Our Manufacturing Services
HLH offers comprehensive manufacturing capabilities to meet a wide range of needs, from rapid prototyping to small-batch and high-volume production. With our own factories and a reliable network in China, we are able to deliver complex, high-quality components efficiently.
3D Printing
Need to quickly manufacture complex-shaped parts but don’t want to use a lot of molds? Our 3D printing service can meet your needs. We build parts layer by layer from your CAD model—fast, simple to set up, and ideal for complex geometries that are difficult to manufacture using other methods.
Process: SLM/SLS/SLA/MJF/FDM/DMLS
Production-ready quality with tight dimensional accuracy
50+ Industrial materials (resin, nylon, elastomer, metal etc.)
Fast turnaround from 1 day
CNC Machining
Need high-precision custom parts? Our CNC machining service can meet your needs. We use computer-controlled cutting tools to machine materials—whether you’re making small-batch prototypes or large-scale production—ensuring that every part is consistent, precise, and ready to use.
Materials: Wide range of metals & engineering plastics
Surface Roughness: Up to 16uin (0.4μm)
Part Size (mm): 4000×1500×600 (Max) & 2×2×2 (Min)
Lead Time: 1 to 5 days
Sheet Metal Fabrication
Need to manufacture robust and durable metal parts from flat sheet metal? Our sheet metal fabrication service can meet your needs. We use aluminum, steel, and other flat sheet metal, cutting, bending, stamping, and assembling them to create finished parts—robust, structurally stable, and durable.
Process: SLM/SLS/SLA/MJF/FDM/DMLS
Production-ready quality with tight dimensional accuracy
50+ Industrial materials (resin, nylon, elastomer, metal etc.)
Fast turnaround from 1 day
Injection Molding
Need custom plastic parts? Our injection molding process can meet your needs. We heat the resin, inject it under high pressure into a precision mold, and then cool it to solidify, ultimately producing precise, consistent, and ready-to-use parts. Whether you need small batches or hundreds of thousands of pieces, we can reliably perform high-precision machining.
Expert DFM feedback and dedicated engineering support throughout production
Tight tolerances and repeatable quality for end-use applications
Capabilities include insert molding, overmolding, compression molding, and more
Vacuum Casting
Need fine, high-quality parts for small-batch production or prototyping? Our vacuum casting process can meet your needs. We use vacuum pressure to draw resin into silicone molds, creating parts with complex shapes and clear details—ideal for small-batch production without the need for bulky molds.
Injection-mold-like appearance and surface quality
Low tooling cost with fast production turnaround
Flexible material options for functional and cosmetic parts
Lead time within 5–7 days
Die Casting
Need a large quantity of precision, fine metal parts? Die casting is a manufacturing process that uses high pressure to inject molten metal into a steel mold, creating fine, precise metal components. It is particularly suitable for mass production of parts with consistent quality.
Self-operated casting facilities for better process control
Ideal for prototype validation and bridge manufacturing
Cost-effective alternative to low-volume CNC machining
Lead time as fast as 10 days
Why Choose Our Manufacturing?
Excellent. Efficient. Economic.
HLH is a full-service manufacturing company providing manufacturing and surface treatment services to customers worldwide, covering virtually all industries including aerospace, medical, and automotive. We are committed to keeping pace with industry developments and manufacturing trends, striving to provide world-class products.
Flexibly Adapt to Changing Demand
Market demand changes: Customers increase orders, designs need last-minute adjustments, or projects shrink. On-demand manufacturing processes adapt to your needs—adjusting quantities, specifications, or schedules—without requiring the reprocessing of large prefabricated batches.
Test, Learn, and Reduce Risk
Unsure if a new part design will click? With on-demand services, you can start small—order a batch of tests to validate needs, gather feedback, and refine details—without betting big on unproven ideas. It’s a low-risk experiment that lets you finalize your product.
Massive Production Capacity
From single prototypes to 100,000+ parts, our large-scale infrastructure ensures stable output and fast turnaround at any production stage.
How It Works: Our On-Demand Manufacturing Process
Share Your Needs
Tell us what you need: part designs (3D, 2D, or even a sketch), materials, quantity, and when you need it. Our team checks it over within 24 hours.
We Craft a Custom Plan
We’ll suggest the best process (like injection molding or CNC), share a clear quote, and lock in timelines. Need changes? We’ll tweak until you are satisfied.
Produce What You Ordered
We build exactly what you ordered—no extra parts. We use precise tools to hit every spec, and you can track progress in real time, so you always know what’s happening.
Rigorous Quality Checks
Every part gets strict testing (like dimension checks or strength tests) to meet your standards. We don’t ship until it’s perfect.
Deliver On Time
Your order shows up when we say it will—small batches in days, larger runs on schedule. No delays, no last-minute issues.
Industry Applications Served
Our CNC machined products, molds and various products are widely used in various industries due to their excellent quality and reliable functions, and they have also become an indispensable part of many enterprises.
Aerospace
Access top-tier manufacturing services for your custom aerospace prototypes and production components.
Medical Devices
On-demand manufacturing for new product development in the medical industry.
Robotics & Automation
We have simplified the manufacturing of robots and provided competitive prices.
Industrial Equipment
Speed up the production of industrial equipment parts and accessories.
Consumer Products
Fast-track prototyping and new product launches of high-quality consumer products for a variety of applications.
What it’s like to work with HLH – in our customers’ words
"It is a pleasure to work with a company whose personnel are willing and able to think out of their box. With your commitment to staying on the cutting edge of technology, you supply tooling to us that is right on time and works first shot."
"Not many other manufacturing facilities would prioritize a job with a volume this low. They treated us as if we were a long-time customer bringing in high-volume business."
“HLH has been a strong partner on our EV programs. They helped us optimize a few key mponents for weight and manufacturability, and they consistently hit the tolerances we need. Their fast turnaround times have kept our development cycles moving, which is critical in EV work.”
Factory Display
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Our Certifications
Recent Articles/Blog
3D Printing vs, CNC vs. Vacuum Casting
This article compares and contrasts three common manufacturing methods: 3D printing, CNC machining, and vacuum casting.
How Much Does 3D Printing Cost?
Learn about 3D printing costs, including in-house vs. outsourcing options, with a free cost calculator and saving tips.
CNC Machining Price Guide: Breakdown & Price Comparison
Break down CNC machining prices, learn cost-saving strategies, and compare several major CNC service providers.
