Plastic Material Containers

Product Descriptions

Plastic Raw Material Containers

Mobile, Stationary, and Modular Storage Solutions for Plastic Granules and Crushed Materials

In plastic production facilities, storing raw materials in a clean, organized manner and close to production machinery is crucial for process safety, material traceability, and production continuity. Incorrect raw material use, granule contamination, or failure to deliver materials to production machinery on time can lead to serious quality problems and unplanned downtime.

Plastic raw material containers are designed for the storage, transportation, mixing, and transfer of plastic granules, masterbatch, additives, regranules, and crushed materials to central raw material feeding systems.

The product family, with volume options ranging from approximately 60 to 4,800 liters, covers a wide range of applications, from holding small quantities of raw materials next to machinery to large-volume daily storage and central intermediate hoppers.

Depending on the intended use, the following solutions can be offered:

* Wheeled raw material containers
* Bag unloading hoppers
* Daily raw material storage tanks
* Centralized system intermediate hoppers
* Masterbatch containers

* Rotary valve top buffer hoppers
* Mobile mixing containers
* Stackable containers
* Application-specific storage hoppers

Clean and Safe Storage of Plastic Raw Materials

Container systems help protect plastic raw materials from dust, dirt, and foreign matter that may originate from the external environment. Models where the parts in contact with the product are made of stainless steel provide an advantage in production environments where color and material changes are frequent, thanks to their easy-to-clean surfaces.

Thanks to their modular product structure, containers can be configured specifically for the application with suction boxes, suction pipes, level sensors, lid locking systems, adapter plates, filter bags, wheels, and forklift transport skids.

Container Models

CR.A1 Wheeled Plastic Granule Containers

The CR.A1 series is specifically designed for storing granules, discharged from standard 25 kg bags, alongside machinery in plastic injection molding plants.

The product range includes 60, 120, and 240-liter capacity options:

* 60-liter container: approximately 1 bag

* 120-liter container: approximately 3 bags

* 240-liter container: approximately 6 bags

Thanks to its compact and mobile design, raw materials can be easily transported to different machines in the production area. Four lockable swivel wheels help securely fix the container during use.

CR.A1 Series Features

* Stainless steel body
* 60, 120 and 240 liter volume options
* Product suction from the bottom of the hopper
* Use with single or double-walled suction tubes
* Transparent lid allows visibility of material level and color
* Easy-to-clean design
* Four braked swivel wheels
* Lid attachable to the side of the container
* Optional material card holder
* Stainless steel or transparent folding lid options
* Optional protective grille

The transparent lid allows the operator to quickly check the quantity and color of the material inside the container. This feature helps reduce the risk of using the wrong material in injection molding plants where different colors and resins are used.

CR.B1, CR.B2 and CR.B3 Wheeled Containers

CR.B series wheeled containers are designed for plastics processing applications requiring higher capacity and more accessory options.

The modular system, available in 120, 215, 300, 400, and 500-liter volume options, can be adapted to many raw material storage applications in plastic injection, extrusion, and compounding plants.

The containers are suitable for emptying standard 25 kg bags. However, they can also be automatically filled using a vacuum loader mounted on the top cover. Application-specific adapter plates can be used to connect different brands of vacuum loaders to the system.

CR.B1 Series

CR.B1 is a low-chassis standard wheeled container solution. It allows the granules to be transferred from the suction box under the container to a vacuum conveying line.

CR.B2 Series

CR.B2 models have a higher ground clearance. This structure allows the material to be discharged by free flow into another hopper under the container or to use multiple suction points.

Four separate suction points can be created by connecting two suction boxes one below the other to the outlet. This allows raw materials to be sent from a single container to multiple production machines.

CR.B3 Series

The CR.B3 series is designed for production facilities where incorrect raw material filling or unintentional mixing of materials must be prevented.

Standard equipment includes:

* Electromechanical lid lock
* Integrated minimum level sensor
* Red warning light
* Pre-wired 10-pin connector
* Stainless steel protective grille

The lid locking system is designed for production processes.
It can prevent the container from opening unless permitted by the processing or material verification system. This provides additional process safety against the use of incorrect granules, incorrect colors, or incorrect masterbatch.

