Mold Maintenance

Tooling: Hot Sprues—Mold a Disk or Not?
Having a hot sprue shut off against the parting line versus intentionally molding a thin disk has been the subject of controversy for many years.

How Sprue Pullers Help Prevent Molding Issues: Part 2
A vital secondary function of sprue pullers is to act as a cold well to trap solidified material left in the machine-nozzle tip.

Tooling: Dealing with Sprue Bushings On the Production Floor
Causes of and solutions to some problems you probably deal with every day.

Locating Rings, Platen Damage, and the Center of Gravity: Part 3
Selecting the right locating ring and putting it to good use takes careful consideration.

Locating Rings and Platen Damage: Part 2
Selecting the right locating ring and putting it to good use takes careful consideration.

A Better Way
A well-run preventive maintenance program can actually help you make money.

Solving Issues with Gloss
Your problem may be related to tooling, material, processing, or combinations thereof. Here’s how to find the root cause.

TOOLING: Repairing Molds in the Press: Part 3
This is the final part of a series on tooling in the press. This column will cover repairs that can be accomplished in the press.

TOOLING: Designing Molds for Easy Cleaning & Maintenance in the Press
Pay attention to water leaks and rust, proper grease selection, vent buildup, and checks for wear.

TOOLING: Designing Molds for Easy Maintenance in the Press, Part 1
Attention to design of cooling, ejection, and slides can save downtime and maintenance headaches.