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Latest Posts
  • Gregstrom Announces New Vice President of Sales
  • Thermoforming vs. Injection Molding: Tooling and Materials
  • Types of Thermoforming: Vacuum Forming vs. Pressure Forming
  • Ten Advantages of Rotational Molding
  • Rotomolding Materials for Plastic Parts and Products
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Corner Radiuses
Blog

Corner Radiuses for Rotational Molding

October 31, 2017 1597 views
Corner radiuses are part features that serve two main functions in rotational molding design. First, they distribute stress from the…
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Rotational Molding Design
Blog

Gregstrom Featured in Rotoworld Magazine’s “Swing Time” Article

October 18, 2017 3804 views
Gregstrom’s rotational molding capabilities were featured in the September 2017 issue of Rotoworld magazine. Learn more about the “Swing Time””…
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Draft Angles
Blog

Draft Angles and Rotational Molding

September 28, 2017 2731 views
Draft angles make it easier to remove a rotomolded part from a cavity. These tapers are measured in degrees per…
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Kiss-Off Ribbing
Blog

Kiss-Off Ribbing and Rotational Molding

August 25, 2017 2911 views
Kiss-off ribbing is a term that’s used in rotational molding to describe a solid, reinforcing structure that transmits a load…
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reinforcing ribs
Blog

Reinforcing Ribs and Rotational Molding Design

July 27, 2017 2689 views
Rotational molding design is an essential part of rotational molding, a plastics manufacturing process for creating strong, hollow parts with…
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Wall Thickness - Rotational Molding Design
Blog

Wall Thickness and Rotational Molding Design

June 27, 2017 3053 views
Rotational molding design requires close attention to more than just functional requirements, material and processing limitations, and production costs. As…
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Rotational Molding Design
Blog

Rotational Molding Design: An Overview

May 25, 2017 4347 views
Rotational molding design is an important part of rotational molding, a manufacturing method for producing strong, hollow plastic parts with…
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Rotomolded Plastic Parts
Blog

Rotomolded Plastic Parts vs. Metal Parts

April 27, 2017 5248 views
Rotomolded plastic parts can replace metal components in many applications. Plastics generally cost less than metals, but engineers can’t base…
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Rotational Molding for Plastic Tanks
Blog

Rotational Molding for Plastic Tanks

April 3, 2017 3418 views
Rotational molding for plastic tanks produces hollow plastic tanks for fluid handling and storage. Specific applications include water or wastewater treatment;…
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Heavy Gauge Thermoforming - Plastic Thermoforming Molds
Blog

Plastic Thermoforming Molds: Male Molds vs. Female Molds

February 27, 2017 6442 views
There are two types of plastic thermoforming molds: male and female. With male molds, the thermoplastic sheet is placed over…
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About Us

Gregstrom Corporation is a custom rotational molder and heavy gauge thermoformer that adds value to your projects.

For nearly 70 years, Gregstrom Corporation has been building lasting relationships with partners in industries like yours.

As a third-generation, family-owned business, our American-owned company stakes its reputation on a commitment to quality, customer service, and continuous improvement.

Featured Projects

Heineken Draught Keg Cooler

Heineken Draught Keg Cooler

August 10th, 2015

Refrigerated POP displays like this Heineken draught keg cooler need to be functional and attractive[...]
Plastic Chemical Feeder | Rotational Molding Services

Plastic Chemical Feeder | Rotational Molding Services

August 10th, 2015

Chemical feeders prepare and automatically dispense the chlorine that’s used to disinfect municipal [...]
Medical Laser Assembly | Pressure Forming Services

Medical Laser Assembly | Pressure Forming Services

August 9th, 2015

Medical laser assemblies need to meet multiple requirements. For this featured project, Gregstrom ap[...]

Portfolio

Plastic Chemical Feeder | Rotational Molding Services

Plastic Chemical Feeder | Rotational Molding Services

August 10th, 2015

Chemical feeders prepare and automatically dispense the chlorine that’s used to disinfect municipal [...]
Medical Laser Assembly | Pressure Forming Services

Medical Laser Assembly | Pressure Forming Services

August 9th, 2015

Medical laser assemblies need to meet multiple requirements. For this featured project, Gregstrom ap[...]
3D Printer Housing | Rotational Molding Services

3D Printer Housing | Rotational Molding Services

August 8th, 2015

Gregstrom is a custom rotomolder with complete assembly and testing services. Our portfolio of proje[...]

Blog

Gregstrom Announces New Vice President of Sales

Gregstrom Announces New Vice President of Sales

June 14th, 2019

Plastics manufacturer selects Clark Boyce, continues strong legacy of industry leadership and charts[...]
Thermoforming vs. Injection Molding: Tooling and Materials

Thermoforming vs. Injection Molding: Tooling and Materials

May 26th, 2019

Thermoforming vs. injection molding tooling and materials are important to consider when choosing a [...]
Types of Thermoforming: Vacuum Forming vs. Pressure Forming

Types of Thermoforming: Vacuum Forming vs. Pressure Forming

April 29th, 2019

Did you know that there are different types of thermoforming services? All of these manufacturing me[...]
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