Casting machine

Patent metadata

Field	Value
Publication number	US-9545667-B2
Application number	US-201414229094-A
Country	US
Kind code	B2
Filing date	Mar 28, 2014
Priority date	Mar 28, 2013
Publication date	Jan 17, 2017
Grant date	Jan 17, 2017

Abstract

A casting machine having a furnace body, a first heater, a first surface and pressure means. The furnace body has a melting portion and a holding portion, material being supplied and melted to form the molten metal in the melting portion, the holding portion holding the molten metal which has flowed out from the melting portion. The first heater heats the material supplied to the melting portion to melt it. The first surface is provided on a hearth surface of the melting portion and has concavities and convexities, the material to be heated being laid on the first surface.

First claim

What is claimed is:

1. A casting machine for pouring molten metal into a die, the machine comprising:
a furnace body having a melting portion and a holding portion, material being supplied and melted to be the molten metal in the melting portion, the holding portion holding the molten metal which has flowed out from the melting portion;
a first heater heating the material supplied to the melting portion to melt;
a first surface provided on a hearth surface of the melting portion and having concavities and convexities, the molten metal flowing out from the melting portion flows transversely over the concavities and convexities of the first surface; and
pressurizing unit that pressurizes the molten metal to be forced into the die.

2. The casting machine according to claim 1 , further comprising a communicating passage connected between the first surface and the holding portion, the communicating passage having a bottom surface on which the molten metal flows, the bottom surface being oblique downward toward the holding portion,
wherein the first surface is oblique downward toward the communication passage.

3. The casting machine according to claim 2 , further comprising an oblique surface provided between the first surface and the communicating passage, the oblique surface being oblique downward toward the holding portion, and an angle of the oblique surface to the horizontal plane being smaller than that of the bottom surface.

4. The casting machine according to claim 2 , wherein surface roughness of the first surface is larger than that of the bottom surface.

5. The casting machine according to claim 2 , further comprising an opening provided at the furnace body in the downward direction of the first surface and in the upward direction of the communicating passage.

6. The casting machine according to claim 2 , further comprising a separator configured to block an upper part of the material, the separator extending down from a ceiling surface of the melting portion to above the first surface to form a gap between the separator and the first surface.

7. The casting machine according to claim 2 , wherein the furnace body has a division wall dividing between a first space and a second space, the first surface disposed in the first space, the second space being disposed over the holding portion, and the division wall having a penetrating hole communicating between the first space and the second space as the communicating passage, and
the pressurizing unit supplies gas to the second space.

8. The casting machine according to claim 2 , wherein the first heater is a hot plate having a heating surface corresponding to the first surface.

9. The casting machine according to claim 2 , wherein the furnace body has a first passage extending downward and a second passage connected to a lower end of the first passage and extending upward, the first passage corresponding to the holding portion, and
the pressurizing unit pressurizes the top of the molten metal in the first passage to push the top of the molten metal in the second passage up, thereby forcing the molten metal into the die.

10. The casting machine according to claim 9 , further comprising a second heater inserted in the holding portion from a position of the furnace body higher than the top of the molten metal in the first passage.

11. The casting machine according to claim 10 , further comprising a connection member connecting the second passage and the die,
wherein the second heater extends obliquely downward to below the connection member.

12. The casting machine according to claim 11 , wherein the first passage extends obliquely downward to below the connection member; and
the second heater extends along the first passage to below the connection member.

13. The casting machine according to claim 9 , wherein the area of a top surface of the molten metal in the first passage is larger than that of a top surface of the molten metal in the second passage.

14. The casting machine according to claim 9 , further comprising an overflow passage connected to the first passage at a position lower than the lowest position of the communicating passage and an outlet port of the molten metal connected to the die.

15. The casting machine according to claim 1 , wherein the concavities and the convexities are formed along a flow direction of the molten metal which has been melted.

16. The casting machine according to claim 1 , wherein the convexities project upward and the concavities recess downward and are formed between the convexities.

Assignees

• Denso Corp

Inventors

• Yasuda Kazumasa
• Sakakibara Yuji
• UESAKA Naoto
• Yamashita Atsushi

Classifications

• B22D17/28

  Melting pots · CPC title

• B22D17/2015

  Means for forcing the molten metal into the die (for plastics B29C45/46) · CPC title

• B22D41/01 Primary

  Heating means · CPC title

• B22D18/04

  Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould · CPC title