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Automatic Tension Control Retrofit Package Available

MAXSON AUTOMATIC MACHINERY COMPANY (Westerly RI) offers a retrofit package for unwinds allowing automatic brake compensation as the roll diameter decreases.

The retrofit package frees the Operator from adjusting the brake pressure while rolls are being converted.  The proportional tension design is superior to either a dancer roll or load cell tension control approach because:

  • It is easier to install
  • Simpler to use
  • Provides the precise web tautness that is required for accurate cut offs on sheeters.

The retrofit package includes a tension controller, an electronic-pneumatic (E-P) converter and a proximity sensor.

The Operator inputs the initial roll diameter, the core diameter and material thickness.

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The sensor monitors the number of rotations of the roll stand spindle.  This reducing diameter signal is fed to the tension controller.

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The controller sends voltage to the E-P converter.  As the diameter reduces, the voltage lowers. The E-P converter translates the voltage to air pressure.  As the voltage decreases, air pressure to the roll stand brakes is reduced.

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When tied to the sheeter’s logic control, an added feature of the retrofit package is the ability of the tension controller to monitor a preset “low roll” diameter condition.  When a “low roll” diameter is reached, a signal is sent to the sheeter drive to slow down to a minimum line speed and stop at a preset diameter a few  wraps before reaching the core.

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Holographic Sheeter Cuts Preprinted Material to Exacting Registration

The MDH Sheeter can be configured to include a delivery system designed to avoid marking the sheets and a cut to registration system that permits converters and printers to produce sheets of preprinted holographic material.

The MDH Sheeter can be configured to include a delivery system designed to avoid marking the sheets and a cut to registration system that permits converters and printers to produce sheets of preprinted holographic material.

MAXSON AUTOMATIC MACHINERY COMPANY  offers equipment that permits converters and printers to produce sheets of pre-printed holographic material.  Outfitted with a shaftless unwind, web steering unit, slitter rig, cut to registration system the MAXSON MDH Sheeter is also configured with an overlapping delviery system that conveys sheets to the pile without marring sensitive coatings.

The sheeter is outfitted with a high resolution scanner that can detect registration marks embedded in the holographic web.  A sophisticated motion control program governs the positioning of the cross cut to maintain tolerances to within +/-0.010” (+/-0.25 mm) of the registration mark, regardless of sheet length or line speed.  the ability to offset the cut a preset length from the registration mark is also a part of the program.  The sheeter insures exceptional product quality by continuously monitoring the accuracy of sheet registration.  Any sheets that do not maintain accuracy specification can be automatically diverted from the sheet flow to the stacker via a reject gate positioned immediately after the cutter.

The overlap carriage has an adjustment that allows the depth of the ringed roll to be set relative to the bottom slow speed tapes. This variable nip setting eliminates the burnishing on sensitive sheets caused by excessive contact with the packet’s surface. The top high speed tapes pass in between the rings of the overlap roll, removing the likelihood of belt marks.

 

MAXSON Sheeters Outfitted with SCADA Capabilities

Sheeters offered by MAXSON AUTOMATIC MACHINERY COMPANY (Westerly RI USA), in addition to the facility to diagnosis and correct electrical problems from a remote location, are now available with Supervisory Control and Data Acquisition (SCADA) capability.

The SCADA system, when connected to the Customer’s local area network via an Ethernet port to the sheeter, provides real time production information (such as run speed, production output, down time) to the Company’s management information system, reports or labels for pallet outputs to a Customer supplied printer or bar labeler, and the ability to schedule and recall Customer orders for purposes of Sheeter scheduling.

In addition, the condition of the sheeter is monitored at all times.  Over 200 diagnostic, fault and error messages that annunciate emergency stops, open safety interlocks, applicable jam detection, and status of the drives, motors and encoders can be identified at either the sheeter or from a remote location.  This diagnostic capability provides Operators or MAXSON Customer Service in Westerly RI the ability to quickly identify the source of a machine malfunction, provide service personnel direction in executing corrective action, allow on site or off site programming modification and/or detect failed electrical hardware.

Filtration Media Sheeter Triples Productivity

The stacker can be outfitted with a tag inserter to identify ream count

The stacker can be outfitted with a tag inserter to identify ream count

MAXSON AUTOMATIC MACHINERY COMPANY offers a sheeter designed to convert rolls of filtration papers and non-woven material into finished sheet sizes.  Equipped with multiple roll stands, precision accuracy, and exact counting and marking of reams, the sheeter triples the productivity of operations that use conventional converting methods.

