Fastener Pusher Annular Protrusion for Gypsum Board Recess
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Solution Overview
Problem
Existing fastener pushers consistently fail to recess fastener heads without damaging gypsum board or drywall, leading to material waste and increased downtime in high-throughput manufacturing due to inconsistent performance with varying air pressures.
Innovation Solution
A fastener pusher with a workpiece-contact element featuring an annular protrusion that creates a depressed area in the gypsum board, allowing for recessed fastener heads without damaging the board, using low-pressure air and a fastener-stabilizing assembly to guide and secure the fasteners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If high-pressure air is used to drive the driving element, then the fastener head is recessed below the exterior plane, but the gypsum board is damaged beyond repair
Solution Approach 1:
The workpiece-contact element features a flat central contact surface surrounded by a raised annular protrusion. This creates localized different functions: the flat surface contacts and protects the gypsum board exterior plane, while the annular protrusion contacts and compresses the board to create a depressed area for fastener head reception, enabling precise recess control without damaging the overall board structure
Solution Approach 2:
The annular protrusion performs preliminary compression and positioning of the gypsum board before the fastener is driven. This pre-compression creates a controlled depressed area that guides the fastener head to the correct recess depth, preventing over-driving and damage to the board while ensuring consistent recess formation
2Object-affected harmful factors
If low-pressure air is used to drive the driving element, then the gypsum board is not damaged, but the fastener head is not consistently recessed below the exterior plane
Solution Approach 1:
The annular protrusion provides localized mechanical compression and positioning function that does not depend on high air pressure. By physically contacting and compressing the gypsum board in the annular region, it creates a consistent depressed area that ensures proper fastener head recess depth even when using low-pressure air to drive the fastener
Solution Approach 2:
The workpiece-contact element with its annular protrusion acts as an intermediary mechanical element between the fastener pusher and the gypsum board. It translates the driving force into controlled local compression and positioning, mediating the interaction to achieve consistent recess depth without requiring high air pressure that would damage the board
3Device complexity
If a flat workpiece-contact surface is used, then the device structure is simple, but the fastener head recess depth is inconsistent and varies with air pressure
Solution Approach 1:
The workpiece-contact element combines a simple flat central surface with a raised annular protrusion, creating localized functional zones. The flat surface maintains simplicity for board contact, while the annular protrusion adds the geometric feature needed for consistent depressed area formation and fastener head positioning, achieving precision without complex mechanisms
Solution Approach 2:
The annular protrusion performs preliminary geometric preparation by creating a depressed area in the gypsum board before fastener insertion. This pre-formed geometry ensures consistent fastener head recess depth regardless of air pressure variations, achieving manufacturing precision through simple geometric design rather than complex control systems
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 consistently recesses fastener heads below the exterior plane of the gypsum board, minimizing damage and reducing downtime by enabling reliable attachment without material loss, even in automated manufacturing environments.
Implementation Method 1
The workpiece-contact surface forms an annular protrusion that extends away from the attachment side... The annular protrusion of the workpiece-contact element creates a depressed area in the gypsum board during fastener driving
Implementation Method 2
The fastener pusher then uses compressed air (as is known in the art) to drive the driving assembly through the cylinder from the pre-firing position to the firing position
Data Source
Figure 1A~1B
Figure 2
Figure 3
AI summary
Various embodiments of the present disclosure provide a workpiece-contact element for a fastener pusher. In one embodiment, the workpiece-contact element includes an attachment side, a workpiece-contact surface, and one or more fastener-exit surfaces defining a fastener-exit throughbore having a longitudinal axis and extending through the workpiece-contact surface. The workpiece-contact surface forms an annular protrusion extending away from the attachment side.