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How To Choose A Quick Mold Clamping System For Injection Molds?
Jun 28, 2018

Core Tip: Rapid die change system is an important part of lean production for injection molding companies, and choosing the best rapid die change solution is of utmost importance. In order to increase production efficiency, companies will often try to reduce the die replacement time by using quick die change joints, installing combination boards and automatic die change devices, and frequently preheating workstations. Ultimately, investment in new rapid locking systems will be considered.

   Existing clamping technology is generally divided into three categories: mechanical manual clamping systems, hydraulic clamping systems and electromagnetic clamping systems. The differences in the characteristics of the three systems determine their respective application areas. Stäubli, an expert in mold attachment and clamping systems, produces the above three types of clamping systems and has the ability to select the products and solutions that are most relevant to their needs for a wide range of applications.


Mechanical manual clamping system


The mechanical manual clamping system is maintenance-free, and the mold is manually locked by a mechanical bayonet, usually for injection molding machines up to 250 tons and mold applications within 2 tons.


When the user applies the system, the center ring of Stäubli must be used to replace the original center ring. Therefore, a set of notches and threaded holes for mounting the center ring must be processed on the mold; The corresponding mechanical manual clamping system shall be installed on the plate or fixed plate, and then the clamping and loosening of the mold shall be performed through a mechanical bayonet wrench. No power and hydraulic power are needed during operation, and operation is very simple.


Hydraulic clamping system


The hydraulic system is suitable for almost any tonnage injection molding machine. The hydraulic clamp unit is divided into two types: single action and double action. The hydraulic clamp is fixed on the moving plate or fixed plate of the injection molding machine, and the clamp unit is used to clamp and release the back plate of the mold to achieve the loading and unloading of the mold.


Some conventional types of hydraulic clamps require hydraulic pressure keeping during clamping. During this process, leakage of the pipeline may occur, causing the clamp to loosen, causing accidents. Stäubli's hydraulic grips have the advantage in this respect. They are mechanically self-locking during clamping and can guarantee maximum safety during application.


More and more injection molding machine manufacturers today will conduct trials before installing the clamping system. The actual choice of which system to install will usually be left to the end user to make a choice, which will better suit the particular application involved. The hydraulic clamping system has a low installation cost and is easy to operate, which is the advantage of this system. One thing to note is that when the mold system needs to be updated and upgraded, purchasing new universal sized panels can be extremely costly.


Electromagnetic clamping system


For a full range of injection molding machines, injection molding machines as small as 50 tons and larger than 4,000 tons, the electromagnetic clamping system can be perfectly applied. The main advantage of the electromagnetic system is that there is no need to modify the mold, no special backplane, and the system can accept any shape of backplane. The electromagnetic clamping system can be quickly installed and operated, almost free of maintenance, and no need to replace the transfer parts. Electromagnetic clamping systems are the lowest cost option for fast clamping common applications.