Open the mold control:
When the molten plastic is injected into the mold cavity and the cooling is completed, the product is removed as the mold is opened and the mold opening process is also divided into three stages: The first stage is a slow mold opening to prevent the workpiece from tearing in the mold cavity .
The second stage of rapid mold opening, in order to shorten the mold opening time.The third stage slow mold opening, in order to reduce impact and vibration caused by mold inertia.
Mold control:
Mold clamping is a huge mechanical thrust mold will be tightened in order to resist the injection molding process of molten plastic injection and filling the mold so that the huge mold opening force.
Close the security door, the switches are given the signal movement, clamping action immediately began. The first is to move the template to slow start, forward a small short distance, the original control of the slow switch lever block off, To move forward quickly.At the end of the close to the mold clamping mode, the other end of the lever pressed the slow switch again, at this time the movable plate turn slowly and at low pressure.
In the process of low-pressure clamping, if there is no obstacle between the mold, you can successfully close to the pressure on the high-pressure switch, high pressure is to straighten the machine hinge to complete clamping action.This distance is very short, usually only 0.3 to 1.0 mm, just turn the high pressure immediately reach the mold closing limit switch, then the action stops, the mold closing process is over.
The injection molding machine clamping structure has full hydraulic and mechanical link type. No matter what kind of structure, the last is the complete extension of the connecting rod to implement the clamping force. Connecting rod straight process is a movable plate and Tail plate propped up the process, but also four rod tension is stretched process.
The size of the mold clamping force can be obtained from the highest value of the mold clamping instantaneous hydraulic gauge, the maximum mold clamping force is high, and vice versa. The smaller injection molding machine is not Die hydraulic gauge, then according to the connecting rod straight to determine whether the mold is really tight.
If an injection molding machine when the connecting rod is very easy to straighten, or 'a little bit' can not be straight, or a few pairs of connecting rod in a not fully straightened, there will be plastic mold expansion, parts There will be flash or other problems.