Molding Apparatus Stripping Sleeve Slide Pair Ejection
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Solution Overview
Problem
Current injection molding technologies face challenges in efficiently releasing molded articles from the mold without causing deformation, particularly in ensuring precise alignment and movement of slide pairs and stripper sleeves to facilitate smooth ejection.
Innovation Solution
The molding apparatus incorporates a stripper sleeve configured to open and strip molded articles from the first stack portion, utilizing a slide pair and a system of cams and followers to guide the ejection process, allowing for controlled movement and release of the article from the outer core.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional ejection methods are used, then the molded article can be removed from the mold, but deformation may occur during ejection
Solution Approach 1:
The patent employs a dynamic ejection system where the stripper sleeve and slide pair move in a coordinated sequence. The stripper sleeve first opens to release the molded article from the core, then the slide pair moves to eject the article. This dynamic, staged approach allows the article to be released and ejected in controlled steps, preventing deformation that would occur with static or single-step ejection methods.
Solution Approach 2:
The ejection process is segmented into distinct stages: first the stripper sleeve opens to release the article from the core, then the slide pair moves to eject the article from the mold. This segmentation of the ejection function into separate mechanical elements (stripper sleeve, slide pair) allows each component to perform its specific function without interfering with the other, ensuring reliable ejection while maintaining article precision.
2Ease of operation
If slide pairs and stripper sleeves are used for ejection, then controlled movement is achieved, but alignment precision becomes critical
Solution Approach 1:
The patent uses the stripper sleeve as an intermediary element between the core and the slide pair. The stripper sleeve first interacts with the core to open and release the article, then transitions to work with the slide pair for ejection. This intermediary approach allows the system to achieve controlled movement while reducing the alignment precision requirements between the core and slide pair, as the stripper sleeve mediates the transition and coordination between these components.
3Productivity
If rapid ejection is implemented, then cycle time is reduced, but deformation risk increases
Solution Approach 1:
The ejection process employs periodic action through the staged sequence: the stripper sleeve opens in one phase, then the slide pair ejects in the next phase. This periodic, sequential operation allows each stage to complete its function at optimal speed without compromising the article. The article is released during the stripper sleeve phase, then ejected during the slide pair phase, ensuring rapid overall ejection while maintaining precision through the structured timing of each action.
Data Source
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Figure 3A~3E
AI summary
Disclosed herein is, amongst other things, a molding apparatus, comprising a stripper sleeve (116) for use in a first stack portion (110) of a mold stack (140), wherein the stripper sleeve (116) is configured to open a slide pair (122) of the first stack portion (110) and to strip a molded article (106) from the first stack portion (110).