Definition
Shuangji Drop Tester is a special testing equipment used to evaluate the resistance of product packaging or small structural parts when subjected to vertical drop impact. The "double Ji" in its name usually refers to the equipment adopting a double-sided wing-like structure or a double-column guide design to ensure the stability and verticality of the drop process. This equipment is widely used in packaging, electronics, consumer goods, industrial parts and other fields to simulate accidental drops that may occur during transportation, handling or use, and provide data support for improving product design and packaging solutions.
How it works:
The Shuangji drop testing machine is based on the principle of free fall, by fixing the test sample on a freeable clamping device, lifting it to a preset height and then releasing it, so that it falls freely along the vertical guide structure to the impact plane. The equipment is usually controlled by a motor or pneumatic system, and the height can be precisely set by a ruler or digital sensor. The acceleration, velocity change and sample state at the moment of impact are recorded or observed to analyze its impact resistance. The design of the guide structure ensures vertical accuracy of the drop, reducing the impact of lateral offset on test results.
Measurement method
The testing process is carried out in accordance with relevant standards (e.g., ASTM D5276, ISO 2248, etc.). The sample is first placed on a clamping device and the drop height is set according to the test requirements, which typically ranges from hundreds of millimeters to several meters. After release, the sample falls freely into a standard impact plane (usually a rigid flat surface). After testing, the sample can be checked for physical damage, functional status, or packaging integrity. Some devices have integrated sensors that measure impact acceleration, which is calculated as:
a = (v_f - v_i) / t
where a is the average acceleration, v_f is the post-impact velocity, v_i is the pre-impact velocity, and t is the impact time. Repeated tests are usually performed in different directions to simulate multi-angle drop scenarios.
Influencing factors
Test results are influenced by a variety of factors. The drop height is a parameter that directly determines the impact energy, and needs to be reasonably selected according to the weight of the product and the usage scenario. The weight and shape of the sample affect the air resistance and landing posture during the drop. The material and flatness of the impact plane can lead to differences in energy absorption, and standards usually specify the use of rigid planes. Deviations from the synchronization and perpendicularity of the release device may introduce test errors. Environmental conditions such as temperature and humidity can alter material properties, affecting test consistency.
Applications:
The Shuangji drop tester is mainly used in the packaging industry to evaluate the protective performance of packaging materials such as corrugated boxes and plastic containers. In the electronics industry, it is used to test the shell strength and internal structural stability of consumer electronic products such as mobile phones and tablets. The automotive parts sector can be used to check the impact resistance of components such as lamps and sensors. In addition, it is also commonly used in toys, household appliances, industrial instruments, and other fields to verify product reliability and ensure that it meets transportation and use requirements.
Key points of selection
The maximum weight and size of the test sample should be considered when selecting to ensure that the equipment clamping range and load-bearing capacity meet the requirements. The drop height range should cover the relevant standard requirements and have precise height adjustment and indication functions. The material and design of the guide structure affect the stability and vertical accuracy of long-term use. The degree of automation of the control system (e.g. programming tests, data logging) can be selected according to the frequency of testing and data requirements. Safety protection devices such as emergency braking, protective fences, etc. are necessary configurations. In addition, the equipment should comply with the requirements of international or industry standards to ensure the comparability and recognition of test results.