30T Hot Chamber Die Casting Machine is applicable to produce non-ferrous metals with low melting point such as Zinc (Zn/Zamak), Tin(Sn) and Lead(Pb). lt is widely used in various industries including automobile and motorcycle parts, meters and instruments, daily-use hardware, and household appliances.
This machine consists of clamping system, injection system, furnace, electric auto-control system, hydraulic system, mold release agency spraying & die casting parts blanking system. And the machine can be operated manually, semi-automatically (single cycle), auto-matically (continuous loop). During normal operation, the whole machine can be operated full-automatically except to add metal alloy to the pot.
HD-30T hot chamber die casting machine adopts safety locking system, all machine actions are moved as per the programmable parameters. Any abnormal actions occur, the circulation system will stop working automatically to avoid accident.
30T Hot Chamber Die Casting Machine Specification and Parameters:
|SPACE BETWEEN TIE BARS
|TIE BARS DIAMETER
|INJECTION PLUNGER DIAMETER
|MAX CASTING AREA
|DRY CYCLE TIME
|MELTING POT CAPACITY
|OIL TANK CAPACITY
|WEIGHT OF MACHINE
30T hot chamber die casting machine Machine structure & operational principle:
1. Clamping system of hot chamber die casting machine
The machine adopts four-hole double-crank shaft clamping system.All platens are set in the four high precision guide pins, and worked smoothly, the locking force well-distributed.
The clamping system & the centerline of nozzle at 10°C angles to the plane, in order to avoid molten metal spill out from the nozzle.
Pull cut platen(die mounting plate) is set in the fixed mould platen. And pull cut platen can have short distance move. For clamping operation,pull cut platen and fixed mould platen close tightly, then mold connects to the nozzle. For opening operation, pull cut platen separates from the fixed mould platen, and mold breaks away from the nozzle,then the sprue be cut off & divide from the heat source. Convenient for stripping and avoid the mould superheat or nozzle temperature reduce to cause clogging phenomenon.
Adopts thread bushing mould adjusting device, convenient to adjust the distance of movable platen,pull cut platen and fixed mould platen to accommodate different thickness of molds.Finished the adjustment, use locking bolts & screw nuts to lock.
The whole clamping system fixed in the guide rail base which can be turned up and down. The clamping mechanism can micro-moved right and left. Those designs convenient to make the nozzle connect to recessed room of the mould correctly.
A adjustable sliding block is set under the movable platen to reduce the bending stress of the 4 guide pins, increase the machine rigidity, and reduce the attrition of the guide pins.
During working process, if the nozzle clogging, use the crank open the clamping mechanism(Note: hand clamp should be released firstly), then the fixed platen apart from the nozzle.(Max. moving distance :250mm). After clearing the fault,move the clamping mechanism close to the furnace. Use two special designed toggle rod reinforcement hand clamps to fix the fixed platen with the pot.
2. Hot chamber die casting machine injection system
Injection mechanism parts: Injection oil cylinder, injection chamber,injection plunger,piston ring,nozzle etc. The injection chamber and injection plunger are soaked in the molten metal of pot. The injection plunger raises up ,the molten metal flow into the chamber, injection oil cylinder drives the injection plunger and the plunger move down quickly, to press the molten metal through goose neck & nozzle to the mould cavity.
Nozzle adopts 1.5kw electric heater,this keep the molten metal temperature of the nozzle & pot is same (400-420°C), to keep the fluidity of the molten metal as good. Absorb the molten metal from the mid of the pot, to avoid impurities enter the cavity.
Cooling water ways are set under the injection oil cylinder, cooling water should be supplied no stop during the working process in order to avoid the oil cylinder overheat & damage the sealing ring. And cooling water still be provided after the furnace stop working, until the temperature drops under 100°C, then the water supply can be stopped.
3.Machine base of hot chamber die casting machine
Machine base is the groundwork of the machine ,also consist an oil tank. Oil tank used to cool the hydraulic oil, depress the barycenter, the machine can be worked more smoothly.
-4.1 Pump section
Electromotor drives the vane oil pump, overflow valve adjusts the pressure to keep the working pressure about 7-8Mpa, and to satisfy the requirements of clamping & injection.
The accumulator (16L) is adopted in the system,to insure large capacity oil can be supplied for injection action in a short time, and when electricity went off, the injection plunger can go-back automatically. When electricity went off, worker can push the manual button(at the end of the clamping valve) to open and clamp the mould.
One-way valve can avoid the oil flow back to oil tank when the machine stop working, shorten the increase-pressure time of the system.
The cooler cool the oil ,keep the temperature of oil tank under 55°C,to avoid the hydraulic oil go bad in high temperature. In winter, if the temperature below 0°C, should open the drain screw, draw off the water, to avoid the cooler be damaged after stop working.
Mesh pattern oil filter is set at the gate of oil suction pump, to avoid impurities enter the system, insure the hydraulic components work normally.
-4.2 Clamping section
Three-position four way electromagnetic valve control the controls the clamping oil cylinder, crossover is quickly and stable. Handwheel controls the throttle valve to adjust the clamp & open speed. Buffered device be set at the both ends of clamp oil cylinder, can reduce the impact force of oil cylinder plunger.
-4.3 Injection section
Consist by injection oil cylinder, two-position four way electro hydraulic directional valve, oil inlet restrictor valve, accumulator etc. Accumulator provides oil for the injection action,to insure high speed injection.
-4.4 Blanking action
Consist by blanking oil cylinder, two-position four way electro hydraulic directional valve, two-circuit one-way restrictor valve etc. Two-circuit one-way restrictor coltrols the blanding speed.
5. Painting system
Extrinsic compressed air through pneumatic triplex elements keep the system working. Air pressure adjust to 0.2-0.3MPa by pressure reducing valve.
6. Furnace system
Furnane has two type: fuel heating & electric heating (now, most is electric heating method). Furane body consists of refractory material, asbestos board, steel shell etc. For fuel heating use diesel as the fuel, fuel burner as the power. For electric heating, adopts heating pipes, heating power is 12kw.
Pot temperature is controlled by temperature controller.
7. Water cooling system
The main function is to cool the hydraulic oil, injection cylinder, mould etc. Oil pump start working, the water inlet, outlet valve of cooler should be opened at the same time. Heating the furnace, the cooling valve of injection oil valve should be opened, to avoid oil-seal be burned out. Stop heating, the temperature of pot decreased, then close the water valve. And because oil cooler's resistance is smaller against water, to insure the injection cylinder have enough cooling water, the water inlet valve of oil cooler must be turn down a bit appropriately, especially at low water pressure situation, must to check if have enough water be supplied to injection cylinder. If the bottom cover of cylinder is too hot, to improve the supply pressure of water is needed.
8. Electric control system
The power of the machine adopts 380v, 50hz four wire three phase AC power. Main motor is three phase 380v AC power; signal lamp, magnetic valve, temperature controller, fuel burner, heating system adopt single-phase 220v AC power.
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