JPS60176937A - Method and device for glass sheet bending process and heat treatment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industry> Second Field of Application The present invention relates to a method and an apparatus for making it possible to bend glass sheets and for subjecting them to thermal conditioning at the same location.

<Prior art> A method in which a glass sheet heated to the required temperature is movable relative to each other, and two shading parts are bent between the members, making it possible to give the glass sheet the desired shape. It has been known.

It is also known that immediately after being bent, the glass sort is quickly moved to another location where the glass sheet is rapidly cooled by blowing means.

These continuous operations of bending and thermal tempering comprise a furnace for heating the glass to its softening temperature, at least one bending station and at least one tempering station. implemented in the device. A device of this type is described, for example, in French Patent No. 2,178,750 and French Patent No. 2,344,506.

In these devices, transfers are made from one station to another in order to reduce the immobility time separating the operations performed on two successively arriving glass sheets, and to limit the cooling of the sheets that occurs during each movement. It is required that multiple sheets of glass be moved to the station as quickly as possible.

The time and energy advantages that make it possible to improve the efficiency and yield of these devices are
- This can be achieved by reducing the recovery of each transfer. The device is therefore designed in such a way that a plurality of glass sheets are subjected to two types of successive actuation in the same position; a device of this kind is known from French Patent No. 1,059,296. According to this publication, the blowing member is
In reality, the shaded member is a member having a plurality of orifices, holes, or windows drilled into its mounting surface.

In a first step, a shading member is pressed onto a heated glass sheet to give the glass sheet the desired curvature, and in a second step, said shading member is separated and released from the orifice in the direction of the sheet. Air under pressure to be discharged is supplied.

The use of such a blowing member provided with only a plurality of orifices results in an uneven and/or insufficient degree of tempering.

<Problems to be Solved by the Invention> The present invention performs bending of the glass sheet and rapid cooling following the bending at the same station to ensure uniform tempering and to prevent the formation of sheet crack defects. The purpose is to provide means to avoid or reduce it.

The invention also envisages a device of the said means for allowing rapid evacuation of the blowing air making it possible to increase the cooling rate, which device provides very rapid cooling due to the low thermal inertia of the glass. Enables the refining of relatively thin sheets that require

<Means for Solving the Problems> The above means is provided by closely combining a shaping member and a blowing member provided with a number of nozzles and different from the shaping member. For convenience in the present invention, shaping refers to the "front" surface of a member, and shaping refers to the shadow-forming surface of the member, and the "front" surface of the blowing member passes through the end of the device from which air is blown. I'm talking about the surface.

The two different parts cooperate as follows. In a first step, a glass sheet is placed in a bending station, a plurality of forming members and a plurality of blowing members are arranged such that the front surface of the forming member is closer to the glass sheet than the front surface of the blowing member. In this position, the forming member and the blowing member are simultaneously moved toward the glass sheet into the pressing position.

in a second step, such that the front surface of at least one of the plurality of shaping members is further away from the glass sheet than the front surface of the blowing member associated with the shaping member;
For shaping, the parts are moved from the crow sheet. In this positional relationship, the blowing member is supplied with air under pressure.

In a third step, the front surface of the blowing member is shaped further away from the glass sheet than the front surface of the member.
The blowing member is moved from the glass sheet. In this position, the supply of pressurized air is interrupted.

When using this method, the shapes and blowing members are preferably moved in a translational movement perpendicular to the plane of movement of the glass sheet.

An apparatus for using the method of the invention comprises a plurality of blowing members provided with a plurality of nozzles and a plurality of forming members, said forming members being shaped at least on one surface of the member. each is provided with a number of orifices having a cross-section sufficient to permit passage of the nozzle of the blowing member, and the different members are movable relative to each other by separate means. It is.

In one embodiment of the device according to the invention, the blowing member is arranged behind the shaping member relative to the glass sheet, and these different members are moved in the plane of movement of the glass sheet under the action of means such as jacks. It is moved in a substantially vertical horizontal plane and is guided during its movement by rails or sliders.

Embodiment Various advantages of the invention will become clearer from the following description with reference to the accompanying drawing, which shows an embodiment of the device of the invention.

As shown in FIGS. 1 and 2, an apparatus for carrying out the method of the invention comprises a plurality of shaping members and a plurality of blowing members provided with a plurality of nozzles, an assembly thereof. is placed on a bending nibress of known type.

The press, not shown, comprises a mounting base on which a carriage 10 is arranged, which can move horizontally in the front and back direction as indicated by the double-headed arrow.

