LBT-HW-311A Mask Impact Resistance Tester
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Description
Product Introduction:
Manufactured in accordance with XF44-2015, QB/T2506, and GA294, this equipment is primarily used to test the impact‑resistance performance of various eyeglass lenses, sunglasses, goggles, protective face shields, helmet visors, and similar products. It is widely employed by manufacturers, research institutions, and quality‑inspection and testing agencies.
Product Features:
1. The system is fully controlled via a PLC‑based touch screen, with all operations performed through the interface. The lifting mechanism employs a dual‑control configuration: automatic operation via the PLC touch screen and manual operation via a remote control handle. Lifting via the touch screen is automatic, while lifting via the handle is jog‑type.
2. The PLC control card features four high-precision 32-bit A/D conversion channels, complies with the PCI bus standard, and supports automatic detection and installation, enabling “plug-and-measure” functionality.
3. The PLC touch screen features a built-in impact‑energy acquisition and calculation module, which can acquire and compute impact data and display it on the screen.
4. The positioning bracket of the impactor is designed with a vertical lifting mechanism to ensure it remains precisely at the center of the sample at all times. Additionally, the impactor can be translated horizontally, allowing for easy adjustment to accommodate test samples of varying sizes.
5. The test height is measured using a 360P encoder, which generates pulse signals in real time as the lifting height changes. These pulses are fed into the PLC touch screen via an HSC high-speed counter, and the touch screen processes and displays the test height in real time.
6. The test height can be set independently via the PLC touch screen, and the system will automatically stop raising or lowering once the set height is reached.
7. The lifting mechanism employs an electric motor coupled with a precision ball screw, while the drive system utilizes an arc-tooth synchronous belt. This configuration ensures backlash-free operation in both directions, smooth transmission, and stable torque. It is equipped with protection features against overcurrent, overvoltage, and overload, and offers a speed‑control ratio of up to 1:10,000.
8. The headform can be mounted horizontally or vertically according to the specific testing requirements, and its support bracket is adjustable in two dimensions, facilitating distance adjustments for helmets of various sizes. 4. The headform support bracket is movable, enabling easy adjustment of the distance for helmets of different sizes.
9. It employs a non‑magnetic‑leakage control method, enabling instantaneous release of the impactor for free‑fall impact.
10. A one-piece molded protective panel structure with a height of 1 meter, featuring an internal cushioning layer.
11. Optionally equipped with specialized head molds of various sizes, facilitating testing of samples of different dimensions.
Applicable Standard:
XF44 (GA44) “Firefighter Helmet”
QB/T 2506 “Eyeglass Lenses — Optical Resin Lenses”
GA294 "Police Explosive-Resistant Helmet"
Technical Specifications:
| Parameter Name | Parameter value |
| Headform bracket travel distance | 30 mm left and right, 20 mm front and back |
| Impactor Specifications | The impactors used in different standards vary; typically, they are categorized into steel balls and drop hammers. 1. The fire helmet visor, self‑priming particulate‑filtering respirator, and protective mask eyepiece are tested using a steel ball with a diameter of 22 mm and a mass of approximately 45 g. 2. The optical resin lenses use a steel ball with a diameter of 16 mm and a weight of 16 g. 3. The police‑grade explosion‑proof helmet is subjected to an impact test using a hemispherical striker with an overall cylindrical shape, measuring φ45 ± 1 mm and weighing 1000 ± 10 g, made of T10A tool steel. |
| Impact height | 0–1500 mm, with touch-screen programmability and automatic lifting and lowering. 1. The height of the fire helmet visor and protective face shield glasses is 1300 mm ± 10 mm. 2. For optical resin lenses, the value is 1270–1300 mm. 3. The police explosion-proof helmet measures 500 ± 5 mm. |
| Headform specifications | It is available in three sizes—large, medium, and small—and is made of aluminum‑magnesium alloy. It features a full‑head design with simulated neck and chin components, and weighs 4 kg, 5 kg, or 6 kg, complying with the relevant requirements of GB/T 10000 and GB/T 2428. The police‑grade explosion‑proof helmet is equipped with a simulated rubber nose (optional headform). |
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