Cast molding apparatus

• US 5,965,170 A
• Filed: 10/09/1997
• Issued: 10/12/1999
• Est. Priority Date: 10/24/1996
• Status: Expired due to Fees

• Current Assignee: Shonan Design Co., Ltd.
• Original Assignee: Shonan Design Co., Ltd.
• Inventors: Matsuoka, Yasuhiko, Kita, Tarou
• Primary Examiner(s): DAVIS, ROBERT B
• Application Number:
  US08/948,031
• Time in Patent Office: 733 Days
• Field of Search: 425/253, 425/259, 425/405.1, 425/175, 425/174.4, 425/453, 164/256
• US Class Current: 425/174.4
• CPC Class Codes: B29C 2035/0827 using UV radiation
• CPC Class Codes: B29C 33/34 movable, e.g. to or from the moulding station
• CPC Class Codes: B29C 35/08 by wave energy or particle radiation B29C64/00, B29C71/04 take precedence
• CPC Class Codes: B29C 39/24 Feeding the material into the mould

Abstract

A molding apparatus includes a molding die having a cavity therein corresponding to the outer shape of a product to be reproduced, and a cast molding device for pouring an ultraviolet curable liquid resin into a cavity of the molding die. An ultraviolet light irradiating device is provided for irradiating ultraviolet light from the outside of the molding die, wherein the ultraviolet curable liquid resin in the interior of the molding die becomes hardened. A transport mechanism is provided for conveying the molding die between the cast molding device and the ultraviolet light irradiating device. Accordingly, an operator is not required to lift and carry the molding die, and the die can be swiftly and easily conveyed by means of the transport mechanism.

Claims

1. A cast molding apparatus, comprising:

a molding die having a cavity therein which corresponds to the outer shape of a product to be produced;

a cast molding device for charging an ultraviolet curable liquid resin, curable by exposure to ultraviolet rays, into the cavity of said molding die, said cast molding device comprising a cast molding chamber having an access opening;

an ultraviolet ray irradiating device for irradiating ultraviolet light from an outside of said molding die, thereby hardening said ultraviolet curable liquid resin in the interior of said molding die, said ultraviolet ray irradiating device comprising an ultraviolet light irradiation chamber having an access opening; and

a transport mechanism for conveying said molding die between said cast molding device and said ultraviolet ray irradiating device,

wherein at least one of said cast molding chamber and said ultraviolet light irradiation chamber is rotatable about a substantially vertical axis for changing a position of the access opening thereof.

2. The cast molding apparatus according to claim 1, wherein said cast molding device accommodates said molding die therein, and said cast molding chamber further comprising a vacuum chamber for enabling infusion of said ultraviolet curable liquid resin under a low pressure.

3. The cast molding apparatus according to claim 2, wherein said vacuum chamber includes a container which accommodates therein said ultraviolet curable liquid resin, further comprising an operative member extending to the outside of said vacuum chamber for tilting said container to pour said ultraviolet curable liquid resin into a funnel connected with said molding die.

4. The cast molding apparatus according to claim 3, further comprising a supply conduit connected to an upper part of said vacuum chamber through which said ultraviolet curable liquid resin is poured into said container.

5. The cast molding apparatus according to claim 4, wherein said supply conduit is connected to a reservoir tank via a pump.

6. The cast molding apparatus according to claim 2, further comprising a vacuum chamber driving means for enabling said vacuum chamber to be rotated in both clockwise and counter-clockwise directions about a vertical axis.

7. The cast molding apparatus according to claim 1, wherein said ultraviolet light irradiation chamber houses therein an ultraviolet lamp, and further comprising an ultraviolet light irradiation chamber driving means for enabling said irradiation chamber to be rotated in both clockwise and counter-clockwise directions about a vertical axis.

8. The cast molding apparatus according to claim 7, wherein said ultraviolet light irradiation chamber comprises a cylindrical housing disposed about a horizontal axis thereof, and further wherein said ultraviolet lamp comprises a plurality of straight tubular lamps disposed circumferentially along a longitudinal direction of said irradiation chamber.

9. The cast molding apparatus according to claim 1, wherein said transport mechanism comprises:

a first transport path continuing from an infusion position inside said cast molding device to an inlet/outlet opening of said cast molding device;

a second transport path continuing from an ultraviolet light irradiation position inside said ultraviolet light irradiating device to an inlet/outlet opening of said ultraviolet light irradiating device; and

a third transport path connecting said first and second transport paths.

