Hot Chamber Die Casting Machine

Hot chamber die casting machines Manufacturer - KYLT

Hot chamber die casting machine is a metal rapid prototyping method. It is widely used for low melting point alloys. Such as: zinc/zamak, lead,tin and other alloys.

As it always be used to produce zinc alloy die casting parts, the machine also named: zinc die casting machine, zinc injection machine.

And, compare with cold chamber die casting machine, this machine is small. Its key function is injection work, so it also called: small die casting machine, small zinc injection machine, small high pressure inject machine.

Hot chamber machine injection mechanism is immersed in melting pot. The melting furnace pot attached with die casting machine by gooseneck. The injection cylinder plunger push molten metal alloy through goose-neck structure to machine mould cavities. When mold open, we can got the finished die casting parts. One hot chamber die casting process is finished.

Horizontal and Vertical types Die Casting Machine:

1. Horizontal Hot Chamber Die Casting Machine:

Tonnage:12T, 15T, 18T, 20T, 25T, 30T

This type is full automatically, used to produce: clothes accessories, zipper puller and slider, jewelry, electric parts, lead acid battery PB parts etc.

Horizontal Hot Chamber Die Casting Machine Specifications and Parameters:

ITEMS & TYPE	Horizontal Hot Chamber Die Casting Machine Parameters
	12T	18T	20T	25T	30T
Locking Force	120Kn	180Kn	200Kn	250Kn	350Kn
Tie Bars Inner Space	190×220mm	215×225mm	235×245mm	235×245mm	280×320mm
Moving Platen Stroke	120mm	125mm	125mm	125mm	170mm
Profiling Thickness	110 – 190mm	110 – 190mm	110 – 190mm	110 – 190mm	150 – 250mm
Injection Pressure	14Kn	20Kn	20Kn	20Kn	45Kn
Injection Stroke	55mm	72mm	72mm	72mm	95mm
Dosage of Fluid Metal Per Shot	Zn:100g	Zn:180g	Zn:220g Pb:500g	Zn:220g Pb:500g	Zn:800g
Crucible Effective Capacity	Zn.70Kg	Zn.:110Kg	Zn.110Kg Pb.130-150Kg	Zn.110Kg Pb.130-150Kg	Zn.160Kg
Motor Power	4Kw	5.5Kw	5.5Kw	5.5Kw	7.5Kw
Accumulator Capacity	6.3L	10L	16L	16L
Working Pressure	6.2Mpa	7.0Mpa	7.0Mpa	7.0Mpa	9.0Mpa
Electric Heating Tube Power	6.9Kw	6.9Kw	6.9Kw	6.9Kw	15Kw
Heater Power	1Kw	1Kw	1Kw	1Kw
Oil Tank Capacity	170L	170L	170L	170L	180L
Machine Weight	~ 1100Kg	~1450Kg	~ 1450Kg	~ 1450Kg	~ 2600Kg
Machine Size	220×80×180cm	250×90×180cm	250×90×180cm	250×90×180cm	265×120×170cm
Vane Pump	28L/min	28L/min	28L/min	28L/min

2.  Vertical Hot Chamber Die casting Machine:

Tonnage:12T, 20T, 25T, 30T

This type is semi-auto, used to produce casting parts with insert. It is convenient to set insert parts in mould cavities. Use to produce Fishing sinker, Luya Bait, Fishing Bait, brake wire zinc end etc.

Vertical Hot Chamber Die Casting Machine Specifications and Parameters:

ITEMS & TYPE	Vertical Hot Chamber Die Casting Machine Parameters
	12T	20T	30T
Locking Force	120Kn	200Kn	300KN
Tie Bars Inner Space	190×220mm	235×245mm	345×295mm
Moving Platen Stroke	120mm	125mm	125mm
Profiling Thickness	110 – 190mm	110 – 190mm	110 – 190mm
Injection Pressure	14Kn	20Kn	30Kn
Injection Stroke	55mm	72mm	120mm
Dosage of Fluid Metal Per Shot	Zn:100g	Zn:220g Pb:500g	Pb:1000g
Crucible Effective Capacity	Zn.70Kg	Zn:110kg Pb:130-150Kg	Pb:300Kg
Motor Power	3.75Kw	3.75Kw	5.5KW
Accumulator Capacity	6.3L	16L	16L
Working Pressure	8Mpa	7.0Mpa	7.0Mpa
Electric Heating Tube Power	7.5Kw	7.5Kw	9.5Kw
Heater Power	1Kw	1Kw	1KW
Oil Tank Capacity	120L	170L	170L
Machine Weight	~ 1000Kg	~ 1450Kg	~2500Kg
Machine Size	120×90×210cm	200×90×240cm	170×90×250cm
Vane Pump	28L/min	28L/min	30L/min

What is a hot chamber die casting machine structure?

Hot chamber die casting machine with a suitable mold (die/tooling) can be used to produce zinc, lead, tin, and other low melting alloys die casting parts.

Small hot chamber horizontal die casting machine details structures:

A hot chamber machine contains a melting furnace pot, machine body & base, clamping mold mechanism, accumulator, hydraulic system etc. Now, we will show you the small hot chamber horizontal die casting machine details structures:

1. Front structure of hot chamber machine:

2. Back side of hot chamber pressure die cast machine:

3. Horizontal hot chamber die casting machine right side structure:

4. Hot chamber pressure injection machine left side structure:

There is a injection mechanism on the melting pot. Electric heating tubes be set on the pot bottom to melt metal alloy. Injection mechanism (cylinder plunger) is immersed in a molten metal bath of a metal holding furnace. Hydraulic station drives injection plunger punch molten metal from furnace gooseneck structure to die casting mould. Gooseneck is a metal feeding system, which attach the furnace pot to die casting machine.

