How To Choose Suitable Injection Mold Tools?

There are three general categories of plastic injection mold tools that product designers can consider when making finished parts. They each have advantages, largely depending on the intended volumes. Each category is suitable for different production needs,  and the selection should be based on the expected output. ​

Three general categories of plastic injection mold tool

1. Single-cavity molds

This is the most fundamental and common type, and only one part can be manufactured in one production cycle. It has a fast manufacturing speed with low cost (for basic shapes) and easy control of processing parameters, making it suitable for small-batch production. However, the production speed is slow and the cost per piece is high. ​

2. Multi-cavity molds

This category has at least two cavities and cores. The cavities are of the same shape and come in pairs. They can produce dozens or even hundreds of parts in one cycle, making them suitable for large-scale orders. They have a relatively low unit cost and good color consistency. However, its design and manufacture are time-consuming and costly, require mold flow analysis, and the gate, runner, and cooling system are more complex, which may require adjustment of the part orientation. ​

3. Family molds

This category also has multiple cavities and cores, but with different shapes and sizes. They can produce all the components required for assembly in one cycle, which is conducive to ensuring the color matching of the components. However, its design requires pressure balance, the system is complex, the cost is high, the preparation time is long, and it may need a hot nozzle flow channel. ​

When making a choice, production volume should be taken into account. Single-cavity molds economically and efficiently meet small-batch demands; Multi-cavity molds significantly reduce the cost per piece in mass production. The family mold is specifically designed for complex assemblies that require matching multiple components in the same molding process. Output is the key driving factor for decision-making.

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