The refrigerator’s outer casing is not only a protective structure but also serves as an aesthetic element, insulator, and structural support. Its production requires high precision and strength, while also ensuring the efficiency of large-scale manufacturing. Typically, refrigerator casings are made of stainless steel or galvanized steel sheets. These materials exhibit good corrosion resistance and strength, but their forming process requires high-precision metal hydraulic presses to ensure material integrity and surface flatness.

Characteristics of Refrigerator Outer Casing Forming Process:

Metal refrigerator outer casings are typically large-sized, thin-sheet, deep-drawn parts, requiring high-performance equipment:

• Wrinkle prevention
• Tear prevention
• High forming consistency
• High surface quality requirements (no indentations, no orange peel effect)

Therefore, hydraulic presses are generally equipped with:

• Drawing cushion / blank holder system
• Multi-stage speed and pressure control
• Stable slow-speed drawing process

Common Structures of Refrigerator Outer Casing Forming Hydraulic Press

1. Four-Column Deep Drawing Hydraulic Press (Mainstream Solution)

Features:
Mature structure, high cost-effectiveness
Even force distribution, suitable for large sheet metal
Can be equipped with a hydraulic drawing cushion for independent control of blank holder force

Applicable Products:
Refrigerator door panels
Refrigerator side panels and top panels

Common Tonnage:
315 tons
400 tons
500 tons
630 tons

2. Frame-type Hydraulic Press (High-end Solution)

Features:
Excellent machine body rigidity and high forming accuracy
Suitable for deep drawing and high-consistency products
Better stability and longer mold life

Applicable Scenarios:
High-end refrigerator door panels
Large-volume, automated production lines

Core Technology Configuration of Refrigerator Outer Casing Pressing Machine

✔ Dual system of main cylinder + stretching cushion
Independently adjustable blank holder force effectively prevents wrinkling and cracking.
✔ Multi-stage speed control
Fast descent → slow pressing → pressure holding → fast return, improving efficiency and quality.
✔ Servo hydraulic system (optional)
Saves 20%-40% energy, low noise, and fast response.
✔ PLC + touchscreen control
Process parameters are stored as recipes for quick changeovers.
✔ High-precision guiding structure
Ensures flatness and dimensional consistency of the door panel.

Technical Parameters of 250T Refrigerator Outer Casing Forming Press

Automation and Production Line Integration

The metal refrigerator casing forming hydraulic press can be integrated with the following equipment:

1. Uncoiling + Leveling + Feeding Line
2. Automatic loading and unloading by a robotic arm
3. In-mold trimming and punching device
4. Subsequent shaping/flanging hydraulic press

👉 Suitable for building a fully automated refrigerator casing forming production line

Selection Suggestions of Refrigerator Outer Casing Hydraulic Press (Customer-friendly)

• Conventional door panels / small to medium batch production: Four-column stretching hydraulic press
• Deep drawing / high-end door panels: Frame-type hydraulic press
• For energy saving and stability: Servo hydraulic system