Screen printing of the windshield edge of the hott

Plate printing on the edge of car windshield

in the deep processing and production of the edge of car rear windshield, plate printing is not only an essential link, but also with the attention of car manufacturers, its quality requirements are getting higher and higher, and it requires more and more refinement. The installation of the rear windshield of the car has now realized the installation of no adhesive strips around it. It is completely glued to the car frame with glue buckles, and the periphery of the rear windshield glass is completely exposed. Therefore, the black decorative edge printed on the rear windshield of the car not only plays a role in increasing the friction of the glass surface and making the glass easy to stick to the surrounding frame, but also plays a role in blocking the traces of glue and the car frame and beautifying the appearance quality of the rear end of the car. Therefore, the general middle and high-end car manufacturers attach great importance to the appearance quality of the rear windshield glass, especially the quality of the glass seal, and have required the edge to edge, no stain, no color difference and high-precision printing of the rear windshield glass edge

the so-called edge to edge printing of glass is to make the graphics of the printing plate larger than the periphery of the outer contour of the glass. After the printing scraper prints on the glass, before the ink return plate returns, use the ink suction machine to suck up the ink on the larger part of the printing plate than the periphery of the glass, so that there will be no ink accumulation around the glass when printing the next glass, so as to realize the edge to edge printing of the glass. What it requires is car style. Therefore, the volume and weight of lithium titanate battery are large. The printing of the decorative edge of the windshield should be printed to the edge of the glass and the industrial chain department of high-end equipment aluminum research and development. It is not allowed to leave white edges on the outermost edge of the glass, so that the decorative edge can be compared with the edge of the glass to form a knife cutting axe cutting printing effect. In general, the windshield of cars is allowed to leave a white edge of about 2mm on the edge

the requirements of glass edge to edge printing on the production of base plate, plate and glass positioning fixture, as well as the requirements of printing operation, printing process parameters and the performance of printing machine are different from those of general glass plate printing

I. requirements for the production of the base plate

1. For the automobile windshield with irregular contour, the black belt base plate with decorative edge of the car that is larger than the periphery of the automobile windshield should be produced by using AutoCAD software and shaping and nesting software

2. The blackness of the bottom plate should reach 4. Above 0

3. The precision of the base plate should be high

4. The outer contour of the bottom plate should be smooth, and no convex concave unevenness is allowed

5. The size of the base plate relative to the surrounding size of the glass should be appropriate and should not be too large

II. Requirements for making version

1. Requirements for version tension. Through the distinction between the wire elasticity and electronic universal testing machine and the hydraulic universal testing machine, the following are: the repeated test of toughness, the repeated test of the position of pneumatic bandages and the repeated test of the clamping method. Finally, the size 2 is successfully. 6mx1。 The tension of 6m large version stretched to 24N/cm, and the tension could still be stabilized at about 22n/cm after the version was placed, which met the requirements of glass edge to edge printing on the version tension

2. Requirements for frames. To meet the above requirements, the special aluminum alloy frame with prestress must be used, that is, the long side of the frame protrudes outward into an arc. In this way, when the frame is under tension, the protruding arc frame will naturally straighten, which can easily make the plate reach a high tension, and the effective printing graphic area and printing accuracy of the plate can be greatly improved

3. the thickness of the photosensitive film must be uniform, and the RZ value must be as small as possible, so as to ensure the quality of the printing edge of the glass printing pattern and the clarity of the printing pattern

III. requirements for positioning fixture

1. The material hardness of the positioning fixture must be small and not easy to deform, so as to reduce the wear of the plate at the edge of the fixture when positioning the glass, so as to reduce the occurrence of white lines at the edge of the glass

2 the positioning fixture must use the all inclusive positioning method with the glass edge, and try to reduce the gap between the glass edge and the positioning fixture, so as to reduce the ink accumulation on the glass edge

3. the printing frame of the printing machine is equipped with ink suction. In order to prevent the ink suction head from smashing the plate when the printing frame of the printing machine falls from the ink return position to the printing position, the falling time of the plate must be effectively controlled, and the corresponding time-delay relay must be installed on the printing machine

IV. operation requirements

1. Because the glass printed from side to side must be made into a special isolation device to isolate the glass, and the special suction cups are used for upper and lower pieces, so as to meet the requirements of glass isolation and upper and lower pieces, so as to reduce the artificial damage to the ink surface on the edge of the glass

2. In order to ensure the uniformity of the ink color of the printing black belt, it is required that the cutting edges of the squeegee and ink return plate on the printing frame of the printing machine should be very smooth, and burrs and notches are not allowed; The ink suction nozzle is also smooth without notch and damage

v. requirements for printing process parameters

1. In order to reduce ink accumulation at the edges and ensure the ink absorption effect of the ink suction machine, the ink suction machine can smoothly absorb the excess ink on the plate. The requirement of ink viscosity is lower than that of general glass plate printing, and the thixotropy of the ink is required to be good

2. In order to ensure that the viscosity of ink used in the production process remains stable, the stability of temperature and humidity in the printing workshop is required to be high

3. because the edge of the glass is very hard, in the case of full printing of the glass, due to the printing scraper rubbing back and forth on the plate, the pattern edge wire of the plate will be worn quickly, which will undoubtedly reduce the service life of the plate. In order to prolong the service life of the printing plate, it is required that the pressure of the printing scraper is smaller and the contact is better on the premise that the pattern can be printed

4. The requirements for printing adhesive strips during edge to edge printing are also different from the general requirements for glass printing, and here it is required to use double-layer composite printing adhesive strips. In the composite adhesive strip, the first layer is a high hardness adhesive scraper, which is not in contact with the month to meet the requirements on the garbage pot pepper during the printing process; The other layer is a low hard scratch, which contacts the plate and glass during printing. Its function is to minimize the wear of the plate by the glass edge during the printing process

5. In order to ensure the quality of the ij edge of the glass printing, we must ensure the vacuum degree of the inking machine. The height of the ink suction nozzle and the plate should also be within a certain range. Because the ink suction speed of the ink suction nozzle is consistent with the ink return speed of the ink return plate, in order to ensure the ink suction effect of the ink suction machine, the ink return speed of the ink return machine should also be kept within a certain range

6. in order to make the ink absorption function absorb the excess ink on the plate, the ink covering thickness of the ink return plate should not be too thick, so the ink return pressure of the ink return plate should be adjusted to the appropriate position

when the plate printing machine has the ability to print on ten sides of glass, you can try to print on ten sides