Polishing Treatment for Plastic Molds
February 22, 2024
Polishing Treatment for Plastic Molds With the widespread application of plastic products, such as daily-use items and beverage packaging containers, there is often a requirement
Parting-line Flash: Guide for Avoiding
About the parting-line flash
1. Phenomenon of parting-line flash
A phenomenon in which the resin squeezes out and solidifies on the parting line of the mold.
2. Causes of parting-line flash
- There is a gap in the mold
- Foreign matter is attached between the mold plates
- Rising internal pressure(insufficient vent)
- High injection pressure
- Insufficient mold clamping force
- Large material supply
- High resin temperature
- Long injection pressure retention
- Fast injection speed
3. Measures to avoid of parting-line flash
- Eliminate mold gaps
- Clean the mold
- Attach a gas vent to the sprue and runners
- Degas just below the sprue part and at the runner end.
- Increase the air vent near the final filling part of the product part.
- Lower injection pressure
- Increase mold clamping force
- Proper supply amount
- Adjust the cylinder temperature to an appropriate temperature
- Make the pressure holding time appropriate
- Slow the injection speed
- By increasing the number of vents, the internal pressure is reduced and burr is prevented.
- By taking good venting measures with the mold, there is no air resistance in the mold and molding at low pressure is possible.
Related Post
Injection Molding Techniques for TPE and TPR
January 23, 2024
Injection Molding Techniques for TPE and TPR Injection Molding Techniques for TPE and TPR 1. Dry the TPE and TPR material before injection molding It
Winter Maintenance Measures for Injection Molding Machines
January 10, 2024
Winter Maintenance Measures for Injection Molding Machines As winter approaches and temperatures gradually drop, a cold chill envelops the earth. While ensuring personal warmth, it
Assessment Regulations for Mold Trial Exceeding 3 Times
December 21, 2023
Assessment Regulations for Mold Trial Exceeding 3 Times Assessment Regulations for Mold Trial 1. Purpose The purpose of this regulation is to standardize the work of