JPS5924567A - Injection device for vertical type die casting machine - Google Patents

Abstract

PURPOSE:To eliminate the overheating of molten metal and the need for the heating of a sleeve and to economize energy by inserting a heat insulating cup into the sleeve and forcing the molten metal into dies by means of a plunger. CONSTITUTION:A heat insulating cup is constituted of a back metal 40 consisting of the metal of the same type as molten metal 30, and a heat insulating material 42 of low thermal conductivity coated on the outside or inside of the metal 40. The cup 38 is then inserted into a sleeve 24, and is installed on the top surface of the plunger tip 20 of a plunger 18. If molten metal 30 is charged into the cup 38 and the plunger 18 is moved in an arrow direction, the cup 38 is softened and deformed 44 by the thermal effect of the metal 30 and the metal 30 forced into a cavity 34 through a runner 36 is cooled and solidified. The casting is removed together with a flange 28 and a heat insulating cup 44, and is divided to the flange 28, a product 49 and a remaining part 50. When the part 50 is charged into a melting furnace and is melted, the heat insulating material 54 floats as a melt and is removed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an injection device iK1 blade of a vertical die casting machine.

Conventionally, the injection device tK of a vertical die-casting machine has a sleeve and a plunger of 41q).1.
Since the molten metal is directly injected into the space button 'i', the relatively low temperature sleeve and plunger rapidly remove the heat from the molten metal.
If t' is low, the molten metal will partially solidify and impede the fluidity of the molten metal, so in order to avoid this f'L, excessive heating of the bath water and heating of the sleeve are carried out. Operation: Saving thermal energy, vertical die casting) 4/11/Y
This is not only extremely disadvantageous in extending the life of component parts and improving the quality of the product, but also prohibits practical production using large-sized aluminum die-casting or die-casting of iron-based metals with high melting points. made it possible.

Therefore, the general purpose of the present invention is to suppress the heat dissipation of the Ic-injected iLfcm hot water in the injection device of a vertical die-casting machine, thereby preventing the injection device from dying and extending the life of the mold. Our goal is to improve the quality of our products and expand their range of uses.

In order to achieve the above object, the vertical according to this invention! 11J,
The die casting (injection device) injects metal, i.e., molten metal, into the molten FM! through a sleeve and a plunger.
In a vertical die-casting machine that obtains a product by press-fitting into the Nurieve, a heat-insulating cup made by applying a heat insulating material to the inside or outside of a public metal made of the same type of metal as the molten metal is inserted into the Nurieve, and Jj of the heat-insulating cup is inserted into the Nurieve. : The installation of the part on the top surface of the plunger is referred to as 4':r ridge.

The back metal and ItIr heat material that make up the heat insulating cup need to be heated and softened by the heat of the molten metal, as will be explained later. Correspondingly, it is selected as appropriate from each month of AJa.

That is, for example, the backing metal is appropriately selected from metal materials such as pure aluminum with a melting point of 580 to 600C, pure copper with a melting point of 850 to 900C, or low carbon steel with a melting point of 1200 to 1600C, and has a melting point of about 0.2 to 0. Composed of 5 plate thickness No. 1
1. On the other hand, the heat insulating layer is preferably selected from water glass having a melting point of 790 to 1000C or a silica-based heat resistant agent having a melting point of 1400C, and has a thickness of about 0.3 to -0.6 mm.

Other objects and advantages of the invention will become more apparent from the following description.

Next, a typical configuration example of an injection device for a vertical die-casting machine according to the present invention will be described in detail below with reference to the drawings.
+ Explain.

As shown in FIG. 1, a plunger 18 is connected via a coupling 16 to the piston rod 14 of a hydraulic cylinder 12 fixed to the main body 10f of the vertical die casting machine, and is held on the tip 2Di fixing plate 22 of the plunger 1B. The sleeve 24 is slidably inserted into the sleeve 24.

Length of the sleeve 24: The Ai portion is extended into the fixed mold 26, and the locking flange 28 is detachably attached to the tip of the sleeve 24 to move the molten metal 60. The runner 36 is inserted into the key V bit 64 of the mold 52. When press-fitting through the sleeve, it is inserted into the sleeve 24,
In FIGS. 2 and 6, the heat insulating cup 68 is configured to prevent the heat insulating cup 68 from moving along with the molten metal 60 into the cavity of the movable mold 62. In FIGS. t#7 is formed from a backing metal 40 made of a metal of the same type as Jl, and a heat insulating material 42 with a low thermal conductivity applied to the outside or inside of this backing metal 40. Sunawaji,
No. 1 shown in FIG. In the heat insulating cup 38 shown in FIG.
The heat insulating material 42 is made of a material that is hard at room temperature, such as silica.
In this case, pieces of the heat insulating material 42 may damage the surfaces of the sleeve 24 and the plunger 18 due to the gap between the fitting gap between the sleeve 24 and the plunger 18, so the heat insulating material 42 is applied to the inner surface of the back metal 40. The heat insulating material 42 is prevented from escaping to the outside of the back metal 40.

The heating cup 68 constructed in this way is prepared by heating the back metal 40 to about 150° C., and containing water glass or silica on the outer or inner surface of the heated back metal. The solution is spray coated and then heat treated to remove residual moisture.

