স্বচ্ছ PVC মোল্ডিং বিকৃতি: shrinkage, warpage ও material প্রশ্ন আলাদা করুন
স্বচ্ছ part বাঁকা হওয়া বা dimension বদল diagnosis নয়। সময়, দিক, অবস্থান ও controlled baseline তুলনা করুন।
ঘটনা চিহ্নিত করুন
Ejection, cooling, storage বা assembly-এর পরে কখন পরিবর্তন হয় লিখুন এবং good ও affected part-এ একই datum মাপুন।
Repeatability দেখুন
Cavity, gate, wall change, insert, cooling, restart, colour ও lot অনুযায়ী তুলনা করুন। একটি cavity-তে স্থির হলে mold ও line আগে দেখুন।
Controlled comparison
Lot, mold/cavity, drawing, machine record, cooling ও evaluation time স্থির রাখুন; প্রতি trial-এ একটি variable বদলান।
সম্মত মাপ
সম্মত feature, method, condition এবং acceptance criterion ব্যবহার করুন; শুধু চোখে তুলনা করবেন না।
Trial input
Drawing/sample, material form, intended process, cavity/gate, clarity reference, unit-সহ quantity, measurement method ও acceptance criterion পাঠান।
Diagnostic and escalation matrix
| Observation / decision | Evidence to keep | First low-risk check | Escalate when |
|---|---|---|---|
| Curl at ejection or one fixed cavity | Cavity, gate direction, part location, good reference | Compare cavity/gate, thickness transition, cooling and ejection record | It repeats in a controlled run: mold review |
| Dimension moves after cooling or storage | Datum, time, environment, good/affected retained parts | Re-measure the same feature at the agreed time and condition | It follows a lot after other branches are excluded: supplier/lab comparison |
| Transparency changes with deformation | Clarity reference, lot, packaging, flow photos | Confirm identity, contamination and lot record | A composition or compliance question needs actual samples and method |
RFQ পাঠান
নিয়ন্ত্রিত sample brief মেলাতে part ও trial তথ্য পাঠান।
RFQ পাঠানTechnical basis and further reading
- ASTM D955 — molding shrinkage measurementUse these references to structure inspection and measurement; confirm the actual part under the agreed method and condition.
- ASTM D2633 — thermoplastic wire and cable insulation/jacketsUse these references to structure inspection and measurement; confirm the actual part under the agreed method and condition.
- Gardi et al. (2026) — plasticized PVC thermal-degradation reviewUse these references to structure inspection and measurement; confirm the actual part under the agreed method and condition.
- Alphagary PVC Extrusion Processing GuideUse these references to structure inspection and measurement; confirm the actual part under the agreed method and condition.