Blister Packaging Machine Thickness Balance Control
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Solution Overview
Problem
The pocket portion forming unit in blister packaging machines often unintentionally disrupts the balance between the thickness of the bottom and side portions of the pocket, leading to excessive thinning and a compromised gas barrier property, especially in the side portion.
Innovation Solution
A blister packaging machine equipped with an illumination unit, imaging unit, and controller that detects the thickness of the side portion based on transmitted image data and performs feedback control to adjust the balance between the bottom and side portion thicknesses, ensuring a stable gas barrier property.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the plug forming method is used to form pocket portions in the container film, then the gas barrier property is improved, but the manufacturing precision of pocket portion thickness balance deteriorates
Solution Approach 1:
The patent employs an imaging unit to capture images of the container film during the forming process, and a controller analyzes these images to detect the thickness of the pocket portion side walls in real-time. Based on this feedback, the controller automatically adjusts the plug forming parameters (such as plug position, pressing force, or forming speed) to maintain optimal thickness balance. This closed-loop feedback system ensures consistent gas barrier properties while preventing excessive thinning of the side walls.
2Productivity
If high-pressure air is supplied to expand the container film toward the plugs, then the forming speed is improved, but the thickness uniformity of the side portion deteriorates
Solution Approach 1:
The patent maintains continuous imaging and monitoring of the pocket portion formation process, allowing for real-time detection of thickness variations. The controller continuously adjusts the high-pressure air supply parameters (pressure, flow rate, or timing) during the expansion process to compensate for thickness non-uniformity, ensuring both high productivity and consistent side wall thickness throughout production.
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
This configuration automatically corrects any imbalance in pocket portion thickness, preventing excessive thinning and maintaining a reliable gas barrier property for a longer period, while also enabling high-speed production and reducing content waste.
Implementation Method 1
an illumination unit placed downstream of the pocket portion forming unit and configured to irradiate at least the pocket portion with predetermined electromagnetic radiation; an imaging unit placed on a side opposite to the illumination unit across the container film and configured to obtain at least transmitted image data based on the electromagnetic radiation transmitted through the pocket portion
Implementation Method 2
The plate-type pressure forming method sandwiches a heated and softened container film between a first mold having recesses in a shape corresponding to the pocket portions and a second mold having holes for the air supply
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
There is provided a blister packaging machine that more reliably forms pocket portions having good gas barrier property for a longer time period. A PTP packaging machine (11) includes a pocket portion forming device (16) configured to form pocket portions (2), each having a bottom portion and a side portion, in a belt-like container film (3); an illumination device (50) placed downstream of the pocket portion forming device (16) and configured to irradiate at least the pocket portions (2) with predetermined electromagnetic radiation; a camera (51) configured to obtain at least transmitted image data based on the electromagnetic radiation transmitted through the pocket portions (2); and a side portion state detector (52) configured to detect a state with regard to thickness of the side portion, based on the transmitted image data obtained by the camera (51). The pocket portion forming device (16) is configured to adjust balance between the thickness of the bottom portion and the thickness of the side portion. The operation of the pocket portion forming device (16) is controlled, based on a result of detection by the side portion state detector (52).