While general web searches confirm that plastics are used for items like packaging and household goods, the specific list (car interior trim, remote controls, keyboards, cosmetic packaging) is not directly corroborated by multiple independent sources. The evidence is general regarding plastic uses.

The concept that the automobile sector is a major market for plastic molds is implied by the context of the search results (e.g., mentioning auto/automobile in relation to the industry), but no single source explicitly details the 'indispensable role' or the specific nature of the molds in the automobile sector as a standalone, verifiable fact across multiple sources.