6 Things You Should Know About Blow Moulding

1. 6 Things You Should Know About Blow Moulding You will find blow-moulded products in every corner of the world. Whether you are in the plastics industry or a regular consumer, chances are you have come across blow moulding before. But what is it exactly and how do blow moulding machines work? We have compiled a list of answers to some frequently asked questions about blow moulding to help you better understand this process. What is Blow Moulding? Blow moulding is a manufacturing process of producing hollow plastic parts by inflating a heated plastic tube until it forms the desired shape. The simple principle behind blow moulding is mimicking a balloon. By blowing air into a hollow plastic tube, which is sealed on all sides but one, you will make the plastic take the form of a mould.

2. Moulding is highly necessary for manufacturing, construction, and many other industries. In fact, no commercial sector can do without these moulds. What are the Models of Blow Moulding? There are three primary blow moulding models— extrusion blow moulding, injection blow moulding, and injection stretch blow moulding. To explain each briefly: ▪Extrusion blow moulding is when the plastic is melted and extruded into a mould. ▪In injection blow moulding (IBM), resin pellets are loaded into the hopper of the injection moulding machines. The pellets then pass through the extruder and out in melted form. Now the extruded plastic is injected into the preform mould around a core rod. ▪The "injection stretch blow moulding" procedure creates polymer-based, primarily hollow, rotationally symmetric objects. What is the Difference Between Moulding and Casting? Moulding and casting are commonly confused with each other. However, the two are different processes.

3. Though there are several distinctions, the primary distinction between moulding and casting lies in the material used in operation. Moulding concentrates on plastics, while casting often involves metal. In both situations, the melted substance enters a die or mould to produce the final shape. While each method has pros and cons, you should know that moulding is greatly beneficial for mass production. Why is Blow Moulding Used? There are many reasons why manufacturers choose blow moulding over other processes, such as injection moulding or extrusion. Some benefits of blow moulding include ▪The ability to produce complex shapes. ▪Reasonably low tooling costs. ▪A wide range of material choices. ▪High production rates. ▪Increased strength and accuracy of final products. ▪Offers full automation.

4. What are the Disadvantages of Blow Moulding? Every process and method comes with a set of pros and cons. Here are some cons of the blow moulding process. ▪High reliability on petroleum. ▪Significant impact on the environment. ▪Limited to hollow components. ▪Restricted to thermoplastics. ▪Low strength. How Does the Blow Moulding Process Work? The blow moulding process has four main steps: heating, forming, cooling and ejecting. 1) Heating: The first step is to heat the plastic material until it becomes soft and pliable. It is usually done using extruders or chemical vapour deposition. In this phase, the hollow plastic tube produced by the blow moulding machine is called a parison. 2) Forming: Next, an air bubble is introduced into the heated plastic. The air bubble expands and takes on the shape of the cavity inside the mould. 3) Cooling: After forming the desired shape, the part needs to be cooled so that it retains its shape. This step is typically done using water cooling or forced air cooling.

5. 4) Ejection: The last step is to remove the part from the mould manually or automatically, depending on the size and complexity of the part. There are also fully automated blow moulding machines, which makes it much easier to produce huge production quantities. Conclusion There you go! These are some frequently asked questions about the blow moulding process. As you can see, there is a lot that goes into blow moulding! It's an incredibly versatile process that can create all sorts of hollow plastic parts. For sure, blow moulding has its unique processes, advantages, and disadvantages. If you are a business owner considering venturing into the blow moulding business, it is helpful to consider your needs and priorities first and then make a wise decision about blow moulding machines. It also helps to talk to a professional as they can assist you better in understanding your requirements. We hope you now have a better understanding of how blow moulding machines work. Source link: https://sites.google.com/view/know-about-blow-moulding/home?pli=1