Typically, hot runner suppliers offer solutions for custom Pet Bottle Preform hot runner systems and standard hot runner systems. Users should try to choose a standard hot runner system, including standard length and standard size nozzles, runner plates, gate inserts, and more. This is not only because the standard hot runner system is inexpensive, the delivery time is short, and because the interchangeable parts are available, it is easy to maintain.

Plastic processing type
When choosing the hot runner system for injection molds, we must consider plastic resins. For example, if we process glass reinforced plastics (such as glass reinforced nylon materials, etc.). ), the gate insert can provide good wear resistance; if the plastic resin to be easily decomposed (PVC), we should use the external heating system flow path to avoid the flow melting dead angle. If we deal with resins with poor melt flow properties, such as PCs, larger nozzle sizes and larger cross-sectional flow paths need to be prioritized.

Runner size
In order to ensure optimum performance, it is necessary to analyze the processing conditions of a specific resin. Therefore, not only the weight of the product but also the appropriate melt channel size, including melt flow index, injection time, injection molding cycle and melt, are calculated. Temperature, etc. A suitable runner size is critical to the performance of the hot runner, which can result in degradation of the plastic injection molded part or uneven or incomplete filling. In order to determine the optimum size of the melt channel, pressure drop, residence time, temperature, shear rate, frequency, etc. need to be considered.

Multi-zone temperature control
Multi-zone temperature controller systems should be used if the user requires a large, complex hot runner system or if the thermoplastic resin needs to be processed with narrow processing parameters. It allows the user to adjust the temperature locally. Ideal systems should have a uniform hot runner temperature profile, but in practice they may differ due to different factors: the mass of the hot runner heater assembly, the heat loss at the joint between the mold hot runner system and the mold. .

Jilian Plastics is an expert in the production of prefabricated parts. We have skilled technology and rich experience. No matter what you need, you can satisfy you very well. From 5-Gallon Pet Preform to plastic caps, we can also customize the products for you. We believe that we can definitely meet your needs.