extrusion. - colored window film
Automatic mold for fast extrusion of blowing filmtool-
Replacement systems and robotic products
Processing equipment for configuration files and new molds
The tube centering system is some of the more striking components of the extrusion equipment.
An improved tablet feed is also reported below
A new type of in-mold extrusionbarrel melt-
Viscosity sensor, double
Among other developments, the spiral blown film coex system, many new controls and advanced new bag making machines.
In the film blowing line, the novelty is in the automatic mold, double
The spiral of the "window" film is crowded together with a tiny twin
3-mold systemin. layflats.
There is also news that it is becoming more and more complex in terms of control, hoist and bubble cooling.
As reported last month (p. 13)
A particularly interesting development of blown film technology is the emergence of a second commercial automatic mold, the mechanical-operated version of Reifenhauser, unlike the heat-controlled Optfil P automatic mold, which was first introduced by Windmoeller & Hoelscher in 1988.
During the exhibition, Reifenhauser claimed in three-layer, 60-mm-
Thick film]+ or -]6-8% at start-
Get up at most once a day. of [+ or -]
Piezoelectric 2% using Reicoflex-
Bolt adjustment system, configuration files are usually in [+ or -]1. 5% range.
At the same time, W & H has released its Optifil Plus control system, which is designed to provide "modular" Automation of the three-tier blown film production line.
First, the operation data recording enables several extrusion systems to be connected to a single host that can investigate production, failure, downtime, and cause of failure.
The "partial automation" function allows to customize the base system by adding supplementary modules such as thickness measurement, width control, or contour control.
The highest level is a fully automated process-
It is possible to store and retrieve data on hundreds of products and provide a control package for print output for factors affecting quality.
The system can be extended to control the entire extrusion device by connecting the membrane line to the host through the LAN.
Barmag's BF12 Baroflex co-extrusion production line can use EVOH or nylon as a barrier layer to produce a blown film of five to seven layers.
Five mold rotators can be installedor seven-layer dies.
The crane runs on the rail and enters the Mold area to replace the mold.
Standard V for downstream equipment and Barmag-layer film.
In addition, the company presents a new blown film mold, which is described as a "optimized" investment mold
The distribution system divides the melting flow into two separate flow paths and distributes them evenly upwards throughout the mold week.
The dispenser plug distributes the melt in the opposite direction, which results in two-
A two-layer film consisting of the same resin.
In downstream equipment, Barmag introduced a new hoist consisting of two main components: the contact roller unit and the hoist itself.
The contact roller unit has a large groove contact roller driven by d-
C motor and contains the whole mechanism for automatic roll change, stretcher roller and measuring roller for monitoring winding tension.
The winding machine consists of a bracket that can move horizontally on a special track.
The pneumatic cylinder moves the bracket, puts pressure on the contact roller and maintains a constant gap between the package and the contact roller. Kuhne GmbH (
Represented by O/K International)
Demonstrated its K 70 turbine cooling line for high density polyethylenein. -wide take-
Able to reach 492/minute off, second ARY clamp and automatic winding machine.
An important feature of the system is the internal bubble stabilizer installed on the IBC exhaust pipe, whose height can be externally adjusted during production.
Perforated iris diaphragm, also with height
Adjustable, located on the stabilizer to ensure that the film neck is evenly positioned on the stabilizer cone.
This is also shown by Kuhne's new fully automatic contact winding machine, FOW 1/H 16 CC.
It can be used for contact winding with controlled contact pressure, center winding with center assist and constant clearance.
It can produce 47-in. -diam.
Rollers for contact winding and 39-in.
Rollers for center winding.
There are two new film blowing lines at the Alpine exhibition. A new computer-
50 layer coex linemm, 90-mm, and 65-
Mm extruder, oscillation-
Turn and turn-
Automatic winding machine and automatic winding machine (WDP 20)with take-
Close speed up to 492/min.
The HS 75 R blown film line is also the first time to show.
It has a rotary extruder which is said to be able to get high yield in single layer extrusion-e. g.
, 772/hour of llannan.
The system includes a new internal/external cooling mix ICS/PEAC and a new ecs I process
Throughput Measurement and take control system
Turn off speed control.
A combination of the mechanism
Screw extruder with special blow film equipment, co-extrusion PE "window" film by BTS4 mold production.
The extruder uses the ladder screw geometry between the full mesh, and it is said that it can provide consistent melting output on the mold, thus being able to produce the blowing film and the flow film without the help of the gear pump.
The color film co-extrusion function with clear window eliminates the secondary printing operation.
Macro-engineering introduces an interesting twin.
Feeding twin mold mini extrusion line
Lane bag machine.
The production line is capable of producing 3-60 lbs/hourin. -
Lay low density polyethylene at a speed of 150/minute.
One reason for the relatively high productivity is the double
The company claims that the lip air ring is a unique part of this small mold.
It is reported that macro has sold such a line to Evenflo
It's used to produce babies. bottle liners.
