RU190959U1 - Device for tensioning the film during unwinding and printing - Google Patents

Abstract

Device for tensioning deformable materials during unwinding of a roll and printing, containing drive mechanisms, transporting rollers, and a non-driving roller mounted on a pivoting element connected by a hinged fastener with a stationary base having a fixed support, film positioners on rollers and a printing table arranged in this way so that the length of the section of the deformable material between the drive rollers with clamps and non-drive roller mounted on the rotary element is less than the length of the section d of the deformable material on the printing table by 5 ÷ 40%, and the fixers of the film position on the rollers simultaneously pressed or released the deformable material during the movement of the rotating element at the same time or independently from each other in a programmable order. 6 ill.

Description

The field of technology to which the proposal applies.

The offer relates to devices of special types of printing machines for printing on products or materials of unlimited length, as well as to devices for manipulating thin flexible roll materials and installations for tension, leveling or direction of tapes or panels.

The level of technology.

The known method and device for producing a nanoporous polymeric material with open pores by drawing a polymer product based on an amorphous-crystalline polymer at room temperature in the presence of liquid media that cause swelling of the polymer to a strain value of from 10 to 300% of the initial length (US Pat. No. 3,426,754; 1969; USC 128/156). Structural elements of the device are not reflected in the claims.

A known method and device for producing nanoporous polymeric material with open pores by pre-orienting the original polymer when drawing in a medium that causes swelling of the polymer, followed by repeated drawing at room temperature in the presence of liquid media in the direction perpendicular to the direction of preliminary drawing of the original polymer (US Patent 4,257,997; 1981; USPC 264/145).

The structural elements of the device are not reflected in the claims.

The known method and device for producing nanoporous polymeric materials with open pores by uniaxial drawing of a polymer product of elongated form in the medium followed by its removal from the volume of the product under conditions of holding the sample in a stretched state in the direction of drawing .

Combustible flammable liquid organic agents, such as aliphatic ketones, aliphatic esters, halogenated hydrocarbons, hydrocarbons, nitrogen-containing compounds, esters, or mixtures of two or more of the above components, are used as the medium in this method. Structural elements of the device are not reflected in the claims.

The disadvantages of this method are its complexity, high cost and fire hazard due to the use of expensive flammable agents for drawing polymer products, as well as special environmental indicators of the method associated with the use of large quantities of toxic and flammable solvents for drawing polymer products and the need for a recovery stage. solvents after completion of the process.

The known method and device for producing nanoporous polymeric materials with open pores by uniaxial stretching of an elongated polymer product in a physically active liquid medium (PFAS) followed by its removal from the bulk of the product under conditions of holding the article in a stretched state in the direction of the extract, amorphous a glassy or amorphous-crystalline polymer with a degree of crystallinity higher than 10%, and an aqueous emulsion of an oil-in-water type, containing water as a prod heavy phase and emulsified in water FAWS, not miscible with water at the temperature of the extract, as the dispersed phase, while the amount emulsified in water FAWS should be at least 2 vol. % (Patent of the Russian Federation 2 576 049, IPC C08J 9/28, В82В 1/00 of 06/09/2014). Structural elements of the device are not reflected in the claims.

A device is known for producing a stretched thermoplastic film that can be used as a printing material, including an extruder for extruding a thermoplastic polymer in the form of a web, a cooling roll for operation at a peripheral speed (Vj) and at a temperature (Tj) for receiving and cooling said web with thus obtaining a film, a second roll for operation at a peripheral speed (V2) exceeding said Vj, for receiving said film at a temperature (T2), said second Alok distanced from said chill roller to obtain the interval between the rolls, not more than one inch between said chill roller and said second roller for stretching said film to form a film, characterized by a uniform thickness. The structural elements of the device are reflected in the claims only by the shape of the rolls and the speeds of their rotation. The design of the device does not allow printing on films of rigid-elastic polymers.

