Custom injection molding · Greenville, South Carolina

From sprue to finished part.

Meridian designs the tool, builds it, proves it and runs production on it — custom injection molding, mold design, prototyping, overmolding, insert molding and assembly from one shop in Greenville.

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Greenville, South Carolina Design through assembly Quote from a print, model or sample

Tool cross-section Cavities 01–03

A balanced runner fills every cavity at the same moment, at the same pressure. It is how a mold is judged before a single part is sold.

01 — Capabilities

Every capability branches from one source.

Design decisions made at the tool carry straight through to the parts coming off the press. One shop, one path, no re-interpretation of the print between stages.

Six capabilities · one flow path

01 / Custom injection molding

Production parts, cycle after cycle

Tooling built around your part geometry, your resin and your volume, then run to a process that holds the part to the print.

02 / Mold design

The runner is designed, not guessed

Tool layout, gating, cooling and ejection are settled before the first cut of steel, so flow is a decision on the drawing rather than a surprise at the press.

03 / Prototyping

A real part in your hand, early

Molded samples that prove geometry, fit and function while the production tool is still on the bench.

04 / Overmolding

Two materials, one cycle

A second material molded onto a substrate in the same shot, for grips, seals and soft-touch surfaces that would otherwise be assembled later.

05 / Insert molding

Metal where the part needs strength

Inserts placed and encapsulated in the mold, so threaded bosses, bushings and structural features come out as one finished component.

06 / Assembly

Parts that leave as a component

Work after the press — joining, hardware, inspection and packing to your print.

Ready to run a part?

Send the drawing, the sample or the idea. Tell us the resin, the volume and the timeline, and we will come back with a molding plan and a quote.

Request a quote

02 — Tooling and design

Decisions get made in steel.

How material travels through a mold determines how the part looks, how it measures and how long the cycle takes. Gate location, runner balance, wall thickness and cooling are settled at the tool, not corrected at the press.

We work the part and the tool together, so the drawing you approve is the part that ships.

Gate location

Where material enters decides how the part fills and where weld lines land.

Runner balance

Every cavity fills at the same moment, at the same pressure.

Cooling layout

Even cooling holds dimensions and takes time out of the cycle.

Ejection strategy

Parts leave the tool clean, without drag marks or added stress.

Precision machined mold core with polished cavities on a bench — Mold core, benched and checked before sampling

03 — Process

One path, design to finished part.

Nothing gets skipped and nothing gets handed to a stranger. Each stage runs into the next, and every stage is still working to the same set of dimensions.

Technician checking settings at an injection molding press during a production run — Press side · sampling and production

01

Design

Part and tool reviewed together — gating, runner layout, cooling and ejection resolved on paper first.
02

Prototype

A first shot that proves geometry, fit and function before the production tool is committed.
03

Build

The production tool is cut, spotted and sampled, then dialled in until the runner behaves as it was designed to.
04

Run

Molding to your resin, colour, finish and tolerance, with the process held steady from run to run.
05

Assemble

Inserts, joining and inspection after the press bring the part out as a finished component.

Row of injection molding machines running in a clean production hall

Greenville, South Carolina

04 — Inside the plant

Resin in, parts out, to the print you approved.

Meridian Injection Molding runs custom injection molding, mold design, prototyping, overmolding, insert molding and assembly from Greenville, South Carolina — the whole path from sprue to finished part under one roof.

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05 — Request a quote

Tell us what the part has to do.

Send a print, a model or a sample part and we will come back with a molding plan and a quote.

Part Drawing, model or sample part
Resin Material or the properties you need
Volume Prototype quantities or production
Timeline When the parts need to be in hand

Freshly molded plastic components sorted on a workbench — Molded parts, off the press