1. Trial Run Steps and Procedures
A. Before the trial run, check if the mold is fully assembled and if the raw materials are properly dried.
B. Before changing molds, apply rust inhibitor to the mold before removing it from the machine, then remove the mold, return it to its designated location, and fill out the record sheet.
C. When installing the mold, align the mold with the center point before mounting it. The mold must be securely locked, and the high-pressure clamping must be checked for effectiveness. The clamping force depends on the mold size: large molds require 80-90 PMa; small molds require 40-65 PMa. After adjusting the high-pressure clamping, adjust the mold opening and closing speed to normal speed, and then adjust the low-pressure time, distance, pressure, and speed. Low-pressure operation is very important during normal production; mold damage is often caused by incomplete low-pressure operation.
D. Purge the material barrel: remove any other colored raw materials and impurities from the barrel, reduce the injection pressure, holding pressure, injection time, and holding time to 50 PMa; then increase and adjust to the required pressure based on the product condition. Compare samples molded at low, medium, and high pressures to analyze the runner system.
E. Before the trial run, test the mold manually to confirm that the demolding action is smooth and the return to position is correct. Spray release agent onto the mold cavity before the injection molding process. After molding, adjust the demolding method and position.
F. The number of trial runs should be based on the production management notification. The mold department must be notified before each trial run to confirm the trial run procedures. After producing the samples, review them with the customer. After the review is completed, fill out the molding condition record sheet and the mold condition sheet.
G. When the mold trial is completed, spray the mold with rust inhibitor, and send the mold to the mold department for modification.
H. Each mold trial must follow the above procedures. Accurate mold trial time and personnel assigned by superiors are required for mold trials. Do not conduct mold trials without permission.
2. Key Precautions for Mold Trials
When we receive a new mold for prototyping and testing, we always hope to get results quickly and pray for a smooth process to avoid wasting man-hours and causing problems. However, we must remind you of two points:
A. As soon as the machine is turned on, inspect the mold to confirm that all mechanisms are functioning smoothly. If there are any problems, immediately stop the operation to avoid unnecessary serious consequences. If there are no problems, repeat the reciprocating motion several times before proceeding to the next step.
B. Before performing the injection molding operation, confirm the mold clamping force. The first molded product should only be filled to 80%. If there are no problems, test under normal conditions, confirm that the sample meets customer standards, and then proceed to the next step of high and low pressure testing. High pressure is 20 PMa higher than normal conditions, and low pressure is 10 PMa lower than normal conditions. Analyze the mold accordingly. Please remember that all operations must start with low pressure.
We can accommodate a variety of project requirements to meet your specific injection molding needs:
Mold clamping pressure from 25 tons to 1,700 tons
Multi-material molding (2-, 3-, and 4-shot capability), over-molding, insert molding, and consumer packaging molding
In-mold value-added operations (in-mold labeling, assembly, and closing)
