There are generally three types of quick mold clamping systems for injection molds: electromagnetic clamping systems, hydraulic clamping systems, and mechanical manual clamping systems. The characteristics of each quick mold clamping system determine their scope of application.
1. Electromagnetic clamping system
1. The electromagnetic clamping system is suitable for injection molding machines with a clamping force of 300 to 350 tons. Below this level, there will be insufficient mold surface area to ensure sufficient clamping force.
2. The main advantage of the electromagnetic system is that there is no need to modify the mold and no special backplane. The system can accept any shape of backplane.
3. The electromagnetic clamping system can be quickly installed and run quickly, almost maintenance-free, without the need to replace the transfer parts.
4. Electromagnetic clamping system is the lowest cost option commonly used in quick clamping applications.
2. Mechanical manual clamping system
Mechanical manual clamping system, the mold is fixed in position by manual bayonet, this only applies to 250 tons of injection molding machine. This type is a low-cost system that is relatively easy to install. Almost all injection molding machines can be assembled.
3. Hydraulic clamping system
The hydraulic system is suitable for any size injection molding machine. Single-acting or double-acting hydraulic clamps comply with EUROMAP standards and can be used for automatic clamping of existing and new machine molds. The fixture acts on a steel mold back plate, and the mold is bolted to the steel back plate.
Compared with the mechanical manual clamping system, the hydraulic clamping system requires larger changes to the mold. In addition, the size of the backplane is crucial for effective locking. The backplane must be permanently fixed with each mold, which greatly increases the total cost of such clamping systems.
The hydraulic system installed on the injection molding machine may not be sufficient to support the mold clamping system, and often requires frequent upgrades before installation.
Now more and more injection mold manufacturers will try out before installing the clamping system. The actual installation of the system is usually left to their customers to make choices to match the specific applications involved. The installation cost of the hydraulic clamping system is low and very simple, but the mold system needs to be updated and upgraded, and the new universal size panel may be extremely expensive.
For injection molding machines over 250 tons, manual mechanical systems are difficult to withstand mold opening forces over 25 tons (assumed to be 10% of the clamping force). For such applications, the best choice is between a hydraulic clamping system and an electromagnetic clamping system.