Although hot runner molds have many significant advantages compared to cold runner molds, mold users also need to understand the drawbacks of hot runner molds. In summary, there are several points
Rising mold costs
The price of hot runner components is relatively expensive, and the cost of hot runner molds may significantly increase. If the production of parts is small and the cost of mold tools is high, it is not cost-effective economically. For many mold users in developing countries, the high price of hot runner systems is one of the main issues affecting the widespread use of hot runner molds
High equipment requirements
The hot runner mold requires precision machining machinery as a guarantee. The integration and coordination requirements between the hot runner system and the mold are extremely strict, otherwise the mold will encounter many serious problems during the production process If the plastic seal is not good, causing plastic overflow and damage to the hot runner components, interrupting production, and the relative position between the nozzle insert and the gate is not good, resulting in a serious decrease in product quality
Complex operation and maintenance
Compared to cold runner molds, the operation and maintenance of hot runner molds are complex. Improper use and operation can easily damage hot runner parts, making production impossible and causing huge economic losses. For new users of hot runner molds, it takes a long time to accumulate usage experience