DE2422332A1 - METHOD AND DEVICE FOR PRODUCING THIN GLASS BOTTLES - Google Patents

Description

PATEN ADVERTISERS

MANITZ, FINSTERWALD & GRÄMKOW

Munich, _r & May 1974

L 2007

Roger, Emile Lambert

Marcel, Jerome, Theophile Van de Walle

22, rue de Civry, Paris 16, Seine, France

and 5, square du Roule, NEUILLY-SUR-SEINE, Hauts-de-Seine, France

Method and device for the production of thin glass vials

The invention relates to a method and a device for producing thin glass vials.

Thin-walled vials or ampoules are already being produced, assuming cold glass tubes fed into a machine cutting, shaping and finally shaping the pieces to be produced by means of burners, blowing in air and grinding rollers.

There are also thin-walled vials or bottles made of plastic, in which a deformable one with the art DR. G. MANITZ · D1PL.-ING. M. FINSTERWALD DIP L.-INC. W. G RA MKOW ZENTRALKASSE BAYER. VOLKSBANKEN β MÖNCHEN 22. ROBERT-KOCH-STRASSE I 7 STUTTGART 50 (BAD CANNSTATT) MÖNCHEN, ACCOUNT NUMBER 7970

TEL. (089) 224211. TELEX OS-29672 PATMF SEELBERGSTR. 23/25. TEL. (0711) 50 72 61 POSTSCHECK: MÖNCHEN 7706S-OOS

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material-supplied pipe press, the exiting pipe is blown out in a mold. In contrast to these thermoplatisehen or Thermosetting materials, however, hot glass cannot be processed in this way, albeit easily glass tubes can be manufactured continuously, it is very difficult to cut them while they are hot, in order to obtain blanks which can then be blown out in suitable shapes.

The present invention has now set itself the task of to create a method and a device with which directly from a glass melt and in particular from In the glass industry commonly used distributors for glass masses are obtained from blanks, which are later obtained be brought into a form in which they are blown into the eternal shape.

For the sake of simplicity, in the present description a bottle is understood to mean any hollow glass body.

The method according to the invention is characterized in that a first, cylindrical, hollow blank (called Vpr blank in the following) is thereby produced in the interior of a glass melt is that a cylindrical, cooled, immersed in the interior of the glass melt body with the molten glass in Is brought into contact that the pre-blank is removed from the melt and that it is removed from it and from the cylindrical body is separated in order to obtain the blank, which is intended to be introduced into a mold in which by blowing it the desired final shape is given "

According to other advantageous characteristics:

- The pre-blank produced in that a cylindrical, a vertical reciprocating motion executing the body Distribution channel for glass masses penetrated and that the pre-blank after leaving this channel and at the end of the downward

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movement of the cylindrical body is obtained by means of a gripping and dividing device, which is so with the Downward movement of the body cooperates that the pre-blank slides along it during the upward movement of the body;

while receiving the pre-blank one of the ends of the tubular pre-blank enclosed outside the distribution channel in such a way that a blank of suitable length is produced which has the shape of a glove finger, and which is later introduced into a mold and becomes the final Shape is blown out.

The device for carrying out the method according to the invention is essentially characterized in that it has at least one distribution channel for glass masses; at least one cylindrical / body that goes into the canal penetrates and performs a vertical back and forth movement, as well as gripping and cutting devices that are outside of the channel cooperate with the cylindrical body.

According to other characteristics:

the cylindrical body is a water-cooled mandrel and when it penetrates the distribution channel it becomes the pre-blank on the lower part of the canal and if it only penetrates the canal the pre-blank becomes on the upper Part of the channel preserved;

- contain the gripping and dividing devices at least a pair of scissors, which may interact with a tong-shaped cover.

The invention is illustrated below with reference to the drawing, for example described; in this show:

Figure 1 schematically shows a vertical section of a possible embodiment of the device according to the invention, the body forming the pre-blank in its

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is in the lower position,

FIG. 2 shows a view corresponding to FIG. 1, with the pre-blank shaping body is in its upper position and

FIG. 3 schematically shows a variant of the exemplary embodiment in which the various phases of the method according to the invention for obtaining the pre-blank on the upper part of the channel and the final shape shown are.

