What materials are generally used for molds?
Small abrasive tools generally use: Cr12, 9SiCr,
Large molds generally use: Cr12MoV (cold punching die), 5CrNiMo, 5CrMnMo (hot mold)
What materials are generally used for molds
Cold stamping dies generally use Cr12, CrWMn, Cr12MoV, etc. for the punch and concave dies, and 45 for other parts. #Steel, Q235 steel. Injection molds generally use carbon mold steel: medium carbon structural steel is mainly used, and representative steel grades include S45C, S48C, S50C, S55C, etc. Pre-hardened mold steel: Mainly uses medium carbon alloy steel with high hardenability, representative steel grades are P20, 718, 2311, 2738, 42CrMnMoV, WSM30B. The steel plate is delivered pre-hardened and can be used directly without heat treatment. It is suitable for Suitable for molds with large batches, large mold sizes, complex shapes, and high precision requirements. Age-hardened mold steel: In low-carbon alloy, certain trace elements are added to make the hardness lower, which facilitates mold processing. Then it is heat treated to achieve high hardness requirements. The common steel grade is P80B, which is used for molds with complex shapes and high polishing performance requirements. Mold, corrosion-resistant mold steel, easy-cut mold steel: electroslag type mold steel: it can achieve the effect of polishing to a mirror surface and has strong corrosion resistance. Representative steel grades include 20R and 718R. Die-casting molds generally use materials such as 3Cr2W8V and H13.
Reference material: Baidu
What materials are generally used to make plastic molds?
Since there are many types of plastics, the requirements for plastic products vary greatly. Various performance requirements are also put forward for the materials used to make plastic molds. Therefore, many industrially developed countries have formed a wide range of steel series for plastic molds. Including carbon structural steel, carburized plastic mold steel, pre-hardened plastic mold steel, age-hardened plastic mold steel, corrosion-resistant plastic mold steel, easy-cut plastic mold steel, overall hardened plastic mold steel, martensite Aging steel and plastic mold steel for mirror polishing, etc.
What materials are generally used for mold and fixture processing? 5 points
Answer: SDK11 also has: mechanical blades, slitting mechanical blades, leather mechanical blades, carton mechanical blades, dotted line blades, Food cutting blades, metallurgical machinery blades, rubber machinery blades, pipe cutting machinery blades, food packaging blades, slitting machine knives, strip shaped knives, and paper knives for daily use. Tool materials are divided into: front steel, tungsten steel, carbon steel, tool steel, alloy steel, stainless steel, bearing steel, inlaid front steel, inlaid alloy, carbide, imported materials, LD, SKD11, W18Cr4V2, Cr12MoV, T10, 9CrSi , 65Mn, SK4, M2, D2, SKH, H13, 6CrW2Si.
What materials are generally used for automobile molds
For example, the casting is:
HT300, about 7,500 yuan per ton
CH-1 This one costs about 13,000 yuan per ton
MoCr cast iron costs another 9,500 yuan per ton, etc.
The steel parts are: 45#, 8/KG
Cr12MoV, 21/KG
SKD11, 45/KG
7CrSiMnMoV 18/KG
The price is for reference only, the fluctuation is large, and it depends on the wool material or the smooth material.
What materials are generally used for die-casting molds?
The core is generally 3Cr2W8V or H13
The mold base is generally No. 45
General What materials are the molds made of?
(2) Mold manufacturers can make design preparations in advance to prevent insufficient consideration in a hurry and affect the construction period. In short, to produce high-quality molds, only the close cooperation between supply and demand can ultimately reduce costs and shorten the cycle. 2. Don’t just look at the price, but consider all aspects of quality, cycle, and service. There are many types of molds, which can be roughly divided into ten categories. Different types of molds are selected for molding based on different requirements such as part material, physical and chemical properties, mechanical strength, dimensional accuracy, surface finish, service life, and economy. Molds with high precision requirements need to be processed using high-precision CNC machine tools, and there are strict requirements on mold materials and forming processes. CAD/CAE/CAM mold technology is also required for design and analysis. Some parts have special requirements during molding, and the mold also needs to use hot runners and gas-assisted molding. Manufacturers should have CNC, EDM, wire cutting machine tools and CNC profiling milling equipment, high-precision grinders, high-precision three-coordinate measuring instruments, computer design and related software, etc. Generally, for large-scale stamping molds (such as automobile panel molds), it is necessary to consider whether the machine tool has a pressing mechanism, or even edge lubricants, multi-function position advancement, etc. In addition to stamping tonnage, the number of punches, feeding devices, machine tools and mold protection devices must also be considered. Not every company has and masters the above-mentioned mold manufacturing methods and processes. When choosing a cooperative manufacturer, you must understand its processing capabilities. Not only the hardware equipment, but also the management level, processing experience and technical strength. For the same set of molds, the quotations from different manufacturers sometimes vary greatly.
You shouldn't pay more than the mold is worth, and you shouldn't pay less than the cost of the mold. Mold manufacturers, like you, want to make reasonable profits in their business. Ordering a set of molds with a much lower quote can be the beginning of trouble. Users must start from their own requirements and make a comprehensive assessment. A much lower mold would be where the trouble begins. Users must start from their own requirements and make a comprehensive assessment. 3. Avoid multi-party collaboration and try to integrate mold making and product processing. With a qualified mold (the test piece is qualified), it may not be possible to produce batches of qualified products. This is mainly related to the selection of machine tools for processing parts, the forming process (forming temperature, forming time, etc.) and the technical quality of the operator. With a good mold, you must also have good forming processing. It is best to have one-stop cooperation and try to avoid multi-head cooperation.
