Machines with Independent Arms

Rotomachinery Group Independent Arm Machines

PRM/CRM Rotational Molding Machines

Independent arms machines are the state of the art in rotational molding: a single machine for simultaneous production of items of different thicknesses or materials, with different cycle durations or multilayer. The arms move from one phase to another without being tied down, so different durations can be determined for each station, creating the best possible production mix, increasing output and maintaining high quality.

The plant for the most advanced rotational molding processes: multilayer items, simultaneous rotational molding of items of different thicknesses and thus specific cycle time or need to handle Venturi effect on the molds for items of complex shape.

Features

– Configuration of 2, 3, 4 cart/mold-holder arms that alternate;

– Maximum spherical diameter moldable from mm. 1,000 to mm. 6,000 (PRM), from mm. 1000 to mm. 4500 (CRM);

– Standard European (PRM) and American (CRM) components;

– Automatic and independent management of each cart/arm;

- Chamber with high insulating power;

– High-efficiency oven ventilation to optimize cooking cycles;

– Electronic modular burner;

– Straight, offset, C-shaped mold-holder arms are fully interchangeable, with 1, 2, or 3 airways;

– Rapid molds balancing system;

– Direct gear transmissions without using chains;

– Cooling with high-performance fans;

– Operator interface with touch-screen;

– Perimeter consoles for arm movement management;

– Safety barriers and protections according to standards.

Features

Automatic and independent management of each cart/arm
Max moldable spherical diameter from mm. 1,000 to mm. 6,000 (PRM), mm. 1000 to mm. 4500 (CRM)
Standard European (PRM), American (CRM) components;
Automatic and independent management of each arms/arm;
Highly insulating chamber with no losses.
High-efficiency oven ventilation for optimized cooking cycles;
Electronic modular burner automatically controlled;
Straight mold-carrying arms, offset, C-shaped, fully interchangeable, with 1, 2, or 3 airways;
Quick mold balancing system;
Direct gear transmissions without using chains;

Additional info

Cooling can be single, double with or without doors. The layout can be adapted according to production needs and constraints at the installation site. The configurations provided range from the simple one- or two-carriage machine for testing the market to the solution with four carriages and double cooling for high production volumes.

The extreme flexibility of configuration of the independent arms machines is also demonstrated by the ability to easily and quickly replace straight arms with offset arms or C-arms. For each arm and thus for each rotational mold or group of molds, the exact duration of each phase and the correct molding temperature can be determined. The machine stores the combination of the molds on the arms and the process data in the production recipe.

Thanks to the efficient insulation of the oven, the study of air circulation optimization, the use of efficient digital burners, the presence of electrical energy regeneration systems and the rapid shutdown of the fans, these machines represent the milestone to date for energy saving.

Optional provided

Each rotational molding machine can be equipped with optional features for better process control, energy savings, and equipment to increase productivity.

Process control

Zero position search

Incremental management of secondary rotation allows the steps of loading/unloading and insert introduction/removal operations to be programmed.

Process control

Industry 4.0

The machine is connected to company management software and receives data from production orders to be fulfilled and applies stored molding recipes. It interfaces with the local network to communicate data from each cycle aggregated by period, arm, item or material for logistics and quality business processes. Visualization of operating conditions can be made available on PC, tablet and cell phone. 

Process control

Teleassistance

A communication device is installed on the machine that allows us to remotely intervene for assistance, configurations, and software updates.

Process control

Automatic cycle management

Thanks to the constant detection of temperatures inside the mold, the molding cycle is optimized with automatic switching from one work station to the next. Each cycle will be optimized for different molding conditions (hot/cold oven--summer/winter--type and quantity change), and tuning of the optimal cycle for new molds will be immediate. 

Process control

Temperature detection

Inside the mold can be achieved with removable systems fully integrated into the process logic that transmit real time information to the supervisory and control system.

Energy saving

Ecomode

Ecomode is an operator-activated oven operating function that provides significant savings in energy consumption. Under certain predefined conditions (empty oven or temperature below a set point, 200° for example) the burner stops and energy consumption is reset to zero. In ECOMODE when the burner is off, the flue gas extractor works at idle, reducing the mass of expelled hot air and the inflow of clean cold air.

6 Stations (4 working and 2 waiting)

– Cooking and formation of the product;

– Intermediate waiting phase for cooling;

– Main mold cooling;

– Waiting and mold opening station;

– Loading material into molds;

– Waiting station or pre-molding, for second layer or sandwich.

– Configuration of 2, 3, 4 cart/mold-holder arms that alternate;

– Maximum spherical diameter moldable from mm. 1,000 to mm. 6,000 (PRM), from mm. 1000 to mm. 4500 (CRM);

– Standard European (PRM) and American (CRM) components;

– Automatic and independent management of each cart/arm;

- Chamber with high insulating power;

– High-efficiency oven ventilation to optimize cooking cycles;

– Electronic modular burner;

– Straight, offset, C-shaped mold-holder arms are fully interchangeable, with 1, 2, or 3 airways;

– Rapid molds balancing system;

– Direct gear transmissions without using chains;

– Cooling with high-performance fans;

– Operator interface with touch-screen;

– Perimeter consoles for arm movement management;

– Safety barriers and protections according to standards.