BAIC vehicle on-board computer display screen mold
BAIC vehicle on-board computer display screen mold
Precision Engineered: Inside Ansix Tech's High-Stakes Mold for BAIC's Digital Dashboard
Introduction: The Convergence of Precision and Pressure in Automotive Displays
In the competitive arena of automotive manufacturing, the interior cabin has become the latest battleground for innovation. As vehicles evolve into sophisticated digital platforms, components like the on-board computer display screen are no longer mere accessories but central command hubs. These screens must withstand extreme temperatures, resist constant vibration, and deliver flawless optical clarity—all while being produced at volumes and costs that meet the brutal economics of the auto industry. For a Mold Maker like Ansix Tech, the project to create the injection mold for BAIC Motor Corporation's latest vehicle display was a monumental challenge that tested the limits of engineering, material science, and logistical precision.
This article chronicles Ansix Tech's journey from concept to rapid delivery, detailing how the company leveraged decades of industry experience to design, validate, and manufacture a complex mold. The undertaking required navigating intricate design requirements, selecting advanced materials, and optimizing every facet of the injection molding process to ensure reliability for BAIC while aggressively driving down unit costs through systemic efficiency.
Project Genesis: Deconstructing the BAIC Display Challenge
The core challenge was to produce a large, thin-walled plastic housing that would serve as the robust yet elegant frame for BAIC's digital instrument cluster. This housing needed to integrate seamlessly with other cockpit elements, providing a secure mount for the delicate LCD or OLED panel, the printed circuit board (PCB), and associated electronics. Key design imperatives included:
Structural Integrity & Thin-Wall Design: Achieving necessary stiffness and resistance to warpage in a part with minimal material usage to save weight and cost.
Dimensional Precision: Ensuring critical interfaces for the screen, PCB, and dashboard mounting points were held to micron-level tolerances for perfect assembly.
Aesthetic Superiority: Delivering a Class-A surface finish free of sink marks, flow lines, or weld lines that would be visible in the final vehicle.
Thermal & Environmental Stability: The material and design had to perform reliably across a wide temperature range typical of automotive interiors and resist long-term aging.
Phase 1: Foundational Design and Virtual Validation
The project commenced not on the factory floor, but in the virtual realm of Computer-Aided Engineering (CAE). Ansix Tech's engineering team utilized state-of-the-art mold flow analysis software to simulate the entire Injection Process before cutting any steel. This Digital Factory Manufacturing (DFM) analysis was critical for identifying and mitigating risks early.
Core Design Tenets:
Gate System Strategy: A multi-point hot runner system was selected. This approach ensures balanced filling of the large part, reduces material waste (no cold runner to trim), and provides independent control over injection into different sections of the mold, crucial for managing warpage.
Cooling System Architecture: Following the principle that efficient cooling accounts for over half of the cycle time, engineers designed a conformal cooling system. Using techniques like baffles and bubblers, the cooling channels were routed to follow the complex contours of the part geometry precisely. This ensures uniform heat extraction, critical for minimizing cycle time and preventing differential cooling that leads to part warpage or residual stress.
Ejection & Venting: A meticulous layout of ejector pins, sleeves, and blades was planned to apply even force on the delicate part without causing marks or distortion. Extensive venting channels were incorporated at weld line locations and end-of-fill areas to allow trapped air to escape, preventing burns and short shots.
Phase 2: Strategic Material Selection – A Dual-Front Battle
Success hinged on choosing the right materials for two distinct components: the plastic for the final part and the steel for the mold itself.
- Plastic Resin for the BAIC Housing:
After thorough evaluation, a high-performance Acrylonitrile Butadiene Styrene (ABS) compound was chosen. ABS offers an optimal balance of high impact strength, good thermal stability, and excellent surface finish, making it ideal for automotive interiors. Its composition, typically a two-phase system with a polybutadiene rubber phase dispersed in a SAN matrix, provides the necessary toughness. For this project, a specific grade with enhanced flow characteristics (crucial for filling thin walls) and low halogen content for environmental compliance was specified.
- Mold Steel Selection:
The mold material directly impacts cycle time, part quality, and tool longevity. For the BAIC display mold, Ansix Tech selected a premium pre-hardened stainless steel (like P20) for the majority of the cavity and core. P20 steel offers an excellent combination of good machinability, uniform hardness (typically HRC 30-36), and strong polishability for a high-gloss surface finish. For high-wear areas like the gates and thin ribs, inserts made of harder tool steels (like H13) were used.
