In order to reduce the weight of baby walker, most of parts are made by plastic. On the other hand, plastic parts are stronger and colorful. Therefore, the quality of plastic parts of baby walker become very important. The key point of plastic injection mould for making baby walker is to get smooth surface and parting line to avoid injury against babies. Meanwhile, the assembly among of all plastic parts for baby walker is required flat without difference in level, prevent from collapse, enough strong and so on. It has to pay attention on the shrinkage of molds design and precise mold fabrication in order to get perfect assembly of baby walker, especially the small toy parts.

The commonly used children's tricycle mould steels are 45#, 40Cr, P20, 2738, 2316, 718, NAK80, S136, etc. Generally, we suggest to use steel 718 and Shanghai Baosteel P20. Good mold structure design is the premise of a qualified mold manufacturing. The mold structure and product structure should be analyzed in all aspects, including mold draft angle, miniature of product surface, design of pouring system, design of exhaust system, design of cooling system, etc. The most important and most likely problems of these molds will be repeatedly tried in the mold structure design Proven.