Products · Injection mold

Segmented insert mold construction

Segmented insert construction with engineered venting — for parts that trap gas or need individually replaceable cavity detail.

  • Made in-house in Dongguan, China
  • Mold work to ±0.01 mm
  • 30 presses 20T–300T on site

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Segmented insert injection mold in a blue mold base with two flat molded parts in front
Photographed in our plant in Humen, Dongguan

Venting is invisible in a quotation and decisive in a trial. Air trapped at the end of fill causes burn marks, short shots and flash at the wrong places; insert construction with machined vents, split sections and replaceable blocks solves it without making the tool fragile.

This tool shows segmented inserts in a machined pocket — a construction that lets a worn or damaged section be remade on its own. We decide vent depth and land width from the resin (low-viscosity grades and gas-prone materials need more), and check the result on the trial part rather than relying on theory alone.

Typical applications

  • Gas-prone and filled resins
  • Thin-wall parts
  • Wear-resistant tooling
  • Parts needing replaceable detail

Specification

What this class of tool is built to

Our standard specification for this type of tooling, confirmed line by line on the mold design approval sheet before machining starts.

Standard tooling specification — confirmed on the mold design approval sheet
Mold constructionTwo-plate, three-plate, hot runner, stack or family — specified per part
Cavity countSingle or multi-cavity, sized to annual volume, cycle time and press tonnage
Mold steelsP20, 718H, NAK80, S136, hardened H13 / SKD61 cores
Mold work tolerance±0.01 mm
Machine accuracyDown to 0.001 mm (Yasoda, OKUMA, GF, Makino)
RunnerCold runner, hot runner or valve gate
Surface finishSPI A1–D3, bead blast, leather grain or your texture
CoolingMachined circuits; baffles or bubblers where geometry requires
EjectionPins, sleeves, stripper plate, lifters, unscrewing or collapsible core
VerificationSwiss Hexagon CMM and Zeiss Contura; dimensional report at T1
Molding30 presses from 20T to 300T, in the same building
Documentation2D/3D drawings, steel and component certificates, parameter sheet, spare parts
Lead timeTypically 15–30 days of machining after design approval
Tool ownershipYours — the tool is designed to be transferable

Values above are our standard capability for this class of tool, not fixed figures for a specific project. Cavity count, steel grade, runner type and finish are agreed with you on the design approval sheet before any steel is cut.

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Next step

Ask for a DFM review and a price for your part

STEP/IGES/X_T files, the resin, your annual volume and target market are enough to get a mold price, a cycle estimate and the risks we can see — usually in 1–2 business days.