Plastic Bag Opening Mechanism for Complete Inlet Separation
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Solution Overview
Problem
Existing plastic bag opening devices face challenges in completely opening the inlet due to frictional force and static electricity, leading to reduced capacity utilization and increased packaging failures.
Innovation Solution
A plastic bag opening device that includes a lifter to adhere and lift the bag, an air blower to inject air at a specific angle to separate the bag surfaces, and rotating and expanding mechanisms to fully open the inlet.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If only adherence pads are used to open the plastic bag inlet, then the device structure remains simple, but the inlet cannot be completely opened due to frictional force and static electricity
Solution Approach 1:
The opening mechanism is segmented into multiple functional components: adherence pads for initial attachment, air blower for overcoming friction and static electricity, and movable member for mechanical separation. This segmentation allows each component to address specific aspects of the opening problem, achieving complete inlet opening while maintaining reasonable structural complexity
Solution Approach 2:
Air is introduced as an intermediary substance between the adherence pads and the plastic bag surfaces. The air blower injects air into the contact area to reduce frictional force and counteract static electricity, enabling the adherence pads to effectively separate the bag surfaces without direct mechanical force alone
2Productivity
If the inlet of the plastic bag is not completely opened, then capacity utilization is reduced and packaging failures occur, but adding more complex mechanisms increases device complexity
Solution Approach 1:
The device employs dynamic control of the movable member that moves between the adherence pads, creating a progressive opening action. This dynamic mechanism ensures complete inlet opening for maximum capacity utilization while avoiding the need for overly complex static structures through controlled motion sequences
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
The device effectively opens the plastic bag inlet, enhancing capacity utilization and preventing packaging defects by ensuring complete opening.
Implementation Method 1
an air blower that injects air toward the inlet of the plastic bag adhered to the lifter so that the inlet of the plastic bag is opened
Implementation Method 2
a lifter that lifts the plastic bag in a state in which a first surface of the plastic bag is adhered
Data Source
AI summary
A plastic bag opening device, which opens an inlet of a plastic bag having a pocket shape, includes an elevating member that lifts the plastic bag in a state in which a first surface of the plastic bag is adhered; and an air blower that injects air toward the inlet of the plastic bag adhered to the elevating member so that the inlet of the plastic bag is opened. Accordingly, the inlet of the plastic bag may be completely opened.