Injection molding machine open moldclamping control clear,order to ensure safety
2018-06-12 07:12:44
Model control:
When molten plastic is injected into the mold cavity and cooled down, the product is removed as the mold moves. The opening process is also divided into three stages. In the first stage, the mold is slowly opened to prevent the workpiece from being torn in the mold cavity.
The second stage is to open the mold quickly to shorten the opening time. The third stage slowly opens the mold to reduce the impact and vibration caused by the inertia of the die. Mode control:
The mold is a huge mechanical thrust to tighten the mold to resist the high pressure injection and filling mold of the plastic injection molding process, so that the huge opening force of the mold.
Close the safety door, all the trip switches give the signal, and the clamping action starts immediately. First, the moving template is started at a slow speed, and after a short and short distance, the control rod press block is separated from the slow switch, and the movable plate is moved forward quickly. When advancing towards the closing end, the other end of the control lever presses the slow switch, and the movable plate moves slowly and at low pressure.
In the process of low pressure clamping, if there is no obstacle between the mold, it can be successfully closed to the high pressure switch, and the high pressure is for the straightening machine hinges to complete the clamping movement. This distance is very short, generally only 0.3~1.0mm, just turn to high pressure will immediately touch the clamping stop limit switch, then the action stops, the closing process ends.
The clamping structure of the injection molding machine is full hydraulic and mechanical link type. Regardless of the structural form, the clamping force is finally achieved by straightening the connecting rod completely. The straightening process of the connecting rod is the process of stretching the movable plate and the tailboard, and is also the process of drawing the tension of the four pull rods.
The size of the clamping force can be obtained from the instantaneous increase of the oil pressure gauge of the closing die, and the highest value of the oil pressure gauge is high when the clamping force is large, otherwise it is low. A smaller injection molding machine does not have a die gauge. At this point, it is necessary to judge whether the die is really tight according to the extension of the connecting rod.
If the connecting rod is easy to straighten, or "a little bit" fails to straighten a certain injection machine, or a pair of connecting rod is not completely straightened, the mold will appear when the injection molding is injected, and the parts will appear flfei or other faults. Article links: China Plastics Machinery Network http://www.86pla.com/news/detail/50638.html
