Basic knowledges of injection molding processing

When it comes to plastic processing, injection molding processing is undoubtedly an indispensable core technology. Ranging from small items like mobile phone charger casings to large ones such as home appliance bases, over 60% of plastic parts are produced through this method. It can quickly transform granular polymer raw materials into practical products of various shapes. Today, we will start with examples from daily life and break down the process of this technology step by step.

The application fields of injection molding processing

Before delving into the process, let's first take a look at its "masterpieces". You don't need to look for them deliberately—many items you come into contact with casually are the results of this technology, especially in these high-frequency scenarios:

- Daily Small Items: Plastic hanger hooks at home, caps of seasoning bottles in the kitchen, soap boxes in the bathroom, and even plastic toy blocks for children. This plastic injection mold processing can accurately form the curvature of hooks and the threads of bottle caps, and it enables mass production with low cost and high durability.

- Digital Appliances: Middle frames of mobile phones, bases of laptops, and casings of air conditioner remote controls. It can make the surface of plastic parts smooth without burrs, and can also embed metal components (such as the key shrapnels in remote controls) to achieve "one-time molding".

- Environmental Protection Field: Currently popular degradable products, such as PLA (polylactic acid) takeaway spoons and corn starch-based garbage bag storage boxes. It can well adapt to bio-based materials, creating stable structures while retaining environmental protection properties.

The process of injection molding

1. Raw Material Preparation: "Enhance" the granules (e.g., drying to remove moisture)

2. Melting and Plasticizing: Turn solids into fluids

3. Mold Clamping: "Close" the mold tightly to prepare for "receiving materials"

4. Injection and Mold Filling: "Squeeze" the fluid into the mold

5. Pressure Holding and Cooling: Let the fluid "set into shape"

6. Mold Opening and Part Removal: "Take out" the finished product

That's all the information for today, and it should include what you want to know. Hejia Tech has focused on injection molding processing for more than 20 years and provides you with one-stop solutions from design to production.