Known printing machine to perform printing on the basis in the form of a roll, designed to be applied to it, at least one print, which contains at least one transmission system for feeding the substrate to the printing cylinder, at least one cylindrical or flat stencil printed form having a squeegee; at the same time, the screen printing plate interacts with the printing cylinder and performs screen printing with ink containing pigments that can be oriented with a magnetic field and an unloading system for extracting the substrate after printing is completed (Patent RF 2333105, IPC B41F 17/14 published 10.08.2007. Bul. No. 22).

The design of the device does not allow printing on films of rigid-elastic polymers.

A device (AS USSR 1801911, IPC V65N 16/00. Published in 1999) is known for unwinding a roll material containing drive rollers connected by a lamellar chain, closed elastic belts and a drive for their rotation, and plate fastenings of the drive rollers have the ability to change the geometric shape of the support surface depending on the configuration and size change of the roll section.

A disadvantage of this device is the varying circumferential force transmitted to the roll during the unwinding process, which, as the diameter of the roll decreases, changes to a value that does not allow it to rotate. Unwinding in this case is carried out mainly due to the tension forces of the material developed by the working bodies of sequential mechanisms installed on the technological path of the machine. This circumstance creates an uneven stress-strain state of the material during the process, which then affects the accuracy of the length measurement, the dimensional characteristics of the cut parts and the quality of the finished products.

An unwinding device is known (RF Pat. No. 2,191,152. MKI V65N 16/00, published 10/20/2002) containing rolls mounted on consoles and a driving drum, covered in "chessboard" order by closed belts. According to this technical solution, the rolls are installed with the possibility of their simultaneous simultaneous rotation with closed belts around the drive drum, while the mechanism of synchronous changing the position of the closed drive belts is made with the condition of ensuring the constancy of their grip forces with the unwinding roll.

A disadvantage of this device is the structural complexity associated with the presence of a mechanism for changing the position of closed drive belts.

The closest in purpose and device is a device for tensioning deformable materials when unwinding a roll and printing, containing a non-driving roller conveyor mounted on a spring-loaded turntable, connected by a hinged fastener with a stationary base, having a fixed support, forming a slit gap for moving material with the possibility of stabilizing its tension . (Patent of the Russian Federation 2291099, IPC В65Н 23/00, published 10.01.2007 byul. №1)

A disadvantage of the known device is the inability to tension the sealed local area of the material to relative elongations of 5-40% and keeping it in the stress-strain state when printing during printing with liquid ink, followed by a reduction in print.

Essence of the sentence

The technical problem, the solution of which is proposed utility model, is the tension of the sealed local area of the material to relative lengthening 5 ÷ 40% and keeping it in a stress-deformed state when printing during printing with liquid ink, followed by a reduction in print.

The technical problem is solved by the fact that the device for tensioning deformable materials during unwinding of the roll and printing, contains a drive mechanism, transporting rollers, and a non-drive roller mounted on a rotary element connected by a hinged mount with a stationary base, having a fixed support, according to the proposal, additionally contains a drive the rotary element, the position of the film on the rollers and the printing table, located so that the length of the section of the deformable material between the drive in The faces with clamps and non-driving roller mounted on the rotary element were 5–40% shorter than the length of the section of deformable material on the printing table, and the clamps of the film position on the rollers simultaneously pressed or released the deformable material while the rotating element was moving simultaneously or independently from each other in a programmable okay

The utility model is illustrated by the device diagrams and the operation description of the device operation.

FIG. 1 - Diagram of a device for tensioning deformable materials during unwinding of a roll and printing:

1 - polymer film;

2 - drive rollers;

3, 4, 5 - locking the position of the film on the rollers;

6 - rotary element with non-driving roller;

7 - a roll of the sealed film on the drive roller;

8, 10 - pre-deformable areas of the film;

9 - deformable part of the film on the table;

11 - printed table.

FIG. 2 - Dependence of tensile stress in the film on the deformation:

12 - the first stretching and contraction;

13 - second stretching and contraction;

14 - the third stretching and contraction.

FIG. 3 - Diagram of a device for tensioning deformable materials when unwinding a roll and printing in a pre-deformation operation stretching a polymer film before printing:

1 - polymer film;

2 - drive rollers;

3, 4, 5 - locking the position of the film on the rollers;

6 - rotary element with non-driving roller;

7 - a roll of the sealed film on the drive roller;

8, 10 - pre-deformable areas of the film;

9 - deformable part of the film on the table;

11 - printed table.

