Filter Forming Device Radial Plasticizer Spraying
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Solution Overview
Problem
Conventional filter manufacturing machines face issues with tow projecting from the surface of through holes in filter rods, leading to low-quality products, and increasing plasticizer usage to prevent hole crushing results in filter dissolution or offensive smells.
Innovation Solution
A filter manufacturing machine with a tubular forming path and a second plasticizer addition unit that sprays plasticizer radially from the axis of the forming tube, allowing precise hardening of the through hole surface without excessive plasticizer use, combined with a heat treatment section and a wrapping device for forming and cutting filter rods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a large amount of plasticizer is used to increase the hardness of the filter and prevent through hole crushing, then the hardness of the filter increases, but the filter dissolves or gives off an offensive smell
Solution Approach 1:
The patent applies local quality by using a second plasticizer addition unit to spray plasticizer radially from the axis of the forming tube only to the sheet material that will form the through hole surface. This localized application ensures the through hole surface has sufficient hardness to prevent crushing during cutting, while avoiding excessive plasticizer use elsewhere that would cause dissolution or offensive smells.
2Strength
If conventional plasticizer addition methods are used, then the sheet material is hardened, but tow projects from the surface of the through hole resulting in low-quality products
Solution Approach 1:
The patent applies local quality by directing the second plasticizer addition unit to spray plasticizer radially from the forming tube axis only to the specific region of sheet material that will become the through hole surface. This localized treatment ensures proper hardness at the critical through hole surface area while preventing tow projection that occurs with conventional uniform plasticizer application.
3Shape
If an additional tube is arranged along the axis of the filter rod to form a hollow structure, then a hollow filter rod is manufactured, but the number of component parts increases and the apparatus becomes more complex
Solution Approach 1:
The patent applies universality by making the forming tube serve multiple functions: it acts as both the forming device that shapes the sheet material into a hollow cylindrical rod and as the plasticizer application device through the integrated second plasticizer addition unit that sprays plasticizer radially from its axis. This eliminates the need for separate tubes and feed mechanisms, reducing component complexity while achieving the hollow structure.
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
Prevents tow projection and hole crushing during cutting while minimizing plasticizer usage, ensuring high-quality filters without the risk of dissolution or offensive odors.
Implementation Method 1
a heat treating section configured to heat the sheet material while the sheet material passes through the tubular forming path
Implementation Method 2
a second plasticizer addition unit arranged near an inlet of the tubular forming path and configured to spout a second plasticizer radially from an axis of the tubular forming path to add the second plasticizer to the sheet material
Data Source
Figure 1
Figure 2~3
AI summary
A filter manufacturing machine includes a feed path (7) configured to continuously feed a sheet material containing filter fibers and provided with a first plasticizer addition unit (9); a forming device (3) connected to a terminating end of the feed path (7) and configured to form the sheet material (6) into a hollow rod-shaped continuous filter body (11), the forming device including a tubular forming path for forming the sheet material (6) into the continuous filter body (11), a heat treating section for heating the sheet material, and a second plasticizer addition unit (14) arranged near the inlet of the tubular forming path; and a wrapping device (4) configured to receive the continuous filter body (11) delivered from the forming device (3) and wrap the continuous filter body in a wrapper to form a filter rod (19).