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Automotive Plastic Helical Gear High Precision And High Strength

May 17, 2017

Automotive Plastic Helical Gear are moving towards larger sizes, more complex geometries, and higher strength, while high performance resins and long fiberglass filled composites play an important role in promoting.

Automotive Plastic Helical Gear have undergone a change from new materials to important industrial materials over the past 50 years. Today they have penetrated into many different applications, such as cars, watches, sewing machines, structural control facilities and missiles, etc., to play the role of torque and movement. In addition to the existing application areas, the new, more difficult to work gear applications will continue to appear, this trend is still in-depth development.

The automotive industry has become one of the fastest growing areas of plastic gear, and this success is encouraging. Car manufacturers are trying to find a variety of automotive-driven auxiliary systems, they need a motor and gear, rather than power, hydraulic or cable. This change allows Automotive Plastic Helical Gear to be used in many applications, from lift doors, seats, tracking headlights to brake actuators, electric throttle sections, turbine mediators, and more.

The application of plastic power gear is further widened. In some large-scale applications, Automotive Plastic Helical Gear are often used to replace metal gears, such as the use of plastic washing machine transmission, etc., which changes the gear in the application of the limits of size. Automotive Plastic Helical Gear are also used in many other areas, such as ventilation and air conditioning systems (HVAC) damping drives, valve drives in mobile facilities, automatic sweeper in common lounges, and controllable surface-powered dynamic helices for small aircraft Equipment, military field in the field of the mound and control devices.

Large size, high strength plastic gear

This is an important reason for the development of Automotive Plastic Helical Gear due to the advantages of plastic gear molding and the ability to shape larger, high precision and high strength characteristics. Early plastic gear development trend is generally less than 1 inch span, the transmission capacity of not more than 0.25 horsepower spur gear. Now gears can be made into many different structures, transmission power is generally 2 horsepower, diameter range of 4-6 inches. It is predicted that by 2010, the plastic gear forming diameter can reach 18 inches, the transmission capacity can be increased to 10 horsepower or more.

How to design a gear configuration, in the transmission power to maximize the same time to send errors and minimize noise, but also faced with many problems. This poses a high degree of precision machining requirements for concentricity, tooth profile and other characteristics of the gears. Some helical gears may require complex molding operations to produce the final product, and the other gears need to use the core teeth in the thicker part to reduce shrinkage. While many molding experts use the latest polymer materials, equipment and processing technology to achieve the ability to produce a new generation of Automotive Plastic Helical Gear, but for all processors, will face a real challenge is how to cooperate with the manufacture of the entire high-precision product.

The difficulty of control

The tolerances of high-precision gears are generally difficult to describe with the "good" described by the American Plastics Industry Association (SPI). But today most molding specialists use the latest molding machines with machining control units to control the precision of forming temperature, injection pressure, and other variables to form precision gears on a complex window. Some gearmaking specialists use more advanced methods in which temperature and pressure sensors are placed in the cavity to improve molding consistency and repeatability.