used hydraulic press

Types of used hydraulic presses

A used hydraulic press is a second-hand machine that provides heavy-duty pressing power for various industries. Regardless of its prior ownership, a hydraulic press's functionality and operating principles remain the same. These machines are designed to use fluid power for pressing, crushing, and molding various materials.

There are two categories of hydraulic presses, based on the type of cylinder and the application they are used for. For example, in terms of the type of cylinder, a used hydraulic pressing machine will either have an open-front or a closed-front design. Open-front used hydraulic presses have an easily accessible area from the front to load and position workpieces. Operators will find it easier to set up and adjust the position of workpieces. On the other hand, closed-front hydraulic presses have a frame that fully encloses the pressing area. It offers greater control over the applied pressure and more significant protection over the workpiece and moving parts.

Based on function, some popular types of used hydraulic presses include:

• Production hydraulic press

  A production hydraulic press machine is primarily designed for manufacturing applications. Buyers usually find it used for the mass production of parts in automotive, aerospace, construction, packaging, furniture, and electronics industries, among others. In such cases, the press is used for bonding, molding, and stamping to create complex shapes and structural components.

• Rubber vulcanizing press machine

  Used hydraulic rubber presses perform the same tasks as their brand-new counterparts. They are still essential to the production of rubber goods. Depending on the manufacturer and model, used rubber hydraulic presses may feature different specifications to accommodate various production needs.

  Generally, rubber presses are pressing machines that apply heat and pressure to mold heated raw material into any desired shape. That is how manufacturers create rubber products like seals, gaskets, and tires.

• Sheet metal hydraulic press

  A sheet metal hydraulic press applies pressure to form, bend, and stretch metal sheets into precise shapes and components. They are an essential part of the sheet metal fabrication industry. Operators can control their force and pressure to prevent damage and distortion on the sheet metal. Standard features on hydraulic presses designed for sheet metal include quick return mechanism, scraping plate, and adjustable pressing speed, to mention but a few.

• Stamping hydraulic press

  A stamping press can be automated to achieve higher production rates. Besides molding rubber and plastic materials, pressing machines are commonly used for stamping operations. The hydraulic motor provides sufficient force to cut, shape, and form a variety of metals into desired shapes.

Specifications & Maintenance

• Force Capacity

  Used hydraulic presses come in a variety of force capacities, ranging from a few tons to several thousand tons. Common force capacities include 10 tons, 20 tons, 50 tons, 100 tons, 200 tons, 500 tons, and up to 1,000 tons or more. Larger capacities allow for pressing heavier objects or applying greater forces.

• Cylinders

  The number of hydraulic cylinders in a press affects its force distribution and control. Most used hydraulic presses have one central cylinder. However, some larger models have two cylinders, one on each side, for improved balance and precision. The cylinders can also be different sizes. Larger cylinders generate more force. Common cylinder sizes include widths of 6", 8", and 10".

• Pressing speeds

  The speed at which a hydraulic press moves its ram determines how quickly it can complete pressing tasks. Usual pressing speeds range from 2 to 20 mm per second. Higher speeds increase productivity but may sacrifice control and precision. Some hydraulic presses allow operators to choose a pressing speed depending on the application. The optimal speed for pressing, crushing, or squeezing varies for different materials and objects. Slower speeds provide more control, while faster speeds enhance efficiency.

• Payload Capacity

  A used hydraulic press has a maximum weight it can safely press, known as the payload capacity. Presses with higher payload capacities are suitable for handling heavier objects, larger volumes, and more demanding applications. Common payload capacities include 5 tons, 10 tons, 20 tons, up to 50 tons, and higher. For example, a 50 ton hydraulic press machine can press objects weighing up to 50,000 pounds. It is crucial to select a hydraulic press with a payload rating that matches the intended use to prevent overloading and ensure safety.

• Machine Dimensions

  The physical size of a hydraulic press affects its work area, pressing force, and ability to fit within a production line. Common dimensions for height, width, and depth are as follows:

  - Floor press: 5' x 3' x 5' (H x W x D)

  - Benchtop press: 3' x 2' x 3'

  - Upright press: 7' x 5' x 5'

  - Shop press: 6' x 4' x 5'

  Upright and floor presses tend to be larger because their pressing plates must fit entire objects like car frames or axles. Bench top hydraulic presses are the smallest and can fit on workbenches. Shop presses are frequently seen in stores as stand-alone machinery.

