Guidelines for Thermoplastic Injection Molding Processing
Thermoplastic Injection Molding
Details
Details:
Model
Material
Brand
Origin
Application
Booling-Injection-15
P20, 718, S136, 2738 etc
Booling
China
Automotive parts, industrial parts, medical parts, household
Thermoplastic injection molding technology is the most common processing technique, and using this technology in the production of plastic products can reduce waste during the processing. Waste can be recycled and reused, which is in line with the concept of sustainable development.
Advantages of Thermoplastic Injection Molding：
- Good Plasticity
- Easy toForm
- Recyclable
- High Precision
- High Flexibility
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Thermoplastic injection molding is the most common injection molding technology, which has been widely used in multiple fields due to its significant advantages and particularities. The basic principle of thermoplastic molding is mainly to heat and melt the plastic material, and then inject the melted plastic into the closed mold under high pressure through the screw of the injection molding machine. After cooling and solidification, the desired custom injection molding parts are obtained.
Identification Methods for Thermoplastic Materials
In general, thermoplastic materials used for injection molding are divided into two categories: crystalline and amorphous. Crystalline plastics generally have a semi-transparent, opaque, or milky appearance, and common ones include PP, PE, nylon, etc; Amorphous plastics are generally colorless, and common ones include ABS, PVC, etc. The following are the identification methods for general thermoplastic plastics:
- Density Identification of Plastics
Manufacturers can use density measurement methods to distinguish the type of plastic. Because the density of different types of plastic also varies. Different from ordinary plastics, the density of foamed plastics is not the real density of materials, so this kind of plastic should be separated from conventional plastics during identification. This density measurement method is very common in industrial applications.
- Heating Identification of Plastics
Heating is one of the most commonly used methods for identifying conventional plastics. Thermoplastic materials are prone to softening and melting when heated, often in a transparent state during melting, and the melt is prone to drawing. These materials are usually easy to heat seal. Thermosetting plastics maintain their original hardness without softening after heating until they undergo chemical decomposition and carbonization when heated to a certain degree. When the elastomer is heated, it does not flow until it reaches the chemical decomposition temperature, at which point carbonization occurs.
- Identification of Solvent Treatment for Plastics
When manufacturers identify plastics, they can put the plastic in a solvent. Thermoplastic materials swell in solvents, but are generally insoluble in cold solvents; In hot solvents, some thermoplastic materials may dissolve, such as polyethylene dissolved in xylene. Thermosetting plastics do not dissolve in solvents and generally only experience slight swelling or even no swelling. Although elastomers may swell, they are generally insoluble in solvents.
- Identification of Plastic Combustion Test
The combustion test identification method is a method used by manufacturers to observe the combustion performance of plastic samples during and outside of fire by burning them on a small flame; In addition, manufacturers need to be aware that when using this method for identification, they should pay attention to the odor and droplet form of the molten plastic after extinguishing the engine.
Advantages of Thermoplastic Injection Molding
The advantages of thermoplastic injection molding include but are not limited to:
- The Products Produced Have High-Precision
Products made using thermoplastic injection molding technology have high precision. It has high reliability and safety performance, is not easy to wear out, and has a long service life.
- Widespread Use of Materials
Thermoplastic injection molding has a wide range of material choices and flexible manufacturing methods, which can be widely used in the entire industry because they are easily available in the market. Thermoplastic materials are not as scarce as thermosetting plastics, and in industrial manufacturing, they are usually used to shape parts.
- Efficient Surface Treatment
Thermoplastic has high compatibility and can be used together with other advanced resins that meet the requirements of injection molding manufacturing. One of the most prominent benefits of thermoplastic injection molded products is their excellent surface finish and easy surface treatment.
- Cost-effective
Most thermoplastic materials are reshaped, and defective products can be recycled and reused, which makes them cost-effective in injection molding and reduces manufacturing costs.
- Sustainable Development
Thermoplastic is not only a high-quality production material but also in line with the concept of sustainable development for any industry.
Common Thermoplastic Injection Molding and Applications
There are various types of thermoplastic materials used for injection molding, including:
- Polycarbonate (PC)
-Characteristics
Polycarbonate has superior mechanical properties, high impact strength, high strength and elasticity coefficient, good fatigue resistance, flame retardancy, small creep, good dimensional stability, wide temperature range of use, good heat aging resistance, excellent insulation performance, and oxidation resistance.
-Application
The three major application areas of PC thermoplastic injection molding are the automotive industry and electronics, the glass assembly industry, and the electrical industry. In addition, there is office equipment such as packaging, industrial machinery parts, CDs, and computers, as well as some films, medical and health care, leisure, and protective equipment. In addition, polycarbonate injection molding can be used for the manufacturing of door and window glass. PC laminates are widely used for protective windows in embassies, banks, detention centers, and some public places with higher protection levels. They are also often used for aircraft cabin covers, lighting equipment, industrial safety barriers, and bulletproof glass. Polycarbonate injection molding is suitable for producing various components of cars and light trucks, mainly focused on instrument panels, lighting systems, heating plates, defrosters, and polycarbonate alloy bumpers, providing multiple solutions for the manufacturing of the automotive industry.
- Nylon
-Characteristics
The most prominent advantage of nylon material is its high wear resistance, which is significantly higher than all other fibers. Its wear resistance is 10 times that of cotton and 20 times that of wool. Manufacturers can greatly improve the wear resistance of blended fabrics by adding some polyamide fibers during processing. When the material is stretched to 3-6%, the elastic recovery rate can reach 100%; This material can be bent tens of thousands of times without breaking.
-Application
Cast nylon can widely replace wear-resistant parts of mechanical equipment, replace copper and alloys as wear-resistant parts of equipment, and is suitable for various types of equipment. Nylon is widely used in industry to manufacture cords, industrial fabrics, cables, conveyor belts, tents, fishing nets, and more. In daily life, nylon can be blended or spun into various medical and knitted products. Nylon filament is commonly used in the knitting and silk industry, such as weaving various wear-resistant nylon stockings such as single stockings and elastic stockings. Nylon short fibers are mostly used to blend with wool or other chemical fibers to make various wear-resistant and durable fabrics, which are highly favored by consumers.
- Polytetrafluoroethylene (PTFE)
-Characteristics
Polytetrafluoroethylene is a thermoplastic with high-temperature resistance, corrosion resistance, excellent electrical insulation, aging resistance, low water absorption, and excellent self-lubricating properties. It is also a universal lubricating powder suitable for various media. Can be quickly applied to form a dry film, and used as a substitute for molybdenum, graphite, and other inorganic lubricants. Suitable for release agents of thermoplastic and thermosetting polymers, with excellent load-bearing capacity. It has been widely used in the elastomer and rubber industries.
-Application
PTFE is used as an insulation layer for power and signal lines in industries such as aerospace, aviation, electronics, instrumentation, and computers, and is widely used in the production of electrical industries. Due to its corrosion-resistant and wear-resistant material properties, it can be used to make thin films, bearings, gaskets, pipe plates and rods, valves, chemical pipe fittings, pipelines, equipment container liners, etc., and has a wide range of application performance.
The advantages of thermoplastic in injection molding are very prominent, which has prompted more manufacturers to choose this injection molding method.
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