Plastic Molding For Beginners: How To Craft Quality Plastic Pieces
There’s no doubt that life would be very different if it weren’t for the various contributions to plastic injection molding. I mean, think about the number of things in your house that would be impossible without the process! Everything from your child’s toys to the window frames around your house have gone through plastic molding. It has become a process that we have thus far relied on heavily, and one might say that it is now permanent to our way of life, at least until something new comes along. At the current rate that plastic injection molding is going though, it just doesn’t seem like there can be much competition in the field. Several decades of work and research have been dedicated to the field of plastic injection molding, and with excellent results, as is clear by the number of products manufactures produce and consumers consume. But where did plastic injection molding come from, and how does it work?
Plastic injection molding is actually more economically friendly than a lot of other industrial processes. Consumers continue to want more products, so looking for the safest and most practical way of creating them is always an issue. Plastic injection is a process that creates a huge variety of plastic consumer products to be mass-produced and sold by plastic manufacturers all over the globe. It has been practiced for almost two centuries, and has come a long way since it’s beginnings in 1868.
Injection molding was invented by John Wesley Hyatt in 1868; this was the first time the process had ever been seen before. He began to make billiard balls by injecting a material called celluloid into sphere-shaped molds. Celluloid was invented in the 1820′s, and was most often used because it looked similar to ivory or bone. Soon after his first steps into plastic injection molding, Hyatt looked to make the process easier on himself, so he created the very first injection molding machine (which employed the use of a plunger-type piece).
Soon, the word began to spread about plastic injection molding and all of its benefits, and little by little it started to expand. The machines were revolutionized, and by 1946, a man by the name of James Hendry had completely transformed John Wesley Hyatt’s original model for the plastic injection molding machine. Instead of a plunger technique like Hyatt’s, Hendry implemented a large industrial screw, which proved to be much more efficient. This made it so much easier to create PVC pipes, and sell more of them for a cheaper price to both consumers and producers.
The first thing for a manufacturer to consider when beginning the plastic injection molding process is the type of plastic that they want to be creating their products from. There are quite a few variations of plastic that are too unsafe, and plastic companies make it their duty to produce safe goods for their customers. That’s why it’s important to use the right kind, usable plastics consists of polyvinyl chloride (also referred to as PVC, often used for piping), acrylic, teflon, delrin, and polystyrene; which all come as raw beads referred to as resin.
The tricky thing about plastics, and something to always be aware of, is that they are non-degradeable, so they aren’t good for the environment. Plastic injection molding, however, is a much safer way of processing plastics and it even reduces waste. The plastics are able to be used and reused as many times as you want, so that’s really another important reason to reduce, reuse, recycle! Also, plastic injection molding companies are aware of which plastics are not safe for consumer use, and work to provide the safest means of producing non-harmful products.
Once the plastic is chosen, it’s time for the plastic extrusion process to really begin. First, engineers load the beads (or resin) into a device referred to as a feed hopper, which basically allows for the plastic to be gravity-fed into the rest of the machine. The hopper pours the resin into a barrel-shaped heating cylinder, which heats the plastic at temperatures up to 400 degrees Fahrenheit. As the cylinder is heating, the screw will start up, using extreme force on the melted plastic.
After this, the molten liquid plastic passes through a complex series of thin screens, which are meant to catch any flaws or contaminants in the molten resin. These screens are held together by a puck-like piece of metal with holes drilled into it. The molten plastic is pushed out through these holes and into the final part of the machine called the die. The die is responsible for giving the plastic its shape, whether it be a knob or a window frame!
There’s a cooling process where the molded parts are placed into a bath-like holding center, and then shipped out to consumers everywhere. Plastic molding is far more important than you think, it’s responsible for things as vital as hurricane shutters! The whole extrusion process only takes just a few minutes, contact a PVC pipe manufacturer for more information!
Gabrielles Wish – Processed sampler
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