Large Plastic Waste Water Container Segmented Blow Molding
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Solution Overview
Problem
Existing methods for producing large-volume plastic containers, such as waste water containers, are limited by the dimensions achievable through injection molding, leading to high production costs and the need for liquid-tight joining techniques that are expensive and complex, especially when producing containers with capacities between 2000 and 10000 liters.
Innovation Solution
A plastic container design featuring an upper and lower part connected by integrally formed L and U sections with clamping devices that provide a stable liquid seal, allowing for production by blow molding, rotational molding, or thermoforming, which reduces production costs and complexity while ensuring a high-quality seal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If injection molding is used to produce large-volume containers, then manufacturing precision and structural complexity are improved, but production costs and device complexity increase significantly
Solution Approach 1:
The container is divided into two separate container parts that are produced independently and then joined together using clamping devices. This segmentation allows each part to be manufactured using simpler, more economical processes while maintaining high production quality, avoiding the need for complex injection molding of entire large-volume containers.
Solution Approach 2:
Clamping devices with L-sections and U-sections serve as intermediary elements to join the two container parts. These intermediaries provide a reliable sealing connection without requiring complex injection molding techniques, thereby reducing production complexity while maintaining manufacturing precision.
2Volume of stationary object
If two identically large container parts are produced and joined, then container capacity is achieved, but production costs and joining complexity increase
Solution Approach 1:
The large-volume container is segmented into two parts of different sizes (first container part and second container part). This allows the container to achieve large capacity while using smaller, more economical production processes for each part, reducing overall production costs compared to manufacturing two identically large parts.
Solution Approach 2:
The clamping devices are strategically positioned at specific locations (flanges) on the container parts to provide sealing and connection. This localized approach to joining ensures the necessary liquid-tight seal for large capacity while minimizing the complexity and cost of the joining process compared to comprehensive joining techniques.
3Reliability
If liquid-tight joining techniques are used for large containers, then sealing quality is improved, but production costs increase
Solution Approach 1:
The clamping devices with integrated L-sections and U-sections act as intermediary sealing elements that provide reliable liquid-tight connections. This intermediary approach achieves high sealing quality through simple mechanical clamping rather than expensive liquid-tight joining techniques, significantly reducing production costs while maintaining reliability.
Solution Approach 2:
The clamping devices themselves create the sealing function through their geometric design (L-section engaging with U-section). The sealing capability is built into the clamping mechanism, eliminating the need for separate, expensive liquid-tight joining processes and reducing overall production costs while ensuring reliable sealing.
Data Source
AI summary
A container made of plastic and having a receiving volume of 2000 to 10000 liters comprises an upper container part and a lower container part and at least one clamping device which connects the two container parts in a sealing manner. Further, a plastic blow molding process is described, which serves to produce the container.