The invention thus makes it possible, using the distributors for glass masses customarily used in the glass industry, that Production of cylindrical objects as blanks which are closed at one end and have a certain length, for example Similar to glove fingers and which are intended to be introduced into a mold and used in a further step final shape to be blown out. It consists in placing around a cooled body (e.g. a mandrel), which dips into the molten glass to produce a relatively thin layer of glass, which is then before its final Solidification is separated from it in that it slides along the mandrel as it returns to its upper position. Cutting devices (e.g. scissors) close around the mandrel and separate the pre-blank from it all connections with the rest of the glass.

The sliding of the glass layer along the mandrel can be facilitated by a forceps-shaped sleeve that covers the neck of the vial forms.

In the embodiment shown in Figure 1, 1 denotes a mandrel cooled by an internal water circulation, who has removed a glass layer 3 from the distribution channel 2 of a glass melt, wherein the one with the mandrel in Touching part of the glass layer has solidified. The fat the layer is determined by the opening of a shell 4,

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which is arranged at the outlet of the distribution channel, and the outer surface of the south or mantle is still very much hot and very malleable. Scissors 5, for example a number of slats in the form of a shutter for cameras, press on the mandrel, penetrate it into the glass layer 3 and hold it firmly, while the mandrel, driven by a Device, not shown, performs an upward movement in the distribution channel.

During the essential process of holding the glass layer in place the scissors can be supported in their task by a tong-shaped opening cover. At hers below Part of the glass layer is completely retained and cooled from the outside, making it easier to move away from Loosen the mandrel, the more conical its end is (as shown in the figures is shown).

The forceps-shaped sheath 6 is made by a water circulation cooled because it is in constant contact with the hot glass.

In Figure 2, the domain is shown in its upper position; the scissors ^ are shown in their fully closed position at the lower part of the mandrel, after they have been in its Whole still have plastic glass tube 3 cut, although the inner and outer layer that with the cold Metal were in contact, were already solidified.

So the role of the scissors is to move the top of the pipe to cut up and merge. At the same time, the amount of glass 3b that was removed from the scissors during cooling was held back, separated from the thorn. This plastic amount of glass wraps itself around the mandrel again and is taken away by it, when he begins his downward movement, so that he has a new solidified layer of glass during his stay in the distribution channel. The pincer-shaped shell

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can therefore open a little to reveal the glass finger that has already been formed; this falls down and becomes, for example passed from a groove 7 in a not shown, him final finishing form, where he, for example by blowing in, takes on the shape of the mold due to its still existing deformability.

The processing time is on the order of one second and the glass layer moved by the mandrel is wide far from being firm, despite the strong cooling from contact with the cold mandrel and the water-cooled one Covering.

The mean wall thickness of the glass vial obtained is of the order of one millimeter. The production speed is greater than with the conventional processes; aside from that it is not necessary for the thin-walled pieces obtained to be post-heated.

In Figures 1 and 2 there are also those additional parts which, although not essential, are useful for a smooth process flow. These are: a cover 8 made of refractory material on the upper part of the mandrel 1 to allow the formation of opaque glass To prevent this point, a pipe 9, which is arranged in all the manifolds and in the lowered state allows easy replacement of the mandrel. The path of the thorn can be known by a person in and of itself (not shown in the figures) mechanism can be changed, which is not part of the invention.

The type and thickness of the metals used to manufacture the dome and the tong-shaped casing are selected so that that they have the most favorable properties. The scissors can be made of the Hastelloy alloy, for example that does not stick to the hot glass; You also will be

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cooled by contact with the forceps-shaped cover, which in turn is cooled by the water circulation.

According to a variant, you can also use the pre-blank on the upper Received part of the distribution channel. The cylindrical body, which also performs a vertical back and forth movement here, dips into the glass contained in the canal without penetrating the canal Channel traverses the pre-blank carries with it on its upward movement. After leaving the melt the scissors cut off any connection with the melt. The scissors can remove the cylindrical body during his Accompany pulling out of the canal. A gripping device holds the blank and the cylindrical body sets its Moves upwards, separating it from the blank, which is then brought into the final form can be. When it arrives in the mold, the blank is shaped like a glove finger with its lower end is closed, while its upper end, which is gripped by the gripping device and. because of it the shape of the neck was given, receives a blow nozzle through which air is blown into the blank, so that the still plastic blank pushes against the inner walls of the mold.

