
Zero draft.
Four sides that release.
A fixed exterior requirement led to four side sliders. Peripheral ribs support and locate the mating panel alongside four screws.
Explore this work
Custom injection molds and plastic part supply for functional housings, soft overmolded components and precision interfaces. We connect your product requirements to tooling and continuing production.
Custom housings, covers and working components. We make the mold and supply the parts, with the visible surface, material behavior and assembly all considered together.

A fixed exterior requirement led to four side sliders. Peripheral ribs support and locate the mating panel alongside four screws.
Explore this work
Component photographs, tooling and colored production batches connect overmolding questions to physical manufacturing.
Explore this work
A cartridge housing with closely spaced outlets and a chip interface. Internal and external slides plus angled core withdrawal replaced a two-mold approach with one production mold.
Explore the mold in 5 steps
A real housing finish made through specialist laser processing of the mold. Explore the appearance decisions and the tooling investment behind it.
Explore this workEngineering reviews of real reference products: the manufacturing questions we would resolve and how we would run a similar project. For implemented CustoMold tooling and production, explore the cartridge case below.

Ribs, mounting datums and any functional coating have to work as one manufacturing route.
Explore the housing review ↗
The overall profile determines whether local clips can meet their mating features together.
Explore the curved-part review ↗Manufacturing case / Actual project CAD
Explore the mold behind our precision cartridge project. Three design views show how we connected the functional interfaces, forming layout and release strategy.

The cartridge’s separate outlet paths and chip interface were brought together in one production mold, replacing the earlier two-mold approach.
Design around the part’s function.The forming steel, side actions and supporting mold structure have to work as a single system.

The exposed forming-side view reveals the central molding region and the slide assemblies around it. Complexity is handled in the tool, where each feature is formed and released.
Resolve access before cutting steel.Closely packed features need a tooling layout that can form them, clear them and return to the molding position.

The underside reveals the angled core-withdrawal layout and its supporting components. Part shape and release strategy have to be considered together.
Connect geometry to a practical release route.Review the internal features and assembly interface together, then carry the design through to molded parts.
Details like these make your product recognizable—and set the priorities for the mold. Explore more of our molded parts and the decisions behind similar manufacturing requirements.

Hole edges, flow joins and flange fit share one visible part.

A common carrier connects four buttons; the stems and gate area still need room to work.

A clean closing line depends on the cover, shell and nearby interfaces working together.

Manufacturing case / Implemented tooling and production
For the ink cartridge project, we brought three separate outlet paths, a precision chip interface and a complex release system into one integrated mold. The redesigned tool replaced the previous two-mold approach and remains in production.
For the enclosure, four side sliders preserved the customer’s zero-draft requirement, while recommended ribs helped support and locate the mating cover.
Explore the case studiesA small factory, directly accountable
Our owner manages projects personally, coordinating toolmaking and molding without layers of departments. Experience at a Taiwanese moldmaker shaped a quality-first approach that carries into material purchasing, mold construction and the decisions made at the machine.
Meet the factory and its standardsWe purchase first-grade virgin plastic and do not use recycled or reprocessed feedstock.
We choose quality mold steel and do not shrink the mold structure simply to reduce the quote.
The project manager is the factory owner, keeping decisions close to tooling and production.
Our ongoing cartridge production and the component batches shown here put physical manufacturing behind the engineering discussion. For your order, fit, appearance, material and packing requirements form the basis for repeat supply.
From mold development to repeat orders
Bring your design, the features you cannot compromise and the quantities you need.