iyiphi impahla engcono isikhunta?

I isikhunta meets the requirements of working conditions

1. Ukugqoka ukumelana

When the blank is plastically deformed in the mold cavity, liyageleza bese liyashelela phezu komgodi, okubangela ukungqubuzana okunamandla phakathi kwendawo yomgodi nokungenalutho, okubangela ukuthi isikhunta sihluleke ngenxa yokugqoka. Ngakho-ke, the wear resistance of the material is one of the most basic and important properties of the mold.

Ukuqina kuyisici esiyinhloko esithinta ukumelana nokugqoka. Ngenjwayelo, the higher the hardness of the mold parts, the smaller the amount of wear and the better the wear resistance. Ngaphezu kwalokho, ukugqoka ukumelana nakho kuhlobene nohlobo, quantity, uhlobo, usayizi nokusatshalaliswa kwe-carbides kundaba.

2. Strength

The working conditions of the molds are mostly very bad, and some of them are often subjected to large impact loads, which leads to brittle fracture. In order to prevent sudden brittle fracture of mold parts during work, the mold must have high strength and toughness.

The toughness of the mold mainly depends on the carbon content, grain size and organization state of the material.

3. Ukukhathala kokuphuka ukusebenza

In the process of mold work, under the long-term action of cyclic stress, fatigue fracture is often caused. Its forms include low-energy multiple impact fatigue fracture, i-tensile fatigue fracture, contact fatigue fracture, and bending fatigue fracture.

The fatigue fracture performance of the mold mainly depends on its strength, ubulukhuni, ubulukhuni, kanye nokuqukethwe kokufakwa kundaba.

4. Ukusebenza okuphezulu kwezinga lokushisa

When the working temperature of the mold is higher, the hardness and strength will decrease, leading to early wear of the mold or plastic deformation and failure. Because the mold material should have high anti-tempering stability, to ensure that the mold has a high hardness and strength at the working temperature.

5. Resistance to cold and heat fatigue

Some molds are in a state of repeated heating and cooling during the working process, which causes the surface of the cavity to be pulled and pressure to change the stress, causing surface cracks and peeling, increasing friction, hindering plastic deformation, and reducing dimensional accuracy. Mold failure. Heat and cold fatigue is one of the main forms of failure of hot work molds, and this type of mold should have high resistance to cold and heat fatigue.

6. Ukumelana nokugqwala

When some molds such as plastic molds are working, due to the presence of chlorine, fluorine and other elements in the plastics, strong corrosive gases such as hci and hf will be resolved after being heated, which will erode the surface of the mold cavity, increase its surface roughness, and aggravate wear failure.

Okwesibili、the mold meets the process performance requirements

Ukwenziwa kwesikhunta ngokuvamile kuhilela izinqubo eziningana ezifana nokubumba, ukusika, kanye nokwelashwa kokushisa. Ukuze kuqinisekiswe ikhwalithi yokukhiqiza isikhunta kanye nokunciphisa izindleko zokukhiqiza, impahla kufanele ibe nokuphepheka okuhle, ukusebenziseka kalula, ukuqina, ukuqina nokugaya; it should also have small oxidation, decarburization sensitivity and quenching Deformation and cracking tendency.

1. Ukukhohlwa

Inokumelana ne-deformation deformation ephansi eshisayo, ipulasitiki enhle, ububanzi bokwenza izinga lokushisa, low tendency of forging cracking and cold cracking and precipitation of network carbides.

2. Anealing processability

Ibanga lokushisa le-spheroidizing annealing libanzi, ubulukhuni be-annealing buphansi, ububanzi bokuguquguquka buncane, futhi izinga le-spheroidizing liphezulu.

3. Ukusebenziseka kalula

The cutting amount is large, the tool loss is low, and the machined surface roughness is low.

4. Ukuzwela ku-oxidation kanye ne-decarburization

Lapho kushisa ezingeni lokushisa eliphezulu, ukumelana ne-oxidation kuhle, isivinini se-decarburization sihamba kancane, it is not sensitive to the heating medium, and the tendency of pitting is small.

5. Ukuqina

Ngemva kokuphothula, inokuqina okufanayo kanye nokuqina kwendawo ephezulu.

6. Ukuqina

Ngemva kokuphothula, ungqimba oluqinile olujulile lungatholakala, okungaba lukhuni ngokusebenzisa i-mild quenching medium.

7. Ukuthambekela kokucisha i-deformation nokuqhekeka

Ukucisha okuvamile kunokushintshwa kwevolumu encane, shape warping, slight distortion, kanye nokuthambekela okuphansi kokuguquguquka okungavamile. Conventional quenching has low sensitivity to cracking, and is insensitive to quenching temperature and workpiece shape.

8. Ukugaya

The relative wear of the grinding wheel is small, and the limit of grinding without burn is large. Ayizwani nekhwalithi yesondo lokugaya nezimo zokupholisa, and it is not easy to cause abrasion and grinding cracks.

Okwesithathu, the mold meets the economic requirements

When selecting izinto zokwakha for the isikhunta, the principle of economy must be considered to reduce the manufacturing cost as much as possible. Ngakho-ke, under the premise of satisfying the performance, first choose the lower price, carbon steel can be used without alloy steel, and domestic materials can be used without imported materials. Ngaphezu kwalokho, the production and supply of the market should also be considered when selecting materials. The selected steel grades should be as few and concentrated as possible .

The injection molding process conditions have an impact on the appearance and mechanical properties of plastic products. Each process condition parameter affects each other and is not independent. The defects of some products are the result of mutual influence.

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