Custom Plastic Injection Mold Design & Manufacturing Services
Custom Plastic Injection Mold Design & Manufacturing Services - Image 2
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Custom Plastic Injection Mold Design & Manufacturing Services

Custom plastic injection molds by the Moldsteells engineering team — mirror-finish, precision, and two-shot tooling, built for your product.

Tolerance ±0.01 mm
Mirror Finish (SPI A2)
Two-Shot Molding
Overmolding
Moldflow Analysis
DFM Report in 24h
T0 Sample in 3–5 Weeks
Mold Life up to 1M Shots

Guaranteed Safe Checkout
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+86 18002688026
18002688026@163.com

Description

Mold Making Capabilities

A more comprehensive, more professional mold manufacturing solution.

Mold Construction
Max mold weight10 tons
Mold cavities1 – 32+ cavities
Machining tolerance (CNC)±0.01 mm
Wire EDM (micro features)±0.005 mm
Mold baseLKM / custom-engineered
Hot runner systemYudo · Synventive · Mastip
Surface texturingFinish | Polish · VDI · texture · laser optical
Mold Trial & Sampling
Injection molding machines90 – 260 ton clamping force
T1 first article trialIn-house, with FAI report
Spotting press280 ton
CMM (coordinate measuring)2× Hexagon Sire (PC-DMIS)
Typical lead time7 – 8 weeks
DFM turnaround48 hours
MOQ1 mold set

Moldsteells — The Mold Maker That Knows Steel

The right steel for your part — then we build the mold.

Mold steel
Mold steel
Mold steel
Mold steel
Mold steel
Application-Based Steel Selection
Application / resinSteelWhy
Transparent / opticalPC · PMMA · lensNAK80 · S136Mirror polish, no weld marks
Glass-fiber filledPA66+GF · PBT+GFH13 · 8407Abrasion-resistant
Corrosive / flame-retardantPVC · FR gradesS136Corrosion-resistant
High-volume commodityPP · ABS · HIPSP20 · 718HCost-effective
High-gloss cosmeticauto · applianceNAK80SPI A finish

In-house mold steel wholesale

In-house steel heat treatment

The mold maker that knows steel

Not sure which steel fits your resin? We recommend it in the DFM — with HRC hardness and expected mold life.

Get a Quote

Mold Class & Expected Life

Pick the class that matches your annual volume — we recommend it in the DFM, with steel and hardness.

SPI ClassCavity lifeTypical steelHardnessBest for
1011M+ shotsH13 · 8407 · S13650–54 HRCHigh-volume production — automotive, 3C connectors
102≈ 1M shotsH13 · S136 · 420ESR48–52 HRCMid-to-high volume — consumer electronics, optics
103500K shotsP20 · 718H · NAK8038–42 HRCMid volume — appliances, industrial housings
104100K shotsP20 · 718H30–36 HRCLow volume / bridge tooling
105< 500 shotsAluminum · soft steel—Prototype, design validation, sampling

Not sure which class fits your volume? Tell us your annual forecast in the RFQ — we recommend the class, steel, and hardness in the DFM.

Get a free DFM

Surface Finish Options

We handle all five common cavity surface finishes. For other finish types, please contact us.

SPI A Mirror

SPI A — Mirror

Ra 0.025 – 0.10 μm

Diamond polish. Optical / piano-gloss parts. S136 / NAK80 / 420ESR.

SPI B Semi-gloss

SPI B — Semi-gloss

Ra 0.10 – 0.40 μm

Paper polish. Bright but soft. Visible cosmetic parts.

VDI 24-30 Matte

VDI 24 – 30 — Matte

Ra 1.6 – 3.2 μm

EDM matte. Automotive interior baseline, appliance housings.

Texture Engrave

Texture / Engrave

Supplier-standard or custom

Leather / geometric / wood grain. Chemical etch on demand.

Laser Optical

Laser Optical — Iridescent / Diffractive

Nanoscale grating (Ra ≤ 0.1 μm)

Laser-induced structural color. Rainbow effect, no coating. Mirror base: S136 / NAK80 / 420ESR.

Specialty Options

The specialty molds you're looking for are right within our capability.

Two-shot

Two-shot

Two-material / two-color molds

Rotary table or side-action interlock — both built here. Rigid substrate + TPE grip in one cycle.

Mirror

Mirror

SPI A mirror polish

Sodick mirror EDM + diamond polish. Piano-gloss finish on NAK80, S136, 420ESR.

Thin-wall

Thin-wall

Thin-wall molds

High-flow geometry, precision cores, balanced cooling. For packaging, medical, and consumer parts.

Insert Overmold

Insert / Overmold

Insert & overmold tooling

Metal inserts and TPE/TPU overmolding — for seals, grips, and soft-touch parts.

FAQ

Frequently Asked Question

For more information, please contact us
What's the maximum mold weight you can build? +
Up to 10 tons, trialed on our 90–260T machines. Beyond that we'll tell you honestly.
How fast can I get a DFM analysis? +
Within 48 hours of receiving your 3D (STEP / IGES / X_T / PDF). Free, and we'll say straight if the design isn't moldable as-is.
Do you sign NDAs? Who owns the mold? +
NDA before you send any drawing. The mold is yours — paid for, owned, shippable anywhere.
What tolerance can you hold? +
±0.01 mm standard. ±0.005 mm on micro features via Sodick wire EDM.
Which mold class do I need? +
Depends on your annual volume. We recommend the SPI class (101–105), steel, and hardness in the DFM — see the Mold Class table above.
Do you do two-shot, overmolding, hot runner? +
Yes to all. Two-shot (rotary + side-action), insert/overmolding, hot runner (Yudo / Synventive / Mastip).
How are modifications quoted? +
The quote lists what's included (in-spec mods) and what would be extra — you see the line items before we touch steel. No surprise invoices at buyoff.
Minimum order? +
One mold set. Same process whether it's a prototype tool or a 32-cavity production mold.
How is the mold packed for export? +
VCI anti-rust wrap + reinforced plywood crate + container bracing. Ready to install on arrival.
Request a Quote

Send your 3D.
DFM in 48 hours.

A project engineer reviews your drawing and replies with manufacturability feedback, steel recommendation, and timeline — not a sales script.

DFM within 48 hours
Quote within 24 hours of DFM
NDA on request · You own the mold
Your quote includes
Mold cost · T1 samples · in-spec modifications · Moldflow summary · export packing · CMM report

    Get a Quote

    We’ll contact you only about your quotation request. Your details are kept strictly confidential.

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