RJG, Inc.

3111 Park Dr.
Traverse City, MI 49686 US


A Message from RJG, Inc.

As Seen In Plastics Technology

Five Questions to Ask Before Instrumenting a Mold
There are plenty of good reasons for putting sensors in a mold—but what is most important for your application? Answer that first, before considering what type of sensor to use and where to locate it.

RJG Expands Online Training Offerings
Five new course cover tool launch, part design, mold design, machine performance and systematic molding for LSR.

RJG Training Facility Adds Bole Machine
RJG’s Gibsonville, N.C. training site has added a 110-ton servodriven hydraulic Bole consignment machine.

Fast, Simple, Low-Cost Method Unveils ‘True’ Melt Temperature
Long a mystery to injection molders, actual temperature of melt entering the mold is said to be revealed by an easy procedure that is repeatable and takes less than a minute.

Injection Molding: RJG Adds Virtual Training, Consultation
In response to the Covid-19 crisis, RJG has launched online interactive training, free live webinars and personalized remote consultation services.

Molder Gets Into World-Class Shape
Shape Corp.’s Grand Haven, Mich., facility challenges itself and its employees to run leaner, pushing productivity and efficiency to new limits.

RJG Opens New Training Lab in Germany
RJG Germany GmbH opened its new training lab on Jan. 1, 2020, including a classroom that seats up to 20 students and a fully-equipped lab for hands-on experience.

HRSFlow and RJG Pair Technologies for Advanced Process Control
By pairing HRS Flow’s servo-driven FLEXflow hot runner with RJG’s sensors and eDART controller, the collaborators say they’re able to sequence mold filling based on what’s actually happening in the tool vs. time or screw position.

RJG training Systematic Molding

Molding Better Molders, One Class at a Time
Founded by and named for Rod Groleau, RJG grew out of an appreciation for two burgeoning needs of the plastics industry: training to help people better understand the molding process and equipment to let them actually see what’s happening inside that process.

How Second-Stage Injection Speed Influences Your Process
As an injection molder, you’re familiar with first-stage fill-speed profiles and second-stage pressure settings, but have you considered the function of second-stage speed, or “hold flow”? Here’s what it does and how it affects your molded part.

Plastics training lab under construction at Central Community College.

RJG Partners with a Nebraska Community College on Injection Molding Training Lab
RJG and other partners are contributing to new plastics training lab at Central Community College in Columbus, Neb.

Molding Lab Opens at Nebraska Community College

RJG Helps Bring Molding Training to Nebraska College
Central Community College (CCC) to embed RJG education into curriculum when new training lab is completed in the beginning of 2020.

RJG’s newest 6-mm strain-gauge indirect cavity-pressure sensor.

Injection Molding: Smallest Cavity-Pressure Sensor With Higher Force Rating
Indirect sensor for high cavitation can be used with larger ejector pins.

Instilling pride of workmanship is a top goal of Natech’s in-house training programs. Here, head quality auditor Andrew Dunham examines electrical enclosure parts with operator Carla ____.

To Succeed in Manufacturing, Focus on Your People First
It’s not easy being a custom injection molder in the NYC metro area. For Natech Plastics, the key is developing employees’ skills and commitment.

This automotive A-pillar is molded of a PC/ABS or PC/ASA alloys, so its viscosity is relatively high to start with

How to Manage Pressure Loss in Injection Molding
Achieving a process window wide enough to ensure consistent part quality depends on achieving sufficient pressure at end of fill.

GW Plastics Queretaro toolroom

Filling a Precision Molding Niche in Mexico
Originally opened and dedicated by Mexican President Vicente Fox in 2006, GW Plastics has expanded the business and capabilities of its facility in Querétaro, adapting and evolving along with that country’s thriving injection molding market.

One of eight Arburg all-electric machines in a clean room at Plastikos.

Digital Manufacturing: Two Medical Molders Embrace Industry 4.0
‘Digitalization’ and ‘connectivity’ are loaded terms—shorthand for a whole new way of doing business. It can’t be accomplished in one go. But two Midwest molders in the sensitive medical field are already feeling the benefits of their initial steps in that direction.

injection molding fill time

Fast or Slow: What’s Better for Injection Molding Fill Times?
If you’re talking zombies or injection molding fill time, there is a debate to be had about fast vs. slow.

Up to Snuff on Scientific Molding? Then it’s Time to Mold ‘Systematically’
Scientific molding is centered around learning about key molding principles and theories. The strategic application of those principles and theories is what’s known as systematic molding.

Arburg ALS MES dashboard

‘Smart Data’: The Rise of the ‘Dashboards’
For North American plastics processors, NPE2018 offered the broadest exposure yet to the bundle of trends and technologies known as Industry 4.0 or the Industrial Internet of Things (IIOT).

Autodesk Moldflow simulation

Injection Molding: New Source of Moldflow Training
RJG Inc. has added Moldflow training to its course roster.

Product Categories of RJG, Inc.

Closed-loop Process Control Systems
Consultants--Design, Manufacturing, Purchasing
Flow Monitoring/Control Devices (for Liquids)
Machine Monitoring/Alarm Systems
Motion or Position Controls
Pressure Controllers, Monitors
Pressure Sensors, Transducers
Recording Instruments
Scheduling, MRP, Production and Inventory Management Systems
Sequence Logic Controls
SPC, SQC Systems
Training Programs in Plastics
Troubleshooting, Problem Solving Systems