ES2279669B1 - PROCEDURE FOR THE SEMI-CONTINUOUS TEMPERATURE OF CAR GLASS SHEETS WITH THE USE OF MULTISYSTEM OVEN. - Google Patents

Abstract

Procedure for the semi-continuous tempering of automobile glass sheets with the use of a multi-system furnace, which consists in incorporating at the exit of the oven where the sheet acquires a certain elasticity of a body formed by a male part (2) and a female part (3) roller carrier (4), the male part (2) acting for the deformation of the vitreous piece (20), then passing into a solidification tunnel provided with air insufflators.

Description

Procedure for semi-continuous tempering of auto glass sheets with oven use multisystem

Object of the invention

The present specification refers to a request for an Invention Patent corresponding to a procedure for semi-continuous tempering of glass sheets cars with use of multi-system furnace, whose purpose is to achieve from a multi-system furnace for bending and tempered glass intended primarily for the automotive and with the collaboration of a shuttle press formed by a machine  compact located at the exit of a heating oven for flat glass receiving the glass sheet to be curved and temper, transporting the sheet by rollers to a female ring with the shape of curved glass, incorporated in the lower half-mold, which is desired obtain, and positioning the sheet so that, by means of the scaling On the part of these transport roller, the sheet is located placed on said female ring and which receive a male or semi-upper mold that descends to a pressing position forming the window or glass to obtain, obtaining a tempered in two phases that allows obtain deep curvatures without deformations and minimizing production times.

Field of the Invention

This invention has its application within the industry dedicated to the manufacture of glass sheets application in the automotive.

Background of the invention

First of all it should be noted that in slang glass technician there are differences between hollow glass, glass flat and curved glass.

Hollow glass comprises everything related with bottles, dishes, etc.

Flat glass is used primarily in architecture, mirrors, etc.

Curved glass generates the production of manufactured elements, which originally based on sheets of flat glass, these have been deformed by the action of hot.

The applicant also knows the existence of a glass called tempered, in which the tempera of the glass is get heating it to a suitable temperature and cooling it by blowing with air and thus tense its outer faces providing greater resistance to it, while being given a "plus" of "security passive "since, in the event of its breakage, fragment into small portions or pieces unable to produce Physical damages of consideration to people.

Precisely for this reason stated previously, "curved and tempered glass" is used for mass form in the automotive sector and, currently, in the automobile is verified the use of tempered glass to cover its entire glazed surface except the windshield Forward.

The types of "curved and tempered glass" used in automotive use cylindrical glass and glass spherical, it should be noted that cylindrical glasses are usually mount on the doors and presenting a configuration close to a piece of cylinder, while the spherical glass is the one that Presents in a concave spherical cap configuration.

The rear window and the "guards" or small pieces that are placed as front and rear finials on the side of the car are really spherical glass.

In relation to ovens for tempering glass, it must be stated that there are different in the market furnace manufacturers for glass tempering, and most of these ovens that are currently manufactured are destined, unique and  exclusively to tempered glass for uses Architectural

All existing ovens today they are similar in relation to heating, consisting of a camera hot through whose inner zone runs a roller path ceramic, capable of transporting the glass sheet and delivering it through a slit or outbox in proper conditions of temperature and plasticity.

The heating of the aforementioned furnaces previously achieved by means of electricity, gas or similar, and cold air is blown over the vitreous sheet in order to of tempering the glass.

It should be noted that in the glass industry heating systems and tempered "flat glass" They are universally known technologies.

However, the same does not happen with tempering and curved, since in the automotive industry the equipment, systems, existing provisions and procedures in the market are very specific, not only for "spherical glass" groups and "cylindrical glass" but for different subgroups, since within each of these subgroups there are complete ovens built only for the manufacture of rear windows of Small curvature or similar applications.

Description of the invention

The procedure for semi-continuous tempering of car glass sheets with oven use multisystem that the invention proposes, improves shape significant obtaining the required vitreous sheets, being able even to realize the curved by free fall on the semi-mold or ring-female lower.

