サイアロン製アルミ溶湯部品 | 射出成形機用部品他

概要

サイアロンは、高温構造材料として優れた特性を持ったファインセラミックスです。当社では、その特性に着目し、アルミニウムの鋳造時に使用される各種の治工具を製作しています。

Sialon Parts for Handling Molten Aluminum

Thermocouple Protection Tube for Measurement of Aluminum Temperature

Figure 1: Sialon protection tube-single pieces

Standard Size(mm)
Outer Diameter	Inner Diameter	Length
11.5	6.5	500
15	9	800
22	14	1,100
28	16	1,100
32	20	1,100
34	20	1,900

Stalk for Low-Pressure Casting Machines

We offer a line-up of stalks and thermocouple protection tubes, as Sialon parts for lowpressure casting machines.
Also, we are attempting to create a good seal against air leakage by making use of a composite metal and Sialon structure so as to maintain the required die load and prevent breakage.

Sizes available
Outer diameter (mm) : Max 234 dia.
Length (mm) : Max 1,400

Figure 2: Stalk

Immersion Heater Tube for Holding Furnaces

Especially useful for disposition of Na fluxes. Applicable to such heat sources as gas burners and electric heaters.

Sizes available
Outer diameter (mm) : Max 300 dia.
Length (mm) : Max 1,600

Figure 3: Heater tube

Degassing Rotor for Molten Aluminum

Sizes available
Outer diameter (mm) : Max 240 dia
Length (mm) : Max 1,300

Figure 4: Degassing Rotor

Shot Sleeve for High-Pressure Diecasting Machines

(1) Reduce Cold Flakes (“Cold Flakes”) :solidified aluminum defect pieces (scattered structure) formed in shot sleeve: Superior heat-retention. “Possibility of no heating equipment“
(2) Stable shots and longer life (Especially at High temperature ≧ 700℃ or 1290°F): Less deformation, High corrosion resistance, Erosion resistance and Wear resistance. “Possibility of no water cooling channel“
(3) Energy saving: Sialon’s superior heat-retention enables lower molten aluminum casting temperature.

Figure 5: Heat-retention
Figure 6: Shot Sleeve (Cut Model)

Sialon and Super Sialon

Hitachi Metals’ Sialon and Super Sialon are ideal for jigs and tools that come into direct contact with molten aluminum on the aluminum melting and casting line.
Hitachi Metals has developed this heat-resisting, highstrength ceramic material based on its long experience in processing metals, and has used it in molten aluminumhandling parts.

Features of Sialon and Super Sialon Parts for Handling Molten Aluminum

(1) Little or no contamination of molten aluminum.
(2) Little or no corrosion from molten aluminum.
(3) Little or no adherence of molten aluminum.
(4) High strength remaining intact within the temperature range of molten aluminum.
(5) Two different thermal conductivity
Low thermal conductivity : Sialon is for higher heat retention required parts such as Stalk.
High thermal conductivity : Super Sialon is for higher heat transfer required parts such as Heater Tube

Characteristics of Sialon

Materials	Density (g/cm³)	4 point Bending strength (MPa)	Young's modules (GPa)	Thermal shock resistance (ΔT°C)	Coefficient of thermal expansion (×10-6/°C) [20～800°C]	Thermal conductivity (W/m・k)	Maximum allowable temperature (°C)
Sialon	3.2	750～950	290	710	3.0	17	1,250
Super Sialon	3.2	800～1050	300	750～1000	3.0	65	1,250

Sialon and Super Sialon are used primarily for the production of parts that come into contact with molten aluminum.
The characteristics of Sialon are given below in comparison with those of structural ceramics.

Figure 7: High-temperature strength
Figure 8: Thermal shock resistance