A high-investment film and film
Welex's barrier PET sheet coex line shows some new developments. Two 3-1/2-in.
Extruder and two 2/2-1/2-in.
The extruder is connected together by a new DB (double-barrier)
Raw material blocks capable of producing up to 11 layers of plates, including two barrier layers and four adhesive layers.
A new sheet.
The Off design has primary and secondary cooling rollers.
Elementary school three-
There are 450 stacks-mm diam. , hard-
Rollers that surface can quickly quench the paper from both sides and allow the mold to be close to the roller clamp to avoid paper sagging.
The waste heat is two 600-mm, thin-
Wall Cold Roller.
A separate drive is provided for each roller segment and the last main roller to reduce plate stress.
The whole system is controlled by a new Ultima II console with color graphics and trends
Monitoring capability. A touch-
The screen interface does not need to be typed on the keyboard.
By the way, Frank Nissel of Welex believes that as a substitute for PP and PVC, interest in extrusion and thermoforming of amorphous PET plates is high.
Barmag also demonstrated its ability to expand in multi-layer streaming films at its R & D facility in Remsheid-Lennep, W. Germany.
Depending on the raw material and film
Thickness range, both cold
Rolling unit of various strings
System, or complete-
Rolling units can be used.
Up to five extruder units can be integrated into production lines for extrusion of PP, nylon, PET and hips.
The gear pump ensures uniform fusion discharge.
The feedblock is said to allow for a quick change of the desired layer position.
A new multi-functional Dynatronic winding machine is presented on W & H's Filmex streaming film production line.
The biggest winding machine. roll diam. of 31-1/2 in.
, Provides automatic roll change and allows the preparation of the core and removal of the finished roller in multiple slitting.
In the production of BOPP Film, increasing the wire speed and increasing the winding diameter are two trends.
Brukner, for example, is the largest.
Line speed of 13-984/minuteft-
The BOPP Film is wide and has a winding diameter of 47 in. on 26-ft-wide film.
Cellier presents a new BOPP Film clip system that claims to have been tested in 1968/min.
It is reported that this clip only uses a small part of the lubricant used by other chain systems on the market to protect the product from contamination.
Cellier also introduced a new heating roller with a permanent sealed circulation chamber.
The liquid inside Chember is heated into steam by electricity or gas.
It is reported that steam is cycled in a sealed double sleeve at a rate higher than the cycle-fluid systems.
It is said that other advantages are uniform temperature distribution, clean operation.
As we reported last month, profiles, tubes and tubes (p. 13)
One of the most novel extrusion exhibits at the exhibition is Krauss-
Maffei takes advantage of rapid change tools and robotics, which may cross from molding to extrusion molding.
Attached photos show some of the basic features quicklychange system.
Other new features of the production line include ionising air jets to blow off the sawdust and eliminate "static Attachment ".
"It is reported that the differential gearbox on the puller ensures the same pull force on both belts, both ends of which are oriented to prevent misplacement.
In addition, KM has added new features to its MC3 controller, including built-in features
Weight feeding control (
For Inex hardware).
The mold centering device is also newly launched by Krauss-Maffei (see photo). Pipe wall-
The thickness distribution is measured by up to eight ultrasonic sensors installed around the perimeter of the pipe in the vacuum tank, which is immediately after the size measurement device.
It is said that this position allows the sensor head to react quickly to the difference in wall thickness, so that deviations can be corrected almost immediately.
In addition, they are cooled by circulating water, so the temperature changes do not distort the reading.
Because the sensor is stationary and the reading is performed at the same time, the possible machine is not complicated to measure-
Change in direction thickness.
The actual adjustment is carried out by a rotating mechanical socket wrench, which is driven by a computer that remembers the last position of each sleeve Bolt so that the wrench sleeve can slide easily
Another new development of Profile extrusion is 65-mm twin-
Screw extruder with planetary gear from Battenfeld stechnik (rep.
It is said that a wide range of speeds can be achieved at a deceleration stage and run at a high torque ratio, resulting in higher throughput.
The entire profile system consists of a new-
BEC 2000 control system was developed.
Configurable alarm system warning setting value deviation and failure.
The modular architecture of the control allows full opening-or closed-
Control, various communication methods, extruder control and coordination of various subordinate systems.
Actual plastic technology company demonstrated a method for double extrusion of PVC window profiles on standard extrusion lines
The system only requires changes in the mold and calibration;
The extruder and downstream equipment remain unchanged.
The central part of the system is double extrusion sync, by double extrusion sync, when both profiles are pulled out at the same force and speed, the wall thickness of the two profile strands can be optimized.
Key measurement after the mold or the relevant wall thickness measured after the first calibration--
Stored in the microprocessor as a reference. Corma, Inc.
The type 820 HSL vacuum mixer machine is introduced, no vacuum rod is required.
The output is 1750/hour.
According to Corma's president, Goethe Lupke, one of the advantages of this machine is that it can form a wider range of plastics than usual.
The company sold a set to a customer in the Netherlands for £ 36in.
Bellows, and machines forming 60-in.
