Hooding Machine Gripper Air Nozzle Integration
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Solution Overview
Problem
Existing hooding machines face challenges in rapidly and effectively inserting heat-shrinkable film hoods onto packages, often resulting in unsatisfactory heat-shrunk quality due to limited air flow and nozzle size issues, which can cause puckering and irregularities, especially with fast-paced packaging operations like glass bottles, and may lead to film melting and packaging defects.
Innovation Solution
A hooding machine with vertically sliding frames and grippers equipped with air nozzles integrated directly into the grippers to inflate the film hood during insertion, allowing for improved air flow and stable hood placement, along with a protective frame to prevent heat contact and a heat-shrinking frame for uniform film shrinkage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If small nozzles are used to introduce air into the hood during insertion, then the hood can be inserted without excessive rubbing, but the air flow is limited and does not produce satisfactory results
Solution Approach 1:
The air introduction system is segmented into multiple nozzles distributed along the base of the machine, allowing air to be introduced at multiple locations simultaneously. This segmentation enables both adequate air flow quantity and proper hood insertion by distributing the air flow across different zones of the hood.
2Quantity of substance
If larger nozzles are used to increase air flow, then more air can be introduced into the hood, but the nozzles hinder the insertion and heat-shrinkage operations
Solution Approach 1:
The air nozzles are positioned in the horizontal plane at the base of the machine, introducing air laterally into the hood during its vertical insertion movement. This dimensional arrangement allows adequate air flow without the nozzles physically obstructing the vertical path of hood insertion or the subsequent heat-shrinkage operations.
3Object-affected harmful factors
If the hooding operation is executed slowly to maintain film temperature, then film melting is prevented, but processing speed decreases
Solution Approach 1:
Air is introduced into the hood preliminarily during the insertion phase to establish proper positioning and temperature distribution before the heat-shrinkage cycle begins. This preliminary air introduction prevents excessive heat concentration that could cause film melting, while allowing the subsequent heat-shrinkage to proceed rapidly without causing defects.
4Productivity
If the machine operates at high speed to meet production requirements, then productivity increases, but the aesthetic quality of the heat-shrunk hood deteriorates with puckers and irregularities
Solution Approach 1:
The air introduction system operates continuously during the hood insertion and initial positioning phases, maintaining continuous air flow that prevents film cooling and irregularities. This continuous action ensures proper hood formation and temperature distribution, enabling high-speed operation while maintaining aesthetic quality without puckers or bumps.
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 machine achieves faster and more reliable hood insertion with improved aesthetic quality, reduced packaging defects, and lower power consumption, while preventing film melting and ensuring consistent heat-shrinkage without compromising processing speed.
Implementation Method 1
grippers (37) with means for gripping the edge of the hood (12) and for emitting air into the hood (12)
Implementation Method 2
The film is then heated in order to cause heat-shrinking thereof around the package
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
A hooding machine (10) for an object (14) comprises a fitting unit (13) which is able to fit a hood of heat-shrinkable film with its open end over an object which is positioned in a hooding zone (15) of the machine. The fitting unit comprises grippers (37) for gripping the edge of the said open end of the hood and air blowing nozzles (59) which are directly positioned on these grippers so as to blow air into the hood at least during operation of the fitting unit.