Study on residual stress effects to cracking in the injection molding product—a case study of CPVC male threaded adapter fittings with copper insert
Bibliographic record
Abstract
Metal/alloy insert threaded polymer fittings are currently being widely used due to their outstanding advantages due to the combination of mechanical properties between polymers and metals/alloys. However, research and literature on metal insert thread adapter fittings are still limited nowadays. This study focuses on chlorinated polyvinyl chloride (CPVC) male threaded adapters with copper insert and their cracking for the purpose of conducting an insert threaded fitting literature. Crackings are generated by residual stresses accumulating internally over time, unobservable immediately after creating products. This study has discovered cracking by experiment and reduced residual stress by optimizing process parameters via the Taguchi method and mold–insert temperature survey, based on the Moldex3D simulation model. Furthermore, dimensional accuracy is ensured through the warpage displacement assessment. These methods could assist manufacturers in getting pilot-run samples to determine the suitable process parameters, ensuring the longevity of CPVC male threaded adapters with copper insert in particular and piping systems in general.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.001 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".