A used aluminum scrap briquetting machine is a very practical piece of equipment in the metal recycling industry, especially in the aluminum processing and casting industries. Purchasing used equipment can significantly reduce initial investment costs, but extra attention needs to be paid to the condition and suitability of the equipment.

I. Function and Value of Aluminum Chip Compactor

Main Function: Compresses loose, fluffy aluminum chips generated by lathes, milling machines, and CNC machining centers into high-density cakes or blocks under high pressure.

Core Value:

Reduced Volume: Compression ratios can reach 1:5 or even higher, significantly reducing storage and transportation space and lowering logistics costs.

Increased Recycling Value: Compacted cakes experience less oxidation loss during smelting and have higher smelting efficiency, making them more attractive to recycling companies. The unit price is typically 15%-30% higher than loose aluminum chips.

Maintaining Cleanliness: Part of the cutting fluid can be discharged during the process, resulting in cleaner aluminum chips and reducing contamination during subsequent processing.

Easy Management: Neatly arranged cakes are easy to stack, count, and manage in the warehouse

II. Key Considerations for Purchasing a Used Aluminum Chip Press Machine (A Guide to Avoiding Pitfalls) 

When purchasing used equipment, the "inspection" stage is crucial. It is recommended to conduct this inspection with the assistance of a professional.

Conditions of Core Working Components:

Main Hydraulic Cylinder and Pump: This is the heart of the machine. Check for oil leaks and scratches or rust on the cylinder piston rod. Listen to the pump's operation; ensure it runs smoothly without abnormal noise.

Mold/Pressure Chamber: Check the wear on the inner wall. Excessive wear will affect the density of the pressed cakes and the smoothness of the cake output.

Hydraulic System: Inspect all valves, pipes, and joints. Is the hydraulic oil clean? If the oil is dark or contains impurities, it indicates potential internal wear.

Electrical Control System:Check the brand, condition (new or used), and cleanliness of the wiring of components in the control cabinet (such as PLC, contactors, and relays). Perform several no-load cycles to observe the accuracy and sensitivity of the operation.

Equipment Structure and Appearance:

Frame (Body): Inspect the main load-bearing structures (such as columns and beams) for obvious cracks, weld repair marks, or permanent deformation.

Brand and Year of Manufacture: Prioritize well-known brands (such as domestic brands like Zheng Shen, Qian Xu, and Wan Hong; imported brands like Japanese and German brands), as they offer better quality and durability. Inquire about the specific year of manufacture and service life.

Working Pressure and Cake Size: Confirm that the nominal pressure (unit: tons), cake size, and single-batch processing capacity meet your production requirements. Common sizes include 63 tons, 100 tons, 160 tons, and 315 tons.

Source and History:

Previous User Experience: Ideally, equipment should come from a factory with standardized usage and complete maintenance records (such as large automotive parts factories or die-casting plants). Avoid equipment from small workshops operating under harsh conditions and 24/7.

On-site Trial Run Available: This is a must! Request the seller to demonstrate the pressing process using real aluminum shavings (preferably similar to those in your factory), and observe the shaving formation, density, cycle time, and equipment operating status.

Accessories and fittings: Confirm whether necessary accessories are included, such as molds, hydraulic hoses, tools, etc. Inquire whether any wear parts (such as seals) need to be replaced.

III. Main Structure and Working Principle

Structural Composition:

Main Frame: High-strength steel plate welded or four-column structure to ensure stable pressure resistance.

Hydraulic System: Core power source, including oil pump, cylinders, valve blocks, and control system. Pressure typically ranges from tens to thousands of tons.

Mold/Box: A detachable container for holding scrap aluminum. The shape of the "aluminum cake" (round, square) after pressing is determined by the box.

Pushing/Discharging Device: Used to push the pressed aluminum cake out of the box.

Electrical Control System: Controls the pressing cycle, holding time, etc., with manual, semi-automatic, and fully automatic modes.

Work Process:

Feeding: Aluminum alloy chips or crushed material are poured into the box.

Pre-pressing: The press head descends for initial compression, expelling a large amount of air.

Main Pressing: High-pressure cylinders apply high pressure (usually high pressure, slow advance) to compress the material to an extremely dense state.

Holding pressure: Maintain pressure for several seconds to set the shape of the aluminum disc and reduce springback.

Discharging: The pressure head returns, the hopper moves out or the side door opens, and the ejector mechanism pushes out the formed aluminum disc.

Circulation: The equipment resets, preparing for the next cycle.

IV. Main Purchasing Channels

Used Equipment Dealers/Markets:

Advantages: Wide selection of goods; dealers usually perform basic refurbishment and testing, and offer short-term warranties.

Disadvantages: Prices may include middlemen's profits; careful verification of dealer credibility is necessary.

Locations: Large used equipment markets exist in Foshan and Dongguan (Guangdong), Suzhou and Wuxi (Jiangsu), and Ningbo (Zhejiang).

Direct Factory Transfer:

Advantages: Potentially more affordable prices; clearer understanding of equipment's usage history and environment.

Disadvantages: Limited information channels; requires industry connections or extensive searching.

Online Platforms:

Common Platforms: Alibaba (1688), Xianyu, Zhuanzhuan, industry B2B websites, and dedicated used equipment websites.

Advantages: Abundant information, easy to compare prices.

Risks: Difficult to verify information authenticity; risk of fraud. Never pay remotely without inspecting the goods!

Auctions/Asset Disposal:

Focus on asset auctions of closed factories or bankrupt companies; sometimes you can find equipment with extremely high cost-performance ratios.

V. Factors Affecting Price 

Second-hand prices vary greatly, ranging from tens of thousands to hundreds of thousands of RMB, mainly depending on:

Brand and Model: Imported brands are significantly more expensive than domestic brands; larger models are more expensive than smaller models.

Years of Use and Condition: The condition of core components is crucial.

Market Demand and Region.

Whether Refurbishment and Warranty Services are Included.

VI. Key Recommendations

Budget Reserve: In addition to the purchase price, be sure to reserve 10%-20% of the budget for possible maintenance, replacement of hydraulic oil and wear parts, and equipment transportation and installation costs.

Technical Matching: Clearly define the type of aluminum shavings you need to process (pure aluminum, aluminum alloy, or a mixture with a significant amount of iron filings?), and the average daily processing volume. Select a model with suitable pressure and processing capacity.

Contract Protection: Sign a clear purchase and sale contract with the seller, specifying the equipment model, main parameters, current condition description, payment method, delivery date, and try to secure a warranty period (even if it's only 1-3 months).

Safety First: After the equipment arrives at the factory, it should be installed and debugged by professional electricians and hydraulic technicians. Ensure that safety devices (such as emergency stop buttons and safety doors) are effective before putting it into use.

Summary: Buying a used aluminum shaving press machine is a "technical job." The core principle is "focus on condition, not age; always test the machine and thoroughly inspect it." Investing time in preliminary research and machine inspection to find a good condition used machine can bring considerable economic returns to your business. I wish you a successful purchase! If you could provide more specific requirements (such as approximate daily processing capacity and budget range), I might be able to offer more specific guidance.