SC-160-2R Yokohama Rubber Air Spring 1.8KG Weight Punch Air Shock Assembly

Punch rubber airbag, also commonly known as pneumatic punch buffer or polyurethane airbag, is a key auxiliary component installed on a mechanical press (punch press). It is mainly used to replace traditional metal springs or hydraulic buffers to provide cushioning, unloading and pressing functions for the mold.

GUOMAT Punch Air Spring Number: F-160-2

YOKOHAMA Air Spring Numbers: S-160-2, S 160 2, S1600, S-160-2R, S 160 2R, S1602R, SC-160-2R, SC 160 2R, SC1602R

Structure-Punch Air Spring

Material: Typically made of high-strength, wear-resistant, and oil-resistant polyurethane rubber (PU), with a high-strength cord ply embedded inside to withstand high pressures.

Shape: Common shapes include cylindrical, gourd-shaped, or tire-shaped, with a hollow, inflatable center.

Connections: Equipped with standard pneumatic quick-connect connectors for connecting to an air supply line.

Working Principle

Inflation: Compressed air at a certain pressure (typically 0.5 MPa - 0.9 MPa) is introduced from an air source (air compressor), causing the airbag to expand and reach its initial pressure and height.

Working Stroke: When the punch press slide drives the upper die downward, the die's hold-down plate or stripper plate compresses the airbag. As the airbag is compressed, the internal pressure increases, generating a constant, flexible upward rebound force.

Return reset: When the slider returns, the elastic energy stored in the airbag is released, pushing it back to its original shape, thereby reliably pushing the material or waste out of the mold (unloading) or bouncing the pressed workpiece.

Key Features and Advantages

Constant Spring Force: By adjusting the internal air pressure, the desired spring force can be precisely achieved at the same compression level. The force changes smoothly throughout the entire stroke, surpassing the linearly increasing force of metal springs.

Long Stroke: Compared to traditional springs, airbags offer a longer effective stroke, better adapting to the needs of various molds.

Soft Landing and Cushioning: The polyurethane material and the compressibility of air provide excellent cushioning and shock absorption, effectively reducing stamping vibration and noise, protecting molds and machine tools, and improving the working environment.

Flexible Installation and Space Saving: The compact size allows for flexible installation locations, allowing multiple units to be used in parallel for pressure balance, making them particularly suitable for molds with limited space.

High Adjustability: The spring force is adjusted solely by air pressure, eliminating the need for part replacement, making it a single unit for multiple uses and economical and convenient.

Long Life and Simple Maintenance: High-quality polyurethane material resists wear and aging, far exceeding the lifespan of metal springs. Failure rates are low; simply maintain a clean and dry air source.

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