SU1173569A1 - Stencil printing apparatus - Google Patents

Abstract

A SCREEN PRINTING DEVICE containing a substrate table, a stencil holder, a squeegee and a stencil holder alignment mechanism with a substrate table, including catchers installed on the stencil holder, and slots provided in the substrate table, distinguished by the fact that , in order to expand operational capabilities and improve print quality, the mechanism for combining the stencil holder with the substrate table is provided with two-level copying guides arranged on the base with spring-loaded pivoting elements, the substrate table is provided with supports associated with the two-level copier guides of the alignment mechanism, the stencil holder is provided with an abutment having an opportunity. interacting with the substrate table at the position of its supports on the lower level guides, and catching (O C the stencil holder is installed with the possibility of their interaction with the nests of the substrate table at the position of its supports on the upper level guides. VI

Description

1 The invention relates to screen printing and can be used to apply a pattern on flat surfaces, including printing on substrates during the production of radioelectronic products using both mesh and bimetallic stencils. The purpose of the invention is to enhance operational capabilities and improve print quality by using both mesh and bimetallic stencils, as well as ensuring repeatability. FIG. 1 shows schematically the device, a general view; in fig. 2-5 device, sequential positions during operation The device comprises a base 1, a table 2 for placing the substrate 3, a stencil holder 4, a squeegee 6 and a stencil holder 4 matching mechanism 5 with a table 2, including catchers 7 mounted on the holder 4 , and sockets 8, made in table 2, as well as two-level copying guides 9 and 10 with biased rotatable elements 11 and 12. Table 2 is equipped with rolling bearings 13 connected to guides 9 and 10 of the alignment mechanism, and the holder 4 is provided with a stop 14, having the opportunity to interact ystvi from the table 2 at its position on the supports 13 on, channeling guides 9 of the lower layer. The catchers 7 have the ability to interact with the sockets 8 of the table 2 when its supports are placed on the guides of the upper level. A copying strips 15 are fastened over the pivoting elements 12 of the guides 10, and guides 16 are provided for moving the holder 4.

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6 4 92 The device operates as follows. In the initial position (Fig. 1), the table 2 is supported by the supports 13 on the lower level guides 9 in the leftmost (according to the diagram) position. Then the holder 4 with the stencil 5 is moved along the guides 16 to the right. In this case, the stop 14 begins to move the table 2, which with the supports 13 locates the pivoting elements 11 of the guides 10 and begins to simultaneously rise. When the table 2 is raised upwards, the catchers 7 enter the slots 8 and precisely fix the holder 4 with the stencil 5 relative to the table 2 and the substrate 3, and the catchers 7 move the table 2 away from the stop 14 and the further movement of the table 2 7, which makes it possible to improve the accuracy of combining the stencil 5 and the substrate 3 by selecting the gaps between the catchers 7 and the walls of the sockets 8 (Fig. 2). When the table 2 moves along the top level guides 10, the squeegee 6. is applied to the stencil 5 and the pattern is applied to the substrate 3. Then the squeegee 6 is retracted from the stencil, and the table 2 moves to the bottom guides 9 on the copier 15 . When this occurs, the separation of the table 2 and the holder 4 (Fig. 3). After table 2 is in the right extreme (according to the diagram) position, holder 4 is retracted to its original position, removing the new substrate 3-i from the table 2 and loading (figure 4). Then, the table 2 moves along the guides 9 to the B initial position (Fig.5), after which the cycle is repeated.

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Claims (1)

A screen printing device comprising a substrate table, a stencil holder, a squeegee, and a mechanism for aligning the stencil holder with a substrate table, including catchers mounted on the stencil holder, and sockets made in the substrate table, characterized in that , in order to expand operational capabilities .and improve print quality, the mechanism for combining the stencil holder with the substrate table is equipped with two-level copier guides located on the base with a spring By using rotary elements, the substrate table is equipped with supports associated with two-level copy guides of the alignment mechanism, the stencil holder is equipped with a stop with the ability. interaction with the table for the substrate when the position of its supports on the lower level rails, and the catcher of the stencil holder is installed with the possibility of their interaction with the nests of the table for the substrate when the position of its supports on the upper level rails. SU, „1173569 gz Figure 1 12 15 1 1173569 2