DE8007545U1 - ADJUSTMENT DEVICE ON A SCREEN PRINTING MACHINE - Google Patents

Description

SIEMENS AKTIENGESELLSCHAFT Our mark Berlin and Munich VPA QQ ft? O 2 1 QE

Adjustment device on a screen printing machine

The innovation relates to an adjustment device on a screen printing machine.

To save on tin-solder, the conductor tracks are only coated with tin-solder on the soldering eyes. This The method is made possible ^ that solder stop covers in the screen printing process on the print material, such as. Legs printed circuit board.

With a fine grid and large formats, it is difficult to transfer the stencil image onto the print material without a print offset, such as B. to transfer a circuit board. If the adjustment of the stencil printing material is not carried out properly, When printing Ladt is printed on the soldering eyes, so that they can no longer be soldered or can only be soldered with difficulty. With conventional The template is applied to the material to be printed using paper prints or prints on transparent foils empirically oriented. Only after printing can it be determined whether the print offset, which is usually not entirely avoidable is so large that the material to be printed can no longer be used for the intended purpose. It must then either thrown away or relieved of pressure by solutions, which in both cases leads to prolongation of the operation and thus leads to considerable expenses.

The task of the present innovation is to provide a device for simple position checking or adjustment of the To create screen stencils for printing on screen printing machines.

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To solve this problem, the adjusting device is designed according to the innovation such that above the SiebdrucktisclBs a first rod is attached, the About a sliding head with a second to the first rod perpendicular and to the Siebdruckti saw parallel movable Linkage is connected and that a measuring microscope is attached to the second linkage.

With these measures it is possible to make the adjustment to carry out the actual printing process by measuring. As a result, the adjustment is considerably simplified and an existing one Misalignment is detected before the board is printed. The scrap due to misalignment is thereby prevented. Due to the special suspension of the measuring microscope, it can move in both coordinate directions the entire screen printing table can be moved.

The innovation is explained in more detail using the figure. A screen printing machine is shown in the figure. The print material 6 is placed on the screen printing table 1. About dan screen printing table 1, a linkage 2 is mounted, which consists of two parallel pipes, which as

Serve guide rails, consists, and that via the sliding ° connected lsx,

head 3 with a further linkage 4, / which is also made up of two parallel pipes. The linkage 4 is guided like the linkage 2 in the sliding head. The linkage 4 can be moved perpendicular to the linkage 2 will. A measuring microscope 5 is then attached to the linkage 4. With the help of this measuring microscope 5 it is possible to determine whether the stencil has been used to coincide with the print material. A possible offset Before printing, the stencil and print material can be adjusted using adjustment devices 7, which are attached to the screen printing table 1 are to be corrected. Both the measuring microscope and the sieve table can be used in both Move coordinate directions. 1 figure

1 right to protection

Claims (1)

It »· t -3- VPA protection claim, 80 G 2 O 2 I OE 1. Adjusting device on a screen printing machine, characterized in that above of the screen printing table (1) a first linkage (2) is attached, which via a sliding head (.3) with a second rod (4) which can be moved perpendicularly to the first rod and parallel to the screen printing table is connected and because a measuring microscope (5) is attached to the second linkage is.