External Double Ejection Systems Designed to Control Sequence of Plate Openings

CUMSA introduces external double ejection systems, the EX, EY and EZ. The double ejection systems were designed to control the sequence of double ejections or plate openings. Each type controls the travel determined by the customer to stop at the selected plates in a locked position while the other plates continue to move. The systems are adaptable to a variety of medium and large molds sizes. They also provide benefits such as completely external set up and simple maintenance, easy installation, robust and reliable units, and four different rod diameters of 14, 20, 32 and 50 mm.

The EX model was designed to be used in pre-opening plate movement of the mold, as well as a double ejection system, controlling two sets of ejector plates when the machine actuates the upper ejector plates set. The first opening is customizable up to 250 mm for the two smaller EX sizes and up to 375mm, in the two larger sizes. The second opening is completely free, as the system will keep the lower set locked until the upper plate returns to its original position.

The EY model was designed for molds where the upper set of ejector plates are separated and the machine actuates the lower set of ejector plates. The upper set stops at the core plate, and the rear plate continues to travel until it reaches the upper plate. The EY can customize the first opening from 30 to 80 mm.

The EZ model was designed to enable synchronized mold plates openings, regardless of location. Once the first stroke is defined, the selected plates will open at the same time and then the rest of the mold will open freely. The first stroke is customizable up to 250 mm for the two smaller sizes and up to 375 mm in the two larger sizes. The second movement is free.

Extension rods for all three models are available and were designed to enable the use of the external double ejection systems in taller molds.