RU2515658C1 - Sheet glass bending mould - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: sheet glass bending mould has a base and supports mounted thereon, which hold the forming frame with given curvature of the forming surface. The supports are in form of two elements lying at an acute angle to each other and capable of adjusting the curvature of the forming frame. The mould further includes support bars mounted on the base of the mould parallel to each other and lying outside the space of the forming frame.

EFFECT: improved optical and geometric properties of glazing with given surface curvature.

2 dwg

Description

The invention relates to the building materials industry, in particular to the field of manufacture of curved glass, and can be used in the glass industry to obtain curved products used, for example, as aircraft glazing.

Usually, aviation glazing contains 2-3 glasses of various thicknesses glued together with the corresponding polymeric material or polyvinyl butyral film. Curved glassware is obtained, as a rule, by the classical method of bending, i.e. by bending glass workpieces under the action of their own weight in batch furnaces at a glass softening temperature on molds with a given curvature of the forming surface.

A known form for molding sheet glass containing a base, support legs mounted on it, which hold the forming frame with a given curvature of the forming surface according to US Pat. No. 4119428, IPC C03B 23/02, publ. 10/10/1978.

A disadvantage of the known form is that it is designed to bend glass blanks with a small deflection arrow. In addition, with a cyclic temperature change from 600 ± 5 ° C to room temperature, the curvature of the forming surface of the frame may change, since it is rigidly fixed to the base of the form.

Closest to the invention is a mold for molding sheet glass containing a base, support legs mounted thereon, holding the forming frame with a given curvature of the forming surface, and two inclined guide elements located above the forming surface of the mold, according to US Pat. No. 4119424, IPC С03В 23 / 02, publ. 10.10.1978.

A disadvantage of the known shape is that it is designed to bend rectangular glass blanks, which after bending are cold worked (cutting and grinding the edges along the contour of the product). In addition, with a cyclic temperature change from 600 ± 5 ° C to room temperature, the curvature of the forming surface of the frame may change, since it is rigidly fixed to the base of the form.

The objective of the invention is to obtain a mold for molding sheet glass, which provides the manufacture of glass blanks with specified overall dimensions for the product and with a given surface curvature.

To achieve the objective of the invention, a mold for molding sheet glass is provided, comprising a base, support racks mounted on it, holding the forming frame with a given curvature of the forming surface, characterized in that the support racks are made in the form of two elements located at an acute angle with respect to each other correction of the curvature of the forming frame, while the form additionally contains support strips mounted on the basis of the form parallel to each other and located outside the space The frame.

The implementation of the support racks in the form of two elements located at an acute angle relative to each other with the possibility of correcting the curvature of the forming frame, allows you to adjust the curvature of the forming frame after almost every bending process. In this case, the curvature correction can be carried out both vertically and horizontally.

The additional content of support strips installed on the basis of the form parallel to each other and located outside the space of the forming frame, provides the placement of technological glass of larger sizes than glass blanks designed to receive products, as provided, for example, in patent RU 2444478, IPC С03В 23/025 publ. 03/10/2012.

Figure 1 shows a form, a top view.

Figure 2 is a form, side view.

The mold for molding sheet glass contains a base 1, support racks mounted on it, made in the form of two elements 2 and 3 located at an acute angle α relative to each other with the possibility of correcting the curvature of the forming frame 4 using the adjusting nuts 5 and 6. Support strips 7 designed to accommodate technological glass are installed on the basis of 1 form parallel to each other and are located outside the space of the forming frame.

On the proposed form for molding sheet glass, 16 cycles of bending were carried out simultaneously for three glass blanks intended for aircraft glazing. At the same time, after each bending cycle, the curvature of the forming frame was corrected according to the control template. The resulting glazing products are distinguished by high optical and geometric indicators that meet the requirements of aviation glazing.

Information sources

1. US patent No. 4119428, IPC C03B 23/02, publ. 10.10.1978.

2. US patent No. 4119424, IPC С03В 23/02, publ. 10.10.1978 - prototype.

Claims (1)

A mold for molding sheet glass, comprising a base, support legs mounted thereon, holding the forming frame with a given curvature of the forming surface, characterized in that the support legs are made in the form of two elements arranged at an acute angle relative to each other with the possibility of correcting the curvature of the forming frame, however, the form further comprises support strips mounted on the basis of the form parallel to each other and located outside the space of the forming frame.

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