Stud and Rivet Application Device Using Vacuum-Held Mold Assembly
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Solution Overview
Problem
Existing methods for attaching studs to leather materials are either unreliable due to breakable one-piece claws or labor-intensive and skill-dependent two-piece rivet systems, which are time-consuming and costly.
Innovation Solution
A device comprising a mold-holder plate, die, intermediate plate, and lid with vacuum extraction system that allows for rapid and automatic application of two-piece studs with rivets, eliminating the need for pre-piercing leather and manual positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If one-piece studs with claws are used, then the application process is quick and simple, but the attachment reliability is poor because claws may break or bend
Solution Approach 1:
The stud is divided into two separate pieces: a body portion and a claw portion. This segmentation allows each part to be optimized independently - the body provides structural integrity while the claw provides reliable anchoring, resolving the contradiction between simple application and reliable attachment.
2Reliability
If two-piece studs with rivets are used, then the attachment reliability is improved, but the application process becomes time-consuming and labor-intensive
Solution Approach 1:
The die and lid are merged into a single mold assembly that simultaneously positions both the stud body and claw. This combination allows both components to be installed in one operation, maintaining high reliability while significantly improving application speed and eliminating manual positioning steps.
Solution Approach 2:
The die is pre-configured with positioning features and the lid is pre-configured with holding means for the claw. This preliminary preparation eliminates the need for manual positioning and alignment during application, resolving the contradiction between reliable attachment and fast application.
3Reliability
If manual application of two-piece studs is used, then attachment reliability is improved, but labor costs increase and operator skill dependency increases
Solution Approach 1:
The mold assembly performs the positioning and alignment functions automatically through its built-in positioning features and holding means. This self-service mechanism eliminates the need for operator skill and manual intervention, reducing labor costs while maintaining attachment reliability.
4Manufacturing precision
If manual positioning of studs is used, then correct placement can be achieved, but the process requires operator skill and time
Solution Approach 1:
The die serves as an intermediary tool between the operator and the stud components. It provides pre-configured positioning features that automatically guide the stud body and claw to their correct positions, achieving precise placement without requiring operator skill or complex manual positioning procedures.
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 rapid, reliable, and cost-effective application of studs with improved attachment strength, reducing labor costs and operator dependency while ensuring consistent results.
Implementation Method 1
a vacuum extraction system in communication with said housing and arranged to extract air from said housing
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A device (1) for applying studs (6) on straps of material (S) comprises: a die (5) comprising a plurality of housings (52) intended to receive the body (60) of said studs, a lid (9) comprising a plurality of housings (92) intended to receive the head (82) of rivets (8), holding means disposed in said housings (92) of the lid to hold the heads (82) of the rivets in the housings of the lid, an intermediate plate (7) intended to be disposed between said die (5) and said lid (9); said intermediate plate (7) comprising a plurality of housings (52) intended to receive the stem (80) of said rivets. When the die (5), the intermediate plate (7) and the lid (9) are overlapped, the housings (52, 72, 92) of the die (5), the intermediate plate (7) and the lid (9), respectively, are in mutual register.