Formtemperatur er en vigtig variabel i sprøjtestøbningsprocessen. En varm formoverflade er plastoverfladen, som holder plastoverfladen flydende i lang tid, nok til at danne tryk i formhulrummet. Til hver slags plast- og plastdele, der er en grænse for skimmeloverfladetemperatur, ud over hvilke en eller flere bivirkninger kan forekomme.
Jo højere formtemperatur, jo mindre strømningsmodstand. På mange sprøjtestøbemaskiner, this naturally means faster flow through the sprue, gate and cavity, because the injection flow control valve used cannot correct this change, and faster filling will lead to higher effective pressure in the sprue and cavity. May cause flash. Since the hot mold will not freeze the plastic entering the overflow edge area before the high pressure is formed, the melt will overflow around the ejector rod and overflow into the gap of the dividing line. This shows the need for good injection rate control, which some modern flow control programmers can do.
Generelt sagt, higher mold temperature will reduce the amount of plastic with condensation layer in the mold cavity, making the molten material easier to flow through the mold cavity, so as to increase the weight of parts and improve the surface quality. På samme tid, the die temperature will also improve the tensile strength of the parts.
Mold insulation. Many molds, especially thermoplastics, work at relatively high temperatures, såsom 80 degrees Celsius or 176 grader Fahrenheit. If the mold is not insulated, the heat lost to the air and the injection molding machine can easily be as much as the heat lost by the injection cylinder. Derfor, the mold and plate shall be insulated. Hvis det er muligt, the mold surface shall be insulated. If the hot runner mold is considered, the heat exchange between the hot runner part and the cooling injection part should be minimized. This can reduce energy loss and warm-up time.
1、 Mold temperature control
1. Temperature control has an impact on formability, appearance of formed products, physical properties of materials, formningscyklus, etc., This is affected by the core temperature. Generelt, it is ideal to keep the mold core temperature low, which can increase the injection times, but the molding cycle is related to the shape of the molded product (mold core structure) and the type of finished material, and also depends on whether the filling temperature of the mold core needs to be increased.
2. In order to prevent stress from temperature control, this is a problem of formed material, and the requirement is cooling speed. Shortening the cooling time can avoid the stress caused by uneven shrinkage, even if some parts have hardened and some parts have softened. Sådan finder du en pålidelig plaststøbefabrik, proper temperature control can improve the performance of cooling stress.
3. For the temperature control of crystallization regulation of injection molding materials, the crystallinity regulation of polythiourethane (nylon), polyacetate, polypropylene and other crystalline materials and the improvement of mechanical properties, a higher mold core temperature is generally required.
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du kan logge ind på Dj moldings officielle hjemmeside 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: alle ridser og elektriske bearbejdningsmærker på formens arbejdsflade skal poleres
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/
