Copper powder briquetting machines are key equipment in the powder metallurgy and metal recycling industries. They are used to press loose copper powder or copper shavings into high-density, regularly shaped blocks (cakes, bricks, cylinders, etc.) under high pressure, which facilitates transportation, storage and subsequent smelting.

The following is a comprehensive introduction to copper powder pressing machines:

I. Main Applications

Metal Recycling Industry: Compresses copper shavings, copper dust from machining, copper planks, and other waste materials into blocks, significantly reducing volume, improving furnace feeding efficiency, and minimizing burn-off and oxidation.

Powder Metallurgy Industry: Compresses electrolytic copper powder or other copper-based powders into preforms (green billets) for subsequent sintering, forging, or direct use as finished products.

Foundry Industry: Produces uniform copper blocks for feeding, ensuring a uniform smelting composition.

Storage and Transportation: Compressing loose powder into blocks saves approximately 70%-80% of storage space and eliminates spillage and contamination during transportation.

II. Working Principle

The core technology is high-pressure forming. A fixed amount of copper powder/shavings is fed into the mold cavity, and a huge pressure (usually tens to hundreds of megapascals) is applied by a hydraulically or mechanically driven main punch. This causes the particles to bind tightly together under plastic deformation and mechanical interlocking, forming a block with a certain strength and density.

III. Equipment Types

1. By Power Source

Hydraulic Briquetting Machine:

Features: Most commonly used, high pressure (up to hundreds of tons), stable operation, good pressure holding performance, infinitely adjustable pressure. Suitable for pressing blocks with high density requirements and complex shapes.

Applications: Medium to large-scale, high-density briquetting production; preferred choice for metal recycling plants.

Mechanical (Crank/Screw) Briquetting Machine:

Features: High speed, high efficiency, relatively low energy consumption, but pressure is usually lower than hydraulic machines, and adjustment is less flexible.

Applications: Large-volume, simple-shaped, medium-density standardized briquetting production.

Four-Column Hydraulic Briquetting Machine:

Features: Good structural rigidity, high guiding accuracy, stable operation, suitable for powder metallurgy forming with extremely high requirements.

Applications: Precision compaction in the powder metallurgy industry.

2. By Working Method

Vertical Briquetting Machine: Small footprint, easy mold replacement, but sometimes requires auxiliary equipment for feeding.

Horizontal Briquetting Machine: Convenient feeding, easy to automate production lines, suitable for continuous mass production.

IV. Core Structural Components

Main Frame: Load-bearing structure, ensuring rigidity.

Hydraulic System/Mechanical Transmission System: Power core, providing molding pressure.

Mold System:

Mold (Cavity): Determines the shape (round, square, hexagonal, etc.) and size of the briquettes.

Punches (Upper/Lower Punches): Directly apply pressure to the powder. Some models have multiple punches to achieve bidirectional pressing or complex actions.

Feeding System: Quantitatively feeds copper powder into the mold, ensuring consistent weight for each briquette.

Control System: PLC control, allowing setting of parameters such as pressure, holding time, and work cycle.

Discharge Device: Pushes the pressed briquettes out of the mold.

V. Key Performance Parameters

Nominal Pressure (tonns): Such as 100 tons, 315 tons, 500 tons, etc., determines the size of the briquettes that can be pressed and the density achieved.

Briquetting size: The finished product's external dimensions determined by the mold.

Productivity (briques/hour): Related to the equipment's automation level and cycle time.

Broque density: A key indicator; ideally, it should approach the solid density of pure copper (8.96 g/cm³), but in practice, it can reach 7.0-8.5 g/cm³ or higher.

Installed power: Reflects the equipment's energy consumption.

VI. Selection Considerations

Raw Material State: Is it fine powder, coarse particles, or long strips? Different materials require different feeding and pressing methods.

Output Requirements: Determines the automation level and tonnage of the equipment.

Bullet Density Requirements: High density requires a high-pressure hydraulic press.

Bullet Shape and Size: Determines mold design and equipment opening size.

Budget and Automation: Prices vary significantly from semi-automatic to fully automatic production lines.

Heating Required: For some difficult-to-form alloy powders, hot pressing may be necessary.

VII. Advantages and Benefits

Economic Benefits: Reduced transportation and storage costs; increased smelting speed and output; reduced metal loss (oxidation).

Environmental Benefits: Dust-free operation, improved working environment; reduced material waste.

Process Benefits: Uniform briquette composition and stable smelting quality.

Summary and Recommendations:

If you are a metal recycler processing copper scrap and shavings, with the primary goal of reducing volume and increasing density, you should choose a large-tonnage (e.g., 315 tons or more) hydraulic metal scrap briquetting machine, prioritizing high productivity and automation.

If you are a powder metallurgy manufacturer processing copper-based powders, with the primary goal of precision forming, you should choose a four-column hydraulic powder forming press with high control precision, a proportional hydraulic system, and precise pressure and position adjustment.

Before purchasing, it is strongly recommended to provide raw material samples to the equipment supplier for trial pressing to determine the optimal equipment model, pressure parameters, and mold design, and to verify that the briquettes meet quality standards.