Mold Roll Axial Positioning for Surface Fastener Thickness Control
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Solution Overview
Problem
The relative position between the extruding nozzle and the mold roll in surface fastener molding machines can vary, leading to fluctuations in substrate thickness of the molded surface fastener, which affects production quality and requires complex maintenance.
Innovation Solution
A surface fastener molding apparatus with axially supported mold rolls and linear driving mechanisms that allow for precise regulation of the distance between the mold roll and the extruding nozzle, using ball screws and speed reducers to maintain consistent substrate thickness through dynamic compensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the mold roll position is fixed relative to the extruding nozzle, then the device structure is simple, but the substrate thickness fluctuates due to position variations
Solution Approach 1:
The mold roll is made dynamically adjustable through linear driving means (ball screws) that enable independent axial movement of the mold roll relative to the extruding nozzle. This dynamic positioning capability allows real-time compensation for position variations, ensuring consistent substrate thickness while maintaining a relatively simple overall device structure.
Solution Approach 2:
The invention changes the positional parameter of the mold roll axially by using linear driving mechanisms. By adjusting the axial position of the mold roll through ball screws and nuts, the system can compensate for position variations and maintain precise substrate thickness control without requiring complex redundant structures.
2Manufacturing precision
If linear driving means are added to adjust mold roll position, then substrate thickness is stabilized, but the device complexity increases
Solution Approach 1:
The linear driving system is segmented into two independent units: a first linear driving means for the first end of the mold roll and a second linear driving means for the second end. Each unit consists of a ball screw and nut combination, allowing independent adjustment of each end of the mold roll. This segmentation enables precise control with simpler individual components rather than one complex centralized driving mechanism.
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 solution stabilizes the substrate thickness of the surface fastener, simplifies maintenance, and enhances production yield by dynamically adjusting to fluctuations in the mold space, preventing irregularities and reducing production costs.
Implementation Method 1
the first linear driving means (30) and the second linear driving means (60) each may preferably include a ball screw (34, 64) in which a nut (36, 66) is movable along a threaded shaft (35, 65)
Data Source
AI summary
A surface fastener molding apparatus includes a supporting structure and a second supporting structure for axially supporting a mold roll in a rotatable manner at a first end side and a second end side of the mold roll which is opposite to the first end side. The mold roll includes a circumferential surface in which a plurality of mold cavities for molding engaging elements of the surface fastener is provided. A first linear driving means and second linear driving means are provided which are for, respectively, advancing or retracting the first supporting structure and the second supporting structure. The degree of closeness between the extruding nozzle and the mold roll is regulatable across the first end side and the second end side of the mold roll, based on at least one activation of the first driving means and the second driving means.