Method for manufacturing injection-molded body
AssigneeKaneka Corporation
InventorYoshiaki Matsuoka
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Abstract
This invention has an object to provide a method for manufacturing an injection-molded product of a resin composition containing a P3HA-based resin, the method enabling stable continuous production without generating flash. This object is attained by the method for manufacturing, with use of a mold apparatus, the injection-molded product of the resin composition containing the P3HA-based resin, the method including the step of: before filling a mold with the resin composition by injection, carrying out pressure reduction by reducing a gage pressure inside a cavity of the mold so as to be not more than −0.02 MPa, the mold apparatus including the mold which has a parting line being in contact with the cavity in the mold and having a maximum width which is not more than 50 μm when the mold is closed.
Claims20
A method for manufacturing an injection-molded product of a resin composition comprising a poly(3-hydroxyalkanoate)-based resin, using a mold apparatus comprising a mold,
- the method comprising:
- carrying out pressure reduction by reducing a gage pressure inside a cavity of the mold such that the gage pressure is −0.02 MPa or less, and filling the mold with the resin composition by injection,
- wherein the mold has a parting line being in contact with the cavity in the mold, and the parting line has a maximum width of 50 μm or less when the mold is closed.
Dependencies are inferred from the claim text.