Injection molding machine structure
Release Time：
2008-11-11 12:53:23
Friends of the plastic: injection molding machine by system, usually including the clamping system, injection system, heating and cooling systems, hydraulic systems, lubrication systems, control systems, protection systems. In injection molding machines, the clamping system and injection system is the most important part.
The main role of clamping device is to achieve mold opening and closing movements to ensure the reliable closure of the molding die and prolapse products. It is mainly composed of front and rear fixed formwork, moving template, tie rod, mold clamping cylinder, shift cylinder, connecting rod mechanism, mold adjusting device, product ejecting device and safety door.
According to provide clamping force mode, clamping device can be divided into mechanical clamping mechanism, hydraulic clamping mechanism, hydraulic mechanical clamping mechanism three categories.
(1) mechanical clamping mechanism is an early mode-locking mechanism, mainly the use of motor gear drive to mold, its self-locking performance, but its regulation complex, inertial impact, so there are few manufacturers And use. However, due to the development of electromechanical industry, the emergence of servo motor and "magnetic drive" device to drive the clamping mechanism, to overcome the above shortcomings.
(2) hydraulic clamping mechanism has a direct-acting, fluid-filled and pressurized pressurized sub-type.
① liquid-filled regulator clamping device. Mold clamping, the pressure of oil into the first set in the center of the mold clamping cylinder moving cylinder of small diameter mold, to achieve rapid mold closure. During the clamping process, the filling valve is opened and the piston of the clamping cylinder is rapidly advanced under the action of the small oil cylinder pressure. At this time, a negative pressure is formed in the clamping cylinder. A large number of hydraulic oil into the clamping cylinder, when the mold is closed, the clamping cylinder connected to high-pressure oil, the clamping force quickly increased to the required clamping tonnage.
Open mode, from the right side of the clamping cylinder into the oil, the vertical axis of the cross-section is a ring, small volume, it can achieve rapid open mode.
② liquid-filled pressurized clamping device. Mold clamping, the pressure of oil into both sides of the small diameter, long-stroke fast moving cylinder, with the moving block and plunger mold clamping cylinder forward. At the same time, the formation of negative pressure clamping cylinder, filling valve open, the oil cylinder to their own oil. As the fuel tank is located in the upper part of the clamping device, to facilitate self-inflow of oil to speed up the oil filling rate.
When the mold is closed, the filling valve is closed, the pressure oil into the pressurized cylinder, the clamping cylinder pressurized oil. Due to the large diameter of the clamping cylinder, in the role of high-pressure oil, to achieve sufficient clamping tonnage.
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