Dispenser Lifting Device for Heat-Safe Substrate Positioning
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Solution Overview
Problem
Existing dispensers for viscous materials on printed circuit boards struggle to efficiently adjust to different substrate widths and protect transport mechanisms from high temperatures during heating.
Innovation Solution
A dispenser system with adjustable rails, a heating device, and lifting devices that move in the Z-axis direction, allowing substrates to transition between transport and dispensing positions while protecting the transport mechanism from heat.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the heating device is positioned close to the substrate to effectively heat it for material attachment, then the heating efficiency is improved, but the transport mechanism is exposed to high temperatures causing thermal damage
Solution Approach 1:
The system is divided into functionally independent zones: the heating device operates in a lower zone while the transport mechanism operates in an upper zone, physically separated by the rail structure. This spatial segmentation allows the heating device to generate high temperatures for effective material attachment without exposing the transport mechanism to thermal damage.
Solution Approach 2:
The problem is solved by transitioning from a horizontal arrangement to a vertical (Z-axis) arrangement. The heating device is positioned below the rail in the Z-axis direction, while the substrate is lifted to the dispensing position above the rail. This dimensional change creates thermal separation while maintaining functional effectiveness.
2Device complexity
If the rails are made fixed to simplify the structure, then the device complexity is reduced, but the adaptability to different substrate widths is lost
Solution Approach 1:
The rail system transitions from a fixed structure to a dynamic, adjustable structure. One rail is made movable in the Y-axis direction, allowing the distance between rails to be adjusted according to different substrate widths. This dynamic adjustment capability maintains structural simplicity while providing versatility for different substrate sizes.
Solution Approach 2:
The adjustable rail system provides universal applicability across different substrate widths. By allowing one rail to move in the Y-axis direction, the same dispenser structure can accommodate various substrate sizes, making the device universally applicable rather than requiring multiple specialized fixtures.
3Device complexity
If the substrate remains at a constant transport position during heating, then the transport mechanism structure is simplified, but the ability to position the substrate precisely at the dispensing position is reduced
Solution Approach 1:
Instead of moving the entire substrate continuously, the system applies partial action by lifting the substrate only to the specific dispensing position above the rail where material application is required. The lifting device raises the substrate from the transport position to the dispensing position, providing precise positioning exactly where needed without requiring complex continuous motion control.
Solution Approach 2:
The lifting device acts as an intermediary mechanism between the transport system and the dispensing operation. It temporarily raises the substrate to the dispensing position above the rail, enabling precise positioning for material application, then returns it to the transport position. This intermediary action achieves precise positioning without requiring the entire transport mechanism to be complex.
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 efficient dispensing on substrates of varying widths and safeguards the transport system from thermal damage, ensuring consistent material application.
Implementation Method 1
a reset member located between the rail and the lifting member to be compressed when the lifting member is raised relative to the rail and to be able to lower the lifting member relative to the rail by a resilient force
Data Source
AI summary
The present disclosure provides a dispenser for dispensing a material on a substrate. The dispenser includes a pair of rails, a heating device, and a pair of lifting devices. One of the pair of rails is able to move towards or away from the other in the Y-axis direction to adjust the distance between the pair of rails, each rail having a supporting surface and a blocking portion above the supporting surface for supporting the substrate in a transport position, the blocking portion being used to keep the substrate in a dispensing position. The heating device is located below the pair of rails in the Z-axis direction and is movable in the Z-axis direction. The pair of lifting devices are respectively mounted on the pair of rails, each including: a lifting member movably connected to the rail and a reset member between the rail and the lifting member. The lifting member is able to be raised under pushing of the heating device to cause the substrate to rise from the transport position to the dispensing position and to lower the substrate from the dispensing position to the transport position under the action of the reset member when the heating device descends.