Rubber Web Cutting Device with Adjustable Knife Angles
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Solution Overview
Problem
Current systems for cutting rubber mixture webs to length lack the ability to adjust cutting angles arbitrarily, limiting the creation of variable and large splice surfaces, which is essential for improving the quality of the splicing process in tire manufacturing.
Innovation Solution
A device with a concavely curved guide surface and an adjusting unit allows for continuous adjustment of the first acute cutting angle and simultaneous tilting of the knife, enabling the formation of parallelogram-shaped cut surfaces with adjustable angles, thereby increasing the splice surface area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a fixed cutting angle is used in current systems, then the device structure is simple, but the splice surface area is limited and cannot be enlarged
Solution Approach 1:
The cutting device employs a movable blade assembly that can be adjusted to different cutting angles relative to the material web. The blade is mounted on a support structure that allows angular adjustment, transforming the fixed cutting angle system into a dynamic one where the cutting angle can be varied to create larger splice surfaces while maintaining manageable device complexity through controlled mobility
Solution Approach 2:
The invention changes the cutting angle parameter from a fixed value to a variable parameter. By providing adjustment mechanisms that allow the cutting angle to be modified, the system can optimize the splice surface area according to different material properties and splicing requirements, directly addressing the limitation of fixed cutting angles in conventional systems
2Adaptability or versatility
If interchangeable parts are used to vary cutting angles, then any cutting angle can be achieved, but the device complexity and operation difficulty increase
Solution Approach 1:
The blade support structure serves multiple functions: it holds the cutting blade, provides angular adjustment capability, and maintains positioning stability. This multi-functional design eliminates the need for interchangeable parts while achieving cutting angle variability, thereby maintaining ease of operation through a unified adjustment mechanism rather than multiple specialized components
Solution Approach 2:
The blade assembly incorporates dynamic adjustment capabilities that allow cutting angle variation without requiring part replacement. The support structure enables continuous or stepped angular adjustment during operation, providing versatility while maintaining operational simplicity through a single integrated adjustment system rather than multiple interchangeable components
3Area of stationary object
If the cutting angle is increased to enlarge the cut surface, then the splice area increases, but the cutting device arrangement becomes more complex
Solution Approach 1:
The invention introduces angular dimensionality to the cutting operation. By allowing the blade to be positioned at different angles relative to the material web plane, the system enlarges the cut surface area by utilizing the angular dimension rather than simply increasing linear dimensions, thereby achieving larger splice areas without proportionally increasing device arrangement complexity
Data Source
Figure 1
Figure 2a~3b
AI summary
The invention relates to a device for cutting a material web (4) made of a rubber compound to length, with a feeder (1) for transporting the material web (4) to a cutting device (3) with a knife (12, 12') whose cutting edge (12a, 12a') has a width which corresponds at least to the width of the material web (4), wherein the material web (4) can preferably be cut simultaneously over its entire width by means of the knife (12, 12').In addition to the feeder (1) a guide device (2) is arranged, which has a concavely curved guide surface (2a) and along which an adjusting unit (11) carrying the knife (12, 12') can be adjusted and fixed, so that a first acute cutting angle (α) relative to the material web plane can be continuously adjusted, wherein the knife (12, 12') can be tilted by means of the adjusting unit (11) while maintaining the set first cutting angle (α), so that the material web (4) can be cut simultaneously at a second cutting angle (β) to form a parallelogram-shaped cutting surface (S2) having an angle deviating from 90°.