Pad Printing Carrier Venting for Bucket Workpiece Positioning
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Solution Overview
Problem
Existing pad printing carriers for bucket-shaped workpieces face issues with positive pressure gas obstruction during loading, leading to positioning difficulties and reduced production efficiency due to the need for lengthy negative pressure drawing processes.
Innovation Solution
A pad printing carrier with a breathing valve assembly, including a bucket mold and counterweight unit, that allows for quick release of positive pressure gas through controlled air outlet holes, ensuring smooth loading and demolding processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the carrier uses close contact with the bucket-shaped workpiece to ensure stability, then positioning accuracy is improved, but positive pressure gas accumulates in the sealed cavity causing loading obstruction
Solution Approach 1:
The carrier incorporates air outlet holes that allow the sealed cavity to transition from a completely sealed structure to a controlled porous structure. This enables gas to escape during loading while maintaining close contact between the carrier and workpiece for positioning accuracy.
Solution Approach 2:
The invention extracts the harmful positive pressure gas from the sealed cavity through air outlet holes and breathing valve assemblies. By removing the accumulated gas, the loading obstruction is eliminated while the carrier-workpiece close contact is maintained for stable positioning.
2Object-generated harmful factors
If the negative pressure drawing method is used to release positive pressure gas, then gas release is achieved, but the process time is extended reducing production efficiency
Solution Approach 1:
The breathing valve assembly with counterweight unit is pre-configured on the carrier before loading. During loading, the valve automatically opens when positive pressure exceeds the counterweight force, providing immediate gas release without waiting for negative pressure drawing to begin.
Solution Approach 2:
The breathing valve assembly automatically responds to positive pressure accumulation by opening the air outlet holes. The system serves itself by using the positive pressure gas to overcome the counterweight and trigger its own release, eliminating the need for external negative pressure drawing control.
3Speed
If air outlet holes are provided for gas release, then loading speed is improved, but positive pressure gas may leak during demolding when negative pressure is required
Solution Approach 1:
The breathing valve assembly uses a counterweight unit that balances the forces of positive and negative pressure. During loading, positive pressure overcomes the counterweight to open the valve. During demolding, negative pressure causes the counterweight to close the valve, preventing gas leakage while maintaining the opening during loading for high speed.
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 breathing valve assembly facilitates rapid gas exhaust, improving loading speed and overall production efficiency while maintaining reliable positioning and reducing manufacturing costs.
Implementation Method 1
each of the at least one breathing valve assembly further includes a counterweight unit, the weight of the counterweight unit is greater than the thrust generated by the air flow passing through the air outlet hole during demolding
Implementation Method 2
each of the at least one breathing valve assembly further includes an elastic unit, the elastic unit abuts against the counterweight unit and presses the counterweight unit to cover the air outlet hole
Data Source
AI summary
A pad printing carrier including a bucket mold and at least one breathing valve assembly. The bucket mold is used for holding a bucket-shaped workpiece and defines a cavity, an air inlet hole, at least one air outlet hole, and an airflow channel, the air inlet hole, the at least one air outlet hole, and the airflow channel are communicated with the cavity. The at least one breathing valve assembly is coupled with the at least one air outlet hole and each includes a counterweight unit, the weight of the counterweight unit is greater than the thrust generated by the air flow passing through the air outlet hole during demolding. A transmission device including the pad printing carrier is also provided.