Drawing & Sample-Based Plastic Mold Development Communication Standard Process

Drawing and sample customized mold development is the mainstream cooperation mode for consumer electronics, automotive and new energy plastic parts. A complete standardized docking process can eliminate information deviation between customers and mold manufacturers, reduce repeated mold revisions, shorten development cycles, and realize closed-loop management from data reception to post-delivery after-sales. All communication links retain written confirmation records to avoid disputes caused by oral communication, and fully meet PPAP and mass production delivery requirements.

1. Client Data Collection & Complete Information Verification

Business coordinators classify customer materials into digital drawing files and physical samples for unified sorting. For drawing data, check complete 3D models, 2D drawings with full dimensional tolerances, appearance standards, plastic material grades, annual output, mold service life, automation configuration and TS16949 certification demands. For physical samples, record inherent defects such as sink marks and flash, as well as customer improvement demands, surface post-processing technologies including painting, electroplating and IMD, and matching assembly accessories.

All commercial terms such as delivery date, quotation scope and sample receiving address are recorded in written files. If drawings have missing dimensions or samples have incomplete structures, a supplementary inquiry list will be fed back to the customer within 24 hours; no technical evaluation will be launched with incomplete materials.

2. DFM Analysis & Formal Quotation Confirmation

Structural engineers, mold flow analysts and quotation staff jointly carry out manufacturability evaluation. Targeted optimization suggestions are put forward for wall thickness, draft angles, snap undercuts and A-level appearance surfaces, matched with mold flow simulation predictions of molding defects such as deformation and air traps. The cavity quantity, cold/hot runner scheme and automatic ejection configuration are determined according to customer output, and mold steel, standard parts and surface treatment processes are selected.

The formal quotation details the cost of mold base, cavity inserts, hot runner, machining and trial molding, attached with DFM analysis report and simplified mold structure sketches. Adjust the scheme and quotation repeatedly according to customer feedback until both parties sign a formal development contract to lock all technical and commercial clauses.

3. Complete Mold Design & Customer Drawing Signature Approval

After the contract takes effect, designers complete mold 3D assembly drawings, 2D machining drawings, cooling circuit layout, ejection system diagrams and standard part BOM. For automotive-grade products, supplementary mold flow analysis and preliminary PFMEA documents are compiled. Internal self-inspection is completed before sending all design files to the customer for written signature confirmation; all machining work is prohibited without customer approval.

All customer structural adjustment demands trigger drawing version updates with complete change records, and only the final signed drawing version is used as the unified standard for subsequent processing, trial molding and acceptance.

4. Phased Machining Progress Synchronization

Project specialists take the four core nodes of rough machining, heat treatment, precision finishing and mold assembly to regularly synchronize progress with customers. For outsourced processes such as heat treatment and PVD coating, material certificates and hardness test reports are provided synchronously. If machining difficulties or material supply delays occur, communicate with customers immediately to negotiate solutions without unauthorized modification of mold structures. After internal pre-assembly inspection, send mold assembly videos to customers and confirm the first trial molding schedule and raw material specifications.

5. Multi-Round Trial Molding, Defect Rectification & Sample Sealing Confirmation

Carry out staged T0/T1/T2/T3 trial molding with clear verification objectives. T0 verifies basic filling and ejection structures to solve fundamental defects such as short shots; T1 and T2 optimize dimensional accuracy and assembly performance, and send trial samples to customers with defect lists and rectification comparison pictures. T3 final trial requires stable continuous production with fully qualified full-size inspection, and both parties sign and retain sealed samples as the mass production acceptance benchmark. All customer feedback on unqualified products will trigger mold modification and re-testing until written sample approval is obtained.

6. Final Mold Inspection, Document Handover & After-Sales Docking

Before delivery, inspect cavity dimensions, cooling circuit smoothness and safety limit functions, and package spare parts such as ejector pins and sealing rings. Complete delivery documents include mold drawings, material certificates, mold flow analysis, DFM, PFMEA and full-size inspection reports; automotive orders are attached with complete PPAP files. After logistics delivery, provide on-machine debugging technical support, clarify mold warranty scope and modification charging standards, and assign special contact persons to respond to mold failure problems during customer mass production.

Summary

The standardized drawing and sample mold docking process forms a full closed loop covering data sorting, DFM evaluation, design approval, production tracking, staged trial molding and after-sales service. Written confirmation and complete change archives eliminate communication misunderstandings. Early complete data sorting and manufacturability analysis fundamentally reduce mold revision costs, phased progress synchronization and multi-round trial molding guarantee stable product quality, and complete technical document handover and dedicated after-sales support ensure uninterrupted mass production for customers.