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  • 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...
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  • 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...
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  • 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...
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  • 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...
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  • 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...
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  • 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...
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  • 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...
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  • 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...
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  • 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...
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  • 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...
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  • 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...
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  • 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...
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  • 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...
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  • 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...
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  • 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...
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  • What is the working principle of hydraulic hand brake?

    Working principle of hydraulic handbrake: cut off the oil pipe leading to the rear brake, connect the oil inlet of the hydraulic handbrake pump at the front end and the oil outlet at the rear end. When you step on the foot brake, the brake oil flows through the hand brake pump we later installed ...
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  • What are the types of automobile oil pipe joints?

    There are many kinds of automobile oil pipe joints. The commonly used pipe joints can be divided into two types: hard pipe joints and hose joints. According to the connection mode of pipe joint and pipe, there are three types of hard pipe joint: flared type, ferrule type and welded type, and the ...
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  • What is a pipe clamp? How to install the pipe clamp?

    Pipe clamp is a common fitting for pipe fixing. On the ground mounted guide rail, the guide rail can be welded on the foundation or fixed with screws. Then push the guide rail nut into the rail, turn it 90 degrees, insert the lower half of the pipe clamp body into the nut, place the pipe to be fi...
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  • Functions Of Automobile Intake Manifold And Exhaust Manifold

    The exhaust manifold, which is connected with the engine cylinder block, collects the exhaust of each cylinder and leads it to the exhaust manifold, with divergent pipelines. The main requirements for it are to minimize exhaust resistance and avoid mutual interference between cylinders. When the ...
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  • Common Wrench Types

    In our daily life, wrench is a commonly used installation and disassembly tool. There are two kinds of spanners, dead spanner and live spanner. Common ones include torque wrench, monkey wrench, box wrench, combination wrench, hook wrench, Allen wrench, solid wrench, etc. 1. torque wrench: It can ...
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