Huanren Lab

 Project Introduction

Drop tests are divided into packaging drops and bare metal drops. Packaging falls mainly consider the ability of the product to resist accidental falls under transportation and storage conditions; bare metal falls mainly consider the ability of the product to resist accidental falls during normal use. Packaging drops can also reflect the packaging's ability to protect the product when it is subjected to vertical drops.

The drop height, number of drops and direction of drop reflect the test rigor. The drop methods and drop height requirements for different international standards for different products are different. For handheld products (such as mobile phones, MP3s, etc.), most drop heights range from 100cm to 150cm. For handheld products with ≦2kg, IEC recommends that the drop height of 100cm should not be damaged. For MIL, it recommends that the drop height is 122cm. For handheld products (such as mobile phones), it recommends that the drop height is 150cm.

According to the reference standards, the drop surface is a smooth, hard rigid surface made of concrete or steel, or if necessary, other grounds, such as marble floors, etc.

Package drop test

Packaging drop tests generally require that the drop method is to freely fall on one corner, three sides and six sides.

Angle drop: After falling, the test angle impacts the contact plane;

Side drop: tilt the bottom surface of the sample to a horizontal angle of 20°, then raise it to the test height and then fall, and its side impacts the contact plane;

Surface drop: The test sample needs to directly impact the contact plane after it falls.

Packaging drop determines whether the strength of the outer box or inner box and the firmness of the product packaging meets the quality requirements.

Bare Metal Drop Test

Purpose of bare metal drop test

The bare metal drop test is to detect the ability of the product to resist throwing and falling during use. The method of releasing the test sample should allow the test sample to fall freely from the suspended position, and minimize interference when released.

· ASTM standard testing instrument requirements: The throwing ground must be covered with 3.0mm (1/8in) thick rubber floor, at least 64mm (2.5in) thick concrete, and the area must be no less than 3㎡.

· EN71 standard test instrument requirements: The throwing ground is covered with 4mm thick steel plates, the surface of the steel plate should be coated with a 2mm thick cover layer with a Shore hardness of 75±5A, and placed on a non-flexible horizontal surface.

· GB6675 standard test instrument requirements: The impact surface should be composed of vinyl polymer sheets with a rated thickness of about 3mm. The vinyl polymer sheets are attached to concrete with a thickness of at least 64mm, and the cover surface should reach 10 degrees of Shore hardness A80 degrees and an area of ​​at least 0.3㎡.

Methods and standards

GB/T2423.8 "Environmental Testing of Electrical and Electronic Products Part 2: Test Methods Test Ed: Free Falling".

IEC60068-2-32 "Free Fall Test Method".

GB-T4857.5 Packaging and transport packaging parts drop test method.

ASTM D 5276-98(2009)