What are the problems encountered in injection molding?

Most Common Injection Molding Problems

• Flow Lines.
• Sink Marks.
• Vacuum Voids.
• Surface Delamination.
• Weld Lines.
• Short Shots.
• Warping.
• Burn Marks.

What is clamping in injection Moulding?

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.

What is mold clamping?

Injection molding is a manufacturing process for producing products by injecting melted plastic materials into a mold then cooling it to solidify it. Clamping force is necessary to hold the mold together against the pressure of the melted materials being injected to keep resin from spilling out.

What is the effect of injection pressure on part quality?

However, when about 95\% full, there will be a sudden spike in pressure that can cause flashing, or forcing the mold open prematurely. This can damage your parts as well as the machine. To avoid this, the injection pressure must be reduced in a controlled fashion, at the so-called changeover point.

How can the process of injection molding be improved?

Making wise and efficient use of your materials is another key tip for improving your injection molding process and the quality of your finished product. One thing to try is reducing the shot size. You’re probably tempted to use the largest shot size your equipment will allow, but take a moment to re-evaluate.

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 is clamp stroke?

Clamping Opening Force )Tons): the maximum force that a machine will exert to initiate the opening of the mold. Clamp Stroke(Max) Inches: the maximum distance that the opening and closing mechanism can traverse a platen.

How can safety be improved?

Make sure employees have the right tools and have regular equipment inspections. The right tools and equipment create a better product and a safer work environment. It’s also important that all equipment is cleaned, serviced, and inspected regularly. Machine malfunctions are one of the most dangerous workplace hazards.