CN110617761A

CN110617761A - Gravure scraper angle measuring device

Info

Publication number: CN110617761A
Application number: CN201910912646.XA
Authority: CN
Inventors: 姚根龙
Original assignee: SHANGHAI YUNCHENG PLATE-MAKING Co Ltd
Current assignee: SHANGHAI YUNCHENG PLATE-MAKING Co Ltd
Priority date: 2019-09-25
Filing date: 2019-09-25
Publication date: 2019-12-27

Abstract

The invention relates to an angle measuring device of a gravure scraper, which comprises a backup plate (1), a rotating arm (2), a rotating shaft (3), a shell (4), a digital display screen (5), a power supply and an angle sensor, wherein the backup plate is arranged on the shell; the rotating shaft (3), the digital display screen (5), the power supply and the angle sensor are respectively arranged in the shell (4); the shell (4) is fixedly connected with the backup plate (1); the rotating arm (2) is movably connected with the rotating shaft (3); the digital display screen (5) and the angle sensor are respectively connected with a power supply; when the measuring device is used, the backup plate (1) is tangent to the gravure roller at the point of the scraper, and the rotating arm (2) is parallel to the scraper. Compared with the prior art, the invention has the advantages of high precision, low cost, wide application range, convenient operation and the like.

Description

Gravure scraper angle measuring device

Technical Field

The invention relates to the technical field of scraper equipment of printing machines, in particular to an angle measuring device for a gravure scraper.

Background

Since the doctor blade is straight and the gravure roll is round, the convention for the doctor blade angle is: the angle between the plane of the doctor blade and the tangent to the circle of the point where the doctor blade contacts the roll is shown as θ in fig. 1. A suitable blade angle has the following benefits: firstly, the abrasion of the scraper can be reduced; secondly, the aim of scraping ink can be achieved by using the scraper pressure as low as possible; and thirdly, the contact area and the pressure between the scraper and the printing plate roller can be kept constant to the greatest extent in the whole printing process, so that the stability of the same batch of same color and color difference is ensured. For many years, gravure workers have been largely empirical in setting the position and angle of the doctor blade, and have not checked what the angle of the doctor blade is, and indeed, have not been a means for accurately determining the angle of the doctor blade.

In the prior art, as shown in fig. 2, an angle gauge for measuring an angle is specifically used in the following manner: the small cambered surface of the angle gauge leans against the plate roller, the scraper is propped against the left side of the angle gauge, the strip-shaped plate with the deep color part is rotated, the short edge of the strip-shaped plate is completely attached to the scraper, the angle gauge is moved out of the plate roller under the condition that the relative operation position is kept unchanged, and the currently actually measured scraper angle value can be read from the diameter scale of the plate roller corresponding to the right side of the strip-shaped plate. When the angle gauge is used for measurement, because the diameters of the printing rollers are different, the small cambered surfaces of the printing rollers are difficult to completely fit with the outer circles of the printing rollers, and the angle error obtained by measurement is large.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide the gravure printing scraper angle measuring device.

The purpose of the invention can be realized by the following technical scheme:

the gravure scraper angle measuring device is characterized by comprising a backup plate, a rotating arm, a rotating shaft, a shell, a digital display screen, a power supply and an angle sensor; the rotating shaft, the digital display screen, the power supply and the angle sensor are respectively arranged in the shell; the shell is fixedly connected with the backup plate; the rotating arm is movably connected with the rotating shaft; the digital display screen and the angle sensor are respectively connected with a power supply; when the measuring device is used, the backup plate is tangent to the gravure roller at the point of the scraper, and the rotating arm is parallel to the scraper.

Preferably, the angle sensor is a displacement sensor, a resistance-type angle sensor, a capacitance-type angle sensor or a Hall-type angle sensor

Preferably, the shell is provided with a key.

Preferably, the keys include an on-off key, a zero key, and a keep display and restore key.

Preferably, the measuring precision of the measuring device is 0.01.

Preferably, the shell is fixed with the backup plate through glue.

Preferably, the rotating arm is rotatably connected with the rotating shaft; the rotating arm rotates around the rotating shaft.

Preferably, the included angle between the rotating arm and the backup plate is the angle of the gravure scraping knife.

