How is the positioning operation of injection molding machine
One of the procedures in the injection molding process of the injection molding machine is the mold closing. Precise positioning of the mold can produce qualified plastic products. If the injection molding machine clamping mold positioning is not correct, that can be trouble. So injection molding machine manufacturers want you to understand the process of mold closing. In this way, we can immediately see whether there is anything wrong in the process of mold closing, so as to deal with it in time.
Clamping is a huge mechanical thrust to close the mold, in order to withstand the injection process of high-pressure injection of molten plastic and fill the mold and the great opening force of the mold.
Close the safety door, each stroke switch will give the signal, the mold closing action will start immediately. First, the moving template starts at a slow speed. After advancing for a short distance, the control lever pressing block that originally presses the slow switch breaks away and the moving plate turns to push forward quickly. In advance to close to the end of the mold closing, the other end of the control lever pressure rod pressure on the slow switch, at this time the activity plate and turn to slow and low pressure forward.
In the process of low-pressure die closing, if there is no obstacle between the molds, it can be successfully closed to press the high pressure switch, the high pressure is to straighten the hinge of the machine to complete the die closing action. This distance is very short, generally only 0.3~1.0mm. As soon as the high pressure is turned, the stop limit switch for mold closing will be touched. At this time, the action stops and the mold closing process ends.
The mold closing structure of injection molding machine has full hydraulic type and mechanical connecting rod type. Either way, the clamping force is carried out by the full extension of the connecting rod. The stretching process of the connecting rod is the process of the movable plate and the tail plate being supported, and also the process of the four pull rods being stretched by force.
The size of the clamping force can be known from the moment when the oil pressure gauge rises. The high value of the oil pressure gauge is high, and the opposite is low. The smaller injection molding machine is not with the oil pressure gauge, then according to the stretching of the connecting rod to determine whether the mold is really close.
We are here to remind you that if the injection molding machine can easily extend the connecting rod when the mold is closed, Or “by a hair’s length,” or one of the links is not fully extended, When injection molding, there will be expansion of the mold, the parts will appear on the edge or other defects.
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