Paint bucket or A-pillar finisher? In our thoughts and attribution of value, packaging items and high-tech components often represent opposites. Yet the two can complement one another – when you look at used packaging as a valuable raw material. At the fair, KraussMaffei will be showing the concept for a closed material cycle and is making plastics processing sustainable through this.

First a bucket or another plastic product, then raw material for further processing: the shredded post-industrial material

At the K, KraussMaffei Will Be Showing the Cycle from Product to Upcycling  to a New Product

Spritzgießen

Kunststoffverarbeitung: Verfahren

Messe K-Kunststoffmesse

kunststoffe-international.com

Smart Factory

Energieeffizienz

Steuern, Regeln

Software

Folientechnik (IMD, IML, FIM, u.a.)

Digitale Transformation

Wirtschaft

Innovationen und neue Technologie

Laserbeschriftung

Oberflächentechnik

Laserbearbeitungen

Rückverfolgbarkeit, Traceability

Qualitätsmanagement

Handling, Handhabungstechnik

Automatisierungstechnik

Nachhaltigkeit

Umweltmanagement

Zerkleinerungsmaschinen

Kunststoffverarbeitung: Maschinen und Komponenten

Greifer für die Kunststofftechnik

Spritzgießmaschinen

Kunststoff-Rezyklat

Kunststoff Werkstoffe

Compoundieren

Kunststoff-Aufbereitung

Today Packaging,  Tomorrow Raw Material

Over past months, many in-house workflows and development processes have slowed down and also changed. Nevertheless, time has not stood still, also not in injection molding technology. The debate and development have been shaped by two themes: digitalization and the circular economy. Below are some examples of developments and projects that underpin this trend.

Two displays are seamlessly integrated into the continuously 3D-formed instrument panel

Innovative Injection Molding in Times of Pandemic

Schaumspritzgießen

Künstliche Intelligenz für die Qualitätssicherung

Industrie 4.0

Industrie 4.0 für die Qualitätssicherung

Mehrkomponenten-Spritzgießen

Spritzgießwerkzeuge

Werkzeuge für die Kunststoffverarbeitung

Biokunststoffe

Spritzgieß-Sonderverfahren

Spritzgießsimulation

Simulation

Schnecken und Plastifiziersysteme

Industrie 4.0 für die Kunststoffverarbeitung

Machine Learning / Künstliche Intelligenz für die spanende Fertigung

Industrie 4.0 für die spanende Fertigung

Kunststoff-Recycling

Lasermarkieren

Inline- / Online-Messsysteme

Qualitätssicherung

Qualitätssicherung Kunststoff

Kreislaufwirtschaft

There Is More beyond the Horizon

Arburg has now packed numerous digital services into an app for smartphones and tablets. Among them: assistance in saving energy.

Via the customer portal, the individual apps – from the Arburg host computer system (ALS) to the ordering function – can also be operated using a smartphone.

16:9

Review of the Arburg Anniversary Days from March 8 to 11, 2023

Doriat, Clemens, Dr.

Hydraulik-Komponenten

Maschinenelemente

Elektrische Antriebe für Spritzgießmaschinen

Antriebe

Elektrische Antriebe

A Machine Park in the Pocket

Christian Schiller’s goal is to turn the phrase “plastic waste is recyclable material” into reality. His tool of choice: digitalization.

Recycling

Start up

Unternehmen und Unternehmer

Ehrhardt, Melanie

“We See Our Work as Basic  Digitalization“

In an online survey, representatives of the plastics industry formulated their expectations toward the Plastics Innovation Center 4.0 (PIC 4.0).

Wordcloud generated from the answers to the open question concerning the most important use cases for PIC 4.0

Part 5 of the Series: Practical Demonstrators for the Plastics Innovation Center 4.0

Messdatenerfassung und -verarbeitung

Prozessoptimierung

Prozessmanagement

Machine Learning

Datenanalyse

Focus on the User Benefit

The central control unit of the injection-molding machine is used by the machine operator for control, regulation and optimization of the entire production process. In order to directly integrate external systems as well as proprietary solutions that do not have a standardized interface, Engel uses a technology that is already widespread in day-to-day routine. Via a browser, the new Webviewer can be reliably integrated into the CC300 control panel of the injection-molding machines.

