Rotational Gib Lifter Assembly for Crowded Mold Ejector Systems
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional lifter systems face difficulties in assembly due to crowding and complexity, especially in large molds, where ejector systems are cumbersome to assemble and prone to parts disengaging or falling, leading to wear, misalignment, and component breakage, and they occupy excessive space within the mold.
Innovation Solution
A lifter design featuring a cylindrical gib with rotational travel and 2-detent mechanism that allows for Y-axis movement, reducing the footprint and enabling self-alignment and secure positioning of components, compatible with existing systems, allowing for retrofitting without machining, and assisting in both large and small mold assemblies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional sliding lifter designs are used, then assembly is straightforward, but parts disengage and fall during assembly, causing wear, misalignment, and component breakage
Solution Approach 1:
The detent mechanism is pre-configured in the gib assembly to automatically engage with the core blade during the assembly process. This preliminary positioning action prevents the core blade from disengaging or falling before the final assembly is complete, eliminating the need for careful manual positioning and reducing assembly difficulty.
Solution Approach 2:
The detent mechanism provides self-aligning and self-positioning functionality during assembly. As the core blade is inserted, the detent automatically engages to hold it in the correct position, allowing the assembly to service itself without requiring additional manual intervention or complex alignment procedures.
2Adaptability or versatility
If extensive angled machining is performed for large molds with large undercuts, then the lifter can handle large undercuts, but assembly becomes cumbersome and requires two people
Solution Approach 1:
The detent mechanism is pre-installed in the gib assembly before the core blade is inserted. This preliminary configuration allows a single operator to easily insert and position the core blade, as the detent automatically engages to hold it in place, eliminating the need for a second person to guide and secure the component during assembly.
3Reliability
If bushings guide ejector plates, then the system provides guidance, but worn bushings cause misalignment, leading to bent core blades and component breakage
Solution Approach 1:
The rotational gib mechanism with detent provides self-aligning functionality that automatically compensates for worn bushings or misalignment. As the core blade moves through the gib, the rotational capability allows the system to self-adjust and maintain proper alignment, preventing bent core blades and component breakage even when bushings are worn.
4Area of moving object
If conventional lifter designs with wide footprint are used, then the system provides sufficient space for components, but the mold becomes crowded with ejector pins and support pillars
Solution Approach 1:
The gib and core blade are integrated into a unified rotational mechanism where the core blade rotates within the gib assembly. This merging of functions allows the ejector plates to be positioned more efficiently, reducing the overall footprint of the lifter system and freeing up space in the mold for other components.
Data Source
AI summary
A lifter system and apparatus having a rotational gib for molding plastic parts, in large mold machines or small mold machines. A core blade is movably mounted with respect to a mold. A gib, such as a rotational gib, is mounted with respect to an ejector plate of the mold. A rotational mount is fixed with respect to the gib. The core blade can be moved and releasably locked at or into different positions with respect to the gib. The rotational mount can be releasably locked with respect to the gib. A detent, a bias element and a spherical surface or other contact surface can be used to hold or fix a position of the core blade with respect to the gib. A second detent, a second bias element and a second spherical surface or other contact surface can be used to hold or fix a position of the rotational mount with respect to the gib.