Plastic screws in large quantities
Plastic screws (plastic screws), also known as plastic screws, commonly used in domestic plastic screws for thermosoluble injection molding and become, according to the main material to be divided into: nylon PA66 screws, PP screws, PVC screws PE screws, etc., the characteristics of the material is different, so the scope of application is also different. There is also a difference in the scope of application.
By material
Nylon screws, PC screws, PVDF screws, PP screws, PTFE screws, etc.
By type of screw head
According to the shape of the head can be divided into: pan head plastic screws, countersunk plastic screws, plastic screws with hexagonal socket, plastic screws with hexagonal socket, plastic set screws, etc.
According to the shape of the slot can be divided into: cross, one (one), one (one). can be divided into: cross, a word (slotted), hexagonal, meters, plum, etc.
By thread specifications
Metric thread M2,M2.5,M3,M4,M5,M6,M8,M10,M12
American thread 2-56,4-40,6-32,8-32,10-32
According to the above different classifications can be Combination of many different types of plastic screws
Plastic screws performance indicators editor
The most important physical performance indicators:
1. Head and screw combination of anti-twisting
2. Head groove, especially the head of the cross is whether the head of the screwdriver to match the standard head size.
3. The outer diameter, middle diameter and bottom diameter of the threads of plastic screws are standardized. This standard is not as strict as that of metal screws due to the water absorption of different plastics, which leads to size differences under different usage environments.
The most important chemical performance indicators
1. acid resistance
2. alkali resistance
3. fire rating
4. insulation
Plastic Screws Advantages
1. Compared with ordinary metal screws, plastic screws, the biggest advantage is that he has a good insulating properties, non-conductive.
2. In addition, because of non-metallic manufacturing, in the current or other electrical signals under the influence of eddy currents and other signals will not produce interference, and its anti-interference a little bit suitable for communication and other industries. 3. Plastic screws acid and alkali resistance is better, which the best PVDF screws followed by polypropylene, both have strong acid and alkali resistance, and nylon screws compared to the first two, resistance to strong acid and alkali performance is relatively poor, so in some of the electroplating industry of strong acid and alkali environments, plastic screws, especially PVDF screws have a very wide range of applications
Plastic screws defects editor
1. The biggest defect of plastic screws is that ordinary plastic screws torque and strength is not as common as metal screws, torque is too large a slippery tooth or head fracture may be.
2. Due to different plastic molding shrinkage reasons, temperature and humidity changes as well as the length of the molding cycle and other reasons lead to plastic screws size error tolerance. In addition, due to the soft material of ordinary plastic, can not use the conventional ring gauge measurement method.
Plastic screws in the field of application editing
Plastic screws have insulation, non-magnetic, corrosion resistance, beautiful, never rust and other high-quality characteristics, and modified engineering plastics, its use of strength, impact resistance and comparable to the metal, we often say that plastic screws commonly known as nylon screws added 30% glass fiber, its mechanical properties are far superior to the ordinary nylon, plastic screws adopted by the Plastic screws are increasingly diversified materials, continuous improvement in performance, the application field is also more and more broad.
1, medical equipment industry (insulation, non-magnetic, environmental protection, anti-interference signal, so that the use of medical machinery and equipment safer)
2, wind power industry (chassis circuit PCB board isolation, insulation)
3, aerospace industry (electronic equipment insulation, anti-interference signals)
4, office equipment industry (never rust, beautiful and practical)
5, the use of plastic screws is a very important factor in the development of the industry.
5, petrochemical industry (high temperature resistance, chemical resistance, corrosion resistance, to extend the service life of the equipment)
6, electronics industry (insulation, anti-interference, light weight)
7, communications industry (insulation, non-magnetic, safety)
8, marine industry (acid, alkali, corrosion resistance, to extend the service life of the ship) and so on ...
The specifications of plastic screws, complete sizes to meet the needs of different occasions.