01
DFM & Engineering
Review geometry, wall thickness, draft, and parting lines before tooling begins so avoidable risks are resolved early.
Turn practical ideas into reliable molded parts.
For everyday products, functional components, and enclosures, Zhong Shi Tong Industrial brings 17+ years of injection molding experience into one clear path from tooling to delivery.
Design for molding Repeatable production Ningbo supply chain
17+ Years in molding
Ningbo Manufacturing base
1:1 Project support
24h Typical reply
What we do
From one drawing to a production-ready part.
General injection molding is more than filling a tool. It is the daily work of balancing geometry, appearance, cost, and timing.
02
Tooling & Mold Making
CNC, EDM, fitting, and mold trials for prototype runs, repeat production, and long-term maintenance.
03
Injection Molding
General-purpose molded parts for household products, consumer goods, tools, enclosures, and functional components.
04
Finishing & Assembly
Painting, pad printing, screen printing, ultrasonic welding, inserts, and straightforward assembly through one project window.
How projects move
Every step has a clear next step.
We break the manufacturing journey into decisions you can review, approve, and track without guesswork.
Start a project conversation 01
Send Your Project
Share a drawing, 3D file, sample, or a clear description of the part and its intended use.
02
DFM & Quotation
We review material, geometry, tooling approach, finish, volume, and the commercial path forward.
03
Tooling & T1 Samples
The mold is built to the approved design, then first-off samples are checked and refined with you.
04
Production & Delivery
After approval, we run, inspect, pack, and release parts against the agreed production plan.
Applications
One process, adapted to the product in front of you.
From daily-use goods to functional housings, we look at environment, material, finish, and volume together.
Why work with us See how we work
A manufacturing partner that stays close to the part.
We are based in Ningbo and support general injection molding programs with one connected communication chain across engineering, tooling, molding, and delivery.
Review the design early and reduce avoidable tooling risk.
Release production against approved samples and traceable checkpoints.
Coordinate packaging, labeling, and delivery for different markets.
17+ Years in injection molding
Ningbo Manufacturing & supply base
1:1 Project communication
24h Typical quote response
Representative programs
The manufacturing decisions behind dependable parts.
Every program has a different geometry, material, and use case. We focus on the decisions that make production easier to repeat.
Snap-fit storage component
Reviewed draft, wall thickness, and snap geometry for repeatable assembly and clean release.
View program notes Multi-size serving tray
Applied a common tooling approach to support a family of sizes and colors with consistent results.
View program notes Impact-resistant tool housing
Balanced material selection, texture, ribs, and parting lines for dependable daily use.
View program notesReady to move your part forward?
Send your drawing, target volume, material, and timing. We will come back with a practical manufacturing path.