There are a couple of types of blow molding machines used for creating bottles. It is critical to determine the processes used for making these bottles. When you choose the right production method, you can reduce your costs while boosting your productivity. Plus, using the suitable bottle blow molding machine means you will not need to spend as long on each item, allowing you to make more.
All About the Single Stage Process
The process makes preforms, blows, and stretches them with one machine before the cooling process. The method is more direct, and the machinery has a blow molding station and injection system on the one device. You can get either a four or three station machine.
The process could include drying the material, injecting it into the preform, and cooling. The process has several benefits, including its flexibility and the fact that the bottles are free of blemishes.
All About the Two-Stage Process
Two bottle blow molding machines are necessary for the two-stage process, including the stretch blow molding machine and injection molding system. The plastic gets molded into a preform in one machine before it goes to the other machine. You might have heard of the process called the cool preform method since it has to cool before the device can stretch or reheat it.
The process of using the blow molding equipment for two-stage functions has a few advantages, such as faster cycle times and flexibility. There are also not as many bottle design restrictions. The manufacturer can stop the process whenever necessary, and for round bottles, there is often excellent wall distribution.
Which One Is the Best?
Your goals will determine which process is better for you. For instance, consider the single-stage process. You have to consider the fact that you can’t inspect the preform before it gets molded. That means your operators will need to know enough about injection and the other processes to see if the preform has any defects.
With the two-stage method, there is the risk of the bottles having scratches since they have to get stored and then transferred. For example, the preform could fall on the conveyor belt before it goes into the storage container, resulting in blemishes. Still, some brands put various labels on the bottles, meaning the scratches might not be noticeable.
Choose the Best Blow Molding Manufacturers Today
Once you understand the differences between two-stage and single-stage blow molding equipment, you’ll have a better idea of which one to pick. For instance, you might use a single-stage if you want a bottle with a precise shape. But if you want to save money, you might wish to a two-stage method. No matter what you pick, PET All Manufacturing, Inc. is here to help. Contact us today if you want to know more.
