Offset Guide Section for Tobacco Rod Format Belt
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Solution Overview
Problem
Existing rod-making machines in the tobacco-processing industry face challenges in producing high-quality strands with minimal folds and markings, particularly when wrapping strands with a wrapping strip, due to inefficiencies in the format system and cover part designs.
Innovation Solution
The proposed format system and cover part design include an offset guide section for the format tape, a U-shaped section for reduced bending stresses, and adjustable cover strips to ensure precise guidance and support of the wrapping strip, minimizing friction and creases, and allowing for optimal shaping and gluing of the strand.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the guide section is positioned at the enveloping curve of the support surface, then the wrapping strip can be properly supported, but the format tape cannot be sufficiently withdrawn from the strand-forming channel, causing friction and potential folds
Solution Approach 1:
The guide section is offset from the enveloping curve of the support surface in the longitudinal direction, creating a dimensional separation. This allows the format tape to be withdrawn from the strand-forming channel while the support surface maintains proper support for the wrapping strip, resolving the conflict between tape withdrawal and strip support
2Strength
If the format tape is tightly guided along the strand-forming channel, then lateral pressure on the strand is sufficient for shaping, but frictional forces increase and the service life of the format tape decreases
Solution Approach 1:
The guide section is positioned offset from the enveloping curve of the support surface in the longitudinal direction, creating a dimensional separation. This allows the format tape to be withdrawn from the strand-forming channel while the support surface maintains proper support for the wrapping strip, resolving the conflict between tape withdrawal and strip support
3Object-affected harmful factors
If the guide section is offset from the enveloping curve of the support surface, then the format tape can be withdrawn and friction is reduced, but the wrapping strip may not be properly supported
Solution Approach 1:
The guide section is offset from the enveloping curve of the support surface in the longitudinal direction, creating a dimensional separation. This allows the format tape to be withdrawn from the strand-forming channel while the support surface maintains proper support for the wrapping strip, resolving the conflict between tape withdrawal and strip support
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 design enhances the production of high-quality strands by reducing the formation of folds and markings, increasing the service life of the format tape, and ensuring reliable transport and wrapping of the strand with the wrapping strip, while also allowing for diameter adjustments and improved gluing processes.
Implementation Method 1
Frictional forces can be reduced in a simple manner
Data Source
AI summary
The present invention relates to a format system for a rod-making machine in the tobacco-processing industry for forming a rod (1) and wrapping the rod (1) with a wrapping strip (9), comprising a base part (2) extending in the transporting direction of the rod (1), also comprising a format belt (7) which is accommodated in the base part (2), is intended for transporting the wrapping strip (9) and has an inner side (8), an outer side (10), a first periphery (11) and a second periphery (12), which is located opposite the first periphery (11), and further comprising a covering part (13) which is arranged opposite the base part (2), extends in the transporting direction of the rod (1) and has a guide portion (22, 27, 28), for accommodating the first periphery (11) of the format belt (7), and a supporting surface (23, 26), for supporting the wrapping strip (9), in the case of which production of formed rods can be improved, in particular the formation of creases and/or markings on a produced rod is largely avoided, in that the guide portion (22, 27, 28) is offset in relation to the envelope of the supporting surface (23, 26), as seen in section, at least in a format-system portion which extends in the transporting direction of the rod (1). The present invention also relates to a covering part (13, 14, 15) for a format system of a rod-making machine in the tobacco-processing industry, having a retaining part (17, 19) and having a forming part (18, 20) which is connected to the retaining part (17, 19) and has a concave supporting surface (23, 26) extending in the circumferential direction, and in the longitudinal direction, by means of which production of formed rods is improved, in particular the formation of creases and/or markings on a produced rod is largely avoided, by the formation, between the retaining part (17, 19) and the forming part (18, 20), of a guide portion (22, 27, 28) which is bounded on two sides, as seen in section, by walls (24, 25; 28, 29; 39, 40) and is intended for guiding a format belt (7), in particular for guiding a periphery (11, 12) of the format belt (7).