Filter Rod Maker Drum with Reduced-Diameter Abutting Pin
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Solution Overview
Problem
The manufacture of filter rods for smoking articles using stiff, thicker wrapping web material faces challenges such as increased machine downtime due to excess adhesive accumulation and reduced sealing efficiency, which affects seal quality, ovality, and visual impact.
Innovation Solution
An apparatus with a rotating drum transfer device featuring stop means with a reduced diameter abutting portion and a compressing means with a spherical shape to minimize adhesive accumulation and maintain cylindrical shape, along with a heating and cooling system to optimize adhesive setting and reduce ovality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If stiff, thicker wrapping web material is used, then rigidity and structural integrity of filter rod are improved, but adhesive accumulation increases and machine downtime increases
Solution Approach 1:
The transfer drum features flutes with specific geometric characteristics (depth, width, spacing) that create localized zones for receiving and containing filter rods. This local structural optimization allows the drum to effectively handle stiff wrapping materials without excessive adhesive accumulation, resolving the contradiction between rigidity and machine downtime.
Solution Approach 2:
The patent modifies the geometric parameters of the transfer drum flutes (depth d, width w, spacing s) to optimize performance. By adjusting these parameters, the system can accommodate stiff wrapping materials while preventing adhesive buildup that causes downtime, thus resolving the technical contradiction.
2Strength
If stiff, thicker wrapping web material is used, then structural integrity is improved, but seal quality deteriorates due to excess adhesive accumulation
Solution Approach 1:
The fluted structure creates localized regions on the transfer drum that precisely contain filter rods during transfer. This local optimization ensures proper positioning and prevents adhesive from accumulating in wrong locations, thereby maintaining seal quality while using stiff wrapping materials.
Solution Approach 2:
The flutes act as an intermediary structure between the filter rod and the transfer drum surface. They provide a controlled interface that manages adhesive distribution, preventing excess adhesive from compromising seal quality while still allowing stiff materials to be handled effectively.
3Strength
If stiff, thicker wrapping web material is used, then rigidity is improved, but ovality increases affecting visual impact
Solution Approach 1:
The flutes provide localized support and containment for the filter rods during transfer operations. This local structural feature helps maintain the cylindrical shape of stiff-wrapped filter rods, preventing ovality development while preserving the rigidity benefits of thicker wrapping materials.
Solution Approach 2:
The curved, fluted structure of the transfer drum creates a geometric configuration that naturally supports cylindrical filter rods. The curved surfaces of the flutes help maintain the circular cross-section of the filter rods during transfer, preventing ovality even when stiff, thicker wrapping materials are used.
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
Significantly reduces machine downtime, improves seal quality, and maintains low ovality and visual impact of filter rods, even with stiff wrapping web materials.
Implementation Method 1
a heat source for activating the adhesive, the heat source being arranged at a position along the garniture
Implementation Method 2
means for cooling the adhesive in order to cause the rapid setting of the adhesive. In particular, filter rod makers are known that comprise a cooling bar operatively coupled with the endless belt conveyor at a location along the wrapping web material path downstream of the heat source
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A filter rod maker comprises an operating station for forming a wrapped filter rod; a cutter blade for cutting the wrapped filter rod into rod segments(104); and a transfer device comprising a rotating drum (100) having a plurality of spaced apart flutes (102) on an exterior surface of the drum, the flutes for receiving the rod segments (104) as the drum rotates. The drum comprises stop means (106) at one end of each of the flutes against which the filter rods abut when they are received into the flutes. The stop means (106) comprises a pin (108) with a main cylindrical body having a first diameter (D1) and extending along an axis (F) of the flute (102) between a first end, at which the pin is attached to a frame, and a second end. The pin (108) comprises an abutting portion (118) extending along the axis (F) from the second end of the main cylindrical body, the abutting portion (118) having a second diameter (D2) smaller than the first diameter (D1) and presenting a substantially flat surface for abutting an end of the elongate filter rod.