Proven Basic Model for Small Parts
Diecast Melting Furnace

DMF

High efﬁciency aluminum melting
and holding furnace for a melting capacityof 400 kg/h or less

The 8thNew JSPMI Prize
Minister's prize
from the METITa b l e o f s p e c i ﬁ c a t i o ns
ModelIntelligent Melting Furnace

IMF

High efﬁciency aluminum melting
and holding furnace
for a melting capacityof 500 kg/h or more

DMF-200S

Melting method

DMF-380

IMF-600

IMF-1000

Individual melting / Tower system

Melting capacity（kg/H）

200

380

600

1,000

Holding capacity （kg）280

500

1,500

2,500

Width（mm）

2,500

3,100

4,000

5,000

External
Depth（mm）
dimensions

2,000

2,400

3,000

3,150

Loadinggate
size
Ladlinggate
size

Higher Melting Capacity for Large Parts Utilizing our Accumulated Technology

DMF-200

Burnercapacity

Height（mm）

1,665

1,710

1,800

2,400

3,300

Width（mm）

300

400

500

600

750

Depth（mm）

200

300

300

350

400

Width（mm）

380

400

450

500

Depth（mm）

420

550

650

800

Depth（mm）

180

200

330

430（kw）

116

116

233

349

Melting（kcal/h）

100,000

100,000

200,000

300,000(quantity)1222（kw）

35

35

35

58

Dross（kcal/h）

30,00030,00030,00050,000(quantity)1111（kw）

5858116

174

Holding（kcal/h）

50,00050,000100,000

150,000(quantity)

1111Control unit / Function

DiecastAluminum Meltingand Holding Furnaces

DMF IMF®

Diecast Melting Furnace®

Intelligent Melting Furnace

Melt as much as needed

Smart Furnace / Flow control, exhaust control, synchronized control of peripherals

MIYAMOTO KOGYOSHOISO 9001 accredited

ISO 14001 accreditedwww.miyamoto-k.co.jp/

High performance while saving energy and space

Headquarters

Tokyo Head Oﬃce

Okuda-shin-machi 12-3, Toyama City, Toyama Prefecture Zip 930-8512
TEL.076-441-2201 FAX.076-441-6645
E-mail kouro@miyamoto-k.co.jp

PMO Hatchobori 8F, Hatchobori 3-chome 22-13, Chuo-Ku, Tokyo Zip 104-0032
TEL.03-3553-2811 FAX.03-3553-2814
E-mail tokyo-k@miyamoto-k.co.jp

Osaka Branch Oﬃce, Sapporo Branch Oﬃce, Tohoku Branch Oﬃce, Nagoya Branch Oﬃce,
Hiroshima Branch Oﬃce, Shikoku Branch Oﬃce, Kyushu Branch Oﬃce, Kurobe Factory

July 2020

Pursuing Thermal Technology and a Green FutureDMF®

Diecast Melting Furnace

IMF®

Combustion under Flow Control

melting and holding furnaces for aluminum die casting, which can overcome those challenges
in aluminum production sites.

Highefficiency

Heat loss →Control valve

which have been managed by skilled workers on site.

Flow meter

Airl
Tota

heatsseat loH

fromlossneychimAir ratio 1.0
1.02 Less 1.1
Black smoke occurs CO increases rapidly pollution NOx and SOx increase

Burner Optimum
combustion

Ultra low oxygen combustion area

Flow meter Control valve

Air lacking area

Low oxygen combustion area

Excess air area

the fuel. In addition, the double cross limit control function
stabilizes the air ratio (1.05 to 1.1) even if the combustion
output fluctuates, improving thermal efficiency andsuppressing oxidation of materials.

Combustion is under flow control so that the burner canoperate in the optimum combustion area. The amount ofcombustible air and fuel flow rate are measured to control
the air ratio according to the theoretical air needed to burnEnvironment
improvement

nmbustioin thermal efﬁciency or molten aluminum quality as well as working environment,

plete coo incom

Flow rate calculation

Optimumcombustion
areathermal efficiency →tss dueFlow rate calculation

Fuel

Other Features

Air and thermal efficiency

Double cross limit controlSensor

Most of conventional aluminum melting and holding furnaces have challenges

The DMF and IMF furnaces offered by MIYAMOTO KOGYOSHO are revolutionary aluminum

Intelligent Melting Furnace

Heat loSolutions for Challenges in Aluminum Production Sites!
High efficiency individual aluminum melting
and holding furnaces in pursuit of thermal efficiency,
molten aluminum quality,
and working environment improvement

Material loading gate

Melting shelf

Dross trap

Thanks to air sealing mechanism,
there is no need to attach a door.
Casting and loading cycles can beshortened. At the same time, there no
exhaust gas blowing from the materialloading gate, which improves theworking environment.

