An actuating mechanism control method for a glass plate tempering process, comprising: after a glass plate is conveyed into a heating furnace, a monitoring unit monitors in real time energy consumed by a heating element of the heating furnace, and sends the energy consumed to a control unit to compare with a set threshold; and when the energy consumed by the heating element of the heating furnace is greater than or equal to the set threshold, the control unit sends an instruction to an actuating mechanism to control actions of the actuating mechanism to complete a corresponding tempering process procedure. Through the method that the monitoring unit monitors in real time the energy consumed by the heating element of the heating furnace, a heating procedure of the glass plate is more scientifically and precisely controlled, and, therefore, a discharging moment of the glass plate can be accurately determined.

The present disclosure relates to the technical field of glass tempering, and in particular to a method and apparatus for weakening stress patterns of tempered curved glass. A through continuous reversible deformation cavity replaces an original split-type air box to serve as an air grid. A fluid smoothing structure is distributed in the cavity and configured for reducing fluid resistance. An outlet airflow orienting and stabilizing structure is distributed outside the cavity and configured for constraining the direction, flow velocity and flow quantity of a jetted airflow. A butt-joint device capable of changing with the curvature of the cavity surface is arranged between the cavity and an air supply source for the cavity.

A method for designing a quench box having first and second blastheads for tempering at least first, second and third sheets of glass each having a different shape is disclosed. The method comprises (i) using the shape of at least the first and second sheets of glass to calculate a first average surface; (ii) using the first average surface to calculate a quench surface of first and second quench modules of the first blasthead; (iii) using the first average surface to calculate a quench surface of a first quench module of the second blasthead; and (iv) using the shape of at least the third sheet of glass to calculate a quench surface of a quench module that replaces a quench module of the first and second blastheads when used to temper the third sheet of glass.

The present disclosure relates to a rotary transition section and a tempering and forming apparatus for forming bent glass. The rotary transition section includes a main rack and an auxiliary rack. A plurality of flexible shaft rollers for forming glass are arranged at intervals on the auxiliary rack along the glass conveying direction. An end of the auxiliary rack that is closer to a heating furnace is rotatably connected to the main rack. An end of the auxiliary rack that is away from the heating furnace is connected to a traction mechanism arranged on the main rack. In the tempering and forming apparatus employing the rotary transition section, a forming and tempering section has a lifting function to achieve abutment against a roller surface after the rotation of the transition section, which in turn solves the technical problem that the edge of the glass is difficult to form.

A tempering furnace for a glass sheet has a conveyor for the glass sheet, and first convection blow means over the conveyor to heat the glass sheet by hot air jets blown onto its top surface. With second convection blow means, pressurized air external to the tempering furnace may be led to second blow nozzles from which air is discharged as jets towards the bottom surface of the glass sheet. The heating effect of the air jets of the first convection blow means onto the glass sheet is adjustable by adjusting the feeding of electric current to electric elements inside blow enclosures, and the heating effect onto the glass sheet of the jets discharging from the second blow nozzles is adjustable by adjusting the blow pressure of feed pipes.

Provided is a silica glass member which exhibits high optical transparency to vacuum ultraviolet light and has a low thermal expansion coefficient of 4.0−10.sup.−7/K or less at near room temperature, particularly a silica glass member which is suitable as a photomask substrate to be used in a double patterning exposure process using an ArF excimer laser (193 nm) as a light source. The silica glass member is used in a photolithography process using a vacuum ultraviolet light source, in which the fluorine concentration is 1 wt % or more and 5 wt % or less, and the thermal expansion coefficient at from 20° C. to 50° C. is 4.0×10.sup.−7/K or less.

The disclosure relates to glass compositions having improved thermal tempering capabilities. The disclosed glass compositions have high coefficients of thermal expansion and Young's moduli, and are capable of achieving high surface compressions. A method of making such glasses is also provided.

Smooth, heat-treated glass fragments are created by placing a plurality of heat-treated glass fragments into a tumbling or vibrating apparatus. Each heat-treated glass fragment is formed from glass that has been heated to a temperature of at least 1000° Fahrenheit and rapidly cooled to a temperature below 800° Fahrenheit. The plurality of glass fragments is then tumbled or vibrated for a predetermined period of time such that surfaces of the heat-treated glass fragments are smoother than prior to tumbling. The glass fragments are thereafter removed from the tumbling apparatus, resulting in smoothed, heat-treated glass fragments that have a slightly rounded, bead like-shape and are suitable for direct handling without hand protection. The glass fragments as are able to be provide radiant heat in the temperature range of 400° to 800° Fahrenheit. This temperature range and the use of the heat-treated glass fragments provides for a clean burning fire that virtually eliminates any soot and carbon monoxide while burning.

A method and an apparatus for tempering glass sheets. A glass sheet is heated to a tempering temperature and quenching is conducted by blasting cooling air to both surfaces of the glass sheet. The quenching of a top surface and a bottom surface of the glass sheet's both side portions is commenced earlier or is performed at the early stage of quenching more effectively than the quenching of a top surface and a bottom surface of the glass sheet's intermediate portion. As a result, the compression stress required for a desired tempering degree is established on both surfaces of the side portions earlier than on both surfaces of the intermediate portion. In order to achieve this, the cooling air enclosures above and below a glass sheet are provided with a subarea of weakened cooling effect.

A method for controlling discharging of a glass plate in a glass plate tempering technology process is provided. After a glass plate is fed into a heating furnace, a monitoring unit monitors and performs filtering on a working parameter of a heating element in real time, and then transmits the filtered working parameter to a control unit. The control unit compares the filtered working parameter with a specified threshold. After the working parameter reaches a maximum value or a minimum value, and then reaches the specified threshold during a subsequent change, the control unit sends an instruction to a drive mechanism. The drive mechanism acts to move the glass plate out of the heating furnace directly or after a time delay, so as to complete a glass plate heating process. The present disclosure changes a conventional time-based control method, reduces energy consumption, and improves quality of a tempered glass.