What Are The Major Systems of an Injection Mold?

Plastic products around us are inseparable from injection molds. The core of a high-quality mold lies in the collaboration of eight major systems, which determine product accuracy, production efficiency, and cost.

Below, SG PROTO breaks down these eight core systems for you.

1. Molding System: The "Creator"

The molding system determines the shape, dimensions, and surface finish of the product. It consists of the cavity (outer surface) and the core (inner surface). High-quality mold steel is typically used to ensure precision and smoothness.

2. Gating System: The "Delivery Route"

The gating system serves as the delivery channel for molten plastic, connecting the injection machine to the cavity. It includes the sprue, runners, gates, and cold slug well. To reduce waste and improve filling efficiency, runner design must be optimized.

3. Ejection System: The “Demolding Robotic Arm” for Molded Products

The ejection system ensures the smooth demolding of molded products. Common methods include ejector pins and stripper plates. SG PROTO precisely designs ejection positions and forces to prevent product deformation or scratches.

4. Cooling System: The “Central Air Conditioning” for Efficiency

The cooling system controls mold temperature through circulating water channels, shortening the molding cycle and ensuring uniform cooling. We design conformal cooling channels based on product shapes to suit high-temperature conditions and ensure system stability.

5. Guide and Positioning System: The “Precision Guide” for Mold Opening and Closing

Composed of guide pins and bushings, this system ensures precise alignment during mold opening and closing, preventing misalignment defects. SG PROTO uses high-precision fittings to guarantee stability in mass production.

6. Venting System: The “Pressure Release Valve” for Defect Prevention

The venting system removes air and gases from the cavity through vents, avoiding defects like bubbles and burn marks. Vents must be precisely placed to balance efficiency and prevent material overflow.

7. Side Core-Pulling System: The “Forming Magic Tool” for Complex Structures

This system handles complex products with side holes or undercuts. It uses angled guide pins or hydraulically driven sliders for core-pulling to enable smooth demolding. Experienced mold manufacturers employ hydraulic drive for precise control, ensuring accuracy in complex structures.

8. Mold Base Support System: The “Solid Skeleton” of the Mold

The mold base support system acts as the mold’s “skeleton,” supporting and fixing components, distributing pressure, and providing standard mounting interfaces. Experienced manufacturers select mold base materials as needed and optimize structures to ensure rigidity and lifespan.

The collaboration of these eight systems determines mold performance and product quality. SG PROTO provides customized mold solutions for various industries, ensuring precision, stability, and efficiency throughout the process.

If you need injection molds, whether for simple or complex structures, feel free to contact us. Our professional expertise will support you all the way!

Take action now:

1. Click [Online Consultation] to get an evaluation of your product’s mold design plan.

2. Send your drawings to info@sgproto.com to inquire about the latest quotes and delivery times.

3. Leave your product requirements, and we will contact you within 24 hours.