JPS62156060A - Injection device for molten metal for die casting machine - Google Patents

Abstract

PURPOSE:To improve the durability of the titled device by forming main constituting members of the device of ceramics, fixing the bottom part of a gooseneck to the inside surface in the bottom of a holding pan and covering the outside peripheral face, etc. of the holding pan with a heat insulating material contg. electrical heating wires. CONSTITUTION:The gooseneck 2 having a cylinder liner 4 is fixed in the holding pan 1 and all of the main constituting members of the injection device B including the pan 1, liner 4, gooseneck and heat insulating material 5, etc. are formed of the ceramics. A collar part 2a at the top end of the gooseneck 2 is supported and fixed by a hermetic cover plate 9 of the pan 1. The molten metal stored in the pan 1 via a feed pipe 10 is injected into a nozzle 7 by the piston effect of a plunger 3. The main constituting parts are formed of the ceramics and the pan 1 is coated with the heat insulating material 5 contg. the electrical heating wires 5a and therefore, the resistance to heat, impact and oscillation is improved. The durability of the device is thus improved.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a molten metal injection device for a hot chamber die casting machine, and more particularly to an injection device for injecting hot molten metal.

(Prior art) Conventionally, the injection device (B”
) has a structure as shown in Fig. 2, and a gooseneck (
33) is attached in a suspended state, and the above-mentioned retainer m1 (31) is held on a heating table (34).

In the injection device (B') having the above configuration, the plunger (35) is moved by the piston in the injection cylinder (36) every time the molten metal is injected. The impact is transmitted to the gooseneck (33) through the nozzle (37), so the gooseneck (33)
If the gooseneck (33) is shot unnecessarily and the number of shots is increased, the support and bottom of the gooseneck (33) will become fatigued and damaged in a relatively short period of time.

Therefore, in order to solve the above-mentioned problems, an injection device (B'') having the configuration shown in FIG. 3 has been manufactured.

The injection device (B") is used to apply the W blow to the gas. Relationship between the molten metal injection device 3 in the machine and the case of the person making the amendment Patent applicant name (name)
Akio Nakano 4, Agent 5, Date of correction order (voluntary correction) Showa year, month, day 6, The plunger (3) to be corrected was moved by the piston in the injection cylinder (6), causing the inside of the cylinder to A mold (8a) formed by passing the guided molten metal through the nozzle (7)
(8b).

A cylinder liner (4) made of ceramic is fitted into the cylinder of the gooseneck (2), and the bottom of the gooseneck (2) is fixed to the bottom inner surface of the heat-insulating steel (1), and the flange (2a) at the top The heat insulating steel (1) is firmly fixed by being supported by being hooked into the inner hole of the lid plate (9) that seals it.

The melting furnace (not shown) is connected to the hot water supply pipe (10) to keep it 414 (
The molten metal stored in the gooseneck (2) flows into the cylinder through the suction port (2b) provided in the peripheral wall of the gooseneck (2), and is pushed through the cylinder liner (2) by the effect of the plunger (3).
4) passes through an injection path (2C) recessed in the peripheral surface of the liner (4), and is injected into a nozzle (7) connected to the upper end opening of the injection path (2C). Note that the material of the plunger (3) needs to be ceramic because the cylinder liner (4) is made of ceramic.

The outer circumferential surface and bottom outer surface of the heat-retaining pot (1) are provided with a heat-retaining layer of m1 (1
) is attached with a heat insulating material (5) for heating the heat insulating material (5) and the heat insulating material (1) is held in an outer container (11) and placed on a support stand (12). It is posted on.

The heat insulating material (5) is made of ceramics and has a heating wire (5a) inside that serves as a heat source, and is made of heat insulating steel (1).
A predetermined portion of the tuning outer circumferential surface is provided exactly along the outer surface of the bottom part so as to reinforce it.

Next, the compositional structure of the ceramics constituting the above-described heat retaining m(1), gooseneck (2), cylinder liner (4), and heat retaining material (5) will be briefly described.

