JPS63290672A - Die casting machine - Google Patents

Abstract

PURPOSE:To enable production of composite material by forming each of a forming die, injection sleeve, piston and storing vessel with ceramic material and connecting a mixing furnace supplying molten alloy metal containing mixture with the storing vessel. CONSTITUTION:Body parts 101, 201 in both male and female dies a1, a2 are formed with heat resistant metal and ceramic-made inserting cores 102, 202 are set in insert core setting parts 2, 3 in inner part thereof. Further, the injection sleeve B and the piston C are formed both with the ceramic material. The storing vessel D, which the temp. is held with a heating wire 11, and the covering material 13 are arranged to the sleeve B and connected with the ceramic-made mixing furnace E through a molten metal supplying pipe 14. By this method, the molten alloy metal containing mixture 1 of powdery or fibrous carbide, nitride, etc., can be injected into the forming die while holding the fixed temp. Therefore, the composite material containing the mixture 1 can be produced.

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to a die casting machine.

<Conventional technology> Conventionally, the molds used in die-casting machines are metal molds in which both the male and female molds are made of heat-resistant metal steel as the main mold material, so the overall thermal conductivity is high. It is difficult to control mold temperature distribution, and similarly, the injection sleeve and the piston that is inserted into the sleeve so as to be able to slide back and forth are mainly made of heat-resistant metal steel, etc., so it is difficult to control the mold temperature distribution. Similarly, solidified pieces inside the sleeve have high thermal conductivity.

It was not possible to expect a sufficient heat retention effect without forming a film or the like.

Therefore, in conventional die-casting machines, it is difficult to cast high-precision composite materials by mixing powdered or fibrous metals, oxides, carbides, etc. into molten alloy. It was technically impossible.

<Problems to be solved by the invention> The problems to be solved by the present invention are as follows:
The present invention provides a die-casting machine capable of casting a mixture of string-like metals, oxides, carbides, nitrides, etc. in a molten alloy.

<Means for solving the problems> The technical means taken by the present invention to solve the above problems is to form a pair of molds made of ceramics and connect them to the sprues of the molds. The injection sleeve that is held horizontally and the piston that is slidably inserted into the sleeve are made of ceramic, and the hot water supply port bored in the injection sleeve is made of ceramic and has a lid made of ceramic. A storage container that can be sealed with the body is provided, and a ceramic heat insulating material with heating wires inside is attached to the outer surface of the storage container and the outer peripheral surface of the injection sleeve, and a hot water supply pipe is attached to the storage container. Through powder or iM navy blue metals, oxides, carbides, nitrides, borides,
Silicides, halides.

A mixing furnace was connected and installed to supply molten alloy containing a mixture of sulfides and other substances.

The above ceramic is a solid solution with an α-Si3N4 structure, and contains α-sialon granular crystals 60vo 1% represented by Mx (SL, M) +2 (○, N) + s (in the above formula, M is Mg, Ca, Y, etc.). β-3L3N<columnar crystal 4
These are hot-pressed α-sialon ceramics or pressureless sintered α-sialon ceramics, which are composed of a dense composite structure called a partially stabilized α-sialon region in which 0vo and 1% coexist.

According to the above configuration, powdered or fibrous metals, oxides, carbides, nitrides, borides, silicides, halides, sulfides, etc. are added to the molten alloy melted in the mixing furnace. At the same time, the molten alloy containing the mixture is supplied from the same mixing furnace to a ceramic storage container through a water supply pipe.

Even if the molten alloy supplied and stored in the storage container loses heat to the mixture, it is kept at a constant temperature by the heat retention properties of the storage container and the heat insulating material attached to the outside of the container. Then, the hot water flows into the ceramic injection sleeve from the inlet. The inside of the injection sleeve is always kept at a constant temperature by its heat retention properties and the heat insulating material attached to the outer circumferential surface, and the molten alloy flowing into the storage container is kept at a constant temperature, improving the fluidity (dispersibility) of the mixture. ). Then, the molten alloy flows into the injection sleeve and is simultaneously injected into the cavity of the mold using a ceramic piston, where the mixture is cooled and solidified while being uniformly dispersed within the cavity.

<Example> An example of the present invention will be described based on the drawings.
> is a mold consisting of a male mold (al) and a female mold (a2), (B) is an injection sleeve, (C) is a piston, (D) is a storage container, (E) is a mixing furnace, Said yakuryo type (a+
) After the mold clamping of (a2), the storage container (
D) Powdered or fibrous metals and oxides supplied and stored within.

carbides, nitrides, borides, silicides, halides,
The alloy melt W (M) mixed with the mixture (1) of sulfides, etc. is caused to flow into the injection sleeve (B), and is injected into the cavity <a> by the piston (C).

The yakuryo type (a+) (a2) has its main body (commonly called the main type) (101) and (201) made of heat-resistant metal steel, and the insert installation parts (2) and (3) are recessed. , Inserts (
102) and (202) are fitted and installed respectively to form a nesting type mold structure, and heating i-structures (4) and (5) and cooling mechanisms (4'' and 5) are installed inside the main body parts (101) and (201> ′) respectively.

