The clamping force of die-casting machine is the force applied to the mold during the die-casting process to prevent it from expanding under high pressure.
The clamping force is usually expressed in unit kilonewtons (KN).
The function of the clamping force is to overcome the back pressure (also known as bulging force) generated by the mold during the filling process, to ensure that the parting surface of the mold will not separate, thereby ensuring the dimensional accuracy and internal quality of the casting. The clamping force is one of the important parameters for measuring the performance of die-casting machines.
It is a key indicator of the size of the die-casting machine, and different models of die-casting machines have different ranges of locking forces. The size of the locking force depends on various factors, including the size, shape, wall thickness, gate form, and mold structure of the casting.
How to calculate the clamping force
An important task in selecting a die-casting machine based on the die-casting product is to calculate whether the clamping force of the die-casting machine meets the requirements. The clamping force of the die-casting machine must be greater than the expansion force generated by the product during die-casting and reserve a safety factor.
The usual calculation method for the expansion force is to multiply the projection area of the metal pressure bearing part on the mold parting surface by the die-casting specific pressure. The clamping force and expansion force of the die-casting machine must meet the requirement of F-lock ≥ KF in the expansion type – the main expansion force of the product (N); K – Safety factor, generally taken as 1.15.
In actual production situations, when selecting a die-casting machine to calculate the clamping force, attention should be paid to whether the parting surface position is special, the size of the slide core projection area, and the deviation between the injection force center and the equipment center.
Haichen technical parameters- clamping force of die-casting machine
Haichen cold chamber die casting machine
Haichen hot chamber die casting machine
Haichen die casting machine
Haichen machinery produces high-pressure die casting machines. It includes both cold chamber die casting machines and hot chamber die casting machines. They have highly durable and precise features.
Conclusion
When selecting a die-casting machine based on the clamping force. The clamping force of die casting machine must be considered together with the specific process structure of the product’s mold. It is recommended not to produce under conditions where the expansion force is greater than the clamping force of the die-casting machine, otherwise, there will be a risk of material flying, and the dimensional accuracy and quality of the product are difficult to guarantee. At the same time, it will aggravate the wear of the moving parts of the die-casting machine, and the service life of the die-casting machine will also be greatly damaged.
