National Molding

Plastic Injection Molding: Beyond the Pros and Cons

Can we ask for a few minutes of your time to look around you? What do you see? Dog collar buckles, product packaging, appliances, toys, and more.

Do you notice something common in all of them? If you know by now, all of them are made up of plastic, a quintessential part of modern society.

We are almost surrounded by everything plastic. Aren’t you wondering where it came from, and how it was formed? Those answers may still be left unanswered but don’t fret because you’ve come to the right place to learn about it.

If you will read through, you will learn all you need to know about plastic molding and we’ll answer your questions one by one. Are you ready? Let’s go ahead and start.

How Plastic Injection Molding Began

Perhaps you already know by now that it will take hundreds or thousands of years before plastic will start to break down. It is said that the lifespan of plastic is 10 to 20 times longer than that of humans. Its increasing use in production has caused numerous environmental complications which has lasting effects to our society.

One of the wonderful solutions to this apparent problem is the recycling of plastic bottles and other products made of plastic. Numerous injection molding machines were invented to help us with recycling. It makes use of old plastic products and transforms them into new products which can be used or resold in the market. Most of the end products of this process are used in making household products or storage wares.

The generation of new plastic products from scrap materials may seem like magic and we must give due credit to the brilliant minds behind the creation of the machines that manufacture them. The process has 3 phases.

The first process entails melting of plastic raw materials or duraflex material. It is also called the injection phase. Next process is the molding phase, and last comes the polishing phase.

In the first phase, old plastic products or plastic containers are being crushed or grinded into smaller pieces because most companies find it easier to process it as so. It’s simple applied physics actually. When the surface area is smaller, the faster it will burn. Thus explains the efficiency. The small plastic pieces are then transferred into a very large cylinder to a heated funnel that is hot enough to help the plastic achieve melting point.

As the grinded plastic pieces enter the heated funnel, it begins to melt and soon be instilled in the plastic moldings. The next phase now begins.

During the molding phase, various styles and forms of containers are made available. The heated plastic will be compressed into a mold without leaving any air spaces in between. After it is being compressed, the heated plastic will be allowed to cool and the released from the machines. Most of the time, companies use containers where the cooled separated halves will be collected, facilitating the easy removal of the final product.

The newly formed product will be transferred into a section for final touches. This is the polishing phase. The product will be painted and added with designs. The old plastic scraps finally gains new form.

As you may have already known, plastic injection molding does bring a lot of help to us. Aside from the industry providing numerous jobs to skilled workers and helping Mother Earth, its products are being utilized all over the world every single day. From quick release buckles to plastic packaging, it may all be made with recycled plastic or specially-formulated plastic resin used for the very first time.