The use of a blow molding machine is a process of fabricating items from plastic. The uniqueness of this process is that it is specifically related to the manufacturing of hollow plastic items like jars, bottles, containers, etc. The process goes like this that first, a thermoplastic is melted and turned into liquid completely. This melted plastic called parison is then poured into a mold, where it is then inflated by blowing air into the mold. The inflated plastic is then left to dry with the mold for some time. Perhaps at the end, a hollow plastic item is obtained. This is the entire blow-molding process, but there are a variety of different machines that are used to perform this process. Each machine does the same thing, but differently; this is what creates a slight difference between the obtained products of each machine. With this being said, let's have a look at each machine to understand the difference in their working and functionality. By comparing and contrasting each machine, we will get to know the advantages that each machine produces, and this will aid you in choosing the right machine according to your need.
The structure of an inverted head injection blow molding machine is like this that the hydraulics of this are present under the mold sitting at the base of the machine. The presence of hydraulics below the mold is a beneficial thing for getting a high-quality product in the correct desired shape. If the hydraulics are present above the mold like in some machines, then the hydraulic oil keeps leaking into the mold and contaminates the mold or the product. This is why the hydraulic oil, even if it leaks, is far away from getting into the mold or fouling the product. The other advantage of this machine is that since it has a pull-down tie bar system, it is best suited to use for large volumes of material. It can take up to 45 to 205 tons of material. This machine applies pressure directly to the center of the mold, which helps in preventing flexing that can cause the frame to crack; this is another plus point of this machine that you can count on. Hence the ultimate design of this machine is the best and has made this machine the most widely used injection blow molding machine.
The structure of this machine is similar to that of an inverted head injection blow molding machine. The difference comes here that the hybrid screw of this machine is 100% electric. This difference gives the inverted head hybrid injection blow molding machine the ability to save up to 30% of the energy as compared to the standard inverted head machine. The other benefit of using the inverted head hybrid machine is that its cycle times are faster than the standard inverted head machine. The cycle times of the inverted head hybrid machine are up to 15% faster than the standard inverted head machine. Some additional benefits of this machine that can also be counted are that this machine produces no noise and causes very low pollution.
The structure of this is again the same as that of the standard inverted head machine. Like an inverted head hybrid machine, this machine also saves 30% energy and has faster cycles times up to 15%. It also has a full-type hydraulic system. The benefit of this machine is that since it is driven by AC servo motors and controllers for being fully electric, the product that is obtained through this machine is highly stable in its shape and quality.
This machine is slightly different in its structure from the inverted head blow molding machine series. However, the technique that this machine uses helps it to get the same high-quality products as that of all the inverted head machines. The benefit of this machine is that it is very reasonable as compared to all the inverted head machines. Therefore, if you can get the same quality product from a cheaper machine, then why won't you. This is why this machine is used widely.
The injection blow molding technique has become the mainstream process for making hollow plastic items and has left all the traditional practices behind. This technique gives the ability to make complex designs that were not possible in the past. The strength and efficiency that are obtained by the products through this technique are beyond comparison. The use of machines makes the entire blow-molding process very cost-effective as there is no need for labor in this procedure. The entire process is carried out with the help of a machine. Therefore, fast production of complex plastic items at low cost. This technique is also very environmentally friendly as it produces reduced waste as compared to other techniques.