- Product Basics & Material Selection（产品基础与材料选型）
Q: What materials do you offer for custom rubber parts?
A: We provide full custom rubber materials including:
- NBR: Oil-resistant, wear-resistant, cost-effective for general hydraulic/pneumatic systems.
- FKM/Viton: High temperature resistance, excellent chemical resistance for harsh oil/chemical environments.
- EPDM: Weather, ozone, steam and water resistance for outdoor, plumbing and HVAC.
- Silicone (VMQ): Wide temperature range, food-grade, medical-grade, low compression set.
- PU (Polyurethane): Extreme wear and pressure resistance for hydraulic seals and buffer parts.
- NR/CR: High elasticity, shock absorption, weather resistance for anti-vibration parts.
Q: How to choose rubber hardness?
A:
- Sealing applications: Shore A 50–90°
- Shock absorption & buffer: Shore A 30–60°
Higher hardness = better pressure resistance & wear resistance.
Lower hardness = better sealing & fitting performance.
Q: What tolerance can you achieve?
A:
- Normal molded parts: ±0.1~±0.3mm
- Precision custom profiles & sealing faces: ±0.05~±0.1mm
Tolerance depends on part structure, size and material.
- Design & Structure FAQ（设计与结构答疑）
Q: What should I note when designing custom rubber profiles?
A:
- Avoid sharp corners and ultra-thin walls to prevent tearing or incomplete molding.
- Reserve 1.5%–3% shrinkage according to material.
- Consider compression, torsion and assembly direction to avoid stress concentration.
- Provide 2D/3D drawings for best accuracy.
Q: Why do seals fail or leak?
A: Common causes:
- Improper compression rate (too large → permanent set; too small → leakage).
- Material incompatible with medium (oil, water, acid, alkali, high temperature).
- Installation damage, eccentric wear or wrong groove size.
- Aging, ozone cracking or thermal degradation.
Q: Which seal is right for my equipment?
A:
- Static sealing (no movement): O-rings, gaskets, custom profile gaskets.
- Dynamic reciprocating/rotating: Piston seals, rod seals, oil seals, U-cups.
- High pressure: Combined seals, step seals, anti-extrusion backup rings.
- Irregular cavities: Fully custom molded rubber profiles.
- Production & Customization（生产与定制服务）
Q: What manufacturing processes do you use?
A:
- Compression molding: Mass production, stable quality.
- Injection molding: High precision, small parts, high efficiency.
- Extrusion & vulcanization: Rubber profiles, long strips, special sections.
- CNC machining: Prototypes, small batches, special-shaped parts.
Q: Do you accept custom molds and small orders?
A:
- We support custom mold design and manufacturing.
- Small quantity trial orders & prototypes are available.
- We can also reverse-engineer and reproduce based on samples.
Q: Can you make parts according to customer samples?
A: Yes. We can measure samples, test material properties, and reproduce identical or improved parts.
- Application & Industry Solutions（应用行业解决方案）
Q: What industries do you serve?
A: Hydraulic & pneumatic, automotive, machinery, food & beverage, medical, HVAC, plumbing, outdoor equipment, packaging, drilling machinery, laser equipment, etc.
Q: Which material for food/medical equipment?
A: Food-grade silicone, EPDM with FDA, food-safe certifications, non-toxic, odorless.
Q: Which material for high-temperature or steam use?
A: Above 120℃ → FKM; -60℃~200℃ → Silicone; saturated steam → EPDM.
Q: Which material for hydraulic & oil systems?
A: NBR, PU, FKM with backup rings for high pressure anti-extrusion.
- Order & Quality FAQ（订单与质量常见问题）
Q: What documents do I need to provide for quotation?
A: 2D drawing (PDF/DWG), 3D model (STEP/IGS), material, hardness, quantity, working condition.
Q: Do you provide testing and certificates?
A: Yes, including material reports, hardness test, dimensional inspection, pressure test, food-grade/medical-related certifications as required.
Q: What is your lead time for samples and mass production?
A:
- Samples: 3–10 days
- Mold opening: 7–15 days
- Mass production: 10–30 days based on quantity