Laboratory

Press Leaders

Bench Top ASTM Presses for Lab Application from Carver, Inc.

ASTM Presses for Testing Specimens of Plastics, Elastomers, Rubber Samples and other Thermoplastic Materials

ASTM Presses for plastic molding.
Auto ASTM Plastic Molding Catalog #4393-ASTM & 4394-ASTM AutoFour/15NE-ASTM & AutoFour/30NE-ASTM
ASTM Presses for rubber molding.
Auto ASTM Rubber Molding Catalog #5370-ASTM AutoFour/4819-NE-ASTM

These Carver “Auto-Four” presses are four post design with bolsters for maximum rigidity. Integral hydraulic power unit is completely self-contained and electrically operated. Fully programmable controls direct press functions and provide for recipe storage. Clamp area is fully guarded with interlocked operator gate.

Chart Recorders for data acquisition are available for any of these three AutoFour ASTM Models. Chase Frame molds for pressing test plaques, Floor Stands and Chillers for controlled water cooling are available for the Plastic Model ASTM Presses (4393 & 4394).

If your application requires multiple daylights or other specific specifications, please feel free to contact factory for more information and/or a quotation to meet your specifications.

Specifications of the Bench Top Auto ASTM Plastic Molding Models AutoFour/15NE-ASTM (4393) and AutoFour/30NE-ASTM (4394)

  • Clamping force between the 2 models 15 or 30 (minimum 1,000 lbs)
  • Adjustable Daylight 0" – 13.5" (Factory set at 4 ½”)
  • Stroke 6”
  • Four 4) fully threaded columns
  • Self-contained 1/4 HP hydraulic unit
  • (2) 12” x 12” electrically heated cored for cooling, Temperature range up to 343ºC (sized for 8 ºC/minute temperature rise, Platen & perimeter insulation, Programmed platen cooling per ASTM D-4703 Procedure C (formerly D1928 procedure C), Package includes platens designed for flood cooling, inlet and outlet manifolds and valves for platens, programmable temperature controllers with ramp capability, One digital temperature controller per platen
  • Programmable control system; 2 Programmable segments of clamp pressure, cure time and temperature per recipe, 10 recipe storage capability, Programmable in units of Kg, US Tons, Metric Tons & Pounds
  • Two "anti-tie-down" close buttons for operator safety
  • Interlocked safety enclosure with hinged door
  • 230V 1-Ph supply voltage
  • Electrical disconnect (non-fused)
  • Dimensions: 46.5”L-R x 27.5”F-B x 61”H (uncrated)
  • Weight: 1,050 pounds (uncrated)
ASTM International Organizational Member

The following calibrations and certifications are provided with the press: Pressure calibration and certification traceable to NIST (10 point check), Calibration of platen temperature controls (10 point check), Temperature uniformity of platens, Platen parallelism, Certification of timers in PLC

The ASTM Catalog#’s 4393 and 4394 meet the more demanding requirements for molding test plaques in Class 5 polyethylene materials with “Auto-Four” bench top hydraulic compression presses, 15 or 30 tons clamp force. ASTM D4703 (formerly D1928) Procedure C demands accurate and controlled cooling from 180°C to 45°C. The “Auto-Four” presses have electrically heated 12” x 12” platens which are designed for automatic cooling.

  • Water Requirements: 8 – 10 GPM (approximate) at 50 psi and 8 – 13 deg C
  • Compressed Air Requirements: 0.5 SCFM at 80 psi (Required for platen cooling only)

NOTE: Pressure step-down will relax the force to "0" and rebound to the next lower force setpoint. To run material class 1 thru 4 requires a constant water supply of 13 deg. C (55 deg. F.) To run class 5 material, a constant water supply of 8 deg. C (45 deg. F) is necessary.  Water and air cooled chillers for providing the proper process water are available as an option.

Specifications of the ASTM Rubber Molding Press Model AutoFour/48-19-ASTM (5370):

  • Clamping force 48 tons (minimum 1,000 lbs)
  • Adjustable Daylight opening 4" – 15"
  • Shut daylight 0” – 11”
  • Stroke 4”
  • Four (4) columns
  • Compatible with ASTM D3182 for preparation rubber test slabs
  • Self-contained 1/4 HP hydraulic unit
  • (2) 19” x 19” electrically heated platens, Temperature range up to 500ºF or 260ºC. All heat controls thru PLC with selectable auto reheat
  • Programmable control system; Full touch screen interface, 20 Programmable setpoints of clamp force, cure time and temperature per recipe, 10 recipe storage capability, Programmable in force units of Kg, US Tons, Metric Tons & Pounds, Programmable in temperature units of degree F or C, Automatic bump sequence (can be programmed in any of all segments), Either force or temperature mode can be chosen per segment.
  • Two "anti-tie-down" close buttons for operator safety
  • Interlocked safety enclosure with hinged door
  • 230V 1-Ph supply voltage
  • Electrical disconnect (non-fused)
  • Design includes wrap around Floor Stand
  • Dimensions: 61”L-R x 47”F-B x 71” H (uncrated)
  • Weight: 3,500 pounds (uncrated)
ASTM International Organizational Member

The following calibrations and certifications are provided with the press: Pressure calibration and certification traceable to NIST (10 point check), Calibration of platen temperature controls (10 point check), Temperature uniformity of platens, Platen parallelism, Certification of timers in PLC

ASTM Chase Frame Kits
Includes Two Aluminum Back-up Plates and 50 Mylar Sheets
Description (Sample size)
Catalog Number
100 Mylar Sheets (separate purchase)
Teflon Coated SteelStainless SteelBrass
4" x 4" x 1/8" 4079 4080 4081 4161
6" x 6"x 1/8" 4082 4083 4084 4162
8" x 8"x 1/8" 4085 4086 4087 4163