This variant of an exemplary embodiment for carrying out the method according to the invention is shown in FIG the pre-blank is moved upwards.

Here, too, the same parts are shown: a water-cooled mandrel 1, which has a vertical to-and-fro movement executes and which is shown schematically in its various positions, which he during the implementation of the Procedure takes:

In its position I, the mandrel dips into the molten glass 2, with a glass layer 3 of the largest on its surface

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Viscosity forms, which represents the pre-blank.

In its position II, the mandrel 1 is pulled out of the glass and the scissors connected to the mandrel 5 »their movements are independent of the mandrel (the arrangement and control of which do not form part of the present invention) the connection with the glass melt 2 from. They accompany the upward movement of the blank up to position III; in this Moment the gripping devices 6 engage the neck of the future vial and hold the blank in place while the mandrel 1 moves upwards continues and separates from the blank, as the position IV shows.

At this moment the tongs 6, connected to a chain, convey its forward movement with the movement of the mandrel is synchronized, the blank to the final shape 7 (position YI). During this movement (position V) the blank, which is still plastic, can elongate, but still retain the shape of the glove finger.

During the injection of air through a nozzle, not shown, the blank takes the shape of the inner walls of the mold at.

During this time, the mandrel 1, which extends from 3 '. (Position IV) has freed ₍ again a downward movement into the glass melt J2. Out for a new process step (position VII).

It is possible to arrange several gripping devices on the chain, before they get into position III; this gives the blank some time to bring about a temperature equalization, before it is placed in the mold.

Although the procedure is described with only a single mandrel and a single * final shape, is

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It is just as possible to provide several mandrels arranged in parallel and several molds in order to increase the production speed.

The present invention thus makes it possible to utilize the properties of thin, non-post-heated glasses, ie a less compact structure than that of post-heated glasses, so that more flexible parts with increased mechanical resistance are obtained. Due to the low level released
Calorie amounts, it is also possible to blow out the glass
to be made in sleeves made of porous cardboard or cellulose fibers so that they are protected against subsequent impacts.

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Claims (8)

Claims 1. Method of making thin glass vials, thereby ^ g e k e nnmarks that inside a glass melt a first cylindrical, hollow blank (VorRohling called) is generated in that a cylindrical, cooled, immersed into the interior of the glass melt body is brought into contact with the molten glass, that the pre-parison is removed from the melt and that it is separated from it and from the cylindrical body in order to obtain the blank which is intended to be introduced into a mold in which it is given the desired final shape by blowing. 2. The method according to claim 1, characterized that for the production of the pre-blank a cylindrical, cooled body that performs a vertical reciprocating motion in those commonly used in the glass industry Distribution channel for glass mass penetrates. 3. The method according to claims 1 and 2, characterized in that the cylindrical, the vertical Back and forth motion executing body penetrates the distribution channel for the glass masses and that the pre-blank after exiting the channel and at the end of the downward movement of the cylindrical body. 4. The method according to claims 1 and 2, characterized in that the the vertical reciprocating movement exporting body immersed in the distribution channel for the glass masses and that the pre-blank at the top Part of the channel during the upward movement of the cylindrical body is obtained. 5. The method according to claims 3 or 4, characterized g e k e η η - 409847/0942 draws that obtaining the pre-blank thereby takes place that it slides along the cylindrical body and is separated from it by a gripping device with cooperates with the upward movement of the cylindrical body. 6. The method according to any one of claims 1 to 5, characterized in that the pre-blank of the Melt is separated by cutting off the residues connecting them. 7. Device for performing the method described in claims 1 to 6, characterized in that that it has a glass melt, at least one distribution channel for glass masses, at least one cylindrical, chilled body that penetrates the canal and performs a vertical reciprocating motion, as well as grasping and Dividing devices which cooperate with the cylindrical body outside the channel. 8. Apparatus according to claim 7, characterized that the gripping and dividing devices have at least one pair of scissors, possibly with at least a forceps-shaped shell cooperates. 9847/094 2