Pivoting Cradle Lugs for High-Speed Beverage Container Loading
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Solution Overview
Problem
High-speed commercial packaging machines face challenges in loading large, heavy beverage containers like mini-kegs and two-liter soft drink containers into paperboard cartons without damaging them, due to their size, weight, and fragility, especially during reorientation and insertion.
Innovation Solution
A packaging machine system that includes an infeed conveyor, starwheel, metering and transfer belt, and pivotally connected cradle lugs to gently reorient and space containers from upright to side orientation, using cradle lugs and pusher arms to insert them into cartons without contact, ensuring secure handling and preventing tipping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If large heavy containers are moved at high speeds through the packaging machine, then productivity is improved, but the containers develop more momentum and are more difficult to stop or change direction without damaging their walls
Solution Approach 1:
The system performs preliminary reorientation of containers from upright to horizontal position before the insertion station. The transfer flight with pivotally connected cradle lugs pre-positions containers horizontally, so that when they reach the insertion station, they are already in the correct orientation for loading, eliminating the need for abrupt stopping or direction changes at high speed
Solution Approach 2:
The transfer flight acts as an intermediary mechanism between the infeed conveyor and the insertion station. It provides a transition zone where containers can be gently reoriented from vertical to horizontal position through pivotally connected cradle lugs, serving as a buffer that prevents direct impact and momentum-related damage at the insertion point
2Productivity
If containers are reoriented from upright to sideways orientation at high speed, then packaging efficiency is improved, but the containers may tip over or become displaced during the reorientation process
Solution Approach 1:
The system performs the reorientation action in advance at a controlled location before the insertion station. By pre-rotating containers to horizontal position on the transfer flight, the system eliminates the need for abrupt reorientation at high speed, thereby maintaining container stability while still achieving efficient packaging
Solution Approach 2:
The cradle lugs are designed to be pivotally connected to the transfer flight chains, allowing dynamic adjustment of container orientation. This pivotal connection enables smooth transition from vertical to horizontal position through controlled rotation, maintaining container stability during the reorientation process while adapting to the motion requirements of the packaging machine
3Productivity
If containers are pushed into cartons using conventional methods, then loading speed is improved, but the fragile walls of large containers are more susceptible to puncturing or damage
Solution Approach 1:
The transfer flight with cradle lugs serves as an intermediary protective mechanism that gently handles containers during the loading process. By supporting containers horizontally on the transfer flight and using pusher arms that extend progressively, the system avoids direct impact and abrupt forces that could puncture or damage the fragile container walls, while still maintaining high loading speed
Data Source
AI summary
A large container loading system and method for a packaging machine includes an infeed conveyor and a transfer flight. An array of pivotable cradle lugs is carried by the transfer flight in synchronized movement with cartons on an adjacent carton flight. Containers are moved into the cradle lugs in an upright orientation and the cradle lugs and containers are reoriented to a substantially horizontal or sideways orientation before being pushed into their cartons by an inserter assembly. A transfer block or a support conveyor may be positioned between each of the cradle lugs and an aligned open container to support a container as it moves between a cradle lug and a carton.