English
عربى
Español
What are the key factors in choosing a preform mold?
Jul 06,2022
We often worry about what kind of hot runner nozzle to choose for the preform mold. In fact, the factors that affect the choice of the hot runner nozzle for the preform mold are: plastic raw materials, product quality, nozzle, mold, cycle, gate, runner, Temperature controller, injection molding machine performance, product design. When the enterprise has an accurate understanding and grasp of these, it can choose the appropriate hot runner nozzle for the preform mold.
1. Plastic raw materials: Different German plastic raw materials have different processing variables, and those processing variables will affect the choice of hot runner system.
2. Product weight: Products of different weights have completely different requirements for hot runners.
3. Nozzles: Nozzles can generally be distinguished by size, temperature distribution, physical properties, materials used (copper, steel, etc.), and the difficulty and price of maintenance.
4. Mold: what is the number of image cavities? How is the nozzle distribution distance? What kind of materials are processed? These are all mold elements related to the optional hot runner system.
5. Cycle cycle: Fast production cycle means increased requirements for nozzles. For example, nozzles need to deliver heat accurately and be durable.
6. Gate: For the point gate, in order to maintain a good thermal balance in each molding cycle, the tip of the heat flow nozzle must have the function of melting the material and cooling the seal. The valve gate uses a mechanical method to seal the gate.
7. Runner: The use of the hot runner system avoids the generation of material handles, thereby saving raw materials and eliminating the need to remove the material handles by hand, robotic arms or other methods in the past.
8. Temperature control: Each nozzle must be connected with a relatively complex temperature controller.
9. The performance of the injection molding machine: it can install a mold of a given size, provide sufficient clamping force, operate according to the requirements of cycle time, plasticize enough materials, and so on.
