SU1271837A1 - Device for mollifying sheet glass - Google Patents

Abstract

This invention relates to devices for bending sheet glass. To improve the quality of products by eliminating waviness, the bending mechanism is made in the form of two rigid half-frames 3 and 4. Half-frames 3 and 4 are in contact with workpiece 2 along non-working contour block 5. Centering weight of half-frames 3 and 4 should not go beyond the edge of the end 2. 3 Il. IND 00 JOO vj

Description

The invention relates to a device for bending glass and can be used in the manufacture of curved glass in glass factories.

The purpose of the invention is to improve the quality of products by eliminating undulation.

Figure 1 presents the device, a longitudinal section; figure 2 is the same, a top view; in Fig.Z - device in the process of bending.

The device comprises a convex shape 1, the working surface of which is forming for the workpiece 2 (made, for example, ellipse) and the half frames 3 and 4. The contact between the half frames 3 and 4 and the workpiece 2 is usually made through an inactive contour belt 5. The centers of gravity of the half frames 3 and 4 are not must extend beyond the edges of the workpiece 2.

The device operates as follows "

The workpiece 2 is installed on the convex shape 1 together with the clamping half-frames 3 and 4. After that, the device is placed in a furnace (not conventionally shown) and heated. Under the influence of temperature, the workpiece acquires plasticity and begins to bend, acquiring the configuration of form 1. However, the bending of the workpiece 2 is carried out in a limited (moving) zone 0 ₄ 0 ₂ . In this case, the half frames 3 and 4, as they bend, come out of contact with the workpiece 2 (plot 00 ₂ ). Next, we consider a half-frame 3. The appearance of a limited bending zone 0 ^ 0 ₂ is due to the fact that in the zone

Editor G. Volkova

Compiled by

Tehred V. Kadar

• 37 1

0,0 „the moment from the whole half-frame 3, in the section passing through, is valid. point 0 ₂ , is the moment from the right side of half-frame 3 minus part 00 _? , and in the area С ₂ 0 _{} the} moment from the distributed load of the half-frame 3 is compensated by the elastic force arising in the workpiece. The product together with the device is kept in the furnace, performing annealing and cooling of the product. Then the device is removed from the furnace, the product is released and the latter is removed from the device. In a specific embodiment, the elements of the device are priced ceramic.

The use of the invention is to improve the quality of the product by eliminating the waviness of the product caused by the premature contact of the preform sections with the forming surface.

ALLOW

Claims (1)

Claim A device for molding sheet glass containing a convex shape and a bending mechanism, characterized in that, in order to improve the quality of products by eliminating waviness, the bending mechanism is made in the form of two rigid half-frames freely lying on the surface of the sheet glass and separated along the initial contact line of the workpiece with a shape, and the center of gravity of each half-frame is shifted to the periphery of the workpiece, but does not go beyond it. L. Golubeva Proofreader I. Muska Order 6306/23 Circulation 457 Subscription VNIIIPI of the USSR State Committee for Inventions and Discoveries 113035, Moscow, Zh-35, Raushskaya nab., D. 4/5 Production and printing company, Uzhgorod, Project 4,