RU2790913C1 - Method of forming of glass containers - Google Patents

Abstract

FIELD: process for the manufacture of glass products with a neck.

SUBSTANCE: invention relates in particular to bottles with a neck with or without a thread, on the side surface of which an embossing, relief pattern or other graphic design is made. Method for moulding of glass containers includes moulding of glass containers by double blowing. The relief pattern is formed on the inner surface of the glass container by moulding a drop of glass mass with a draft form with a bas-relief of a relief pattern applied to its surface.

EFFECT: possibility to reduce the formation of abrasions caused by the presence of relief patterns on glass containers by smoothing the outer surface of glass products with a neck in the process of their formation while maintaining the type of surface relief of the resulting glass products, glass containers. 1 cl, 1 dwg

Description

The present invention relates to a process for the manufacture of glass products with a neck, in particular bottles, having a neck with or without a thread, on the side surface of which an embossing, relief pattern or other graphic design is made.

To give the bottles an exclusive look in the glass container industry, a pattern is applied directly to the outer surface of the bottle, by applying it to the finishing mold.

However, the negative side of this technology of drawing a picture on the outer surface of the bottle is the appearance of scuffs on it, which occur during the transportation of bottles to the customer and their storage.

The appearance of abrasions is due to the contact of the outer surfaces of the bottles, which are not smooth, since they are made of various patterns or ornaments of convex or concave shapes.

Due to the difference in the shapes of patterns (ornaments) on the outer surfaces of the bottles, the constant contact of the bottles with each other during transportation leads to alternating loads of friction forces that occur on the surface of such products, which leads to abrasion of the material from which the bottles are made (glass ) or damage to the stickers applied to such surfaces, leading to marriage or transfer of products in terms of quality to a lower category of goods.

The claimed invention, the method of molding glass products is aimed at eliminating or reducing the friction forces arising during transportation and storage of such products that have a relief pattern on the surface, due to giving less surface relief.

From the prior art, a device for the manufacture of glass containers of an individual profile is known, including a blowing station for forming a bottle from a rough billet having a formed rim, containing a blowing point, including a blowing mold having side and bottom parts for holding a rough billet, a source of forming air, valve means for selectively connecting the shaping air source to the blow mold for the rough blank bottle, thermal sensor means for generating a signal of the rough blank touching the bottom of the mold, and control means for controlling valve means for connecting the shaping air source to the blow mold based on time the appearance of a signal about the touch of the rough workpiece to the bottom of the mold (RU 2301780 C2, 06/27/2007).

From the prior art there is a method of molding glass products, including setting the mold in a rotary rocker located in the working area, loading a heated drop of glass mass into a mold, shaping it into a finished product shape, opening the mold, removing the finished product from it and cooling it, characterized in that that the molding of the product is carried out in one stage, for which, after placing the drop of glass melt in the mold, its inlet is blocked by a pressing head, and giving the drop of glass melt the shape of the finished product is carried out by pressing by mechanical action of the plunger on the drop of glass melt in the mold, in which the heat-removing the rod, after which the pressing head and the plunger are removed, the mold with the product is transferred from the working area to the cooling platform with air passage holes through which air is passed, and the mold is opened after the finished product is cooled (RU 2763578 C1, 12/30/2021 ).

The general disadvantages of the prior art include the fact that in the manufacture of glass products, such as bottles, the application of relief patterns to their outer surface is carried out by applying a bas-relief to the finishing mold during the manufacture of these products.

The products obtained by this method of molding have the above disadvantages associated with the appearance on their surface with a relief pattern of abrasions that occur during the transportation of products (bottles) to the customer due to contact and friction of uneven (embossed) surfaces.

The task to be solved by the claimed invention is to eliminate the shortcomings of the prior art, while maintaining the simplicity of the method of forming glass products, namely, it is proposed to apply a relief pattern to the inner surface of the glass container (bottle).

The technical result achieved by using the claimed invention is to provide the possibility of reducing the formation of abrasions caused by the presence of relief patterns on glass containers by smoothing the outer surface of glass products with a neck during their formation while maintaining the type of surface relief of the resulting glass products, glass containers.

The essence of the technical solution of the claimed invention lies in the fact that the method of molding glass containers consists in molding glass containers by double blowing, while a relief pattern is formed on the inner surface of the glass container by molding a glass drop in a draft form with a relief pattern bas-relief applied to its surface.

The claimed technical solution is associated primarily with the application of a relief pattern on the inner surface of the bottle.

To perform such a technological operation during the formation of glass containers, a bas-relief of a relief pattern was applied to draft forms.

In the course of the tests carried out, samples of glass containers (bottles) were obtained with a relief pattern on the inner surface of the bottles.

The uniqueness of the proposed method of forming glass containers lies precisely in drawing a pattern on the inner surface of the bottle, by applying it to draft forms, and not to finishing ones.

In addition, in the course of laboratory tests, which simulated increased friction of glass containers in packaging with each other, their full compliance with quality standards was established.

At the moment, a small-scale batch of samples in the amount of 2,700 copies has been completed for transfer to customers.

The essence of the invention is illustrated by the following description and the accompanying illustrations, which show:

Fig. 1 - Scheme for the manufacture of bottles by the method of double blowing on sectional machines.

A drop of glass melt is fed through the guide funnel (pos. I) into the draft form, with a bas-relief of a relief pattern applied and installed with the neck part down.

The throat part of the mold at this moment is closed by the throat molds and the metal plunger. After entering the mold, the drop of glass melt is pressed into the throat part by compressed air supplied from above - the pellet with the printed pattern is compacted and the throat is formed (pos. II).

The duration of neck molding is strictly determined for the type of product and is selected practically. During the period of the metal plunger leaving the hole for the initial blowing, the inner part of the throat is heated by the internal heat of the glass melt.

The compressed air supplied to the hole (pos. III) blows out the bullet and at the same time cools the metal plunger. After inflating the bullet, the draft mold opens and the pellet, which is supported by the closed neck molds, turns 180° (from the “throat down” position to the “throat up” position) and is fed into the open finishing mold (pos. IV).

From the moment of opening the draft form and until the moment of blowing in the final form, the outer part of the bullet is heated by the heat of the inner layers of the glass mass (pos. III, IV, V).

In the finishing form, the final final blowing of the product takes place, already with a relief pattern applied on the inside of the product.

The blowing head of the finishing table of the machine has an additional device that allows you to combine the blowing process with the process of cooling the product inside, blowing (position VI). At the end of blowing, the final mold opens, and the setter places the product with grips first on the cooling table (pos. VII), and from there onto the conveyor of the machine

Thus, the claimed method of molding glass containers provides the possibility of reducing the formation of abrasions caused by the presence of relief patterns on the glass container by smoothing the outer surface of glass products with a neck during their formation while maintaining the type of surface relief of the resulting glass products, glass containers.

Claims (1)

A method for molding glass containers, which consists in molding glass containers by double blowing, characterized in that a relief pattern is formed on the inner surface of the glass container by molding a drop of glass mass in a draft form with a bas-relief of a relief pattern applied to its surface.

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