Repair of burr defects:
When burrs appear on the surface of the mold, this not only affects the appearance quality of the product, but also may affect the precision and service life of the mold. In this case, the preferred method is to use a grinding wheel for fine grinding to completely remove the burrs. If the burrs are large or stubborn, you can also use a pneumatic shovel to remove them, but be careful not to damage other parts of the mold during operation.
Repair of upper mold damage or pits:
For cases where the damage to the upper mold of the colored tile mold is not too serious, or when pits appear on the surface of the cement tile machine mold but do not affect the overall structural strength, you can consider re-forging it in a new mold and restore the mold to its original shape and precision through high temperature and high pressure. If the damage is relatively minor, you can also use repair welding to repair it locally. After repair welding, you need to grind and polish to ensure the flatness and smoothness of the mold surface.
Repair of underpressure (underforging):
Underpressure problems are usually caused by insufficient or uneven pressure on the die during the forging process. In this case, the die can be pre-processed in the machining workshop, such as turning, milling, etc., to remove excess metal and correct the shape of the die. However, it should be noted that such underforged forgings should not be forged again, because re-forging may press the newly generated oxide scale into the forging, forming irreparable waste. For unimportant dies, you can try to reheat them once, using high temperature to oxidize the excess metal into a skin and fall off, but this method has limited effect and should be used with caution.
Repair of misaligned tile dies:
Misalignment is caused by the displacement of the position of the die during assembly or use. For tile dies with less serious misalignment, you can try to correct it by re-forging; if the misalignment is more serious and cannot be solved by re-forging, you may need to replace a new die. For dies with less serious misalignment, grinding can also be used to correct their shape and position.
Repair of deformation:
Colored tile dies may deform during use due to uneven force or temperature changes. For deformed dies, they can be corrected by heating them to the forging temperature, and the high temperature can soften the die material and restore the original shape. In addition, using a press to correct them in a cold state is also an effective method, but it is necessary to control the pressure and the direction of correction to avoid further damage to the die.
Overheating repair: Overheated dies may have problems such as coarse structure and reduced performance. In this case, normalizing treatment can be used for correction. Normalizing treatment can refine the grains, eliminate internal stress and improve the comprehensive performance of the material. If the hardness of the forging is too high or the toughness is insufficient, repeated heat treatment can be used to further adjust its performance.
Treatment of serious defects: For dies with defects such as overburning, interlayer, quenching cracks and serious unqualified appearance, these are all post-waste and cannot be effectively repaired. Therefore, when these defects are found, they should be stopped and replaced with new dies immediately to avoid greater impact on production. At the same time, it is also necessary to conduct in-depth analysis of the causes of these defects and take corresponding measures to prevent similar problems from happening again.
