Transmission mode of mold clamping device of bottle blowing machine

May 06, 2022

The transmission mechanism of the mold clamping device of the Bottle Blowing Machine is mainly used for closing and opening the mold and applying sufficient clamping force. It includes two types of direct pressure type and elbow type. The transmission modes include mechanical transmission, hydraulic transmission, pneumatic transmission, etc.

1. Mechanical transmission

The mechanical transmission is a mechanical transmission that drives the template with a screw rod to complete the opening and closing of the mold. There are two types of single-die and double-die clamping machines, which have simple structure, convenient manufacture and maintenance, and low price, but there are slow opening and closing speeds, uncontrollable transmission speed, small mechanical self-locking clamping force, and loud noise during operation. and other shortcomings.

2. Hydraulic transmission

Hydraulic transmission clamping device has direct pressure type, toggle type and so on. It has the characteristics of fast mold clamping speed, stable template movement, and large mold clamping pressure. When using proportional valve to control the template movement, it can accurately control the template to open and close the mold at different moving speeds, and achieve the maximum mold clamping in a short period of time. force. The disadvantage is that the valve body and hydraulic device are easy to leak oil, and improper maintenance or maintenance will pollute the operating environment. It is suitable for the production of various types of hollow blow molding products.

3. Pneumatic transmission

The pneumatic transmission clamping device has many features of the hydraulic transmission clamping device. It can use the compressed air for inflating the parison, without the need for another power source, and the working environment is clean. However, the pneumatic transmission has higher requirements on the quality of the compressed air, and the compressed air must be dry, clean, and oil-free; when the mold is opened and closed by air pressure, it will generate a large impact force and make a large noise. It is suitable for the production of various types of extrusion blow molded containers.

4. Electric motors and electromagnets

A new type of mold clamping device is provided with an electric motor and an electromagnet. By driving the rotary motor, the link mechanism is stretched and retracted, and the movable platen is moved forward and backward, so as to realize the action of closing and opening the mold; after the mold is closed, the electromagnet is driven to generate an attractive force, so as to perform mold clamping. In this way, no bending moment acts on the movable platen, no strain occurs on the mold mounting surface of the movable platen, and the clamping force can be easily controlled.

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