The Webviewer in the machine control system integrates not only ancillary equipment  with web interfaces, but also data from internal and external systems that are accessible via browsers. 

New Webviewer Merges Web and Control Applications

Steuerungen (Hardware und Software)

Bedienterminals

Computer Hardware

Central Control Unit Makes Use  of Web Technology

After the focus was on individual manufacturing and model-supported process set-up in recent years, the Institute for Plastics Processing (IKV) at RWTH Aachen University is linking the two aspects of digitalization and circular economy at K 2022.

The QR code on the PCR component provides project information and process data.

Werkzeuginnendrucksensoren

Messtechnik

Sensoren / Messwertaufnehmer

kunststoffe.de

Precise Process Control with Injectix

We look behind the cavity walls and along the data cable at what hot runner technology now offers in terms of mechanical, electronic and digital expertise.

The smart Control monitoring unit permits integrated monitoring of the injection molding production cell, including the mold, hot runner system and all ancillary components. The “Luer connector” application case was on show at K 2022.

State-of-the-Art Injection Molding Solutions at K 2022: Hot Runner Technology

Mikrospritzgießen

Normalien und Heißkanaltechnik

Komponenten für die Kunststoffverarbeitung

Mess-, Steuer- und Regelgeräte

Temperaturregler

Heißkanalsysteme

Additive Fertigung

Everything under Control

Phase-unifying cavity pressure control reduces process fluctuations, as shown by the example of post-consumer recyclate processing.

The PCR storage box was very popular with visitors.

Phase-Unifying Cavity Pressure Control for PCR Processing

Präzisionswaagen

Mechanische Messtechnik

Precise Process Control with InjectiX

Material and manufacturing process optimized, CO<sub>2</sub> saved: recycled wash cap from Pöppelmann K-Tech closes the loop.

Material and manufacturing process optimized, closed loop: Recycled wash cap for the automotive industry. 

Sustainable Wash Cap

The toolmaking industry of the future is facing significant changes in its range of services and its value creation processes. It is difficult to predict exactly how the collaboration of German tool manufacturers with series production will be structured in the future. However, it can be assumed that digital networking and sustainability will play a key role.

What the Two Trend Topics Mean for Collaboration between Toolmaking and Series Production

Werkzeug- und Formenbau

Dienstleistungen

Werkzeug-, Formen- und Modellbau

Vorbeugende Instandhaltung für die Qualitätssicherung

Ressourcenmanagement

Produktion

Toolmaking of the Future –  Digitalized and Sustainable

 At KraussMaffei’s booth, automotive door modules are produced from former caps of insulin pens. The system supplier is presenting not only the machine hardware necessary for this but also new digital solutions.

Digital solutions are an essential component of the material loop from the insulin pen cap to the car door module.

Medizinprodukte

Medizintechnik

From the Insulin Pen Cap to the Automotive Door Module

The IKV is researching digital solutions for better description and classification of recyclates. The aim is to increase the actual recyclate use rates. Results will be presented at the IKV colloquium in September.

PlasticBOND: Schematic illustration of the platform design to be developed.

Research to Improve Recyclate Use

The use of TPE materials with recycled content increases the sustainability of vehicles. They are also used more and more in the interior.

The selection of high-quality recyclate enables their use in demanding automotive applications.  

Recyclate Reduce the CO2 Footprint in Seals and Interior Applications

Thermoplastische Elastomere

Thermoplaste

Soft, Elastic and Recycled

Automakers have formulated ambitious plans for their vehicles. We discussed this topic with Frank Schumann from Trinseo.

Batterien

Energiespeicherung

Elektromobilität

Mobilität

Lichttechnik

“Nothing Speaks against the Use of Recyclates for Demanding Components”

Preview of K 2022: Kunststoffe Questionnaire on the Situation in Injection Molding Machine Construction

Time to take stock: in what condition and with what agenda is the industry presenting itself after two-and-a-half years of a difficult climate? We have conducted a survey: insights into the dominant themes of the age.

