RU2334620C1 - Method of manufacturing food utensils - Google Patents

Abstract

FIELD: technological processes.

SUBSTANCE: method involves loading cardboard blanks of lateral scarfing into a rotary device, glue application, cabling, thermal gluing of opposite scarfing sides to form lateral seam. Besides, method involves bottom blank scarfing out of cardboard, connection of scarfed lateral and bottom parts, bottom forge-rolling and final shaping of article obtained. Additionally a polymer insert is fed to the rotary device, and outer polymer insert surface is overlapped and glued with inner lateral scurfing surface. Further lateral and bottom scarfings are connected by gluing to the bottom of polymer bottom blank insert. Water dispersion of synthetic resin is applied as glue. Lateral seam sealing is performed at 520-560°C, lateral scarfing and polymer insert are glued at 360-390°C, and bottom part is glued to polymer insert bottom at 190-210°C.

EFFECT: obtaining convenient disposable kitchen utensils with increased heat resistance and insulation.

4 cl, 1 tbl, 1 dwg

Description

The invention relates to the manufacture of disposable tableware and, in particular, glasses and cups in which polymeric and paper materials are used.

Known methods and automatic machines for the manufacture of paper cups (for example, SU 1680574 from 09/30/1991; SU 1722876 from 06/19/1990).

Received by known methods, the cups are not strong enough and tight.

Closest to the proposed method is a method of manufacturing paper cups from one, two or three layers of paper. The method includes loading on the carousel mechanism of an automatic machine side-cutting blanks made of cardboard, applying glue, twisting, thermally gluing the opposite sides of the cutting to form a side seam, cutting blanks of the bottom part from the cardboard web, joining the side cutting and the bottom part, rolling the bottom, final molding of the obtained product (SU 1452710 from 01/23/1989).

A disadvantage of the known technical solution is that the resulting products are not tight enough, especially when used for hot dishes and drinks.

The objective of the present invention is to develop a method for producing disposable tableware with increased heat resistance and tightness, convenient when using it, both for cold and for hot dishes.

The problem is solved by the described method of manufacturing dishes having the form of bodies of revolution for food products, which includes loading side blanks made of cardboard onto the carousel mechanism of an automatic machine, applying glue, twisting, thermal bonding of opposite sides of the cutting with the formation of a side seam, cutting blanks the bottom part of the cardboard web, the connection of the side cutting and the bottom part, rolling the bottom, the final molding of the resulting product, in which the carousel the mechanism of the automatic machine additionally serves an insert of the required shape and size for making dishes made of polymer material, twisting of cardboard side cutting is done by combining the outer side of the polymer insert with the inner side of the side cutting and gluing, after which the side cutting and bottom part are glued together at the bottom of the polymer insert of the bottom cathodic billet, while the adhesive uses an aqueous dispersion of synthetic resin, the formation of a side seam suschestvlyayut at a temperature of 520-560 ° C, bonding and cutting the polymer side insertion is performed at a temperature of 360-390 ° C, gluing the bottom portion to the bottom of the insert is performed at a polymer temperature of 190-210 ° C.

Preferably, polypropylene is used as the polymeric material of the insert.

Cardboard blanks can be made of uncoated or coated paper with embossing or without embossing.

The final molding of the product is carried out mainly on the mold under pressure.

Due to the execution of the dishes in such a way that in it one layer (main body) is made of polymer material, and the second layer is made of cardboard (paper), it has increased strength, heat resistance and tightness. In this case, the claimed sequence of actions, as well as the parameters of thermal gluing, are necessary and sufficient to obtain the claimed technical result.

The drawing shows a diagram of the main stages of the technological process of manufacturing glasses.

Cup assembly example

The glasses are assembled on an automatic combined machine of the CBU-DES type, made in Germany.

At the first stage of production, polypropylene (PP) glasses are loaded onto the machine lift. By conveyor PP glasses are fed to the carousel mechanism of the machine. At the same time, cardboard side felling is being loaded. Then, Adhesin J 1626 glue (synthetic resin dispersion) is applied to the inside of the felling. The cardboard side cutting cuts around the PP glass and adheres to it due to glue. Adhesin A 7057 adhesive (resin dispersion) is applied to the opposite end of the cardboard side cutting and the ends of the cardboard cutting are glued together.