The pipeline will go public about a year later.
Betol shows a new version of its bubble
The pipe extrusion production line using the new microprocessor improves the selection and control of bubble size, wall thickness and spacing.
The production of controlled bubbles provides a built-in
In the funnel connector, the need for injection is avoided
Molded connectors on straight pipes.
PA, introduced its Lambda feedback block for tablet
Die extrusion is expressed as a problem of encapsulation and instability when polymer coextrusion with different viscosity is avoided. ER-WE-
Dragan Djordjevic of PA described it as "the shortest feed block on the market" because in his view, avoiding long channels after combining polymer layers is to prevent instability
Instead, he said it would be better to "expand and squeak" The layer to the final width and thickness immediately after assembling the layer structure.
In fact, the land feed block was built in the coathanger die.
It is said that the test results of polymers such as nylon, PET and polycarbonate have improved in terms of distribution and packaging control.
The Feedblock has a slot for external adjustment of the skin layer and is fast
Changing the module allows the layer structure to be adjusted.
Claus-control and sensor
Maffei shows its universe (
Central online supervision of mechanical operating systems)
The connection of the mixing mechanical pool is allowed.
The central computer is IBM-
Compatible PC with up to 64 data-
Acquisition Station and host.
Machines equipped with MC2 or MC3 control systems can be connected directly to the central computer, allowing access to all machine data and functions, including setting points, actual values, alerts, and step displays. ER-WE-
PA demonstrates its precise process control, a modular system that provides centralized control of functions such as temperature, automatic mold, and provides alarm indication, production data storage, and data recording.
Modularity means that it can be configured at any level, then extended to the integrated control system, and based on IBM-
Compatible with OS/2 operating software.
Inoex has introduced the weight control unit Dosex 90, which measures the consumption of primary and secondary components.
Each batching station is designed into a modular system that can weigh up to six components per extruder.
It is reported that one of the advantages of the weight analysis system is that it is integrated into the closed system of Reifenhauser
The circulation process control of the blowing film can compensate the large block
Change in density of resin or pigment.
The result is not only good batch control, but also better layering
According to Reifenhauser, thickness control in co-extrusion
Hector makande, fan Donne's membrane blowing system manager.
Spectral beam FSIR (
Full spectrum infrared)
Sensors from Aeonic systems are said to be able to measure substrates that are difficult or impossible to measure using previous techniques.
The unit claimed to be monitoring nearby-
Infrared spectrum and optics allow access to a wider spectrum (1. 3 to 3. 4 microns).
It is said that this provides information on the simultaneous conduct of various measurements.
Gneuss kunstofftechnik also showed off the new extrusion controls and sensors, the company is known mainly for replacing screens (see below).
The company is testing a prototype system to control the extruder drive and barrel temperature, gear pump and screen changer.
A new development of the company is the viscosity sensor (VM2)
Using two separate pressures
One at the end of the sensor, pointing radial to the center of the melting flow (
Such as Standard sensors)
, The second on the side of the sensor tip points upstream along the melt
The flow axis, the motion of the sensing material.
Unlike standard sensors, this method distinguishes, for example, an increase in melting pressure caused by screen clogging and a change in true viscosity.
And a microprocessor. based melt-
Pressure amplifier (DMV 1000)
It is said that this is compatible with many different sensor systems.
Automatic filter system
Purge model is one of several new versions of its continuous rotation model
The fill changer introduced by Gneuss (
See illustrations and PT. '89, p. 51). The self-Clear function--
Especially useful for recycling or scrapping
Each screen pack is allowed to be reused.
Clearing is done by taking a small amount of molten material along the direction of oppsoite to the main melt logistics through a part of the screen, clearing the screen of dirt particles.
The company plans to build a demonstration lab.
Part business in New Jersey this year. A continuous-
Flow filtering (CFS)
The system was introduced by Bellinger. Its dual-flow, single-slide-
It is said that the board design provides uninterrupted polymer filtration during screen changes without the need for circuit breakers-
Plate treatment or cleaning without polymer degradation.
The microprocessor controls processing positioning and pre-filling operations. BAG-
In the bag making machine, the manufacturing equipment servo drive and electronic control seem to be the most advanced technology.
Windmoeller & Hoelscher introduces the new generation of Polytronic PE bag manufacturers with servo drive and electronic control.
The size conversion is done by entering a new setting in the Procontrol electronic controller.
Seven servo drives for machine intermission
Clutch is not required for the feed part-and-
Braking devices, gear drives and belt drives.
The servo motor enables the welding time to be freely selected and adjusted independently of the feed.
Can Match network tension according to the feature of the movie.
The modular structure of the unit is reported to facilitate access to the machine area. A T-
It is said that the shirt version of the machine is still one year away.
The new bottom welding bag making machine is also equipped with servo drive and microprocessor control (SA 91 E-11)
From Alpine Elba, it is able to fold and stack bags separately.
New SA 90 E-11 servo-driven T-
Shirt Charter is also shown (PT, page 89, July. 73).