Tubular Winding Core Positioning on Expansible Shaft
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Solution Overview
Problem
Existing methods for preparing tubular winding cores require the removal of annular spacer elements after winding, leading to increased preparation time and wear on cutting blades and shafts, due to the need for multiple cuts in the tube to form cores.
Innovation Solution
A method and device that position tubular winding cores axially and torsionally on an expansible shaft without intercalated spacer rings, allowing for simultaneous winding without protrusion from the roll sides, by axially and torsionally locking cores at specific distances, and optionally using gripping members to separate cores after cutting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If annular spacer elements are used between consecutive cores to prevent protrusion, then the cores do not protrude from the roll sides, but additional removal operations are required and device complexity increases
Solution Approach 1:
The invention extracts and eliminates the annular spacer elements from the system. Instead of using spacers between cores, the patent positions cores directly adjacent to each other on the expansible shaft, with the tube material itself forming the core structure without requiring additional spacer components.
Solution Approach 2:
The invention merges the core structure with the tube material directly. The tube is divided into core portions that become the winding cores themselves, eliminating the need for separate spacer elements. This merging simplifies the overall structure and reduces the number of components.
2Ease of manufacture
If multiple cuts are performed on the tube to obtain winding cores with spacers, then cores are formed, but preparation time increases and cutting blade wear increases
Solution Approach 1:
The invention segments the tube into multiple core portions through cutting, but then eliminates the need for additional spacer removal operations. The segmentation is performed once to create adjacent cores directly, reducing the total number of operations compared to creating cores with spacers that require subsequent removal.
Solution Approach 2:
The invention performs the core formation and positioning in advance on the expansible shaft before winding begins. By pre-positioning the cores in their final adjacent locations and locking them in place, the system eliminates the need for spacer removal operations that would otherwise be required after winding.
3Ease of manufacture
If multiple cuts are performed to create cores with spacers, then cores are formed, but wear on cutting blades and expansible shafts increases
Solution Approach 1:
The tube is segmented into core portions with a single set of cuts, eliminating the need for additional cuts to remove spacers. This reduces the total number of cutting operations and associated wear on cutting blades and shafts.
4Productivity
If cores are positioned adjacent to each other without spacers, then preparation time is reduced and wear is minimized, but positioning precision must be maintained
Solution Approach 1:
The expansible shaft provides a mechanism for precise positioning and locking of cores in adjacent locations. The shaft can be expanded and contracted to securely hold cores at predetermined positions, ensuring accurate spacing and alignment without requiring additional spacer elements.
Solution Approach 2:
The invention changes the positioning parameter from fixed spacer-based spacing to adjustable shaft-based positioning. By controlling the expansion and contraction of the shaft, precise positioning of adjacent cores is achieved, maintaining manufacturing precision while eliminating spacers.
Data Source
AI summary
The device to position tubular winding cores on a common supporting and rotating shaft comprises: supporting members for said shafts AS and gripping and handling members 23A, 23B of the winding cores A parallel to the axis of said shaft AS.