Mold Defect Solution

Problem

Cause

Solution

Parts adhere to tool.

1. Improper application or curing of
release agent

2. Release agent is inadequate.

3. Compound or process change.

4. Dirty tool surface.

Follow recommended procedure for application of release agent

Check release agent for contamination ndstability.

Insure original testing parameters.

Insure the tool surface is clean and properly rinsed and neutralized

Excessive transfer of release agent to
molded parts (knit lines, flow lines, non- fills).Release agent transfers to injected
rubber thereby preventing rubber to
rubber bonding.

Note: If using sacrificial release agent,
evaluate a semi-permanent.

1. Over application of mold release.

2. Improperly cured mold release

3. Dirty tool surface

4. Incorrect dilution ratio.

Apply less release agent to mold surface.
I
nsure proper tool temperature and application of mold release. Consult theTDS.

Insure the tool surface is clean and properly rinsed and neutralized.

Insure proper dilution of mold release on concentrated materials

Inability to achieve proper number of
multiple releases.

1. Improper application or curing of
release agent

2. Dirty tool surface

3. Compound or process change

Follow recommended procedure for application of release agent (base coat and touch up).

Insure the tool surface is clean and properly rinsed and neutralized.

Insure original testing parameters are being used.

Localized sticking. Molded parts tear;
rubber sticks in the mold.

1. Uneven or non-uniform
application of release agent

2. Dirty tool surface

Follow recommended procedure for application of release agent.

Insure the tool surface is clean and proper maintenance is followed.

Build-up on molding surface (release
agent or rubber). Overall tool
cleanliness.
Note: If using sacrificial release agent,
evaluate a semi-permanent.

1. Over application of release agent.

2. Poor release of molded part.

Follow recommended procedure for application of release agent.

Refer to solutions above.

Parts Cosmetics. Defects associated with
appearance and/or part design.

1. Uneven or non-uniform application of release agent

2. Dirty tool surface

Follow recommended procedure for application of release agent (base coat andtouch up).

Insure the tool surface is clean and properly rinsed and neutralized.