cov khoom twg yog qhov zoo tshaj plaws rau pwm?

Cov pwm meets the requirements of working conditions

1. Hnav tsis kam

When the blank is plastically deformed in the mold cavity, nws ntws thiab swb raws saum npoo ntawm cov kab noj hniav, ua rau kev sib txhuam ua txhaum nruab nrab ntawm cov kab noj hniav thiab seem, uas ua rau cov pwm kom swb vim hnav. Yog li ntawd, the wear resistance of the material is one of the most basic and important properties of the mold.

Hardness yog lub ntsiab tseem ceeb cuam tshuam rau hnav tsis kam. Feem ntau, the higher the hardness of the mold parts, the smaller the amount of wear and the better the wear resistance. Ntxiv thiab, hnav tsis kam kuj muaj feem xyuam rau hom, quantity, lub cev, qhov loj thiab kev faib tawm ntawm carbide hauv cov khoom.

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. Kev qaug zog tawg ua haujlwm

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, tensile qaug zog tawg, contact fatigue fracture, and bending fatigue fracture.

The fatigue fracture performance of the mold mainly depends on its strength, tawv, tawv, thiab cov ntsiab lus ntawm kev suav nrog hauv cov khoom siv.

4. Kev kub siab ua haujlwm

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. Corrosion kuj

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.

Thib ob、the mold meets the process performance requirements

Kev tsim cov pwm feem ntau muaj ntau yam txheej txheem xws li forging, txiav, thiab kev kho cua sov. Txhawm rau kom ntseeg tau qhov zoo ntawm pwm tsim thiab txo cov nqi tsim khoom, cov khoom yuav tsum muaj zoo forgeability, machinability, hardenability, hardenability thiab grindability; it should also have small oxidation, decarburization sensitivity and quenching Deformation and cracking tendency.

1. Forgeability

Nws muaj tsawg kub forging deformation kuj, zoo plasticity, dav forging kub ntau yam, low tendency of forging cracking and cold cracking and precipitation of network carbides.

2. Annealing txheej txheem

Lub spheroidizing annealing kub ntau yog dav, lub annealing hardness yog tsawg, qhov kev hloov pauv yog me me, thiab spheroidizing tus nqi yog siab.

3. Machineability

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

4. rhiab heev rau oxidation thiab decarburization

Thaum tshav kub kub, oxidation kuj zoo, lub decarburization ceev yog qeeb, it is not sensitive to the heating medium, and the tendency of pitting is small.

5. Hardenability

Tom qab quenching, nws muaj uniform thiab siab hardness.

6. Hardenability

Tom qab quenching, tuaj yeem tau txais ib txheej txheej hardened, uas tuaj yeem hardened los ntawm kev siv ib qho me me quenching nruab nrab.

7. Kev xav ntawm quenching deformation thiab tawg

Pa quenching muaj me me hloov pauv, shape warping, slight distortion, thiab tsis tshua muaj siab ntawm qhov txawv txav. Conventional quenching has low sensitivity to cracking, and is insensitive to quenching temperature and workpiece shape.

8. Grindability

The relative wear of the grinding wheel is small, and the limit of grinding without burn is large. Nws tsis rhiab rau qhov zoo ntawm lub log sib tsoo thiab cua txias, and it is not easy to cause abrasion and grinding cracks.

Peb, the mold meets the economic requirements

When selecting cov ntaub ntawv for the pwm, the principle of economy must be considered to reduce the manufacturing cost as much as possible. Yog li ntawd, 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. Ntxiv thiab, 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.

Yog tias koj muaj lus nug txog kev lag luam yas,plz xav tias dawb nug FLYSE team,peb yuav muab kev pabcuam zoo tshaj rau koj!

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