The plastics world stands transfixed by its high mass in October: the K 2022 in Düsseldorf, Germany. The masters of ceremony of European injection molding machine manufacturing traditionally have a presence here, with a particularly high rate of innovation. Time to take stock: in what condition and with what agenda is the industry presenting itself after two-and-a-half years of a difficult climate? We have conducted a survey: insights into the dominant themes of the age.

There’s no getting around K 2022. All the participants in the current Kunststoffe questionnaire are agreed. However, this only represents the exhibitors’ points of view. First, the companies are under no illusions that the trade show might take place unaffected by the Covid pandemic. “That is a utopian vision for me. We have had to deal with harsh realities for two years, and a reinvigoration of the pandemic in October is unfortunately very realistic,” said Gerd Liebig, CEO of Sumitomo (SHI) Demag.

Michael Wittmann, Managing Partner of the Wittmann Group added: “The Corona virus will not do us this favor. However, as things stand at present, we can’t foresee how K 2022 will take place as regards hygiene and safety measures. Fakuma 2021 showed impressively that a trade show can offer visitors and exhibitors added value even in times of pandemic and that no video conference in the world is a replacement for a personal visit and first-hand experiencing of machines and equipment.” Klaus Geimer, Deputy Managing Director of Dr. Boy, added: “If global visitor numbers only decline slightly compared to K 2019, and we have such a positive discussion and investment climate as at Fakuma 2021, we can be more than satisfied.”

How Much Is the Covid Pandemic Influencing the Trade Show Planning?

It seems that the companies have factored reduced visitor numbers into their trade show planning. “I’m assuming that fewer visitors will come, especially from Asia, than we have been used to in the past. However, the number of visitors has no influence on our trade show planning,” explained Dr. Michael Ruf, CEO of KraussMaffei. Gerhard Böhm, Managing Director for Sales and Service at Arburg, backs this up: “Our trade show planning will not be affected by this, quite the opposite. Our presence at K 2022 will be bigger than ever.” And Michael Wittmann, too, is making an announcement: “The Wittmann Group will be represented at K 2022 with the biggest booths ever. However, we are calculating in house that the number of visitors will only be about 70 percent of the K 2019 level.”

Dr. Gerhard Dimmler, CTO of the Engel Group assessed the situation similarly: “It is likely that fewer customers will be able to travel from China to Düsseldorf. But we are planning for the K show to take place as we know it, and we look forward to many discussions with international trade show visitors.” Gerd Liebig, too, expects that Chinese and intercontinental visitors will stay away because of the pandemic. “However, this will not affect our trade show planning; after all, the plastics world is looking for answers that will result from changing market conditions – the key words here are: sustainability, recycling and multi sourcing.”

What Marks Has the Corona Virus Left on Companies?

The pandemic has definitively also left marks on companies, not only on workflows. As a new dimension of the work routine, concern about employees’ health is explicitly mentioned. Michael Ruf described the situation in early 2020 as follows: “Like many other companies, we at KraussMaffei also had to play it by ear from the first day of the first lockdown. We intensified communication, developed hygiene concepts, initiated home office solutions, acquired masks and self tests and distributed them to our staff, and later conducted multi-stage vaccination campaigns. With this crisis management, we managed to maintain our production and continue to supply our customers.”

All the participating companies set up home-office working – in the departments where this was possible. However, the actual effectiveness of this measure can only be assessed after a long phase in a “post-Corona work environment,” summarized Michael Wittmann.

But many companies have made a virtue out of necessity and also gained positive insights from this crisis. Less surprisingly, there is one area, in particular, that is affected by this: “Digitalization has progressed faster than would probably be the case without the pandemic, particularly in communication. Virtual discussions and even virtual machine acceptance tests have become a matter of course. Demand for online support and remote maintenance has risen, since our customers have recognized that they can use them to safeguard their productivity and delivery capability even in the event of future crises,” said Gerhard Dimmler. “What we have also learned in the last two years is how important personal contacts are and will remain. The digital possibilities open up big opportunities for more efficiency as well as higher productivity and competitiveness, not as a replacement for but as a complement to the traditional forms of cooperation.”

