In order to produce plastic parts with high dimensional accuracy, injection molding machines are increasingly electrically driven. The electric press is superior to the traditional hydraulic type in that it is cleaner and uses less energy. Demand for it is growing in proportion to the need to respond to environmental issues.
With the shift to electric injection molding, customers now demand reliability in much harsher environments. NSK's high load capacity products are important parts, essential for mechanical drive parts, including the:
Ball screws for high-load drives are one product NSK manufactures for injection molding machines. The arrangement of the circulation channels has been optimized, the diameter of the balls has been made as large as possible, and the ball groove has been designed especially for high loads. The ball screws have a greatly improved the load capacity.
Also, in support of these ball screws for high-load drives, NSK offers high load-bearing capacity ball screw support angular contact thrust ball bearings (for injection molding machines) that use large diameter balls, and roller guides produced with NSK's leading edge technologies and featuring high load capacity, high rigidity and the ability to be used in controlled clean environments. NSK is contributing to the future of injection molding machines as the only manufacturer that offers a comprehensive development and sales service for essential mechanical parts.
Looking at the history of the development of electric injection molding machines, in 1996 NSK released the HTF Series of ball screws for high speeds and heavy loads, which greatly increased the rated load and the maximum permissible load. In 2000 the company announced the TAC-HR Series of ball screw support angular contact thrust ball bearings in support of the HTF Series. NSK employed the roller bearings in earlier years, however it is promoting the changeover to angular contact ball bearings that have realized higher speeds, and greater ease of assembly than the roller bearings.
Concerning responses to the environmental concerns of recent years, in 2007 NSK announced the launch of the A1 Series of grease retaining, high-speed, high-capacity ball screws, which are beneficial to the environment, as well as enabling a reduction in the amount of lubricant required.
Next-generation Ball Screws for heavy load applications, evolved from the best-selling HTF Series of high-load Ball Screws.
Quiet and compact, with unparalleled high-speed performance. Low-noise BSS Series Ball Screws are suitable for an extensive range of uses, from transportation equipment to machine tools.