Process Weighing, Web Tension, and Force Control Systems Applications in Pulp and Paper Production

BLH AP Corp

BLH Nobel is a leading supplier of specialized pulp and paper measuring devices. Over the years, they've built a strong understanding of pulp and paper manufacturers' process problems. Be assured that BLH Nobel has the best solutions to maximize productivity and performance.

DOWNLOAD THE BLH PULP & PAPER APPLICATIONS GUIDE HERE

Pulp and Paper Applications

  • State-of-the-Art Instrument for Weighing and Force Measurement
  • Web Tension Measurement Unit
  • Dynamic Resultant Force Measurement
  • Refiners Position and Pressure Control
  • Paper Rolls, Pulpers and Coating Kitchen

Micro-Measurements Strain Gage Instrumentation Catalog

Strain Gage Instrumentation

Explore Micro-Measurements complete catalog of data acquisition instruments.

Micro-Measurements offers a comprehensive range of specialty instruments for data acquisition. With Micro-Measurements instruments, you can capture fully corrected, accurate engineering-unit data with minimal effort. Their special-purpose equipment, backed by highly skilled engineers' expertise and knowledge, complements strain gage installation integrity and instrument calibration.

DOWNLOAD THE CATALOG HERE

Product Range:

  • High-speed data loggers
  • Single-channel devices
  • Portable indicators
  • Multi-channel data acquisitions systems
  • High-bandwidth signal conditioners
  • Signal conditioning amplifiers
  • Embedded analog-to-digital convertors
  • Inputs for other commonly used sensors, including load cells, displacement transducers, thermocouples, and accelerometers. 
For more information about Micro-Measurements in New England and Upstate NY, contact AP Corp. Call them at (508) 351-6200 or visit their website at https://a-pcorp.com.

The QSO® Quick Shut-off Valve from Glycon Corporation

A better quick shut-off non-return valve for the Plastics Industry.

QSO Valve by Glycon
Injection molding applications require two important criteria from a non-return valve:

  1. Rapid material shut off for part weight consistency
  2. 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
QSO Valve by Glycon


Which Melt Pressure Sensor Is Good for My Application?

Melt Pressure Sensor Selection

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)
Melt Pressure Sensor

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


The pressure inside a plastics processing machine can usually be estimated well enough to determine a sensor's good pressure range. The typical working pressure should be within 20%-80% of the sensor's pressure range to balance accuracy and lifetime.

Melt Pressure Sensor Process Connection


For threaded connections in plastics processing, a standard has developed over time, which is the ½"-20UNF thread with a conical sealing face. There might be situations where different thread sizes or a flange connection is required. There are numerous options available from manufacturers, such as Dynisco, to satisfy customer needs regarding the process connection.

Melt Pressure Sensor Electrical Output


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

Melt Pressure Sensor Capillary

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

For assistance in selecting or applying any plastics molding equipment, contact AP Corp. by calling (508) 351-6200 or visit their website at https://a-pcorp.com.

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

Easyheat Induction Heaters
EASYHEAT advanced induction heating systems by Ambrell Corporation provide a flameless, non-contact, reliable, compact solution for heating your parts with a quick, clean source of heat. Available in models from 500 Watt to 10 kW, all are ideal for repeatable, energy-focused heating of your parts.

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.