I vores sprøjtestøbning, på grund af forskellige faktorer, vi ser ofte nogle ubehagelige revner efter støbning, som ofte får os til at føle hovedpine. Så i dag, lad os tale om, hvordan man håndterer revner af plastikdele.
Revner omfatter filamentøse revner, mikrorevner, hvid top, overfladerevner af dele, eller traumekrise forårsaget af klæbende dele og flowkanaler. Ifølge de forskellige revnetider, revnedannelse kan opdeles i afformningsrevner og påføringsrevner. Der er tre hovedårsager
Behandlingsårsag:
(1) If the processing pressure is too high, the speed is too fast, the more materials are filled, and the injection and holding time is too long, the internal stress will be too large and cracks will be produced.
(2) Adjust the opening speed and pressure to prevent parts from cracking due to rapid and strong drawing.
(3) Adjust the mold temperature properly to make the parts easy to demould; adjust the material temperature properly to prevent decomposition.
(4) To prevent low mechanical strength and cracking caused by weld and plastic deterioration.
(5) Proper use of mold release agent, pay attention to eliminate water mist and other substances attached to the mold surface.
(6) After forming, the parts are annealed immediately to eliminate residual stress and reduce cracks.
Mold reason:
(1) The ejection should be balanced. En række forme er meget udbredt i forskellige materialeforarbejdningsindustrier, the number and cross-sectional area of ejector pins should be sufficient, the demoulding slope should be large enough, and the cavity surface should be smooth enough to prevent cracking caused by residual stress concentration caused by external force.
(2) The structure of the parts should not be too thin, and the transition part should adopt arc transition as far as possible to avoid stress concentration caused by sharp corners and chamfers.
(3) Try to use less metal inserts to prevent the increase of internal stress due to the different shrinkage rate of inserts and products.
(4) For deep bottom parts, appropriate demoulding air inlet pipe should be set to prevent the formation of vacuum negative pressure.
(5) The sprue is sufficient to demould before curing, so it is easy to demould.
(6) When the gate sleeve is connected with the nozzle, the cold and hard materials should be prevented from dragging the workpiece onto the fixed die.
Material reason:
(1) The high content of recycled materials leads to low strength of parts.
(2) Too high humidity causes some plastics to react with steam, reducing strength and cracking.
That’s all for today. Please pay attention to us and learn more about injection molding.
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/
