Double Carriage Linear Motor for Variable Section Cutting
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Solution Overview
Problem
Existing methods for producing individual sections from a material web, such as paper, are limited in variability as they require exchanging cylinders to change section size, making it difficult to produce sections of different lengths efficiently.
Innovation Solution
The use of double carriage linear motors, with two independent carriages and drivers, allows for variable section lengths by gripping and cutting the material web in a controlled manner, enabling the production of sections of varying lengths without the need for cylinder exchange.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If cutting blades and cutting strips are distributed on fixed cylinders in a jaw folder, then sections of uniform size are produced, but the device complexity increases when cylinder exchange is required to change section size
Solution Approach 1:
The patent replaces fixed cutting blades and strips on rigid cylinders with a dynamic system where the cutting element is attached to a movable carriage that can be repositioned along the material web. This allows the cutting position to be adjusted dynamically without exchanging entire cylinders, enabling variable section sizes while reducing device complexity.
Solution Approach 2:
The movable carriage system serves multiple functions: it positions the cutting element, guides the cut, and can be repositioned for different section lengths. This single multi-functional mechanism replaces the need for multiple specialized cylinders with fixed blade distributions, improving adaptability while simplifying the overall device structure.
2Productivity
If fixed cutting blades and strips are used on cylinders, then cutting precision is maintained, but production time increases due to cylinder exchange operations
Solution Approach 1:
The movable carriage can be quickly repositioned along the material web to different cutting positions without requiring time-consuming cylinder exchanges. This dynamic adjustment mechanism eliminates downtime between different section size productions, significantly improving productivity while maintaining cutting precision through controlled carriage positioning.
Solution Approach 2:
The carriage system allows preliminary positioning of the cutting element at the desired location before the cutting operation begins. This eliminates the need to stop production for cylinder exchanges, as the cutting position can be pre-adjusted by moving the carriage to the appropriate location along the web.
3Adaptability or versatility
If cutting blades are distributed on fixed cylinders, then manufacturing precision is maintained, but adaptability to different section lengths is limited
Solution Approach 1:
The movable carriage system maintains cutting precision through controlled movement and positioning mechanisms that ensure accurate placement of the cutting element at any position along the material web. The dynamic nature of the system allows precise positioning for different section lengths while maintaining manufacturing accuracy through guided motion control.
Solution Approach 2:
The system incorporates positioning feedback mechanisms that monitor and control the carriage location along the material web. This feedback ensures that the cutting element is accurately positioned at the desired location for each cut, maintaining manufacturing precision while enabling flexible adaptation to different section lengths.
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 approach enables the efficient production of sections with varying lengths directly from the web, improving flexibility and reducing production time by allowing continuous operation without the need for cylinder exchange, enhancing the processing of materials like paper in newspaper production.
Implementation Method 1
a first and a second double carriage linear motor (4, 8) which are parallel to the direction of material movement (12) are arranged
Implementation Method 2
the driver (22) of the first carriage (14) pulls a region (34) of the web (28) along the material movement direction (12)
Data Source
Figure 1a~1c
Figure 2
Figure 3a~3b
AI summary
The method involves moving pliable material web (28) of paper having individual sections (40) by first double slide linear motor (4) and second double slide linear motor (8) connected in parallel state, to material movement direction (12). The portion (34) of web on driver (22) of first motor is separated by using cutting tool (42), and the severed portion is transported away by second carriage of second motor. Before separation of the portion of material web, the material web is gripped by driver of first carriage of second motor. The length of a portion of corresponding region of web along the material movement direction is drawn by driver of first double slide linear motor, such that the portion of web on driver of second carriage (20) of second double slide linear motor is passed. An independent claim is included for device for process pliable material web.