Blow Formed Metal Container Seam Integrity
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Solution Overview
Problem
The complexity of clamping systems in existing blow forming apparatuses for metal containers reduces operational flexibility, making it difficult to produce small batch sizes and varying container sizes and forms, particularly for price-sensitive customers.
Innovation Solution
A simplified blow forming process using precontainers with pinched and kinked seams to maintain seam integrity, reducing the need for complex clamping systems and allowing for higher seam tightness, which prevents unrolling and leaking during the blow forming process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complicated clamping system is used to maintain seam integrity during blow forming, then seam reliability is improved, but device complexity increases and operational flexibility decreases
Solution Approach 1:
The seam is pinched and kinked during the seaming operation before blow forming takes place. This preliminary action creates a mechanically locked seam structure that maintains integrity during subsequent blow forming without requiring complex clamping systems during the forming process.
Solution Approach 2:
The seam structure itself provides the locking mechanism through its own geometry. The kinked and pinched seam creates a self-locking structure where the body hook and component hook interlock, making the seam self-sufficient for maintaining integrity without external clamping assistance.
2Reliability
If a complicated clamping system is used to prevent seam unrolling, then production reliability is improved, but productivity decreases due to longer cycle times
Solution Approach 1:
The seam is pinched and kinked during the seaming operation before blow forming takes place. This preliminary action creates a mechanically locked seam structure that maintains integrity during subsequent blow forming without requiring complex clamping systems during the forming process.
Solution Approach 2:
By pre-locking the seam through pinching and kinking, the process skips the need for prolonged clamping during blow forming. The seam maintains its integrity throughout the blow forming operation, allowing the process to move quickly through the forming stage without interruption for seam protection.
3Manufacturing precision
If a complicated clamping system is used to maintain seam integrity, then seam tightness is improved, but adaptability for different container sizes and forms decreases
Solution Approach 1:
The seam is pinched and kinked during the seaming operation before blow forming takes place. This preliminary action creates a mechanically locked seam structure that maintains integrity during subsequent blow forming without requiring complex clamping systems during the forming process.
Solution Approach 2:
The invention changes the seam structure parameters by creating a kinked and pinched configuration with specific geometric features. This structural parameter change allows the seam to maintain tightness across different container sizes and forms without requiring adjustment of complex clamping systems, as the self-locking geometry adapts to various dimensions.
Data Source
Figure 1A~1B
Figure 2A~2C
Figure 3~7B
AI summary
The invention relates to metal precontainer for blow forming into a blow formed container comprising a cylindrical body, an upper component having an opening, and a lower component, wherein the upper component and/or the lower component are connected to the cylindrical body by a seam comprising a component hook, a body hook and means for locking the body hook to the component hook, to a container blow formed and to an apparatus and process for blow forming the precontainer in to the container.