Standard for the most popular flat screen printing

Standard of flat wire printing machine

standard of the machinery industry of the people's Republic of China flat wire printing machine jb/t

flat screen printing machine jb/t

replaces ZB j87

the publication administration of the people's Republic of China approved the implementation of 2000-01-01 on July 12, 1991. Preface

this standard is a revision of ZB j87 023-90 flat wire printing machine. At this time, the mobile station should stop moving orders immediately

compared with ZB j87 023-90, the main technical contents of this standard are changed as follows:

-- the type of flat wire printing machine adapted to this standard, China composite exhibition is the largest and most influential event of composite plastic film composite materials in the Asia Pacific region

-- improve the repeated positioning accuracy of the machine

-- high accuracy of double crosshair printing

-- Requirements for high reliability of machine braking and safety mechanism

-- reduce the noise value

-- change the adjustment range of the doctor blade's plate alignment angle

-- cancel the requirement for vacuum degree of vacuum pump

-- improve the printing test method

-- change the requirements for type test

this standard replaces ZB j87 023-90 from the date of implementation

this standard is proposed and centralized by the National Printing Machinery Standardization Technical Committee

this standard is mainly drafted by Shanghai No.3 printing machinery factory

the main drafters of this standard are Lin Jun and Li Fengmei

this standard was first issued on May 27th, 1990. This standard specifies the basic parameters, technical requirements, test methods, inspection rules, marks, packaging, transportation, storage and accompanying documents of flat wire printing machines

this standard is applicable to flat screen printing machines (hereinafter referred to as screen printing machines) whose substrate is sheet fed. Other flat screen printing machines for printing materials can be implemented with reference

2 reference standard

the provisions contained in the following standards constitute provisions of this standard through reference in this standard. When this standard is published, the editions shown are valid. All standards will be revised. All parties using this standard should explore the possibility of using the latest versions of the following standards

gb 191-1990 pictorial signs for packaging, storage and transportation

gb/t 5226 Industrial machinery and electrical equipment Part 1: General technical conditions

gb/t 6388-1986 transport packaging shipping and receiving marks

gb/t 9969 General instructions for industrial products

gb/t 13306-1991 signs

gb/t 13384-1992 general technical conditions for packaging of mechanical and electrical products

gb/t general provisions for industrial product assurance documents

jb/t 653-1992 printing machine product model preparation method

3 type and basic parameters

3.1 type

semi-automatic type - composed of frame, printing platform, printing part sleeve, transmission part sleeve and electrical part sleeve, etc

3.2 basic parameters

basic parameters shall comply with the provisions in Table 1

Table 1 basic parameters paper nominal size mm maximum printing format mm maximum printing speed printing times/h printing paper thickness mm 880 × 1230 75 × 1100 3000 0.15～5 615 × 880 500 × 765 600 440 × 615 355 × 525720

3.3 the model and name of the product shall comply with the provisions of JB/T 6530

4 technical requirements

4.1 the product shall comply with the provisions of this standard and be manufactured according to the drawings and technical documents approved by the specified procedures

4.2 assembly accuracy

4.2.1 repeated positioning error in X direction is not greater than 0.05mm; Not more than 0.05mm in the Y direction

4.2.2 the doctor blade can be adjusted flexibly

4.2.3 the ink scraper frame should operate reliably and the stroke can be adjusted. The adjustment range of the angle between the doctor blade and the plate is 55 ° ~ 90 °

4.2.4 the ink return plate should be able to adjust the thickness of the ink layer, and the straightness of the ink return plate should not be greater than 0 15 mm。

4.3 electrical quality

4.3.1 the wiring of the electrical system should be neat, all kinds of marks should be complete and correct, arranged in order, and the joints should be firm

4.3.2 the electrical system should work normally and reliably

4.3.3 all exposed conductors of electrical equipment and machinery shall be connected to the protective grounding circuit

4.3.4 the insulation resistance between the power circuit conductor and the protective grounding circuit shall not be less than 1m Ω

4.3.5 withstand voltage test for at least 1s between all circuit conductors of electrical equipment and protective grounding circuit. Except for circuits with voltage lower than PELV

4.4 the braking or safety mechanism is sensitive and reliable to ensure that the machine can stop or immediately return to the original position when it runs to any position, without shaking and crawling

4.5 each transmission part of the machine operates smoothly and reliably, with light jamming, stagnation and spontaneous movement. The protective device is safe and reliable

4.6 the lubrication system works normally, and the pipeline is unblocked without oil leakage

4.7 the platform vacuum adsorption device is fast and reliable, which should ensure that the printed matter will not move during the printing process

4.8 the machine noise shall not be greater than 81db (a)

4.9 printing quality

4.9.1 the crosshair error of the same printing plate for two times is not more than 0.35mm, and the qualified rate is not less than 95%

4.9.2 the relative error of ink layer uniformity is not greater than 25%

4.9.3 the deviation of inking stability shall not be greater than 0.12

4.10 appearance quality

4.10.1 The exposed machined surface shall be free of bumps, scratches, rust and other defects

4.10.2 the coating of exposed plated parts shall be fine, uniform, and free of defects such as peeling and blistering, local light coating, etc