The ceramics we refuse are solid solutions with α-5L3N4 structure, MX (Si, AI) +2 (0,N) 16
(In the above formula, M is 1, Ca, Y, etc., O≦X≦2).
It is an α-sialon-based sintered body consisting of a dense composite (solid solution) structure phase that is sintered and intercalated between N4 columnar crystals (β phase), and is a region where α-sialon and β-5L3N4 coexist. In the composition range called the "partially stabilized" α-sialon region, it has excellent mechanical properties such as strength, hardness, and fracture toughness, as well as excellent thermal shock resistance and chemical resistance. In addition, the mixture of α-Sialon and βSi3N4 contains β-9L 3 to 1% α-Sialon 60vo.
N440vo1%.

The injection device (B) with the above configuration is a gooseneck (2)
While fixing the bottom part of the heat insulating steel (1) to the bottom inner surface of the heat insulating steel (1),
The plunger (
3) etc., the gooseneck (2) vibrates,
There is no excessive load on the gooseneck (2), and the load of hot water pressure and impact applied to the bottom of the gooseneck (2) is absorbed by the heat insulator w4 (1) and the heat insulator (5), so the bottom The risk of damage can be reduced.

Furthermore, since the heat insulating steel (1) is reinforced with a thick ceramic heat insulating material (5), the durability of the insulating Wl (1) can be greatly improved.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of the present invention, and FIGS. 2 and 3 are longitudinal sectional front views showing a conventional injection device installed in a die-casting machine. In the figure, B: injection device, 1: heat-retaining steel, 2: gooseneck,
3. Nijiranjar, 4. Nijilinda liner, 5: Insulating material, 5a: Heating wire Patent applicant Akio Nakano Figure 3 Figure 2 Procedural amendment January 26, 1985 1. Indication of the case Patent application filed in 1985 No. 270483 2, Name of the invention: Injection device for molten metal in a die-casting machine 3, Relationship with the case of the person making the amendment Patent Applicant Name (Name)
Akio Nakano 4, Agent 5, Date of amendment order (voluntary amendment) Showa, Month, Day 6, Subject of amendment (1) The scope of claims in the description is amended as shown in the attached sheet. (2) Correct "Ceramics...Wetting agent" in the 11th and 12th lines of page 5 of Light m to "Insulating material j made of ceramics." (3) “Inner hole” on page 7, line 11 of the specification is “inside the hole”
Correct to. (4) Correct the inlet (2b) J in page 7, line 15 of the specification to [inlet (2b) J opened across the circumferential wall to the circumferential wall of the cylinder liner (4). . (5) "Effect" on page 7, line 16 of the specification is corrected to "piston motion." (6) [Thus...] from page 8, line 18 to page 9, line 11 of the specification. ' shall be corrected as follows. The described ceramic is a solid solution with α-5L3N4 structure, Mx (Si, AI> 12 (0, N) +
6 (In the above formula, M is one, α-sialon granules (α phase) represented by Ca, Y, etc. 60vo1% is β'i3
It is an α-sialon sintered body consisting of a dense composite (solid solution) structure phase that is sintered and intercalated with N4 columnar crystals (β phase) 40vo1%, and α-sialon granular crystals 60v.
Strength in the composition range called the "partially stabilized" α-SiAlON region, where 1% O and β-(3N4 40VO 1%) coexist. It has excellent mechanical properties such as hardness and fracture toughness, and has high heat resistance.
YJ impact resistance, 1IJ4 chemical resistance (9 machines).

Claims (1)

[Claims] A heat insulating pot for storing molten metal is made of ceramics, and a gooseneck made of ceramic is provided inside the heat insulating pot,
A plunger that is moved by a piston by an injection cylinder is fitted into the cylinder of this gooseneck, and a cylinder liner made of ceramics is fitted into the cylinder of the gooseneck, and the bottom of the gooseneck is attached to the inner surface of the bottom of the heat-insulating pot. A device for injecting molten metal in a die-casting machine, which is attached with a ceramic heat insulating material that is fixed and has heating wires inside the bottom outer surface and outer peripheral surface of the heat insulating pot.