FI97615C - A method and apparatus for moving nozzle blocks in a glass tempering section - Google Patents

Description

97615

A method and apparatus for moving nozzle blocks in a glass tempering section. - Förfarande och anordning för att förskjuta glashärdningsavdelningens munstycksblock.

The invention relates to a method for moving the nozzle blocks of a glass tempering section, in which method the height position of the nozzle blocks above and below the transport plane of the glass sheets is adjusted, in addition to which the upper and lower nozzle blocks are moved horizontally back and forth 180 ° to each other.

The invention also relates to a device for moving the nozzle blocks of a glass tempering section, the device comprising suspension and height adjusting members supporting opposite ends of the upper and lower nozzle blocks on both sides of the compartments and by means of which in phase shift relative to each other.

20

Applicant's patent publication EP-499026 discloses a thermal reinforcement device in which the height position of the nozzle blocks can be adjusted interdependently, while at the same time reducing the cooling. The height of the plates is adjustable::: 25 mat. EP-581742 discloses a tempering device for glass sheets in which the upper and lower nozzle blocks and can be moved back and forth laterally. The applicant has been using the same principle and structure for more than 10 years * · · 1. It can also be deduced from the figure in the publication (Fig. 1) that the height position of the »· · 30 upper nozzle blocks is adjustable.

· · * ”· 1 As is known, the thinner the glass · '' '', the higher the cooling capacity required. The thinnest glasses have demanded ·. oil quenching because the air quenching power has not been sufficient. On the other hand, thermal reinforcement and tempering of thicker glasses require only a small increase in cooling capacity; compared to natural cooling. For this reason, the known __ _— NO - - - 97615 2 tempering devices are not suitable for tempering both thin and thick glass with a wide range of glass thicknesses. For power cooling, the tempering nozzles must be brought close to the surface of the glass. In this case, when the glass thickness 5 varies, it must be possible to adjust the height of the upper nozzles accordingly in order to obtain the same cooling power on the opposite surfaces of the glass sheet. In addition, it must be possible to adjust the distance between the upper and lower nozzles from the glass in order to adjust the heat transfer coefficient according to the desired cooling capacity. When the nozzles are located close to the surface of the glass, it must be possible to move the nozzle blocks laterally, i.e. transversely to the direction of travel of the glass sheet, in order to avoid the formation of a striped cooling pattern. If the nozzles on opposite sides of the glass were to blow at the same point for a longer period of time, this would cause unfavorable local thermal stresses.

The problem to be solved by the invention is thus to provide an adjustment of the height position of the nozzle blocks 20 with the accuracy of the glass thickness variations independently of each other, while it must also be possible to move the nozzle blocks horizontally.

; In the method according to the invention, the height position of both the upper and lower nozzle blocks is adjusted independently of each other by means of screw jacks and thus the distance of the upper and lower nozzles from the glass to the desired one is adjusted; . ·. value at any glass thickness. In this way, the device according to the invention can be used in a wide range of glass thicknesses for both tempering and thermal reinforcement. a.

»· · II» • · · • · * 'The features of the device are set out in the appended claim 2. The dependent claims 3 to 6 set out preferred embodiments of the structure and operation of the device. In the following, one embodiment of the invention will be described in more detail with reference to the accompanying drawings, in which Fig. 1 97615 shows a cross-section of a tempering section according to the invention; Fig. 2 shows the last block of the same hardening section in the conveying direction 5 seen from above (reference numerals in parentheses denote counterparts related to the lower nozzle blocks 2); Fig. 3 shows a drive mechanism for providing a horizontal oscillating movement of the mouthpiece blocks.

Fig. 4 shows the same mechanism as Fig. 3 turned 90 °; and Fig. 5 shows a detail of the drive mechanism according to Figs. 3 and 4 in a section taken along line V-V of Fig. 4.

The height adjustment 20 of the nozzle blocks 20 will now be described with reference to Figures 1 and 2. Above the plane formed by the conveyor rollers 29 are the upper nozzle blocks 1 and below the lower nozzle blocks 2. Figure 2 shows only the last block in the conveying direction; but the entire hardening section has several consecutive blocks. The suspension ends of the upper nozzle ·, · · 25 blocks 1 are supported by suspension and *: ··: height adjustment members 3. The lower nozzle block 2 is supported by the suspension and height adjustment members 4. The suspension and height adjustment members 3 are supported by the suspension and height adjustment members 3, respectively. and 4 is • · · «t * ί *. at suitable intervals on both sides of the tempering compartment.

30

The upper bevel gear motor 5 rotates, via the upper articulated shafts 9 and 7, 10, screw jacks 11 on which the opposite ends of the nozzle blocks 1 are suspended: horizontal with guides 13 allowing lateral lateral movement of the nozzle blocks 1 or 35 11 respect.

. The mechanical transmission coupling '* * between the screw jacks 11 on opposite sides via the PTO shaft 7 97615 ensures the same height adjustment of the opposite ends of the nozzle blocks 1. By means of the motor 5, the nozzle blocks 1 can thus be driven up and down to the desired height, while the nozzle blocks 1 retain their horizontality and can also move horizontally laterally.

