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| ▪ All electric
▪ Horizontal
▪ General purpose
▪ Tonnage: 15~460tf (18.5~507USton)
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ADVANCED NEW ELJECT |
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NISSEI electric injection molding machines have been developed by being in tune with the needs in the field and years of accumulated expertise. Since its debut in 2003, the best-selling “NEX Series” is equipped with a variety of high-value-added software applications. Its enhanced operability and unmatchable machine performance materialize the expansion of molding capability and high-quality production. |
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Nissei proposes "ECO-molding" as an ideal environment-friendly molding method. It is not only safe to our environment, but it is also economical because of the measures taken for degassing, warpage, and sink of the products, which can reduce the operation cost and prolong the service life of mold and machine. |
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Energy
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Measures in gas release and other defects |
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Longer maintenance cycle and mold life |
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Longer service life of toggle |
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KEY FEATURES
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…Recommending optimal (minimal) clamping force setting |
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NEX140 (154 US ton/140tf) also available |
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12.1 inch color liquid crystal screen
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Tilting mechanism allows to change the screen angle to meet the operator’s preference
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Quick-response and high-resolution touch panel
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High-speed control cycle: 100 µsec
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A six-language (Japanese, English, Chinese, Spanish, Korean, and Thai) display system is provided as standard
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Reinforced quality control functions (enhanced product quality judgment function)
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Enhanced programming function
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Internal memory for molding conditions: up to 300
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LAN and USB ports are provided as standard
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Easy access to the quality/production control system “PQ Manager”
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Up to 1.5 times faster and 3.2 times quicker response (compare to the previous NEX Series)
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Different injection speed modes can be selected [standard/high-velocity (ultra high-velocity)/high-load modes]
* High-load mode: effective for molding that requires longer injection time (pressure holding time)
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High-velocity,
quick response waveform (NEX50-5E) |
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0~500mm/s
(19.7 in/s) response time |
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The selection of one of the two control modes that enables high-precision metering: “Pre-packing” and “Precise metering.” |
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Pre-Packing |
It can be controlled with a standard screw tip! |
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Metering |
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Pre-Injection |
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Reversing |
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Injection |
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(Relative position control) |
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It provides a consistent metering density and injection volume and stabilizes the response of a check valve.
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It is effective for coping with instability
caused by using crushed materials and material
lot.
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It is effective for optimizing the clamping force or reducing it to the minimal level.
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Weight
of bar flow product |
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Number
of shots |
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: Pre-packing ON |
: Pre-packing OFF |
Molding
machine: NEX50-5E
Product: Bar flow test piece
Resin: PBT |
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Comparison
of three materials containing: (1) virgin
material and (2) virgin material + regrinded
material.
» Both show its positive effect.
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(1)
: Virgin material |
(2)
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Virgin material |
+
regrinded material (50%) |
Molding
machine: NEX50-5E
Product: Bar flow test piece |
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Precise Metering |
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It is effective for high-velocity screw rotation during high-cycle molding and stablizes the metering stop position (SM value). |
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Structural analysis of stationary platen
…Displaying 1/2 of the die plate |
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The newly designed movable and center-supported stationary platens, which were developed by applying the structural analysis data, reduce the deflection and ensure even distribution of clamping force. |
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It monitors a rise in resin pressure during filling process and corrects the screw position thereafter.
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It is effective, especially when a change in peak pressure at the V-P changeover position is adversary affecting the product’s quality.
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..."Linear pressure toggle" made possible |
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Factors of clamping force change in toggle machine |
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Automatically adjust clamping force deviation due to temperature change (common in toggle machines) and distribute pressure evenly.
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No need to stop the machine for clamping force readjustment.
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Be able to set more optimal and minimal clamping force than previous series.
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Since the clamping force is reliable and stable, it is easy to do measurements for defectives, such as insufficient gas release, warpage, and weld.
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Effect of automatic clamping force adjustment |
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[Clamping force 500-kN (56-US ton): with automatic correction vs without automatic correction] |
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Just like a direct-pressure molding machine, changing clamping force during continuous molding operation is possible.
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The clamping force is one of the most important factors in molding.
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This direct clamping force setting is highly effective for ECO molding.
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Detect foreign substances in mold with “ultra
high-speed reaction” |
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Detection
time: |
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Graph overlay function has been added and
is easy to use |
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The selection of “High-sensitivity super
thin object detection mode” is available
(optional) |
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With a conventional machine’s general foreign substance detection, the vertical rib section is crushed completely while NEX Series with the high-sensitivity mold protection function keeps the original shape near perfectly. |
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General
foreign substance detection |
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High-sensitivity
foreign substance detection (NEX) |
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| Original
Shape |
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▪ Visualized clamping force (clamping force display for mold protection) |
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This function visualizes actual clamping force and that of when the high-sensitivity mold protection is executed, improving user-friendliness of the protection function further. It grasps the mold position and clamping force when a foreign object is detected and is also effective in preventing gnawing of angular pin and slide. |
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The modern molds are becoming more complex and large. In order to cope with this trend, we have extended the tie bar clearance to that of one-class larger machines. It can mount not only a horizontally one-class larger mold, but also a vertically over-sized one can be installed on to the machine.
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Further reinforced stationary and movable platens.
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Machine type |
Tie bar Clearance mm (inch) |
Conventional type |
Wide type |
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A magnetic clamp and T-slot clamp as well as thick molds, such as hot runner, deep well, and split molds can be mounted. |
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Magnetic clamp |
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Magnetic clamp-equipped Nissei machine sales |
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Comparison of abrasion loss of the new toggle pin
…approximately twice as durable as existing toggle pins |
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Toggle pins, movable platen slide, and many other small parts of the sliding section are made from high-rigid/high wear-resistant materials to maintain high-precision mold opening/closing operation for a long time. |
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Major sliding sections are automatically greased |
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