Claims
- 1. A method of injecting molten metal into a cold chamber die casting machine using an injection unit,
- the top filling injection unit consisting of an open upwardly inclined injection sleeve, an injection plunger, an injection plunger-piston rod connecting link, a piston rod, a piston and a hydraulic cylinder,
- the injection plunger being connected by the injection plunger-piston rod connecting link to the piston rod, the piston rod is connected to the piston located in the hydraulic cylinder,
- the injection plunger located within the upwardly inclined injection sleeve having an upper injecting position and a retracted filling position within the open upwardly inclined injection sleeve,
- the upwardly incline injection position being proximate the top of the upwardly inclined injection sleeve,
- the lower retracted filling position of the injection plunger located within the upwardly inclined injection sleeve being adjustable to any desired retracted filling position within the upwardly inclined injection sleeve,
- characterized by selecting a lower retracted filling position of the injection plunger in the upwardly inclined injection sleeve,
- filling the space in the inclined injection sleeve above the injection plunger with molten metal substantially completely, and
- moving the injection plunger upwardly in the injection sleeve to the injection position proximate the top of the injection sleeve forcing the molten metal into the cold chamber die casting machine.
- 2. A top filling injection unit for a cold chamber die casting machine,
- the top filling injection unit consisting of an open upwardly inclined injection sleeve, and injection plunger, and injection plunger-piston rod connecting link, a piston rod, a piston and a hydraulic cylinder,
- the injection plunger being connected by the injection plunger-piston rod connecting link to the piston rod, the piston rod is connected to the piston located in the hydraulic cylinder,
- characterized by the injection plunger located within the upwardly inclined injection sleeve having an upper injecting position and a lower retracted filing position within the open upwardly inclined injection sleeve,
- the upwardly inclined injection position being proximate the top of the upwardly inclined injection sleeve,
- the lower retracted filling position of the injection plunger located within the upwardly inclined injection sleeve being adjustable to any desired retracted filling position within the upwardly inclined injection sleeve.
- 3. The top filling injection unit for a cold chamber die casting machine of claim 2, in which the top of the injection plunger has an upwardly and outwardly extending surface.
- 4. A cold chamber die casting machine having a top filling injection unit, a fixed platen, a moving platen, a fixed die half, a moving die half, and a part line on which the moving die half and the fixed die half meet,
- the fixed die half is mounted on the fixed platen and the moving die half is mounted on the moving platen,
- the top filling injection unit consisting of an open upwardly inclined injection sleeve, an injection plunger, and injection plunger-piston rod connecting link, a piston rod, a piston and a hydraulic cylinder,
- the injection plunger located in the injection sleeve being connected by injection plunger-piston rod connecting link to the piston rod, the piston rod is connected to the piston located in the hydraulic cylinder,
- an aperture defining an upward opening in the fixed die half,
- the injection sleeve located in the aperture defining the upward opening in the fixed platen,
- the injection plunger located within the upwardly inclined injection sleeve having an upper injecting position and a lower retracted filling position within the open upwardly inclined injection sleeve,
- the upwardly inclined injection position being proximate the top of the upwardly inclined injection sleeve,
- the lower retracted filing position of the injection plunger located within the upwardly inclined injection sleeve being adjustable to any desired retracted filling position within the upwardly inclined injection sleeve.
- 5. The cold chamber die casting machine of claim 4 having a fixed die half and an injection unit receiver, the injection unit receiver fastened to the base of the fixed die half, an aperture defining an upwardly inclined passage in the injection unit receiver, the injection sleeve disposed in the aperture defining the upwardly inclined passage in the injection unit receiver.
- 6. The cold chamber die casting machine of claim 4 in which the injection sleeve is disposed between a vertical position and a position 45.degree. from vertical.
- 7. The cold chamber die casting machine of claim 4 in which the nose of the injection plunger inclines forwardly and upwardly.
- 8. The cold chamber die casting machine of claim 6 in which the moving die half has a protruding nose which extends over the part line when the die halves are clamped.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2083082 |
Nov 1992 |
CAX |
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Parent Case Info
This is a continuation of application Ser. No. 08/712,579 filed on Sep. 13, 1996 which is a continuation of application Ser. No. 08/436,200, filed as PCT/CA93/00485, Nov. 17, 1993 published as WO94/11136, May 26, 1994 both now abandoned.
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
3208113 |
Bennett |
Sep 1965 |
|
3672440 |
Miura et al. |
Jun 1972 |
|
4178983 |
Mochizuki et al. |
Dec 1979 |
|
Foreign Referenced Citations (5)
Number |
Date |
Country |
0036687 |
Sep 1981 |
EPX |
57-14456 |
Jan 1982 |
JPX |
58-148066 |
Sep 1983 |
JPX |
64-34555 |
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JPX |
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GBX |
Continuations (2)
|
Number |
Date |
Country |
Parent |
712579 |
Sep 1996 |
|
Parent |
436200 |
May 1995 |
|