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Negri Bossi
Custom Design Screws

Custom Design Screws - Any Material/Any Application


Specialized Custom Design for Any Application and Any Material

Selecting the right screw for your application can be a challenging and time consuming endeavor.  The PS&E Design Team makes it easy.  Our Engineering and Design Teams have a combined 150+ years of hands-on experience in solving simple to complex molding problems. Although every molding project has unique variables, chances are that our engineers have solved similar issues in the past.

Whether you are looking to speed up cycle times, increase melt quality and consistency, achieve a more homogenous melt, or enhance material quality by reducing over shearing or long residence times, PS&E can provide a custom design screw to solve even the most difficult problems. 


Our Commitment
Nothing is more important than getting it right the first time.  That's why our Design Team will do whatever it takes to custom design the best screw, barrel, or complete injection unit to match your specific application. We take pride in the ability to make any screw. Our experienced Design Team is dedicated to providing exceptional design and technical support to keep your molding operations running efficiently.  When you need assistance, we're here to make your job easier.  Let us know your specific needs and we can custom design a screw to fit your specific application.  For quicker response, use the quickQuote link below.


Quality Craftsmanship
All PS&E custom design screws are manufactured from the highest-quality materials to withstand the stringent demands your operations require. Our screws represent the finest workmanship in the industry.  Each custom designed screw is precisely manufactured to your specifications using the latest technology and quality inspected to ensure optimum performance.  We inspect every screw for accurate gauging of all dimensions and evaluate the screw's appearance and performance requirements by performing quality checks to verify:

  •  Material Composition
  • Hardness Testing
  • Mechanical Dimensions
  • Straightness
  • Welding
  • Surface Finish


Production Capabilities
We can manufacture any screw from 1/2" (12mm) to 10" (254mm) ID up to 25' in length.
Our screws are available in a variety of tool steels to meet your specific requirements.

BASE MATERIALS

  • 4140 Alloy Steel

  • Nitralloy 135m

  • H-113 Tool Steel

  • D-2 Tool Steel

  • CPM - 9V

  • CPM - 10V

  • CPM - 420V

  • 17-4 Stainless

  • Cru-Wear

  • Other choice tool steels

FLITE HARD FACINGS

  • Stellite #6

  • Stellite #12

  • Colmonoy #56

  • Colmonoy #57

  • Colmonoy #83

  • Colmonoy #88

SURFACE HARDENINGS

  • Nitriding

  • D-Gun

  • Industrial Hard Chrome Plating

  • Carbide Encapsulating

  • Titanium Nitriding

  • Armoloy


Plastic Materials
Custom Design Screws are available for use with the following materials.

ABBREV

  POLYMER
ABS acrylonitrile-butadiene-styrene
ASA acrylate-styrene-acrylonitrile
ATH aluminum trihydrate
BDS butadiene-styrene block copolymer
BMC bulk molding compound
BOPP biaxially oriented polypropylene
BR butadiene rubber
CA cellulose acetate
CAB cellulose acetate-butyrate
CAP cellulose acetate propionate
CE cellulose
CMC carboxymethyl cellulose
CN cellulose nitrate
CP cellulose propionate
CSM chlorosulphonated polyethylene
DMC dough molding compound
TPX polymethyl pentene copolymer
UHMWPE ultra high molecular weight PE
VCM vinyl chloride monomer
ECTFE ethylene chlorotrifluoro ethylene
EPDM ethylene-propylene-diene monomer
EPM ethylene-propylene rubber
EPR ethylene-propylene rubber

ABBREV

  POLYMER
EPS expanded polystyrene
EVOH ethylene vinyl acetate
FEP fluorinated ethylene-propylene
FRP fibre reinforced polyester/plastics
GMT glass mat thermoplastic
GPPS general purpose polystyrene
GRP glass reinforced plastic
HDPE high density polyethylene
HEMA hydroxyethyl metharcylate polymer
HIPS high impact polystyrene 
LCP liquid crystal polymer
LDPE low density polyethylene
LLDPE linear low density polyethylene
MBS methacrylate-butadiene-styrene 
MDPE medium, density polyethylene
MF melamine formaldehyde
NBR acrylonitrile butadiene rubber
OPP oriented polypropylene
PA polyamide = nylon
PAA polaryl amide
PA 6 nylon 6
PA 66 nylon 66
PA 46 nylon 46

 

ABBREV

  POLYMER
PA610 nylon 610
PA66/610 nylon 66/610 copolymer
PA11 nylon 11
PA12 nylon 12
PAI polyamide imide
PAN polyacrylonitrile
PB polybutylene
PBT polybutylene terephthalate
PC polycarbonate
PE polyethylene
PEBA polyether block amide
PEEK polyetheretherketone
PEEL polyester elastomer
PEI polyester imide
PEK polyetherketone
PES polyether sulphone
PETP polyethylene terephthalate
PETG PET copolymer
PF phenol formaldehyde
PFA perfluoro alkocyl alkane
PHB polyhydroxbutyrate
PI polyimide
PIR polyisocyanurate rigid (foam)
ABBREV   POLYMER
PMMA polymethyl methacrylate
PMP polymethyl pentene
POM polyoxymethylene
PP polypropylene
PPE polypropylene ether
PPO polypropylene sulphide
PPSS polypropylene sulphide sulphone
PS polystyrene
PSU polysulphone
PTFE polytetrafluoroethylene
PTMT polytetramethylene terephthalate
PUR polyurethane
PVA polyvinyl acetate
PVB polyvinyl butytral
PVC polyvinyl chloride
PVCC chlorinated polyvinyl chloride
PVCP polyvinyl chloride plasticized
PVCU polyvinyl chloride unplasticized
PVDC polyvinylidene chloride
ABBREV   POLYMER
PVDF polyvinylidene fluoride
PVF polyvinylfluoride
PVOH polyvinyl alcohol
SAN styrene acrylonitrile
SRB styrene-butadiene-styrene
SEBS styrene-ethylene-butadiene-styrene
SIS styrene-isoprene-styrene
SMA styrene maleic anhyride
SMC sheet molding compound
SRP self reinforcing polymer
TPE thermoplastic elastomer
TPO thermoplastic olefin 
TPR thermoplastic rubber
TPS toughened polystyrene
TPU thermoplastic polyurethane (rubber)
TPUR thermoplastic polyurethane (rubber)
UF urea formaldehyde
VC vinyl chloride
XLPE cross-linked polyethylene

 


Our Guarantee
PS&E guarantees our barrels and screws to be free of defective materials and workmanship for 90 days (industry standard).
We also offer extended life warranties on same materials.


Plastication Components
In addition to Custom Design Screws and Barrels, we also offer Custom Design Screw Tip Assemblies, Nozzle Tips, End Caps, and Tie Bars.  PS&E provides all of the products you need to make your molding processes run efficiently and cost effectively.  Click the link below to view the complete PS&E Product Index.

Your Next Barrel or Screw Is On Our Shelf...
Call Today! 800-627-1033

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