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Title:
MOLD FOR MOLDING AND ITS MANUFACTURE
Document Type and Number:
Japanese Patent JPH115220
Kind Code:
A
Abstract:

To facilitate aligning of a split mold in the case of using the mold and to enhance sealability of parting surfaces, by forming irregular protrusions and recesses to be engaged with one another at the time of mating the mold on substantially overall areas of the parting surfaces of the mold.

A splitting step of splitting an integral mold and taking out an original mold 10 embedded therein is executed. A cutter 30 is horizontally traveled at a position where an end of a tab 18 is projected as a standard to split the mold into an upper mold 26 and lower mold 28. Protrusions and recesses 32 coincident with each other at the time of mold mating are provided substantially on overall areas of the parting surfaces of the molds 26, 28, i.e., the parting surface 26a of the mold 26 and parting surface 28a of the mold 28. With the tab 18 as the standard, in the case of splitting the integral mold by using the cutter 30, the cutter 30 is not completely horizontally but alternately upward and downward inclined, i.e., traveled in a zigzag way to form a groove row extending in a direction perpendicular to the traveling direction of the cutter.


Inventors:
TAKAYAMA HIROKAZU
OGAWA TOSHIYUKI
Application Number:
JP17758197A
Publication Date:
January 12, 1999
Filing Date:
June 18, 1997
Export Citation:
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Assignee:
EBARA CORP
International Classes:
B22C7/02; B29C33/38; B29C33/40; B29C33/42; (IPC1-7): B29C33/42; B22C7/02; B29C33/38
Attorney, Agent or Firm:
渡邉 勇 (外2名)



 
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