Car Parts Mold, Automotive Injection Mold, Precision Auto Mold Manufacturing

Q: 1.How do you ensure quality control in plastic injection molding?

We are a ISO 9001 certificated company. We ensure quality control in plastic injection molding through a multi-faceted approach which includes material testing, precise machine calibration, meticulous mold design and maintenance, and stringent inspection processes.

Q: 2. How do the DFM report work?

A Design for Manufacturability (DFM) report is a crucial document that evaluates the manufacturability of a product's design, aiming to identify and address potential manufacturing issues before they arise. Reports help identify and address potential issues early in the design phase, preventing costly changes later. Cost Efficiency: By optimizing designs for manufacturability and testability, reports help reduce production costs and increase yield. Quality Assurance: Thorough testing ensures that the final product meets quality standards and performs reliably.

Q: 3. What is the typical lead time for injection molding?

Mold fabrication usually takes 4–8 weeks, while production lead time depends on part complexity and quantity.

Q: 4. What is the difference between a prototype mold and a production mold?

Prototype molds are faster and cheaper, often using aluminum; production molds use hardened steel for high-volume runs.

Q: 5. Can you do small batch injection molding?

Yes. With standardized tooling and soft molds, small batches (hundreds to thousands) are feasible.

Plastic Car Parts Molding Solutions

Our factory specializes in the manufacturing of plastic injection molds for the automotive industry, offering a comprehensive range of car parts that include interior, exterior, and precision functional components. Through years of cooperation with leading automotive brands, we operate in full compliance with the IATF 16949 quality management system. From the beginning of design to the final production, we work closely with our customers to ensure all product requirements are met.

Our Capabilities

Item	Specification
Maximum Part Size	1450 × 1350 × 1450 mm
Maximum Clamping Force	1,500 tons
Maximum Part Weight	9,806 g
Mold Life	1,000,000 shots
Critical Tolerance	±0.05 mm
Mold Lead Time	35–45 days

Supported Materials

Material Grade	Typical Applications	Heat Resistance	Impact Resistance	Appearance Grade	Key Characteristics
PP+EPDM-Talc	Bumpers, instrument panels, door inner panels	HDT ~100–120°C	Excellent, good low-temp impact	Moderate, requires painting	Best stiffness-toughness balance, low density, most cost-effective
PA6-GF30	Intake manifolds, engine covers	HDT ~203°C	Good, but notch-sensitive	Fair, glass fiber floating lines	High strength, withstands engine bay heat, moderate cost
PA66-GF30	Intake manifolds (turbo), water housings, oil pans	HDT ~250°C	Good, better than PA6-GF30	Fair, glass fiber floating lines	Higher heat resistance; hydrolysis-resistant grades for cooling systems
PC/ABS	Instrument panels, center consoles, mirror housings	Vicat softening ~120–127°C	High impact, good low-temp toughness	Excellent, paintable-free options	Good flow for thin-wall complex parts, can be electroplated
ABS+PC	Taillight housings, glove boxes, door trim	Vicat softening ~100–112°C	Good	Excellent	ABS-dominant, lower cost than PC/ABS, better flow
TPE	Weather seals, grip overmolds, knobs	~-40°C to 100°C	Good elasticity, excellent sealing	Moderate	No vulcanization needed, recyclable, but limited scratch and aging resistance
TPU	High-wear overmolds, seals	~-40°C to 120°C	Outstanding, best wear resistance	Good	Best abrasion resistance and strength, but watch for hydrolysis and yellowing

Our Workflow with PPAP Integration

PPAP (Production Part Approval Process) is a core quality gate in the automotive supply chain. For an injection mold supplier, PPAP is not an extra step after delivery — it runs through the entire process from design to mass production. Below is our workflow for the automotive industry.

Stage 1: R&D Support

PPAP Corresponding Element: Design Record Confirmation

While supporting customer R&D or creating and improving design files (UG, SolidWorks, ProE, AutoCAD, etc.), we simultaneously confirm the completeness and version consistency of the Design Record. This is the first of the 18 PPAP elements, requiring the supplier to hold the correct version-level drawings, assembly drawings, and material specifications.

Stage 2: Mold Process — The Core PPAP Stage

PPAP Level 3 is the default submission level for automotive injection-molded parts. Level 3 requires submission of the PSW plus complete supporting data. The following PPAP core documents must be produced at this stage:

DFM Report → Design Confirmation

DFMEA (Design Failure Mode and Effects Analysis) is initiated during the mold design stage (if the supplier holds design responsibility). The DFMEA must identify potential failure modes, effects, causes, and current controls, and calculate the Risk Priority Number (RPN).

Mold Manufacturing → Sample Production

PPAP samples must come from a "significant production run" using production tooling, equipment, and operators. Samples must be individually labeled as "PPAP" and not mixed with regular parts.

PPAP Documents Required at This Stage

PPAP Document	Requirement
Process Flow Diagram (PFD)	Clearly describes each step and sequence from material receiving to final inspection.
Process FMEA (PFMEA)	Identifies how process steps can fail, the effects, and causes; evaluates RPN; defines recommended actions.
Control Plan	Defines control methods, sample size/frequency, test equipment, and reaction plan (response when a characteristic or parameter goes out of control).
MSA (Measurement System Analysis)	Gage R&R studies for all critical characteristics to ensure measurement system variation is acceptable.
Dimensional Results	Full dimensional inspection records for each mold/cavity; PPAP samples must be traceable to the dimensional report.
Material/Performance Test Results	Material certificates and performance test reports (including lab name, date, and standard).

Key Acceptance Criteria: Initial process capability studies require Cpk ≥ 1.67 for critical dimensions. If Cpk falls between 1.33 and 1.67, customer review is required; below 1.33 requires 100% inspection or corrective action.

Stage 3: Sample Modification

After sample modification, PPAP must be resubmitted. Any mold design change (cavity, core, gate, cooling layout) triggers PPAP resubmission. Modified samples require re-inspection, and the PFMEA and Control Plan must be updated accordingly.

Stage 4: Sample Delivery

PSW (Part Submission Warrant) is signed and submitted at this stage. The PSW is the summary document of PPAP. By signing the PSW, the supplier declares:

All PPAP requirements have been met.
Parts conform to drawing and specification requirements.
Production was completed on the declared tooling, number of cavities, and production cell.

Stage 5: Final Delivery

PPAP approval is a prerequisite for mass production delivery. Formal shipments can only begin after the customer signs the PSW. Meanwhile, the Master Sample must be retained at the supplier as a reference standard for future visual and dimensional comparisons.

		
			Why Choose Yixing Technology?
		
				Track Record according to IATF 16949. We have successfully finished a wide range of molds — including bumpers, door panels, fenders, and various pipeline connectors — each one can be tracked by our quality department.
			
				Mold flow before start. We use mold flow software to analyze and optimize filling, predict deformation, and control weld lines.
			
				Precision Machining and inspection equipment. Our facility is equipped with state-of-the-art 5-axis high-speed milling machines and precision EDM equipment. Inspected with CMM and 3D scanning technologies, we fully control the manufacturing process, guaranteeing strict dimensional accuracy.
			
				High-quality mold steel. By vacuum quenching and cryogenic treatment, we achieve high strength and high toughness, enhanced wear resistance steel. After high-grade mirror-polishing, the mold components can ensure long-term dimensional stability.
			
				Systematic Mold test and Validation. Comprehensive testing — including dimensional inspection, performance evaluation, and environmental simulations — we can meet our customers’ PPAP requirements.

With systematic engineering, strict quality control, and 20+ years’ mold experience, we provide automotive customers with high-reliability, long-life injection mold solutions.