Automotive Blow Molding Parts Manufacturer for Custom OEM Components
Model: BL2505160 | Die Ref: F5120S
High-precision automotive blow molding solutions for air ducts, fluid systems, fuel tanks, and structural hollow parts. We provide fast DFM response, in-house mold manufacturing, and stable production support for scaled production.
- Quote Within 1 Working Day
- ISO 9001:2015 Certified
- Trusted by Tier 1 suppliers
- In-house Mold Design & Engineering Team
- Taizhou City (Mold Town)
- 6100 m² Workshop
- 10+ Years Manufacturing
- 12-Month Warranty
- 24h Response
Integrated Development and Batch Production Support for Automotive Blow Molded Components
We provide blow molding tooling and production support for automotive hollow plastic components, including air ducts, fluid systems, fuel tanks, and functional structural parts.Different components require different levels of control in wall thickness, airflow performance, sealing stability, and dimensional accuracy. All tooling and processes are developed accordingly.
We operate an in-house tooling and machining workshop, allowing mold development and production process tuning to be completed in parallel.After receiving drawings or engineering data, we deliver a complete solution covering mold design, trial validation, and production-ready parts that can be directly used for vehicle assembly and testing.We mainly support automotive suppliers with stable mass production programs. At the same time, we can also handle prototype trials and small-batch sample production when engineering data is available.
Customer Testimonial
The BL2505160 mold delivered exceptional cycle time reduction — 43 seconds vs. our previous 68-second benchmark. T1 samples passed on first try with all 12 dimensional checkpoints within tolerance.
Technical Drawings & 3D Models
UNIQUE PER CASE — Drawing package provided per project. Contact sales for your DFM & CAD package.
Automotive Blow Molding Tooling Design, Development & Manufacturing
Automotive Parts We Work On
| Parameter | Process | Material | Key Production Control Points |
|---|---|---|---|
| Air Ducts | Blow Mold | PP | Multi-radius 3D extrusion; wall thickness CV <10%; internal surface finish Ra ≤ 1. 6μm |
| Sedan Rear Wing | Blow Mold | ABS、PP+GF | Hollow structure wall thickness 2–4 mm; Class-A surface (post-mold painting required); mounting point positional tolerance ±0.3 mm; parting line must not fall on visible surfaces; weight 2–6 kg, width 1000–1600 mm |
| Automotive Fuel Tank | Blow Mold | HDPE+EVOH | Barrier layer thickness ±0.05 mm; CARB / Euro 6 evaporative emissions compliant; capacity 0.5–12 L; EBM multi-layer co-extrusion process |
| Automotive Spoilers | Blow Mold | ABS PP+GF | Hollow structure wall thickness 2–4 mm; Class-A surface (post-mold painting required); mounting point positional tolerance ±0.3 mm; parting line must not fall on visible surfaces |
| Automotive Side Steps | Blow Mold | PP、ABS | Aerodynamic profile accuracy ±0.5 mm; leading-edge thin-wall collapse prevention requires closed-loop cooling system; UV aging 1000 h, no discoloration |
Materials & Processes
| Materials | Processing temperature | Shrinkage | Application |
|---|---|---|---|
| HDPE | 180–230°C | 1.5–2.6% | reservoirs, ducts, washer tanks |
| PP | 200–240°C | 1.2–1.8% | intake pipes, HVAC ducts |
| PP + GF | 210–250°C | PP: 1.2–1.8%,GF filled: 0.4–0.8% | structural brackets, engine covers, intake manifolds |
| ABS | 200–240°C | 200–240°C | interior components, HVAC ducts, large exterior parts |
| Parameter | Value / Description |
|---|---|
| Sample #1 | Row 1, Content 1 |
| Sample #2 | Row 2, Content 1 |
| Sample #3 | Row 3, Content 1 |
Core Blow Molding Process Parameters
UNIQUE PER CASE — Drawing package provided per project. Contact sales for your DFM & CAD package.
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| Sample #1 | Sample #1 |
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| Sample #1 | Sample #1 |
| Sample #2 | Sample #2 |
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Cooperation Model & Process
UNIQUE PER CASE — Drawing package provided per project. Contact sales for your DFM & CAD package.