General Advantages of the CR.B Series

* Stainless steel surfaces in contact with the product
* Capacity options between 120-500 liters
* Robust and long-lasting construction
* Two fixed and two lockable swivel wheels
* Material transfer from the suction box under the hopper
* Easy waste emptying
* Easy cleaning
* Single or double-walled suction pipe options
* Compatibility with conveyor pipe diameters of 30-76.1 mm
* Automatic filling option with vacuum loader
* Optional electromechanical lid lock
* Optional material card holder

CR.C1 Stainless Steel Intermediate Containers

The CR.C1 series is used in plastic production plants as a daily raw material storage or buffer container. It ensures the centralized storage of granular and crushed material and its uninterrupted delivery to production machines.

The hopper can be filled with a vacuum loader mounted on top or with a cyclone separator for material from a crushing machine. Vacuum loaders from different manufacturers of central raw material handling systems can be connected with suitable adapter plates.

CR.C1 Series Features

* Stainless steel surfaces in contact with the product
* Volume options between 595-1,645 liters
* Suitable for storing plastic granules and crushed materials
* Filling with a vacuum loader or cyclone separator
* Maximum and minimum level sensor connections
* Filter bag for venting air generated during filling
* 60° or 90° conical outlet option
* Sight window on the body
* Robust construction suitable for long-term use
* Possibility of later capacity expansion
* Options for one, two or four suction points

A 90° outlet hopper can be used for free-flowing plastic granules. A 60° conical outlet option is recommended for safer unloading of crushed material.

suction boxes, connected to the bottom of containers, can be used with raw material conveying pipes between 38-76.1 mm. Raw material transfer can be achieved from a single chamber to up to four different lines.

CR.ZRS Rotary Valve Top Intermediate Chambers

The CR.ZRS series is designed for use in pneumatic pressure conveying systems. It can be used as a buffer chamber on a rotary valve or as an intermediate receiving and sending chamber in long-distance conveying systems.

Raw material is loaded into the container via a vacuum loader or cyclone separator. A rotary valve with DN150, DN200 or DN250 connection can be used under the chamber.

CR.ZRS Series Features

* Stainless steel product contact surfaces
* Suitable for storing granular and crushed materials
* 595, 675, 1,080 and 1,160 liter volume options
* 60° or 90° outlet geometry
* DN150, DN200 and DN250 rotary valve connections
* Filling with vacuum loader or cyclone separator
* Maximum and minimum level sensor connections
* Design ready for leakage air return line
* ​​Sight window on the body
* Filter bag connections on the roof
* Possibility of later volume expansion

CR.ZRS intermediate containers are suitable for central plastic raw material conveying systems, compounding lines, crushed material transfer and long-distance pressurized conveying applications.

CR.MIX Mobile Mixing Containers

The CR.MIX series is designed for the rapid and homogeneous mixing of non-abrasive and free-flowing plastic granules or crushed materials.

The conical mixing screw with its special geometry helps to achieve a homogeneous material distribution in a short time. The container and mixing screw are made of stainless steel.

Thanks to its mobile chassis and CEE electrical connection, CR.MIX can be used alongside different machines in the production facility.

CR.MIX Series Features

* 300 and 500 liter total volume options
* 160 and 350 liter usable mixing volume
* Stainless steel container and mixing auger
* Easy-to-clean conical auger design
* Short mixing time
* Adjustable mixing time
* Automatic stop at the end of mixing
* Transparent cover for monitoring the process
* Two suction connections at the bottom of the hopper
* Residual material discharge outlet
* Two fixed and two lockable wheels
* CEE connection suitable for mobile use
* Electromechanical operator safety system
* 40, 50 or 60.3 mm suction pipe options

CR.MIX containers can be used in the following applications:

* Mixing plastic granules with masterbatch
* Homogenization of different granule batches
* Mixing regranules and original raw materials
* Reuse of crushed material
* Small and medium-scale recipe preparation
* Raw material pre-mixing next to the machine

CE.A1 Bag Discharge and Daily Raw Material Containers

CE.A1 series; Depending on its use and capacity, the bag unloading hopper can be used as a daily silo, material bunker, or central raw material storage facility.

It has a wide capacity range between 300-4,800 liters. Each container
The container can be manufactured in both aluminum and stainless steel.

