To provide a mold capable of molding into a molded article with a cylindrical core body by surely discharging air near the top end part and without generating end face burrs.
Insert molds 12 and 22 with fitting hole parts 14 and 24 at the centers are respectively provided in mold-closable top mold 10 and bottom mold 20. A supporting pin 25 fitted and locked to the cylindrical core body 1 is provided in the fitting hole part 24 on the lower side, and a core body presser foot 15 is provided in the fitting hole part 14 on the upper side, to form a cavity 30 on the outer periphery of a cylindrical core body 1 under the condition that the mold is closed, and in the mold, a molding material is filled in the cavity and molded. A seal ring 16 is provided in the fitting hole part 14 in the top side inserting mold 12 so that it is fitted into the fitting hole part 14 while air permeability is slightly held to the outer periphery of the upper end part of the cylindrical core body 1. An feeding hole 33 for the molding material, and a relief hole 35 for air and the molding material are provided on the top mold 10.
TSUJIMOTO YOSHIKAZU
IWAI TAKEO
| JPH0528020B2 | 1993-04-23 | |||
| JPH08155962A | 1996-06-18 | |||
| JPH07276382A | 1995-10-24 | |||
| JPH09507183A | 1997-07-22 | |||
| JPH11192640A | 1999-07-21 | |||
| JPH02155711A | 1990-06-14 |
Masato Tsuda
Tetsuji Nakamura
Katsuyuki Tomita