Praecipua vexillum iniectio machinae pondus

Iniectio pondus

Iniectio pondus is an important parameter of the injection molding machine. It is the most frequently used parameter when selecting an injection molding machine, expressed in ounces or grams. Although this parameter is simple and easy to understand, it is easy to be misunderstood. The reason is very simple. When the plastic is selected, the injection molder can determine the weight of the plastic part, so they can easily choose the machine by this injection weight. In fact, the injection weight is defined as the weight of the plastic injection when an empty injection (not injected into the mold) is measured, rather than theoretically calculated. The compound used is usually a general hard rubber with a specific gravity of 1.05. When the plastic of the plastic part is different from PS, the injection weight of the specification can be used after the following conversion. Injection weight of non-PS plastic = c*b/1.05, (b = specific gravity of plastic and c = injection weight expressed in PS.) For example: the specific gravity of Saigang is 1.42, it is in one injection weight (calculated as PS) 8 oz.

(1) Elige iniectio machinae coronae cum pondere iniectio sufficienti - non debes eligere iniectio machinae coronae cum iniectione ponderis aequalis ponderi partis plasticae plus quam pondus fluxus canalis plastici. In injectione minus exigente corona, ut toy imagines, totum pondus 85% ponderis injecti esse debet. In infusione postulans corona, ut crystallum supplet, 75%. Iniectio ponderis mensuratus in iniectione vana parva est ad iniectionem pressionis, et alta iniectio corona requirit altam iniectionem pressionis.

Exempli gratia, cum polyvinylum chloride rigidum utens (UPVC) cum gravitate specifica 1.38 ad imaginem toy formandam, pars plastica et cursor plasticus pondo 4 uncias appendit, et iniectio machinae coronae injicienda est. Iniectio ponderis per PS = 4*1.05/0.38 = 3.04 oz. Duce 85% utens, iniectio requiritur pondus = 3.04 / 0.85 = 3.58 oz.

(2) Iniectio machinarum machinarum cum iniectione nimia ponderum non est adhibenda. Totum pondus partium plasticarum ac materiarum cursorium debet esse inter 35% et 85% ponderis injectionis. Terminus inferior tribus considerationibus debetur: inclinatio stencil, commoratio temporis plastici in dolio et potentia consummationis per kg iniectionis partem effictam.

Usus parvae formae ad partem iniectionis parvae formatae causare potest Formulam nimiam flectere, causando scalpere (productum qualitatem afficiens) et etiam exemplum ruptionis.

Iniectio corona partium plasticarum parvarum cum iniectione machinae machinae oversisatae, nimis longum tempus residentiae liquefactum faciet ut plasticam putrescere faciam.

Usus multi-cavitatis vel maioris moris magnitudinis aliquas difficultates fabricandi partes plasticae parvas cum magnis machinis solvere potest. Temperatura dolii reducendo etiam compositionem orationis ob longi temporis habitationem levat.