IE970475A1

IE970475A1 - Method and installation for manufacturing glass objects,¹especially bottles

Info

Publication number: IE970475A1
Application number: IE970475A
Authority: IE
Inventors: Rene Emile Leon Barre
Original assignee: Rene Emile Leon Barre
Priority date: 1996-06-26
Filing date: 1997-06-25
Publication date: 1997-12-31
Also published as: SE9702411D0; IT1292203B1; BE1010971A4; GB2314838A; PT102021B; SE9702411L; GB9713352D0; NL1006414C2; BR9703736A; CA2209070A1; ITMI971505A1; FR2750418B1; GB2314838B; NL1006414A1; PT102021A; FR2750418A1; ITMI971505A0; JPH1053424A; DE19727274A1

Abstract

Method for producing glass objects, according to which method a drop of glass is collected from the outlet of a melting oven and this drop is deposited in a parison mould (1), the method being characterized in that, before this drop is deposited in the parison mould, it is subjected to a shaping operation to give it a shape and size which better allow it to enter the parison mould.<Fig.1>

Description

The invention relates to a method and to an stallation for manufacturing glass objects, especially bottles.

When glass objects, and more particularly bottles of a mn size and highly varying shapes, like those used in the perfume industry are being manufactured, the very first step consists in collecting a drop of glass from a furnace, either by band at the end of a dip rod, or mechanically via a feeder at the end of a channel or alternatively by mechanical collection using a collection robot.

Vext, this drop of glass of circular crosssection is conveyed as far as a parison mould which caxnprieea two half-shells between which there is formed a cavity which corresponds to the shape and volume of the parison to be produced.

This Cavity is in an inverted position in the parison mould, that is to say that the base of the bottle is at the open upper edge of the mould while the neck of the bottle lies at its base.

The base of this mould consists of a gripper in which there is the mould of the ring which will allow the container to be stoppered, either using a stopper made of glass or some other material, or using a screw-cap or any other appropriate system. This gripper is then used to transfer the parison to the subsequent manufacturing stations of shaping, blow moulding, moulding, etc.

The circular cross-section of the drop is, however, an obstacle to introducing it into the parison mould, as the diameter of this drop is, for example, larger than the shortest side of the parison mould.

This introduction could be diverted through a funnel which alters the cross-seotion. of the drop, but in such a case, the pare of the drop which comes into contact wich much of the funnel is cooled more than, the part which does not touch it and therefore generates thermal non-uniformities which lead to production defects in the glass bottle parison, these being particularly prevalent in bottles with tAmalAewgr·*1·* ts weateion-ίΐιμ OPEN TO PUELIC INSPECTION CLOWN biQ RULE 23 JXL No ./£/%......OF T///z/^ defects in surface finish of the bottles obtained.

The defects which may arise in the hotties are therefore the result both of the difference in shape and size of the drop of glass and of the parison mould which is to accommodate it, and of the non-homogeneous thermal distribution in the glass of this drop, which leads to differences in the mobility of the various parts of the drop aa it is being placed in the parison mould and thereafter while the glass parison is being blown.

The particular object of the present invention is to overcome these drawbacks, and the invention therefore relates to a method for producing glass objects, according to which method a drop of glass is collected from the outlet of a melting furnace and this drop is deposited in a parison mould, the method being characterized in that before this drop is deposited in the parison mould it is subjected to a shaping operation to give it a shape and size which better allow it to enter the parison mould.

According to another feature of che invention, after the drop of glass has been shaped, it is conveyed to the parison mould by a chute, the shape of which is adapted to that of the drop of glass thus shaped.

The invention also relates to the installation for using this method as well as to the glass products obtained by using it.

The invention xa represented by way of nonlimiting example in the appended drawings, in which: - Figure 1 is a side view of an installation in accordance with ths invention, - Figure 2 is an enlarged view of the shaper of Figure 1 in the open position, - Figures 3, 4 and 5 illustrate three successive steps in the method, - Figures 6 and 7 represent two modified forms of the shaper and of the chute for two different forms of parison mould.

