RU2558839C1 - Glass hemisphere bending unit - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to production of glass bent articles with parabolic or spherical curvature of surfaces. Proposed unit comprises metal carcass, heating chamber, bottom with counterweights, bottom lifting/lowering drive coupled therewith by rod and bending die. It is provided with bending die drive comprising monorail fitted at said metal carcass and pivoting bar. Carriage with rollers sits on monorail and is provided with pivot levers and coupling assemblies for bending die to suspend therefrom while table is fitted on metal carcass under said carriage.

EFFECT: higher accuracy of the glass preset curvature.

1 ex, 3 dwg

Description

The invention relates to the building materials industry, in particular to the field of production of bent glass products with complex curvature of the surface, used, for example, as a glazing of illumination lights for taxi lights of aircraft.

Devices, furnaces or horizontal installations of circular cross-section are usually used for molding such products, so that the most favorable conditions are created for uniform heating and cooling of both the molding form and the workpiece to be molded.

A device for glass molding is known, comprising a furnace mounted with the possibility of vertical movement of its arch and side parts relative to the shape of the molding located on the stationary hearth of the furnace according to ed. testimonial. SU No. 511300, ΜΠΚ C03B 23/02, publ. 04/25/1976.

Closest to the invention is a glass hemisphere bending apparatus comprising a heating chamber vertically moving under with counterweights, a mechanism for raising and lowering the hearth by means of a rod connected to it. (Zheludkov D.D. et al. Installation of molding glass hemispheres. Information sheet VIMI No. 86-2144, publ. 1986).

A disadvantage of the known installation is that when loading large-sized glass blanks onto a mold with a complex curvature of the surface (corresponding to the curvature of the wing surface of the aircraft) it is difficult to accurately and fixedly establish the glass harvesting relative to the mold. This is because the furnace and the mold are preheated to a glass softening temperature and higher. Which complicates the task of accurate and fixed installation of glass work relative to the forming surface of the bending mold. Ultimately, this leads to a high percentage of rejected bent glass blanks due to deviations from a given surface curvature.

The objective of the invention is to reduce the percentage of marriage of bent glass blanks in comparison with the prototype.

This task is achieved by the fact that the proposed installation of molding glass products containing a metal frame, a heating chamber, with counterweights, a mechanism for raising and lowering the hearth, connected to it by means of a rod, and a molding shape, characterized in that the installation is equipped with a device for moving the molding shape including a monorail mounted on a metal frame and an articulated-swivel rod, a carriage on rollers is placed on the monorail, equipped with rotary levers and clutch assemblies, on which veshena form of bending and a carriage mounted on a metal frame table.

Providing the apparatus with a device for moving the bending mold from the hearth of the furnace to the table allows the flat glass blank to be placed in a precisely fixed position relative to the forming surface of the bending mold. At the same time, a monorail mounted on a metal frame and a pivoting-rotary rod provides the movement of the bending form located on the carriage from the working space of the heating furnace to the idle space on the table for loading flat glass blanks and, accordingly, unloading bent from the bending form. The bending form is suspended on the clutch nodes with the carriage, which is placed on the rollers mounted on the monorail. There are pivoting levers on the carriage for raising the bending form above the table surface and lowering it onto the surface of the furnace hearth, and vice versa.

Figure 1 - installation without a device for moving the form.

Figure 2 - installation with a device for moving the mold when it is located on the bottom of the furnace.

Figure 3 - installation with a device for moving the form when it is located on the table.

The installation comprises a metal frame 1, a heating chamber 2, under 3 with counterweights 4, a mechanism 5 for raising and lowering the hearth 3, connected to it via a rod 6, a bending mold 7. The apparatus is equipped with a device for moving the mold 7, which includes a monorail 8 mounted on the frame 1 and the articulated-rotary rod 9. On the monorail 8 there is a carriage 10 on the rollers 11, while the carriage 10 is equipped with pivoting levers 12 and clutch assemblies 13. Table 14 is mounted on spacers 15.

Installation works as follows.

After heating chamber 2 to a glass softening temperature and holding for 30-40 minutes, under 3 with counterweights 4, lower them to their lowest position using mechanism 5 connected to it via rod 6. In this case, form 7 is located on bottom 3 and the table 14 is mounted on spacers 15 (FIG. 1). Next, the assembly of the device for moving the mold 7 is carried out. In this case, the monorail 8 is mounted on the frame 1 and the pivoting rod 9, the carriage 10 is placed on the monorail 8 on the rollers 11, the carriage 10 is equipped with pivoting levers 12 and clutch assemblies 13 (FIG. 2). Then, using the rotary levers 12, the form 7 is lifted above the surface of the hearth 3 and the carriage 10 is moved on the rollers 11 to the level of the table. After that, using the rotary levers 12, the mold 7 is lowered to the surface of the table 14 and the flat glass blank is placed on the mold 7 (Figure 3). The operation of lifting the mold 7 above the surface of the table 14 and moving the mold 7 on the carriage 10 along the monorail 8 to the level of the hearth 3, followed by lowering the mold 7 to the hearth 3, is performed in the reverse order. After lowering the mold 7 with the flat glass blank located on it and the connector of the clutch nodes, the device for moving the mold is dismantled, under 3 it is raised to the upper position and the chamber 2 is heated to the glass softening temperature. After the bending process under the influence of the weight of the glass, the heating of the chamber 2 is turned off.

Example. It is necessary to bend glass workpieces designed to obtain glazed taxi lights for bombers of the TU type. In this case, a mold with a complex curvature of the surface corresponding to the curvature of the wing of the TU aircraft with overall dimensions of 560 × 400 mm is used. The installation has the following parameters: the diameter of the working space of the camera is 2-650 mm, height - 400 mm.

A batch of the above bent glass blanks was obtained. At the same time, the percentage of yield of glass procurements by geometric indicators was 89%, while the same indicator obtained by the prototype has a value of 49%. This circumstance leads to a significant reduction in the cost of glazing products taxiways headlights of aircraft obtained using the proposed installation in comparison with the prototype.

Information sources

1. Auth. testimonial. SU No. 511300, ΜΠΚ C03B 23/02, publ. 04/25/1976.

2. Zheludkov D.D. et al. Glass hemisphere bending installation. Information leaflet of VIMI No. 86-2144, publ. 1986.

Claims (1)

A glass molding installation comprising a metal frame, a heating chamber, with counterweights, a hearth raising and lowering mechanism connected to it by a rod, and a molding shape, characterized in that the installation is equipped with a device for moving the molding shape, including a monorail mounted on a metal frame and articulated-swivel rod, on the monorail there is a carriage on rollers equipped with pivoting levers and clutch assemblies on which a bending form is suspended, and under the carriage and a metal frame with a table.

Images