The preform mold is an indispensable and important component in the plastic bottle molding process. If you plan to expand into a new bottle molding business, choosing a high-quality preform injection mold is necessary.
There are many preform mold suppliers around the world, so choosing the right preform injection mold is not an easy task. In this article, we will try to clarify what we should pay attention to when choosing a preform mold suitable for our needs.
PET bottle preform molds are designed using 3D computer graphics and can produce various bottle preforms according to customer requirements, such as shampoo bottles, medicine bottles, soy sauce bottles, mineral water bottles, carbonated drink bottles, etc.
Characteristics of PET mold:
1. Multi-cavity points: There are mature technologies from 4 to 32 cavities, simplified hot runner work, and low cost.
2. High efficiency: using a simplified dispensing hot runner, no glue waste, and the cycle can reach 5 seconds.
3. Long service life: The mold cavities are all made of high-quality mold steel, and the mold guide posts and bushings adopt oil-free lubrication, which has the strong advantage of being pollution-free and having a service life of tens of millions of times.
4. Special design of the blade: The swing-ring blade adopts a split structure, which allows the blade to be positioned accurately, perfectly overcoming the defects of inferior products such as poor overall blade positioning accuracy and easy damage.
1. High temperature performance
The material of the preform mold should have high anti-tempering stability to ensure that the mold has high hardness and strength under the working temperature.
2. Corrosion resistance
When some plastic bottle preform molds are in operation, the surface of the mold cavity will be eroded by decomposition gas, resulting in increased surface roughness and aggravated wear and failure.
3. Heat and cold fatigue resistance
During the working process, it will be in a state of repeated heating and cooling, which can easily lead to mold failure. Therefore, this type of mold must have high resistance to cold and heat fatigue.
1. Plastic raw materials: Different 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 runner.
3. Nozzles: Nozzles can generally be distinguished by size, temperature distribution, physical properties, materials used (copper, steel, etc.), as well as ease of maintenance and price.
4. Mold: How many cavities are there? What is the distribution distance of the nozzles? What kind of materials are processed? These are all mold elements related to the optional hot runner system.
5. Cycle time: Rapid production cycle means increased requirements for nozzles. For example, the nozzle needs to deliver heat accurately and be durable.
6. Gate: For point gates, in order to maintain a good thermal balance in each molding cycle, the hot nozzle tip must have the functions of melting materials and cooling and sealing. The valve gate uses mechanical methods to seal the gate.
7. Runner: The use of hot runner system avoids the production of material handles, thus saving raw materials and eliminating the previous process of removing material handles by hand, robot or other methods.
Plastic bottle preforms will continue to evolve in the coming years. PET preform molds must meet the ever-changing demands of the manufacturing environment and competitive markets. Therefore, it is important to choose a professional embryo mold supplier. If your company needs to customize high-quality preform molds, then you can choose to contact us. We will provide you with first-class service!
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