WebDec 12, 2024 · The tonnage type of the injection machine is determined by the clamping force, and the formula for calculating the tonnage required for the clamping force of the injection molding machine is as follows: F1= (n A1+A2) P A1 – maximum projected area of finished product, total length * total width, unit: cm2 WebNow you can calculate necessary tonnage based on the projected area times the clamp factor for the material used. T = A x cf. For example, the projected area of the molded part …

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WebThis projected area is multiplied by a clamp force of 2 to 8 tons for each square inch of the projected areas. As a rule of thumb, 4 or 5 tons/inch can be used for most products. If the … WebDec 12, 2024 · A1 – maximum projected area of finished product, total length * total width, unit: cm2. A2 – projected area of the injection system, unit: cm2. P – pressure coefficient … huntington ingalls 401k terms of withdrawal

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WebThe molding press is fully closed. The pressure applied is normally on the order of 1.50 to 2.0 MPa (250-300 psi) based on the projected area of the molding e.g., a parts plan area is 300 x 400 mm in size. Its area is 0.300 x 0.400 m2 = 0.12 m2 therefore, a pressure of 1.500 x 0.12 = 0.18 MPa on the mold is required. WebSep 4, 2024 · Projected area + What is injection pressure? There are two main injection pressure in injection molding process: the fill pressure (primary pressure) and the hold pressure (secondary pressure). The fill … WebJul 13, 2024 · There are several ways to calculate the injection molding machine tonnage. we will give you a brief guide below. 1.Clamping force formula one F = A * Ka F – clamping force -tf A – projected area – in2 Ka – area constant- tf/in2 This method is not accurate. It must be based on rich experience to know how to choose a more accurate constant. mary and giles house