What are the options for hot runner nozzles? Yizheng […]
What are the options for hot runner nozzles? Yizheng technicians pointed out: product quality, product design, plastic raw materials, molds, cycles, gates, nozzles, runners, temperature controllers, and injection molding machine performance. When we have a very accurate understanding of these, we can choose a suitable hot runner nozzle for it. How to choose the correct preform mold?
Product weight: products of different weights have completely different requirements for the hot runner.
Plastic raw materials: Different plastic raw materials have different processing variables, and these processing variables will affect the selection of the hot runner system.
Mold: What is the number of cavities? What is the dispensing distance of the nozzles? What kind of material is processed? These are the mold elements associated with the optional hot runner system.
Cycle time: Fast production cycle means an increase in nozzle demand. For example, the nozzle must accurately transfer heat and be durable.
Gate: For point gates, in order to maintain a good thermal balance in each molding cycle, the tip of the hot runner must have the function of melting the material and cooling the seal. The valve gate is sealed mechanically.
Nozzles: Nozzles can be distinguished by size, temperature distribution, physical characteristics, materials used (copper, steel, etc.), ease of maintenance and price.
Flow path: The use of the hot runner system avoids the production of material handles, thereby saving raw materials, and there is no need to remove the handle by hand, manipulator or other means.
Temperature control: each nozzle must be connected to a relatively complex temperature controller
The performance of the injection molding machine: it can install a given size mold, provide sufficient clamping force, operate according to cycle time requirements, and plasticize enough materials.
Product design: Generally, we all know that the product design is completed first, but the final molding is completed in the hot runner mold. In order to ensure that the product has a smooth appearance at the end of molding, it is easy to mold, and these factors must be considered in the structural design of the product.