SB1341-16-RQ-0686_SOW.pdf

Statement of Work

Twin Screw Extruder

Specification

Contractor shall provide a Mini‐twin screw extruder that meets or exceeds the following specifications:

Mini‐Twin Screw Extruder:

Benchtop unit

Capable of compounding thermoplastic polymers

Barrel bore diameter 11mm or less

Split extruder barrel with removable top half barrel

Material of construction: Nitriding steel

Barrel length 40L/D or greater

Barrel Zones 7 heating zones

Height 41cm or less

Length 82cm or less

Max. Screw speed 1000 RPM or greater

Max. temperature 350 C or greater

Screws: Fully segmented, co‐rotating

Torque per shaft 6Nm or greater

Minimum Output 20g/hr or greater

Maximum Output 2.5 Kg/h or greater

Pressure transducer

Melt temperature transducer

Atmospheric venting adapter

1 set of screw shafts

Capable of processing 2.5mm (or larger) pellets without use of a forcing plunger

Operation Manual

Chiller Unit, 115 V incl. Piping:

Water chiller: Sufficient to cool the feeding port to prevent pre‐melting of pellets

Fully ported top half barrel

Additional top barrel half with 6 combined feed/vent ports.

11 mm Screw Element Flexibility Kit:

Set of additional screw elements including: 6 or more feed screws, 2 or more reverse feed screws, 16 or more mixing elements (including 0 and 90 degree elements)

High volume Feed Screw Kit:

High volume Feed Screw: Asymmetric feed screws to allow up to 4mm (or greater) pellets into extruder

Volumetric Single Screw Feeder

Volumetric Single Screw Feeder: to feed powder or pellets (up to 2.5mm) into the main feed port.

Volumetric mini Twin Feeder with agitator:

Suitable for powders and micro pellets (max. size 1 mm).

Twin screw feeder with agitator

Cylindrical hopper (0.6 l volume) closed by lid

Horizontal outlet tube

Feed funnel extension with lid

Feeder Single Screw: capable of feeding powder:

Diameter: 12 mm or less

Helix pitch: 8 mm or less

Core: 6 mm or less

Feeder Single crew: capable of feeding powder and pellets (up to 4mm)

Diameter: 12 mm or less

Helix pitch: 16 mm or less

Core: 4 mm or less

Set Concave Screw

Outer diameter: 12 mm

Pitch: 12 mm

Inner diameter: 8 mm

Secondary Feed Funnel:

To allow feeding of solids into a downstream feed port

Dual Feeding Funnel Extension

To use two feeders feeding into the same feeding port

Set of die inserts:

diameters: 0.5 1.0 1.5, 2.0 mm, 2.5 and 3.0 mm

Mini Conveyor Belt

Belt width: 30 mm

Belt length: 500 mm

Belt material: Silicone rubber

Belt speed: 0.06 … 2 m/min

Fixing roll for Mini conveyer belt

Assures a continuously transport of extruded sample material

Screw Configuration Software

To aid in configuring screws. Provides software visualization of barrel and screws. Includes interactive setup in 3D view and generates formatted drawing of setup

Data Logging Software Part Number

Data logging software, for use on NIST supplied computer, to allow data‐logging of all data downloaded from control system.

Signals logged:

‐Extruder speed (rpm)

‐Extruder torque (%)

‐Barrel, die temperatures (°C)

‐Melt temperature (°C)

‐Pressure (bar)

‐Feeder rate (%, kg/h)

Delivery

The contractor shall delivery the item not later than 75 days after award.

The item shall be delivered FOB Destination Shipping Terms to:

The National Institute of Standards and Technology

100 Bureau Drive

Gaithersburg, MD 20899

Installation and Training:

The contractor shall install the equipment not later than 30 days after delivery.

The contractor shall provide training for 3 NIST employees after installation on the assembly and operation of the system.

Acceptance Criteria

Upon installation, the contractor shall perform the following

Visual inspection of the delivered units and parts for damages.

Demonstration of the instruments ability to utilize typical polymer pellets and powders, and melt, mix, extrude and convey them.

Demonstration of the instruments ability to provide data for data logging on user supplied computer.

Demonstration of the screw extruder software to aid in screw design on user supplied computer.

The demonstration of the above may occur during training. Final acceptance by the Government will be given after successful delivery, installation, training and demonstration of instrumentation specifications.

Warranty:

The Contractor shall provide, at a minimum, a one year warranty for the equipment. The warranty shall cover all parts, labor and travel. The warranty shall commence upon successful completion of delivery, installation, training and demonstration of all required specifications.

GENERAL INFORMATION

Safety: The Contractor employee shall be responsible for knowing and complying with NIST installation safety prevention regulations (http://www‐i.nist.gov/mml/safety/policies/index.htm.) Such regulations include, but are not limited to, general safety, fire prevention, and waste disposal.

Security: NIST is a restricted campus. An identification badge is required for access for entry into buildings and also is shown to the armed Security Police when entering the campus.