Tryout Press Guide
A tryout press is a machine used for die sampling/testing. The die sampling/testing process is the primary stage as the die is loaded to the press machine for the first time to test its performance. One of the obliged steps is tuning. Tuning is a time-consuming step given that it involves a series of corrective work and adjustments. In short, die sampling/testing improves tool quality and efficiency and the tryout press plays an essential role in this process.
Why is the Tryout Press Necessary?
It is fair to say that the tryout press is the key to a successful testing process as it determines the accuracy of the process. Based on the type of tooling the press is going to test, the setup, the adjustment of the machine, and the type of press that is used all influence the testing results. With the right tryout press, the time spent in die construction can be saved. The benefits of the tryout press are listed as follows.
Programmable speeds and forces
Return slide possible at any time during the operation
The joystick allows you to gently control the movement of the slide
Full rated capacity available across the entire stroke
Simple adaptation to different die heights
Double and single-sided operation at the touch of a button
The possibility to program speeds and forces is fundamental to a die tryout press. The pressing force of a tryout press is categorically lower than that of a production press. The reason is that the former is used to inspect the dimensions and contact surfaces of a die/mold instead of creating one. In this essence, the guidance of the ram and its stopping accuracy is valued more than its speed.
Tryout Press, Hsin Lien Sheng
Construction
The press machine for production purposes can be categorized into two types based on their structure: the straight side press and the C-frame press. The die tryout presses belong to the straight side presses because the design allows minimal deflection for off-center loads. The major components of a tryout press include the frame, the ram, the bolster, and a drive source.
The ram and the bolster (or bed) are where the die halves are mounted. They are built with extra stability compared to the regular press machines since precision is the key requirement to such a machine. To further improve its stability and precision, there are often 4 (sometimes 8 or more) guideways on the machine frame. These machines are typically servo-driven hydraulic (or mechanical) presses.
Servo-driven System
A servo-driven power source is indispensable to a die tryout press. The servo-driven system refers to the power source that has the output force controlled by the servo motor. The servo motor enables the accurate control of force, speed, and stroke of the ram from the hydraulic cylinder or the mechanical flywheel. These parameters can be preprogrammed for repetitive works or controlled through the touch panel and push buttons by the operator.
Hydraulic Die Spotting Press, Wetori
Applications
Tryout presses are used mostly in the industries where die manufacturing and die/mold spotting are involved. The automotive industry and aerospace industry apply these machines to test the dies/molds to manufacture a great number of parts. They are also found in the plastic, petrochemistry, and electronics industry to produce casing/housing apparatus.
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