Compared with the prior art, the invention has the following advantages:

firstly, the precision is high: the invention measures the rotation angle of the rotating shaft through the angle sensor, avoids the error generated by a manual reading mode in the prior art, and has the precision reaching 0.01.

Secondly, the cost is low: the angle sensor can accurately measure the angle of the gravure scraper, and the cost is low.

Thirdly, the application range is wide: the method can directly measure the scraper angles of the gravure printing rollers with different diameters without matching the diameters of the printing rollers, and has wide application range.

Fourthly, the operation is convenient; the angle of the gravure scraper can be measured by operating the rotating arm, and the device is simple and convenient to operate.

Drawings

FIG. 1 is an exemplary illustration of a gravure blade angle;

FIG. 2 is a schematic diagram of a prior art angle gauge;

FIG. 3 is a schematic structural view of the present invention;

fig. 4 is a schematic structural diagram of an embodiment of the present invention.

The reference numbers in the figures indicate:

1. backup plate, 2, rotor arm, 3, pivot, 4, shell, 5, digital display screen.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.

Example (b):

as shown in fig. 3, the gravure printing scraper angle measuring device includes a backup plate 1, a rotating arm 2, a rotating shaft 3, a housing 4, a digital display screen 5, a power supply and an angle sensor. The rotating shaft 3, the digital display screen 5, the power supply and the angle sensor are all arranged in the shell 4. The digital display screen 5 and the angle sensor are both connected with a power supply, and the power supply provides power for other units. The housing 4 and the back plate 1 may be fixedly connected by glue, or other connection means, such as screws or bolts, may be used. The rotating arm 2 is movably connected with the rotating shaft 3, and the rotating arm 2 can rotate around the rotating shaft 3. The angle sensor is connected with a digital display screen 5, and the digital display screen is used for displaying the angle value measured by the angle sensor.

The angle sensor is a displacement type angle sensor, a resistance type angle sensor, a capacitance type angle sensor or a Hall type angle sensor, and the rotation angle of the rotating shaft can be measured.

Keys are arranged On the shell 4 of the measuring device and comprise a switch key On/Off, a Hold display and recovery key Hold/Rev and a Zero-setting key Zero.

The use method of the measuring device comprises the following steps:

(1) adjusting the position of a contact point of the scraper and the printing roller, wherein the contact point is a scraper point;

(2) adjusting the scraper to enable a certain distance to be reserved between the scraper and the printing roller;

(3) inserting a backup plate in the measuring device between the scraper and the printing roller;

(4) as shown in fig. 4, the backup plate contacts with the plate roller at the point of the scraper, and the rotating arm clings to the upper pressing plate of the scraper;

(5) and reading the angle value on the digital display screen to obtain the angle value of the gravure scraper.

While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The gravure scraper angle measuring device is characterized by comprising a backup plate (1), a rotating arm (2), a rotating shaft (3), a shell (4), a digital display screen (5), a power supply and an angle sensor; the rotating shaft (3), the digital display screen (5), the power supply and the angle sensor are respectively arranged in the shell (4); the shell (4) is fixedly connected with the backup plate (1); the rotating arm (2) is movably connected with the rotating shaft (3); the digital display screen (5) and the angle sensor are respectively connected with a power supply; when the measuring device is used, the backup plate (1) is tangent to the gravure roller at the point of the scraper, and the rotating arm (2) is parallel to the scraper.

2. The gravure blade angle measurement device of claim 1, wherein the angle sensor is a displacement sensor, a resistive angle sensor, a capacitive angle sensor, or a hall angle sensor.

3. The gravure doctor angle measuring device according to claim 1, characterized in that the housing (4) is provided with keys.

4. The gravure blade angle measurement device of claim 3, wherein the keys include an on-off key, a zero key, and a hold display and restore key.

5. The gravure blade angle measuring device according to claim 1, wherein the measuring accuracy of the measuring device is 0.01.

6. The gravure blade angle measuring device according to claim 1, wherein the outer casing (4) is fixed to the backup plate (1) by glue.

7. The gravure blade angle measuring device according to claim 1, wherein the rotating arm (2) is rotatably connected to the rotating shaft (3); the rotating arm (2) rotates around the rotating shaft (3).

8. The gravure doctor angle measuring device according to claim 1, wherein the angle between the rotating arm (2) and the backup plate (1) is the gravure doctor angle.