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Influence of mold temperature, melt temperature and injection speed on product shrinkage
1、 Two temperature conditions that are not conducive to solving the shrinkage problem 1) The mold temperature is too low, which is not conducive to solving the shrinkage problem The shrinkage problem of hard rubber parts (surface shrinkage and internal shrinkage) is a defect caused by the space ...Read more -
Correct mold cleaning may be an effective way to solve burrs
Flash of parts may occur due to various reasons, from changes in process or materials to tooling failures. Burrs will appear on the edge of the part along the parting line of the mold or anywhere where the metal forms the boundary of the part. For example, plastic electrical shell, pipe joint, pl...Read more -
Why does stainless steel rust?
1、 What is stainless steel? Stainless steel is a kind of steel. Steel refers to the steel containing less than 2% carbon (c), and more than 2% iron. Alloy elements such as chromium (CR), nickel (Ni), manganese (MN), silicon (SI), titanium (TI) and molybdenum (MO) are added to the steel in the sm...Read more -
Application of thermoplastic elastic material TPE
TPE is the most ideal material for preparing products with good tensile resilience, such as tension belt, tension tube and resistance belt. In addition, TPE can also be used for extrusion products such as conveyor belts, tourniquets, sealant strips, and water pipes. TPE here means that SEBS base ...Read more -
How to improve the plating performance of PC / ABS?
Electroplated PC / ABS products are widely used in the automobile, home appliances and it industries because of their beautiful metal appearance. Material formulation design and electroplating process are generally considered to be the main factors affecting the electroplating performance of PC /...Read more -
Chemical recovery technology of plastics
For many years, the main method of recycling plastics is mechanical recycling, which usually melts the plastic fragments and makes them into particles of new products. Although these materials are still the same plastic polymers, their recycling times are limited, and this method is highly depend...Read more -
Points for attention in PVC injection molding process
PVC is a heat sensitive material, and its injection molding process is poor. The reason is that too high melt temperature or too long heating time can easily decompose PVC. Therefore, controlling the melt temperature is the key to injection molding PVC products. The heat source for melting PVC ra...Read more -
Causes and solutions of surface cracks of plastic parts
1. Residual stress is too high In terms of process operation, it is the easiest way to reduce the residual stress by reducing the injection pressure, because the injection pressure is proportional to the residual stress. In terms of mold design and manufacturing, the direct gate with minimum pres...Read more -
Common surface treatment processes for metal and plastic products
In order to meet the requirements of corrosion resistance, wear resistance, decoration or other special functions of products, surface treatment technology came into being. Surface treatment process of common products – plastic The surface treatment of plastic products can be divided into m...Read more -
Plastics and household appliances are inseparable
Plastic is the representative of modern materials, and its advantages and disadvantages are as distinct. However, with the progress of science and technology, the performance of plastic is more and more easy to control. In almost all industries, the application of plastic is more and more extensi...Read more -
What are the advantages of PP tableware over ordinary plastic tableware?
There is usually a triangle with an arrow at the bottom of the plastic cup, and there is a number in the triangle. The specific representatives are as follows No.1 PET polyethylene terephthalate Common mineral water bottles, carbonated beverage bottles, etc. Heat resistant to 70 ℃, easy to deform...Read more -
Difference between HDPE and PE
HDPE is also known as high density polyethylene material. It is a kind of thermoplastic resin with high crystallinity and non polarity. The appearance of the original HDPE is milky white and translucent to a certain extent in the thin section. The polymer is non hygroscopic and has good water vap...Read more -
Application and characteristics of metal stamping parts
Metal stamping parts are mainly formed by stamping metal or non-metal sheets through stamping dies with the help of the pressure of the press. It mainly has the following characteristics: ⑴ metal stamping parts are produced by stamping and forging on the premise of low material consumption. Their...Read more -
How to deal with the weld lines of injection molded products?
The main causes of weld lines are: when the molten plastic encounters inserts, holes, areas with discontinuous flow velocity or areas with interrupted filling flow in the mold cavity, the confluence of multiple melts; When the gate injection mold filling occurs, the materials cannot be completely...Read more -
How is phenol formaldehyde resin formed？
Bakelite is phenolic resin. Phenolic resin (PF) is a kind of industrial plastic products. The raw materials of phenolic resin production are mainly phenol and aldehyde, and phenol and formaldehyde are commonly used. They are polymerized by condensation reaction under the catalysis of acid, base a...Read more -
Injection molding production of BMC materials
BMC (DMC) material is the abbreviation of bulk (dough) molding compounds, that is, bulk molding compounds. It is often called unsaturated polyester group molding compound in China. Its main raw materials are mass prepregs made of GF (chopped glass fiber), up (unsaturated resin), MD (filler calciu...Read more -
AN oil pipe joint
What is AN oil pipe joint? In fact, AN oil pipe joint is a kind of oil pipe joint. Through people’s transformation, it can enter the connecting pipe more quickly, and it can withstand high temperature and high pressure. Many of these oil pipe joints are woven from nylon rope and other mater...Read more -
Functions and types of automobile oil cooler
The function of the oil cooler is to cool the lubricating oil and keep the oil temperature within the normal working range. On the high-power reinforced engine, due to the large heat load, the oil cooler must be installed. When the engine is running, the lubricating ability is reduced because the...Read more -
Maintenance and usage of sandwich machine
1、 How to use sandwich machine Turn on the power of the sandwich machine and preheat it. Put butter on the bread slice, put the butter side down into the baking pan, then put the prepared material on the bread slice, cover the other bread slice with butter on the side dish, and finally cover the...Read more -
Use of bakelite
Phenolic plastic, commonly known as bakelite powder, was invented in 1872 and put into industrial production in 1909. It is the oldest plastic in the world, the general name of plastics based on phenolic resin, and one of the most important thermosetting plastics. Generally, it can be divided int...Read more