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What are the types of mold processing?

Update:07-01-2022
Summary:

It depends on how you divide it! For example, there are […]

It depends on how you divide it! For example, there are plastic molds, metal molds! Others include hot stamping dies, cold stamping dies, die-casting dies, hot forging dies, etc.

Types of molds and required working conditions and common sense of material requirements

Mold type Working conditions Performance requirements for mold materials / common materials

【Cold Die】Includes:

Blanking die

It is mainly used for punching and forming of various sheet materials, and its cutting edge is subjected to strong friction and impact during the working process. It has high wear resistance, impact toughness and fatigue fracture resistance.

Cr12mov, Cr12, SKD11, T10A, W18Cr4V, 6-5-4-2

Extrusion die

It is mainly used for deformation and forming. The punch bears huge pressure during work, and the die bears huge tension; due to the violent flow of metal in the cavity, the punch and the working surface of the die are strongly rubbed and the surface temperature of the die is increased. Rise 200-300 ℃. It has high deformation resistance, abrasion resistance and fracture resistance. In addition, it should have high tempering stability.

H13, 3Cr2W8V, 40Cr, 38CrMoAl, 5CrNiMo

Drawing die

It is mainly used for deep drawing forming with a certain degree of plasticity. The working stress is not large, but the entrance of the cavity bears strong friction. With high hardness and wear resistance, the working surface roughness is low

Cr12MoV, Cr12, D2, 6-5-4-2, PeCu

Bending die

It is mainly used for bending and forming of metal materials with a certain degree of plasticity. The load acting on the mold is not very large, but there is a certain amount of friction. Has high wear resistance and breaking ability.

Cr12MoV, D2, T10A, S45C

【Plastic mold】Include:

Thermosetting plastic mold

The force is large, the working temperature is high (200-250℃), it is easy to corrode, easy to wear, and it is also subject to the impact and collision of demoulding during manual operation. It has high toughness, abrasion resistance, cold and heat fatigue resistance, and a certain degree of corrosion resistance.

718, P20, Mak80, 40CrNiMo, 38CrMoAl, 45#

Thermoplastic injection mould

Heat, pressure and friction are not too serious. Some plastic products contain chlorine and fluorine, which emit corrosive gases during pressing, which will erode the surface of the cavity. It has high corrosion resistance and a certain degree of wear resistance and toughness.

718, 738, NAK80, 38CrMoAl, 40CrNiMo

【Die Casting Mould】

The working temperature of the cavity is high and is subject to repeated severe temperature changes. Has high thermal strength and resistance to cold and heat fatigue.

H13, 3Cr2W8V, 5CrNiMo

【Forging Die】

The working temperature of the mold is relatively high (about 300°C), and the blank will rub against the surface of the cavity during the deformation process, and will be subjected to a strong impact load. It has high strength and toughness, heat and cold fatigue resistance, high hardenability, and good tempering stability.

3Cr2W8V, H13, 5CrMnMo, 5CrNiMo

【Powder metallurgy mold】

The hardness of the metal powder is generally very high, and the mold is subjected to strong friction during the working process. In addition, the metal powder has a small particle size, which can easily block the gap, increase friction, and cause difficulty in demolding. It has high hardness and wear resistance, and low surface roughness.

D2, Cr12MoV, W18Cr4V, 6-5-4-2

Hope it helps you

2, What are the classifications of hardware molds?

 

 

Commonly used simple machinery types include levers, pulleys, axles, gears, inclined planes, spirals, splits, and so on.

The first four simple machines are the deformation of levers, so they are called "simple levers". The latter three are the deformation of the inclined plane, so they are called "simple machines of inclined plane". No matter which type of simple machinery is used, it must follow the general law of machinery-the principle of work.

All devices that can change the magnitude and direction of force are collectively referred to as "mechanical." The use of machinery can not only reduce physical labor, but also improve work efficiency. There are many types of machinery, and they are more complicated.

  1. The principle of leverage

Also known as the "leverage balance condition". To balance the lever, the magnitude of the two forces (power and resistance) acting on the lever is inversely proportional to their arms. Power * power arm = resistance * resistance arm, expressed in algebraic formula as

F1·L1=F2·L2

In the formula, F1 represents power, L1 represents power arm, F2 represents resistance, and L2 represents resistance arm. It can be seen from the above formula that in order to balance the lever, the power arm is several times the resistance arm, and the power is a fraction of the resistance.

