How many types of injection molding machines are there?What are the characteristics of each?
The structure types of mold closing device of injection molding machine include: hydraulic mold closing structure, hydraulic - mechanical mold closing structure, hydraulic - elbow mold closing structure and electric mechanical mold closing structure.
(1) structural characteristics of hydraulic mold closing device
The moving stroke of the template has a large opening distance, and can be injected into the molding of high size parts.
The clamping force of this mould is obtained by adjusting the pressure of hydraulic oil, and the size adjustment of this mould clamping force is convenient.
Press template stroke adjustment work is more convenient and simple.
The shortcomings of hydraulic pressure bonding structure are: high power consumption in injection work, oil leakage in oil pipeline louie, poor stability of hydraulic oil working pressure.
(2) structural characteristics of hydraulic - mechanical mold closing device
The diameter of the hydraulic cylinder is small, reducing the weight of the equipment, saving energy consumption and using less hydraulic oil.
(2) by two different diameter of the cylinder and the mechanism of cooperation (small diameter cylinder complete mould removed and closing action and mechanical devices meet locked position, and then by the large diameter cylinder pressure fastens its mold), can obtain high clamping force, clamping reliable work.
Problems: hydraulic and mechanical mold combination structure is complex, which makes the maintenance of equipment more difficult.
(3) the structural characteristics of the hydraulic-elbow mold closing device
Hydraulic - bent elbow type clamping device is also a kind of actual hydraulic mechanical clamping device, the difference is mechanical part is the linkage or bent elbow strut mechanism, when the clamping system by clamping device of prestressed and make the mold close tightly.As its driving force is provided by hydraulic device, the structure is called hydraulic - elbow mold closing device.Its structural features are as follows.
The larger clamping force is obtained through the enlargement of the connecting rod mechanism by a small hydraulic thrust force.
Thus, the molding cycle of the injection products is shortened due to the high speed of handling the mould.
Torque USES less hydraulic oil and saves energy.
To lower the manufacturing cost of injection parts.
(4) structural characteristics of electromechanical mold closing device
No hydraulic oil is involved in the work of the mold closing mechanism. Ac servo motor is used to drive the mold closing motion, which is accomplished by ball screw and synchronous belt driving mechanism.
Vacuum cleaner is not driven by hydraulic oil, and the working environment is easy to keep clean.
Gas saves a lot of cooling water for hydraulic oil cooling.
To economize on energy consumption.
Transaction makes less noise.
The maintenance and repair of the equipment is relatively simple.