Many customers ordering custom phenolic resin parts for the first time don't know what the full process looks like or what problems might arise along the way. This article systematically walks through the complete custom manufacturing process accumulated over 15 years, so you know what to expect before sending that first drawing.
Step 1: Send Your Drawing or Sample
Supported drawing formats (by preference):
Always include when sending: required material grade, quantity, delivery timeline, and working conditions (temperature, pressure, medium).
Step 2: Technical Review (1-2 Business Days)
Upon receiving your drawing, we conduct the following assessment:
- Material Suitability: Are drawing requirements reasonable? Is material selection appropriate?
- Mold Feasibility: Can existing molds be modified, or is a new mold needed?
- Dimensional Tolerances: Are drawing tolerances achievable? Need to confirm with customer if not.
- Cost Estimate: Mold cost (if new), unit price, total order value.
We will respond: can produce / drawing needs revision / cannot produce (with reason). Over 15 years, we've declined many unreasonable custom requests — that's good for both of us.
Step 3: Prototyping (7-15 Business Days)
After confirming the plan, sample fees apply (in case of new mold development). During prototyping:
- New mold: Small batch (5-50 pieces) for validation
- Mold modification: Quick adjustment followed by samples
- Sample inspection: Full dimensional inspection per drawing, inspection report provided
Mold development is a major cost for the factory. For new molds, we charge a mold fee plus sample fees. Mold fees can be credited against the order value after sample approval.
Step 4: Customer Approval
Upon receiving samples, please check:
- Does appearance meet requirements (color, surface finish)?
- Are dimensions within tolerance (we provide inspection report)?
- Does functionality meet application needs (assembly test, performance test)?
If modifications are needed, clearly mark the changes. Resubmit for modified sample or micro-adjustment. Upon approval, sign the purchase contract.
Step 5: Mass Production
After sample approval, mass production begins:
Tips to Avoid Pitfalls
- Don't specify tolerances too tight: Unnecessarily strict tolerances increase cost. ±0.05mm is usually sufficient for general mechanical parts.
- Be specific about material: Don't just write "phenolic resin" — specify the exact grade or performance requirements.
- Order a reasonable sample quantity: Don't order just 1 piece. At least 5-10 pieces are needed to verify dimensional stability.
- Build in buffer time: Rush orders incur expedite fees. Planning ahead saves significant costs.
Send me your drawing and I'll provide an assessment. Email: 15503295692@163.com
Contact Liu