Model 55

Reciprocating Screw Vertical Injection Molding Machines

Mini-Jector models 55, 55E and 55P are self-contained, hydraulic mini injection molding machines ideal for polymer test labs, universities, and other material testing or prototype applications. This reciprocating screw injection molding machine uses stirring and compression action to create more even heat dispersion through the plastic, so it is suitable for polymers with a narrow heat range. It can also be used for testing dyes and mixing colors with more uniformity.

The standard Model 55 uses Siemens PLC and HMI to provide detailed yet intuitive control over the machine operation. The Model 55P is a reciprocating screw injection molding machine with an additional linear potentiometer to control pressure variations through the mold cavity.

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What Can the Models 55 Do?

Thermoplastic Prototyping

Small, Complex Plastic Parts

Polymer lab and Research lab testing

Universities & Technical Schools testing

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How Our Injection Molding Machine Works

Mini-Jector machines use mechanical advantage to generate a substantial clamping force (up to 18 tons with the Model 55) using only a small amount of inputted effort. This force is maintained through the injection cycle.

The Mini-Jector Model 55 uses direction control valves with plug-in connectors to control the screw speed, injection pressure, injection speed and more. This, with the optional linear potentiometer in the Model 55P, gives you exceptional flexibility with materials and design.

Based on these and other innovative design elements, the Mini-Jector can produce injection molded parts at a significantly lower cost than larger machines.

Want to speed up time to market or reduce risk involved with expensive injection molding tooling?

Model 55

  • Requires at least 220 volt power
  • Shot sizes of 1, 2, & 4 ounces.
  • 12 tons or 18 tons clamp force
  • Control of three heat zones
  • Manual (hydraulic valve) adjustment for speed and pressure control.

Model 55E

  • 230V single and three phase phase power options
  • 7/8” diameter reciprocating screw with 2.5:1 ratio and flame hardened flights
  • Nitralloy screw barrel
  • Sliding ring shut off tip with non-drool nozzle
  • Drive screw powered by Siemens Servo with 25:1 Gearbox
  • Twin injection screws powered by Siemens Servo with 15:1 Gearbox
  • Carriage screw powered by Siemens Servo with 81:1 Gearbox

Model 55P

  • 230V single and three phase phase power options
  • 7/8” diameter reciprocating screw with 2.5:1 ratio and flame hardened flights
  • Nitralloy screw barrel
  • Sliding ring shut off tip with non-drool nozzle
  • Drive screw powered by Siemens Servo with 25:1 Gearbox
  • Twin injection screws powered by Siemens Servo with 15:1 Gearbox
  • Carriage screw powered by Siemens Servo with 81:1 Gearbox

Model 55

  • One nozzle heater
  • Two barrel heaters

Model 55E

  • One nozzle heater
  • Two barrel heaters
  • Four channel analog temperature control with solid state relay output

Model 55P

  • One nozzle heater
  • Two barrel heaters

Model 55 – Hydraulic System

  • Self contained hydraulic power unit
  • Twin injection cylinders
  • One carriage cylinder
  • 5.4 gallon reservoir
  • 1725 RPM motor with 2 HP
  • 2.0 GPM gear pump immersed in the reservoir

Model 55E – Hydraulic System

  • Self contained hydraulic power unit
  • 5.4 gallon reservoir
  • 2 HP pump motor
  • 2.0 GPM pump,
  • One (1) 2” x 6” hydraulic cylinder
  • Remote relief valve to control injection pressure
  • Solenoid operated directional valve for ram (plunger) movement

Model 55P – Hydraulic System

  • Self contained hydraulic power
  • Twin injection cylinders
  • One carriage cylinder
  • 5.4 gallon reservoir
  • 1725 RPM motor with 2 HP
  • 2.0 GPM gear pump immersed in the reservoir

Model 55

  • Aluminum material hopper with dump tube and shut-off
  • Siemens PLC/HMI controls
  • Screw back pressure read on oil filled gage
  • Manual and semi-automatic modes
  • Motor starter with thermal overloads and emergency stop button
  • Vernier adjustment for shot size
  • Selectable 1/4” decompression feature

Model 55E

  • Siemens PLC control and Color Touch Screen
  • 5 step programmable injection profile
  • Force and Temperature monitoring
  • Velocity is held within 0.02%
  • Position is held within 0.001”
  • Aluminum material hopper with shut off and dump tube
  • Integral hopper tube and bearing chiller system

Model 55P

  • Siemens PLC/HMI with recipes, packing mode and purge cycle
  • Ability to control screw speed, injection speed and screw back pressure read on oil filled gauge
  • Manual and semi-automatic modes
  • Motor starter with thermal overloads and emergency stop button
  • Selectable de-compression feature
  • Carriage speed
  • Aluminum material hopper with shut off and dump tube
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