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 Simblong - Professional Plastic Injection Molding Manufacturer Since 2012
Our Advantages
Why leading brands choose us as their long-term manufacturing partner
True One-Stop Manufacturing
From mold design and fabrication to injection molding, surface finishing, and final assembly — we handle every step in-house. You don‘t need to coordinate with multiple suppliers or worry about quality gaps between different vendors. One purchase order covers everything. This integrated approach reduces your project management time, eliminates communication errors, and ensures consistent quality from start to finish. Whether you need 1,000 or 1,000,000 parts, we deliver with full responsibility and traceability.
In-House Engineering Team (Electronic + Mechanical)
Unlike traditional mold makers who only focus on tooling, we have both electronic and mechanical engineers on staff. We evaluate your product from a system perspective before cutting any steel. Our engineers provide professional DFM (Design for Manufacturability) analysis to identify potential issues in part design, material selection, and assembly. If your product requires electronic integration — such as PCBs, sensors, or wiring — our electronic engineers ensure proper fit and function. This early-stage intervention saves you from costly design changes later and accelerates your time-to-market.
Cleanroom + High-Speed Injection Molding Machines
We operate a dedicated cleanroom injection molding workshop that meets stringent cleanliness requirements for medical devices, optical components, and electronic parts. This ensures your products are free from dust contamination and comply with industry standards. In addition, our fleet of high-speed injection molding machines delivers exceptional efficiency for thin-wall and precision parts. High-speed molding reduces cycle times by up to 50% compared to conventional machines, allowing us to meet tight deadlines without compromising quality. Whether you need high-volume production or rapid prototyping, our equipment combination gives you both quality and speed.
Free Mold Maintenance During Production
Mold maintenance is critical to ensuring consistent part quality and avoiding unexpected production stoppages. We provide free mold maintenance throughout the entire production period — not just at the beginning. Our technicians regularly inspect, clean, and service your mold to keep it in optimal condition. This proactive approach prevents wear-related defects, extends mold lifespan (often beyond 2 million shots), and minimizes downtime. You don‘t pay extra for these services. We take full ownership of the tooling’s performance because a well-maintained mold means reliable production for your business.
Trusted by Global Leading Brands
Our quality management system has been audited and approved by multiple globally recognized brands across automotive, medical, and consumer electronics industries. These brands conduct rigorous supplier evaluations — including on-site factory audits, process capability studies, and long-term reliability tests. We have successfully passed these audits and continue to maintain long-term partnerships with them. When you work with us, you benefit from the same quality standards, documentation practices, and process controls that satisfy the world‘s most demanding customers. Our track record speaks for itself.
Free DFM (Design for Manufacturability) Analysis
Before we build any mold, we provide a complimentary DFM analysis report. Our engineers review your 3D drawing, identify potential molding issues (such as sink marks, weld lines, warpage, or difficult draft angles), and recommend design improvements. We also suggest alternative materials or gate locations to optimize cycle time and part quality. This report is delivered to you with clear visuals and actionable recommendations — at no cost. Many of our clients have saved 15-20% in tooling modifications and shortened their development timeline by several weeks simply by acting on our DFM feedback before cutting steel.
Find Your Integrated Manufacturing Solution
Tell us about your project requirements.We will provide a comprehensive manufacturing proposal covering mold design,molding,finishing,and assembly-all from a single trusted partner.
Ready to Bring Your Product to Scale?

Whether you need a single manufacturing process or a fully integrated program, our engineering and manufacturing teams are ready to support your next project.
From Product Engineering to Scalable Manufacturing.
Since 2012, Simblong injection molding manufacturer has supported established brands and emerging hardware innovators with integrated product engineering and flexible manufacturing—from precision injection-molded and surface-finished components to subassemblies and fully assembled products.



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Add: No. 4, Wanan Road, Zhenan Industry Park, Changan Town, Dongguan City, Guangdong Province China
Contact Us
Contact person: Spencer Chen
Tel: +86-134 2864 0022
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