Rubber Injection Moulding Machine

Injection molding is a type of Rubber Molding where the rubber liquid is forced into a mold. After the rubber becomes solid, the mold is taken apart and the product is revealed. It is similar to blow molding in the sense that the liquid rubber is forced into the mold except air, causing the mold to expand and fit the liquid rubber to its predetermined specifications.

The machine process involves forcing rubber through a nozzle into a closed, heated mold. This method involves shorter production cycles than the compression method. There is a selection of differentiated hydraulic system and electric system in these machines.

An injection molding machine is suitable for producing different types of rubbers like :

• Nature rubber
• Synthetic rubber
• Medical/ Pharmaceutical usage rubber
• Oil resistance rubber
• Heat resistance rubber

Some of the important features that are considered while purchasing a rubber injection molding machine are:

• Clamping Force
• Clamping System
• Injection Volume
• Injection Pressure
• Screw Diameter
• Screw R.P.M
• Clamping Stroke
• Min Mold Thickness
• Heating Plate Capacity
• Motor Power
• Total Electric Power
• Overall Dimensions
• Machine Weight

Some of the essentials of a good rubber injection molding machine:

• Easy to operate and maintain
• Easy to set up the temperature condition and time etc
• Numbering of molds possible
• Remaining quantity of rubber maintains the condition of immature molding (by cooling up to the nozzle range)
• It is easy to replace the mold (with the help of ball transfer)
• Electronic proportion control system to save power and increase precision