When we consider the general production process (melting-mixing-cooling), in a very simple approach, all added paints, additives and fillers must be properly mixed in the plastic matrix. Almost all additives used herein are micron or submicron scale particles. Obtaining a perfect mix naturally depends on the efficiency of the mixing process used. In this activity, it is measured by the performance of the resulting product. Mixing mechanisms; What we call Distributive (homogenization), Dispersive (dispersion, removal), Distributive mixing means the most appropriate mixing of the participants among each other. Dispersive mixing means that the particles used in the mixture are removed from each other. From this point of view, the more homogeneously mixed with other additives by removing all the additive particles from each other, the more perfect mixture or in other words masterbatch we will prepare.

 

As a step forward, closed mixers were used. These are based on the principle of transferring the mixed materials to the chamber with the help of a feeding system and mixing until a homogeneous mixture is obtained in this closed chamber. After mixing, the bulk material is discharged and transferred to the next process, shaping, or more precisely, to the granule process. In these systems, the structure of the mixing system is fixed and its efficiency changes when the formula changes.

 

Today, single or twin screw extruder systems are used, which can be configured depending on the formula. Although both systems are different in terms of working principles, they are also used efficiently depending on the type of application.


General Parts

It consists of raw material feeding hopper, extruder driven motor, gear reducer box, screw and barrel, heaters, cooling fan form molds, hopper and control cabinet.

 

 

Working Principle

The raw material is melted from the chamber and taken out of the mold in the desired form at the end with the pressure support in the extruder and drawn in the desired dimensions. The product is drawn under constant temperature to ensure the continuity of the form in a stable state.

 

 

What is a Melt Pressure Sensor?

Melt Pressure Sensor is an instrument used to measure the pressure and temperature of melted liquids (optional) in processes where plastic raw materials can reach high temperatures.


Why is a Melt Pressure Sensor Necessary?

Almost all extruders use at least one melt pressure transducer because it is desirable for melt pressure/temperature control to improve the quality of the extrusion process.

Safety

Equipment Protection

Higher Efficiency

Higher Product Quality

 

 

Melt Pressure Sensor Applications for Petrochemical Extruder Processes

Melt Pressure Sensor in Mold / Melt Pressure Control Application

Pre-Filter Melt Pressure Sensor / Melt Pressure Control Application

Post Filter Melt Pressure Sensor / Melt Pressure Control Application

Melt-Gear Pump Pre-Melt Pressure / Melt Pressure Control Sensor Application

Melt-Gear Pump Post Melt Pressure Sensor / Melt Pressure Control Application


Aim:

* Checking the melt pressure, flow stability,

* To ensure the formation of the necessary pressure for production,

* Monitoring for possible contamination that could clog the filter changer and cause pressure drop in the mold, and as a result to determine if clogged filters need to be replaced (therefore the pressure is measured before and after the screen changer)

* The gear pump is used to give a constant flow rate to the mold: the flow is adjusted based on the measured pressure value (the pressure value is used to give feedback to the driver for screw speed adjustment)

* Creating necessary prescriptions for production,

* Evaluation of plastic raw materials,

* Controlling Pressure,

* Preventing excessive pressure on the screw,

* Protecting screw wear,