Gerhard Böhm is in agreement – and sees this confirmed elsewhere. “It is correct that digitalization cannot replace personal contact one-to-one. Our maxim has always been only to use digital tools and formats where they offer genuine added value. But the years marked by the Covid pandemic have confirmed once again that our strategy of manufacturing at a centralized site is absolutely correct.” Klaus Geimer covers a wider scope: In 2019 the industry emerged from an “age hostile to plastics” and in 2020 slid into a completely unpredictable pandemic, characterized internally by staggered working hours for different teams and externally by a significant decline in investment. “From fall 2020, it all turned into an unexpected long-term boom, that is still going on,” said Geimer. But the crisis mode remains: “We have a situation in which we are having to deal with material scarcities, galloping prices and a deficit of technical staff.”

Michael Wittmann added: “Actually, the economic marks left by the pandemic were manageable until the end of last year. The indirect consequences of the pandemic have only emerged this year. The massive disruptions in supply chains and logistics are causing delays in production, and consequently lower sales revenue.”

One Machine Every Nine-and-a-Half Minutes

The companies’ revenue charts show a V-shaped curve in most cases, even though differently shaped. Up to a certain degree, this reflects the importance of the automotive business for individual manufacturers. However, it cannot be seen as more than a trend, since the figures are hardly comparable. Thus, the sales of the Wittmann Group also include a large proportion of the robotics and ancillaries equipment business, and at Arburg, a small portion of the “additive manufacturing” segment. And since its IPO on the Shanghai Stock Exchange, KraussMaffei Company Ltd. has been a conglomerate, consisting of the KraussMaffei Group (incl. Netstal), the TianHua Chemistry Machinery and Automation Research Institute Co., Ltd. and Fujian Tianhua Intelligent Equipment Co., Ltd. The KraussMaffei Group in turn, which earns around 80 % of the revenue of the stock market-listed holding, earns its cash not only with injection molding machines (approximately half), but also with extrusion and reaction technology.

The undisputed industry leader according to sales and volume is the Chinese injection molding machine manufacturer Haitian, which withdrew its agreement to take part in this questionnaire at short notice. Unlike its competitors, Haitian’s recovery set in earlier and with more verve. In the past business year, sales by the Group were EUR 2.2 billion, corresponding to a rise of almost 36 % compared to the previous year. In this period, only Engel achieved such a leap, though they had lost ground a year earlier. Another surprising fact: according to its own information, Haitian sold over 56,000 injection molding machines in 2021 (over 10,000 abroad for the first time), corresponding to one machine every nine-and-a-half minutes – a historic record for the entire industry.

Are There Differences in the Main Themes for the Trade Show Presence?

A finding from recent years is also that the plastics industry – not just mechanical engineering – is increasing coming under pressure to justify itself. Good balance sheet figures are no longer enough; society demands answers to urgent problems. The focuses of the organizer and ideational sponsor of the trade show, and the exhibitors are therefore set correspondingly.

According to Michael Wittmann, “The focuses of our product presentations go hand in hand with the trade show themes of sustainability, digitalization and the circular economy. We have a modern and very energy-efficient product portfolio and want to present the advantages for the user even better. As a striking representation of energy saving potentials, our machines, and for the most part the ancillary equipment and robots, too, are connected to our Imagoxt measurement system. This provides unfiltered consumption data, detailed information on energy distribution and long-term trends.” In addition, new functions of the HiQ Flow and HiQ Melt assistance systems will be presented, which make an important contribution to the circular economy. From the field of digitalization and future operating systems, the HoloVoice system, a combination of voice and gesture control, as well as production-related “Mixed Reality” applications will be presented.

At Engel, the topics are slightly varied. “Energy efficiency has shifted back into our customers’ focus again, and much more strongly, due to the steep rise in energy and material prices. Demand for all-electric machines is rising. Those who think they are already taking advantage of the full energy saving potential will be surprised at the Engel booth. With a smart cooling solution in combination with digital products, far more becomes possible,” said Gerhard Dimmler. Digitalization is a pioneer for both higher energy efficiency and greater sustainability. With intelligent assistance systems permitting uniformly high product quality, even with fluctuations in the raw material, recyclate can also be used for high-quality products. This would be a prerequisite for closing material loops.

