JPH04134252U - Plunger tip for aluminum die casting - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a plunger tip for aluminum die casting that does not easily damage the sleeve, reduces the time required for one shot, requires only a small amount of lubricant, and can be used for a long period of time. This is what I am trying to do. [Structure] A plunger tip 1 for aluminum die casting that forms molten aluminum alloy into a desired shape by pressure, and this plunger tip is made of beryllium alloy that is approximately cylindrical and consists of equiaxed crystals. be.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is an aluminum alloy that can be used to form molten aluminum alloy into a desired shape by applying pressure. This relates to a plunger tip for die casting.

0002

[Conventional technology]

Conventionally, aluminum dies were used to form molten aluminum alloy into a desired shape by applying pressure. The cast plunger tip is usually made of the same iron alloy as the sleeve. Ta.

0003

[Problem that the idea aims to solve]

By the way, the iron alloy made of the same material as the sleeve mentioned above is used as plastic for aluminum die casting. If used on a plunger tip, the sleeve and plunger tip may be easily damaged. It also wears quickly, requires a lot of work time due to poor heat conduction, and has poor lubrication. There was a problem in that a large amount of lubricating oil was required.

0004 Therefore, the material of the plunger tip is softer and has better thermal conductivity than the material of the sleeve. It is conceivable to use beryllium alloy, which has self-lubricating properties. However, the program When configuring the plunger tip with beryllium alloy, the rolled rod-shaped beryllium alloy When cut and formed, the surface of the rolled bar-shaped beryllium alloy forms a layered structure. Because of this, the surrounding surface may curl or crack during use of the plunger tip. There is a problem that it cannot withstand long-term use.

[0005] This invention was made in view of the above problems, and its purpose is to However, it is difficult to damage the sleeve, the time required for one shot is shortened, and a small amount of Plunger tip for aluminum die casting that requires no lubricating oil and can be used for a long time. The aim is to provide a

[0006]

[Means to solve the problem]

In order to achieve the above purpose, the plunger for aluminum die casting in this invention The chip is characterized by being approximately cylindrical and made of beryllium alloy consisting of equiaxed crystals. It is a sign, a thing.

[0007]

[Effect]

Since it is a plunger tip for aluminum die casting configured as above, The plunger tip is softer than the sleeve and may damage the sleeve. The plunger tip has good heat conduction, which reduces work time. Since it is self-lubricating, only a small amount of lubricating oil is required. In addition, the plunger tip is an equiaxed crystal. , so the surrounding surface is less likely to curl up or crack during use. do not have.

[0008]

【Example】

An embodiment of this invention will be described with reference to FIGS. 1 and 2. In Fig. 1, 1 is approximately cylindrical and composed of beryllium alloy consisting of equiaxed crystals. The plunger tip 1 is reciprocated via a rod 2. and a moving device (not shown).

[0009] 3 is a cylindrical sleeve made of iron alloy with a mold 4 fixed to one end; The plunger tip 1 is reciprocatably arranged inside the mold 4. A supply port 5 for supplying molten aluminum alloy is bored nearby. Also, The mold 4 has a runner 6 for molten aluminum alloy and a cavity 7 for molding. The mold 4 consists of two divided molds. Furthermore, it consists of the two divided types. The mold 4 is held by clamping members 8 and 9 provided in the die-casting machine. It is now possible to

0010 A plunger constructed of the above-mentioned beryllium alloy having a substantially cylindrical shape and consisting of equiaxed crystals. To fabricate the chip 1, it is preferable to use something like the one shown in FIG. That is, stand 11 A cylinder 12 is fixed on top, and molten berry is poured into the cylinder 12 from the supply port 13. to supply Ryum alloy. 14 is the melted Beryl in the cylinder 12; This piston is used to pressurize the aluminum alloy.

[0011] Therefore, the molten beryllium alloy is supplied from the supply port 13 into the cylinder 12 and By pressurizing the beryllium alloy with the piston 14, it becomes approximately cylindrical and equiaxed. A rod-shaped body is formed. This is machined into the desired plunger tip 1. It is best to mold it.

0012 Aluminum die casting is made using a plunger chip with the above configuration. To shape the aluminum alloy, feed the required molten aluminum alloy from the supply port 5, and press it with the rod 2. Move the plunger chip 1 toward the mold 4 side. This movement will cause the sleeve to The molten aluminum alloy in 3 is forced into the cavity 7 from the runner 6 and fills the cavity 7. So After that, the plunger tip 1 is separated from the mold 4 side. Molten aluminum in mold 4 Once the alloy has solidified and cooled, the aluminum die-cast molded product is removed from the mold 4.

[0013]

[Effect of the idea]

The plunger tip for aluminum die casting according to the present invention is made of equiaxed crystals. The plunger tip is made of aluminum alloy, so the plunger tip is more durable than the sleeve. Since it is soft, it will not damage the sleeve and can be used for a long time. Becomes Noh.

[0014] It also improves the thermal conductivity of the plunger tip, making it easier to use for die-casting. The plunger tip is self-lubricating, which reduces work time and provides self-lubricating properties to the plunger tip. Therefore, only a small amount of lubricating oil is consumed, which can significantly reduce manufacturing costs.

[0015] Furthermore, since the plunger tip is made of equiaxed crystals, the surrounding surface may be damaged during use. It is less likely to turn over or crack, and the plunger tip will not break down. It is small and can withstand long-term use.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of an embodiment of an aluminum die-casting apparatus using a plunger tip according to the present invention.

FIG. 2 is a sectional view of an embodiment of an apparatus for forming a plunger tip according to the present invention;

[Explanation of symbols]

1 plunger tip 3 Sleeve 4 Molding mold

Claims (1)

[Scope of utility model registration request] 1. A plunger tip for aluminum die-casting that forms molten aluminum alloy into a desired shape by pressure, characterized in that the plunger tip is made of beryllium alloy having a substantially cylindrical shape and consisting of equiaxed crystals. Plunger tip for aluminum die casting.