Gravity forming continuous thermal bending furnace and using method thereof

Abstract

The invention discloses a gravity forming continuous thermal bending furnace and a using method thereof.The technical problems that the existing thermal bending furnace is unreasonable in structural design, during thermal bending forming,glass is likely to be broken, the curvature cannot be guaranteed, the straightness of the edge cannot be guaranteed, optical quality of the glass is poor, the yield rate is low, the production process is not continuous, and the production efficiency is low are solved. The gravity forming continuous thermal bending furnacecomprisesa furnace body frame, whereinaheat insulating material is closely arranged in the interior of the furnace body frame to form a closed cavity, the furnace body frame comprises sequentially from front to back a preheating station device, a pre-bending station device, a forming station device, a quenching station device, and a cooling station device; a trolley arranged in a single layer in the longitudinal direction of the furnace body frame and a motor-driven mobile system device are arranged in a furnace body, a mold is mounted on the trolley and driven to move from front to back by the movement of the motor-driven mobilesystem device; andmeanwhile the using method of gravity forming continuous thermal bending furnace is provided and can be widely applied to the field ofautomotive glass manufacturing.

Description

technical field [0001] The invention belongs to the field of automobile glass manufacturing, and relates to a continuous hot bending furnace for gravity forming and a use method thereof. Background technique [0002] Many occasions in modern life require the use of glass products with complex shapes. Due to the diversity of glass products and the particularity of glass smelting process, it is impossible to make glass form various complex shapes and curved surfaces during smelting. The complex shape of glass is achieved through It is realized through reprocessing after the glass is formed. [0003] The equipment used to bend glass is called a glass bending furnace. The glass bending furnace needs to bend the glass at a high temperature. After the bending is completed, in order to prevent the glass from breaking, the glass needs to be slowly cooled to room temperature. Heating and cooling are carried out in the same furnace, and some glass needs 3-4 hours for heating and 8-9 ...

AI Technical Summary

Problems solved by technology

But it still has disadvantages: because the heating and cooling of the glass are carried out in the same furnace body, in some cases where the cooling time is much longer than the heating time, the lower furnace body cannot be fully utilized when the glass is heated, and the upper furnace body cannot be fully utilized when the glass is cooled. Until fully utilized, the production process cannot be carried out continuously, the production efficiency is low, the equipment utilization rate is low, and the heat loss is large

[0007] When hot-bending super-large curvature and large-scale automotive glass, the existing hot-bending equipment has the following deficiencies: 1. It is not easy to position the glass when it is placed on the support of the mold, and the local strength requirements for the mold and glass are high, and the glass is easy to damage; 2. When large-curvature glass is bent and formed, the edge of the glass cannot achieve a good fit with the mold by its own weight, and external force is required to assist in forming. At present, manual multi-point pushing is generally used, which cannot guarantee the quality of the edge glass; 3. With the deformation of the glass, the radiation distance of the furnace wire heating tube to each part of the glass is constantly changing, which will cause uneven heating of each part of the glass. The larger the glass, the more obvious the unevenness; at present, there are also devices that use manual furnace wire lifting for temperature compensation. structure, but the manual lifting of the furnace wire cannot guarantee the accurate lifting time and height of the furnace wire, and secondly, it will affect the overall temperature balance inside the equipment

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