Årsagen til, at luftmærker er nemme at opstå ved vandindløbet på pc-dele, er blevet beskrevet tidligere, som er forårsaget af for høj limindsprøjtningshastighed. Derfor, for at løse problemet med luftmærker ved vandindtaget, we must try to reduce the injection speed without producing chatter marks and material shortage.
Af denne grund, we should first ensure that the melt temperature is high enough. In the case of no discoloration and no scorching, we should try our best to increase the melt temperature to 310 ℃ (for pc7025a and pc1250y materials).
For det andet, and most importantly, the mold cavity temperature must be raised to 90-110 ℃. I produktion, the cooling water can be turned off to raise the temperature of the mould with core.
When the mold temperature rises to more than 90 ℃, the injection can be carried out at a very slow speed, and the air marks in the injection parts will gradually fade with the decrease of the injection speed until they disappear. When the melt glue flows through the area where the air marks are formed, it must be turned back to high-speed and high-pressure injection immediately, otherwise the injection parts will produce chatter marks and lack of material.
It should be noted that the mold temperature should not rise too high. If the temperature exceeds 120 ℃, the injection parts will shrink easily, the cooling time will be prolonged, and the production speed will become very slow. På samme tid, the service life of the mold will be shortened because of the high mold temperature, and the surface of the injection parts may even have the problem of dull color.
For the safety of workers, it is best not to use hot oil machine to increase the mold temperature. Because if the temperature of hot oil is adjusted to above 90 ℃, once there is oil leakage, the consequences will be unimaginable. Derfor, if you want to use hot oil engine, you must pay attention to safety.
If the beer piece is thin and big, the heat of the melt will dissipate very quickly, and the heat is also very limited. It is difficult for the mold temperature to rise, and it is a problem whether the material can go well. På dette tidspunkt, we need to add heating tube in the mold to achieve the purpose of heating. På samme tid, it is necessary to increase the width of the water inlet to increase the flux and reduce the filling time, so as to fill the mold cavity and eliminate the gas streak.
If the mold can be changed to hot water port design, it will be very helpful to solve the problem of gas grain.
Om JasonMould Industrial Company Limited
Jasonmould er en Kina mold maker af plastforme- sprøjtestøbeform, formstøbning forme, plastblæsestøbning, rotationsstøbning, medicinsk plast sprøjtestøbning, to skud plast sprøjtestøbning, indsatsstøbning, overformning, metal sprøjtestøbning, mikro sprøjtestøbning, pulverformsprøjtning, keramisk sprøjtestøbning, flydende sprøjtestøbning, husky sprøjtestøbning, husholdningsskimmel, støbeform, formværktøj, brugerdefinerede forme, porcelæn forme, værktøj til hurtig prototyping, værktøj til prototyper i plastik, slagpresseværktøj, dør og værktøj til mobiltelefon/ mobiltelefondele, bildele, støvsugere, genopladelige værktøjer, telefoner, kopimaskiner, computere, multimediehøjttalere, og mange andre elektroniske produkter og husholdningsapparater. Og også en plastproduktproducent, skimmel producent Kina- plastikdele, vandtank i plast, plastik bolde, plastbeholdere, plastspænde, plastanker, plast bøjle, plastske, rørledning i plast, tumlet plast, bordservice i plast, plastik kopper, plastik flasker, plastbakke, kosmetisk beholder af plast, plastkasse, madbeholder i plast, plaststole, plastikkapper, lukning af plasthætte, plastrør, vandrør i plast, plastik knapper, plastrør, brugskasser i plast, plaststativer og så videre.
Kontakt:
Person: James Yuan
Selskab: JasonMould Industrial Company Limited
Tilføje: LongGang Village,LongXi Town,BoLuo County,HuiZhou City,GuangDong-provinsen, Kina
Tlf: 86-752-6682869
E-mail: [email protected]
Websted: https://www.jasonmolding.com/custom-injection-molding/
