Absorbent Sheet Manufacturing Apparatus Particle Retention
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Solution Overview
Problem
Existing manufacturing apparatuses for absorbent articles face challenges in accurately supplying particles into sheet concave portions and maintaining them within these regions, leading to scattering due to high rotation speeds and inefficient material distribution.
Innovation Solution
A sheet article manufacturing apparatus featuring a supply cylinder with arranged concave portions, a suction mechanism to hold particles in place, and a bonding process that ensures particles are accurately deposited and held within concave portions, using rollers with matching concave and convex surfaces to form and maintain the sheet structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a high rotation speed is used for the roll to maintain productivity, then manufacturing efficiency is improved, but functional material scatters from the first sheet due to centrifugal force
Solution Approach 1:
The concave portions are formed on the roll surface before the functional material is supplied. This preliminary structuring creates predetermined retention zones that capture and hold the material in place, preventing centrifugal scattering even at high rotation speeds. The concave geometry is prepared in advance to counteract the harmful effects of high-speed rotation.
2Strength
If adhesive is applied in advance on the carrier material to enable bonding, then bonding strength is improved, but the distance between the transfer device and carrier material must be maintained above a certain value, reducing precision
Solution Approach 1:
The adhesive application step is completely removed from the process. Instead of using adhesive to bond materials, the invention relies on the mechanical interlocking provided by the concave portion structures. The concave portions on both the roll and sheet create physical retention zones that hold functional material without requiring any adhesive bonding, thereby eliminating the need for maintaining a minimum distance between devices.
3Productivity
If functional material is supplied by gravity and air blow, then supply speed is improved, but material is deposited on areas outside the concave portions, reducing precision
Solution Approach 1:
The roll surface is given non-uniform local quality through the concave portion structures. These localized depressions create specific zones with different geometric properties that selectively capture and retain functional material. The concave portions act as localized retention zones that guide and confine material placement, ensuring high-precision deposition only in the intended areas while maintaining efficient supply speeds.
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 apparatus enables precise distribution and retention of particles within the sheet concave portions, preventing scattering and ensuring a consistent, dotted pattern of absorbent material, enhancing the manufacturing efficiency and quality of absorbent sheets.
Implementation Method 1
a suction mechanism to hold particles in place
Implementation Method 2
since a rotation speed of the roll is normally high in such apparatus, scattering of the functional material from the first sheet may occur by a centrifugal force
Data Source
AI summary
In an absorbent sheet manufacturing apparatus, a first roller (31) and a third roller (51) are rotated while each first concave portion (312) faces a convex portion (512), and therefore sheet concave portion rows (913) are formed on a first sheet member (91). The first sheet member (91) is transferred from a first roller-outer side surface (311) to a cylinder-outer side surface (211) of a supply cylinder (21), and a lower portion of the cylinder-outer side surface (211) is in contact with the first sheet member (91) while supply concave portions (212) supplied with particles face the sheet concave portion rows (913). Therefore, particles can be supplied accurately into each sheet concave portion (912) included in the sheet concave portion rows (913) and be held in the sheet concave portion (912) while the particles are practically prevented from scattering to the outside of the sheet concave portion (912).