More specifically, the procedure for Semi-continuous tempered auto glass sheets with use of multi-system oven object of the invention is constituted from a multi-system furnace for bending and tempered glass, mainly, intended for applicable glass in automotive, which allows the alternative use of different bending and tempering devices in collaboration of a press-shuttle constituting the bending and tempered glass sheets, which allows to achieve curvatures deep, without deformations and in minimum times of production.

The invention can also be used. in a second embodiment for free fall bending, in whose application does not exist the pressing, requiring only the use of a semi-mold or lower female ring on which the glass, in adequate state of plasticity, it is positioned on the lower female ring leaving it in its surface.

The advantages of this configuration are economic, but presents as a disadvantage a decrease in control of geometries and shapes.

It should be noted that the invention is implemented with a male part and a female part generating the curvature of the vitreous sheet when it is equipped with a state of adequate plasticity, comes out of the oven, and is subjected to the action of both pieces to later incorporate it inside of a body equipped with rollers and generating elements of a air flow, which gradually cools the treated sheet to that it obtains the hardness required for its treatment and timely mobilization.

Description of the drawings

To complement the description that is being performing and in order to help a better understanding of the characteristics of the invention, is accompanied herein descriptive, as an integral part of it, a set of planes in which with an illustrative and non-limiting nature, represented the following:

Figure number 1.- Corresponds to a view schematized in side elevation of the constituent elements of the object of the invention, in rest position, corresponding to a procedure for semi-continuous tempering of glass sheets  cars with the use of a multi-system oven.

Figure number 2.- Reflects a view in the which the male and female pieces act on the vitreous sheet to Its proper configuration.

Figure number 3.- Represents a view, also, in side elevation of the moment in which the male part it is separated from the female part and it will be introduced in the interior of the blow tunnel and subsequent stiffening.

Figure number 4.- Corresponds to a view in lateral elevation at the moment in which the vitreous sheet located on the female mold penetrates inside the tunnel.

Figure number 5.- Represents a view of the vitreous sheet that moves through the rollers incorporated in the inside the tunnel receiving the flow of the air blowers, having previously abandoned the female mold where it has been modified its surface.

Figure number 6.- Finally represents a view of the invention in which the vitreous sheet, after being temperate, leave the cooling zone.

Preferred Embodiment of the Invention

The procedure for semi-continuous tempering of car glass sheets with oven use multisystem is constituted from the use of a multi-system oven for tempering and curving glass with destiny, mainly, to the automotive industry, configured as a classic heating furnace and a cooler, formed by a roller path on which the curved glass will run and tempered to be finished cooling by blowers of air.

It should be noted that the heating oven and the cooler are common to different processes of curved / tempered, and can be mounted fixed and are common fans that drive the tempering air and ducts of East.

Between the heating equipment and the cooler lanes are located perpendicular to the axis of the assembly, which are used to introduce, rolling on them, the different tempering and bending devices, and these are positioned transversely by means of a bolt or brake bolt.

The fixed and common parts of the oven join these different tempering devices through quick plugs, the tempering air, the electrical elements, the electronics, tires, etc.

The oven has the advantage of being substantially versatile, as it minimizes investment and can be use any system deemed appropriate and, at the same time, that of bringing dead times due to changes to a minimum model, since the invention allows the use of different  bending / tempering and mold adjustment work is They perform outside the oven.

The multi-system oven allows tempering of continuous flat glass, pressed and tempered spherical glass of small curvature, pressing and tempering of spherical glass of medium and large curvatures, curved and tempered spherical glass by free fall in a second embodiment, curved and tempered in continuous cylindrical glass and curved and tempered in continuous double curvature cylindrical glass.

