US 8,911,225 B2Granted

Compression-molding apparatus and compression-molding method

AssigneeToyo Seikan Kaisha, Ltd.

InventorsYutaka Asano, Norihisa Hirota, Jotaro Nagao

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Abstract

[Problem] To suppress the deviation of a synthetic resin to be fed to a metal mold and to enable the to-be-compression-molded synthetic resin to be easily molded into a shape of a pre-molded article that is to be molded. [Means for Solution] A female mold 31 includes a moving rod 34 and female mold body 33 surrounding the moving rod 34, the female mold body 33 forming a cavity 33a that is opened upward, the moving rod 34 moving up and down between a normal position and an elevated position above the normal position, and when a synthetic resin 8 is to be fallen down from the a synthetic resin cutting/holding unit 14, the moving rod 34 moves to the elevated position so that the synthetic resin 8 falls down on the upper surface of the center member.

Claims16

Dependent claims

A compression-molding apparatus comprising:

a female mold member comprising a centrally disposed member and a circumferential member surrounding the centrally disposed member;
the centrally disposed member and the circumferential member defining an upwardly open recessed molding portion when an upper surface of the centrally disposed member is disposed in a first position;
a male mold member arranged over the female mold member and that can move up and down relative to the female mold member;
the male mold member being movable into a closed position so as to define a molding space in cooperation with the female mold member and to an open position wherein the male mold member is spaced away from the female mold member;
a cutting/holding unit:
positionable between the male mold member and the female mold member when the male mold member is in the open position;
being structured and arranged to hold a synthetic resin material and to feed the synthetic resin material into the female mold member;
comprising a jet nozzle producing a gas stream;
and
comprising a holding member for holding the synthetic resin material, wherein the holding member has a lower end that includes a flared section that is flared downwardly so as to allow the synthetic resin material to be premolded while held by the holding member,
the upper surface of the centrally disposed member being disposed at a second position higher than the first position when the synthetic resin material is fed from the cutting/holding unit,
wherein, prior to the synthetic resin material being fed to the female mold member, the synthetic resin material is forced into the holding member by the gas stream and held in the holding member and premolded via the flared section and a gas stream, and
wherein, after the synthetic resin material is premolded, the synthetic resin material is positioned onto the upper surface of the centrally disposed member.

10 more elements

A compression-molding apparatus comprising:

a female mold member comprising a centrally disposed member and a circumferential member surrounding the centrally disposed member;
the centrally disposed member and the circumferential member defining an upwardly open recessed molding portion when an upper surface of the centrally disposed member is disposed in a first position;
a male mold member arranged over the female mold member and that can move up and down relative to the female mold member;
the male mold member being movable into a closed position so as to define a molding space in cooperation with the female mold member and to an open position wherein the male mold member is spaced away from the female mold member;
a cutting/holding unit:
positionable between the male mold member and the female mold member when the male mold member is in the open position;
being structured and arranged to hold a synthetic resin material and to feed the synthetic resin material into the female mold member;
comprising a push-down member;
and
comprising a holding member for holding the synthetic resin material, wherein the holding member has a lower end that includes a flared section that is flared downwardly so as to allow the synthetic resin material to be premolded while held by the holding member,
the upper surface of the centrally disposed member being disposed at a second position higher than the first position when the synthetic resin material is fed from the cutting/holding unit,
wherein, prior to the synthetic resin material being fed to the female mold member, the synthetic resin material is pushed down with the push-down member and premolded.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/677,574Filed 23 Oct 2008
Priority: JP 2007-27601724 Oct 2007
Published: US 2010/0201032 A112 Aug 2010
Granted: 16 Dec 2014
Term ends: Not estimatedThe source records don’t support an estimate.

Classification18 codes

B29C 31/048
Using dispensing heads, e.g. extruders, placed over or apart from the moulds: the material being severed at the dispensing head exit, e.g. as…
B29C 43/34
Component parts, details or accessories; Auxiliary operations: feeding the material to the mould or the compression means
B29C 49/0685
Combined blow-moulding and manufacture of the preform or the parison: compression blow-moulding
B29B 11/12
By moulding the material: compression moulding