The most common screen frames used in screen printing are aluminum frame, followed by wooden frame and steel frame. The main physical performance indicators of these network frames are as follows:
①Elastic coefficient, the unit is Newton / cm. The elastic coefficient of wood material is 0.112 × 10 7th Newton / cm, the aluminum material is 0.75 × 10 7th Newton / cm, the elastic coefficient of steel material is 2.1 × 10 7th Newton / cm.
② Moment of inertia, the unit is expressed by the fourth power of centimeters. When the cross-sectional shape of the mesh frame material is hollow and rectangular (the outer frame size is 5 × 4 cm, the wall thickness is 2.5 mm), the moment of inertia of the aluminum material and the steel material is 15.088 cm, the cross section of the wooden mesh frame When the shape is a solid rectangle (5 × 4 cm), the moment of inertia is 41.667 cm to the fourth power.
â‘¢ Density, expressed in grams per cubic centimeter. The density of wood is 0.9 g / cm3, the density of steel is 7.8 g / cm3, and the density of aluminum is 2.7 g / cm3.
④Coefficient of thermal expansion (10 to the fifth power / ℃). The thermal expansion coefficient of aluminum materials is 2.410 to the fifth power / ℃, the thermal expansion coefficient of steel materials is 1.2 to the fifth power / ℃, and the thermal expansion coefficient of wood materials is 3.0 to the fifth power / ℃.
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