FLEXIBLE CAST EXTRUSION SYSTEMS IN MODULAR UNITS

CAST Flex® . . . productivity, flexibility

A cast line involves not only the assembly of components, but also requires implementation of specific design skills, technologies, electrical and mechanical engineering expertise. Experience needs to be fielded in collaboration with qualified users. Macchi possess the resources and the experiences gained in over forty years of activity, that allows to maximise in any line production efficiency, energy saving, ergonomics and ease of operations. This, in short, is what Macchi offers: its Know-how. The production of cast film offers several benefits over that of blown film: • the system offers...

13 12 09 06 08 07 04 05 10 15 11 01 03 02 02 16 18 14 10 Trim suction and conveying 11 Fluff de-dusting and conveying 12 Operator panel 13 Containerized electrical plant 14 Core feeding unit 15 Shaft handling and recoring 16 Reel handling system 17 Water chilling plant 18 Pumping and temperature control units 1 Main extruder 2 Coextruders 3 Fluff re-feed extruder 4 Feed block 5 Flat die 6 Chill roll unit 7 Thickness scanner 8 Web gauge randomizer 9 Winder

17 In the same vein as the blown systems, the co-extrusion unit is mounted on a single raised technical platform in such a way that the melt can be transferred via extremely short and rectilinear channels to the extrusion head. At the top, a second service level ensures safe and convenient access to the resin inlet and outlet systems. At the bottom of the structure supporting the hot extrusion section is an insulated and conditioned container representing the technical part of the line; here, too, are installed all the devices and electrical drives servicing the various motors and utilities that...

The Plastex extruders come with: • extrusion cylinders with special wearresistant centrifugal bimetallic surface • screws with special barrier properties – polyvalent ones and customized ones. These too are made of wear-resistant materials and those intended for the treatment of particularly aggressive materials are fully chromed • multi-zone heating/cooling systems with shielded ceramic heating elements for precise heat configuration according to the selected resins • digitally-controlled maintenance-free liquid-cooled AC motors The hydraulic sliding-plate filter units facilitate changeover...

1 2 3 4 5 6 Layout of chill roll for the production of polypropylene that can tend to form and solidify during the extrusion process. To obtain production of exceptional quality at the high speeds involved in the cast process, the product’s stability has to be ensured during the critical phase between it leaving the extrusion lip and the melt being deposited on the surface of the chill roll. A suction chamber extracts the fumes that are developed during the process and ensures the counter-pressure required to control correct exhaust evacuation during the quenching procor with sliding inserts,...

The typical output of a cast line demands a winding technology that is best suited to the required production. This involves not only the typical physical- mechanical properties for forming a well-produced reel that can then be successfully used for processing the film, but also important economic considerations also associated with product distribution. Macchi has devised its line of cast winders using three winding systems, contact, centre and centre-peripheral that can also be used in tandem according • winding quality for all products made directly into commercial reels There are three machine...

C automation, allow Macchi to provide industrial logistic solutions for managing the finished product ranging from the palletization of the finished reels to more complete product collection and boxing systems, all controlled by a dedicated PC to optimize the associated functions. Mandrel extraction clamp Mandrel extraction unit Winder inlet cutting knives and automatic trim recovery system

As previously noted, the electrical equipment is installed in a specially designed controls container that serves to optimize the space required for the control devices, as well as provide a controlled environment temperature for the control systems. The control system is based on the same approach to the distributed electronics, with serial communication centralized on the supervision system within the controls container which greatly reduces the risk of downtime due to complicated cabling and interconnections between the electrical and electronic boards and machine units. Macchi prides itself...

sor, dedicated to the product’s profile and management of the extrusion lip. A heavy emphasis is also, of course, put on the electronics and associated dedicated software for controlling the production transition, from the line’s acceleration and deceleration ramping to maintaining product quality control in the process, to management of potential faults or emergency situations. Gravimetric dosing system and loaders Thickness meter screen page Screen pages of EASY CONTROL® plus system menu

Il contenuto di questo catalogo serve solo a titolo informativo. Le specifiche tecniche e produttive garantite dipendono esclusivamente dagli accordi contrattuali. Rev.003-03/09 The cast film must inevitably be trimmed to remove those edges affected by neck-in process as well as the bleed trim process in some applications. Quantity-wise, the trim represents a considerable percentage of production and must be recovered in line by means of a closed loop circuit that will not cause contamination and allow the trim scrap material to be recovered and recycled back into the production process as soon...