A blog discussing sensors and instrumentation. New products, new technologies, and interesting applications. Types of sensors and instruments discussed include: Analyzers, Color Sensors, Displacement Sensors, Flow Sensors, Industrial Weighing, Instrumentation (Data Acquisition), Load Cells & Instrument Hardware. Machine Controls, Pressure Gauges, Pressure Sensors, Sanitary Sensors, Strain Gages, and Temperature Sensors. Courtesy of AP Corp.
The QSO® Quick Shut-off Valve from Glycon Corporation
A better quick shut-off non-return valve for the Plastics Industry.
Injection molding applications require two important criteria from a non-return valve:- Rapid material shut off for part weight consistency
- A smooth, high-flow profile to prevent material degradation.
The Glycon QSO® valve is the only valve that provides you both. The result is higher quality parts, fewer rejects, improved yield, and a better return on every pound of material you run.
Compared to traditional ball and ring check valves, only the QSO® Quick Shut-off Valve delivers both high flow and raid shut-off. Plastics molders prefer the QSO® because:
- The QSO® ends short shots!
- The QSO® reduces scrap rates
- The QSO® optimize part weight consistency
- The QSO® prevents material degradation
- The QSO®is perfect for filled materials
- The QSO® eliminates need for decompression or “suck back”
- The QSO® maintains smooth material flow path
- The QSO®is designed for long lasting and durable
Which Melt Pressure Sensor Is Good for My Application?
So how do I choose the right melt pressure sensor for my application?
A sensor is defined through the following specifications:
- Pressure Range
- Process connection
- Electrical output and connection
- Capillary configuration (rigid/flexible)
There are more variables come into play, but let's focus on these four since they are the most critical.
Melt Pressure Sensor Pressure Range
Melt Pressure Sensor Process Connection
Melt Pressure Sensor Electrical Output
A pressure sensor is an electro-mechanical device that converts a mechanical effect (pressure deflects a thin piece of metal) into an electrical signal through a strain gauge. The strain gauge changes its resistance by following the deflection of the metal piece. In the simplest case, the strain gauge signal can be used directly to feed a read-out device to display the pressure. In order to accommodate industry-standard equipment, such as process control equipment, manufacturers like Dynisco supplies sensors with different amplified output options such as 4-20mA or 0-10V.
Melt Pressure Sensor Capillary Configuration
A typical pressure sensor has a liquid-filled capillary that connects the process-connection diaphragm (which is deflected by the process pressure) and the measuring diaphragm (where the strain gauge is bonded). This capillary is necessary to create a heat barrier, as the strain gauge cannot withstand the typical process temperatures at plastics processing. Also, the sensor's electronics need to be kept away from heat sources as well as possible. To find a suitable mounting location for the electronics, countless combinations of the rigid stem and flexible connection lengths are available.
Other Considerations in choosing a Melt Pressure Sensor:
- Diaphragm materials
- Diaphragm coatings
- Approvals and certifications
Web Tension Control in Paper Production
BLH Nobel web tension systems comprise off-the-shelf standard modules and electronics, as well as customized systems. BLH Nobel designs force measurement modules according to the customers’ mechanical requirements and forces, ranging in size from just a few Newtons to mega-Newtons. The combination of digital signal amplifiers and stable force transducers means that BLH Nobel systems can handle anything from applications with a low tare and large forces, to those with a large tare and small forces.
For more information about BLH Nobel products in New England, contact AP Corp. Call them at (508) 351-6200 or visit their website at https://a-pcorp.com.
EASYHEAT Induction Heaters from Ambrell Corporation
Flameless, non-contact induction heating minimizes energy waste by focusing energy only on the part and zone to be heated. Select and monitor power levels from the front panel LCD and sealed touch pad. Remote power control is available for employing contact inputs, analog inputs or optional serial data port. Easily control the length of the heating cycle with a built-in programmable digital timer.
Download the Ambrell EASYHEAT® 500 Watt to 10 kW Induction Heater Catalog here.
For more information about Ambrell products in New England, contact AP Corp. Call them at 508-351-6200 or visit their website at https://a-pcorp.com.Melt Processing of Thermoplastics for Extrusion and Injection Molding
Melt Processing of Thermoplastics for Extrusion and Injection Molding Table of Contents:
- Introduction
- Hygroscopic Behavior
- Granule Characteristics
- Thermal Properties and Heat Input Thermal Stability
- Flow Properties
- Thermal Properties and Cooling Crystallization and Shrinkage Molecular Orientation