5 Major Advantages to Using Plastic Injection Molding for the Manufacturing of Parts

Plastic injection molding is an extremely versatile method for producing parts and products. It’s preferred for manufacturing due to several advantages over other plastic molding techniques. Not only is it simpler and more reliable, but it is also extremely efficient. You can confidently use this method to manufacture parts.

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Here are 5 major advantages of using injection molding for manufacturing plastic parts and components:

1. Detailed Features and Complex Geometry

The injection molds are subjected to extremely high pressure. As a result, the plastic within the molds is pressed harder against the mold compared to other molding processes. This excessive pressure allows for a high level of detail in the part's design.

Furthermore, high pressure during the molding process enables the creation of complex and intricate shapes, which would otherwise be too complicated and expensive to manufacture.

2. High Efficiency

Once the injection molds are designed to customer specifications and the presses are pre-programmed, the actual molding process is significantly quicker than other methods. Plastic injection molding takes less time, allowing more parts to be produced from a single mold. The high production output rate makes this method both cost-effective and efficient. Typically, hot-runner ejection mold systems produce parts with consistent quality and faster cycle times, though they are less versatile concerning color changes and certain heat-sensitive polymers.

3. Enhanced Strength

In plastic injection molding, fillers can be used in the molds. These fillers reduce the density of the plastic while being molded and add greater strength to the part. In industries requiring strong and durable parts, plastic injection molding offers a unique advantage not found in other molding processes.

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4. Ability to Use Multiple Plastic Types Simultaneously

A significant advantage of plastic injection molding is the ability to use different types of plastic simultaneously. This is achieved through co-injection molding, eliminating the concern of using a specific type of plastic.

5. Automation to Save Manufacturing Costs

Plastic injection molding is highly automated. Most of the process is performed by machines and robotics, which a single operator can oversee. Automation reduces manufacturing costs by significantly lowering overheads. Additionally, the reduced labor force decreases the overall cost of manufacturing parts, and this saving can be passed on to the customer.

Moreover, automation allows precise and accurate injection molds, with CAD and CAM ensuring close tolerances in mold making.

The Bottom Line

Injection molding ensures that parts require minimal work after production, as they have a nearly finished appearance when ejected from the molds.

Today, plastic injection molding is an environmentally-friendly process. Scrap plastic generated during production is reground and reused, minimizing waste.

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