The fast cylinder plays the role of fast mold transfer in large injection
molding machines. Because the length is relatively long, the screw type is
generally used. Due to the high speed of operation, the straightness of the
cylinder and the surface of the piston rod are relatively high, and the piston
rod is processed at high frequency.
| Cylinder name | Bore range | Travel range | Rated pressure (Mpa) | Installation method |
| Fast oil cylinder (thread type) | 63～190 | 1100～4800 | 25 | Hinge type + universal bearing |
1. Tie rod type, the front and rear covers are fixed by a tie rod. Limited by
the tie rod, it is generally suitable for small oil cylinders. Although the wall
thickness is the thinnest, under the same specification, the external dimensions
will be too large, and the space waste is serious.
2. Bolt type, the front and rear covers and the cylinder barrel are connected
by bolt groups. The required thickness of the cylinder is the largest, and the
raw materials are relatively wasteful. Generally suitable for large
cylinders.
3. Threaded type, the front and rear covers and the cylinder barrel have
large threads, and are connected by threads. The required thickness is smaller
than the bolt type, but it is still thicker, and a large nut is required to
ensure the assembly direction. Generally suitable for large long cylinders
4. Welding type, the back cover and the cylinder are welded into a whole, the
wall thickness of the cylinder is relatively thin, and the whole is relatively
compact. The material cost is not high, but the processing is the most difficult
and the processing cost is the highest.
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