Vertical Injection Moulding Machines: Ideal for Electrical Components

What Makes Vertical Injection Moulding Different?

In a vertical injection moulding machine, the clamping unit operates on a vertical axis — the mould opens and closes vertically, with the injection unit mounted above or to the side. This configuration has two major advantages for electrical component manufacturing: gravity assists insert placement and retention in the lower mould half, and the open mould face allows operators to place inserts and retrieve moulded parts simultaneously — significantly improving cycle efficiency.

Key Applications in Electrical Component Manufacturing

Vertical injection moulding machines from Stellar Dawang are widely used in electrical and electronic manufacturing applications where insert placement accuracy, overmoulding quality, and production efficiency are critical.

Wire and Cable Overmoulding

Vertical injection moulding machines are the standard platform for overmoulding cable connectors, strain reliefs, and junction boxes directly onto wire assemblies. The vertical mould orientation prevents the cable from displacing the insert during mould close, ensuring consistent overmould geometry and seal integrity.

Terminal and Contact Insert Moulding

Metal terminals, contacts, and bus bars are placed into the lower mould half, and the plastic housing is moulded around them in a single shot. The vertical configuration ensures gravity holds the inserts in position during placement, eliminating the positional errors common in horizontal machines.

Sensor and Actuator Housings

Precision electrical sensor housings, solenoid coil bobbins, and actuator end caps are produced with tight dimensional tolerances using Stellar Dawang's vertical machines — ensuring reliable component fitment in automated assembly processes.

Technical Advantages of Stellar Dawang Vertical Injection Moulding Machines

• Rotary Table Configuration: Dual-station rotary tables allow one station to be loaded with inserts while the other is moulding — maximising machine utilisation and minimising cycle time.
• Servo Injection Unit: Precise injection speed and pressure profiling ensures consistent fill, pack, and hold across every shot — critical for thin-wall electrical housings.
• Clamping Force Range: Available in 30 to 300 tonne clamping force, accommodating single-cavity prototype moulds through to high-cavity production tools.
• Tie-Bar Free Platens: Improved mould access and larger effective mould area relative to machine footprint — enabling larger insert moulding tools on a compact machine.

Quality and Process Control

Stellar Dawang vertical injection moulding machines feature closed-loop injection control, cavity pressure monitoring, and integrated statistical process control (SPC). Mould temperature controllers, hot runner controllers, and robot integration options support fully automated production cells with consistent cycle-to-cycle quality. All machines comply with CE safety standards and are available with EUROMAP 67 robot interface for automated insert loading and part removal.