Injection Molding Services for Custom Parts
Choose the right injection molding solution based on your material, production volume, part requirements, and application. Explore the specific service that fits your project or send your drawing for a manufacturing recommendation.
Choose the Right Injection Molding Process
Different parts require different molding approaches. Start with the material and function of your part to identify the most suitable process for your application, whether you need rigid plastic parts,
flexible rubber components, multi-material construction, or molded-in inserts.
Plastic Injection Molding
For rigid thermoplastic parts requiring repeatable dimensions, complex geometries, and scalable production.
Typical Applications
housing丨 enclosures丨brackets丨gears丨structural components.
→ Explore Plastic Injection MoldingRubber Injection Molding
For flexible molded parts that require sealing, elasticity, vibration isolation, or repeated deformation.
Typical Applications
seals丨gaskets丨grommets丨mounts丨protective components.
→ Explore Rubber Injection Molding
Overmolding
For combining two materials or adding a soft or elastomeric layer to a rigid substrate.
Insert Molding
For molding plastic or rubber around pre-placed components such as metal inserts, bushings, threaded components, or electrical contacts.
Typical Applications
threaded components丨electrical parts丨reinforced structural components.
→ Explore Insert Molding
Not Sure Which Molding Process is Right for Your Part?
Start with your part type and explore the suitable
manufacturing solution:
manufacturing solution:
Choose by Production Volume
Tooling choice drives cost, lead time, and mold life — pick the stage that matches where your project is right now.
Rapid Prototype
Dozens–few hundred parts · aluminum / soft tooling
Fast design validation before committing to production tooling.
Fast design validation before committing to production tooling.
Low-Volume Injection Molding
100–10,000 units · aluminum / MUD tooling
Bridges prototyping and mass production — market testing, small batches.
Bridges prototyping and mass production — market testing, small batches.
High-Volume Injection Molding
10,000+ units · P20 / hardened steel tooling
Reliable, scalable production with consistent quality.
Reliable, scalable production with consistent quality.
Need CNC Machining, Compression Molding, or Assembly Alongside
Your Injection Molded Parts?
Does Your Project Have Special Requirements?
For parts or production needs outside standard injection molding scope.
Large Part Injection Molding
For oversized housings, covers, structural components, automotive parts, and other large molded components that require greater machine and mold capacity.
Choose this option when part size or mold dimensions exceed standard molding requirements.
Choose this option when part size or mold dimensions exceed standard molding requirements.
Automation Injection Molding
For production environments where automated handling and repeatable processes can improve efficiency, consistency, and cycle times.
Choose this option when automation is important for production volume, repeatability, or labor efficiency.
Choose this option when automation is important for production volume, repeatability, or labor efficiency.
Choose by Material
Explore the material options available for custom injection molded parts.
Plastic
ABS | PC | PP | POM | PE | PS | PVC | PA | PMMA | PC/ABS | HDPE | LDPE | PU
Choose by Industry & Application
Browse injection molding services by industry and application.
Choose China for Injection Molding Service?
China's mold-making and injection molding supply chain is mature and well established. This gives you access to a wide range of tooling options, materials, and supporting processes — plus manufacturers experienced in shipping to overseas markets. Jiangzhi is a direct factory in China, established in 1978. We handle tooling and production together, from prototype to mass production.
Explore More Injection Molding Resources
Explore our extensive collection of injection molding articles, covering design, materials,processes, defects, troubleshooting, and more.
Find practical guides, material comparisons, design tips, process insights, and troubleshootingadvice across a wide range of injection molding topics.
Find practical guides, material comparisons, design tips, process insights, and troubleshootingadvice across a wide range of injection molding topics.
FAQs About Injection Molding Service
Don't get your answer? Let’s jiangzhi answer for you!
Can I combine rubber and plastic in one part?
Yes — that's what overmolding is for. A rigid plastic substrate is molded first, then a rubber or TPE layer is molded onto it in a second step.
Is overmolding or insert molding cheaper?
It depends on the part, but insert molding typically has a lower piece cost since it uses one material and eliminates a secondary assembly step. Overmolding usually costs more due to the two-material, two-shot process — but it replaces a bonding or assembly step you'd otherwise need to do separately.
Do I need insert molding if I just want a soft grip on a handle?
No — that's overmolding. Insert molding is for adding non-moldable components like metal threads or contacts, not for adding a soft-touch surface.
Can plastic injection molding replace rubber for a sealing application?
Not reliably for repeated compression sealing. Some flexible plastics (like TPU) can approximate rubber's flexibility, but for a true compression seal that needs to hold up over thousands of cycles, rubber is the safer choice.
What if I don't know which process my part needs?
Upload your drawing and we'll recommend a process based on your part's material requirements, tolerances, and application — no obligation to quote.