Table: Key Material Selection Rationale
Phase 3: Precision Manufacturing and Process Mastery
With a validated design and materials secured, the focus shifted to the high-precision manufacturing of the mold.
Machining and Workflow: The process began with Computer Numerical Control (CNC) rough milling of the steel blocks to approximate shapes. This was followed by multiple stages of semi-finishing and finishing machining using high-speed CNC mills and Electrical Discharge Machining (EDM). EDM was indispensable for creating the intricate textures, deep ribs, and sharp corners impossible with traditional cutting tools. Each component was then hand-polished by skilled technicians to a mirror finish, a process requiring hundreds of hours of meticulous work.
The Prototype Crucible: The first mold trial is a pivotal moment. Initial shots revealed challenges typical of complex parts:
Weld Lines: Visible lines formed where molten plastic fronts met around holes or pins in the part. Ansix engineers addressed this by adjusting the hot runner valve timing and slightly modifying the venting in affected areas to allow the fronts to fuse more completely.
Sink Marks: Small depressions appeared over thicker ribs on the backside. The solution was a combination of packing pressure optimization and a slight modification of the rib design to ensure more uniform cooling.
These issues were resolved not through guesswork, but by revisiting the mold flow simulations, correlating the real-world data with the virtual model, and making precise, informed adjustments to the tool and process parameters.
Phase 4: Optimization for Volume Production and Quality Assurance
With a proven mold, the mission evolved into maximizing efficiency and ensuring unwavering quality for mass production.
Process Optimization for Cost Control: Every second saved in the cycle time translates to significant cost savings over a production run of hundreds of thousands of parts. Ansix Tech’s focus was on:
Cycle Time Reduction: The conformal cooling system design paid dividends here, enabling faster solidification and ejection. Engineers fine-tuned cooling line temperatures and flow rates for optimal thermal balance.
Scrap Rate Minimization: By implementing a closed-loop process control system, the injection molding machines automatically adjusted parameters like switch-over point and holding pressure in real-time to compensate for material viscosity changes, ensuring every shot met specification.
Material Efficiency: The use of a hot runner system eliminated sprue and runner scrap. Furthermore, Ansix worked with material suppliers to explore the use of regrind blends for non-cosmetic internal features of the housing, where applicable, without compromising performance.
Robust Quality Assurance: Quality was embedded at every stage. The pre-delivery mold inspection was exhaustive, covering all mechanical, hydraulic, and thermal systems. During production, a multi-tiered inspection regime was implemented:
In-line Automated Optical Inspection (AOI): Cameras checked every part for critical dimensions, surface defects, and the presence of all features.
Statistical Process Control (SPC): Key parameters from every shot were logged and monitored for trends that might indicate tool wear or process drift.
Regular Destructive Testing: Sample parts were subjected to rigorous mechanical and environmental tests to validate long-term performance against BAIC’s standards.
Conclusion: Delivering Reliability and Value in a Demanding Industry
The successful rapid delivery of the BAIC on-board computer display screen mold stands as a testament to Ansix Tech’s integrated engineering philosophy. By front-loading the development with sophisticated simulation, making strategic material choices, and relentlessly optimizing the manufacturing process, Ansix did more than just build a tool—they engineered a value-generation system for their customer.
The project underscores a critical truth in modern automotive supply chains: the lowest part cost is not achieved by bargaining over unit price alone, but by collaborating with a partner who can design out cost through material intelligence, process efficiency, and flawless execution. Ansix Tech’s deep experience in automotive injection molding enabled them to navigate the project's high-stakes challenges, delivering a mold that ensures reliability for BAIC’s vehicles and exceptional value through its optimized, high-yield production lifecycle. In the race to define the digital cockpit, it is such partnerships between visionary automakers and masterful mold makers that will drive the industry forward.
Ansix Tech Co Ltd
If you have any plans related to BAIC vehicle on-board computer display screen mold, you can contact us at any time. We will turn your ideas into reality, let you realize your dreams, and obtain large orders from the market. Our contact information is info@ansixtech.com. Or contact our CTO, mail: stephen@ansixtech.com
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