Custom Stretch Blow Molding Services in Shenzhen, China
Plasticpartsmfg provides specialized stretch blow molding (SBM) services for the production of high-clarity, durable plastic containers and technical components. Based in Shenzhen, we support product engineers and procurement teams through the full development cycle, from initial mold design and prototype sampling to high-volume, automated production.
We handle complex geometries for industries ranging from consumer packaging to industrial chemical storage, ensuring your parts meet strict dimensional and performance specifications.
Technical Parameters
Stretch Blow Molding Capabilities
Our facility utilizes multi-stage stretch blow molding processes to optimize material distribution, wall thickness, and structural integrity. We manage the entire process in-house, including preform design and custom tooling fabrication.
| Capability | Typical Range & Standards |
|---|---|
| Process Type | Single-stage & Two-stage Stretch Blow Molding (SBM) |
| Processable Materials | PET, PETG, PEN, and other stretchable resin formulations |
| Clamping Force / Machine Tonnage | 50 – 300 tons |
| Wall Thickness Distribution | 0.5 mm – 3.0 mm (application and geometry dependent) |
| Dimensional Tolerance | ±0.10 mm to ±0.30 mm |
| Production Volume Capacity | Pilot runs, low-volume bridge batches to millions of mass-production units |
| Secondary Value-Add Services | Helium/vacuum leak testing, custom labeling, ultrasonic assembly, silk-screen printing |
Engineering Focus
Precision Tooling and Material Expertise
Quality in stretch blow molding begins with the mold and the preform. We engineer custom molds using high-grade tool steels and aluminum alloys, specifically designed to manage the biaxial orientation of the polymer. This process significantly improves the mechanical properties of the final part, including impact resistance, clarity, and barrier performance.
Our engineering team assists with material selection to ensure compliance with specific requirements such as chemical resistance, UV stability, or food-grade certification.
Simultaneous stretching improves burst strength and gas barrier properties without adding extra wall weight.
Precision-milled cavities with optimal venting to maintain crystal clarity and uniform material flow.
Process Advantages
When to Choose Stretch Blow Molding
Stretch blow molding is the industry standard for creating hollow plastic parts with high strength-to-weight ratios. We recommend this process for projects requiring:
High Clarity
Achieving glass-like transparency for cosmetic, medical, or premium food packaging applications.
Lightweighting
Reducing raw material usage while maintaining high structural rigidity for bottles and specialized containers.
Barrier Properties
Improving oxygen and moisture resistance for volatile or sensitive chemical and beverage contents.
Complex Geometry
Creating uniform wall thickness in containers with ergonomic handles, fluted grips, or irregular profiles.
End-to-End Workflow
From Design to Full-Scale Production
Plasticpartsmfg functions as an extension of your engineering team. We assist in the seamless transition from initial CAD concepts to production-ready parts:
DFM Review
We analyze your 3D CAD files for draft angles, wall thickness, and stretch ratios to verify absolute manufacturability before cutting metal.
Tooling Development
Custom blow cavities and preform molds are fabricated in our Shenzhen facility to meet your precise product geometry and surface requirements.
Sampling & FAI
We provide first-article inspection (FAI) samples alongside full dimensional verification reports for your functional and aesthetic validation.
Full Production
Our automated multi-cavity lines maintain continuous, stable output, supported by in-line leak detectors and automated inspection checks.
Market Sectors
Industries Served
We provide custom plastic components for a variety of sectors that demand precision, barrier performance, and consistency across long production runs.
Whether your application demands USP Class VI biocompatibility, FDA food-contact compliances, or specific UN ratings for hazardous liquids, our materials lab ensures exact formulation adherence.
Packaging for personal care, cosmetic bottles, household cleaning liquids, and premium beauty dispensers with flawless surface finish.
Specialized containers requiring strict oxygen and moisture barrier properties to extend shelf life for sauces, concentrates, and beverages.
High-clarity vials, diagnostic reagent bottles, and sample storage components manufactured with pristine dimensional reliability.
Chemical-resistant bottles, heavy-duty technical housings, and fluid reservoirs designed to withstand aggressive agents and pressure.
Standards & Metrology
Quality Assurance and Inspection
Every production run undergoes strict inspection protocols. We utilize CMM (Coordinate Measuring Machines) and manual gauging to verify critical dimensions, including thread integrity, neck finish, and wall thickness distribution. Full inspection reports are provided upon request to ensure your components meet all design specifications before shipping.
Automated multi-point dimensional scanning against native 3D CAD files for critical features and parting lines.
Go/No-Go plug gauging and optical thread comparator checks to ensure 100% leak-proof closure sealing.
Ultrasonic thickness measurement across base, shoulder, and side wall to ensure balanced blow ratios.
Request a Quotation for Your Project
To receive an accurate quote, please provide your CAD files (STEP, IGS, or Parasolid formats) along with your technical drawings. Include details regarding the intended application, material requirements, and estimated annual usage.
Our engineering team will review your documentation and provide a DFM (Design for Manufacturing) assessment and a competitive quotation for your stretch blow molding project.
Submit Technical Specifications
Fill in the inquiry form below to receive a response within 24 business hours.