Injection Molding Machinery

Injection molding is a manufacturing technique of shaping plastic parts. Injection molding machines, also known as presses, hold the molds in which the components are shaped.

The Injection Machine consist of a Feeing hopper, resin is fed through the hopper to the Screw and Barrel, were the resin is heated to the appropriate melting temperatures.

Molten plastic is injected at high pressure into a mould, which is the inverse of the product's shape.

Injection molding is the most common method of production, with some commonly made items including bottle caps, motor vehicle components, outdoor furniture and in all kinds of industries.

For the injection molding cycle to begin, four criteria must be met: mold open, ejector pins retracted, shot built, and carriage forward. When these criteria are met, the cycle begins with the mold closing. This is typically done as fast as possible with a slow down near the end of travel.

M.T.P. can advise supply the equipment for your plant, train your staff and take care of any spare parts that may be required in the future.

All in all Pitac Gulf FZC supply a one stop Turnkey Plant service

Some Typical Complications

 Burned or Scorched Parts: 

• Melt temperature may be too high. 
• Polymer may be becoming trapped and degrading in the injection nozzle.  
• Cycle time may be too long allowing the resin to overheat.

Warpage of Parts: 

• Uneven surface temperature of the molds. 
• Non-uniform wall thickness of mold design.

Surface Imperfections: 

• Melt temperature may be too high causing resin decomposition and gas evolution (bubbles). 
• Excessive moisture in the resin. 
• Low pressure causing incomplete filling of mold.