Used hydraulic press machines require careful maintenance and inspections on a regular basis to make sure they work smoothly, safely, and reliably over time. The hydraulic oil needs to be topped up, pumped out, and replaced every two years or after 8,000 hours of operation. The oil filter must be replaced annually or after every 4,000 hours of operation. In addition, all seals and gaskets should be inspected for wear or leaks and replaced if necessary. Moreover, all rams, chains, and rollers should be lubricated with oil or grease to reduce friction and prevent damage. The air filter should be cleaned or replaced every month, while safety devices and emergency buttons must be tested to ensure they are in working condition. Further, loose bolts, nuts, and other fasteners should be checked and tightened if necessary. Finally, signs of rust or corrosion on any metal parts should be addressed by cleaning and applying protective coatings.

Scenarios of used hydraulic presses

• Industrial manufacturing

  Used hydraulic presses are widely employed in manufacturing and production lines for various industries, including automotive, aerospace, electronics, and more. They are used for metal stamping, deep drawing, plastic molding, assembly, and other processes.

• Repair and maintenance

  Used hydraulic presses are also useful in repair and maintenance technicians and workshops. They can assist in repairs, assembly, disassembly, straightening, and more for vehicles, machinery, and other equipment.

• Metalworking and carpentry

  In metalworking and carpentry workshops, used hydraulic presses can help bend, shear, punch, and emboss metals and assist in joining and laminating wood materials.

• Jewelry-making and art creation

  Jewelry-making studios and art creation centers can use small-sized used hydraulic presses for tasks like metal engraving, embossing, and forming, creating unique jewelry pieces and artworks.

How to choose used hydraulic presses

Many manufacturers have varying uses for the hydraulic press machine. Nonetheless, there are certain characteristics that most businesses look for when purchasing used hydraulic presses for sale.

• Functional features

  Business buyers will want to know the functions a used hydraulic press performs, as well as its capacity and dimensions. Working with a used hydraulic press with the right capacity and functional features for a specific application can help businesses reduce costs and improve productivity.

• Condition and resale value

  A factor that influences the purchase of used hydraulic presses is their overall condition. Business buyers will want to know how much longer a used hydraulic press can function at full capacity and efficiency. They will want to know the parts that are likely to wear out soon, such as hoses and seals. The resale value is determined by the condition of the machine.

• Brand and model

  A brand and model known for its reliability and long-lasting machines will have a greater likelihood of resale. Also, the availability of parts will make it easier to service the machine if it breaks down and needs repairs.

• Compression rate and energy costs

  The compression rate of the hydraulic presses used for aluminum or other metals is an important aspect that business buyers will look at when purchasing. Also, the energy cost to run the machine will be a vital factor to consider. Some older models of hydraulic presses consume more energy compared to newer ones.

• Technical documentation

  Technical documentation on the used hydraulic press provides important data and specifications to help compare different machines. Additionally, technical documents provide information about the maintenance history. This information helps businesses understand the condition of the machine.

• Warranty and after-sales service

  Used hydraulic presses are covered by a warranty when purchased through a reputable seller. The seller will provide after-sales service to ensure the machine is running well after purchase. Knowing that a machine is supported by solid after-sales service can give buyers peace of mind in their choice.

FAQ

Q1: What are the potential risks of buying a used hydraulic press machine?

A1: There are numerous dangers related to purchasing a used hydraulic press. To begin with, used hydraulic presses for sale might not be in excellent condition, which raises the possibility of accidents. Additionally, the vendor might not provide any maintenance history, making it difficult to evaluate the machine's reliability. Furthermore, without the manufacturer's original documentation, it could be challenging to obtain replacement parts for any necessary repairs.

Q2: What are some benefits of buying a second hand hydraulic press machine?

A2: Buying a second-hand hydraulic press machine can be economical for people on a budget but still needs to invest in quality. A used machine is significantly cheaper than a brand new one. One can also find an older model that is no longer in production. Additionally, purchasing a used machine is more environmentally friendly, as it reduces waste and promotes recycling.

Q3: When were hydraulic presses invented?

A3: Joseph Bramah created the first hydraulic press machine in 1795. Over the years, its design and function have significantly evolved to make it what it is now.

Q4: What factors to consider when buying a used hydraulic press?

A4: Several factors should be considered before purchasing a second-hand hydraulic machine. They include the machine's condition, the seller's reputation, and the availability of maintenance and repair services.

Q5: What are the benefits of hydraulic presses?

A5: The benefits of hydraulic presses are numerous. They are versatile, reliable, and can be used for various applications, including crushing, stamping, forging, straightening and many others. They are also energy efficient and can be easily integrated into automated production lines. Furthermore, hydraulic presses provide accurate control of force and speed, ensuring consistent and high-quality results.