Bulk Container Bag Liner Bottom Attachment Mechanism
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Solution Overview
Problem
Conventional bulk containers face issues with plastic bag liners getting caught in processing equipment during dumping, leading to contamination, capacity loss, and container failure due to improper orientation and attachment, resulting in significant product loss and downtime.
Innovation Solution
Securing the bottom of the plastic bag liner to the container using die-cut self-locking features such as holes and slits, ensuring the bag remains in place during inversion and filling, preventing contamination and rupture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the plastic bag liner is made to extend beyond the depth of the container and draped over the sides, then the bag can be prevented from falling into the vat, but the bag still follows the product out of the container and can extend into the vat causing contamination
Solution Approach 1:
The bag liner is pre-attached to the container bottom before filling, ensuring it remains in place during inversion and dumping. This preliminary attachment prevents the bag from following the product out of the container while still allowing proper product discharge.
Solution Approach 2:
The attachment system is divided into discrete attachment points distributed across the container bottom. This segmentation allows the bag to be securely held at multiple locations, preventing it from being pulled out during dumping while maintaining proper product flow.
2Quantity of substance
If the bag is not properly opened and oriented within the container prior to filling, then capacity is reduced and void areas form, but the bag can be stretched to the point of rupture causing product leakage and container failure
Solution Approach 1:
The bag liner is pre-positioned and pre-attached to the container bottom before the filling process. This ensures the bag is properly oriented and opened in advance, eliminating void areas and preventing over-stretching during filling that would lead to rupture.
Solution Approach 2:
The attachment system provides localized support at specific points across the container bottom, allowing the bag to maintain proper tension and orientation in different areas. This prevents localized over-stretching that could lead to rupture while ensuring uniform filling capacity.
3Reliability
If conventional attachment methods are used, then the bag can be secured to the container, but the attachment process is complex and time-consuming
Solution Approach 1:
The bag attachment system is designed to be self-securing through pre-formed attachment features on both the bag and container. The bag automatically attaches to the container bottom when positioned, eliminating the need for complex external attachment mechanisms or time-consuming manual processes.
Solution Approach 2:
The attachment functionality is extracted from complex external mechanisms and integrated directly into the bag and container structures themselves. This simplification reduces the overall system complexity while maintaining secure attachment through dedicated attachment points built into the components.
Data Source
AI summary
A bulk container for shipping product in bulk from one location to another location, wherein the container has a sidewall with a top end and a bottom end, a bottom closure at the bottom end of the sidewall closing the bottom end of the container, a bag liner in the container, and attaching structure on the bottom closure for attaching the bottom end of the bag liner to the bottom end of the container so that the bag liner remains in the container when the container is inverted and product is dumped from the container.