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LKT-009
LEVER
54025990
Lever team has many years experiences in metal fiber production and textile technologies. We have confidence to provide worldwide customers the product with best Cost/Performance rate and service.
Extremely fine steel fibres (12 µm diameter) are spun into yarns and then knitted into fabric, which is used, among other applications, as a mould cover in the formation of automotive glass. High requirements of the glass quality (absence of dioptric distortions) ask for a perfect evenness of the mould cover surface, which depends on the local distortions of the fabric created during tensioning of the fabric over the mould. In this paper, compression behaviour of steel knitted fabrics combined with the fabric deformation in biaxial tension and shear is studied. Interaction of the fabric with the formed glass depends on the local changes of the fabric compression behaviou due to local fabric deformations on the mould. The deformation of the fabric is further linked to quality of the glass using quantitative optical distortion system based on moiré patterns to measure glass dioptric distortions.
Brief Introduction
Design and production of automobiles with more intricate and fantasy shapes and appearance necessitate the usage of more sophisticated production methods for manufacturing of automobiles and their components. Glass forms an important part of the automobile that influences the visibility of the driver and must conform to strict safety rules. Glass also has a significant effect on the aesthetics of car.
In press bending, the glass sheet is first heated to temperatures of about 650℃ and subsequently vacuum pressed on a steel mould. Direct contact between a rigid mould and the glass leads to inadmissible defects in the glass. To ensure the quality of the glass, a heat-resistant separation material (HRSM) is used. Nowadays, knitted steel fibre fabrics cover the mould. The knitted steel fibre fabrics come in direct contact with the glass and thus play a primary role in the quality of the formed glass, for example windshields, rear windows, etc. Currently, steel fibre HRSM is considered to be the best for this application, in spite of high cost of the steel fibres and fabrics.
The first step of the process is heating the flat glass plate from room temperature up to approximately 620℃ in a furnace at a temperature of 690℃. The furnace is normally heated by a combination of hot air convection and infrared radiation. In the second step, the glass is picked-up under vacuum on the segmented bending shuttle ring that moves up from under the rollers. The glass is pressed by vacuum against the mould covered with HRSM material. After pressing, the bending ring moves down and the rollers transport the formed glass window to the quenching zone. Finally, the window is rapidly quenched.
Stainless steel fiber/PBO fiber (blended) mesh belt is a warp knitted fabric woven from stainless steel fiber and PBO fiber blended yarn. It has both the excellent high temperature resistance and physical and mechanical properties of stainless steel fiber, and the excellent softness of super fiber-PBO fiber at high temperatures. Therefore, it is used in the high-end automotive glass molding process as a covering material for the molding ring. Completely prevents mold marks on glass while acting as a buffer at high temperatures. Ensure the product performance of automotive glass.
Technical Parameters
Items | Thickness (mm) | Density (g/m) | Width(mm) | Breaking strength (N) | Elongation at break (%) | Oxidation increase after heat treatment (%) | Service life (Pcs) | |
Unloading width | Extended width | |||||||
Parameters | 2-3 | ≥50 | 45 | 60-75 | ≥2500 | ≥30 | ≤1.0 | ≥5000 |
Stainless steel fiber thermal conductive mold cloth photos
Stainless steel fiber thermal conductive mold cloth installation status
Lever team has many years experiences in metal fiber production and textile technologies. We have confidence to provide worldwide customers the product with best Cost/Performance rate and service.
Extremely fine steel fibres (12 µm diameter) are spun into yarns and then knitted into fabric, which is used, among other applications, as a mould cover in the formation of automotive glass. High requirements of the glass quality (absence of dioptric distortions) ask for a perfect evenness of the mould cover surface, which depends on the local distortions of the fabric created during tensioning of the fabric over the mould. In this paper, compression behaviour of steel knitted fabrics combined with the fabric deformation in biaxial tension and shear is studied. Interaction of the fabric with the formed glass depends on the local changes of the fabric compression behaviou due to local fabric deformations on the mould. The deformation of the fabric is further linked to quality of the glass using quantitative optical distortion system based on moiré patterns to measure glass dioptric distortions.
Brief Introduction
Design and production of automobiles with more intricate and fantasy shapes and appearance necessitate the usage of more sophisticated production methods for manufacturing of automobiles and their components. Glass forms an important part of the automobile that influences the visibility of the driver and must conform to strict safety rules. Glass also has a significant effect on the aesthetics of car.
In press bending, the glass sheet is first heated to temperatures of about 650℃ and subsequently vacuum pressed on a steel mould. Direct contact between a rigid mould and the glass leads to inadmissible defects in the glass. To ensure the quality of the glass, a heat-resistant separation material (HRSM) is used. Nowadays, knitted steel fibre fabrics cover the mould. The knitted steel fibre fabrics come in direct contact with the glass and thus play a primary role in the quality of the formed glass, for example windshields, rear windows, etc. Currently, steel fibre HRSM is considered to be the best for this application, in spite of high cost of the steel fibres and fabrics.
The first step of the process is heating the flat glass plate from room temperature up to approximately 620℃ in a furnace at a temperature of 690℃. The furnace is normally heated by a combination of hot air convection and infrared radiation. In the second step, the glass is picked-up under vacuum on the segmented bending shuttle ring that moves up from under the rollers. The glass is pressed by vacuum against the mould covered with HRSM material. After pressing, the bending ring moves down and the rollers transport the formed glass window to the quenching zone. Finally, the window is rapidly quenched.
Stainless steel fiber/PBO fiber (blended) mesh belt is a warp knitted fabric woven from stainless steel fiber and PBO fiber blended yarn. It has both the excellent high temperature resistance and physical and mechanical properties of stainless steel fiber, and the excellent softness of super fiber-PBO fiber at high temperatures. Therefore, it is used in the high-end automotive glass molding process as a covering material for the molding ring. Completely prevents mold marks on glass while acting as a buffer at high temperatures. Ensure the product performance of automotive glass.
Technical Parameters
Items | Thickness (mm) | Density (g/m) | Width(mm) | Breaking strength (N) | Elongation at break (%) | Oxidation increase after heat treatment (%) | Service life (Pcs) | |
Unloading width | Extended width | |||||||
Parameters | 2-3 | ≥50 | 45 | 60-75 | ≥2500 | ≥30 | ≤1.0 | ≥5000 |
Stainless steel fiber thermal conductive mold cloth photos
Stainless steel fiber thermal conductive mold cloth installation status