The height of the lower nozzle blocks 2 can be adjusted correspondingly by a lower bevel motor 6 which rotates the lower screw jacks 11 via the lower PTO shafts 9 and 8, 10. There is an intermediate bar 12 13, which allow horizontal lateral movement of the nozzle blocks 2.

1 5

Referring to Figures 3-5, a drive mechanism for providing horizontal oscillating movement of both nozzle blocks 1 and 2 by one drive motor 18 will be described. . The non-rotating side of the bearing unit 25 is fixed to the vertical guide 16. The push arm 14 1 associated with the nozzle block 1 is connected to the vertical guide 16 by means of a slider 26.

· 25 The eccentricity between the toothed belt pulleys 20, 21 and the bearing units 25 is in the same angular position, so that when the toothed belt 21 rotates, the vertical guide 16 retains its vertical position and the slider 26 maintains its height, but the slider 26 II · · is forced to move in the transverse direction by a distance 30 corresponding to the eccentricity of the pins 25a with respect to the central axis of the pulleys 20, 21. Thus, as the toothed belt pulleys 20 and 21 rotate, the nozzle block 1 is forced through the push arm 14 to perform a reciprocating horizontal movement regardless of the height position and height adjustment of the nozzle block. The velocity curve of the oscillating movement of the nozzle block obtained by the eccentric i "35 is substantially sinusoidal.

97615 5

Similarly, a reciprocating horizontal movement is caused to the slider 27 of the lower vertical guide 17 by rotating the eccentrically engaging pulleys 23 and 24 on the bearing units 25 by means of toothed belts 22a and 22b. The driving force is transmitted from the twin pulleys 19, 22 of one motor 18. The eccentricity of the pins adhering to the belt pulleys 23, 24 is 180 ° in phase shift with respect to the eccentricity of the pulleys 20, 21, the upper and lower nozzle blocks 1, 2 moving 180 ° in phase shift. The frequency of the oscillating movement can be adjusted by adjusting the speed of the motor 18, and the amplitude can be adjusted by changing the amount of eccentricity of the pins 25a adhering to the pulleys.

The foregoing description and drawings illustrate only one embodiment of the invention, and the structural details may vary in many ways within the scope of the following claims. For example, the bearing units 25 can be slidably mounted vertically on the vertical guides 16 and 17, whereby the push arms 14 and 15 20 can be fastened directly to these vertical guides.

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Claims (6)

97615 A method for moving the nozzle blocks of a glass tempering section, the method comprising adjusting the height position of the nozzle blocks (1, 2) above and below the transport plane 5 of the glass sheets, in addition to moving the upper and lower nozzle blocks (1, 2) horizontally back and forth 180 ° characterized in that the height position of the upper and lower nozzle blocks (1, 2) is adjusted independently by means of screw jacks (11) and thus the distance of the upper and lower nozzles from the glass is adjusted to the desired value at any glass thickness. A device for moving the nozzle blocks (1, 2) of a glass tempering compartment, the device comprising suspension and height adjustment members (3, 4) supporting the opposite ends of the upper and lower nozzle blocks (1, 2) on both sides of the compartments and by means of the nozzle blocks (1). , 2) the height position 20 is adjustable, as well as means (13; 20, 21, 23, 24, 25, 25a) for moving the nozzle blocks horizontally transversely back and forth in the transport direction 180 ° in phase shift relative to each other, characterized in that the upper and lower nozzle blocks (1, 2 ) are provided with separate suspension and height adjustment members (3, 5, ** 1 7, 9, 10, 11 and 4, 6, 8, 9, 10, 11), which include screw parts • ·; means (11) by which the height of the upper and lower nozzle blocks (1, • · »......::‘ 2) can be carried out independently of each other and at the opposite ends of the nozzle blocks (1, 2). There is a II · mechanical transmission coupling (7, 8) between the 30 gripping suspension and height adjustment members, which ensures the same height yield of the opposite ends, and that: · the upper and lower nozzle blocks (1 , 2) are suspended from the screw diagonals (11) transversely by means of guides (13) which allow said transverse movement of the nozzle blocks. 97615 Device according to Claim 2, characterized in that the two separate suspension and height-adjusting elements comprise a bevel gear motor (5, 6) which rotates, by means of articulated shafts (7, 8, 9, 10), gripping the opposite ends of the nozzle blocks 5 (1,2). screw jacks (11). Device according to Claim 2 or 3, characterized in that the opposite ends of the upper and lower nozzle blocks (1, 2) engage the vertical guides 10 (16, 17) which are arranged to be movable by a rotating power device (18) on eccentrics (20, 21, 23). , 24, 25, 25a) transverse to the conveying direction of the glass sheets and thus forcing the nozzle blocks (1, 2) into lateral movement while allowing said height adjustment of the nozzle blocks. Device according to Claim 4, characterized in that the upper and lower vertical guides (16 and 17) are moved by means of eccentrics 20 (25, 25a) driven by the same motor (18) in a 180 ° phase shift relative to one another. Device according to Claim 5, characterized in that the vertical guides (16, 17) are connected by means of sliders (26, 27) and push arms (14) to the nozzle blocks (1, 2) and the non-rotatable bearing unit (25) of each eccentric. the part is attached to a vertical guide (16, 17). • t • · 1 • · · • · · · · · «· · li» «« · · · · · · · · · · · · · · · 97615