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china latest news about What is plastic modification? Plastic modification 8 general directions

What is plastic modification? Plastic modification 8 general directions

April 10, 2024

First: what is the modification of plastics? The modification of plastics is to change the original properties of plastics by some physical, chemical and other methods, increase or improve its original properties, and make it more suitable for terminal products. Second: plastic modification 8 ...
china latest news about H65 brass has 5 hardness states: soft, 1/4 hard, 1/2 hard, hard and extra hard

H65 brass has 5 hardness states: soft, 1/4 hard, 1/2 hard, hard and extra hard

April 9, 2024

The H65 brass national standard has the following five hardness states, which are: soft, 1/4 hard, 1/2 hard, hard and extra hard. The specific hardness standards and corresponding international grades are as follows: 1. Soft state: H65M -- hardness below 100HV (soft state) -- corresponding to ...
china latest news about Which is better, chrome plating or nickel plating? What is the difference? Advantages and disadvantages, as well as price and cost of each?

Which is better, chrome plating or nickel plating? What is the difference? Advantages and disadvantages, as well as price and cost of each?

April 8, 2024

Chromium plating and nickel plating are commonly used processes for metal surface treatment, and there is a significant difference in performance between the two, which can affect their selection in different situations. In actual processes, the performance of nickel plating will appear more ...
china latest news about Analysis of the causes of burrs in stamping trimming and punching dies

Analysis of the causes of burrs in stamping trimming and punching dies

April 6, 2024

Worker Machine Mould Materials 1. Failure to install molds according to standard operating procedures. 2. Failure to wipe the machine tool workbench clean or waste materials on the workbench. 3. The upper and lower surfaces of the mold were not wiped clean. 1. The parallelism and verticality of the ...
china latest news about Non metallic material shell: ball pressure test, hot wire test, needle flame test, UL and IEC differences

Non metallic material shell: ball pressure test, hot wire test, needle flame test, UL and IEC differences

April 5, 2024

In the IEC standard, ball pressure test, Glow wire test, and needle flame test are three main tests used to determine the qualification of plastic materials in products. The main difference between UL and IEC when reviewing non-metallic materials is: 1. Ball pressure test and oven test: IEC ball ...
china latest news about 9 methods for removing burrs, burrs, and burrs

9 methods for removing burrs, burrs, and burrs

April 3, 2024

1. Manual deburring Manual deburring, as the most primitive and ancient deburring method, is currently used by the vast majority of enterprises. This method uses tools such as sandpaper, grinding head, and file to remove burrs, and the file can also be pneumatic or manual. Artificial deburring does ...
china latest news about Specification for commonly used fastener materials

Specification for commonly used fastener materials

April 2, 2024

GB 699 Technical Conditions for Carbon Structural Steel Materials GB 700 Technical Conditions for High Quality Carbon Structural Steel Materials GB 1220 Technical Conditions for Stainless Steel Materials GB 1221 Technical Conditions for Stainless Steel Materials GB 3077 Technical Conditions for ...
china latest news about Eight types of commonly used steel: Q235, 20 steel, 45 steel, 40Cr, Q355 characteristics, uses

Eight types of commonly used steel: Q235, 20 steel, 45 steel, 40Cr, Q355 characteristics, uses

April 1, 2024

Commonly used materials Q235, 20 steel, 45 steel, 40Cr, Q355, what type of steel are they? What is the distinction between ordinary carbon structural steel and high-quality carbon structural steel? What do the numbers in steel grades mean? The correct reading and writing of steel? 1. Carbon steel ...
china latest news about Bolt tightening process specification

Bolt tightening process specification

March 29, 2024

Classification of tightening methods: 1. Torque control method (T) The torque control method was initially used and is also the simplest control method. It is a control method that immediately stops tightening when the tightening torque reaches a set control value Tc. It is based on the proportional ...
china latest news about How to improve stamping?

How to improve stamping?

March 28, 2024

Adjust the equipment: adjust the pressure, speed and other parameters of the equipment to ensure that the contact between the stamping part and the die is uniform. Change the mold structure: optimize the structure of the mold, reduce the sharpness of the corners and corners, and relieve the pressure...
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