（1） Formen opfylder kravene til arbejdsforhold
1. Modstandsdygtighed
Når emnet er plastisk denatureret i støbeformens hulrum, det flyder og glider langs hulrummets overflade, resulterer i alvorlig friktion mellem hulrummets overflade og emnet, resulterer i svigt af formen på grund af slid. Derfor, materialernes slidstyrke er en af de mest grundlæggende og vigtige egenskaber ved forme.
Hårdhed er den vigtigste faktor, der påvirker slidstyrken. Generelt, the higher the hardness of mold parts, the smaller the wear, and the better the wear resistance. Ud over, the wear resistance is also related to the type, antal, form, size and distribution of carbides in the material.
2. Strength and toughness
The working conditions of molds are mostly very bad, and some often bear large impact load, resulting in brittle fracture. In order to prevent sudden brittle fracture of die parts during operation, the die should have high strength and toughness. The toughness of the die mainly depends on the carbon content, grain size and microstructure of the material.
3. Fatigue fracture performance
In the process of die working, fatigue fracture is often caused by the long-term action of cyclic stress. Its forms include small energy multiple impact fatigue fracture, tensile fatigue fracture, contact fatigue fracture and bending fatigue fracture. The fatigue fracture performance of the die mainly depends on its strength, sejhed, hardness and the content of inclusions in the material.
4. High temperature performance
When the working temperature of the mold is high, the hardness and strength will decrease, resulting in early wear or plastic deformation and failure of the mold. Because the mold material should have high tempering stability, so as to ensure that the die has high hardness and strength at working temperature.
5. Cold and hot fatigue resistance
Some molds are in the state of repeated heating and cooling in the working process, so that the surface of the cavity is under the action of tensile and pressure strain stress, resulting in surface cracking and peeling, increasing friction, hindering plastic deformation and reducing dimensional accuracy, resulting in mold failure. Cold and hot fatigue is one of the main forms of hot working die failure. This kind of die should have high cold and hot fatigue resistance.
6. Corrosion resistance
When some molds such as plastic molds are working, due to the presence of chlorine, fluorine and other elements in the plastic, they decompose and precipitate HCI, HF and other strong corrosive gases after heating, which erode the surface of the mold cavity, increase its surface roughness and aggravate wear failure.
（2） The mold meets the process performance requirements
The manufacture of molds generally goes through several processes such as forging, cutting and heat treatment. In order to ensure the manufacturing quality of the mold and reduce the production cost, the material should have good malleability, machinability, hardenability, hardenability and grindability; It should also have small oxidation, decarburization sensitivity and quenching deformation cracking tendency.
1. Malleability
It has low hot forging deformation resistance, good plasticity, wide forging temperature range, low tendency of forging crack, cold crack and precipitation of network carbide.
2. Annealing processability
The spheroidizing annealing temperature range is wide, the annealing hardness is low and the fluctuation range is small, and the spheroidizing rate is high.
3. Vi vil angive områder, hvor dårligt design kan forårsage termisk stress
Large cutting parameters, low tool loss and low machining surface roughness.
4. Oxidation and decarburization sensitivity
When heated at high temperature, it has good oxidation resistance, slow decarburization speed, insensitive to heating medium and small tendency to produce pitting.
5. Hardenability
Efter bratkøling, it has uniform and high surface hardness.
6. Hardenability
Efter bratkøling, a deep hardening layer can be obtained, and it can be hardened with mild quenching medium.
7. Quenching deformation and cracking tendency
Conventional quenching has small volume change, slight shape warpage and distortion, and low tendency of abnormal deformation. Conventional quenching has low cracking sensitivity and is not sensitive to quenching temperature and workpiece shape.
8. Grindability
The grinding wheel has small relative loss, no burn limit, large grinding amount, insensitive to grinding wheel quality and cooling conditions, and is not prone to abrasion and grinding cracks.
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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/
