Computer controlled memory impact testing machine，bench-top Computer controlled memory impact testing machine
Computer controlled memory impact testing machine is mainly used for hard plastics, reinforced nylon, glass steel, ceramics, cast stone, electrical insulation materials and other non-metallic materials impact toughness determination. The testing machine is an ideal test equipment for chemical industry, scientific research units, colleges and universities, quality testing departments, professional manufacturers laboratories and other units. It is a testing instrument with simple structure, convenient operation and accurate and reliable data.
Computer controlled memory impact testing machine is mainly used for hard plastics, reinforced nylon, glass steel, ceramics, cast stone, electrical insulation materials and other non-metallic materials impact toughness determination. The testing machine is an ideal test equipment for chemical industry, scientific research units, colleges and universities, quality testing departments, professional manufacturers laboratories and other units. It is a testing instrument with simple structure, convenient operation and accurate and reliable data.
Application
Tapered twin-screw extruders are primarily used for direct forming of pipes, sheets, and profiles from materials such as rigid polyvinyl chloride (UPVC), while also serving as plastic modifiers and pelletizers for powder materials. With different molds, they can directly extrude sheets, pipes, and profiles for experimental purposes.
Standards
JB/T 11343-2013：Martindale Abrasion and Pilling Tester
JB/T 5420-2014：Fabric Abrasion Tester
JB/T 6492-2014：Fabric Pilling Tester
JB/T 6491-2015：Fabric Snagging Tester
T/GDPIA 21-2020：Test Method for Abrasion and Pilling Resistance of Textiles (Martindale Method)
T/GDPIA 16-2020：Test Method for Fabric Pilling Resistance
T/GDPIA 22-2020：Test Method for Fabric Snagging Resistance
T/ZZB 1351-2019：Specification for Fabric Abrasion and Pilling Tester
T/CPMIA 0201-2022：Test Method for Abrasion Resistance of Textile Materials (Martindale Method)
Features
Screw Structure and Motion:
Conical Design: The feed section features a larger diameter, while the homogenizing section has a smaller diameter, creating a forced thrust to prevent material overheating.
Counter-Rotation: Two screws mesh in opposite directions, conveying material axially through the screw gap while applying shear force. Ideal for processing plastics like PVC and polyolefins.
Plasticizing and Extrusion Process:
Heating and Cooling: Built-in cast aluminum heaters and cooling fans within the barrel, combined with gradient temperature control technology, precisely regulate the processing temperature range.
Vacuum Degassing: Ensures uniform plasticization and minimizes bubbles and impurities through a vacuum degassing system.
Energy Efficiency and Environmental Protection:
Variable Frequency Drive: Compatible with VFD motors for energy-saving operation.
Waste Heat Recovery: Selected upgraded models incorporate waste heat recovery systems to further enhance energy efficiency.
Technical Parameters
| Category | Specification |
|---|---|
| Impact Energy | 2/4 J (simply supported beam); 2.75/5.5 J (cantilever) |
| Sampling Rate | 10 µs |
| Resolution | 16 bits |
| Load Measurement Accuracy | ≤ 1% |
| Impact Knife Angle | 30° |
| Pendulum Torque (Simply Supported Beam) | 2.1436 Nm, 1.0718 Nm, 0.5359 Nm |
| Pendulum Torque (Cantilever Beam) | 2.9474 Nm, 1.4737 Nm |
| Pendulum Pre-lift Angle | 150° |
| Simply Supported Beam | |
| Impact Speed | 2.9 m/s |
| Distance from Pendulum Shaft Center to Sample Center | 230 mm |
| Blade Angle | 30° |
| Blade Radius | 2 mm |
| Support Corner Radius | 1 mm |
| Support Front Angle | 5° |
| Support Rear Angle | 10° |
| Support Span | 40. 60. 70 mm |
| Sample Type and Size (L × W × T) | 380×10×4 mm, 50×6×4 mm, 120×15×10 mm |
| Cantilever Beam | |
| Impact Speed | 3.5 m/s |
| Distance from Pendulum Shaft Center to Sample Center | 335 mm |
| Blade Angle | 75° |
| Blade Radius | 0.8 mm |
| Front Edge Angle | 5° |
| Blade Back Angle | 10° |
| Sample Type and Size (L × W × T) | 80×10×4 mm63.5 × 12.7 × 12.7 mm63.5 × 12.7 × 6.4 mm63.5 × 12.7 × 3.2 mm |
Pre-Operation Checks
Equipment Status: Inspect switches and instrument functions; verify protective devices are intact.
Personal Protection: Wear earplugs, safety goggles, gloves, etc.
Material Preparation: Clean the storage bin; fill with material after confirming no impurities.
Equipment Installation and Commissioning
Secure Installation: Ensure equipment is firmly fixed to prevent displacement.
Electrical Connections: Inspect wiring and address any anomalies.
No-Load Test Run (for new equipment or after major overhaul):
Start the lubricating oil pump and inspect the lubrication system.
Start the main motor at low speed and check current, voltage, and transmission system.
Gradually increase rotational speed while observing noise changes.
Activate the feeding system and inspect the feed screw.
Start the vacuum pump and inspect the vacuum system.
Measure the heating section temperature; deviation from the instrument reading must not exceed 3°C.
Shut off the heating power supply and activate the cooling system.
Test the emergency stop button.
Startup Operation
Preheat: Power on and heat to the specified temperature, then maintain for 20 minutes.
Manual Rotation: Manually rotate the screw in the specified direction to confirm no abnormalities.
Check Rotation Direction: Facing the discharge head, clockwise rotation indicates right-hand screw.
Start Main Unit: Synchronously activate the power supply, gradually adjust the speed, and progressively increase it.
Feeding: Closely monitor the amperage meter and indicator gauge; torque must not exceed 65%-75% of the main motor's power rating.
Operational Monitoring
Vacuum Degassing: After the main unit stabilizes, start the vacuum pump, adjust water flow, and observe material plasticization status.
Temperature Control: Use the intelligent temperature controller to maintain minimal temperature fluctuations.
Fault Handling: Regularly inspect overload protection and fault alarm systems.
Operation Conclusion
Power Off: Turn off the equipment power after operation concludes.
Cleaning and Maintenance: Implement safety precautions and perform regular maintenance.
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