Screen printer and contraposition method for same

Abstract

The invention discloses a screen printer and a contraposition method for the same. The screen printer comprises a screen printer body; the screen printer body is provided with a computer and an XYtheta platform, wherein the computer is electrically connected with the XYtheta platform and can drive the XYtheta platform to move in the X-axis direction, the Y-axis direction and the theta-axis direction; a to-be-printed product placing part is arranged on the upper side of the XYtheta platform; the screen printer body further comprises a light source, a bracket and at least two CCD cameras, wherein the light source is arranged in the XYtheta platform; a light transmitting hole is formed on the edge of the to-be-printed product placing part on the XYtheta platform; the CCD cameras are mounted on the bracket; the camera shots of the two CCD cameras just face the light transmitting hole to enable light emitted by the light source to transmit the light transmission hole to reach the camera shots of the two CCD cameras; and signal output ends of the two CCD cameras are electrically connected with the computer. The two CCD cameras are adopted to conduct the contraposition. The screen printer has the advantages of simple structure, easiness in manufacturing, high contraposition speed and accuracy in contraposition.

Description

technical field [0001] The invention relates to the technical field of screen printing machines, in particular to a screen printing machine and an alignment method thereof. Background technique [0002] At present, precision flat-panel products such as touch panel glass, flexible circuit board, LCD liquid crystal panel, high-precision circuit board, TIO conductive film, light guide plate, mobile phone glass lens, notebook computer glass lens, etc. The product positioning of the screen printing machine has very high requirements, most of which require the error to be controlled within 0.1mm. [0003] In the prior art, a screen printing machine includes a computer processing module, a screen printing module, an alignment module, and an XYθ working platform. The product to be printed (such as touch panel glass) is first aligned in the alignment module, and its alignment information It is sent to the computer processing module, and then the computer processing module controls t...

AI Technical Summary

Problems solved by technology

In the above-mentioned technological process, because the alignment method of the alignment module widely adopts the traditional standard pin / positioning hole mechanical alignment method, that is, inserting the positioning pin into the positioning hole on the substrate during alignment, due to this alignment The positioning method is easily affected and restricted by many technological factors such as the machining accuracy of the positioning hole, the position accuracy of the positioning hole and the image, which makes the positioning accuracy limited, and it is difficult to meet the requirement of error control within 0.1mm

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