POSITIONING DEVICE FOR GLASS BENDING OVEN

Abstract: Positioning device for instance for heating elements in glass bending oven, which positioning device consists in the glass bending oven (1) located mold, build up of pipes (4), in which mold pipes (4) are located in horizontal position on at least two template plates (5) fixed in vertical position. Out of the oven (1) is located a form plate (15), by lifting or lowering of which elements (7) can be separately affected lifting or lowering them so, that edge shape (19) of form plate (15) or opposite form of it can be transferred to form, which elements (7) are desired to form over the mold.

Description: POSITIONING DEVICE FOR GLASS BENDING OVEN The present invention relates to positioning oven , with which for instance heating elements can be located in glass bending oven near to glass and be made to follow precisely the shape glass being bent. One of earlier known ways is for instance to move heating elements one by one with manual steering. Also widely in use is a system in which for heating of upper side of glass is used a frame , which is formed according to final shape of glass , in said frame for instance heating elements are constructed according to shape of the mold and in the final stage of bending these elements have same distance from.the glass. Difficulty in fore mentioned positioning methods is unpredictable result in manual steering and unsuitability for changes in bending shapes and changes of glass sizes. Also upper frames constructed individually for each bending shape are clumsy in use and the need a lot of storage room , and they are unsuitable for use in work , where bending shapes are quickly changed. Positioning device according to present invention is providing a significant improvement in earlier mentioned difficulties. Characteristics of present invention are presented in claim 1. As a major benefit of device according to present invention can be mentioned , that upper heating element is independent of bending shape of glass. Elements can be made to follow which ever shape of mold with convex or concave basic form , because each of the elements are guided precisely and separately from outside of bending oven. It should be observed that for each new shape of bending mold it is needed only one thin form plate , which can be made at the same time with template plates , which are determining shape of the mold. Also during bending in construction according to present invention shape of group of elements is approximately following shape of glass better , than in construction earlier known. In following the invention will be examined more closely referring to drawings enclosed , in which Fig. 1 shows glass bending mold oven in which there is one element positioned. Fig. 2 shows bending mold having all elements positioned. In fig. 1 is shown in the oven (19 located bending mold , which consist in vertical position with fixtures (6) fixed template plates (5) , on which plates (5) are in horizontal position laid pipes (4) , on which pipes glass mend to be bent will be laid. One heating element (7) is hung over the mold with heath resistant ropes (8,9). Ropes are going straight through upper part (2) of the oven (1), which upper part can be lifted up from lift eyes (3) when needed to change mold or glass sheet. Ropes going around rolls (10) are joining in point (12) into one rope (11) , which is drawn over the roll (13) by balancing weight (14). Balancing weight is lifted upwards with form plate (15) and lifting mechanism, which consist lift screws (16) , rotating shaft (18) and rotating motor (17). By controlling lifting of form plate all heating elements (7) can be lowered to simultaneously approach glass to be bent. Even in case of break down in lifting of form plate or if rope is broken of , because of lightness of elements (7) they can not damage mold, while hitting it. In fig. 2 is shown all elements positioned with help of form plate (15) over pipes (4) of the mold. Balancing weights (14) are keeping with ropes (11,8,9) elements (7) positioned. Template plate (15) is made about same plate by cutting plates apart from each other along shape line. Especially should be observed , that form plate (15) can be located straight above the oven (1) and/or balancing weights (14) can be replaced with springs. While only one embodiment of the present invention has been described in detail herein , various modifications and changes may be applied without departing from the scope of the invention.

Claims: CLAIMS 1. Positioning device for instance for heating elements in glass bending oven , which positioning device consist in the glass bending oven (1) located mold , build up of pipes (4) , in which mold pipes (4) are located in horizontal position on at least two template plates (5) fixed in vertical position c h a r a c t e r i z e d in , that out of the oven (1) is located a form plate (15) , by lifting or lowering of which elements (7) can be separately affected lifting or lowering them so .that edge shape (19) of form plate (15) or opposite form of it can be transferred to form , which elements (7) are desired to form over the mold. 2. Positioning device according to claim 1 c h a r a c t e¬ r i z e d in , that movement of form plate (15) is transferred with assistance of ropes (8,9) through upper part (2) of the oven (1) to elements (7). 3. Positioning device according to claim 1 c h a r a c e¬ r i z e d in , that returning movement of elements (7) is caused with balancing weight (14). 4. Positioning device according to claims 1 and 2 c h a¬ r a c t e r i z e d in , that returning movement of elements (7) is caused with spring/springs. 5. Positioning device according to claims 1-4 c h a r a c¬ t e r i z e d in , that group of elements (7) reaches form or opposite form of form plate (15) after form plate is affec ing even to last of elements (7) .

Inventors: REUNAMAEKI PAULI TAPANI, REUNAMAEKI, PAULI, TAPANI
Applicants: GLAMEC OY
Application year: 1989
Main classification: C03B23
IPC codes: C03B23, C03B29