1. rising mold costs
Hot runner components are expensive, and hot runner mold costs can increase significantly. If the production of parts is small, the proportion of tooling costs is high and it is not economical. For mold users in many developing countries, the high price of the hot runner system is one of the major issues affecting the widespread use of hot runner molds.
2. hot runner mold production process equipment requirements
Hot runner molds require precision machining machinery as a guarantee. The requirements for the integration and cooperation of the hot runner system and the mold are extremely strict, otherwise there will be many serious problems in the production process of the mold. If the plastic seal is not good enough to cause the plastic to overflow and damage the hot runner components to interrupt the production, the relative positions of the nozzle inserts and the gates are not good, leading to a serious decline in the quality of the products.
3. operation and maintenance complex
Compared with cold runner molds, hot runner molds are complex to operate and maintain. If the use of improper operation is very easy to damage hot runner parts, so that production can not be carried out, resulting in huge economic losses. For new users of hot runner molds, it takes a long time to accumulate experience.