Die Slide Injection Molding Part Retention
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Solution Overview
Problem
In die slide injection molding, it is challenging to ensure that parts with complex internal constructions remain on the specified side when opening the mold, leading to obstruction in the molding process and reduced productivity in manufacturing liquid-ejecting heads.
Innovation Solution
A method involving a main mold and a sliding die mold, where a push-out mechanism applies force to at least one part to ensure proper alignment and separation, using a combination of push-out mechanisms and springs to stabilize the positioning of parts during the molding process, allowing for efficient joining of liquid-supply units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If parts with complicated internal construction are molded using die slide injection molding, then manufacturing precision and ease of manufacture are improved, but separation resistance becomes unbalanced causing parts to remain on the wrong side during mold opening
Solution Approach 1:
The invention introduces asymmetric auxiliary retention protrusions on one mold and corresponding retention grooves on the other mold. These asymmetric features create differential retention forces that compensate for the unbalanced separation resistance caused by complicated internal constructions, ensuring predictable part assignment during mold opening.
Solution Approach 2:
The auxiliary retention protrusions and grooves act as intermediary mechanical features that mediate the separation process. These intermediaries provide controlled retention and release mechanisms that override the natural tendency of parts to adhere to the side with more complicated geometry.
2Reliability
If parts remain on the wrong side during mold opening, then the molding process progression is obstructed and productivity decreases
Solution Approach 1:
The auxiliary retention features are designed to preliminarily establish the correct part-mold relationship before mold opening occurs. By pre-configuring the retention protrusions and grooves, the system ensures that parts are automatically positioned on the correct side during the opening process, preventing obstructions before they occur.
3Ease of operation
If push-out mechanism applies force to parts, then part separation and alignment are stabilized, but device complexity increases
Solution Approach 1:
The retention mechanism is segmented into separate auxiliary protrusion features on one mold and corresponding groove features on the other mold. This segmentation allows the retention function to be integrated into existing mold structures without requiring a single complex push-out mechanism, thereby reducing overall device complexity while maintaining control capability.
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
This method stabilizes the separation of parts during mold opening, preventing obstruction and enhancing the productivity of liquid-ejecting head manufacturing by ensuring accurate alignment and connection of complex internal structures.
Implementation Method 1
a push-out mechanism that applies a force to at least one of the first part and the second part
Implementation Method 2
using a combination of push-out mechanisms and springs to stabilize the positioning of parts
Data Source
AI summary
Provided is construction that in die slide injection molding, surely leaves each part in a mold on a specified side in the stage of opening a molding mold. In order to accomplish this, in an opening step, a push-out mechanism that applies a force on at least one of the individual parts is used to make the part surely belong to a desired mold.