The advantages of HD special melting pot goose-neck structure:

1. Pot material made from special stainless iron.

2. Molten metal alloy flow into hot chamber directly.

3. Gooseneck structure be cast together with pot.

4. Gooseneck structure connect with nozzle, which has a designed angle to keep molten metal level same with nozzle hole. That avoid many air be push into mold cavities.

Machine base is a hydraulic tank. It bears the furnace and machine body. Die casting machine body key structure is the clamping mechanism. The contains guide ways, mold platens, mold adjusting system etc.

Die casting machine pressure from the hydraulic station. Accumulator used to balance the machine pressure.

What is hot chamber die casting process?

Hot chamber die casting machine working process is same with cold chamber die casting. Using pressure，force molten metal through die casting machine chamber to a pre-shaped mold cavity.

Hot-chamber die casting key characteristic: the metal be heated inside the casting machine rather than a separate machine or furnace.

As hot chamber casting machine injection mechanism is immersed in the molten metal and connect with machine body by gooseneck metal feeding structure, it also known as goose-neck machines.

Hot-chamber casting machines feature a built-in furnace, in which metal is heated to achieve a molten state. A hydraulic-powered piston that forces molten metal out of the pot and inject into the die.

Hot chamber die casting process,is very fast. Normally one die casting cycle about 7shots per minute. The machine is not suitable for high melting point metal. it’s ideal for low melting point  metal such as: zinc alloy (~400℃), lead alloy (~320℃)and tin alloy.

Hot chamber die casting detail process:

1. Melting Furnace Pot

Electric heating tubes heat metal alloy to molten state. (If first time use the melting pot, no alloy cover the electric heating tubes, we need pour molten alloy to the pot or use burner to melt metal blocks in pot firstly. When metal alloy covers the heating tubes, machine electric heating method can be used. )

2. Hot Chamber Injection Process

1^st. Die casting die is clamped and the injection plunger rises, opening the hot chamber hole, allowing molten metal flow into the chamber cylinder.

2^nd. The plunger seals the hot chamber hole, pushing the molten alloy through the gooseneck and nozzle into the mold cavities where it is held under pressure until metal alloy solidifies.

3^rd. After the metal has solidified in the cavity, the plunger is withdrawn.

4^th. Die casting machine movable platen move back and mold opens. Die casting parts be eject out from movable die half by ejector pins.

5^th. Lubricating and cooling mold cavity. Die casting mold temperature is about 150℃.

6th. Mold closes and to start the next injection cycle.

More about hot chamber die casting process please view video:(youtube: https://youtu.be/k2nq4q4CYao)

About the cold chamber die casting process please view video: (youtube: https://www.youtube.com/watch?v=LCafa6yLESc)

For your new die casting project, please feel free to email us: cnkylt@aliyun.com We will choose suitable machine types, suggestions of mould design, provide free die casting samples.

What are the advantages and disadvantages of hot chamber die casting?

Same with Cold chamber die casting, Hot chamber die casting also is HPDC process (High pressure die casting). They are forcing molten metal into steel molds (dies) with high pressure. Then we can got high precision die cast products.

Hot chamber die casting has the following five advantages:

1. Long die life

Normally zinc die casting molds (dies) life is about 200,000times. Longer than cold chamber die casting die. (Cold chamber die casting mold life is about 50,000times.)

2. Mass production

The machine functions automatically, fast & high productivity, can be multi cavities in one mold. Normally hot chamber machine one minute shot 7times. For example, the metal zipper puller. In 20T hot chamber die casting machine, one minute inject 7-10times, one mold has 10-20pcs pullers.

3. High precision, thin wall, good surface

As hot chamber die casting machine most used to manufacture zinc parts. Especially for electronic connector, box of distributor& brancher of cable TV system. They are made from zinc alloy, surface with precision screw threads and thin wall is required. Excellent dimensional and surface accuracy allows the zinc parts can be plated directly.

4. Saving cost

In hot chamber die casting process, Zinc die casting parts has smooth surface, precise dimensions. They can be used to assembly without machining. Due to the die cast parts no burr and flash, that reduce processing equipment and labors, Saving cost.

5. Surface treatment

Shacking polish, shot blasting, painting, powder coating, electroplating etc surface treatment is allowed.

Hot chamber die casting machine disadvantages:

• Hot chamber machine only suitable for low melting point metal. So, it only can manufacture zinc, tin, lead alloy. For aluminum, copper etc, we use cold chamber machine.

• Under High pressure, molten metal by injected into die cavities with air holes. That cause casting part body has mini air holes. Can not be heat treated.

• As the die cost is high, It is not suitable for small batch production. Normally, for small quantity or samples, we provide CNC prototyping service. That can got a sample from 3D design to finished part fastly.

Hot chamber die casting machine working process please view video:

1. Full auto horizontal die casting machine working video 

https://youtu.be/k2nq4q4CYao

2. 12T Vertical die casting machine working video 

https://youtu.be/6yC_AQaJMTU

3. 20T Vertical die casting machine fishing bait making 

https://youtu.be/SliYJiJdz5I

4. 20T Zinc/Zamak end wire casting machine L-type machine

https://youtu.be/0bVZTJE6zT4

5. 20T Vertical wire ZINC/ZAMAK end die casting machine 

(wires position locking mechanism-wire retainer)

https://youtu.be/56BcfLUQAOw

Cold chamber die casting working process please view video:

1. Manual cold chamber die casting machine video:

https://www.youtube.com/shorts/npYbgva3NK8

2. Auto cold chamber die casting machine video:

https://www.youtube.com/watch?v=LCafa6yLESc

More information of hot chamber die casting machine price, or die casting mould, please feel free to email us: cnkylt@aliyun.com We will choose suitable machine types, suggestions of mould design, provide free die casting samples.