Considering the service life of the mold and pushing down the push stroke, the compression ratio of the return spring is usually 30% to 40%, which results in the use of a light-loaded blue (TL series) spring when the type of the return spring is selected. The outer diameter of the spring is the main technical parameter of the spring specification. The value is usually affected by the size of the mold and the size of the mounting mandrel. The larger the size of the mold, the larger the outer diameter of the spring. The spring is mounted on the reset rod. To ensure effective installation, the inner diameter of the spring should be larger than the diameter of the reset rod. The diameter of the reset rod is Φ25mm, and the outer diameter of the spring is finally determined to be Φ50mm. At the same time, in order to ensure the smoothness during the movement, four springs are selected and mounted on the reset rod. The free length of the spring is one of the basic parameters selected for the spring size, and springs of the same outer diameter can have different free lengths. The free length of the spring is affected by the product's push-out stroke, at least greater than the push-out stroke of the push-out mechanism, otherwise the spring cannot work, so the compression of the return spring should be at least the sum of the push-out stroke and the pre-pressure. In order to ensure the effective use of the spring, the load must be within the limit. It can be checked by the following formula: nF ≥ 1.5F, where: F - single spring compression state load; n - spring root number; F subject - The load on the spring. As the return spring, the load is mainly derived from the dead weight of the retracting plate and the push plate. Transparent Roller Shutter Door
Material: polycarbonate (PC bulletproof plastic)
Using aluminum profiles for door connection piece, two-layer structure , special design ,embedded into the door sheet. Simple and elegant, strong resistance to stress.
The base is made of aluminum alloy, special design, corrosion-resistant simple and aesthetic.
Mute track is made of aluminum alloy, dual-slot design, the mute material can be embedded into the slot, and creating a quiet environment.
Control system : 24V DC , mute operation, safe and reliable , durable and long life . In the case of obstacles ,doors rebound or stop automatically stop during opening and closing process.
Door opening and closing process, lighting and delaying three minutes automatically ; users can switch to manual option when power failure, uninterruptible power supply . Please contact with our technical department for particular requirements.
Transparent Roller Shutter Door,Transparent Curtain Roller Shutter Door,Commercial Transparent Roller Shutter Door,Polycarbonate Transparent Roller Shutter Door Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.hfhighspeeddoor.com