The object of the present invention is therefore to improve the quality of glass objects and to reduce scrap during manufacture, while at the same time satisfying the desire for creativity as regards the shape and as regards volume, both in respect of the outside of the bottle and in respect of their capacity· According to Figure 1, the reference 1 has thus been used to represent one of the parison moulds of an installation for manufacturing glass bottles, this mould being composed of two parts lx and 12 which can move laterally one with respect to the other and define between them, when placed against one another, the desired, glass parison shape, these two parts lx and 12 of the parison mould fit via their base over the ring mould 1, a gripper which, when the parison mould is open, will support the glass parison in order to transfer it to the next'work stations.

In accordance with the invention, the drop of glass which falls under gravity into the upper opening of the parison mould, passing through a guiding funnel 14, comes from a shaper 2. This shaper receives the drop of glass, which has just been collected from the furnace, in order to modify its shape and in particular its cross» section, to make it best suit the shape of the parison mould and more specially the cross-seetion of the upper opening of this mould so that the molten glass can be plaeed quickly in the entire volume of this parison mould.

This shaper 2 is composed of at least two mould parts 2a, 2a which can move laterally, these being situated directly vertically above the flared opening 3X of a vertical and tubular region 3 of a chute, the crosseection of which corresponds to the cross Section of the shaper 2 so that it can receive the shaped drop of glass 4 by gravity feed with the minimum amount of friction.

The moving parts 2X and 2a constituting the shaper may meet at their base or may not meet, in the latter case, the drop of glass is caught as it travels end is shaped by the moving parts of the shaper before these separate allowing the shaped drop of glass to fall under gravity into the chute 3.

Contact between the drop of glass and the moving parts of the shaper cools the outer surface of the drop of glass. Thus, the inside of the drop of glass is hotter than its outer surface/ but the thermal gradient is homogeneous hecauee of the uniform pressure exerted by the moving -walls of the shaper. This homogeneity is not always complied with during collection, that is to say before the action of the ehaper employed in accordance with the invention.

What is more, as the shaped drop of glass runs down towards the parison mould 1/ the surface of the drop of glass may become heated up by heat transfer from the inside of the drop towards its surface.

The drop of glass exiting the vertical region 3 is ehen diverted through an elbow 5 towards a second region 6 which consists of an inclined chute down which the shaped drop of glass 4 elides. The lower end of thia chute 6 is arranged facing a deflector 7 the lower end 7X of which is situated vertically above the flared opening 14 of the parison mould 1.

Zn this third region 7 of the chute, the deflector has a concave shape against which the drop of glass is held on account of the speed it has picked up in the first tubular and vertical region 3 and in the second region in the fora of an inclined chute 6.

As a preference/ the two parts 2X and 2, of the shaper 2 define between them a cavity 2X the lower end 2t of which is narrowed and has curved surfaces, on the one hand to make it easier to convey the shaped drop of glass towards the parison mould, and on the other hand in Order to position that part of the drop of glass which will later fora the neck of the bottle and which will have to fit over the ring mould la of the gripper in the parison mould, this positioning being achieved from this moment.

Provided above the shaper 2 are a pair of shears Θ which move horizontally and which/ according to the example represented, are intended to cut the drop of glass in. order to detach it, for example, from the end of the bloving iron 9 of a mechanical collection robot which picked up a certain amount of glass from the furnace to - 5 IE 970475 convey it bo above the shaper.

I During this transfer, the blowing iron. 9 (Figure 3) is rotated on itself in order to keep the molten glass more or leas concentric around the end of the blowing iron.

Zn the case of mechanical collection, when the blowing iron arrives vertically above the shaper 2, the rotation of the blowing iron 9 is stopped. A drop of glass 10 which lengthens quickly tends then to form at the end of thia blowing iron and this lengthening drop of glass eaters the shaper 2 which is closed (Figure 4') or in the process of being closed. The shears 8 are :then operated quickly to detach a drop of glass of a given volume from the end of this blowing iron, after whiek the shears 8 open again (see Figure 5} while the blowing j iron 9 is rotated. Next, the two parts of the shaper 2 separate to allow the shaped drop of glass 4 to fall j into the first tubular and vertical region 3 of the chute. while the two parts of the shaper are separated from one another, and in preparation for the next shaping cycle, their internal walls may optionally be lubricated by spraying a lubricant onto them. I i The crooe-section of the shaper 2 and that of the various regions 3, $ and 7 of the chute are adapted to the cross-section of the opening of the parison mould so that the drop of glass introduced into this mould can spread out quickly in it. Thus, according to Figure 6, if with the opening of the parison mould is an oval shape 10 a parting line 10Σ lying along its major axis, the fl'iaper 2 will also have a cavity 2, of corresponding shape and size, the parting line 24 of the two parts of this shaper also lying along the major axis of the oval-shaped crosssection of the cavity 25.

