Injection Molding Tool Holder Drive Coupling
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Solution Overview
Problem
Existing injection molding tools face challenges in flexible holder movement with high design effort and energy supply issues, particularly with permanent coupling between holders and drives, leading to inefficiencies in positioning and increased costs.
Innovation Solution
A temporary coupling system between holders and drives, utilizing swivel arms or traction drives, allows for variable increments and precise positioning without the need for synchronization, reducing energy supply and signal transmission complexities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a permanent coupling between holder and drive is used, then the holder can be moved reliably, but the design effort and complexity increase significantly
Solution Approach 1:
The coupling between holder and drive is made dynamic rather than permanent. The holder can be selectively coupled to the drive at different positions around the central tool part, allowing the system to adapt its configuration based on operational requirements. This dynamic coupling reduces design complexity while maintaining reliability through controlled engagement.
Solution Approach 2:
The drive system is segmented into multiple independent drive units arranged around the central tool part, with each drive capable of independently coupling to holders. This segmentation allows flexible positioning and reduces the complexity of any single drive unit while maintaining overall system reliability.
2Measurement precision
If each holder has its own servo drive, then individual positioning is achieved, but energy supply and signal transmission become problematic
Solution Approach 1:
A single drive unit is designed to perform multiple functions by sequentially coupling to different holders and moving them to different positions. This multi-functional approach maintains precise positioning capability while eliminating the need for separate energy supply and signal transmission systems for each holder.
Solution Approach 2:
The drive system uses the rotational movement around the central tool part as its own means of positioning, eliminating the need for complex energy supply and control signal systems. The mechanical advantage of the rotational system provides inherent positioning capability.
3Reliability
If a single belt drive is used to firmly couple all holders, then synchronized movement is achieved, but variable increments are not possible
Solution Approach 1:
The coupling between drive and holders is made dynamic, allowing holders to be selectively engaged at different positions. This enables variable movement increments while maintaining synchronization through controlled engagement and disengagement of holders with the drive system at different rotational positions.
4Reliability
If drives are arranged on two sides of the injection molding tool, then synchronization is achieved, but costs and complexity increase
Solution Approach 1:
Multiple drive functions are merged into a single drive unit that operates around the central tool part. This single drive can sequentially couple to different holders and move them to different positions, achieving synchronization without requiring separate drives on both sides of the tool, thereby reducing complexity and costs.
Data Source
AI summary
An injection molding tool has a central tool part and two lateral tool parts which are shiftable relative to each other between an open and a closed position. At least one injection molding cavity is defined by a central mold part which is arranged on the central tool part, by a lateral mold part which is arranged on the lateral tool part, and by a movable mold part which is mounted on a holder. The holder is shiftable around the central tool part between various positions by using a drive. The holder can be coupled with the drive in a controlled manner.