As of 2024, the injection molding market is worth $192.7 billion. It’s also consistently growing, so automotive part manufacturers can rely on consistent production methods for high-quality parts.
However, many people still wonder about the differences between compression molding vs injection molding. Here, we’ll discuss:
- The basics of these two molding methods
- Differences in molding techniques and why they matter
- The advantages of injection molding
- The applications of both production methods
Read on to discuss the benefits of the molding methods available to you.
Compression Molding vs Injection Molding: The Basics
Both compression molding and injection molding are processes for producing plastic products. They use molds to shape these items. These techniques are especially important for automotive applications because they produce car parts like:
- Bumpers
- Fenders
- Splash guards
- Headlights
- Side mirrors
- Grills
However, the process for compression molding vs injection molding greatly differs.
Compression molding uses an open mold. The manufacturer places plastic inside of it and clamps the mold down over the unformed plastic. This compresses it into the appropriate shape.
On the other hand, injection molding uses a closed mold. Melted plastic gets injected into the mold’s cavity with a series of tubes and other insertion tools. The plastic cools and solidifies into the shape of the mold before manufacturers extract it.
Differences in Molding Techniques
These processes differ in several ways. Injection molding is a completely automated process. It:
- Requires no supervision from manufacturing professionals
- Relies on automated programs that fill the mold
- Allows molds to be as detailed as necessary
- Ensures a consistent output every time
On the other hand, compression molding requires frequent intervention from manufacturing experts.
This means that injection molding:
- Has a shorter production time than compression molding offers
- The output is more precise (and detailed)
- The lack of constant supervision means lower labor costs
One of the biggest advantages of injection molding is that it’s low-effort and therefore low-cost.
Which Is Right for Your Needs?
Compression molding applications extend to:
- Simple designs
- Large panels
- Small batch production
It also has lower tooling costs, but the costs of labor are higher than those for injection molding. It also has less material waste, but it frequently takes more electrical energy.
The injection molding process is a better alternative for most needs. It’s ideal for:
- Complex parts
- Detailed designs
- High production volumes
- Lower overall costs
- Shorter production cycles
A good injection molding company can ensure you get the best results for your money. Whether you want large parts or smaller detailed ones, there are multiple options that you can choose from to meet your specific needs.
Save on Costs and Labor With Injection Molding
Now that you know the differences between compression molding vs injection molding techniques, it’s time to get started.
Nova Stevensville offers custom injection molding services for manufacturing quality plastic car parts. Whether you want small batch production or a bulk order, we’re excited to listen to your specific needs and bring your vision to life.
Request a quote for your project to learn about costs and timeframes!
