Precision mold design and manufacture
We undertake the design and manufacture of various high-precision molds, leveraging our comprehensive expertise in crafting molds for Medical, Automotive, Telecommunication, Security, consumer electronics, Sports, Musical, Marine equipment, and other industries.
With more than30 years of experience in precision mold design and manufacturing, we can design and manufacture various types of plastic molds, rubber molds, and LSR molds; We are experts in the production of single-color injection molds, double-color and multi-material 2K injection molds & Over molds, LSR injection molds, Silicone compression molds, Flip-top cap molds, silicone keypad molds, and other silicone molds for products such as gaskets, keyboards, membrane keypad and soft medical parts.
In our mold production center, we have a variety of imported high-precision CNC machining centers, spark machines, wire cutting equipment, precision grinders, and other processing equipment, which can make sure that all of the data can be machined precisely and within the drawing spec for our customers.
The strength of our mold design and manufacturing center:
50 Experienced engineers in mold design, mold flow analysis, metal processing, and mold manufacturing. The mold precision can reach 0.005.
20000+ self-produced plastic and rubber molds making collaborating with Fortune 500 companies
30+ years OEM mold and product factory with ISO9001, ISO14001, IATF16949, 6S managing system.
Equipment owned by our mold center
The application of mold flow analysis can meet the needs of different product development and design. Through high-speed carving and cutting (24000rpm), precision mirror discharge, and high-precision wire cutting process technology, combined with 3D CMM(Coordinate Measuring Machine), high-precision, high-quality molds are manufactured.
Production Equipment of Tooling Department
| Item | NO | Equipment Item | Brand | Quantity | Property | |||
| Tachometer/speedometer | Accuracy | MM | ||||||
| Process Equipment | 1 | CNC | ChaoQun | 1PCS | 8000/MIN | 0.01 | 850*650*900 | |
| Frank | 2PCS | 2.4W/MIN | 0.005 | 500*400*400 | ||||
| Seiki | 2PCS | 2.6W/MIN | 0.005 | 600*400*400 | ||||
| Charmilles | 1PCS | 1.4W/MIN | 0.005 | 850*650*400 | ||||
| 2 | Wire-cut machine | Wire-cut | SODICK | 1PC | 0.005 | 300*250*180 | ||
| Charmilles | 1PC | |||||||
| Speediness wire-cut | Jin teng | 1PC | 500*400*350 | |||||
| YIGUANG | 1PCS | |||||||
| YIGUANG | 1PCS | |||||||
| 3 | EDM | SODICK | 1PCS | 0.005 | 500*400*200 | |||
| SODICK | 1PCS | 0.005 | 500*400*200 | |||||
| Charmilles | 2PCS | |||||||
| XingFeng | 3PCS | 0.01 | 600*500*300 | |||||
| TaiYi | 2PCS | |||||||
| 4 | Milling machine | DaYou | 4PCS | 5000/MIN | 0.02 | 800*500*120 | ||
| Heng yu | 2PCS | 5000/MIN | 0.02 | 800*500*120 | ||||
| 5 | Grinding machine | JianDe | 3PCS | 3600/MIN | 0.002 | 450*250*300 | ||
| Hangzhou machine | 1PCS | 3600/MIN | 0.002 | 450*250*300 | ||||
| YuQing | 2PCS | |||||||
| BaoCheng | 1PCS | 3600/MIN | 0.002 | 450*250*300 | ||||
| 6 | Grinding machine | Hangzhou machine | 1PCS | 1400/MIN | 0.002 | 400*1000*300 | ||
| 7 | Turning | XingYuan | 1PCS | 1600/MIN | 0.01 | 1500*300 | ||
Procedure of Mould Flow
From product data and DFM review to tool machining, validation, and stable mass production.
- Stage 01
Product Definition
Part Image
2D Drawing
DFM Review
- Stage 02
Tool Design & Machining
- Mold Drawing
EDM Machining
WEDM Machining
- Stage 03
Finishing & Trial
Polishing
Fit & Assemble Mold- Trial Mold
- Stage 04
Validation & Production
QC Inspection
T1 Sample
Mass Production
Precision Mold Manufacturing Gallery
Explore our mold design, CNC, EDM, milling, assembly, and tooling management capabilities.
