Heater structure

Abstract

The invention provides a heater structure capable of securing the degree of cleanness in furnace environment required for drying and firing a large sized substrate such as a glass substrate used for PDP, preventing a heat leak out of the furnace and the entry of dust, and contributing to simplification of maintenance. Electric heaters 2 having heating elements inside the heat insulating elements are assembled together side by side in the heater structure. The shapes of the heaters 2 are convex 5, and a seal plate 6 with a complementary shape corresponding to a concave 4 formed by assembling the heaters 2, 2 is tightly contacted with the concave 4, thereby sealing the clearance b between the heaters 2, 2.

Description

technical field [0001] The present invention relates to a heater structure used in a firing furnace for firing substrates such as glass substrates for plasma display panels. Background technique [0002] In recent years, large-picture flat panel displays (hereinafter, referred to as "FPDs") that can be used as wall-mounted televisions and displays for multimedia are steadily progressing towards industrialization. As such a large-picture FPD, a plasma display panel (hereinafter, referred to as "PDP"), which has both advantages in quality and advantages in manufacturing, can be cited as the strongest candidate product, wherein the advantages in quality are , because it is a self-illuminating type, it has a large viewing angle and good display quality. The advantages of manufacturing are that the manufacturing process is simple and it is easy to realize large-scale. [0003] Manufacturing of PDP such as Figure 9 As shown, the printing, drying, and firing processes are repeate...

AI Technical Summary

Problems solved by technology

[0008] However, when the furnace roof of the firing furnace 50 is opened or vice versa, an appropriate gap d must be provided between the electric heaters 12 in order to operate smoothly, but if the gap d is left intact If it is lowered, heat will leak from the firing furnace 50 and dust outside the furnace will enter the furnace.

Therefore, if Figure 5 ~ Figure 6 As shown, the heat-resistant sealing material 14 is inserted into the gap d to seal it, but when the furnace roof is opened again, unnecessary dust is likely to be generated due to the peeling of the sealing material 14 and the contact between the electric heaters 12, so Detrimental effect on cleanliness required for PDP firing furnaces

Images