At the second stage, the cardboard bottom of the glass is cut down from the rolled web. For this, the web is fixedly mounted on the installation for the web. Using a cutting knife, a cardboard blank is cut down.

Adhesion glue J 1672 (resin dispersion) is applied to the bottom of the glass with a glued side punching, the cut bottom blank is automatically fed and glued to the PP glass.

Then there is a rolling of the bottom to fix it to the bottom and the walls of the PP glass.

The final molding of cardboard blanks on a PP glass takes place on a mold under pressure.

Finished glasses from the machine go to the packaging table, where they are placed in cardboard boxes.

Process parameters

In the flowchart described above, special attention is paid to the process of forming seams and thermal bonding of product parts.

Depending on the size of the cookware, the required amount of dispersion of synthetic resin is pre-installed for bonding various parts.

The side seam is formed as follows. A precisely defined amount of glue (cold) is applied to the workpiece - side cutting to form a seam.

The workpiece exits the cassette with the help of exhaust levers and is placed on a vacuum conveyor. The left edge of the side cut is guided under the glue carrier for the side seam. The vacuum conveyor stops. The nozzle with glue slides over the workpiece. The beginning and end of the glue application length is controlled by the program. After applying glue to the side seam, the vacuum conveyor starts moving again and moves the workpiece to the side seam drying unit, where the side seam is slightly dried, after which the heater is set to a temperature of 550 ° C and the seam is compressed at this temperature for 1-2 seconds.

Similarly, gluing other parts of the glass is carried out by setting a certain temperature on the corresponding heater for the time necessary for bonding the parts.

When gluing a side cardboard cutting with a PP-insert in the form of a glass, the temperature is set at 380 ° C on the heater and maintained for 2-3 seconds.

On the heater of this seam set the temperature equal to 200 ° C and maintain it for 2-3 seconds.

In the process of making dishes, dispersions of synthetic resins permitted in food production can be used. We used resins Adgezin J 1626, Adgezin A 7057, Adgezin A 1672, Adgezin A 7093, made in Germany, Henkel K ... A, Dusseldorf.

As a result of the implementation of the method obtained disposable glasses with a nominal capacity of 450 ml, with an upper diameter of 100 mm The following polymers were used for making glasses: polypropylene, polyethylene, copolymers of propylene with ethylene.

In a similar way, you can get any dishes in the form of bodies of revolution, and use in the method various types of automatic machines having a carousel mechanism forming a frame, nozzles with glue, air (hot and cold), heaters, workpiece feeders, a rotary platform, clamping devices and mold.

Made but by the present method, the glasses have the following quality indicators (table 1).

Table 1 No pp Name of indicator Indicator value one Appearance The surface of the cups is smooth, not torn without dirt, mechanical damage, dents, cracks, holes 2 Color Full-color side cutting cardboard 3 Resistance to hot water Glasses retain their appearance, do not deform and do not crack at a temperature of 100-110 ° С

Claims (4)

1. A method of manufacturing dishes having the shape of bodies of revolution for food products, including loading on the carousel mechanism of an automatic machine, side-cutting blanks made of cardboard, applying glue, twisting, thermal bonding of the opposite sides of the cutting to form a side seam, cutting the bottom blanks from cardboard web, connection of side cutting and bottom part, rolling of the bottom, final molding of the obtained product, characterized in that the carousel mechanism of the automatic machine is supplemented they serve the insert of the required shape and size for making dishes made of a polymeric material, twisting of cardboard side cutting is done by combining the outer side of the polymer insert with the inner side of the side cutting and gluing, then the side cutting and the bottom part are connected by gluing to the bottom of the polymer inserts of the bottom cardboard blank, while the adhesive uses an aqueous dispersion of synthetic resin, the connection of the side seam is carried out at a temperature of 520-560 ° C, kleivanie lateral cutting insert and the polymer is carried out at a temperature of 360-390 ° C, gluing the bottom portion to the bottom of the insert is performed at a polymer temperature of 190-210 ° C. 2. The method according to claim 1, characterized in that polypropylene is used as the polymeric material of the insert. 3. The method according to claim 1, characterized in that the blanks are made of uncoated or coated paper with embossing or without embossing. 4. The method according to claim 1, characterized in that the final molding of the product is carried out mainly on the mold under pressure.