Joen Lih Machinery Co., Ltd.

High-precision Grinders

Founded in 1988, Joen Lih Machinery Co., Ltd. Produces various types of surface grinders, including high-precision CNC profile-surface grinders, hand-operated surface grinders, and semi-automated precision-surface grinders. Over the past few years, the company has been making an emphatic effort to upgrade its production technology to make the most sophisticated machines possible, says H.T. Lin, president of the company.

Recently the firm debuted a new line of high-precision wafer-grinding machines for the high-tech industry. The models inherit much from the firm's vertical-grinding machines in terms of design. A diamond-outfitted grinding wheel is fitted to the floating spindle, and the machines perform vertical grinding on hard and brittle workpieces requiring the highest degree of surface accuracy and flatness. One example of this is the use of water-based surface grinding in semiconductor manufacturing, which plays a key role in determining minimum wafer dimensions.

Beyond wafers, the machines are designed for use with ceramics, quartz, glass, and gems. The motor of the machine is built in the air-floating spindle. Variable spindle speeds range from 1,000 to 5,000rpm. The air-floating table meets rigorous requirements for grinding accuracy. The rapid traverse rate is 300 mm/min, and a powerful Fanuc Oi-series controller provides full digital control.

The wafer-grinding machine comes with a diamond-outfitted grinding wheel, ceramic vacuum suction table, spindle temperature controller, vacuum pump, and toolbox. There is also an optional precision air dryer, height gauge, and high-precision spindle. The machine is equipped with a high-performance temperature controller, employs a highly efficient plate-type heat exchanger, and has a comprehensive safety protection device to ensure safe operation. The optional air dryer removes dust in the compressed air and has highly accurate pressure and temperature control.

Joen Lih mainly sells the high-precision wafer surface grinding machines to Southeast Asian countries, the United States, and Canada.

This year the company will display its products at TIMTOS Taipei International Machine Tools Show from March 15 to 20 March, and EMO World of Metalworking in Hanover, Germany, from September 14 to 21 September.

Located in Taichung, central Taiwan, the firm has two manufacturing plants and a total floor area of 350 pings (one ping is approximately 36 sq. ft.). Joen Lih has a workforce of 40.

Joen Lih Machinery Co., Ltd.

TEL: 886-4-2534-9475

FAX: 886-4-2533-9001

E-mail: joenlih@ms14.hinet.net

http://www.joenlih.com.tw