The cutter’s dual motor drive sheet length control, anti static devices and customized jogging system allows for high speed conversion of multiple webs of up to 220 lbs/330 sq ft (325 gsm) material on cut offs between 15” – 60” (380 – 1525 mm) lengths that eliminate the need for secondary handling of sheets after stacking.

The innovative use of air and anti static components permits speeds as high as 600 fpm (185 mpm) on the flimsiest filtration media material.  Introducing ionized air at the time of the cutting action, overlapping of sheets and in the delivery of the cut packet into the stacker allow for jam free operation at higher speeds.

Using MAXSON’s counting and marking design ream counts as small as 25 sheets can be accurately and reliably identified allowing for small batch orders to be individually packaged after sheeting

Dual Knife Rotary Cutter Retrofit Upgrades Sheeter Performance for Moderate Cost

The dual knife design mounts both top and bottom blades in rotating cylinders coupled together with anti backlash gearing.  The synchronized speeds of the blades to the web result in the cleanest, quietest, dust free cross cutting action available.

The dual knife design mounts both top and bottom blades in rotating cylinders coupled together with anti backlash gearing. The synchronized speeds of the blades to the web result in the cleanest, quietest, dust free cross cutting action available.

MAXSON AUTOMATIC MACHINERY COMPANY offers a retrofit package that upgrades existing stationary bed knife cutters with state of the art technology.  The compact design allows for straightforward replacement of the older cutter with minimal interruption of ongoing production.  The retrofit package can be fit to any rotary sheeter.

The two cross cutting revolvers increase production by allowing knife loading up to 1000 pounds/3300 ft2 (800 grams/meter2). The unique blade adjustment clamps allow fine tuning of the cross cut blades and extends knife life to four times that of conventional cutters.

The dual knife design mounts both top and bottom blades in rotating cylinders coupled together with anti backlash gearing. The synchronized speeds of the blades to the web result in the cleanest, quietest, dust free cross cutting action available. Outfitted with digital electronic controls, accuracies within +/- 0.010” (+/- 0.254 mm), are maintained. Because the speeds of the blades match the speed of the web at time of cut, no adjustment for squareness is required.

MAXSON Sheeter Designed to Convert Tyvek® Offered

The versatile MSS Sheeter can convert rolls of Tyvek into precisely stacked piles for the Envelope, Industrial Packaging, Medical Packaging and Graphics Industries

The versatile MSS Sheeter can convert rolls of Tyvek into precisely stacked piles for the Envelope, Industrial Packaging, Medical Packaging and Graphics Industries

A versatile sheeter designed by MAXSON AUTOMATIC MACHINERY COMPANY to convert rolls of Tyvek® into precisely stacked piles is available to the Envelope, Industrial Packaging, Medical Packaging and Graphics Industries.

Outfitted with a dual motor drive technology that maintains accuracies of + 0.015” (+ 0.381 mm) sheet length and a slitter rig that can produce custom sizes in multiple piles, the MAXSON MSS Sheeter eliminates the need to guillotine oversized sheets to a finished dimension.  The technology improves productivity while minimizing costly waste.  Available in trim widths up to 65” (1651 mm) the cutter’s standard configuration allows for a 16” – 55” (407 – 1400 mm) cut off, although extended lengths and shorter digital sizes can be accommodated.

The delivery system is outfitted with static eliminating equipment and an air delivery system that productively runs the lightweight non woven product at speeds up to 300 fpm (90 mpm).  The Sheeter’s design allows quick set up (less than 5 minutes) of the cutter, delivery system and stacker permitting economical operation of small custom orders as well as longer production runs.

The stacker provides skids of press ready sheets weighing up to 2000 pounds (2727 kilograms).  The jog box’ jogger blades and front stop are easily set without hand tools and the Sheeter’s low profile permits easy access to the converted product.

MAXSON Offers Economical Self Loading Shaftless Roll Stand

The roll stand can be outfitted with automatic tension control and low roll diameter detection to minimize Operator adjustment while the roll is unwinding.

The roll stand can be outfitted with automatic tension control and low roll diameter detection to minimize Operator adjustment while the roll is unwinding.

