What is a glow wire combustion testing machine?
In today's industrial production and safety testing fields, the glow wire combustion testing machine is an important testing equipment used to evaluate the flame retardant properties and high temperature resistance properties of materials. This article will introduce in detail the definition, working principle, application fields and related technical parameters of the glow wire combustion testing machine to help readers fully understand this equipment.
1. Definition of glow wire combustion testing machine
Glow wire combustion testing machine is a testing equipment that simulates the burning behavior of materials under high temperature conditions. It evaluates the flame retardant performance of the material by heating a metal wire of a specific material (usually nickel-chromium alloy) to a preset temperature, then contacting the material to be tested, and observing the material's burning conditions, burning time, whether the drippings ignite the tissue paper laid underneath, and other indicators.
2. Working principle of glow wire combustion testing machine
The working principle of the glow wire combustion testing machine mainly includes the following steps:
| steps | Description |
|---|---|
| 1. Heating the glow wire | The wire is heated by electric current to a set temperature (usually 550°C to 960°C). |
| 2. Contact with the material being tested | The heated glow wire is contacted to the surface of the material at a specified pressure for a certain period of time (usually 30 seconds). |
| 3. Observe combustion behavior | Record whether the material burns, the duration of burning, whether dripping is produced, and whether the dripping ignites the tissue paper. |
| 4. Evaluation results | Determine whether the flame retardant grade of the material meets relevant standards based on test data. |
3. Application fields of glow wire combustion testing machine
Glow wire combustion testing machines are widely used in the following fields:
| field | Application scenarios |
|---|---|
| Electronic appliances | Test the flame retardant properties of plastic casings, circuit boards and other materials. |
| automobile manufacturing | Evaluate the fire safety of interior materials (e.g. seats, dashboards). |
| building materials | Test the high temperature resistance properties of insulation materials and decorative materials. |
| Aerospace | Verify that aircraft interior materials comply with flame retardant standards. |
4. Technical parameters of glow wire combustion testing machine
The following are the typical technical parameters of the glow wire combustion testing machine:
| parameters | Numeric range |
|---|---|
| temperature range | 550℃～960℃ |
| Glow wire diameter | 4mm (standard) |
| Heating time | ≤30 seconds (adjustable) |
| test pressure | 1.0N±0.2N |
| Supply voltage | AC 220V±10% |
5. Relevant standards for glow wire combustion testing machines
The test methods of the glow wire combustion tester follow a number of international and domestic standards, mainly including:
| Standard name | Scope of application |
|---|---|
| IEC 60695-2-10 | International Electrotechnical Commission standards, applicable to electronic and electrical products. |
| GB/T 5169.10 | Chinese national standard, equivalent to IEC 60695-2-10. |
| UL746A | Underwriters Laboratories Standard for testing of plastic materials. |
6. Summary
Glow wire combustion testing machine is a key equipment for evaluating the flame retardant properties of materials and is widely used in electronic appliances, automobile manufacturing, building materials and other fields. By simulating combustion behavior in high-temperature environments, it can provide important data support for product safety design. Understanding its working principles, technical parameters and related standards will help companies better select and use the equipment and ensure that products meet safety requirements.
随着工业安全标准的不断提高，灼热丝燃烧试验机的应用将更加广泛，其技术也将持续升级，为各行业的安全发展提供更强有力的保障。
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