Feeding Unit Symmetric Slide Guide Wear Reduction
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Solution Overview
Problem
Existing feeding units in automatic manufacturing machines for hygiene absorbent articles suffer from instability and rapid wear due to asymmetric slide structures, which limits production rates and prevents the use of permanent magnets for high dynamic performance.
Innovation Solution
A feeding unit with a closed curved guide and multiple slides supported by a linear electric motor, featuring a closed curved stator and movable sliders with permanent magnets, allows for precise movement and high-speed operation while minimizing wear through symmetrical design and optimized wheel profiles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If asymmetric slide structure is used to support holding heads, then the slide can be compact and fit in limited space, but the wheels wear quickly causing instability and limiting production rates
Solution Approach 1:
The patent applies asymmetry in reverse - it uses a symmetric slide structure where the holding heads are positioned symmetrically on the slide body. This symmetry ensures that the wheels on both sides experience equal wear patterns, preventing the quick wear and instability associated with asymmetric designs, while maintaining compact dimensions through optimized symmetric geometry.
2Shape
If small-sized slides are used to allow sharp bends in the guide, then the structure can cover tight curves, but permanent magnets cannot be fitted and driving forces are insufficient for high dynamic performance
Solution Approach 1:
The patent resolves this contradiction by transitioning from a single-track design to a dual-track configuration. This dimensional change allows the slide to span across two parallel tracks, effectively doubling the available space for mounting permanent magnets while maintaining the ability to follow sharp bends in the guide path through the dual-track geometry.
3Shape
If multiple idle wheels are arranged closely on the slide, then the slide can follow sharp bends in the guide, but the wheel structure becomes complex and manufacturing difficulty increases
Solution Approach 1:
The patent applies segmentation by dividing the wheel arrangement into modular units. Each slide incorporates a standardized set of idle wheels that can be independently manufactured and then assembled onto the slide body. This modular segmentation simplifies the manufacturing process while maintaining the capability to follow sharp bends in the guide path.
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
The solution enables stable high-speed operation and reduced wear, allowing for increased production rates and the integration of permanent magnets for enhanced dynamic performance.
Implementation Method 1
a conveyor (5), which supports the sucking holding heads (4) and cyclically moves each sucking holding head (4) along an application path (P)
Implementation Method 2
a closed curved stator (13) and a plurality of movable sliders (14), each electro-magnetically coupled to the stator (13) so as to receive, from the stator (13), a driving force
Data Source
AI summary
A feeding unit to feed a component in an automatic manufacturing machine; has: at least one holding head designed to receive and hold the component; a closed curved guide arranged in a fixed position along an application path; an equipment supporting the holding head and provided with at least one slide coupled to the guide by a plurality of wheels; a linear electric motor, and a movable slider electro-magnetically coupled to the stator and is rigidly connected to the slide. The guide has, on the surface in contact with the wheels, a first transverse profile having a concavity or a convexity; the wheels have, on the surface in contact with the guide, a second transverse profile, which has a convexity or a concavity, and generates, with the first profile, a shape coupling between the guide and the wheels, which forbids a transverse movement of the slide relative to the guide.