Then, attach the male type (al) to the movable platen (F), and attach the old type (a2) to the fixed platen (G), and both types (a+
) (a2) face each other.

Also, from the insert (202) of the female mold (a2) to the main body (20
1), and a ceramic cylinder (6
) is inserted into the runner (a) leading to the cavity (a).
7) A sprue (7a) is formed, and the tip end of the injection sleeve (B) is connected to the sprue (7a).

The injection sleeve (B) is made of ceramics, and has a tip end connected to the sprue (7a) and a fixed '1' (
The piston (C) is held horizontally on the side of the injection cylinder (H), and the piston (C) is inserted so as to be movable therein, and the piston (C) is connected to the injection cylinder (H).

This piston (C) is made of ceramic and formed into a rod shape of a desired length.

Then, a ceramic heat insulating material (9) that extends over the entire outer peripheral surface of the injection sleeve (8) and has a heating wire (8) embedded therein as a heat source is attached, and the injection sleeve (B) is attached.
The molten alloy (M) flowing in is kept at a constant temperature by keeping it at a constant temperature at all times.
In addition to improving the fluidity (dispersibility) of the mixture (1) to be mixed with M), the hot water supply port (
10) A storage container (D) is installed on top so as to fit and communicate with the hot water supply port (10).

The storage container <D) is made of ceramics, and has a heat insulating material (12) integrally embedded with a heating wire (11) serving as a heat source attached to the outer surface of the storage container to store the supplied and stored alloy. The opening of the container (D) is designed so that the molten metal (M) can be kept at a constant temperature without reducing the fluidity of the mixture (1) even if heat is taken away by the mixture (1). The lid body (13) made of ceramic can be freely sealed, and is designed to prevent oxidation of the molten alloy (M) and keep it moisturized. In addition, oxidation of the molten alloy W (M) is more reliably prevented by filling the space between the surface of the molten alloy (M) stored in the storage container (D) and the lid (13) with argon or nitrogen gas. You may do so.

A hot water pipe (14) connected to the mixing furnace (E) is connected to the lid (13) in a penetrating manner, and the molten alloy (M) mixed with the mixture (1) from the mixing furnace (E) ) is regularly replenished.

The mixing furnace (E) is made of ceramics and can be kept warm or heated by a burner (14) or the like.

Next, the hermaphrodite type (a+ > (a2) nesting (1
02) (202), injection sleeve (B), piston (
C), storage container (D), lid (13), heat insulating material <9)
(12) Explain the compositional structure of the ceramics that make them.

Such ceramics are solid solutions with an α-Si3N4 structure, and are composed of α-sialon granular crystals (α phase) 60vol% and β-Si3N
4-phase crystal (β phase) Hot-pressed α-sialon ceramics or pressureless sintered α-sialon ceramics consisting of a dense composite (solid solution) structure phase sintered to 40 vol% and infiltrated into a solid solution. , α-sialon granules 6
In the composition range where 0vo 1% and β-Si3N4 columnar crystals 40vol% coexist, which is called ``partial stabilization'' and α-sialon extinction, it has excellent mechanical properties such as strength, height, and fracture toughness, and is heat resistant. !!It has excellent impact resistance and chemical weather resistance.

Also, materials for blending the molten alloy (M) and powdered or fibrous metals, oxides, carbides, nitrides, borides, and silicides to be mixed into the molten alloy (M).

Mixtures of halides, RA compounds, etc. (1) Examples thereof will be briefly explained below.

The blended materials for the molten alloy (M) are not particularly limited, but preferably superplastic metals such as 0 to 99 wt% Ir, 0 to 20 wt% Zr, O
~20 wt% [i.

0-99. swt%Ni, o ~90wt%Cr,
O~15vIt%S.

o~15wt%p, O~30wt%Hn, O~35
wt%Si.

0~60wt% (:,, O~50wt%No,
O~99wt%Al.

0~10wt%N, 0~20I#t%W, 0~60wt
%Co.

0~99wt%Cu, O~99wt%Ti, O~
30wt%Nb.

0~60w1%Ta, O~sowt%V, O~20
wt%B.

O~30vt%Y2O3, 0~10wt%Rh, 0
~20wt%Ra, 0~99wt%-, O~20w
t% Pu, O~99wt% Fe.

0~95wt%Au, O~95wt%~, O~20
wt%Ge.

0~20wt%Cd, 0~30wt%Y, O~20
wt% Yb.

0-20wt%, 0-20wt%Ca, O-99
wt%ZT+.

0~30wt%Sr, 0~20wt%Bi, O
~20wt%F.

0~30wt%Te, 0~20wt%Th, O
~99wt% yen.

0-15wt%Pd, O-10wt%Ba, 0
~20wt%Be.

