Variable Angle Cutting Device for Rubber Webs
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Solution Overview
Problem
Existing cutting devices for semifinished multilayers with metal wires or textile webs lack precision and straightness in transverse cuts, leading to material waste and requiring manual interventions for winding and sampling operations.
Innovation Solution
An automatic transverse cutting device with a movable cutting unit and two conveyor belts, including a guiding and blocking cylinder system, allows for precise angled cuts and automated operations such as drawing-in, sampling, and discarding, enhancing safety and reducing errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a cutting device is used for transverse cuts of semifinished multilayers, then the multilayer can be cut into desired lengths, but the cuts lack precision and straightness leading to material waste
Solution Approach 1:
The multilayer is pre-tensioned and positioned on the conveyor belt before cutting occurs. The blocking cylinder secures the multilayer in place, ensuring it remains stable and properly aligned during the cutting operation, which prevents imprecise cuts and reduces material waste
Solution Approach 2:
The manual positioning and securing operations are replaced by an automated system involving a movable blocking cylinder and conveyor belt mechanism. This automated mechanical system provides more consistent and precise positioning compared to manual operations, improving cut precision
2Productivity
If manual interventions are performed for winding and sampling operations, then flexibility and adaptability are maintained, but operational efficiency decreases and errors increase
Solution Approach 1:
The system performs winding and sampling operations automatically without requiring manual intervention. The conveyor belt transports the cut multilayer to the winding station, and the system automatically winds it onto reels or performs sampling, eliminating human error and improving operational efficiency
Solution Approach 2:
The conveyor belt system serves multiple functions: it transports the multilayer during cutting, positions it for winding, and facilitates sampling operations. This multi-functional automated system replaces multiple manual operations, improving both productivity and reliability
3Productivity
If perpendicular cuts are made to the feeding direction, then the multilayer is efficiently divided, but scraps are lost at the initial and final parts of the roll
Solution Approach 1:
The cutting angle parameter is made variable rather than fixed at perpendicular. The cutting unit can be inclined at different angles relative to the feeding direction, allowing optimization of the cut angle to minimize scrap loss while maintaining cutting efficiency
Data Source
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AI summary
The invention relates to a cutting device (500) for a manufacturing line of semifinished multilayer products comprising pairs of rubber layers between which a plurality of metal cords or fabric webs are arranged, said cutting device (500) comprising a cutting unit (510) with variable cutting angle that is movable along guide rails and a first conveyor belt (520) that stretches out in a horizontal direction (H) and is arranged under said cutting unit (510) in a vertical direction (V), said first conveyor belt (520) being provided with a guiding cylinder (521) and a blocking cylinder (522) arranged at an outlet end thereof. Said guiding cylinder (521) is restrained to a rotatable arm pivoted about a transverse axis perpendicular to said horizontal and vertical directions (H, V) and said blocking cylinder (522) is movable along a straight direction to and from the guiding cylinder (521). The invention also relates to a manufacturing line of semifinished multilayer products comprising the cutting device (500) above, as well as to a cutting method carried out in line with the cutting device.