Materials are melted on the melting
shelf in the melting chamber. Burner
flames are effectively directed to thematerials to achieve high melting
efficiency and prevent insufficientmelting of materials.

A dross trap in the form of multi-level slopes isprovided. Molten aluminum is separated from drossand only clean molten aluminum is transferred tothe holding chamber. Ultra-low-cement refractory
castables are formed for the lining, ensuring
durability, wettability and ease of cleaning.

Combustion system with flow control

Holding chamber

Ladling gate

Combustion devices for flow control and safety
are arranged compactly around the burner.
This combustion system ensures optimum
combustion in consideration of not only thermal
efficiency but also environment and safety.

The holding chamber has a structure thatensures an excellent temperature distribution
and heat transfer to molten aluminum, andhas the lining of ultra-low-cement refractory
castables, like the melting chamber, in orderto ensure high molten aluminum quality.

A molten aluminum level sensor is provided
at the ladling gate to keep the level constant(melting feedback control). Since themolten aluminum level rarely fluctuates, lessoxide is attached to the lading gate so thatclean molten aluminum can be supplied.

* Air ratio can be set as required.

Melting Feedback Control

Melting feedback control is employed to stabilize material
preheating, and melt and hold as much material as needed. A
material level sensor is attached to the tower system to control thefilling amount of material, and a molten aluminum level sensor isattached to the ladling gate to control the output of the melting
burner.

Melting combustion
outputHolding combustion
outputMeltingburnerHoldingburner

Ambient temperature control

Material level sensor

Molten aluminum level control

Material level control

Molten aluminum
temperature control

Atmosphere Molten aluminum Molten aluminum
thermocouple level sensor
thermocouple

Heat receiving improved
Preheating improved

Lower temperature[ Advantages of this system ]●By keeping the filling amount constant, the material preheating
is stabilized, improving the thermal efficiency.
●Changes in the molten aluminum level are detected so as tomelt only the consumed amount to avoid wasteful heating.
●Since the molten aluminum level is kept constant, the heattransfer area in the holding chamber and ladling gate ismaximized, which improves the heat transfer efficiency andmelting temperature accuracy (melting temperature accuracy ±5°C). Furthermore, when the heat transfer efficiency isimproved, the ambient temperature in the holding chamber canbe reduced, which suppresses oxide generation due to hightemperature.

Smart Furnace

Air Sealing Mechanism
Energy-saving

Space-saving

installed near the material loading gate of the tower system to achieve air sealingat the loading gate. In addition, an exhaust fan is provided to control air suction
according to the combustion amount and furnace operating conditions.

Exhaust device
Tower section
Melting compartment[ Advantages of this system ]●Having door at the loading gate is unneccessary because there is no exhaustgas blowing from the loading gate, which improves the working environment.
●When cleaning inside the furnace, the work load can be reduced since there
is no hot air blowing from the opening during the cleaning.
●Since exhaust gas is forcibly sucked, the gas can flow through materials even
if the filling amount is large so that a high preheating effect can be obtained.

⬆

Air sealing

Melting burner

The DMF and IMF furnaces can melt hot-return and new materials as muchas needed according to the casting cycle of the die casting machine. Precise
thermal control helps to achieve safe and clean working environment andsupply high quality molten aluminum.

Conventional control of industrial furnaces●Conventionally high accuracy furnace control is achieved byusing an expensive distributed control system (DCS), and only
a limited number of engineers can operate such a system.

ensure a clean working environment. An air curtain fan and exhaust gas exit are

Air curtain fan

Waste reduction in synchronization with die casting machine

Total control system for industrial furnace

Air sealing mechanism is equipped to improve the thermal efficiency as well as toExhaust fan®

Thinking Furnace / Automatic Furnace

Smart Furnace●Smart Furnace utilizes general-purpose control devices
and offers the capabilities equal to DCS at a low cost.

Features of Smart Furnace

1 Simple operation on touch panel screen
2 Automatic recording of furnace operation results
3 All settings on one single system
4 Advanced control at will