Problem & Solution

Practical answers to common plastic material challenges

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Q

Bulging at the overly thick wall area of the product

A

In summary, the causes of the "Bulging at the overly thick wall area of the product" problem can be attributed to the combined action of multiple factors such as parison wall thickness at that location too large and local mismatch of the blow-up ratio. Solving this problem requires starting from ...

Blow Molding Bulging at the overly thick wall area of the product injection '2079851475616104457 wall thickness control blow-up ratio

Q

Poor venting of the blow mold

A

In summary, the causes of the "Poor venting of the blow mold" problem can be attributed to the combined action of multiple factors such as vent holes or vent grooves clogged or insufficient in number. Solving this problem requires starting from aspects such as clean the vent holes and add vent gr...

Blow Molding Poor venting of the blow mold injection '2079851475616104457 mold design venting design

Q

Unbalanced parison filling (multi-cavity)

A

In summary, the causes of the "Unbalanced parison filling (multi-cavity)" problem can be attributed to the combined action of multiple factors such as unreasonable runner balance design and large temperature differences among the cavities. Solving this problem requires starting from aspects such ...

Blow Molding Unbalanced parison filling (multi-cavity) injection '2079851475616104457 temperature control

Q

Product weight deviation

A

In summary, the causes of the "Product weight deviation" problem can be attributed to the combined action of multiple factors such as unstable injection volume and cavity wear causing dimensional changes. Solving this problem requires starting from aspects such as calibrate the injection volume a...

Blow Molding Product weight deviation injection '2079851475616104457 dimensional accuracy

Q

Excessive cooling of the core rod

A

In summary, the causes of the "Excessive cooling of the core rod" problem can be attributed to the combined action of multiple factors such as core rod cooling medium temperature too low or flow too large. Solving this problem requires starting from aspects such as appropriately increase the cool...

Blow Molding Excessive cooling of the core rod injection '2079851475616104457 temperature control cooling process

Q

Uneven bottle neck threads

A

In summary, the causes of the "Uneven bottle neck threads" problem can be attributed to the combined action of multiple factors such as insufficient venting of the thread cavity and parison temperature too low. Solving this problem requires starting from aspects such as add thread venting structu...

Blow Molding Uneven bottle neck threads injection '2079851475616104457 temperature control pressure regulation venting design

Q

Bottle body surface scars (flow marks)

A

In summary, the causes of the "Bottle body surface scars (flow marks)" problem can be attributed to the combined action of multiple factors such as unstable melt flow during parison injection and poor mold venting. Solving this problem requires starting from aspects such as optimize the injection...

Blow Molding Bottle body surface scars (flow marks) injection '2079851475616104457 mold design venting design surface quality

Q

Poor demolding (sticking to the core rod)

A

In summary, the causes of the "Poor demolding (sticking to the core rod)" problem can be attributed to the combined action of multiple factors such as core rod temperature too high and small product shrinkage rate. Solving this problem requires starting from aspects such as strengthen core rod co...

Blow Molding Poor demolding (sticking to the core rod) injection '2079851475616104457 temperature control de'2079851475616104453 shrinkage control

Q

Improper core rod temperature control

A

In summary, the causes of the "Improper core rod temperature control" problem can be attributed to the combined action of multiple factors such as unreasonable design of the internal cooling system of the core rod and insufficient cooling medium flow. Solving this problem requires starting from a...

Blow Molding Improper core rod temperature control injection '2079851475616104457 temperature control cooling process

Q

Parison scratched during transfer (deformation)

A

In summary, the causes of the "Parison scratched during transfer (deformation)" problem can be attributed to the combined action of multiple factors such as poor positioning accuracy of the transfer mechanism and transfer speed too fast. Solving this problem requires starting from aspects such as...

Blow Molding Parison scratched during transfer (deformation) injection '2079851475616104457 temperature control speed control

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