Sheet Container Forming with Gas Pressure for Uniform Thickness
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Solution Overview
Problem
Existing processes struggle to deform sheet materials into complex container shapes without causing excessive thinning, leading to structural homogeneity issues and mechanical weaknesses.
Innovation Solution
A two-step forming process using distinct forming surfaces to deform the sheet, followed by gas pressure to achieve uniform thickness and shape, allowing the use of thinner materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single-step forming process is used to deform sheet material into complex container shapes, then the container can be formed efficiently, but excessive thinning occurs in various portions leading to structural inhomogeneity and mechanical weakness
Solution Approach 1:
The forming process is divided into multiple sequential steps, each with a dedicated forming member having a specific operating surface. The first forming member creates a preliminary container blank, then subsequent forming members further deform the blank into the final complex shape. This segmentation allows each step to be optimized for its specific deformation requirements, preventing excessive thinning while achieving complex geometries.
2Reliability
If thicker sheet material is used to prevent excessive thinning during forming, then structural homogeneity is maintained, but material usage increases
Solution Approach 1:
By segmenting the forming process into multiple controlled steps with progressively specialized forming members, the process can effectively utilize thinner sheet material. Each forming step is optimized to distribute deformation evenly, preventing localized excessive thinning that would otherwise require thicker starting material to compensate for.
3Manufacturing precision
If multiple forming members with different operating surfaces are used to deform the sheet in distinct steps, then structural homogeneity is improved and material usage is reduced, but device complexity increases
Solution Approach 1:
The forming device is segmented into multiple forming members, each with a specific operating surface tailored to its function. The first forming member has an operating surface designed for creating the container blank, while subsequent forming members have operating surfaces optimized for achieving the final complex shape. This segmentation enables precise control over deformation at each stage, maintaining thickness uniformity even with increased device complexity.
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
Enhances structural homogeneity, reduces material usage, and extends shelf life while enabling production of complex container shapes.
Implementation Method 1
blowing a gas under pressure into said forming cavity to deform said container blank until said container of said given shape is obtained
Data Source
AI summary
Process for obtaining a container of a given shape starting from sheet material, by providing a sheet; providing a mould having a forming cavity, which defines a reference axis (R) and has a shape corresponding to the given shape of the container; positioning the sheet over forming cavity; providing a forming device having forming structure arranged on a side of the sheet opposite the forming cavity, and operating the structure for inserting the sheet into the forming cavity to deform it until a container blank is obtained having a shape approximating the given shape; and blowing a gas under pressure into the forming cavity to deform the container blank until the container with the given shape is obtained.