Sage-Tips

What is toggle clamping system?

Toggle clamping is mainly used for high speed injection molding, whereas for precision parts, ram clamping is recommended. Toggle injection machines tend to increase tonnage as they run due to thermal expansion of the mold, tie bars, toggle links and plattens.

What is clamping force in injection molding?

Clamping force refers to the force applied to a mold by the clamping unit of an injection molding machine. In order to keep the mold closed, this force must oppose the separating force, caused by the injection of molten plastic into the mold.

Why the clamping force is important in injection molding process?

What is Clamp Force? The machine needs to have enough clamp force to hold the mold closed to withstand the plastic pressure that is being developed inside the mold cavities and the cold runner.

What are the major factors affecting an injection Moulding process?

There are six major factors that remain critical to the plastic injection molding process….These include:

• 1) Barrel Temperatures.
• 2) Plastic Flow Rates.
• 3) Plastic Pressure or “Screw Back” Pressure.
• 4) Nozzle Temperatures.
• 5) Plastic Cooling Rates and Times.
• 6) Plastic Melt Temperatures.

What are the two basic types of clamping units?

What are the two basic types of clamping units? The clamping units are: (1) mechanical toggle clamp and (2) hydraulic. In addition, there are hydromechanical units which combine hydraulic and mechanical actuations.

What is hydraulic clamping unit?

The hydraulic clamping is the pipe gripping done through by clamps which execute the opening movement and closing hydraulic pressure mode, unlike standard machines where all these movements are manually done. This is one of the most popular features of large diameter welding machines such as TracStar, mMegaMc.

What does clamping force mean?

The amount of force applied to a workpiece by closing and locking a clamp is called clamping force. It is an important calculation because it allows a clamp to have adequate capacity to resist external machining forces.

What factors affect the selection of a suitable Mould material?

10 Factors Influence Injection Mould Quality

• Mould Steel. Steel is a decisive factor of mould quality, a reasonable choice of steel is the most important.
• Structural Design.
• Mould Making.
• Standard Part.
• Mould Bumping.
• Polishing.
• Mould assembly.
• Hot Runner or Cold Runner.

How does injection Moulding affect the structure?

Injection moulding enables complex shapes to be mass-produced with a high level of efficiency and manageable costs. A wide selection of materials allows engineers to exactly match the physical properties they require for any given product.

What are the three functions of the clamping unit during the injection molding cycle?

The function of the clamp unit is to hold and close a mold, build force, open the mold, and eject the parts.