2 Ml - 50 Ml Borosilicate Glass Tube Vials Liquid Or Power

2ml-50ml Glass Tube Vials Borosilicate Glass Liquid Or Power

Procuct

The purpose of eliminating permanent stresses in the glass article and structural imbalances. Glass is a poor conductor of heat. After molding, the inner surface layer and the temperature difference in the cooling process there. When the inner surface layer solidification thick, but there is the temperature difference stress relaxation. When the surface layer cooled to room temperature, this temperature difference will appear. Inner continued cooling shrinkage, tensile stress hampered by the surface, while the surface compressive stress, is permanent. Size and distribution of permanent stresses caused by thermal processing of the product portions are not uniform, and 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. During annealing, heat the glass product or keep it to the annealing temperature after thermoforming, so that the original stress is relaxed and eliminated, and then slowly cooled to below the strain temperature. After the glass has completely entered the state of rigid body, the temperature difference between the inner and outer layers only produces temporary stress . Because certain performance and functional glasses (such as optical glass, thermometer glass) are within the transition temperature range, the huge viscosity makes the structure particles move slowly, so that its performance cannot reach the equilibrium state consistent with the temperature, and it will balance slowly during use. Produce performance changes, therefore, it must be kept at the annealing temperature for sufficient time

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 a centrifuge tube expansion process, the rotational speed and diameter determined centrifugal force. When the diameter is constant, the higher the speed, the greater the centrifugal force. Under centrifugal force, the larger the diameter, the slower the speed. Thus, during the pipe expansion rate should be used as the basis to the diameter of the glass tube

2, the wall thickness is determined, and the corresponding temperature. Heating and softening the pressure in the pipe expansion process, the control diameter sizing device mainly depends on a set of synchronous rotation of the glass tube, it requires a wider range of speeds.

principle

The purpose is to eliminate permanent stress and structural imbalance in glass products. Glass is a poor heat conductor. After the product is formed, the temperature difference between the surface layer and the inner layer will occur during the cooling process. When the surface layer is solidified and the inner layer is viscous, there is a temperature difference, but there is no stress relaxation. When the surface layer cools to room temperature, this temperature difference will appear. The inner layer continues to cool and shrink, the surface layer prevents it from generating tensile stress, and the surface layer generates permanent compressive stress. Due to the uneven size and distribution of permanent stress generated by thermal process in each part of the product, it will affect the strength of glass products, and even break by itself due to stress concentration. Annealing can eliminate harmful tension inside the glass and prevent new stress.