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Our customer is one of the leading automotive manufacturers globally with roof, battery & thermo systems based in the USA. He selected Alpine Mold as his trusted automotive injection mold company due to our extensive experience in delivering high-quality molds for the automotive industry.
Our proven track record with similar vehicle roof projects gave him confidence in our technical capabilities. Additionally, he valued our prompt and clear communication throughout the project, which ensured smooth collaboration and timely responses to his evolving needs. This strong partnership allowed us to fully understand and meet his strict requirements for durability and precision.
1. The customer required exceptional durability and stability for the vehicle roof, creating significant challenges in the mold structure design of the automotive sunroof frame.
2. Manufacturing a large sunroof cover with this automotive plastic injection mold demanded strict control over deformation, posing a major technical challenge.
A separately designed cooling system manages the hot runner and the main runner contacting the injection molding machine nozzle. This ensures stable manufacturing of the vehicle roof housing.
2. Adoption of 5 Hot Valves
The mold design for the plastic vehicle roof cover incorporated 5 hot valves, offering two key advantages:
Precise control of injection gate sequence for each nozzle, effectively eliminating melt lines and enhancing the impact resistance and durability of the plastic parts.
Smooth injection gate areas that require no post-processing, preventing defects commonly caused by gate trimming.
Given the large size and PP+30%GF material, vehicle roof parts are prone to deformation. We performed a pre-deformation analysis during mold design, applying corrections to counteract deformation and ensure the final product matches design specifications.
1. Independent Cooling System 
2. Adoption of 5 Hot Valves 
3. Pre-Deformation Analysis
As a leading automotive plastic injection mold manufacturer in China, Alpine Mold provided the customer with professional DFM feedback that mitigated risks and accelerated the production process for their vehicle roof plastic parts. After confirming our DFM and mold design, we commenced manufacturing the automotive injection mold under strict quality management standards.
This resulted in high-quality molds and T1 samples delivered promptly, helping the customer reduce both time and cost. For new projects requiring a reliable automotive injection mold company or injection molding services, especially for vehicle roof components, please feel free to contact us!
