THIẾT TRÌNH THIẾT KẾ CHẾ TẠO KHUÔN MẪU ĐỦ 25 BÀI_12_EN

(Cold runner) • Tasks and technical requirements? • The composition and characteristics of the part, how to calculate the size and layout silver spray stalk, entrance channel and plastic • Computing applications, systems design to channel cool computer mouse shell (using Creo to design) Tasks and technical requirements? • Guide channel system cools the molten resin from the nozzle of the injection molding machine via Roll puff, canals and then into the cavity vent • c) Design Principles • - Make sure the filling and the cavity • - Choosing the right location for vents why not affect • Cosmetic products and mechanical properties of the product • - Be sure to get the product quickly Composed of cold channel system Roll Silver Spray nozzle • The size of a nozzle stalk injection Part materials in that branch from freezing early obstruction in the design flow should further slow cooling tail.? • Usually located in the intersection of the channel branch R0.5 should bo corners Channel system I FLOW IN channel The thickness of the plastic layer freezes affected: • Speed Inkjet • The Melting • The temperature of the mold II.KENH his people • Kenhnhua: is the connection between injection and vents Roll Request of canals Specifications channel Có thểtính đường kính thủy lực dựa vào công thức: • The surface area of the smallest cut.? • Speed slow cooling.? • Less friction.? • It helps maintain core slowly cools heat and pressure.? • Difficult for machining between two concentric half mold 2.2 The type of channel cross section •Larger surface area for effective trapezoidal channel correction should lose heat faster • Ease of processing • Do not cool section should make funeral friction, pressure, irregular • Ease of processing The size of the channel (there are methods • Size calculation based on cross section cut D: channel diameter (mm) W: weight of products (g) L: channel length (mm) or: D ': diameter reference channel fL: coefficient length • The relationship between the diameter of the main channel and branch channels: • Dc: The main canal diameter (mm) • Dn: branched channel diameter (mm) • N: number of diverters