Plastic Refrigerator Mould

The refrigerator door handle is a critical aesthetic and functional component, integrating the column and handle into a single unit. At Zhongyue Mould, we provide high-precision Plastic Refrigerator Moulds designed for mass production of both freezer and convertible compartment handles.

Utilizing advanced 1-Mould-2-Cavities technology, our Moulds allow manufacturers to produce two different handle designs simultaneously within a single cycle. This approach significantly improves production efficiency and reduces manufacturing costs while maintaining the stringent appearance standards required by the appliance industry.

Technical Challenge: Why Handle Moulds Are Difficult

Refrigerator door handles are classified as long, thin-walled parts with complex geometries. The primary challenges include:

Surface Quality: No gate marks, weld marks, bubbles, or scratches are permitted.

Complex Geometry: Features include deep undercuts (up to 14.3mm), reinforcing ribs, display windows, and curved surfaces.

Dimensional Accuracy: The mating surfaces (S1 & S2) must be perfectly flat to connect seamlessly with the door shell.

Material Flow: With lengths exceeding 900mm (for freezer handles) and average wall thicknesses of 1.8mm, maintaining melt flow balance over a long distance is critical.

Zhongyue’s Engineering Solution

To overcome these challenges, we implemented a robust Mould design focusing on three core technologies: Gating, Cooling, and DeMoulding.

1. Sequential Valve Hot Runner System (Zero Weld Lines)

To prevent ugly weld lines on the visible surface of the handle, we employ a Timing Needle Valve Hot Runner System.

Technology: One-way sequential valve control (G1→G2→G3→G4→G5).

Structure: Combines a primary thermal nozzle, hot runner plate, and secondary thermal nozzles.

Benefit: By controlling the opening/closing time of each nozzle via solenoids and a controller, we manage the melt flow front. This effectively eliminates weld marks or moves them to non-critical, hidden surfaces.

Layout: 5 gates for the longer freezer handle and 4 gates for the shorter convertible handle, ensuring balanced filling.

[Insert Image: Figure 3 - Gating System Layout]

2. Multi-Directional Core Pulling & DeMoulding Mechanism

With undercuts distributed across different planes (T1–T7), a simple ejection won't work. Our Mould integrates multiple deMoulding systems:

[Insert Image: Figure 5 - Angled Guide Post & Slider Mechanism]

3. 3D Cooling System for Thermal Balance

Uneven cooling leads to warpage. We designed a sophisticated water cooling layout:

Fixed Mould Inserts: 8 groups of cooling channels (~15mm from cavity wall).

Moving Mould Inserts: 6 groups of circuits (circulating pipes + baffle water wells).

Sliders: Dedicated circulating water pipes for large sliders.

Result: Rapid and uniform cooling, balancing the Mould temperature between 80–90°C to prevent shrinkage and internal stress.

Mould Working Process

Injection: Plastic melt (ABS) enters through the sequential valve hot nozzles (G1–G5) in a timed sequence.

Opening & Core Pulling: The Mould opens, and angled guide pins drive sliders for lateral core pulling.

Ejection: The push plate activates round push rods and push blocks to eject the finished handles (Distance: 60mm).

Reset: All components return to their initial positions, ready for the next cycle.

How we processing the project?

About us

Driven by the philosophy:

“Quality Makes the Future, Focus Creates Professional”

Zhongyue Mould is a leading company in the plastic injection air conditioner Cover mould industry. Our highly experienced team of engineers and designers have many decades of combined experience in plastic air conditioner Cover mould design and manufacturing. We provide a comprehensive service, specializing in the production of high-quality and high-precision air conditioner Cover moulds. We have also assisted numerous customers in customizing various types of plastic air conditioner Cover moulding lines.

We can also offer comprehensive assistance in the management of your production process. The procurement department will purchase high-quality raw materials, while the technical department will select the appropriate plastic formula. In accordance with the parameters of the plastic air conditioner Cover mould life requirements and market positioning, we will select the most suitable plastic air conditioner Cover parameters, structure, etc. Our extensive production capacity allows us to deliver plastic air conditioner Covers promptly, at competitive prices and with guaranteed quality.