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Adjustable Center Crosshead Assemblies

Adjustable center crosshead assemblies provide three critical functions:
die adjustment, flow distribution and tip adjustment. B&H manufactures
a wide range of high-precision adjustable center crossheads for a variety
of industrial applications.

Our commitment is to partner with your engineering staff in the selection
of adjustable center crosshead assemblies and related tooling that will
meet your production goals. And to make things easiest, B&H Tool
now offers its Operations Manual for Adjustable Center Crossheads
in 3 languages:
English, Spanish and Chinese.

Features of B&H adjustable center crosshead assemblies include:

  • Axial, rotational tip adjustment while extruding
  • Simple design with minimal parts
  • Positive leak-free sealing
  • Multiple options for flow distribution

Benefits include:

  • Ability to extrude high and low temperature
    thermoplastics and fluoropolymers
  • Balanced laminar flow
  • Reduced material degradation
  • Optimized dimensional stability
  • Less scrap
  • Reduced down-time
  • Outstanding end-product quality

Optimizing Flow Distribution for Adjustable Crosshead Assemblies

The exceptional design characteristics of B&H deflectors optimize laminar
flow and concentricity, and assure outstanding crosshead performance.
We offer 3 major types of deflectors: high-volume, low-volume and,
for BH30 and larger, spiral deflectors.

B&H spiral deflector technology was developed to create transverse
orientation of the plastic inside the crossheads. The result is increased
burst pressure and the elimination of knit lines.

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Spiral Retrofit

We make it easy to retrofit your existing B&H crossheads and get the
advantages of advanced spiral deflection. With this simple upgrade,
you can continue to use your existing tooling. Our Spiral Deflector
Upgrade Kit includes a deflector, barrel body, core tube, wedge ring,
and a body heater customized to the crosshead.

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Maintaining Temperature Consistency

All B&H adjustable center crosshead assemblies come with custom
heaters and thermocouples. This provides a highly consistent heat
profile on extruded material, and prevents crystallizing, material
degradation, residual deposits, and defects.

Sizes and Materials

B&H makes 9 sizes of adjustable center crosshead assemblies,
with maximum die I.D. from 1/4” to 5-1/2”. Maximum core O.D.
ranges from 7/64” to 4”.

For low temperature applications, we use 420 Stainless Steel,
heat-treated to RC52. For high temperature applications,
our engineers specify nickel alloys, including C-276 Hastelloy,
and Inconel 718.

To determine the best crosshead size for your application,
use our Crosshead Sizing Chart.

 

Use a Quote Request Worksheet to get a quick and accurate quote.

We’ll recommend a solution, and design an adaptor along with an
appropriate tool set. We’ll also suggest proven strategies to help you
maintain your new assembly and maximize its extrusion performance
and service life. For example, our customized disassembly tools make
your change-overs lightning fast and damage-free.

Plastic Extrusion Tooling