The head of the press, which is arranged cantilevered on the front side of the carriage IO, is connected to the carriage by means of assembly means 11, as is known in the art.

A blowing box 12 is placed on the head of the bending nibless.
a, 12b are arranged, and each blowey 14a
, 14b are provided. On one of the two heads of the press there is also arranged a male mold 15 pierced by a number of orifices 16, and on the other head a female mold 17. In the case shown in FIG. 1, the female mold 1
7 is a simple closing frame so as to contact the contour of the glass sheet.

The male mold 15 is fixed to the gold metal frame 8 by a plurality of metal rods 1 ( ) around its periphery, and the metal rods 119 are bolted to both edges of the metal frame 18 and the metal rod 119 . Fray J118 was provided with wheels 21;
It is fixed to the toyari noji 20.

This carriage is supported by two rails, one of which is fixed to a metal support 23 with the reference numeral 22.
That's the part that was done. The metal support part 231 is fixed to the bending nib l/s.

Flare J318 is connected to 2 (solid jacks) at its side joints, of which the reference number 24 is marked "I" in the N+ old J figure 2. The mold 15, which is integral with the frame 18 and the carnon 20, is moved under the action of a jack 24. This movement is guided by a slide 26 in the upper part of the device.

The size of the frame 18 is determined to allow the jI passage of the plurality of nozzles of the blowing hox 12b+4h.

Instead of the frame 18, it is fixed to a mold 15 or a perforated plate -ζ, the plurality of merifices of which are arranged in line with the plurality of orifices 16. , resulting in multiple nozzles I 4114:12
It may be moved through a series of orifices.

The length of the plurality of nozzles 14a, 14b is preferably 8 to 25 times the length of the holes.

The different stages of the method of the invention are illustrated in Figures 3A, 3B and 3C.

Glass sea taken out of the furnace]・30 is 2 of bent moon breath
Enter the position between the heads of 11A1. As shown in Figure 2, the positions of the two heads are molds 15 and 17, and blowing boxes 12a and 12b are located at the glass seams 1-
30, and the nozzle 14a,
The tips of 14b are aligned with their respective molds and returned to the rear.

In the second stage, the press head quickly approaches the glass sheet 30 while the relative position of the press and mold remains unchanged. Under pressure, the glass sheet 30 assumes the desired shape as shown in FIG. Immediately thereafter, both press heads separate slightly from the glass sheet 30, resulting in a plurality of nozzles 14a
, +4b is located at a distance rdJ from the surface of the glass. This distance %tll r d-1 is 15 to 100
It would be good if it was an M seal.

At the stage shown in FIG. 3C, the relative positions of the mold 17 and the plurality of nozzles 4a remain unchanged, and the nozzles +
The tip of 4a is slightly retracted from the mold relative to the surface of the glass seal l-, while simultaneously with the aforementioned movement, the nozzle 14b is moved a distance sufficient to pass through the plurality of orifices 16 iJ1. , jack 24 pulls in type I5. At the end of this movement, the tips of the plurality of nozzles 141 are closer to the surface of the sheet 30 than the mold 15.

When these different movements are carried out, the glass sea 1
Air under pressure is supplied to boxes 12a and 2b to reduce the blowing required for refining and tempering. During this operation, the blowing member may be vibrated in a plane parallel to the plane of movement into the glass seam 1. Blowing box 1 during blowing
Static pressure of air of 1 J II'ILS1. 'Typically, the water column is 1500*Ca ~ 2300111].

After tempering, air blowing is discontinued and the heads of the press are returned to their original positions. At the same time type 15,
17 and blowing box 12a.

12b return to their initial position shown in FIG.

Other variant embodiments are also possible. It is thus possible to provide a press part supporting the mold 17 with the apparatus shown in FIG. can be transferred from BuI Co Ingponox 12a to Germany 1''L, thus retracting a plurality of nozzles. In Figures 4 and 3I1, J and C are shown.

In addition, it is possible to use a curved plate having a plurality of orifices like the type 15 as the tu+ type so as to enable the llTi flow of a plurality of nozzles +4a.

- For example, length provided with heating net] 18c
An automobile glass measuring 66 cm in height and 3.15 mm in thickness is processed as follows.

The elapsed time between the discharge from the furnace and the start of the blowing air for tempering is 3 sec, and the press operation is 1 sec.
．． The duration of blowing with vibration is 5 sec.

