The guide post slides and cooperates in the guide sleeve, and the purpose is to ensure the correct combination between the core and the cavity parts when the mold is fixed and fixed, so as to ensure the quality of the molded product. Therefore, in order to make the working position of the guide post and the guide sleeve work correctly, attention should be paid to the corresponding precision of the position of the mounting hole of the guide post and the guide sleeve. That is, the center line of the two holes should be perpendicular to the combined plane of the moving and fixed molds. Moreover, the two center lines should coincide with the center line after the combination of the two parts, so that the sliding column and the guiding set do not produce sliding interference when they are matched.
The processing of the mating hole should be prioritized on the coordinate boring machine. If there is no such equipment, the drilling can be processed by the tongs. This is more difficult.
There are two options for the processing sequence of the holes. One is before the cavity is machined; the other is after the cavity is machined. The choice of the two processing schemes is mainly determined by the combination of the two mold halves. If the core and the type of glue (ie, the convex film and the Sichuan mold) are matched with the positioning part to ensure accurate positioning of the matching mold, the forming part and the positioning part of the two mold halves are first processed, and then the guide post is processed. Set of mounting holes. If the two mold halves are not clamped, the mounting holes of the guide post and the guide sleeve should be machined first. The processing sequence of this party is as follows.
The end faces of the mold are first milled or planed. The clamping joint surface of the two mold halves should be finished to the size of the figure, and the roughness R of the two planes should be no more than 0.63 μm.
The two mold halves are clamped together in the position after the mold clamping (if there are matching parts in the middle), then the mutually perpendicular planes are milled or planed, and the shape of the mold is processed to the paper size.
The fitter is first drawn (draw the cavity, the core and the positioning, the position of the guide post and the guide sleeve)
The cavity and the mounting holes are machined on the trampoline to the paper size.
Finishing the cavity molding surface.https://www.xhychromerod.com/