Should injection mold choose hot runner or cold runner?

Hot runner mold and cold runner mold are two different injection mold designs. Hot runner die is suitable for products with high requirements on molding quality and production efficiency, while cold runner die is suitable for products with low requirements on molding quality and production efficiency.

Hot runner mold is a kind of mold forming by heating plastic melt. It can keep the plastic of the runner and gate in a molten state in each molding, so as to avoid solidification phenomenon in the cooling process, and improve the molding quality and production efficiency. Hot runner mold is usually suitable for expensive plastic materials, large molding size or complex shape products.

The cold runner mold is a kind of mold that does not need to heat plastic melt. It is formed by setting a cooling channel in the mold cavity to cool the molten plastic and then flow out of the mold, so as to realize the product. Cold runner die is usually suitable for simple shape, small size or small production batch products.

When choosing the cold runner and hot runner of injection mold, many factors need to be considered, including economy, production design and manufacturing cycle, mold cost, etc. Generally speaking, the production design and manufacturing cycle of hot runner die is longer than that of cold runner die, and more links are involved. Therefore, in terms of the die cost itself, it may be more economical to choose hot runner die. In addition, the hot runner mold can be formed once, without the need for secondary processing, higher production efficiency, but also easier to realize automatic production. However, there are also some shortcomings in hot runner mold. For example, the mold structure is more complex, more materials and processing technology are needed, so the cost is relatively high. Therefore, in the choice of cold runner mold and hot runner mold, it is necessary to weigh according to the specific situation.

In addition, you also need to consider the use of the mold scenario and requirements. For example, for some molds that require high molding accuracy, or need to rapidly mold a large number of products, hot runner molds may be more suitable. And for some of the molding accuracy requirements are not high, or the need for mass production, cold runner mold may be more suitable. Therefore, when choosing the cold runner and hot runner of injection mold, it is necessary to choose according to the specific use scenario and requirements.

In short, the choice of injection mold cold runner and hot runner need to consider a number of factors, including economy, production design and manufacturing cycle, mold cost, etc. In the specific selection, need to weigh according to the specific situation, choose the most suitable mold type.