Standard 25 kg bags can be emptied into the hopper via the folding lid. Alternatively, automatic filling can be achieved with a vacuum loader connected to the top section.

CE.A1 Series Features

* 300-4,800 liter volume options
* Aluminum or stainless steel body
* Folding lid with soft-closing feature
* Stainless steel protective grille option
* Adapter plate for vacuum loader connection
* Minimum level sensor connection
* Maximum level sensor connection in larger models
* Inspection and cleaning opening in larger models
* 90° conical outlet
* Suction boxes suitable for 38-84 mm raw material conveying pipes
* Height-adjustable feet up to 750 liters
* Wheel or forklift skid option up to 750 liters
* Optional electromechanical lid lock

The electromechanical lid lock can be used in conjunction with a barcode or recipe verification system. Preventing the lid from opening without verifying the correct raw material helps prevent incorrect material filling.

CE.S1 Stackable Containers

The CE.S1 series consists of aluminum stackable containers that enable efficient use of space in production facilities and warehouses.

Available in 750, 1,000, 1,500, and 2,000-liter volume options, these containers can be transported by forklift after filling and stacked on top of each other.

Material in the upper container can be transferred to the lower container via free fall. A total storage volume of up to 4,000 liters can be created in a container tower.

CE.S1 Series Features

* Aluminum container body
* Volume options from 750-2,000 liters
* Robust support frame
* Safe forklift transport
* Stackable design
* Maximum 4,000 liter container tower
* Foldable lid with stopper
* Free fall or vacuum filling
* Two separate suction points
* Minimum level sensor option
* Waste discharge hatch at the bottom outlet
* Optional stainless steel grate
* Options for suction tubes in different diameters

CE.S1 containers are particularly suitable for transporting granular or crushed materials between production and storage in plastic injection, extrusion, compounding, and recycling plants.

Application-Specific Container Designs

In projects where standard products do not meet process requirements, application-specific containers can be designed.

Special containers can be manufactured with the following options:

* Aluminum or stainless steel body
* Round or square design
* DIN standard or custom outlet flanges
* Level sensor connections
* Humidity, temperature, pressure, and vacuum sensor connections
* Electromechanical lid locking systems
* Barcode or RFID-based material verification
* Forklift transport skids
* Wheeled chassis for mobile use
* Vacuum or pressure filling
* Cyclone separator connection
* Outlet geometry suitable for different unloading systems
* Special conical structure for low-viscosity raw materials

The general layout drawing prepared before production can be evaluated in PDF or STEP format to check the container's compatibility with existing production equipment.

Advantages of Container Systems

* Product design specifically for the plastics industry
* Wide capacity range from approximately 60-4,800 liters
* Aluminum and stainless steel options
* Mobile, stationary, and stackable models
* Easy-to-clean construction
* Compatibility with central raw material handling systems
* Suitable for granular, regranular, and crushed materials
* Suction equipment suitable for different conveyor pipe diameters
* Filling options with vacuum loaders and cyclone separators
* Maximum and minimum level control
* Lid locks to help prevent incorrect raw material filling
* Material feeding from one container to multiple production machines
* Modular accessory system

* Process-specific production possibility
* Robust and long-lasting industrial structure

Application Areas

Container systems can be used in the following production areas:

* Plastic injection molding plants
* Extrusion lines
* Plastic compound production
* Masterbatch production
* Plastic recycling plants
* Film, sheet, pipe, and profile production
* Blow molding and packaging production
* PET processing plants
* Technical plastics production
* Central raw material handling Systems
* Granule storage next to the machine
* ​​Crushed material collection and reuse systems

# Container Selection Suitable for Your Project

To determine the correct container model, not only the storage volume but also the characteristics of the raw material and the production process must be evaluated.

The following information should be considered during project planning:

* Type of raw material to be used
* Bulk density of granular or crushed material
* Required storage capacity
* Daily raw material consumption
* Whether the container is mobile or stationary
* Filling method
* Raw material conveying pipe diameter
* Number of suction points required
* Use of vacuum or pressure conveying
* Need for level control
* Material verification and lid locking requirement
* Dimensions of the area where the container will be placed

Polmak Plastic, containers suitable for your production process
It provides technical support for selecting the appropriate model, determining accessories, and integrating the container into the existing central raw material transport system.