Last updated : 04/01/2020
Sigma Ltd.
- President
- Toshitaka SHITANAKA (Mr.)
- Year established
- 1962
- Capital
- 45,000,000 yen
- Sales
- 4,250,000,000yen(as of April,2013)
- Employees
- 200
- Postal (zip) code
- 737-0012
- Company address
- 9-2-28 Kegoya, , Hiroshima-ken Kure-shi
- Phone
- 0823-28-0121
- Fax
- 0823-28-4326
- E-Mail
- market@sigma-k.co.jp
- URL
- http://www.sigma-k.co.jp/
Company PR
With a variety of forming technologies centered around cold forging, Sigma combines multiple forging techniques to offer optimum design and high-efficiency production. Sigma responds to customers' needs in all areas of forming, cutting/grinding and electric/electronic technology.
Major Products
- Automobile AT/MT precision components
- Inflator components
- Resin cases and connectors
- Security products (security cameras, shoplifter prevention system)
- Laser Inspection System
Major Customers
- Mazda Motor Corp.
- Microtechno, Co., Ltd.
- Asmo Co., Ltd
- Daicel Chemical Industries, Ltd.
Major Facilities/Equipment
- Cold header 17
Parts former, 4D4B, 2D3B, 2D2B, 1D2B
- Press 21
3 t, 5 t, 10 t, 60 t, 250 t, 630 t
- Form rolling machine 25
Roll Plastic Process Machinery, circular rollings
- Injection molding machine 12
Horizontal type: 280 t, 180 t, 150 t, 110 t, 75 t, 60 t, Vertical type: 70 t, 30 t
- NC lathe 58
Chuck type NC
Technology Employed
- Transportation machinery/equipment manufacturing industry
- Has eliminated grinding by achieving header die spindle precision of 20 micron meter.
- Transportation machinery/equipment manufacturing industry
- Performs chipless processing through roll forming.
- Transportation machinery/equipment manufacturing industry
- Provides services covering the design, manufacture, and product design of molds. Also handles precision forming of heat plasticizing resins.
- Transportation machinery/equipment manufacturing industry
- Forms various types of gears via the cold forging press.
Primary Area of Technical Expertise
Precision cutting/grinding technology combined with various forming technologies centered around precision cold forging, roll forming and injection molding of small parts, allow Sigma to develop functional products on the basis of its technological capabilities.
Future Business Challenges
- Development of functional products through the combination of various types of forming technologies
Future Technical Challenges
- Transportation machinery/equipment manufacturing industry
- Manufacturing of low-cost parts, establishing a line to produce cold forging and rolling products simultaneously.
- Transportation machinery/equipment manufacturing industry
- Pursuit of single micron level precision through super header technology.
Other
Patent applications: Approximately 80 (55 of these are products developed independently by our company.)
Technologies and items currently being developed based on these patent applications:
(1) Flaw detection equipment using laser light
(2) Molding technology for electromagnetic radiation protection and electric plastic
(3) Molding technology for environmentally-friendly biodegradable plastic
(4) Molding technology for hybrid phenol plastic