The method of the present invention not only makes it possible to obtain a glass sheet with homogeneous tempering due to the rapid evacuation of air from a plurality of nozzles, but also makes it possible to obtain a glass sheet practically free of optical defects. enable. In fact, the bending and tempering treatments take place in a very short time and the time advantage achieved compared to known methods that require moving between the two operations is such that the glass sheet is allows a reduction in the amount of heat dissipated by the glass sheet after leaving the glass sheet.

Since the temperature of the glass sheet in the press is the same as that required in the known method, the reduction in heat loss allows the glass sheet to leave the furnace at a lower temperature than required in the known method. Make it. The glass sheets then need to be reheated at temperatures lower than those normally used, which provides energy economy and reduces the risk of deformation of bulky glass sheets. In fact, sheet transport means, usually comprising an automatic clamping member from which a plurality of sheets are suspended, can be carried out by markings caused by slight drifts of the glass near the grips or by optically arranged All transport means used can be used safely as the method of the invention reduces the risk of sheet bending.

[Brief explanation of the drawing]

FIG. 1 is a schematic plan view showing a part of the apparatus for implementing the method of the present invention, and FIG. 2 is a schematic partial sectional view showing a part of the apparatus for implementing the method of the present invention. 3A, 3B and 30 are schematic cross-sectional views that do not show the three steps of the method of the present invention, and Figure 3D is a procedural amendment (method) dated March 1985 by Mr. Manabu Shiga, Commissioner of the Patent Office. 1. Indication of the case 1982 Patent Application No. 237693 2. Title of the invention Method and device for bending and thermal conditioning of glass notebooks 3. Relationship with the person making the amendment outside the vehicle Patent applicant's name Zane-Gobain Vitrage 4, Agent (3 other people) 6. Drawings to be amended 7. Engraving of drawings with content of amendment (no change in content) 8. Engraved drawings of attached documents 1 copy

Claims (1)

[Claims] 1. A vertically suspended glass sheet is heated in a furnace and removed from the furnace after reaching the required temperature, and the shading is placed at the station where the member and blowing member are located. In a method for bending and thermally tempering a glass sheet, the method is characterized in that in its first step the front surface of the shading member (15, 17) is the front surface of the blowing member (14a, 14b). The shading members (15, 17) and the blowing members (14a, 14b) are arranged closer to the glass sheet (30) and maintain this relative position.
) is simultaneously carried towards the glass sheet into the bending position; in the second stage, the shaded member (15° 17)
Shape A (J + A
15, 17) are moved from the glass sheet (30),
At that position, the blowing members (14a, 14b
) is supplied with pressurized air; in the third stage, the blowing of air is interrupted and the shape (= J parts (15, 17
) and the blowing members (14a, 14b) return to the positions they occupied at the beginning of said first stage. 2. The different interlocking movements of the separation and approach of the shaped members (15, 1, 7) and the blowing members (14a, 14b) result in movement in the direction perpendicular to the plane of movement of the glass sheet (30). The bending/thermal refining method according to claim 1, characterized in that the method is carried out by: 3. For shading, a male mold (7) is used as a member, and in the second stage, the front surface of the Afff mold (17) is farther from the glass sheet than the front surface of the blowing member (14b) to be assembled. A bending/thermal refining method according to claim 1 or 2, characterized in that: 4. The front surface of the blowing elements (14a, 14b) has a distance l1iIl, preferably from 15 to 100 w.
(d) The bending/thermal refining method according to any one of claims 1 to 3, wherein the bending process is performed by pulling down from the surface of the sheet (30). 5. Bending of a glass sheet comprising a plurality of shading members and a plurality of blowing members placed at the same station on the head of a bending nibress. ) is provided with a number of orifices (16), and the blowing member is formed by a box (12a, 12b) provided with a number of nozzles (14a, 14b). Bending processing and thermal conditioning equipment. 6. According to the patent claim, at least one of the shaped eq. The device according to scope item 5. 7. The shading is characterized in that the plurality of orifices of the members (15, 17) are aligned in a straight line with the axis of the plurality of nozzles (14a, 14b).
The device according to paragraph 6 or paragraph 6. 8. The shading is at least 1 of part vi' (15, 17)
8. Device according to claim 5, characterized in that the bending knives are movable independently of the other elements forming the bending nib brace. 9. At least one of the shapes A' (15, 17) is driven to move by a pair of jacks (24). 10. A metal support (2) in which at least one of said shape bending elements (15, 17) is connected to the head of the bending nib press.
10. The device according to claim 8 or 9, wherein the device is fixed to a carriage (20) provided with wheels (21) moving in a rail (22) J- fixed to 3).