1.Design document specifications: the first step to success or failure
Accurate design documents are the cornerstone of prototype quality, and the following should be paid special attention to:
- Format requirements
Prioritize providing STP/STEP format (best compatibility) and avoid using the original format of the design software - Integrity Check
Ensure that the 3D model has no broken surfaces, missing parts or interferences. Complex assemblies require exploded views. - Tolerance marking
The tolerance requirements for key matching dimensions must be clearly defined (Mingmei CNC conventional accuracy is ±0.05mm)
Experience warning: Design drawing errors can lead to processing failure or dimensional deviation, causing project delays
2.Scientific decision-making on material selection
Matching materials to validation targets is key to reducing costs:
| Verification Objective | Recommended Materials | 1Toptech Solution |
| Appearance Validation | ABS, PMMA, Photosensitive Resin | 200+ color palette spray paint library, supports matte/metallic/transparent effects |
| Structural Testing | PC, POM, 6061 Aluminum Alloy | High-rigidity material processing, assembly position accuracy ±0.05mm |
| Functional Prototype | Nylon, PEEK, Stainless Steel | Professional processing solutions for heat-resistant/wear-resistant materials |
Tips for avoiding pitfalls: Avoid gluing POM, nylon, and aluminum alloys, and use mechanical fixing structures
3.Accurate matching of processing technology
1.CNC processing (our core technology)
- Advantages
- ±0.05mm high precision, genuine materials, excellent surface quality
- Applicable
- Structural verification, assembly testing, small batch production
2. 3D printing (rapid verification solution)
- SLA photosensitive resin
- 0.05mm layer thickness, suitable for fine appearance parts
- SLS Nylon
- Unsupported complex inner cavity structure
Note:
3D printed parts need post-processing to improve surface quality
4.Control the key details of post-processing
Bonding process
The amount of glue used must be precisely controlled. Too little glue will cause cracking, and too much glue will increase the grinding cost.
Surface treatment
Oil spraying needs to control dust spots (dust-free workshop), and electroplating needs to prevent bubbling (pre-treatment cleanliness)
Special Requests
Avoid obvious glue marks and bubbles when bonding acrylic
5.Practical skills for assembly verification
- Reserve 0.1-0.2mm assembly gap (slightly larger than the design value)
- Complex structures are assembled after being processed in parts
- Provide assembly guidance video/graphic instructions
6.Confidentiality and Intellectual Property Protection
During the prototyping stage of new products, it is easy for competitors to obtain information. You need to take the following measures:
- Sign a non-disclosure agreement (NDA) to limit the number of people who have access to the drawings
- Choose a manufacturer that completes all processes independently (Mingmei processes all processes in-house)
7.Three major strategies for cost control
- Simplify the structure of non-critical parts (such as hidden surfaces)
- ABS+injection is used to replace metal materials for exterior parts
- Small batches of less than 50 pieces use silicone mold technology (cost reduction of 40%)
8.The Gold Standard for Supplier Selection
- Process transparency
- Provide photo/video feedback of the processing process
- Response speed
- 24-hour technical Q&A (Mingmei standard service)
- Equipment Capabilities
- CNC machining center + 3D printing equipment collaborative guarantee
