Unfortunately, there isn’t a straightforward answer to this, as the maximum part size depends on several factors, including:

1. Part Design Geometry: Complex shapes and intricate details may require smaller overall part sizes to ensure quality and consistency during production.

2. Plastic Type: Different materials behave differently under heat and pressure, which can influence the maximum feasible part size.

3. Tool/Mold Design: The design and construction of the mold, including considerations like cavity layout and cooling efficiency, also impact the size of the part that can be reliably produced.

To help you understand the capabilities of our machines, we recommend visiting the Specs page on our website, where you can find detailed information about injection shot size and platen dimensions. These specifications define the maximum working envelope of each machine, which is the space within which the mold operates.

However, it’s important to note that the maximum working envelope does not directly translate to the maximum part size. The actual maximum part size will typically be much smaller, influenced by the factors mentioned above.

MicroMolder systems support a wide range of thermoplastics in pellet form, with capabilities depending on the machine.

MicroMolder Evo

The Evo works best with standard thermoplastics and lower-flow materials.

• Common materials: ABS, PP, PE, PS, TPU

• Usable but with significant limitations: Nylon (PA), PC, and some filled materials depending on flow characteristics

• Not ideal for: High-temperature or very low-flow engineering resins

MicroMolder+

The MicroMolder+ supports a broader range of materials, including engineering-grade plastics.

• Common materials: ABS, PP, PE, PS, TPU

• Engineering materials: Nylon (PA), PC, PBT, and glass-filled resins

• Better suited for: Higher-temperature and lower-flow materials due to increased injection force and control

**Material behavior (melt temperature, viscosity, and flow rate) will impact results in any tooling.

MicroMolder systems are not intended for continuous high-volume production (24/7 operation).

They are designed for prototyping, testing, and low-volume batch production. If your application requires continuous, high-throughput manufacturing, a larger industrial injection molding machine will be a better fit.

That said, unattended (“lights-out”) operation is possible under the right conditions.

Both systems include safety features and basic safeguards that can support unattended runs, but this depends heavily on proper setup. Reliable unattended operation typically requires:

• A proven, stable tooling design

• Consistent material feeding (sufficient hopper capacity)

• Dialed-in process settings

• Appropriate part ejection and handling

Neither system is specifically designed for fully autonomous production environments, but users may implement unattended operation where the process has been well validated.

Cycle time varies based on material, part size, and tooling design, but typical ranges are as follows:

MicroMolder Evo

• 3D printed tooling: ~1–3 minutes per cycle

• Aluminum tooling: ~30–90 seconds per cycle

MicroMolder+

• Aluminum tooling: ~20–60 seconds per cycle depending on part size and material

Cycle time is primarily driven by cooling, which is heavily influenced by tooling material and part geometry. 3D printed molds have significantly longer cycle times due to low thermal conductivity, while aluminum tooling allows for faster heat transfer and shorter cycles.

Actual cycle times will vary based on process setup, material flow characteristics, and part design.

MicroMolder systems are electrically automated injection molding machines, not manual or hand-operated presses.

All core functions—including temperature control (PID), motion control, and injection—are managed through onboard firmware. The system includes integrated safety features such as watchdog monitoring and E-stop functionality.

Injection is fully programmable, with adjustable profiles for speed, timing, and dwell. Settings can be saved and recalled for repeatable operation across different parts and materials.

The system also supports optical/smart sensing for part detection and process feedback, enabling consistent and controlled cycle operation.

Injection molding is a complex process with many variables that can influence the outcome. Because of this, we generally avoid giving definitive answers to hypothetical questions about whether a part can be produced. However, we can provide some general guidelines that might help you assess the potential for your design:

1. Machine Compatibility: If the mold geometry fits within the machine’s platen frame dimensions and the total volume of the mold cavity (including runners and sprue) is at least 15% smaller than the machine's maximum shot size, your design is within the basic parameters for our equipment.

2. Design for Manufacturing (DFM): Adhering to DFM guidelines is crucial. This includes considerations like wall thickness, draft angles, and avoiding features that could complicate the molding process. These guidelines help ensure that your design can be efficiently and reliably produced.

However, meeting these guidelines does not guarantee success. Several other factors can significantly affect the outcome, including:

• Mold Complexity: Intricate mold designs may require more advanced techniques and could lead to challenges in achieving consistent quality.

• Material Selection: Different plastics behave differently during molding, which can impact the final product.

• Gate Location and Venting: Proper placement of gates and vents is essential to avoid defects like air pockets or incomplete fills.

• Part Ejection: The ease with which the part can be ejected from the mold without damage is another critical factor.

Each of these elements, among others, plays a significant role in determining whether a part can be successfully produced.

Liquid silicone and plastic have different properties and processing requirements, which is why liquid silicone cannot be used with MicroMolder Evo or MicroMolder+

Material Behavior: Liquid silicone is a thermosetting polymer, meaning it requires heat to cure and solidify. In contrast, plastic used in injection molding is typically a thermoplastic, which melts when heated and solidifies when cooled.

Processing Temperatures: Liquid silicone requires specific curing temperatures and times, which differ from the melting and cooling cycles used for plastics. A plastic injection molding machine is not designed to handle these requirements.

Machine Design: Machines for liquid silicone injection molding are specially designed to handle the material's unique flow characteristics and curing process. These machines also include different types of screws and temperature control systems, which are not present in standard plastic injection molding machines.

Using liquid silicone in a plastic injection molding machines like the MicroMolder line of products would result in improper processing and will damage the equipment.