Abstract: This specification discloses an improved fully automatic scraper grinder, which is modified from a conventional semi-automatic model. It comprises an emery wheel base, a set of upper and lower fine tuning devices driven by a motor provided thereon, and a set of front and back two-step displacement device driven by a cylinder. By incorporating a specially designed emery wheel with two different sizes of emery on the front and back, the emery wheel can provide a set of fully automatic grinding procedure that can first roughly grind then finely grind according to different scrapers using a digital control system so as to achieve a highly efficient automatic grinding. Furthermore, a worm type angle adjuster is provided on a scraper holder for adjusting the angle of the scraper holder, an automatic switching aspirator is provided on the emery wheel base for automatic switches to single sided air intake in the reciprocating motion of the emery wheel to remove the dusts produced by the scraper grinding.

Abstract: A slide mechanism for a cantilever type screen-printing machine and a driving mechanism for elevating the slide mechanism are provided. The slide mechanism includes an elevating mechanism and a transverse sliding assembly both including members formed from aluminum extrusions and therefore having high rigidity and strength. The transverse sliding assembly is vertically adjustably connected to a guide block through two small slide pairs connected between the transverse sliding assembly and the guide block, and the guide block is in turn connected to two big slides of the elevating mechanism. The driving mechanism includes a gear reduction motor, a driving bar of which is connected to the guide block in order to drive the transverse sliding assembly to stably move up and down along the elevating mechanism at high speed to achieve high precision printing in high efficiency.

Abstract: Disclosed is a PC board printing machine with cantilever-supported printing head and stencil holders and bi-directionalty movable printing table, and more particularly to a PC board printing machine which includes a cantilever mechanism, a motor dual-rail transmission mechanism, a exchangeable printing head and stencil cleaning lift-up mechanism, a simple stencil frame holder and dual-oil-cylinder stencil lifting mechanism, and an automatically bi-directionally movable printing table mechanism to produce high printing quality.