SU368077A1 - SCREEN PRINTING MACHINE - Google Patents

Description

one

SUBSTANCE: invention relates to screen m machines intended for printing on flat materials.

A known screen printing machine, containing a fixed product table, a swinging frame with a mesh screen and a doctor blade. The drive of these devices contains mechanisms (cam, gear-rack) with higher kinematic pairs. The presence of such pairs reduces the reliability and durability of mechanisms.

In order to improve the design of the proposed machine nadezhvospi doctor blade device is secured to the rocker arm of the four-lever sharNIrno- molineynonapravl straight guide mechanism Chebyshev, and the printing Raed in parallel to the mesh stencil oloskosti, podv.izhno mounted curved guide yusha, associated oscillating crank to the frame, wherein the molecules The lever is equipped with a finger, interacting with the curvilinear naprail yushi.

FIG. 1 is given the “non-mathematical scheme of the machine; in fig. 2 shows the design of the doctor website and the section along A-A; in fig. 3 is a diagram of the printing apparatus, the beginning of the printing; cha figs. 4 shows the position of the doctor unit and the thumb lever in the printing process; in fig. 5 - doctor blade and finger at the moment of the end of printing;

in fig. 6 - the printing device at the time of separation squeegee from the form; in fig. 7 - squeegee at the time of transfer through the paint roller after the end of printing; in fig. 8 - position

squeegee during idling; in fig. 9 - squeegee at the time of its transfer through the paint roller before printing starts.

The screen printing machine contains a non-mobile table / for stacking products,

a swinging frame 2 and a doctor blade 3, which is mounted on the rocker arm 4 of the four-link articulated four-link rectilinear Chebyshev guide mechanism. The latter contains a drive shaft 5, rocker arms 6 and 7, and a swing guide 8.

Ra.ma 2 is hingedly mounted on support 5 and it has sliding supports 10, in which there is a curvilinear 1 aravl //, which is hingedly connected to the bed by means of a rocker arm 12 and has a straight line section 13 and bevels 14, 15.

In the body of the doctor blade, there are movable guide rods 16 with stops 17, which are fixedly connected to the yoke 18 of the squeegee 19. Spring; For 20 squeezing, set 1a with the blade body and the clip 18. The support pin 22 is fixed on the corns with the help of the rod 21. The printing plate 23 with mesh graphite is attached to the frame 2. The machine works as follows. At the beginning of the process, the princess shape 23 is superimposed on the sewn product 24, which is fastened on table 1, and the practical device is located | It is in the extreme right position. In this case, the lever 4 is located parallel to the plane of the table, and the squeegee 19 is pressed by the spring 20 to the form (in Fig. 2 a gap B is shown formed due to compression of the spring 20). When the crank 5 rotates, the squeegee device 3 makes a complex movement in the plane. FIG. Figure 1 shows the trajectory of the point In the rocker lever 4. The ratios between the levers of the Chebyshev mechanism are chosen in such a way: that part of this trajectory is like a line. In this section of the left-hand trajectory of the LRI, typing takes place, during which between the finger 22 and section 13 it is directed, it is left with the guarantee gap G, and the paint is moved by the doctor blade to the left. Upon completion of the sealing 1 and the finger 22 is under the scythe 15. The squeegee 3 begins to move to the left upwards. Due to the intervening guarantee gap d between the finger and the bevel 15, the frame 2 remains stationary. Upon further movement this gap is selected, a guarantee gap E is created between the squeegee 19 and the mold. The finger turns the forum relative to the support 9. At the same time, there is a mutual displacement of the squeegee and the form. A straight-forward four-linker raises the squeegee while simultaneously shifting it to the left, and the frame 2 with the shape, swinging relative to Olora 9, is shifted B) right. The rakel sheds the paint remaining after printing and, continuing to rise with the mold, returns to its original position (idle). In this case, the finger 22 slides along the bevel / 5, brings the form closer to itself and goes out to the straight line. L | The inline section 13 of the guide //. An insignificant permanent warranty gap is created between the squeegee and the fodder. The paint is set against squeegee. When the finger 22 approaches the OCOS 14, the frame with the form under the force of gravity is lowered. Raquel, continuing to move to its original position, goes under the Krauk, which remains on the grid after alignment. After the squeegee and the mold return to their original position, the process is repeated in the same manner. The invention is a screen printing machine containing a stationary table for products, a swinging frame with a mesh stencil and a doctor blade device, characterized in that, in order to increase the design reliability, the doctor blade device is fixed on the cooler lever of the hinged lever arm of the four-star armline guide line. of the Chabyschev mechanism, which the machine is equipped with, and on the form frame, in a plane parallel to the mesh stencil, a curvilinear guide, connected swinging wheel is installed, and bed, and the rocker arm is equipped with a finger, interacting with the red and linear guide.

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