What is Plastic Injection Molding?
Even the smallest plastic parts can have an impact on the overall quality of a larger component. Precision, quality, and attention to detail are critical fundamentals in the plastic injection molding industry, and it’s an industry that impacts a range of sectors.
When a team in need of plastic injection molding services understands the process, they can make informed decisions about the plastic injection molding company they work with. In this blog, we will walk you through the basics of plastic injection molding for those who have ever thought: What is plastic injection molding?
What is Plastic Injection Molding?
Plastic injection molding is a process where molten plastic is injected into a steel or aluminum mold, utilizing pressure to form it before it is cooled and ejected as a completed part. This requires a custom mold being inserted into a high-end injection molding machine, where the injection process then begins. The machine used to execute the plastic injection molding process has to be one of high-quality that is consistently maintained and operated by a trained team.
Before the actual injection molding process begins, an experienced company will first fine-tune a design, establish materials, and ensure a quality mold is created. These steps are necessary to ensure a quality part is produced.
How the Process Works
There are four key stages in the injection molding process:
Step 1: Clamping
The machine takes each mold half and presses them together before the plastic is injected.
Step 2: Injection
Molten resin is then slowly injected into the mold cavity, where the machine maintains a controlled pressure and is monitored closely by a trained staff.
Step 3: Cooling
The machine will hold the mold halves in place as the plastic part cools and takes the shape of the mold.
Step 4: Ejection
Once the plastic part is completely cooled and solidified, the machine releases the new plastic part from the mold.
At Camcar Plastics, our team maintains rigorous quality control in order to ensure each part is up to standard. This is repeated continuously until your production has completed its run.
What Materials are Typically Used?
There are a range of materials to choose from when it comes to plastic injection molding, and each one is dependent on your part’s needs and the purpose of your part.
The material selected is important, especially if you need to consider finished features like temperature tolerance, chemical resistance, or structural load.
For example, a nylon material is wear-resistant and heat tolerant, making it a good choice for mechanical or industrial components. Where polypropylene is lightweight and heat tolerant, meaning it’s usually ideal for single-use medical equipment.
At Camcar Plastics, our team will walk through your product’s end-use requirements to ensure the correct material is selected before production begins.
Why Buyers Use this Process
Plastic injection molding is most ideal for high-volume production. The capabilities mean a company can expect the following pros: tight tolerances, high repeatability, low per-unit cost at volume, minimal material waste, and design flexibility.
Tight tolerances means your plastic parts fit and function as intended, and high repeatability means a high-volume of parts can be produced to standard every time, over and over again.
The process also means the materials you purchase for your part are used optimally, reducing waste and assisting in a lower cost per-unit.
From the production efficiency to the cost-saving qualities, the positive outcomes when working with an experienced plastic injection molding company speak for themselves.
What Industries Use Plastic Injection Molding
Small plastic parts are intertwined within our daily lives, and most that we see are likely created using the plastic injection molding process.
There are a multitude of sectors that rely on injection-molded components: industrial, consumer, medical, automotive, and defense and aerospace.
Whether it’s a syringe in the medical industry or the small fixtures you see overhead of you on an airplane — if you see a small, plastic part, it’s more than likely produced using plastic injection molding.
Conclusion
When it comes to the high-volume manufacturing of plastic parts, the plastic injection molding process is a quality method of production. From the ability to maintain tight tolerances to repeatedly producing plastic parts of quality, it’s well-suited for any plastic manufacturing that requires quality and precision.
If you’d like to learn more about how plastic injection molding can fit your production needs, fill out our interest form here.