The firsc region 3 of the chute will also have a similar cross -section, while the second and third regions 6 and 7 will be produced in the form of chutes of corresponding cross-section, the region 6 being straight while the region 7 is concave.

Conversely (Bee Figure 7), when the parison mould ** 6 — has a cavity 11/ the parting line llx of -which lien along the shortest dimension of the cavity, the ahaper 2 as well as the chute will have corresponding crass-sections.

In this case, the shaper is thus produced in such a way that its parting line 2S lies along the shortest dimension 2t of its cavity, while the lower end 7S of the third region 7 of the chute is oriented vertically above the parison mould 1 so that the orientation of the crosssection of the drop of glass to be shaped corresponds to the orientation of the cavity of the parison mould 1.

Claims

1. CLAIMS ·

1. Installation for producing glass objects from a drop of glass (10) collected from the exit of a meljting oven and deposited in a parison mould (1), the installation being characterized in that it comprises: I a shaping mould (2) made in at least two parts (2 t , 2,) which can move laterally one with respect to the other, for receiving the drop of glass collected iron the oven, ; a chute (3, 6, Ί) arranged under the shaping mould (2) and connecting the outlet from the shaping mould (2) to the inlet of the parison mould (1). ·

2. Installation according to Claim 1, characterized in that the shaper (2) predisposes the shape of the glass drop to the shape of the parison mould (1) ,

3. Installation according to Claim 1, characterized in that the moving parts (2 t , 2 a ) of the shaper (2) meet at their base.

4. in that (2) and

5. in that (3) , down which the shaped drop of glass (4) falls, ί thia first region being connected by an elbow (5) to a second obligua region (6) in the shape of a chute which guides the drop towards a third region (7) which consistsίof a concave deflector, of which the end via which the; drop exits is oriented vertically above the opening of the parison mould.

6. Installation according to Claim 1, characterized in that the cross-Beetion of the shaper (2) and that of the various regions (3, 6, 7) of the chute are adapted to i the cross-section cf the opening of the parison mould (1) . !

7. Method for producing glass objects, according to which a drop of glass (10) is collected at the outlet of a melting furnace and this drop is deposited in a parison mould (1) for using the installation according to any one Installation according to Claim 1, characterized it includes a funnel (3) below the shaping mould above the chute (6, 7). Installation according to Claim 1, characterized the chute has a first vertical and tubular region of Claims 1 to 6, characterized in that - prior to depositing this drop (10, 4) in the parison mould (1), the drop is subjected to a shaping operation to give it a shape and size which allow it 5 to enter the parison mould (1). and after it has been shaped, the drop of glass (4) is conveyed to the parison mould (1) by a chute (3, 6, 7).

8. Method according to Claim 7, characterized in io that the drop of glass (10) collected from the furnace ie subjected to a uniform pressure exerted by the moving walls (2 X , 2 a ) of the shaper (2).

9. Method according to Claim 7, characterized in that the drop of glass (10) is eaught as it travels by 15 the moving parts (2 X , 2,) of the shaper so that it can be shaped before the moving- parts (2 X , 2,) are separated again to allow the shaped drop of glass to fall into the chute (3).

10. Method according to Claim 7, characterized in 20 that the shaper (2) is lubricated by spraying before the drop of glace (10) ie introduced into this ahaper (2).

11. - Installation according to Claim 1, substantially as herein described with reference to the accompanying drawings .

12. A method according to Claim 7, substantially as herein described with reference to the accompanying drawings .