Embroidery Label Clamping Frame for Precise Sewing Alignment
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Solution Overview
Problem
Existing embroidery machines face difficulties in accurately positioning and orienting labels on fabrics, leading to uneven sewing and visible defects, especially when multiple labels with different shapes need to be applied, and pose risks to operators due to manual handling.
Innovation Solution
A fabric clamping frame with a movable template and pressing device that allows precise alignment and fixation of labels, using a combination of friction and form-fit coupling, along with programmable movements to ensure correct sewing along the label perimeter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual positioning of labels is used, then the operator can place labels on fabric, but positioning precision and orientation accuracy deteriorate leading to uneven sewing and visible defects
Solution Approach 1:
A template with a cutout matching the label shape is introduced as an intermediary device. The template's cutout serves as a precise guide that mediates between the operator's manual placement and the sewing needle's path, ensuring the label is correctly positioned and oriented relative to the sewing line without requiring high manual precision
Solution Approach 2:
The template is prepared in advance with a cutout that precisely matches the label shape and desired positioning. This preliminary preparation of the template allows the operator to simply place the label within the pre-defined cutout area, eliminating the need for precise manual measurement and positioning during the sewing operation
2Stability of the object's composition
If the operator holds the label steady during sewing, then label positioning can be maintained, but operator safety deteriorates due to exposure to moving needle and thread
Solution Approach 1:
The template acts as an intermediary that physically holds and stabilizes the label during sewing. The label is placed within the template's cutout, which keeps it steady without requiring the operator's hand to be near the needle path, thus maintaining label stability while eliminating operator exposure to harmful factors
Solution Approach 2:
The template structure itself provides the stabilizing function through its cutout design. The label is retained by the geometry of the template cutout and the friction between the label and fabric, without requiring continuous manual holding or additional clamping mechanisms that would expose the operator to risk
3Measurement precision
If cutout plate is used for label retention, then label positioning is improved, but device complexity increases due to additional components
Solution Approach 1:
The template with cutout serves multiple functions simultaneously: it guides label positioning, defines the sewing path, and retains the label during sewing. This multi-functionality eliminates the need for separate positioning devices, retention clamps, and guiding mechanisms, thereby reducing overall device complexity while maintaining high alignment accuracy
Solution Approach 2:
The positioning guide, label retention mechanism, and sewing path definition are merged into a single template component. The cutout plate integrates these functions by using its geometric shape to simultaneously achieve precise label alignment and stable retention during the sewing operation
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
Enables accurate and efficient application of multiple labels with reduced operator risk, ensuring consistent sewing quality and facilitating mass production.
Implementation Method 1
a surface P for resting a fabric, the frame being mounted on movement means of the embroidery machine so as to be movable between a raised position for insertion/removal of the fabric from the embroidery machine and a lowered position for holding the fabric on the resting surface by friction
Data Source
AI summary
A frame (1) for clamping fabric (4) for embroidery machines (5), comprising at least one cutout plate (2) provided with at least one cutout (21, 22) having a shape that corresponds to a first label (20) to be applied by sewing to the fabric (4), the internal rim (22a) of the cutout (22) being adapted to surround the first label (20) during sewing. The clamping frame (1) further comprises a pressing device (6) with a pressure plate (60) that is movable, with respect to the clamping frame (1), between a retracted position and a position in which the pressure plate is accommodated in the cutout (22) of the cutout plate (2) to retain the label in a direction perpendicular to the resting surface (P) for the fabric (4). (FIG. 5)