Nylon is one of the most widely injection molded engineering thermoplastics, but its unique processing characteristics—moisture sensitivity, narrow melting range, and rapid crystallization—require specific knowledge to achieve consistent quality.
Material Preparation: Drying is Critical
| 등급 | 건조 온도 | 시간 | 목표 수분 함량 |
|---|---|---|---|
| PA6 | 80°C | 4~8시간 | < 0.10% |
| PA66 | 80°C | 4~8시간 | < 0.10% |
| PA6 GF30 | 80°C | 4-6 hrs | < 0.05% |
가공 매개변수
| 매개변수 | PA6 | PA66 | PA6 GF30 |
|---|---|---|---|
| 용융 온도 | 240-270°C | 270~300°C | 250-280°C |
| 금형 온도 | 60~90°C | 80~100°C | 80~100°C |
| Injection Pressure | 70-120 MPa | 80-140 MPa | 80-150 MPa |
Mold Design for Nylon
Gate Design
Gate size should be 50-75% of wall thickness. Position gates to ensure uniform flow and minimize fiber orientation issues in glass-filled grades.
감정 털어놓기
Proper venting is essential—nylon’s low viscosity means it fills quickly and can trap air. Vent depth of 0.01-0.03mm is typical.
흔히 발생하는 결함 및 해결 방법
| 결함 | 원인 | 해결책 |
|---|---|---|
| Splay/Silver Streaks | 수분 | Dry material properly |
| Brittle Parts | Overheating | Reduce melt temp; verify drying |
| 뒤틀림 | 불균일한 냉각 | Adjust mold temp; optimize gate |
| 플래시 | Low viscosity | Reduce injection speed |
Post-Molding Handling
Moisture Conditioning
Nylon parts are at their most brittle straight out of the mold. Accelerated conditioning in 50-80°C water for 1-4 hours improves impact resistance and toughness.
당사의 역량
~을 넘는 CNC 기계 300대, 우리는 ○○ 이상 생산하며 하루 10,000개 허용 오차가 ±0.005mm. 다음을 접수합니다 최소 주문 수량(MOQ): 1개부터, 배송 기간은 ~ 24시간에서 15일. Our injection molding expertise covers all nylon grades with rigorous quality control. 24시간 이내에 견적을 받아보세요.
This nylon injection molding guide focuses on pellet drying, process stability, mold design, reinforced grades and inspection evidence.
Process Checks Before Nylon Molding Parameters Are Approved
- Drying temperature is copied from a generic nylon chart without checking the exact grade, pellet moisture, dew point, or residence time.
- Melt and mold temperatures are changed together, so the team cannot identify whether moisture, shear, filling, or cooling caused the defect.
- A parameter window is recorded without tying it to cavity fill, packing, cycle time, warpage, and conditioned dimensions.
- The material choice is made after the mold design even though unfilled PA, PA-GF20, and PA-CF30 can change flow, shrinkage, wear, and fiber orientation.
How Nylon Plastic Supports the Project
Nylon Plastic has worked across custom compounding, injection molding, CNC machining, and 3D printing since 2005. A useful molding review connects pellet condition, mold design, process settings, sampling, and inspection rather than treating a parameter table as a production guarantee.
- Review the drawing, material, quantity, critical features, and service environment before quotation.
- Connect samples, dimensional reports, material documents, traceability, and acceptance criteria to the same revision.
- Use custom compounding, injection molding, CNC machining, or 3D printing when the application requires a different route.
관련 읽기
- 나일론 사출 성형 서비스
- Nylon Material Selection for Injection Molding
- Splay Troubleshooting Guide
- Injection Molding Wall Thickness
자주 묻는 질문
How dry should nylon pellets be before injection molding?
Use the exact grade supplier’s moisture specification, drying temperature, time, and dew point. Verify moisture at the machine because a generic drying setting is not a substitute for grade-specific control.
Which nylon molding parameters matter most?
Pellet moisture, melt temperature, mold temperature, injection speed, pressure, packing, cooling, screw recovery, and cycle time all interact. Change one controlled variable at a time and link the result to part inspection.
How do glass-filled or carbon-filled nylon grades change molding?
Reinforced grades can change flow, shrinkage, fiber orientation, surface appearance, weld-line strength, tool wear, and warpage. Review the exact grade and geometry before freezing gates and process settings.
What should be included in a nylon molding process review?
Send the CAD, drawing, grade or candidates, annual volume, appearance zones, critical dimensions, defect history, mold details, target cycle, inspection condition, and required material documents.
Request a Nylon Injection Molding Process Review
Send the part files, grade, volume, defect history, and critical dimensions for a drying, DFM, process-window, and inspection review.