Compound alloys consisting of 0 to 20 wt% ■1, etc. Arborides include Al103, Zr0z, )boo carbides include SiC, Wc, and Tic, and nitrides include borides such as 3i3 N4, ^IN, and TiN. Examples of silicide include Zr32, Ti32, HoSi2. Examples of halides such as Cr3si include Car2, +4(IFz, CaC
1z.

Examples of sulfides such as BaClz and KBr include Fe5z, ZnS, and CdS.

Therefore, in this embodiment, the molten alloy (M) mixed with the mixture (1) is kept at a constant temperature in the mixing furnace (E).
) is once supplied and stored in the storage container (D) through the hot water pipe (14), and the heat retention of the storage container (D) and the heat insulating material (12
), even if heat is removed to the mixture (1) by
) is maintained at a constant temperature without reducing its fluidity (dispersibility).

After the molds of the two-separated type (at) (al) are closed, the piston (C) is moved to its retreating limit by the operation of the injection cylinder (H) and the hot water supply port (10) is opened. The alloy layer 1 (M) in the container (D) flows into the injection sleeve (B) together with the mixture (1).

The alloy layer W (M), which is supplied with the mixture (1) into the injection sleeve (B), is always kept at a constant temperature by the heat retention properties of the injection sleeve (B) and the heat insulating material (9).
The mixture (1) and the mixture (1) are injected and filled into the cavity (a) by the forward sliding movement of the piston (C). At this time, the molten alloy (M) is heated due to the heat retention properties of the male and female molds (at) (az) and the heating mechanism (4) provided in the male and female molds (al) and (al).
(5) The mixture (1) is injected and filled in a uniformly dispersed state into the cavity (a), which is controlled to have an appropriate mold temperature distribution by the cooling mechanism (4') (5'), and then cooled. The temperature is lowered and solidified by the dimples (4') and (5'), producing a highly precise composite material.

<Effects of the Invention> Since the die casting machine of the present invention is configured as described above, it has the following effects.

■A pair of male and female molds are made of ceramic, and an injection sleeve that is connected to the sprue of this mold and held horizontally, and a piston that is slidably inserted into this sleeve are made of ceramic. At the same time, a storage container made of ceramics and capable of being sealed with a ceramic lid is provided at the hot water supply port bored in the injection sleeve, and on the outer surface of the storage container and the outer peripheral surface of the injection sleeve, A ceramic heat insulating material with internal heating wires is attached, and a mixing furnace is connected to the storage container to supply the molten alloy mixed with the mixture through the water supply pipe, so the molten alloy mixed with the mixture is installed. It can be injected from the storage container into the mold cavity while keeping the temperature at a constant humidity. Therefore, powdered or fibrous metals, oxides, and carbides.

We have developed a die-casting machine that is capable of casting mixtures such as alloys using molten alloys, which makes it possible to manufacture composite materials with high precision that cannot be cast using conventional die-casting machines. I was able to provide it.

■A storage container is provided at the hot water supply port of the injection sleeve, and a mixing furnace is connected to the storage container to supply the molten alloy together with the mixture through a water pipe, so that the molten alloy in the storage container is transferred to each shot of the casting machine. Therefore, hot water can be supplied into the injection sleeve. Therefore, although it is a horizontal injection type die casting machine, it is possible to increase the number of shots per hour, so productivity can be significantly increased.

Therefore, the intended purpose can be achieved.

[Brief explanation of drawings]

The drawing is a front view of a pseudo-stone showing an embodiment of the die-casting machine of the present invention. In addition, (A) in the figure: Molding mold (at): Male mold (az)
: t+i type (B): Injection sleeve (C): Piston (D): Storage container (E): Mixing furnace (1)
: Mixture (7a) : Sprue (8) (11
) : Heating wire (9) (12) : Heat insulation material
(13): Lid Body (14): Hot water pipe

Claims (2)

[Claims] (1) A pair of male and female molds are formed of ceramics, an injection sleeve is connected to the sprue of the mold and held horizontally, and a piston is fitted into the sleeve so as to be able to slide freely. is formed of ceramics, and a storage container made of ceramics and can be sealed with a ceramic lid is provided at the hot water supply port bored in the injection sleeve, and the outer surface of the storage container and the outer periphery of the injection sleeve are A ceramic heat insulating material with heating wires is attached to the surface, and powdered or fibrous metals, oxides, carbides, nitrides, borides, etc. are added to the storage container through a hot water pipe.
A die-casting machine characterized by being connected and installed with a mixing furnace that supplies a molten alloy containing a mixture of silicides, halides, sulfides, etc. (2) The above ceramic is a solid solution with α-Si_3N_4 structure, M×(Si, Al)_1_2(O, N)_
1_6 (in the above formula, M is Mg, Ca, Y, etc.) α-sialon granular crystals 60 vol% and β-Si_3N
_4 Hot pressed α-sialon ceramics or pressureless sintered α-sialon ceramics consisting of a dense composite structure phase called “partially stabilized” α-sialon region where 40 vol% of columnar crystals coexist. A die-casting machine according to claim 1.