The positioning flexibility and overall working range of the six-axis robot are the keys to its success in the field of injection molding. The additional degrees of freedom provide more options for all phases of material handling, assembly, and other applications, translating into tangible process benefits:
Process advantages of six-axis robots
Flexible execution of pre- and post-injection processes
Placing an insert into a mold and moving the part through the post-injection process is a complex movement with very demanding angles and positions.
Reduce tooling costs
Four-axis Cartesian robots often require complex tooling to compensate for their kinematic limitations. The range of motion and flexibility of the six-axis articulated arm robot reduces the cost of tooling and fixtures, simplifying complexity.
Flexible loading of precision inserts
Thanks to its positioning flexibility and repeatability, the six-axis robot can pick up and embed precision inserts.
The removal process for complex parts is simplified
Complex parts are difficult to demould without ejector rod assistance, but the dexterous six-axis robot makes it easy to remove parts from the mold.
Avoid obstacles flexibly
Tie rods, sliders, hoses, and clamps often interfere with the movement of parts. The six-axis robot has a high degree of flexibility and can find the correct path around the mold.
Maintenance life
The six-axis robot is sealed to reduce maintenance and increase uptime. In injection molding applications, the drivetrain of most Cartesian robots is exposed and therefore requires regular maintenance.
Flexible installation
Many six-axis robots can be mounted in different orientations to optimize layout, working radius, and cycle time. Typical installation methods are floor-mounted or pedestal-mounted with the safety door open at the rear of the injection molding machine, but other methods such as wall-mounted or upside-down installation can also be used. Most six-axis robots are installed in a fixed orientation and must be set up when the robot is manufactured in the factory. Other models can also be quickly set in the installation orientation on site.
The top clearance is smaller
Cartesian robots have a major drawback: the vertical (Z) axis extends above the center line of the robot. If it is not equipped with a complex and expensive retractable Z-axis, the height of the ceiling must be at least the same as the extension height of the Z-axis. Limited by the layout of pipes, reels, water, steam, and fire lines, many plants struggle or even make it impossible to meet these requirements. However, even in low-ceiling facilities, six-axis robots can be mounted on injection molding machines.
Efficient use of floor space
In any factory, floor space is always at a premium. As molders add more and more front- and post-molding processes to their product production processes, they increasingly require floor space around their machines. Airborne six-axis robots offer the benefits of six-axis flexibility while freeing up floor space for other uses.
Easy access to machine space
The molds needed to be replaced, and the maintenance department needed access to the machine space. If the six-axis robot is mounted on the machine or on the ceiling, this means that the machine space can be easily accessed when needed.
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