We Buy & Sell Used Die Tryout and Die Spotting Presses Worldwide
We Buy, Sell, Appraise and are a Supplier of used die tryout and die spotting presses used in die casting and plastic injection molding tool rooms. Die Spotting and Tryout Presses typically include the following features: Roll-out bottom bolster, Swing-down top platen, wax or plastic injection units and tonnage control. Major brands of die spotting presses include Dake, Reis, Eagle and Millutensil.
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We buy Hydraulic Die Tryout and Die Spotting Presses - We sell Worldwide
The Hydraulic Die Spotting and Try-out Press Explained
There are several unique features that make up a hydraulic die spotting press. In general the press works as follows: First the lower bolster plate rolls outside of the press bed area. It typically rolls on steel wheels on a track. This makes it easy to place the die set on the bottom bolster and clamp it in place. In the die casting world it would be the ejector half of the die that is placed and clamped to the roll-out bolster (bottom bolster plate). The roll-out bolster is usually moved in and out of the press bed area via a hydraulic cylinder. After the die has been clamped to the bottom bolster it shuttles back into the press. Next the die is either raised up to the top bolster or the top bolster lowers to the die and the cover half of the die is clamped into place. At this point auxiliary hydraulic hoses are connected to any core circuits so that they can be moved in and out. At this point the die can be clamped and a wax injection unit (sometimes plastic injection unit) injects either wax or plastic into the die to make a sample part. The die are separated and the part is removed. By inspecting the sample part it can be determined what work the tool (die) needs. Now the lower bolster rolls out, and the top bolster swings down - either 90 or 180 degrees so that repair work (welding, grinding, polishing, etc.) can be done fo the die. Because of the roll-out lower bolster and the swing-down upper bolster the die halves are in an easy to access (and work on) position. The process it repeated until the die is ready for production. Another aspect of a die spotting press is the "bluing" the die. In this process a bluing product is applied by a tool maker to the mating surfaces of the mould. This thin coating of blue is usually applied with a paint brush. The die is then clamped in the spotting press. If the "blue" appears evenly on the mating areas, it is considered by the tool makers as "good matching" and thus expecting a good final product from the tool. Usually no tool would be transferred to testing or production without "blue matching", a term generally used by the tool makers in Asia. In other words, bluing is considered as an integral part of precision tool making and necessitates a spotting press. In the US, the terms machinist's blue, scraping blue, or simply bluing are used instead of engineer's blue.