1. hot curved glass blast open in the stove, in view of this question, may carry on the analysis from following several aspects.
(1) pair enters in front of the stove the glass to carry on the inspection, side looked whether there is explodes the mouth and explodes the phenomenon.Cuts in the glass cuts with the edging time must request:①When edging does not allow to have the exposed side phenomenon, falls the angle phenomenon regarding the glass corner, falls the angle damage to be small, after the repair is not obvious, must carry on the repair;②Falls the angle damage to be big, is unable to repair does not permit the existence;③Nearby cutting connection place must be smooth, permits not sufficiently leaves leeway the lump to break out the phenomenon.
(2) glass when formation uses drag roll.Some radius of curvature big product, when glass formation depends upon the gravity to be unable completely to achieve the request the curvature and the spherical surface, must borrow the drag roll.The drag roll must use the glass cloth and silk to carry on the package completely, when with glass contact if the exposed metal with the glass contact, can create the glass directly in the stove stave.Moreover, if in the glass cloth and silk which the drag roll twines the adherency has Shui Jihuo the water drop, when presses the glass also can create the glass in the stove stave.
(3) use hollow mold, middle the glass in enters in front of the stove not to have supports, when the glass size is specially big, easy to create the glass in the stove stave.Therefore time use hollow mold middle the glass must carry on the support.
(4) glass in stove elevation of temperature speed excessively quickly, easy to cause the glass to be heated non-uniform appears glass blasting open.
(5) when glass formation, assists the formation the external force oversized, causes the glass blasting open.Regarding some radius of curvature big product, the glass must depend upon the assistance external force to be able to become the fitting mold.But the operator must understand that, the glass formation must mainly depend on the temperature the adjustment to meet the requirements.
2. glass the foreign films fold in the difference
oversized solution glass the foreign films to fold the difference question, mainly carries on the control to two aspects, on the one hand is the glass cuts cuts, on the other hand is the hot curved curvature.To folds the difference the control to have to pay attention to following several aspects:
(1) cuts when the product trial-manufacture stage glass cuts, may inside and outside a glass cut the size which cuts to be same, when trial manufacturing the hot curved goodness of fit and the spherical surface achieved when request in, must survey the foreign films glass to fold the difference, folds in piece the difference size to write down precisely, establishes in the technological document.
(2) glass cuts with the cutter when cuts, according to in piece cutting graph and the survey folds the difference size to design the foreign films the cutting graph; If the glass cuts for the manual template cuts, best uses an in piece the template to cut cuts the glass in foreign films, because the hand-planted in foreign films cut cut the template more or less existence difference, a template cuts cuts may avoid these differences, moreover, must add the rice quantity to mark on the template, in order to avoid makes a mistake.
(3) appears regarding the old product folds the difference question, must consider the personnel cuts cuts (in view of cuts manually cuts) and the flexivity, the human factor to folds the difference the influence to be very big, when specially manual cutting, each person's under knife grasps is dissimilar, toward lives the glass size which the different person cuts not to be dissimilar, the existence error, can create the glass to fold difference exceeding the allowed figure.Moreover, the hot curved curvature change also can affect to in foreign films glass folds the difference.
(4) has the very big spherical surface glass regarding the hyperboloid about, cuts to the foreign films cuts the direction all to need to carry on with the above-below direction in the size adds the rice, uses a template to cut manually cuts very difficultly to satisfy this kind of Canadian rice request, this product is best using the cutter carries on cuts cuts.
(5) glass when lays aside to the mold on, after first lays aside the foreign films to lay aside the piece, in the piece lays aside on the foreign films the position must come between also put positively, in the piece middle line and the foreign films middle line must superpose in, otherwise also can create the foreign films to fold the difference.