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Whether you are buying a new injection molding machine or a used one, you must pay attention to the following parameters:
1. Technical parameters of injection molded parts
(1) Screw diameter: the outer diameter of the screw
(2) The effective length of the screw: the length of the screw thread (MM) is often expressed as L
(3) Screw length to diameter ratio L/D: the ratio of the effective length of the screw to the diameter
(4) Screw compression ratio V2/V1: The ratio of the volume V2 of the first groove of the screw feeding section to the volume V1 of the last groove of the metering section
(5) Injection stroke: the maximum distance of screw movement, the maximum distance of screw retreat
(6) Theoretical injection volume: the product of the JIE area of the screw head and the maximum injection stroke
(7) Injection volume: the maximum weight of the screw that injects PS at one time (g)
(8) Injection pressure: the maximum pressure of the pre-melted material on the head during injection MPa
(9) Injection speed: the maximum speed of screw movement during injection (mm/s)
(10) Injection time: During injection, the shortest time for the screw to complete the injection stroke
(11) Injection rate: theoretical volume injected per unit time; screw JIE area × maximum speed
(12) Screw speed: the lowest and highest speed range of the screw when the material is plasticized
(13) Plasticizing capacity: the maximum weight of plasticized materials per unit time
(14) Screw torque: The maximum torque of the screw drive when the material is plasticized (N/m)
(15) Nozzle extension: the length of the nozzle extending from the front template and the mold installation plane
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