This product is a set of dual-cavity precision injection molds, specially developed for speaker grills or air vent covers in European automotive interior projects. As a key automotive interior mold, its core challenge is to achieve a Class A appearance surface (high gloss or precise texture), uniform filling and extremely low warpage under extremely thin wall thickness (1.8–2.2 mm), as well as the absolute consistency of left and right parts in long-term production to meet the stringent visual and assembly standards of high-end automotive brands.
As a professional European mold exporter, JinYi Mold integrates its mature experience in serving European OEMs and Tier-1 suppliers throughout the entire mold development process. What we deliver is not only a mold, but also a turnkey solution including a complete process verification data package, ensuring that stable mass production can be quickly achieved after the mold arrives at the customer's factory.
Mold engineering
Dual-cavity symmetrical design:
Using a 1 out of 2 dual-cavity layout, the left and right symmetrical parts are formed at one time to ensure the consistency of their texture, gloss and shrinkage rate. The mold is made of S136 or 1.2083 mirror stainless steel. Through precision EDM processing and multi-level manual polishing, it can achieve a true mirror effect with a surface roughness Ra ≤ 0.02 μm, or accurately reproduce the VDI 3400 standard texture.
Runner and filling optimization:
Equipped with a dual-point needle valve hot runner system, combined with Moldflow mold flow analysis, to accurately control the convergence position and speed of the melt front, and fundamentally eliminate visible weld lines and flow marks. For thin-walled areas, the gate size and injection curve are optimized to achieve stable filling.
Efficient cooling and ejection system
Cooling design:
Arrange dense conformal cooling water channels around the curved surface contour of the product to control mold temperature fluctuations within ±3°C. This is the key to ensuring uniform gloss on the high-gloss surface and preventing warpage caused by uneven shrinkage. The compact cooling design reduces the molding cycle by approximately 15%.
Ejection solution:
A combined design of micro ejector pins and gas-assisted ejection is used to ensure complete demoulding of thin-walled parts while avoiding leaving ejection marks on the visible surface.
Process control
All core components are processed using five-axis linkage CNC to ensure the symmetry accuracy of the cavity and core. The repeated positioning accuracy of mold clamping is stable at ≤0.02 mm.
The design life of the mold is no less than 1 million mold times to cope with long-term mass production needs.
Validation and Quality Assurance
As a trusted precision injection mold supplier, we perform factory verification processes that exceed industry standards.
Multi-stage mold trial (T0-T2):
At each stage, customer-specified materials (such as ABS, PC/ABS) are used for mold trial, and process parameters are optimized round by round until the parts fully meet the standards in terms of surface gloss (measured with a gloss meter), color (color difference ΔE ≤ 0.5), size and assembly.
Full-size digitized report:
The trial mold sample is scanned in full size using a three-dimensional coordinate measuring machine (CMM), compared with the 3D model and a color deviation map is generated. The key installation and positioning dimensional tolerances are ensured to be within ±0.05 mm.
Complete document delivery:
Before the mold leaves the factory, it is rust-proofed, wrapped in vacuum packaging and moisture-proof materials, and placed in a reinforced wooden box. The documents delivered with the box include: 2D/3D design drawings, mold flow analysis report, CMM inspection report, steel material and hardness certificate, mold trial video and detailed machine adjustment parameter suggestions.
Delivery and support
This speaker grill mold and air vent cover mold have been successfully delivered to European customers and put into mass production. We provide full-process services from mold design, manufacturing, domestic mold trial, pre-acceptance to international logistics and customs clearance support to ensure a smooth and reliable delivery experience.
If you are looking for a mold solution that combines ultimate appearance requirements with mass production stability for the new generation of automotive interior parts, please contact us. JinYi Mold's professional team will provide you with detailed technical solutions.
About Us
Jinyi Mold was established in 1998 and is headquartered in Dongguan, Guangdong. Our professional team provides injection mold and die-casting mold services, providing you support in every aspect from design, manufacturing to final assembly.
Production equipment:
dozens of CNC machining centers (gantry & 5-axis), injection molding machines (80-1600 tons), EDM machines, automation equipment, etc.
Scope of services:
Establish solid partnerships with Europe, Australia and Asia to carry out international export business.
Company production capacity: A 13,000㎡ production base in Maoming (built in 2022), backing an annual turnover surpassing 150 million RMB.
Honors and qualifications:
Possess High-Tech Enterprise Certification, ISO9001:2015 Quality management system certification.
Logistics and freight:
Logistics follows international transportation standards, and packaging is packed in reinforced wooden boxes, filled with PE foam and wrapped in moisture-proof bags.
Marketing: Selina Chan
WhatsApp:+8618969686504
Email:selina@jy-mould.com
Contact us to discuss how we can support your project needs
Please know that when you choose Jinyi Mold, we are not only a supplier, but also a Chinese manufacturing partner with 25 years of experience in mold design, manufacturing, and assembly.
