Introduction to Leather Punching Hydraulic Press

The leather punching hydraulic press is a large, high-precision industrial piece of equipment, mainly used for batch punching, perforating, and embossing processes on materials such as leather, synthetic leather, and fiberboard. Below, Jianlong Hydraulic Machinery will provide a brief analysis from three aspects: the core structure, key technical requirements, and main application areas.

1. Core Structure and Components

1.1 Machine Body: Typically adopts a four-column or frame structure.

◦ Four-column type: Relatively low cost, easy maintenance, and large open space; a common choice.

◦ Frame type: Good rigidity, high precision, and small deformation; suitable for applications requiring extremely high punching precision (such as precision automotive interior parts), but more expensive.

1.2 Hydraulic System: The heart of the machine.

◦ Cylinder: The main cylinder provides the main punching pressure and may be equipped with a quick-acting cylinder to increase the idle stroke speed.

◦ Pump Station: High-pressure, high-flow hydraulic pump, motor, oil tank, cooling system, etc. Stability during long-term continuous operation must be guaranteed.

◦ Valve Assembly: Precision directional valves, proportional valves, or servo valves used to control pressure, speed, and position.

1.3 Electrical Control System:

◦ PLC: The control core, responsible for automating the entire workflow (rapid descent, feed, pressure holding, pressure release, return).

◦ Human-Machine Interface (HMI): Touchscreen used for setting parameters (pressure, time, stroke), monitoring status, and fault diagnosis.

◦ Safety Devices: Two-hand operation buttons, emergency stop switch, light curtain or safety barrier, hydraulic locking device, etc., compliant with CE or other safety standards.

1.4 Worktable and Slider (Moving Beam):

◦ Worktable: Must be large enough (e.g., 1500mm x 1000mm or larger), with T-slots or drilled templates on the surface for fixing the lower die.

◦ Slider: Mounts the upper die, driven by a hydraulic cylinder. Its parallelism and the parallelism of its lower plane with the worktable are crucial, directly affecting punching uniformity and die life.

1.5 Die & Mold:

◦ Die-cutting die: Typically laser-cut or etched dies are used and fixed to the die-cutting plate. This is crucial for achieving specific patterns.

◦ Pad: An elastic cushioning material under the die, commonly made of PVC or high-polymer polyurethane, protecting the blade and ensuring a complete cut.

◦ Back pressure plate: Sometimes a back pressure ejection device is used for clearer punching.

2. Key Technical Requirements for Leather Punching

2.1 Precision and Parallelism: To ensure burr-free and non-layered punching, the parallelism error of the slider throughout its stroke must be controlled within 0.1mm/m.

2.2 Pressure Control: Multi-stage pressure setting function is required. Leather punching does not require full pressure throughout the entire stroke; precise pressure control is needed in the contact and punching sections to protect the die and accommodate materials of different thicknesses and hardnesses.

2.3 Stroke and Opening Height: The opening height (the distance between the slider at its highest point and the worktable) must be large enough to accommodate the die height and facilitate material loading and unloading. Typically, 800mm or more is required. 

2.4 Working Speed:

◦ Idle Speed: Fast descent and return speeds are essential for improved efficiency.

◦ Punching Speed: Adjustable feed speed to accommodate different materials.

2.5 Cushioning and Shock Absorption: The impact force during punching is significant; the hydraulic system requires a robust cushioning design, and the machine body must be stable to reduce noise and vibration.

2.6 Feeding and Waste Removal: For automated production lines, automatic feeding mechanisms (such as belts or suction cups) and automatic waste removal systems (air blowing or waste reeling devices) must be considered.

3. Main Application Areas

3.1 Footwear: Punching perforations and decorative parts for athletic shoes and leather shoes.

3.2 Automotive Interiors: Perforation (ventilation holes, decorative holes) for seat leather, steering wheel covers, and interior panels.

3.3 Furniture and Home Furnishings: Punching perforations and pattern punching for leather sofas, headboards, etc. 

3.4 Bags and Handbags: Decorative punching and component cutting for various leather and synthetic leather bags.

3.5 Apparel and Cultural & Creative Products: Hollow-out designs for specialty leather garments and craft production.

A leather punching hydraulic press is a heavy-duty professional machine. Its core function is to achieve high-efficiency, high-quality punching while ensuring high precision and stability. When purchasing, it is essential to move beyond simply looking at tonnage and place equal importance on precision, speed control, and compatibility with your processing needs. For more information/advice on leather punching hydraulic presses or to purchase other high-quality hydraulic presses, please contact us (or scan the WhatsApp QR code below). Jianlong Hydraulic Technology will provide you with personalized, customized professional solutions and is dedicated to serving you.