MAXSON AUTOMATIC MACHINERY COMPANY offers an economical self loading shaftless roll stand that provides a safe method to reduce down time due to roll changes.  Motors on each slider base drive a power screw, moving the post in or out.  The roll is raised and lowered by a roll lift screw jack on each post.  The Operator positions the roll between the two posts, chucks the roll and raises it into place.  No overhead hoists or fork trucks are required to load the roll.

The CITATION Roll Stand’s durable design and rugged construction permits continuous service at 1300 fpm (330 mpm). Generously designed power screws, oversized stub shafts, rugged gear motors, and dual pneumatic disc brakes accommodate up to 6,000 pounds (2725 kg) and 72” (1830 mm) diameter rolls. Tapered chucks from 3” (76 mm) to 16” (407 mm) diameter handle various core sizes.

The roll stand can be equipped with automatic tension control that reduces the brake pressure as the roll diameter decreases, a low roll diameter detection circuit that stops the process when a minimum roll diameter is reached and edge guidance to compensate for telescoped rolls

Penetrating Breaker Roll Decurl Retrofit Reduces Sheeting Waste

Schematic of penetrating breaker roll design with back up bearings

Schematic of penetrating breaker roll design with back up bearings

MAXSON AUTOMATIC MACHINERY COMPANY offers a decurling component that can be retrofitted to existing rotary sheeters to reduce curl related waste.  The penetrating breaker roll decurl unit, mechanically flattens the incoming web caused by roll set near the core.  The resulting action insures flat sheets at the sheeter’s pile.

The penetrating breaker roll design employs a free spinning breaker roll that is supported across the width of the assembly by back up bearings, which are mounted on a rigid cross member.  In cases when the breaker roll is small, magnets are used to hold the steel rod in against its back up bearings.  The breaker roll penetrates into the web against a king roll decurling the web.

The decurl assemblies can be designed to accommodate multiple webs, ranging from 40# – 0.040” thick (60 – 800 gsm) material.  Each decurl station can be outfitted with various diameter breaker rolls that can flatten the web without damaging the surface of the material.  Positioning the decurl penetration can be accomplished manually or automatically by the motorized controls provided.

The free standing assemblies are designed to easily fit between the infeed of the sheeter and the roll stand area to minimize installation effort.  Properly designed decurl units can reduce roll waste by up to 2% of total weight.

Compact, High Speed Envelope Sheeter Available

Envelope manufacturers can sheet stock to precise dimensions with the MAXSON MSP Sheeter.

Envelope manufacturers can sheet stock to precise dimensions with the MAXSON MSP Sheeter.

Envelope manufacturers can sheet stock to precise dimensions with the MAXSON Envelope Sheeter. Available in widths up to 57″ (1447 mm), the MSP Sheeter can run at speeds of up to 1000 fpm (308 mpm) while maintaining tolerances of +/- 0.015” (+/- 0.381 mm) length accuracy.

The Sheeter’s compact size requires minimal floor space and only one Operator. Various stacker configurations are available, permitting lengths up to 65″ (1524 mm) long to be sheeted. Outfitted with the Maxson Airfoil Overlap, it runs lightweight grades of paper jam free at high speeds.

Though capable of cutting up to 8 rolls at a time, the Envelope Sheeter is usually outfitted with four shafted roll stands for short runs and individual decurling units to minimize waste associated with curl set. Typically, three four roll sets can be run within 8 hours.

MAXSON Outfits Sheeters with Automatic Squaring Capability

An automatic squaring system on stationary bed knife cutters relieves the Operator of making that adjustment when setting the cut off. The design insures accurate, repeatable positioning is maintained.

An automatic squaring system on stationary bed knife cutters relieves the Operator of making that adjustment when setting the cut off. The design insures accurate, repeatable positioning is maintained.

MAXSON AUTOMATIC MACHINERY COMPANY (Westerly RI USA) offers an automatic squaring system on its stationary bed knife cutters, or as a retrofit to existing sheeting equipment, relieving the Operator of making that adjustment when setting the cut off.  The design insures accurate, repeatable positioning is maintained.

An AC servomotor, mounted on a gear head, is coupled to a fine threaded screw.  The servomotor is governed by a microprocessor, which mathematically calculates the squareness for the cutoff setting.  The servomotor turns the screw, positioning the cutter head accordingly.  Sensors set for the minimum and maximum cut off range prevent over travel.

Squareness of +0.020” (0.508 mm) is maintained.  A manual over ride switch permits the Operator to set the sheet squareness and when returned to automatic mode assigns the manual setting to memory for the given sheet length


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