If you understand the knowledge of plastic mold materials, please enter

: The lowest flame retardant grade.

And S136H is indeed H for the preheating of steel is generally hardened and tempered to about HB 290 330

There is also the S136 SUP, which is twice as expensive as the S136.

S-136H is pre-hardened and does not need to be quenched.

3.It is suitable for molds that require high gloss and finishing, such as the production of hard rubber (PS) and ultra-non-quenching rubber (ABS), etc., as well as model M202 high-quality pre-hardened plastic mold steel, M238 super pre-hardened plastic mold steel, M300 high-quality pre-hardened anti-corrosion mirror mold steel, M310 high-quality corrosion-resistant mirror mold steel, W302 heat-resistant die-casting mold steel, K460 non-deformable and wear-resistant oil steel, K110 non-deformable toughness and high chromium steel.

4.Khan: This is the physics knowledge of junior 3.

Fahrenheit (°F).

A unit of measurement for temperature.

Fahrenheit: f 32

Set the temperature of the ice-water mixture at zero degrees and the temperature of boiling water at one, and divide them into 100 equal parts, each of which is a unit of Celsius, called 1 degree Celsius. ”

Fahrenheit and Celsius are both units used to measure temperature. Many countries in the world, including China, use Celsius, and the United States and some other English-speaking countries use Fahrenheit and less so Celsius.

Fahrenheit is named after its inventor, Gabriel DNamed by Fahrenheir (1681-1736), its freezing point is 31°F and its boiling point is 212°F.

The inventor of the Celsius was Anders Celsius (1701-1744), which had a freezing point of 0 ° C and a boiling point of 100 ° C.

"Celsius" is a temperature scale widely used in the world, which was proposed by the Swedish astronomer Servis in the 18th century. He set the freezing point at one and the boiling point at zero degrees, between which it was divided into one hundred equal parts, and one equal point was divided into one degree. However, in use, people feel very inconvenient.

The following year, Cervis used the thermometer upside down. Two years later, the famous naturalist Lin Nai also used this kind of thermometer that turned the scale upside down, and declared in a letter: "I was the first to design a thermometer with the freezing point as zero and the boiling point as one."

This type of temperature gauge is still called the Celsius scale (also known as the percentage temperature scale). In order to commemorate Celvis, descendants used the first letter of his name "C" to denote it.

1: HRC --- is Rockwell hardness, HB--- is Brinell hardness.

2: S136 is soft material (need to quench ---HRC48 52) S136H is pre-hard material (no need to quench HRC38 40).

3: PMMA plastic material is called plexiglass material (commonly known as glass fiber material), which is easy to cause die surface (glue plane scratching). It is recommended to use S136 quenching material to make mold jade.

4: Celsius temperature, the temperature at freezing point is 0 degrees Celsius, and the boiling point is 100 degrees Celsius and Fahrenheit temperature sets the freezing point temperature at 32 degrees Fahrenheit and the boiling point at 212 degrees Fahrenheit So 1 degree Celsius is equal to Fahrenheit The conversion formula between Celsius and Fahrenheit is: 5(f- 50) = 9(c-10) where f-Fahrenheit and c-Celsius are smaller than Celsius.

One degree Fahrenheit is equal to 9 5 degrees Celsius value +32

Convert Celsius to Fahrenheit, multiply by 9, divide by 5, and add 32. For example, your body temperature is 37 degrees Celsius. 37 times 9 equals 333. Dividing by 5 equals Plus, which is the Fahrenheit of your body temperature.

You can't learn the ability of the mold industry in books, and you need to practice in the factory. You can communicate if you need to.

While buying books and learning theories, I went into the factory to learn from the master.

Hehe, you can start from two aspects:

First, starting from the macro level, the processing and manufacturing of plastic molds to molding production are regarded as a whole, and the relationship between injection molding machines and molding materials and molds is clarified, as well as the impact on the final molded products.

Second, starting from the microscopic, this is divided into many aspects:

1.The components of the mold structure: runner system, cooling system, ejection system, parting line, mold action.

2.Knowledge of plastic materials: molding characteristics and usage of commonly used rubber compounds 3There are three major elements of injection molding: pressure, speed, and temperature.