Back plate 40 and heat insulating material 42 used for heat insulating cup 68
Since it is necessary to be heated and softened by the heat of the molten metal 30, fL is selected from aJf+ according to the temperature, that is, the melting point, of the molten metal 30 due to the different pressures of the metals constituting the molten metal 60. For example, typical examples are shown below.

Furthermore, the thickness of each of the back plate 40 and the heat insulating plate 42 is
Depending on the size of the product cup 3B, the back money is approximately 0.2~0
In the range of 5 openings, the insulation is also approximately 0.3 to 0.6 mm (axis υ
Selected with I, ll-ru.

Next, we will generally explain the molding operation using the injection device of the vertical die casting machine according to the present invention.
After the molten metal 30 is injected into the heat insulating cup 38, the plunger 18 moves in the direction of the arrow and is fixed to the main body 10, and the molten metal 30 is poured into the cavity 34 by the molds 26 and 62. Press-fit Noah 2. Thereafter, this molten metal 30 is solidified to become a molded body, and a part of it becomes a product.

That is, when the molten metal 60 is press-fitted into the inner cup 68 and the plunger 18 moves in the direction of the arrow as shown in FIG. Since it is made of metal, it is soft and the heat insulating cup 38 is 8R! No.1 indicated by reference numeral 44 in FIG. The heat insulating barrier 42 is also softened by the thermal action of the molten metal 30, and does not become an obstacle when the plunger 18 moves in the direction of the arrow. Pressed into the cavity 34 via the launch 36 under the pressure 1i1+ of the plunger 11.
The molten metal 60 is cooled, solidified, and molded into the fifth molded metal 60.
As shown in the figure, the flange 28 and the heat insulating cup 44 are taken out, and as shown in FIG.
8. Product 48 and remaining part 5 [JK division,, remaining part 5
0 is charged into the melting furnace 11-1 The remaining portion 50 (7) is melted together with the backing metal 54 J17, and the melt is poured into the molten metal in the melting furnace. Also,
Adiabatic melting 54d: Under the action of the solvent introduced into the melting furnace, the molten metal becomes a complete melt and melts (1) on the two sides of the molten metal in the
1. Ru.

As mentioned earlier, the insulation of the 1st crystal cup 38 is 11 in 42 months.
Non-stick with low thermal conductivity! f's water crow +7
Since it is a foam such as molten metal, it has a very high heat insulating effect, so it can completely prevent the temperature of the molten metal 60 from falling below 1/l, making it possible to lower the hot water supply temperature. There is no need to heat the sleeve 24, which not only saves a great deal of thermal energy, but also prevents the molds 26 and 62 in contact with the molten metal filter O from being overheated.
The heat (iii7: Id) received by
The surface of the inner hole has to be machined so that the heat can be transferred.
% J], it is smaller, the softening of the sleeve inner hole surface and the thermal shock are reduced, and the life of the sleeve 24 as well as the molds 26 and 62 can be extended. can.

Sunta, Ho+i! 40t barracks used for iA cup ro 8
i-Can manufacturing technology KJ: 9 Easy to manufacture at low cost.

As mentioned above, since the vertical 1f, IJ, and injection device i of the die-casting machine according to the present invention use the υ+j vortex cup, the heat radiation Ikk from the molten metal is small, the +118 degree distribution of the molten metal is uniform, and the molten metal Since the fluidity of the molten metal becomes uniform, there is no possibility of defects such as partial poor circulation in the product, and there is no need to heat the molten metal to a high temperature, so the molten metal contains 'J'.
j'1. Are there products that generate less gas and have fewer defects?
It is understood that JT and JL.

The injection device of the vertical die-casting machine according to the present invention can be used extremely effectively in special fields such as large-sized aluminum die-casting and die-casting of iron-based alloys with high melting points. Ru.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing the 4'11 configuration of the injection device of the vertical die-casting machine according to the present invention, and Fig. 2 and Fig. 6 are the vertical die-casting machines of the present invention, and Figure 4 is an enlarged view of the injection device c, ', ?H shown in Figure 1 after the molten metal is press-fitted into the mold.
FIG. 5 is a sectional view of a molded body formed into a predetermined shape by solidifying the molten metal, and FIG. 10... Wooden body 12... Hydraulic cylinder 1
4... Piston rod 16... Camp ring 1
8... Plunger 20... Plunger chimbu 2
2... Fixed plate 24... Sleeve 26.
... Fixed mold 28 ... Locking cylinder 30 ... Molten metal 62 ... Moving metal bar V filter 4 ... Cavity 36 ... Run 38 ... Heat insulation cup 40
...Au <+242...Insulation Moon A4
...Main τI, 1 (Cup 46...Product 4B...Made Crystal 50...Remaining
Part 52...Gi; (Gold 54...Insulating material

Claims (1)

[Claims] (1) Molten gold A・4 through sleeve and plunger
In other words, in a vertical die-casting machine that presses molten metal into a mold to obtain a product, a heat-insulating cup made by applying heat-insulating material to the inside or outside of a backing metal made of the same type of metal as the molten metal is placed inside the sleeve. 1. An injection device for a vertical die-casting machine.