FIG. 4 Diagram of the device for tensioning deformable materials during unwinding of the roll and printing in the position before and after the preliminary cyclic deformation of the polymer film.

1 - polymer film;

2 - drive rollers;

3,4,5 - locking position of the film on the rollers;

6 - rotary element with non-driving roller;

7 - a roll of the sealed film on the drive roller;

8, 10 - pre-deformable areas of the film;

9 - deformable part of the film on the table;

11 - printed table.

FIG. 5 Diagram of a device for tensioning deformable materials when unwinding a roll and printing on a printing operation (applying paint) on a deformed film.

1 - polymer film;

2 - drive rollers;

3, 4, 5 - locking the position of the film on the rollers;

6 - rotary element with non-driving roller;

7 - a roll of the sealed film on the drive roller;

8, 10 - pre-deformable areas of the film;

9 - deformable part of the film on the table;

11 - printed table.

FIG. 6 Diagram of a device for tensioning deformable materials during unwinding of a roll and printing after printing on a deformed film for the operation of reducing the print and drying.

1 - polymer film;

2 - drive rollers;

3, 4, 5 - locking the position of the film on the rollers;

6 - rotary element with non-driving roller;

7 - a roll of the sealed film on the drive roller;

8, 10 - pre-deformable areas of the film;

9 - deformable part of the film on the table;

11 - printed table.

Description of the device in operation mode.

In the first stage (Fig. 1), the film of rigid-elastic polymer material 1 loaded into the device for tensioning easily deformable materials is pressed against the rollers with all three clamps 3, 4, 5 and held at the points of compression by the friction force of the film on the gummed surface of the rolls. Further (Fig. 3) a rotary element with a roller 6, connected by a hinged fastening with a stationary base, rotates (drive not shown) at an angle of 15 degrees and stretches the right (8) and left (10) branches of the fixed film to a relative deformation of 15-25% then (Fig. 4) the rotary element with the roller 6 returns to its original position, allowing the film to spontaneously contract. In this case, “crazes” are formed in the film, micropores in their structure open and close. Restoration of the film size is due to the special deformation properties of a rigid elastic polymer material (Fig. 2). To re-stretch a film of a rigidly elastic polymer material, a voltage of 35-40% less is required.

In the second stage, the film is pulled over the length of the section 11 due to the rotation of the drive roller with the take-up roll 7 and held by the clamps of the position of the film 3, 5. The position lock 4 is not pressed against the roller. Turning at an angle of 45 degrees the rotary element with a roller 6 re-stretches a portion of the film 8 and a portion of the film 9 to a relative deformation of 15-25%, and the film in sections 9 and 8 is deformed again, and the portion of the left branch 10 of the portion practically does not stretch, because . The yield strength of the re-stretching of a film of a rigid-elastic polymer material is less than the yield strength of the stretching of an undeformed film of a rigid-elastic polymer material (Fig. 2).

At the third stage, when the rotary element with the roller 6 reaches the lowest point, paint is applied in a liquid or aerosol state through a screen mold or pattern. Immediately after applying the paint, the rotatable element with the roller 6 returns to its original position and the areas of the film 8 and 9 are reduced to their original dimensions at the rate of relaxation of the elastic deformation of the polymeric material. The sealed film is dried and drawn onto the take-up roll 7.

Claims (1)

Device for tensioning deformable materials during unwinding of a roll and printing, containing a drive mechanism, transporting rollers, and a non-driving roller mounted on a rotating element connected by a hinged fastener with a stationary base having a fixed support, characterized in that it further comprises a rotating element drive, position fixers films on rollers and a printing table arranged so that the length of the section of the deformable material between the drive rollers with clamps and non-drive The alik mounted on the rotary element was 5–40% shorter than the length of the section of deformable material on the printing table, while the position of the film on the rollers is designed to simultaneously press and release the deformable material during movement of the rotary element simultaneously or independently from each other in the programmable okay

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