What Are Injection Types? (A Straightforward Guide for Mould & Plastic Pros)

If you work in mould making or plastics, you’ll see the word “Injection” everywhere — on websites, RFQs and technical meetings. It refers to Plastic Injection Moulding, the core process for manufacturing plastic parts.

For overseas clients, “Injection Types” covers two areas: mould types and injection processes. This guide shares practical industry English terms to smooth your cross-border communication.

What Is Plastic Injection Moulding?

Plastic Injection Moulding melts plastic pellets and injects molten plastic into a steel or aluminium mould under high pressure. Once cooled, you get precise solid plastic parts. It is widely used from tiny gears to automotive dashboards.

Mould Types By Product Application

Auto Parts Mould Used for car interior & exterior plastic components. Client focus: Dimensional accuracy, material certification and OEM compliance.

Motorcycle Parts Mould Used for fairings, panels and headlamp housings. Client focus: Premium surface finish and aesthetic appearance.

Home Appliance Mould For washing machine panels, AC and vacuum parts. Client focus: Large part production, clamping force and cooling efficiency.

Household Product Mould For storage boxes, chairs and kitchenware. Client focus: Cost efficiency and high cavitation to lower unit price for mass production.

Common Injection Moulding Processes

Standard Injection Moulding Single material & single colour process. Ideal for 90% of regular housings and structural parts.

Overmoulding (2K / Two-Shot Moulding) Inject soft material over a hard plastic substrate (e.g. soft rubber grip). Great for hand tools and ergonomic products.

Insert Moulding Pre-place metal inserts inside mould before plastic injection. Creates strong integrated parts with metal threads in one cycle.

Gas-Assisted Injection Moulding Inject nitrogen gas into molten plastic to form hollow sections. Reduces weight and eliminates sink marks for thick large handles and furniture.

Key Factory Capabilities to Present

• Mould Design: DFM report, early risk evaluation before steel cutting

• Mould Manufacturing: High-speed CNC & EDM machining

• CNC Machining: Custom metal cutting service

• 3D Printing Prototyping: Rapid prototyping to validate designs before formal moulding

Summary For international mould business, “Injection Types” means matching suitable moulds with proper injection technology. Whether you produce auto/motorcycle moulds or deliver overmoulding solutions, using standard technical terms builds credibility and trust with global buyers.