Rubber Stopper Glass Tube Vials Rubber Stopper

Procuct

English glass is a non-metallic pipe. It is a sodium oxide (Na2O), boron oxide (of B2O3) and silicon dioxide (SiO2) glass as a base component. Its good performance has been recognized by the world community. Compared with ordinary glass, it has no toxic side effects. Mechanical properties, thermal stability, water, alkali, acid and other properties are greatly improved. It can be widely used in chemical, aerospace, defense, home, hospital, etc., with good promotional value and social benefits. This glass appeared in our country, is another new revolution in basic materials industry.

Quality assurance conditions include

Features

◆ GMP production environment

◆ Online statistical control

◆ meet ISO size and appearance AQL level

◆ detecting camera parameters and critical size defects in appearance key 77

◆ Each product can be traced to the time of delivery (DD-MM-YY), shift, machine and operator.

1. Rotation speed: In the process of centrifugal pipe expansion, the rotation speed and pipe diameter determine the centrifugal force. When the pipe diameter is certain, the higher the rotation, the greater the centrifugal force. Under the action of centrifugal force, the larger the pipe diameter, the slower the rotation speed. Therefore, the speed used in the pipe expansion process should be based on the diameter of the glass tube

2. The wall thickness and the corresponding temperature are determined. In the process of electrothermal softening and air-pressure pipe expansion, the control of pipe diameter mainly relies on a set of sizing devices that rotate synchronously with the glass tube, which has a wider range of speed requirements.

principle

The purpose is to eliminate permanent stress and structural imbalance in glass products. Glass is a poor thermal conductor. After the product is formed, the surface layer and the inner layer will have a temperature difference during the cooling process. When the surface layer is solidified and the inner layer is viscous, the temperature difference exists but the stress relaxation does not exist. This temperature difference occurs when the surface layer is cooled to room temperature. , The inner layer continues to cool down and shrinks, which is hindered by the surface layer to produce tensile stress, and at the same time, the surface layer produces compressive stress, which is permanent. The size and distribution of the permanent stress caused by the thermal process in each part of the product will not be uniform, therefore, it will affect the strength of the glass product, and even break by itself due to stress concentration. Annealing can eliminate harmful tension inside the glass and prevent new stress from being generated.