shape
If the surface of the glass container comes into contact with the finishing mold during molding, then the glass container can be formed, but unevenness or marks remain on the surface
Solution Approach 1:
The plunger acts as an intermediary tool between the finishing mold and the gob. Instead of the gob directly contacting the finishing mold surface, the plunger with its unevenness forming member is inserted first, and then pressed against the gob to transfer the desired convex shapes. This intermediary approach allows precise control over the inner surface geometry without being constrained by the finishing mold's surface quality.
3Ease of operation
If the inner diameter of the mouth portion is made equal to the inner diameter of the main body by increasing wall thickness, then contents can be easily taken out, but the manufacturing complexity increases
Solution Approach 1:
Instead of uniformly increasing the wall thickness throughout the entire container, the invention applies local quality changes by forming convex shapes only at specific locations on the inner peripheral surface where material retention is a problem. The plunger with unevenness forming members creates localized protrusions that prevent material from falling out, while the rest of the container maintains its original uniform thickness profile.
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 glass containers with evenly shaped inner surfaces that prevent material from falling out when inverted, while allowing for the creation of visually appealing and functional uneven designs, enhancing the container's usability and aesthetic appeal.
Implementation Method 1
a step of forming a glass container having a finished shape, which includes an uneven shape on an inner peripheral surface thereof, by pressing the unevenness forming member against the surface of the gob, which comes into contact with the unevenness forming member, to the outside from the inside of the plunger
Implementation Method 2
a step of transporting the glass container having a finished shape, which includes the uneven shape on inner peripheral surface thereof, to a cooling mold and cooling the glass container having a finished shape
Data Source
AI summary
There are provided a one-press manufacturing method for a glass container that can form uneven shapes on an inner peripheral surface of a glass container and a glass container that is obtained by the one-press manufacturing method.The one-press manufacturing method for a glass container includes the following steps (A) to (E);(A) a step of putting a gob in a pressing mold and then inserting a plunger, which includes an unevenness forming member provided so as to be capable of being received in the plunger, into the gob while the unevenness forming member is received in the plunger,(B) a step of forming a glass container having a finished shape, which includes an uneven shape on an inner peripheral surface thereof, by pressing the unevenness forming member against the surface of the gob, which comes into contact with the unevenness forming member, to the outside from the inside of the plunger,(C) a step of receiving the unevenness forming member in the plunger,(D) a step of extracting the plunger, in which the unevenness forming member is received, from the glass container having a finished shape that includes the uneven shape on the inner peripheral surface thereof, and(E) a step of transporting the glass container having a finished shape, which includes the uneven shape on the inner peripheral surface thereof, to a cooling mold and cooling the glass container having a finished shape.