4.Machining method of mold making and measuring method of mold and product 5The influence of product structure on the mold, how to optimize the product to facilitate mold manufacturing.

When you really face the problem, you have to learn the method of elimination. Be brave enough to try. There can be no limits to how you can see things. This will grow faster.

Concept: 1) Plastic raw materials (LC plastic raw materials wholesale, high temperature resistant plastic materials, PPS, LCP, PET, PA, PES plastic raw materials): the main ingredient is resin, which is made of polymer synthetic resin as the main ingredient infiltrated into various auxiliary materials or additives, which has plasticity and movement under specific temperature and pressure, and can be molded into a certain shape, and keep the shape unchanged under certain conditions; 2) Plastic has good insulation properties for electricity, heat and sound

Excellent electrical insulation, arc resistance, heat preservation, sound insulation, sound absorption, vibration absorption, and sound attenuation. 3) Most of the plastic raw materials are extracted from some oils, and the most familiar part of the PC material (polycarbonate plastic) is extracted from petroleum, and the PC material has a gasoline smell when burned; ABS (acrylonitrile, butadiene, styrene copolymer plastic) is extracted from coal, and ABS will be soot-like when burned and extinguished; POM (Polyoxymethylene Plastic) is extracted from natural gas, and POM will have a very smelly gas smell when it is burned. Characteristics of general plastic raw materials (LC plastic raw materials wholesale, high temperature resistant plastic materials, PPS, LCP, PET, PA, PES plastic raw materials ** merchants).

1) Plastic raw materials are heated and compressed, and the linear expansion coefficient is much larger than that of metal; 2) The stiffness of general plastic raw materials is an order of magnitude lower than that of metal; 3) The mechanical properties of plastic raw materials will decrease significantly under long-term heating; 4) Generally, plastic raw materials are temporarily stressed at room temperature and under stress lower than their yield strength, and permanent deformation will occur; 5) Wholesale of plastic raw materials is very sensitive to gap damage; 6) The mechanical properties of plastic raw materials are usually much lower than those of metals, but the specific strength and specific modulus of some composite materials are higher than those of metals. 7) Generally, the mechanical properties of enhanced plastic raw materials are heterogeneous; 8) Some plastic raw materials will absorb moisture and cause changes in size and performance; 9) Some plastics are flammable. Classification of plastic raw materials (LC plastic raw materials wholesale, high temperature resistant plastic materials, PPS, LCP, PET, PA, PES plastic raw materials ** merchant) Plastic raw materials follow the molecular structure of synthetic resins, mainly thermoplastic and thermosetting plastics: for thermoplastics, it refers to plastics that are still malleable after repeated heating

PE, PP, PVC, PS, ABS, PMMA, POM, PC, PA and other commonly used raw materials. Thermosetting plastics mainly refer to plastics made of heat-hardened synthetic resins, like some phenolic plastics and amino plastics, which are not commonly used. According to the scope of application, there are mainly general plastics such as PE PP, PVC, PS, etc., and engineering plastics such as ABS, POM, PC, PA, etc.

In addition, there are some special plastics, such as high temperature and humidity resistance, corrosion resistance and other plastics modified for special purposes. Now you should be clear, plastic does not belong to plastics, but its main component is resin, and the main component of plastic is also resin, the two are just the main components are the same, not the same thing.

The former has to take the product by hand, and the latter can be fully automatic demoulding!

In fact, in the mouths of those who make our molds! A plastic mold is a plastic mold!

1.The rubber mold is generally a hot dry pressing mold, the rubber strip is put into the cavity of the rubber mold during processing, after the mold is closed, the mold is put into the hot press, heated, pressurized, and insulated, and finally the mold is taken out, and the mold is opened to take out the product.

2.The plastic mold is generally an injection mold, in which the melted plastic raw material is injected into the mold cavity, and after the raw materials are cooled and solidified in the mold cavity, the mold is opened and the finished product is ejected.

To do rubber hot pressing mold, we should also consider the burr, do V-shaped self-dismantling or ordinary self-disassembly, the rationality of the ranking, etc., but compared with the plastic mold, it is simpler, and the accuracy requirements are not very high.