With the steady development of the new energy vehicle (NEV) industry, the usage of components such as automotive micro-motors, washer pumps, in-vehicle sensors, and on-board power modules continues to rise, driving parallel growth in the market for their corresponding plastic housings. Beyond basic assembly functions, these housings must also meet multiple performance requirements — including heat resistance, oil resistance, flame retardancy, waterproofing, and lightweight design — placing higher overall demands on the injection molding supply chain.

      Many procurement teams report that sourcing from separate mold factories and injection molding factories leads to high communication costs, unclear accountability, and uncontrollable project timelines. As a result, the integrated mold-and-molding model is gaining increasing favor among manufacturing customers. An integrated factory consolidates mold design, mold processing, mold trials, injection molding, and assembly within a single facility, allowing engineers to assess injection molding risks at the mold stage and reducing the likelihood of later mold revisions and rework.

      Among NEV injection molding categories, micro-motor housings, EPS motor housings, window motor housings, and washer pump housings are typical precision parts with tight tolerance requirements, mostly made from glass-fiber-reinforced modified engineering plastics. This demands manufacturers with proven automotive project experience, a solid understanding of automotive quality control logic, and automated mass production capability to ensure batch-to-batch stability in high-volume production.

      The Yangtze River Delta is home to a large number of NEV OEMs and Tier 1 / Tier 2 component companies, driving the growth of the mold and injection molding industry in Cixi and Yuyao, Ningbo. Many local factories have long specialized in automotive plastic component supply, offering NEV component manufacturers complete services from drawing evaluation, mold development, and prototyping to mass delivery. When selecting suppliers, companies are advised to focus on the factory's equipment configuration, engineers' automotive experience, proven mass production cases of similar housings, and after-sales support mechanisms to minimize project development risks.