Blow molding is used in the manufacture of hollow plastic parts, creating common components like PET bottles, HDPE jugs, and jerry cans. Variations on the process include extrusion blow molding (EBM), injection blow molding (IBM), and injection stretch blow molding (ISBM).
Avoid Four Common Traps In Granulation
Today, more than ever, granulation is an important step in the total production process. Our expert explains a few of the many common traps to avoid when thinking about granulators
Blow Molding: Essential Reading
Understanding the ‘Science’ of Color
And as with all sciences, there are fundamentals that must be considered to do color right. Here’s a helpful start.
Solve Four Common Problems in PET Stretch-Blow Molding
Here’s a quick guide to fixing four nettlesome problems in processing PET bottles.
Best Practices in Processing with Recycled Material
Inside: What brand owners are planning, and how processors ahead of the curve have already responded.
SPE Schedules First-Ever 'Virtual' ANTEC
Attendees can listen to keynotes and presentations live. Many presentations will also be recorded.
Use a DOE to Improve Consistency of Your Resin-Drying Process
Conducting a drying design of experiments (DOE) will ensure your polymer is properly dried every time. Here’s how to do it.
FAQ: Blow Molding
What Are Common PET Stretch-Blow Molding Problems and How Can I Fix Them?
Common problems:
1. Pearlescence and haze
2. Insufficient top-load strength
3. Insufficient base clearance or rocker bottom
4. Drop-impact failure
Fixes: https://www.ptonline.com/articles/solving-four-common-problems-in-pet-stretch-blow-molding
How to Fix Uneven Wall Thickness in Stretch Blow Molding?
There are a number of conditions that must be maintained in order to achieve the described result. Following are the various issues that can skew wall thickness, in order of relevance:
Off-center gate
Uneven heating or cooling
Small stretch ratios
Part failure along the parting line is related to material processing conditions, parison geometry, molding conditions, mold design, or a combination of these factors. Developing the optimal material shape inside the part at the pinch-off is a key to building parting-line integrity.
Blow Molding Suppliers
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- Dip-Blow or Compression-blow Molding Machines
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- Parison Programmers
- Pre-expanders, Polystyrene Bead
- Presses, Polystyrene Bead
- Structural Foam Machines (for Thermoplastics)
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