The invention is implemented with the press-shuttle configured as a machine compact located at the exit of the heating furnace to glass, receiving the glass to be curved and tempered and what transported by ceramic or metal rollers coated with a cover that withstands heat up to female ring with the shape of curved glass, constituting the lower half mold that is desired obtain and position the sheet so that, by means of the scaling of part of these transport rollers, is perfectly placed on said female ring, which is usually metallic and covered with refractory fabric and is hidden below the flat surface formed by the oven rollers and those of the tempering and curving module itself, and once placed and positioned the glass in a suitable state of plasticity, a top male or semi-mold located above the ring descends to a pressing position thus forming the window or glass sheet to obtain, and when withdrawing, the female who it is guided guided and in the direction of the glass, it is incorporated within a space in which a group of nozzles that generate an air flow or insufflation of the tempering air through the part lower or upper manage to modify the state of the sheet.

The glass remains on the female ring for a short time, constituted as the strictly necessary to lose plasticity and acquire sufficient consistency in order to which is then transported by the rollers along of the temperate zone without deforming, and once the glass has acquired the aforementioned consistency, another group of rollers what evacuate from the female ring and transport it, to time that the tempering process continues along the chamber designed for that purpose.

In summary, a temper is performed in two phases, getting a tempering procedure semi-continuous, which allows to obtain curvatures deep, without deformations and minimizing the times of production.

More specifically, the invention achieves that the vitreous sheet (20) leave the oven transported on the rollers (4) to pass to the surface of the female part (3), the which will receive the sheet (20) in a state of plasticity suitable, then acting the male part (2), as shown in figure number 2, sheet (20) that will be provided with the required configuration according to the performance of the male part (2) and the female part (3), continuing to separate the male part (2), as shown in figure number 3, to ensure that the sheet (20), previously deformed, is introduced into the inside the cooling chamber to make it partially modified in its temperature, getting that next rollers (4 ') move the piece gradually inside of the internal zone configured by the pieces (10) and (10 '), in the which the influx or insufflation of elements will be received air jet generators on the part (20) that will slide gradually on the rollers (4 ') until reaching the area of evacuation or exit.

Claims (5)

1. Procedure for the semi-continuous tempering of automobile glass sheets with the use of a multi-system furnace, of those constituted from the use of a multi-system furnace for bending and tempering of the glass destined, mainly, to the automotive industry, configured as an oven of classic heating powered by any type of energy and a cooler formed by a roller path, on which the curved and tempered glass will run to be finished cooling by air blowers, characterized in that the procedure (1) incorporates a multi-system oven which generates the plasticity of the vitreous sheet (20), following its treatment in the multi-system oven to be incorporated on rollers (4), located on a piece, female ring or lower half-mold (3) on the which acts a male or semi-mold upper part (2), forming a shuttle press, following the treatment of the sheet (20) to obtain the curvature requested by the action of the attached of the mentioned parts or semi-molds lower female (3) and upper male (2), inside a tunnel or cooling chamber formed by an upper piece ( 10) and a lower one (10 '), within which there are translation rollers (4') and air blowers for said upper (10) and lower (10 ') parts. 2. Procedure for the semi-continuous tempering of automobile glass sheets with the use of a multi-system oven, according to the first claim, characterized in that the press-shuttle formed by the upper male (2) and lower female (3) semi-mold pieces or semi-molds is It is configured as a compact machine located at the exit of the heating furnace for flat glass, with the female ring or lower half-mold part (3) having a metal surface covered with refractory fabric, which is hidden under the flat surface that they form the furnace rollers and the temper and curved module rollers. 3. Procedure for the semi-continuous tempering of automobile glass sheets using a multi-system oven, according to the first claim, characterized in that the previously deformed glass sheet remains for a short period of time inside the body provided with air insufflation nozzles. of tempering 4. Procedure for semi-continuous tempering of automobile glass sheets using a multi-system oven, according to the first claim, characterized in that the rollers (4), which transport the sheet (20) from the oven to the press-shuttle, and the Rollers (4 '), which gradually move it through the interior of the tunnel or cooling chamber, are made of metallic ceramic material coated with a sheath that supports heat. 5. Procedure for the semi-continuous tempering of automobile glass sheets with the use of a multi-system oven, according to the first claim, characterized in that the bending can be carried out in a second embodiment by free fall, without the use of the male part (2) and acting only the female part (3), falling from a suitable and adjustable height obtaining spherical glass.