PLA Fiber Filter Rod Cutter Structure for Crystallization and Adhesion
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Solution Overview
Problem
Existing cutter structures for polylactic acid fiber filter rods are prone to damage due to random crystallization points and adhesion of glyceryl triacetate, leading to frequent shutdowns and poor cutting quality.
Innovation Solution
A cutter structure with a high-hardness middle cutter and detachable side cutters, where the side cutters protect the middle cutter from adhesion and are easily replaceable, ensuring stable and efficient cutting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional cutter is used to cut polylactic acid fiber filter rods, then the cutting process is simple, but the blade is easily damaged by random crystallization points and glyceryl triacetate adhesion
Solution Approach 1:
The cutter is divided into multiple independent cutters (first cutter, second cutter, third cutter, fourth cutter) arranged around the filter rod. Each cutter operates independently, and if one blade is damaged by crystallization points, the others can continue functioning. This segmentation improves reliability while keeping each individual cutter simple in structure.
Solution Approach 2:
Different cutters are positioned at different locations around the filter rod circumference. The first and second cutters are arranged at positions where crystallization points are less likely to cause damage, while the third and fourth cutters are positioned to handle sections more prone to adhesion. This local differentiation allows each cutter to be optimized for its specific cutting zone.
2Productivity
If the cutter runs at high speed to maintain productivity, then cutting efficiency is improved, but blade damage increases due to high-speed movement and crystallization point collisions
Solution Approach 1:
By dividing the cutting function into multiple independent cutters, the system can maintain high cutting speed through parallel operation while distributing the mechanical stress and collision risks across multiple blades. This allows high productivity without compromising blade stability.
Solution Approach 2:
The cutter shaft is designed with sufficient rigidity and the cutters are positioned to minimize collision with crystallization points. The structural design anticipates potential damage and incorporates features that cushion or prevent blade damage before it occurs, enabling sustained high-speed operation.
3Productivity
If glyceryl triacetate adheres to the cutter surface, then cutting can continue, but the cutter performance deteriorates and frequent shutdowns are required
Solution Approach 1:
Multiple cutters are arranged around the filter rod, and glyceryl triacetate adhesion is distributed across multiple cutter surfaces rather than concentrating on a single blade. This allows the system to maintain continuous cutting by rotating to fresh cutter surfaces, improving both productivity and performance stability.
Solution Approach 2:
The cutter shaft rotates continuously, dynamically bringing fresh cutter surfaces into contact with the filter rod while moving away from contaminated surfaces. This dynamic rotation allows the system to maintain cutting performance by continuously exposing fresh blades to the material being cut.
Data Source
AI summary
The present disclosure provides a cutter structure for cutting polylactic acid fiber filter rods and relates to the technical field of cigarette preparation. The cutter structure includes a cutter shaft and cutters, wherein the cutters include a middle cutter and side cutters, the middle cutter is round, and cutting edges of the side cutters are flush with an edge of the middle cutter; hardness of the middle cutter is higher than that of the side cutters, so that the tow middle cutter can be conveniently used for cutting lized tows that have been crystallized in the polylactic acid fiber filter rods; and the side cutters are detachably arranged on side faces of the middle cutter and used for preventing glyceryl triacetate from adhering to the side faces of the middle cutter. The cutter structure provided by the present disclosure is simple in arrangement, the two kinds of cutters are cooperatively arranged, the situation that blades are damaged when the middle cutter collides with random crystallization points in polylactic acid fiber tows is avoided due to high hardness of the middle cutter, the side cutters on the side faces can protect the middle cutter against glyceryl triacetate adhesion, the side cutters are detachably arranged, so as to be conveniently replaced, and therefore the whole structure has higher efficiency and stability for cutting the polylactic acid fiber filter rods.