Method for manufacturing facemasks in a production line
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Solution Overview
Problem
Current facemask production lines are unable to meet the high demand for protective facemasks during pandemics due to limitations in technology and equipment, capable of producing only about 100 facemasks per minute, whereas up to 1.5 million are needed daily, necessitating a method for high-speed manufacturing.
Innovation Solution
An automated method and system for manufacturing facemasks from a textile web, involving conveying the web along a machine direction, attaching ties using ultrasonic bonding, and cutting to form facemasks at a rate of 200 to 700 facemasks per minute, without rotating the web or facemasks prior to tie attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If current manual and automated methods are used to rotate rectangular bodies and attach ties, then facemasks can be manufactured with proper tie attachment, but production speed is limited to about 100 facemasks per minute
Solution Approach 1:
The patent replaces manual rotation and tie-attachment operations with an automated printing system that directly prints ties onto the web in the machine direction. This substitution of mechanical assembly operations with a printing process enables high-speed production at 200-700 facemasks per minute while maintaining proper tie attachment to the filter material
Solution Approach 2:
The invention changes the orientation parameter by eliminating the 90-degree rotation step. Instead of rotating rectangular bodies perpendicular to the machine direction, the system maintains the web in the machine direction and prints ties along its length, fundamentally changing the geometric parameter of tie orientation from cross-machine to machine direction
2Productivity
If the web is rotated 90 degrees before tie attachment, then ties can be attached perpendicular to the machine direction, but production speed decreases significantly
Solution Approach 1:
Instead of rotating the web to attach ties perpendicular to the machine direction, the invention inverts the approach by attaching ties parallel to the machine direction through direct printing. This inversion of the traditional orientation approach eliminates the rotation step and enables continuous high-speed production
3Reliability
If stockpiles are maintained for emergency facemask supply, then immediate availability during pandemics is ensured, but storage costs and expiration monitoring become extremely expensive
Solution Approach 1:
The patent enables preliminary preparation of the web material with printed ties that can be rapidly converted into finished facemasks when needed. The system pre-configures the production line with tie-printing capabilities, allowing rapid response to pandemics without maintaining large physical stockpiles, thus reducing storage costs while ensuring availability
Solution Approach 2:
The invention transforms the static stockpile model into a dynamic on-demand production model. The production line can rapidly scale output based on actual demand, producing facemasks as needed rather than maintaining fixed inventory levels, thereby reducing storage costs and expiration waste
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 method enables the production of facemasks at a significantly higher rate, potentially meeting the demand for up to 1.5 million per day by increasing throughput to 200-700 facemasks per minute, addressing the existing capacity constraints.
Implementation Method 1
attaching ties using ultrasonic bonding
Data Source
Figure 1
Figure 2A~2D
Figure 3
AI summary
An automated system (10) and method (200) for the manufacture of facemasks (70) from a web (12) of a textile product in a production line is provided. The web (12) is conveyed in the production line along a machine direction (14, 22). A first tie (26, 46) is attached at a tie attaching station (54) to the web (12) of the textile product, such that the first tie (26, 46) extends from the web (12) in a cross-machine direction (14, 22) perpendicular to the machine direction (14, 22). The web (12) and first tie (26, 46) are cut at a cutting station (58) in the cross-machine direction (14, 22) across a width (47, 49) of the web (12) in the cross-machine direction (14, 22) to form a facemask (70) separate from the web (12). An automated system (10) and method (200) for the manufacture of facemasks (70) from a web (12) of a textile product in a production line is provided. The web (12) is conveyed in the production line along a machine direction (14, 22). A first tie (26, 46) is attached at a tie attaching station (54) to the web (12) of the textile product, such that the first tie (26, 46) extends from the web (12) in a cross-machine direction (14, 22) perpendicular to the machine direction (14, 22). The web (12) and first tie (26, 46) are cut at a cutting station (58) in the cross-machine direction (14, 22) across a width (47, 49) of the web (12) in the cross-machine direction (14, 22) to form a facemask (70) separate from the web (12).