Automotive injection mould manufacturing 3 core technology analysis

Automotive injection mould is the core equipment for automotive parts manufacturing, and its quality directly determines the accuracy and performance of internal and external decorative parts and functional parts. With the growth of lightweight and intelligent demand for new energy vehicles, the efficiency and precision of the mould manufacturing process has become the focus of competition in the industry. In this paper, we will start from the mould design and simulation, precision processing technology, rapid prototyping and trial mould three core processes, analysis of automotive injection mould manufacturing key technologies, and explore how to enhance production efficiency through intelligent and digital.

I. Mould design and simulation: accurate prediction and efficiency improvement

Mould design is the ‘brain’ of automotive injection mould manufacturing, which directly affects moulding quality and production efficiency.

1. 3D Modelling and Structural Optimisation

Core point:

Based on CAD software (e.g. UG, CATIA), 3D modelling is carried out to ensure reasonable design of parting surfaces and reduce moulding defects.

Adopt Moldflow analysis to predict plastic flow, shrinkage and cooling effect, and optimise the layout of pouring system and cooling channels.

Technical Advantages:

Reduce the number of mould trials and shorten the development cycle by more than 30%.

Applicable to the design verification of complex curved moulds (e.g. automotive instrument panel, door panel moulds).

2. Material and process co-design

Material selection strategy:

High wear-resistant tool steel (e.g. H13) for high-precision cavities; Aluminium alloy for rapid prototyping moulds, reducing cost by 40%.

Pre-hardened steel (e.g. P20) for both processing efficiency and mould life.

II. precision machining technology: five-axis CNC and intelligent upgrade

Precision machining is the core link of mould manufacturing, which directly determines the cavity accuracy and surface quality.

1. 5-axis CNC machining

Technology highlights:

Through the five-axis linkage (X/Y/Z/A/B axis) to achieve high-precision machining of complex surfaces, tolerance control ± 0.005mm.

Suitable for clearing and polishing of deep cavity structures such as automotive lampshades and grilles.

Process optimisation:

Dynamic planning of tool path, reduce empty tool stroke, improve machining efficiency by 20%.

Adoption of diamond-coated tools to extend tool life and reduce cutting heat.

2. Composite machining technologies

Electric Discharge Machining (EDM) and Wire Cutting are synergistic:

EDM processes deep grooves and fine textures (e.g. leather grain); WEDM handles high hardness materials.

High Speed Milling (HSM):

Carbide cutting tools with high speed (over 20,000 rpm) to achieve mirror finish.

III. Rapid Prototyping and Mould Testing: The Key to Shorten Delivery Cycles

Rapid prototyping is the core competitiveness of automotive mould manufacturing to respond to market demand.

1. Rapid prototyping technology for moulds

Core method:

3D printing mould core: using metal 3D printing technology to make complex mould core, shortening the proofing cycle to 7 days.

Soft mould technology: use aluminium alloy or resin-based moulds for small-lot trial production, reducing cost by 50%.

Applicable Scenarios:

Rapid verification of new energy vehicle interior parts (e.g. centre console, door trim panel).

2. Intelligent mould trial and parameter optimization

Technology breakthrough:

Real-time monitoring of injection pressure, temperature and cooling rate through IoT sensors to dynamically adjust process parameters.

Combined with AI algorithm to predict moulding defects (e.g. warpage, fusion line) and optimize the pass rate.

IV. JLCCNC: One-stop solution for automotive injection mould manufacturing

In the field of automotive mould manufacturing, JLCCNC has become the preferred partner of global customers by virtue of its 5-axis CNC precision machining and rapid prototyping services:

Technical Advantage:

High precision machining: ±0.005mm tolerance control to meet the stringent standards of automotive interior and exterior parts.

Rapid response: the fastest 3 days to complete the mould prototyping, support for aluminium mould/steel mould customized production.

Full-process service: Provide digital process support from design simulation to trial mould mass production.