Opening and closing control of injection molding control

As a PVC Plastic Tube Core Manufacturer, share with you.
Opening control:
When the molten plastic is injected into the mold cavity and after cooling is completed, the product is taken out as the mold is opened. The mold opening process is also divided into three stages. In the first stage, the mold is opened slowly to prevent the part from tearing in the cavity.
The second stage opens the mold quickly to shorten the mold opening time. The third stage is to open the mold slowly to reduce the impact and vibration caused by the inertia of the mold.
Mold clamping control:
The mold clamping is a huge mechanical thrust to close the mold to resist the huge opening force caused by the high pressure injection of molten plastic and filling the mold during the injection molding process.
When the safety door is closed, signals are given by each of the travel switches, and the mold clamping action starts immediately. The first is that the moving template starts at a slow speed. After advancing a short distance, the control lever pressing block that originally held the slow switch is disengaged, and the movable plate is turned to advance rapidly. When advancing to the end of the mold clamping, the lever on the other end of the control lever pressed the slow switch again, at this time the movable plate turned to slow speed and low pressure.
During the low-pressure clamping process, if there are no obstacles between the molds, you can smoothly close it until the high-voltage switch is pressed. This distance is very short, usually only 0.3 ~ 1.0mm. When the high-pressure screw is turned, it will touch the mold clamping end limit switch. At this time, the action stops and the mold clamping process ends.
                                                                                           
                                                                                                                                                        PVC Packing Plastic Tube Core
The clamping structure of the injection molding machine has a full hydraulic type and a mechanical link type. No matter which type of structure is, the connecting rod is fully straightened to implement the clamping force. The straightening process of the connecting rod is a process in which the movable plate and the tail plate are stretched, and it is also a process in which the four tie rods are stretched by force. We have PVC Packing Plastic Tube Core on sale.
The magnitude of the clamping force can be known from the highest rise of the oil pressure gauge at the moment of clamping. When the clamping force is large, the highest value of the oil pressure gauge is high, otherwise it is low. The smaller injection molding machine does not have a mold clamping oil pressure gauge. At this time, it is necessary to determine whether the mold is really tight according to the straightening of the connecting rod. If the connecting rod is easily straightened when a certain injection molding machine is closed, or "almost" fails to straighten, or if one of the several pairs of connecting rods is not completely straightened, the mold will expand during injection and the product will Flashing or other problems can occur.
Causes and countermeasures of mold fouling after injection of engineering plastics.
When we can't eliminate the mold scale using various measures, we must strengthen the maintenance and maintenance of the mold.
Mold scale is easier to remove at the initial stage of mold formation, so the mold cavity and exhaust passage must be cleaned and maintained regularly (for example, after each batch of molding production). Without mold maintenance and maintenance for a long time, it is very difficult and time-consuming to remove thick mold scale after the mold is formed.
The main sprays used for injection mold maintenance and repair are: release agent, rust inhibitor, thimble oil, glue stain remover, mold cleaning agent, etc.
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