What materials are casting molds made of?
Common materials for casting molds are: 1. Wood 2. Plastic 3. Metal (mostly aluminum alloy and steel).
These materials can be processed into relatively complex shapes on CNC machine tools.
Material selection for plastic molds
1. Working conditions of plastic molds Due to the development of the plastics and plastic molding industries, the quality requirements for plastic molds are becoming higher and higher, so plastic molds The failure problem of mold and its influencing factors have become an important research topic. The main working parts of plastic molds are molding parts, such as punches, concave molds, etc., which form the cavity of the plastic mold to shape various surfaces of plastic parts and are in direct contact with plastic, undergoing pressure, temperature, friction and corrosion, etc. effect. 2. Analysis of causes of failure of plastic mold materials. General mold manufacturing includes processes such as mold design, material selection, heat treatment, machining, debugging and installation. According to the survey, among the factors that cause mold failure, the materials and heat treatment used in the mold are the main factors that affect the service life. From the perspective of total quality management, the factors that affect the service life of the mold cannot be measured as the sum of polynomials, but should be the product of multiple factors. In this way, the quality of mold materials and heat treatment is particularly important in the entire mold manufacturing process. important. From the analysis of the common phenomenon of mold failure, plastic molds can cause wear failure, local deformation failure and fracture failure during service. The important failure modes of plastic molds can be divided into wear failure, local plastic deformation failure and fracture failure. 3. Performance requirements of plastic mold steel With the rapid development of the manufacturing industry, plastic molds are indispensable tools in plastic molding processing, and their proportion in the total mold output is increasing year by year. With the development and continuous production of high-performance plastics, The types of plastic products are increasing day by day, their uses are expanding, and the products are becoming more sophisticated, large-scale, and complex. Molding production is developing towards high speed, and the working conditions of molds are becoming more and more complex. 1) Wear and corrosion on the surface of the mold cavity. The plastic melt flows in the mold cavity under a certain pressure, and the solidified plastic parts come out of the mold, which causes friction on the molding surface and causes wear. The fundamental cause of plastic mold wear and failure is the friction between the mold and the material. However, the specific form and wear process of wear are related to many factors, such as the pressure, temperature, material deformation speed and lubrication conditions of the mold during the working process. When the materials and heat treatment used in the plastic mold are unreasonable, the surface hardness of the cavity of the plastic mold is low and the wear resistance is poor, which is manifested as: the size of the cavity surface is out of tolerance due to wear and deformation; the roughness value becomes higher due to roughening , the surface quality deteriorates. Especially when solid materials are used to enter the mold cavity, it will increase the wear of the cavity surface. In addition, during plastic processing, components such as chlorine and fluorine are heated and decompose to produce corrosive gases HC1 and HF, which cause corrosion and wear on the cavity surface of the plastic mold, leading to failure. If there is wear damage at the same time as the wear, and the coating or other protective layer on the surface of the cavity is destroyed, the corrosion process will be promoted. The cross-effect of the two types of damage accelerates corrosion-wear failure. 2) Plastic deformation failure: Pressure and heat on the surface of the plastic model cavity can cause plastic deformation failure. Especially when small molds are working on large-tonnage equipment, overload plastic deformation is more likely to occur. The material used in the plastic mold has insufficient strength and toughness, and low deformation resistance; another reason for plastic deformation failure is that the hardened layer on the surface of the mold cavity is too thin, the deformation resistance is insufficient, or the working temperature is higher than the tempering temperature, resulting in phase change softening. , causing the mold to fail early. 3) The main reason for fracture is structural stress, thermal stress due to structure and temperature difference, or insufficient tempering, which transforms retained austenite into martensite at the operating temperature, causing local volume expansion inside the mold. Caused by tissue stress. The working conditions of plastic molds are different from those of cold stamping dies. They generally have to work at 150℃-200℃. In addition to being subject to a certain pressure, they also have to withstand the influence of temperature. The same mold will have multiple failure modes, and multiple types of damage may occur even on the same mold. It can be seen from the failure modes of plastic molds that the reasonable selection of plastic mold materials and heat treatment is very important, because they are directly related to the service life of the mold. Therefore, steel for plastic molds should meet the following requirements: 1) Heat resistance With the emergence of high-speed molding machinery, plastic products run faster. Since the molding temperature is between 200--350℃, if the plastic fluidity is poor and the molding speed is fast, the molding surface temperature of the mold part will exceed 400℃ in a very short time. In order to ensure the accuracy and minimal deformation of the mold during use, the mold steel should have high heat resistance.
2) Sufficient wear resistance With the expansion of the use of plastic products, inorganic materials such as glass fiber are often added to plastics to enhance plasticity. Due to the addition of additives, the fluidity of the plastic is greatly reduced, resulting in wear of the mold. , so the chess piece is required to have good wear resistance.
3) Excellent...>>
What materials are used in metal stamping dies?
It must be steel! SKD11 is equivalent to the domestic CR12MOV