The injection molding machine has the ability to form plastic products with complex shapes and precise dimensions or with metal inserts at a time. It is widely used in national defense, electromechanical, automotive, transportation, building materials, packaging, agriculture, culture, education, health and Everyday life of people. In the rapid development of the plastics industry today, injection molding machines occupy an important position both in quantity and variety, and their total production accounts for 20%-30% of the entire plastic molding equipment, thus becoming the fastest growing in the current plastic machinery, the number of production One of the most models. According to statistics, from 1996 to 1998, China exported 8383 sets of injection molding machines (sets), imported 42959 sets of injection molding machines (sets), of which China's output of injection molding machines reached 20,000 in 1998, and its sales accounted for the total sales of presses. 42.9%.