All about blow molding machines
Due to the wide variety of polymer (plastic) products, the variety of equipment and machines in this industry is also high. In the plastic injection industry article, we mentioned that the most widely used type of machines in this huge industry are blow molding plastic machines.
What is blow molding?
The design of these machines is such that they have a great ability to produce all kinds of bottles, balls, cans, pots and other plastic products. If you are thinking about investing in the plastic products manufacturing industry, this article can be a good reference for your knowledge.
Types of blow molding machines
Based on the production process of plastic (polymer) products, blow molding machines are divided into two general categories.
1- extrusion blow molding machine
2- injection Blow molding machine
How the blow molding plastic extrusion machine works
In Blowmolding extrusion machine, polymer materials are melted and then come down through the plates in the form of a parison (hollow tube). The technology used in this process is such that when the parisons are lowered, due to the air passing through them, they take on a cylindrical shape. Now, for molding, two mold plates are closed on cylindrical parisons. At this time, after closing the mold plates on the parisons, it is blown into the mold in order to shape them. Finally, the obtained product is cooled by the built-in peripheral equipment.
In the next step, the mold is opened and the product, along with pleats and additions, is pushed out of the mold. At the end, the additions (wastes) are removed from the product and the final product is delivered.
Products such as plastic balls, yogurt containers, bottles, etc. are produced using this mechanism.
One of the characteristics of the products produced in this method is the line around it. The reason for that is the place where the jaws of the machine mold are closed and the place where the pleats are separated.
How the blow molding plastic injection machine works
In the blow molding plastic injection machine, polymer materials are first injected into the first mold. At this time, the product placed on the base takes its initial shape. Then the first mold is opened and the product that is on the base is rotated and placed in the second mold. At this stage, it is blown into the product and takes its final shape. In the next step, the second mold is opened and the middle plate after rotation places the products in the wing part and the product is taken out.
At the end of the products produced by blow molding injection mechanism, a circular protrusion is formed, which corresponds to the place of the first step of injection of polymer materials.
In the production process by injection bloom molding, the product does not have pleats, that’s why the amount of material waste in it is less. At the same time, the appearance quality of the product produced in this method has a better appearance quality due to the absence of pleats during production and no need to cut extra parts, as well as weight control and uniform distribution of materials in the body of the product. It has superiority.
Regarding the capacity of bottles that can be produced in each method, the blow molding injection machine is capable of producing bottles with a very small capacity (less than 140 cc) and the production of these products with this method is very economical, but in large-sized bottles such as Half a liter or more is not economical at all and you should use the air extrusion method.
Another thing that can be discussed in this field is the quality of the product opening, which in the air injection method, there is no risk of deformation and we will see a better surface quality.
Among the limitations of the blow molding injection method is the ratio of the diameter of the opening to the diameter of the bottle, which cannot be more than one to three. This means that large parts such as 4-liter containers of detergents or 220-liter barrels and tanks are This method cannot be produced. There is no such limitation in blow molding extrusion. Another limitation in the production of handle products is that air injection cannot be used.
The price of blow molding machine
As mentioned in the section of types of blow molding machines, these machines can have many different capabilities according to the customer’s needs. Based on this, we recommend you to click on the contact link and contact the company’s sales experts to get technical advice and price inquiries. Or visit the order registration page and enter the required information so that you will be contacted as soon as possible.
If you are looking for a safe investment with a wide range of opportunities to develop your business? As an international active group in the field of production and import of blow molding machines, Danesh Banyan Pars Blow molding Machines Company will be your consultant and companion from idea to implementation.