Precision Injection Mold Design & Manufacturing: DFM, Moldflow & Tight-Tolerance Tooling
Rilong Precision Mold builds high-precision plastic injection molds, 2K molds, and silicone tooling in Shenzhen, China. Utilizing premium European and Japanese mold steels (S136 ESR, NAK80, 718H, H13), Makino 40,000 RPM high-speed CNCs, AgieCharmilles Mirror EDM, and Zeiss Prismo CMM metrology, we achieve mold machining tolerances of ±0.005mm and part tolerances of ±0.01mm. Every tooling project includes full DFM and Moldflow simulation within 24 hours.
Tooling Machinery, Steels & Manufacturing Capabilities
| Tooling Parameter | Rilong In-House Specifications | Equipment & Inspection Protocol |
|---|---|---|
| Core & Cavity Steel Grades | Uddeholm Stavax S136 ESR (HRC 48-52), Daido NAK80 (HRC 37-43), ASSAB 718H, AISI H13 (1.2344), P20+Ni | 100% certified steel mill certificates with vacuum heat treatment & ultrasonic flaw detection |
| Mold Base Standards | LKM Standard & Custom, HASCO, DME, MISUMI, Meusburger | Hardened leader pins, bronze bushings with graphite plugs, precision taper interlocks |
| High-Speed CNC Milling | Spindle speed up to 40,000 RPM, positioning accuracy ±0.002 mm | Makino V33i & DMG MORI 5-axis machining centers |
| Electrical Discharge Machining (EDM) | Mirror EDM surface finish: Ra < 0.02 μm (SPI A-1), sharp corner radius < 0.02 mm | AgieCharmilles Form 20 / 30 CNC EDM with automated 16-tool electrode changers |
| Slow-Feeding Wire EDM | Cutting accuracy: ±0.0015 mm, surface finish Ra 0.15 μm | Sodick & Seibu submerged wire cutting with 0.1–0.25mm brass/zinc-coated wire |
| 3D Metrology & Quality Control | Volumetric length measurement uncertainty: MPE_E = 0.9 + L/350 μm | Zeiss Prismo CMM, Keyence Optical Projector, 100% full-dimension FAI inspection report |
| Hot Runner Integration | Sequential valve gate & multi-tip systems with PID temperature controllers | Mold-Masters, Yudo, Synventive, Incoe, Husky compatible |
Related Engineering Decision Guides
SPI Mold Surface Finish Standards (A-1 Mirror Polish to D-3) & Rapid Tooling Lead Times
SPI surface finish chart (Ra 0.012–0.025 μm), draft angle rules, S136 ESR steel, and Rilong's 20-day rapid tooling turnaround.
Overmolding Metal with Plastic: Complete DFM, Insert Design & Bonding Guide
Knurling retention geometries, Chemlok primers, CTE mismatch mitigation, and robotic automated insert molding.
2K Two-Shot Injection Molding vs. Overmolding: Cost, Tolerance & Tooling Selection Matrix
Side-by-side comparison of 2K rotary platen tooling vs pick-and-place overmolding, volume break-even, and ±0.01mm tolerances.
Precision Mold Design FAQ
What makes a mold a precision mold?
A precision mold is designed and manufactured to hold tight dimensions repeatedly (tooling tolerances ±0.005mm, part tolerances ±0.01mm) over hundreds of thousands of cycles. It requires hardened ESR tooling steel (e.g. S136, HRC 48-52), precision CNC/EDM/wire cutting, balanced thermal cooling channels, and Zeiss CMM metrology verification.
Why is DFM important before mold manufacturing?
DFM identifies design and tooling risks before steel cutting. It helps improve parting line, draft, wall thickness, ribs, bosses, gate location, ejection, and tolerance strategy, reducing mold correction cost and development time.
How does mold flow analysis improve injection mold quality?
Mold flow analysis predicts filling balance, weld lines, air traps, pressure loss, shrinkage, cooling, and warpage. It helps engineers select gate location, runner balance, venting, and cooling before the mold is manufactured.
What steel grades does Rilong utilize for precision injection molds?
We select premium certified steels including Uddeholm Stavax S136 ESR stainless steel (corrosion resistance & SPI A-1 polish), Daido NAK80 (pre-hardened HRC 37-43 for optical parts), ASSAB 718H, and AISI H13 (HRC 48-52 for high-volume structural production).
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