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Bakelite & Melamine Injection Molding Machine
 
 
Specification: H series are from LCH-H80 to LCH-H500 (specification chart); V series are from LCH-V100 to LCH-V850 (specification chart).
Computer: Compatible with B or D type of computer.
Hydraulic Circuit:

Compatible with the followings:
Proportional Pressure & Speed Type
High Speed Type
Energy Saving Servo Hybrid Type
Energy Saving Variable Pump System
Energy Saving Inverter System
Accumulator Injection Closed-Loop Type
Semi Closed-Loop Type

More compatible types available, please contact us for detail.

 

There are two types of injection features: the thermoplastic type and thermosetting plastic type. Thermoplastic type material can be recycled and reusable, while the runner or material waste for thermosetting plastic type cannot. Usually, the material is thermoplastic type if the product material is plastic; the material is thermosetting type if the product is Bakelite and melamine.

The difference between Bakelite machine and normal injection machine is that normal injection machine uses heater band method to heat, while the Bakelite (thermosetting) injection machine uses mold temperature controller to heat. That is, the thermosetting injection machine first heats the material up to reach 60 to 90°C inside barrel so the material flows. Then, it injects the material to the mold, which the mold needs to be heated up to reach 160 to 190°C in order to melt the material and form. Therefore, the thermosetting injection machine uses mold temperature controller to heat. In few cases, it uses heater band to heat the mold that causes extremely high temperature on the mold, a clamping unit must be equipped with the insulating plate to prevent harm from the mold base to operators.

During the injecting operation, the injecting action must be all the way to the end and must not store any waste material in order to prevent material becomes hard and solid and blocks the next cycle. The barrel temperature must be controlled accurately and steady to ensure product quality and stability. One must completely clean up all remaining material in the barrel before calling it a day to prevent material forms inside the barrel, which might damage or even break the entire barrel and screw.

When designing the mold, it must have a good air vent system. If the mold does not have an air vent system, then the machine mechanism design must include an air vent function. Even if the two stage ejector knock out action is available for the mold design, the air vent function should still be included for the machine mechanism design so the product and runner can be easily separated after mold opens.

All Bakelite products have flashing, which requires an extra process to modify it. Sand blow or rotation tumbler are two primary methods to modify the flashing. There are also several different types for sand blow method, but in short, small size products are suitable for rotation type sand blow, while large size products are suitable for conveyer type sand blow that prevents the damage to the object angle.