Miniature Injection Molding Machine Model 55
Reciprocating Screw Plastized Injection Unit
The Mini-Jector Model 55 series—including the 55, 55E, and 55P—are compact, hydraulic mini injection molding machines designed for polymer test labs, universities, and prototyping applications. Featuring a reciprocating screw for even heat dispersion and precise control via Siemens PLC and HMI, these machines ensure consistent results for polymers with narrow heat ranges and are ideal for color mixing and dye testing. The advanced Model 55P adds a linear potentiometer for enhanced pressure control throughout the mold cavity.
Download a digital copy of our MINIJECTOR Product Brochure that features valuable information on our MODEL55 machines.
What Can The MINIJECTOR Model 55’s Do?
Thermoplastic
Prototyping
Small.
Complex plastic parts
Polymer lab & research lab testing
Universities & Technical Schools Testing
How Our Injection Molding Machines Work
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.
Download Our Brochure
Download a digital copy of our MINIJECTOR product brochure that features valuable information on our MODEL45, MODEL50, MODEL55, and MODEL70 products. Product specifications include:
- Model Differences
- Clamping Pressure
- Maximum Mold Size
- Injection Pressure
- Power Requirements
- Production Dimensions
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
Let’s Talk
Speak with an Electro-Matic Mini Injection Molding expert regarding your application.