To provide a continuous body having multiple parts, each of which has different physical properties, and to provide a method for manufacturing the same, or the like.
The invention provides how injection molding may be used to form the continuous body having the multiple parts, each of which has different physical properties such as magnetic characteristics or hardness. This is accomplished through the careful control of the relative shrinkage rates of these various parts. Additionally, care is taken to ensure that only certain selected physical properties are allowed to differ between the parts while other properties may be altered through relatively small changes in the composition of materials used. An additional application of the invention is a method for forming, in a single integrated operation, an article contained within an enclosure while not being attached to the enclosure. This is accomplished by causing the shrinkage rate of the article to be substantially greater than that of the enclosure.
TAN LYE-KING
TAN ENG-SENG
BAUMGARTNER ROBIN
| JPH05195022A | 1993-08-03 | |||
| JPH05208405A | 1993-08-20 | |||
| JP2000156314A | 2000-06-06 | |||
| JPS57100707A | 1982-06-23 | |||
| JPH01238109A | 1989-09-22 | |||
| JPS61140503A | 1986-06-27 | |||
| JPS61208812A | 1986-09-17 | |||
| JPS6448016A | 1989-02-22 | |||
| JPH0529131A | 1993-02-05 | |||
| JPH0247009A | 1990-02-16 |
Kazuo Shamoto
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita