Inline Gas Pressure Testing for Bag Compartment Quality
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Solution Overview
Problem
Current gas pressure testing devices are not available for inline testing of gas pressure in gas compartment portions of bags during the gas filling process, leading to production of defective articles due to pressure deviations from the predetermined range.
Innovation Solution
A gas pressure testing device comprising a measuring unit with a pressing member, receiving member, support member, and distance sensor, which is integrated into the bag conveying path to measure and control gas pressure in real-time, ensuring it remains within a preset range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If gas pressure testing is not conducted inline during bag conveying, then the production process continues without interruption, but defective bags with incorrect gas pressure are produced and cannot be eliminated immediately
Solution Approach 1:
The patent implements a feedback mechanism by installing a pressure sensor that continuously monitors gas pressure in the gas compartment portion during bag conveying. The sensor provides real-time pressure data to a control unit, which compares the measured pressure against predetermined specifications. When pressure deviations are detected, the system immediately signals for bag rejection, enabling continuous production while maintaining quality through closed-loop feedback control.
Solution Approach 2:
The patent performs gas pressure testing as a preliminary action during the bag conveying process, before defective bags are finalized or shipped. By measuring pressure inline while bags are being conveyed, the system identifies and eliminates defective bags proactively, preventing quality issues from reaching the customer while maintaining continuous production flow.
2Reliability
If gas pressure testing equipment is installed for inline measurement, then defective articles can be eliminated immediately, but the device complexity increases
Solution Approach 1:
The patent extracts the gas pressure measurement function from complex testing equipment and implements it using a simple pressure sensor integrated into the existing bag conveying system. By separating the measurement function from mechanical testing apparatus, the system achieves reliable inline detection without adding significant structural complexity. The pressure sensor is positioned to contact the gas compartment portion directly during conveying, eliminating the need for separate testing stations or complex mechanisms.
3Manufacturing precision
If various injection conditions are precisely adjusted through numerous experiments, then gas pressure can be maintained within predetermined range, but time and resources are consumed in advance experimentation
Solution Approach 1:
The patent replaces extensive mechanical experimentation and manual adjustment of injection conditions with an electronic sensing and control system. The pressure sensor provides real-time feedback that enables automatic adjustment of gas injection parameters, eliminating the need for numerous manual experiments. The control unit processes sensor data and adjusts injection timing, pressure, and duration automatically, achieving precise gas pressure control while dramatically reducing the time and resources required for calibration.
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
Enables immediate detection and elimination of defective bags with incorrect gas pressure, minimizing defective products by adjusting gas injection conditions, and ensuring consistent bag quality.
Implementation Method 1
a distance sensor which is disposed on the rear side of the pressing member and is moved forward and backward together with the support member by the drive source and measures the distance to the pressing member
Data Source
AI summary
A gas pressure testing device, which is for checking pressure of gas inside the gas compartment portion of a bag, including: a pressing member (31) disposed on one side of the bag, a receiving member (38) positioned on another side of the bag, and a movable support member (39) having thereon the pressing member and a distance sensor (32). The pressing member being kept urged toward the gas compartment portion by air cylinder (44) is moved toward the bag so that the gas compartment portion is sandwiched by the pressing member and the receiving member. The distance sensor measures the distance (D) at such time to the pressing member and sends a distance signal to a control unit (37). Based on the distance signal, the control unit determines whether or not the gas pressure in the gas compartment portion is within a preset range.