Borescope for Mold Inspection: How to Inspect Internal Cavities and Channels

Molds and tooling often contain narrow cavities, cooling channels, holes, and internal structures that are difficult to inspect manually.

Even when the external surface appears normal, internal contamination, damage, wear, or deposits may affect mold performance.

A mold inspection borescope can provide visual access to selected internal areas without completely dismantling the tooling.

What Can a Borescope Inspect in a Mold?

Depending on the mold design, a videoscope may help inspect:

• Mold cavities

• Cooling channels

• Ejector areas

• Internal holes

• Narrow passages

• Tooling surfaces

• Deposits

• Corrosion

• Visible wear

• Foreign material

Why Is Mold Inspection Important?

Mold condition can affect:

• Product surface quality

• Dimensional consistency

• Cooling performance

• Production efficiency

• Tool life

• Maintenance requirements

Regular visual inspection can help identify visible problems before they become more serious.

Choosing a Mold Inspection Camera

Small Diameter

Many mold passages are narrow. A small-diameter probe may be necessary.

Probe Length

Deep cavities and long cooling channels may require additional probe length.

Articulation

Articulation allows inspectors to position the camera around internal structures.

Side View

A side-view camera can be useful when inspecting surfaces around corners or along the side of a channel.

Lighting

Internal cavities can have complex reflective surfaces. Appropriate illumination helps produce useful images.

Inspecting Cooling Channels

Cooling channels are particularly important in many molds.

A borescope may help identify:

• Deposits

• Corrosion

• Blockages

• Foreign material

• Visible surface damage

The inspection results can help determine whether cleaning or further maintenance should be considered.

Mold Cavity Inspection

A borescope can also provide visual access to cavity surfaces.

Inspectors may document:

• Scratches

• Deposits

• Surface damage

• Corrosion

• Foreign material

• Visible wear

For precision quality control, the borescope should be selected according to the required field of view and defect size.

A mold inspection borescope is a useful visual inspection tool for difficult-to-access mold cavities, cooling channels, holes, and tooling structures.

Probe diameter, length, articulation, viewing direction, and image quality should be selected according to the mold geometry.