Custom Plastic Injection Molding: Your Turnkey Manufacturing Solution
Bringing a new product to market requires a manufacturing partner who can solve problems, not just press buttons. Established in 1978, Shun Tung Industrial believes in straightforward communication and building long-term trust. We manage the entire lifecycle from design, tooling, and trial runs to mass production and assembly right in-house.

Table of Contents
  • What is Custom Plastic Injection Molding?
  • Our End-to-End Production Workflow
  • Key Industries We Serve
  • Why Global Clients Trust Us
  • Frequently Asked Questions

What is Custom Plastic Injection Molding?
While standard plastic items are widely available, any product with unique dimensions, snap-fits, or internal mechanisms requires Custom Plastic Injection Molding. A reliable Plastic Injection Manufacturer doesn't just inject resin into a mold; they analyze your drawings beforehand to prevent warping, sink marks, and structural flaws.

Our End-to-End Production Workflow
To save you from the hassle of coordinating between separate tooling and molding vendors, we consolidate the entire process under one roof:
Production Stage What We Do Your Benefit
1.Design & Review Check draft angles, wall thickness, and structural ribs Ensures smooth release and structural stability
2.Tooling & Sampling Fabricate precision steel molds and test sample shots Guarantees exact dimensions matching your specs
3.Molding & Finishing Control injection parameters, assembly, and printing Delivers ready-to-ship finished goods efficiently

Key Industries We Serve
Over decades of operation, we have manufactured thousands of custom components across various industries, specializing in:
  • Electronic Products: Network device housings and precision internal structures.
  • Educational Toys: Safe, non-toxic toy bodies and smooth-running gear parts.
  • Medical Equipment: Compliant medical device enclosures that withstand sanitizing agents.

Why Global Clients Trust Us
We value straightforward business relationships. By keeping everything in-house, we eliminate the finger-pointing risks common among multi-vendor supply chains. We keep your schedules tight and your quality high.

Frequently Asked Questions
Q1: What is the typical lead time for new tool development?
Tooling and sampling usually take between 25 to 35 working days, depending on the complexity of your part.
Q2: Do you provide secondary processes like assembly and printing?
Yes! We offer in-house assembly, pad printing, spray painting, laser engraving, and ultrasonic welding.
Q3: What is your Minimum Order Quantity (MOQ)?
MOQ varies based on part size, tooling costs, and resin selection. Send us your 3D CAD files for a tailored evaluation.
Q4: What if I only have a conceptual sketch instead of a 3D CAD file?
No problem. Share your ideas and dimensions, and our engineering team can help convert your concept into production-ready 3D drawings.