Method for producing foam molded product and molding mold
AssigneeInoac Corporation
InventorsHiroshi SUZUKI, Takatoshi SUZUKI
Life of this patent
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Abstract
The present invention relates to a method for producing a foam molded product, in which in a foaming step, at least a part of a burr is made to be an undercut that is caught in a movable mold portion when mold opening the movable mold portion, in a cross section obtained by cutting a foam intermediate on a plane orthogonal to a direction in which a boundary between a main body and a burr extends, a fragile portion is provided at the boundary such that at least a part of the burr located near the boundary is narrowed toward the boundary, and a foam intermediate is formed, and in a removal step, the fragile portion is broken and the burr is removed by pulling the burr with the movable mold portion.
Claims8
A method for producing a foam molded product, comprising:
- a foaming step of foam-molding a foam intermediate including a main body and a burr from a foam raw material in a cavity defined by a first mold portion and a second mold portion;
- and
- a removal step of removing the burr from the foam intermediate by moving the second mold portion in a predetermined mold opening direction to obtain a foam molded product, wherein
- in the foaming step,
- at least a part of the burr is made to be an undercut that is caught in the second mold portion when mold opening the second mold portion,
- a fragile portion is provided at a boundary between the main body and the burr such that in a cross section obtained by cutting the foam intermediate on a plane orthogonal to a direction in which the boundary between the main body and the burr extends, at least a part of the burr located near the boundary is narrowed toward the boundary, and
- the foam intermediate is molded, and
- in the removal step,
- the fragile portion is broken and the burr is removed by pulling the burr with the second mold portion.
A molding mold comprising:
- a first mold portion;
- and
- a second mold portion, wherein
- the molding mold is configured to be brought from a mold closed state into a mold open state by moving the second mold portion in a predetermined mold opening direction with respect to the first mold portion, and in the mold closed state, a cavity including a main body region and a burr region is defined by the first mold portion and the second mold portion,
- the molding mold is configured to mold a foam intermediate in the cavity, the foam intermediate including a main body and a burr,
- the first mold portion includes a first wall portion extending to a burr region side from a first portion forming a boundary between the main body region and the burr region in the mold closed state,
- the second mold portion includes a second wall portion facing the first wall portion in the mold closed state,
- the second wall portion includes a concave portion recessed in a direction intersecting the mold opening direction and forming a gap with the first wall portion in the mold closed state,
- the concave portion includes an inclined portion communicating with a second portion of the second mold portion forming the boundary in the mold closed state, and
- the inclined portion is inclined with respect to the first wall portion so as to be separated from the first wall portion as separated from the boundary in the mold closed state.
Dependencies are inferred from the claim text.