10. The cast molding apparatus according to claim 9, wherein said third transport path comprises:

a main transport path extending in left and right directions between said cast molding device and said ultraviolet light irradiating device; and

an auxiliary transport path extending toward a frontal side, perpendicularly to said main transport path.

11. The cast molding apparatus according to claim 9, wherein said third transport path is slanted downwardly from said cast molding device toward said ultraviolet light irradiating device.

12. The cast molding apparatus according to claim 9, said transport mechanism further comprising a transparent plate transported along said first, second and third transport paths and supporting said molding die.

13. A cast molding apparatus comprising:

a molding die having a cavity therein which corresponds to the outer shape of a product to be produced;

a cast molding device for charging an ultraviolet curable liquid resin, curable by exposure to ultraviolet rays, into the cavity of said molding die;

an ultraviolet ray irradiating device comprising an ultraviolet light irradiation chamber for irradiating ultraviolet light from an outside of said molding die, thereby hardening said ultraviolet curable liquid resin in the interior of said molding die; and

a transport mechanism for conveying said molding die between said cast molding device and said ultraviolet ray irradiating device,

wherein said ultraviolet light irradiation chamber comprises a cylindrical housing disposed about a horizontal axis thereof, and containing an ultraviolet lamp comprising a plurality of straight tubular lamps disposed circumferentially along a longitudinal direction of said irradiation chamber.

14. A cast molding apparatus comprising:

a molding die having a cavity therein which corresponds to the outer shape of a product to be produced;

a cast molding device for charging an ultraviolet curable liquid resin, curable by exposure to ultraviolet rays, into the cavity of said molding die;

an ultraviolet ray irradiating device for irradiating ultraviolet light from an outside of said molding die, thereby hardening said ultraviolet curable liquid resin in the interior of said molding die; and

a transport mechanism for conveying said molding die between said cast molding device and said ultraviolet ray irradiating device,

wherein said transport mechanism comprises a first transport path continuing from an infusion position inside said cast molding device to an inlet/outlet opening of said cast molding device, a second transport path continuing from an ultraviolet light irradiation position inside said ultraviolet light irradiating device to an inlet/outlet opening of said ultraviolet light irradiating device, and a third transport path connecting said first and second transport paths, said third transport path comprising a main transport path extending in left and right directions between said cast molding device and said ultraviolet light irradiating device, and an auxiliary transport path extending toward a frontal side perpendicularly to said main transport path.

15. A cast molding apparatus comprising:

a molding die having a cavity therein which corresponds to the outer shape of a product to be produced;

a cast molding device for charging an ultraviolet curable liquid resin, curable by exposure to ultraviolet rays, into the cavity of said molding die;

an ultraviolet ray irradiating device for irradiating ultraviolet light from an outside of said molding die, thereby hardening said ultraviolet curable liquid resin in the interior of said molding die; and

a transport mechanism for conveying said molding die between said cast molding device and said ultraviolet ray irradiating device,

wherein said transport mechanism comprises a first transport path continuing from an infusion position inside said cast molding device to an inlet/outlet opening of said cast molding device, a second transport path continuing from an ultraviolet light irradiation position inside said ultraviolet light irradiating device to an inlet/outlet opening of said ultraviolet light irradiating device, and a third transport path connecting said first and second transport paths which is slanted downwardly from said cast molding device toward said ultraviolet light irradiating device.

16. A cast molding apparatus comprising:

a molding die having a cavity therein which corresponds to the outer shape of a product to be produced;

a cast molding device for charging an ultraviolet curable liquid resin, curable by exposure to ultraviolet rays, into the cavity of said molding die;

an ultraviolet ray irradiating device for irradiating ultraviolet light from an outside of said molding die, thereby hardening said ultraviolet curable liquid resin in the interior of said molding die;

a transport mechanism for conveying said molding die between said cast molding device and said ultraviolet ray irradiating device,

wherein said transport mechanism comprises a first transport path continuing from an infusion position inside said cast molding device to an inlet/outlet opening of said cast molding device, a second transport path continuing from an ultraviolet light irradiation position inside said ultraviolet light irradiating device to an inlet/outlet opening of said ultraviolet light irradiating device, a third transport path connecting said first and second transport paths, and a transparent plate supporting said molding die and transported along said first, second and third transport paths.