1. Surface stress of the glass can be tested with a surface stress meter by placing carefully the test instrument on the glass surface after applying a few drops of immersion liquid at the bottom of the instrument.
Flat glass is divided into tempered glass, semi-tempered glass, and annealed glass based on their surface stresses. According to U.S. ASTM C1048-1997b standard, the ranges of surface stresses for each type of glass are: Tempered glass >69MPa (10,000psi), Semi-tempered glass: 24MPa (3500psi) ~ 52MPa (7500psi).
Full Convection glass tempering furnaces are the ones that use convection heating method on both upper and bottom sides of glass. All the glass types mentioned above can be tempered by full convection glass tempering machine.
The national economic boom and improvement of people’s living standard have led to higher market demand for glass products, with emphasis on product safety, energy saving and quality, such as: dual-pane laminated tempered glass, Low-E glass and other processed products.
A tempering furnace control system is comprised of a host computer and a slave computer. The host computer adopts either an internationally renowned brand IPC or TP1200 made by Siemens A&D Group.
A combined glass tempering furnace is primarily comprised of loading table, pre-heating section, heating section, tempering section, cooling section, unloading table, and control system.
Energy consumption of the amount of energy required to process certain quantity of glass. Installed power of a glass tempering machine takes no effect on its energy consumption but does determine its processing efficiency.
What is the cost structure of a glass tempering furnace?1. Material cost.2. Labor costs for glass tempering furnace operation.3.Other costs such as R&D, maintenance, and upgrading are also components in the total cost structure of a glass tempering furnace.
When the glass enters the glass tempering furnace, due to the physical contact with the rollers, the lower surface of the sheet will expand faster than the upper surface and cause the glass sheet bending up all around, leaving only the center part remaining in contact with the rollers.