When using a lever, in order to save effort, you should use a lever whose power arm is longer than the resistance arm; if you want to save distance, you should use a lever whose power arm is shorter than the resistance arm. Therefore, the use of levers can save effort and distance.

However, if you want to save effort, you must move more distance; if you want to move less, you must spend more effort. It is impossible to save effort and move less distance.

  1. Leverage application

Different types of levers have different characteristics and uses. Once you have mastered the principle of leverage, you can consciously choose different types of leverage to use according to your needs.

It should be clear: labor-saving levers are labor-saving but need to move more distance, labor-saving levers are labor-saving but distance-saving, equal-arm levers are not labor-saving and distance-saving, and there is no lever that saves labor and distance. Whether some levers are labor-saving or distance-saving is not eternal.

According to different usage conditions, it will change from labor saving to distance saving. For example, the process of shoveling soil with a shovel and loading soil on a truck will change. The fulcrum point is between the power point and the resistance point when shoveling soil, and the power point is between the fulcrum point and the resistance point when soil is loaded.

Reference materials:

Baidu Encyclopedia-Simple Machinery

  1. What are the classifications of molds

 

 

Types of die steel

  1. Cold work die steel
  2. High-carbon low-alloy cold work die steel

9SiCr, 9CrWMn, CrWMn, Cr2, 9Cr2Mo, 7CrSiMnMoV, 8Cr2MnWMoVS, Cr2Mn2SiWMoV

  1. Anti-wear cold work die steel

6Cr4W3Mo2VNb, 6W6Mo5Cr4V, 7Cr7Mo3V2Si, Cr4W2MoV, Cr5Mo1V, Cr6WV, Cr12, Cr12MoV, Cr12W, Cr12Mo1V1

  1. Impact resistant cold work die steel

4CrW2Si, 5CrW2Si, 6CrW2Si

  1. Carbon tool steel for cold work die

T7, T8, T9, T10, T11, T12

  1. High-speed steel for cold work die

W6Mo5Cr4V2, W12Mo3Cr4V3N, W18Cr4V, W9Mo3Cr4V

  1. Steel for non-magnetic molds

7Mn15Cr2Ae3V2Wmo, 1Cr18Ni9Ti

  1. Hot work die steel
  2. Low heat resistance hot work die steel

5CrMnMo, 5CrNiMo, 4CrMnSiMoV, 5Cr2NiMoVSi

  1. Medium heat resistance hot work die steel

4Cr5MoSiV, 4Cr5MoSiV1, 4Cr5W2VSi, 8Cr3

  1. Hot work die steel with high heat resistance

3Cr2W8V, 3Cr3Mo3W2V, 5Cr4Mo2W2VSi, 5Cr4Mo3SiMnVAe, 5Cr4W5Mo2V, 6Cr4Mo3Ni2WV

Three, plastic mold steel

  1. Carbon plastic mold steel

SM45, SM50, SM55

  1. Pre-hardened plastic mold steel

3Cr2Mo, 3Cr2NiMnMo, 5CrNiMnMoVSCa, 40Cr, 42CrMo, 30CrMnSiNi2A

  1. Carburized plastic mold steel

20Cr, 12CrNi3A

  1. Age-hardening plastic mold steel

O6Ni6CrMoVTiAe, INi3Mn2CuAeMo

  1. Corrosion-resistant plastic mold steel

2Cr13, 4Cr13, 9Cr18, 9Cr18Mo, Cr14Mo4V, 1Cr17Ni2

Related concepts

 

Mould

Mold (mú jù), various molds and tools used in industrial production to obtain the required products by methods such as injection molding, blow molding, extrusion, die-casting or forging molding, smelting, and stamping. In short, a mold is a tool used to make molded objects. This tool is composed of various parts, and different molds are composed of different parts. It mainly realizes the processing of the shape of the article through the change of the physical state of the formed material. Known as the "Mother of Industry".

 

Abrasion resistance

The wear resistance of the material is expressed by the amount of wear or wear index. Abrasion resistance is also called abrasion resistance. The wear resistance is almost related to all the properties of the material, and under the conditions of different wear mechanisms, there are different requirements for the properties of the material in order to improve the wear resistance.

 

Resistance

The ability of a structure or structural member to resist action effects and environmental influences is called the resistance of a structure or structural member, which is generally represented by R. The resistance is divided into four levels: overall structural resistance (such as the ability of the overall structure to withstand wind loads), structural component resistance (such as the bearing capacity of components under the action of axial force and bending moment), and component section resistance (component section Shear ability) and the resistance of each point of the section (the ability of each point of the section to resist normal stress and shear stress).