Prerequisites: What You Should Provide
- 3D CAD model of the part (STEP or IGES)
- Material (e.g., HDPE）
- Critical dimensions & tolerance requirements
- Estimated annual volume (for mold cost amortization)
- PPAP level required (typically Level 3)
- Packaging & logistics requirements
Development Timeline
UNIQUE PER CASE — Drawing package provided per project. Contact sales for your DFM & CAD package.
| Phase | Activities | Time | Deliverables |
|---|---|---|---|
| DFM & Quotation | Manufacturability review, process planning, cost breakdown | 3–5 working days | DFM Report + Quotation |
| Tooling & Trials | Mold design → machining → T0/T1 trials → corrections → T2 approval | 6–8 weeks | First Article Inspection (FAI) Report |
| Mass Production Approval | Cpk validation (≥1.33), PSW submission | 2–3 weeks, overlaps with trials | Production Part Approval Submission Approval |
| Production Ramp-Up | Initial validation batch (~5000 pcs) with SPC monitoring | 1–2 weeks | Process Capability Analysis Report |
| Stable Production | safety stock & Ship per Purchase Order | Continuous | Batch Inspection Report accompanies shipment |
Quality System
From drawing to series production, there’s a set of actions you need to provide and we need to execute.
Drawing (STEP / IGES) + material grade + annual volume estimate + critical tolerance table
DFM report returned in 3–5 working days, flagging design risks, shrinkage compensation, mold plan, and per-part pricing
Scheduled after PO sign-off; key milestones confirmed with photos; T1 first-sample shipment
Process capability verification + dimensional inspection report + Part Submission Warrant sign-off. Supplier production authorization is released after approval.
Safety-stock shipments; inspection report per batch; written approval required for any changes
Annual process audit; SPC data sharing; early warning on backup mold requirements
Automotive Blow Molded Parts We Manufacture
These are automotive blow molded parts we manufacture, including air ducts, side steps, and spoilers.
Technical Drawings & 3D Models
UNIQUE PER CASE — Drawing package provided per project. Contact sales for your DFM & CAD package.
DFM report
- Wall Thickness Analysis：To check whether the wall thickness distribution of the product is uniform.
- Demolding：Whether the demolding process goes smoothly.
Material Selection: Able to select appropriate materials based on the product’s functional and appearance requirements.
Assembly: To check whether there are any assembly issues when the product is assembled with other components.
Mold flow analysis
Optimize gate location :Determines the best position for injecting plastic into the mold to ensure complete filling.
Predict filling patterns :Visualizes the advancement of the melt front, identifying potential air traps and weld lines.
Cooling behavior : Evaluates temperature distribution and cooling time to reduce warpage and shorten cycle time.
Identify shrinkage and warpage : Predicts areas prone to sink marks or deformation after cooling and solidification.
Evaluate packing pressure : Assesses the holding pressure maintained during cooling to compensate for material shrinkage, sink marks, dimensional inaccuracies, or internal voids.
Reduce mold trial iterations : Minimizes the number of physical mold trials, saving both time and cost.
Mold design
Mold trial
Defect Diagnosis and Troubleshooting: Identifying various defect issues that occur during the trial molding stage and eliminating them.
Comprehensive Inspection: Performing dimensional accuracy measurements, appearance checks, material property tests, and assembly trials on the samples.
Performance Testing: Evaluating the flow rate and pressure of the mold’s cooling system, the filling balance of the mold, and other relevant conditions.
Recording: Documenting all key molding parameters for the first batch of samples produced.
Small-batch production and sample delivery
Quality Inspection: We will randomly sample products from each batch of small-scale production to conduct comprehensive dimensional accuracy measurements, appearance inspections, and material property tests.
Defect Handling and Improvement: If any defects occur during the production process (such as bubbles, warpage, dimensional deviation, etc.), we will immediately conduct a root cause analysis for the customer and adjust the mold manufacturing process and other means until the defects are eliminated.
Sample Delivery: According to the customer’s requirements, we will clean, deburr, and apply rust-proof treatment to some samples, and use shock-proof and anti-static packaging to ensure no damage during transportation.
After-sales service
- Technical Training Services：Our technicians have professional skills and relevant knowledge to support online mold maintenance guidance, conduct rapid troubleshooting, and assist in mold processing and processing of difficult-to-process engineering plastic raw materials.
- Regularly inspect and evaluate the mold ：our after-sales personnel can understand the customer’s usage in a timely manner and make corresponding suggestions.
- Repair & Warranty：We guarantee the quality of molds and provide first-level maintenance and second-level maintenance services. If you encounter any problems within the warranty scope, we will provide accurate and correct repair services to ensure that customers have the shortest downtime and quickly re-enter the production process.
Need a Custom Automotive Blow Molding Parts?
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Production Quality System & Process Control
ISO 9001:2015
Covers the full quality management system from design & development, procurement, manufacturing, and delivery through to after-sales service. Certificate current and in good standing.
Dimensional & Functional Verification
During production: first-piece sampling every 2 hours;track critical dimensions including wall thickness, inner diameter and hole position.
In-Line SPC Process Control
HDPE coolant circulation pipe molds — Φ20–Φ50 mm range, high-temp resistant design up to 120°C.
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