Plastic Pendulum Impact Testing Machine

The LI Series Plastic Pendulum Impact Testing Machine is designed for ISO and ASTM Charpy and Izod impact testing of plastics, nylon, hard rubber, FRP, and electrical insulating materials. It combines stable mechanical performance, clear test data, convenient operation, and reliable safety protection for laboratory and production quality control.

Overview

The LI Series Plastic Pendulum Impact Testing Machine is used to evaluate the impact resistance and energy absorption performance of non-metallic materials under dynamic loading. It is suitable for plastics, nylon, hard rubber, fiberglass reinforced plastic, electrical insulating materials, and other rigid or semi-rigid non-metallic specimens used in product development, incoming inspection, production quality control, and research applications.

The system supports both Charpy pendulum impact testing and Izod pendulum impact testing according to commonly used ISO and ASTM methods. After specimen impact, the machine can automatically display key results such as absorbed impact energy, impact strength, and pendulum swing angle. With convenient fixture replacement, quick hammer change, touch-screen operation, and RS232 connectivity for PC or printer output, the LI Series helps laboratories complete repetitive impact tests efficiently and consistently.

Features

Rigid Cast-Iron Frame
• The integrated cast-iron machine frame provides high rigidity and a stable base structure, helping absorb vibration generated during impact and supporting repeatable test results. Precision machining of the frame reduces assembly error and improves measurement consistency.
Accurate Pendulum and Angle Measurement
• The pendulum is designed with 3D modeling and dedicated analysis to control hammer moment and impact center position. A high-resolution shaftless encoder measures the pendulum impact angle precisely while helping reduce energy loss.
ISO and ASTM Charpy/Izod Capability
• The system supports both Charpy and Izod impact configurations for ISO and ASTM test methods. Specimen supports and clamps can be changed quickly, making the machine suitable for international laboratory workflows.
Efficient Operation and Data Output
• A touch-screen control interface guides test setup and displays absorbed impact energy, impact strength, pendulum angle, and other key data clearly. RS232 communication allows connection to a PC or printer for report output.
Enhanced Safety Protection
• A fully enclosed safety guard with transparent double-opening protective doors helps prevent unintended access to the test area. The low-wear disc brake provides efficient pendulum braking, improving both operating safety and testing efficiency.

Application

Plastics and Polymer Materials
• Impact resistance testing of rigid plastics, engineering plastics, and molded plastic specimens.
Nylon and Hard Rubber
• Evaluation of material toughness and absorbed impact energy under dynamic loading.
FRP and Insulating Materials
• Impact performance testing of fiberglass reinforced plastic and electrical insulation materials.
Quality Control Laboratories
• Routine batch testing, incoming inspection, and verification of material consistency.
Research and Education
• Material comparison, formulation development, standard test training, and academic research.

Technical Specifications:

Model LI2550 LI2251 LI2501
1 Equipment Type Plastic Pendulum Impact Testing Machine Plastic Pendulum Impact Testing Machine Plastic Pendulum Impact Testing Machine
2 Maximum Charpy Impact Energy, ISO 5 J 25 J 50 J
3 Maximum Charpy Impact Energy, ASTM 5.4 J 21.6 J 21.6 J
4 Maximum Izod Impact Energy, ISO / ASTM 5.5 J 22 J 22 J
5 Angle Resolution 0.045° 0.045° 0.045°
6 Main Unit Dimensions with Safety Guard, W × H × D Approx. 920 × 1020 × 500 mm Approx. 1160 × 1210 × 520 mm Approx. 1160 × 1210 × 520 mm
7 Machine Weight with Safety Guard Approx. 170 kg Approx. 230 kg Approx. 320 kg
8 Electrical Supply Single-phase 100–240 V, 50 Hz, 0.1 kW Single-phase 100–240 V, 50 Hz, 0.1 kW Single-phase 100–240 V, 50 Hz, 0.1 kW
9 Ambient Temperature 10–35 °C 10–35 °C 10–35 °C
10 Operating Environment No corrosive medium, vibration, or strong electromagnetic interference No corrosive medium, vibration, or strong electromagnetic interference No corrosive medium, vibration, or strong electromagnetic interference

Charpy Impact Test Parameters:

Parameter Charpy ISO — LI2550 Charpy ISO — LI2251 / LI2501 Charpy ASTM — All Models
1 Impact Speed 2.9 m/s 2.9 m/s (5 J), 3.8 m/s (>5 J) 3.46 m/s
2 Release Angle 107° 107° (5 J), 148° (>5 J) 148°
3 Distance from Pendulum Axis to Specimen Center 330 mm 330 mm (5 J), 398 mm (>5 J) 330 mm
4 Striker Angle 30° 30° 45°
5 Striker Radius 2 mm 2 mm 3.17 mm
6 Support Radius 1 mm 1 mm 3.17 mm
7 Support Span 62 mm 62 mm 101.6 mm
8 Specimen Size, L × W × T 80 × 10 × 4 mm 80 × 10 × 4 mm 127 × 12.7 × 3.17 mm; 127 × 12.7 × 6.35 mm; 127 × 12.7 × 12.7 mm

Izod Impact Test Parameters:

Parameter Izod ISO Izod ASTM
1 Impact Speed 3.5 m/s 3.5 m/s
2 Release Angle 148° 148°
3 Distance from Pendulum Axis to Specimen Center 330 mm 330 mm
4 Blade Radius 0.8 mm 0.8 mm
5 Distance from Blade Center to Upper Surface of Clamp 22 ± 0.2 mm 22 ± 0.05 mm
6 Specimen Size, L × W × T 80 × 10 × 4 mm 63.5 × 12.7 × 12.7 mm; 63.5 × 12.7 × 6.4 mm; 63.5 × 12.7 × 3.2 mm

Optional Accessories:

Category LI2550 LI2251 LI2501
1 Charpy Pendulums, ISO 1 J, 2 J, 4 J, 5 J 5 J, 7.5 J, 15 J, 25 J 5 J, 7.5 J, 15 J, 25 J, 50 J
2 Charpy Pendulums, ASTM 1 J, 2.7 J, 5.4 J 5.4 J, 10.8 J, 21.6 J 5.4 J, 10.8 J, 21.6 J
3 Izod Pendulums 1 J, 2.75 J, 5.5 J 5.5 J, 11 J, 22 J 5.5 J, 11 J, 22 J
4 Charpy Support Set Specimen centering device and span alignment block; clamp sets for ISO, ASTM, or combined ISO & ASTM configuration Specimen centering device and span alignment block; clamp sets for ISO, ASTM, or combined ISO & ASTM configuration Specimen centering device and span alignment block; clamp sets for ISO, ASTM, or combined ISO & ASTM configuration
5 Izod Support Set Centering device; fixed clamps for ISO, ASTM, or combined ISO & ASTM configuration Centering device; fixed clamps for ISO, ASTM, or combined ISO & ASTM configuration Centering device; fixed clamps for ISO, ASTM, or combined ISO & ASTM configuration

Why Choose Us?

  • •  We provide 7×24 technical consultation, operator training, and timely software updates.

  • •  We offer remote monitoring of equipment status, enabling rapid diagnosis and resolution when abnormalities occur.

  • •  Keeping up with the latest development of widely adopted international standards from ASTM, ISO, etc. to ensureyour test results relevant and credible

  • •  Maximizing your lab investment returns with tailored solutions to your unique needs from cost effective hardware tosoftware customization

  • •  We treat everyone, be it clients, colleagues or partners, with honesty and sincerity.

  • •  Staying at the forefront of testing technologies that continuously improve test accuracy, repeatability, and eficiency


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