4.10.3 the oxidation strands of exposed oxidized parts shall be uniform, dense and consistent in color, and there shall be no unoxidized spots and other defects

4.10.4 the exposed non machined surface shall be free of pores, bulges, depressions and other defects detrimental to beauty

4.10.5 the coating of painted parts shall be flat, smooth and firm, with uniform color and gloss, without obvious protruding particles and adherents, and the paint film

shall not have sagging, blistering and other defects

4.11 scope of supply of complete sets of products:

a) plane wire printing machine host

b) necessary accessories and vulnerable spare parts

c) tools necessary for operation and maintenance

5 test method

5.1 assembly accuracy detection

5.1.1 repeated positioning error test

suck the dial indicator of the magnetic gauge base on a stationary object, its contact contacts contact the two vertical outer edges of the frame or workbench respectively, move (or rotate) the frame or workbench to make the meter contact it for five times, and calculate the repeated positioning error with the maximum difference of the five table values, which should comply with the provisions of 4.2.1

5.1.2 check the adjustment performance of the doctor blade and its carriage, and check the angle adjustment range between the doctor blade and the plate, which should comply with the provisions of 4.2.2 and 4.2.3

5.1.3 check the adjustment performance of the ink return plate, and check the straightness of the plate mouth with a flat plate and a feeler gauge, which should comply with the provisions of 4.2.4

5.2 electrical quality inspection

5.2.1 cut off the power supply, and the visual inspection shall comply with the provisions of 4.3.1

5.2.2 repeatedly start and stop the machine for three times, and check the operation of the machine in accordance with the provisions of 4.3.2 and 4.4

5.2.3 check the continuity of protective grounding circuit according to the test method in 20.2 of GB/T 5226.1-1996, and it shall comply with the provisions of 4.3.3

5.2.4 according to the inspection method in 20.3 of GB/T 5226.1-1996, the insulation resistance inspection shall comply with the provisions of 4.3.4

5.2.5 according to the test method in 20.4 of GB/T 5226.1-1996, the withstand voltage test shall comply with the provisions of 4.3.5

5.3 idling test

during the test, the machine shall operate continuously at low speed for 120 minutes, at medium speed for 60 minutes, and at rated speed for 15 minutes, which shall comply with the provisions of 4.5 ~ 4.7

5.4 noise test

during the printing test of the machine, use an ordinary sound level meter to measure the A-sound pressure level noise around the machine. The noise test point is 1.5m high from the ground and 1m away from the center around the machine. A total of four points are measured, and the arithmetic mean value should comply with the provisions of 4.8

5.5 printing test

5.5.1 test conditions:

a) ambient temperature (20 ± 5) ℃

b) relative humidity (60 ± 5)%

5.5.2 test method

use 250 g/m2 coated paper and aluminum frame with not less than two-thirds of the maximum printing format to conduct the printing test at 80% of the rated speed of the machine (when the environmental conditions cannot meet the test conditions, it is allowed to choose 70% of the rated speed for printing). The layout is shown in Figures 1 and 2. 40 samples were taken, 20 of which were overprinted

Figure 1 overprint crosshair position

Figure 2 field density measurement point position

5.5.3 loosen the printing plate after the first printing, reposition it for the second printing, and use the division value of 0 L1mm reading microscope is used to measure the overprint crosshairs a, B and C (as shown in Figure 1). The difference between the two line widths but the supply of waste plastic particles 1 is in short supply should not be greater than the provisions of 4.9.1. If one line of the measured three lines is out of tolerance, it is unqualified

5.5.4 ink layer uniformity and inking stability test

5.5.4.1 ink layer uniformity test

continuously print 20 samples (as shown in Figure 2). Measure the density value of the field ink layer at the four corners and the center of the sample with a densimeter, and calculate the relative error of ink layer uniformity according to formula (1), which should comply with the provisions of 4.9.2. μ max=|Dji-Dji|max/Dji × 100%........................................... (1)

where: μ—— Relative error of ink layer uniformity

dji -- density value of various measuring points (I = 1, 2... 5)

dji -- the average density of various measuring points (J = 1, 2, 3... 20)

5.5.4.2 inking stability test

take 20 samples continuously, measure the density value of the same part of the printed sample with a densimeter, calculate the ink application stability deviation according to formula (2), and the response complies with the provisions of 4.9.3. E= ((1/19) ∑ 20j=1 (DJ DJ) 2) 1/2.................................. (2)

where: e - ink application stability deviation

dj -- density value at the same point of each of 20 consecutive samples

dj - the average density at the same point of each of the 20 samples

5.6 appearance quality inspection

visual inspection of product appearance quality shall comply with the provisions of 4.10

5.7 complete set inspection

visual inspection of the complete set supply scope of products, and the results shall comply with the provisions of 4.11

6 inspection rules

6.1 each product must pass the inspection of the quality inspection department of the manufacturer before leaving the factory

6.2 delivery inspection

6.2.1 products shall be inspected according to the contents specified in 5.1 ~ 5.3 and 5.6 ~ 5.7 of this standard before delivery