1. What Is a Rubber Buffer Block?
A rubber buffer block (rubber bumper) is an energy-absorbing elastomeric component. It reduces impact force by converting kinetic energy into elastic deformation and internal damping within the rubber.
In simple terms:
It turns hard impacts into soft landings.
2. Core Functions
1) Impact Energy Absorption
- Reduces peak loads
- Protects equipment and structures
2) Vibration Isolation
- Minimizes vibration transmission
- Improves operational stability
3) Noise Reduction
- Prevents metal-to-metal impact noise
4) Travel Limitation & Protection
- Acts as end-stop buffers
- Prevents over-travel damage
3. Typical Applications
|
Industry |
Applications |
|
Industrial machinery |
Presses, injection molding machines |
|
Material handling |
Conveyors, lifts, stops |
|
Rail & transit |
Door systems, buffers |
|
Construction equipment |
Boom stops, supports |
|
Automotive |
Tailgate buffers, chassis stops |
|
Building systems |
Elevators, platforms |
4. Common Designs & Installation
- Shapes: Cylindrical, block, stepped, conical, custom
- Mounting: Bolted, bonded, press-fit, rail-mounted
5. Materials & Selection Guide
|
Material |
Characteristics |
Typical Use |
|
NR (Natural Rubber) |
High resilience, excellent energy absorption |
Frequent dynamic impact |
|
SBR |
Cost-effective |
General industrial |
|
EPDM |
Weather & aging resistant |
Outdoor equipment |
|
NBR |
Oil resistant |
Hydraulic & oily environments |
|
PU (Polyurethane) |
High load, abrasion resistant |
Heavy loads, limited space |
High energy absorption does not always mean high load capacity.
6. Key Performance Parameters
|
Parameter |
Engineering Meaning |
|
Hardness (Shore A) |
Buffer stiffness |
|
Compression stroke |
Energy absorption capacity |
|
Maximum load |
Prevents permanent deformation |
|
Fatigue life |
Repeated impact durability |
|
Temperature range |
Environmental suitability |
7. Common Failure Modes
|
Failure |
Cause |
|
Permanent set |
Overload or too soft compound |
|
Surface cracking |
Aging or poor weather resistance |
|
Poor buffering |
Excessive hardness |
|
Detachment |
Improper mounting |