Molding die and molding method
AssigneeDiamet Corporation
InventorsTsuneo Maruyama, Yoshiki Tamura, Hideo Sakai
Life of this patent
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Abstract
The molding die of the invention includes: a first die having a through-hole; a second die inserted into the through-hole and capable of moving relative to the first die; and a first punch and a second punch each insertable into the through-hole. A cavity surrounded by the second die, the first punch, and the second punch to compression-mold a molding object is formed in the through-hole. An undercut molding part is formed in the surface of the second die facing the cavity. The second die is formed so as to be splittable into two or more split bodies.
Claims8
A molding die comprising:
- a first die having a through-hole and an opening at one end of the through-hole;
- a second die that is configured to be inserted into the through-hole from the opening in an insertion/removal direction of the second die and is movable relative to the first die;
- and
- a first punch and a second punch each insertable into the through-hole,
- wherein a cavity is formed in the through-hole, said cavity being surrounded by an inner wall surface of the second die, a pressing surface of the first punch and a pressing surface of the second punch to compression-mold a molding object,
- wherein an undercut molding part is formed in the inner wall surface of the second die facing the cavity and includes an uneven shape portion extending in a direction intersecting the insertion/removal direction of the second die,
- wherein the second die is formed so as to be splittable into two or more split bodies,
- wherein the undercut molding part is configured to provide an undercut shape to a green compact,
- wherein the uneven shape portion represents a shape that protrudes or is indented by a certain angle from the insertion/removal direction of the second die, and
- wherein the second die and the first punch are configured such that the first punch is fitted into the second die, and that the first punch and the second die are simultaneously inserted into the through-hole from the opening of the first die.
A molding die comprising:
- a first die having a through-hole and an opening at one end of the through-hole;
- a second die that is configured to be inserted into the through-hole from the opening in an insertion/removal direction of the second die and is movable relative to the first die;
- and
- a first punch and a second punch each insertable into the through-hole,
- wherein a cavity is formed in the through-hole, said cavity being surrounded by an inner wall surface of the second die, a pressing surface of the first punch and a pressing surface of the second punch to compression-mold a molding object,
- wherein an undercut molding part is formed in the inner wall surface of the second die facing the cavity,
- wherein the second die is formed so as to be splittable into two or more split bodies, and
- wherein the second die and the first punch are configured such that the first punch is fitted into the second die, and the first punch and the second die are simultaneously inserted into the through-hole from the opening of the first die.
Dependencies are inferred from the claim text.