Dr. Boy intends to demonstrate the complex of digitalization and automation by connecting the machine, handling and ancillary equipment to a host computer. For climate protection, the small machine manufacturer refers to the compactness and the small carbon footprint of its injection molding machines. According to Boy, the energy consumption can be displayed and optimized for each partial cycle step. This is supported by a new screen page for a digital water-flow meter. Klaus Geimer added a special aspect: “For environmental protection, we place most importance on avoiding or reducing production wastes. For this, we are showing our small-machine concept, where the nozzle is in direct contact with the part to be molded without a sprue being produced. Alternatively, we offer sprueless nozzles across the entire delivery program.” For processing recyclate, they are presenting an example of the reuse of fishing nets from marine litter.

Arburg is not only dedicating itself to the themes of digitalization and resource conservation on its own booth, explained Gerhard Böhm. “We will also present our “arburgGreenworld” in the VDMA Circular Economy Forum – in a very unusual manner.” Gerd Liebig is somewhat more concrete: “Our visitors can look forward to a large number of innovations about the above-mentioned topics. Thus, we are showing a world innovation in the field of all-electric machines, a fully automated and highly efficient production cell for medical parts, but also individual solutions for automation and digital process monitoring – to name just a few highlights.”

Michael Ruf, on the other hand, is more reserved: “Our main topics are sustainability, digitalization and new technologies. However, we won’t reveal how we address and present them until K. Otherwise it wouldn’t be a surprise.” Although one surprise has already been leaked: KraussMaffei will present a coup on additive manufacturing, and thereby open up a new business field.

How Are We Progressing with the Circular Economy?

Since the topic of the circular economy first came to the fore at K 2019, the political and social pressures to achieve higher recycling quotas have increased. Current events such as the war in Ukraine and the forerunners of the climate crisis are also contributing to a different assessment of how to manage limited resources, and our dependency on them. Many companies are working on solutions to close previous gaps in the sought-after circular economy, and limit the consumption of virgin material.

Gerhard Dimmler sees a risk here: “In view of current challenges, these topics must not be minimized. Ultimately, the circular economy contributes to combating the energy crisis. The aim of treating plastic wastes is to consume less energy than is necessary for manufacturing virgin material.” Reducing the carbon footprint is not a purely technical challenge; rather, it requires close cooperation along the value chain. “This is a matter of information transparency, circulation of information, so to speak. The R-Cycle initiative, which Engel joined in spring 2022, pursues precisely this goal. With digital product passports, R-Cycle creates the basis for a high-quality recycling process by automatically gathering recycling-relevant information during product manufacturing. It is important for us to include consumers from the start in the cycle of information. A great deal of clarification is necessary here, particularly with the topic of packaging,” said Dimmler.

For Gerhard Böhm, there is an important point here: “We machine makers are not the problem, we are a part of the solution as we show the technical possibilities and the resulting business models. Our activities concerning ‘arburgGreenworld’ include both the stable processing of recyclates and solutions for reliably identifying, sorting and recycling post-consumer plastic products, and returning them to the material cycle.”

To use plastic wastes more intensively in the material cycle, the machine manufacturers not only offer the necessary hardware but also a wide portfolio of digital solutions. KraussMaffei makes the same point: “In the past three decades, over a million metric tons of high-quality recyclate have been brought back into circulation thanks to our solutions,” said Michael Ruf. “An example of this: global demand for disposable articles, mainly in the health care sector, is huge, and the products are often only used briefly and not very contaminated. Ideal prerequisites therefore for using them afterwards as raw materials for parts with a longer lifetime. At K 2022, we are presenting technical solutions for this cycle.”

Besides the technical side, there is also a political aspect to this issue. “We reach a limit where the outlay for recycling is more expensive than the manufacture of virgin material. From my point of view this will not be possible without state intervention in the cost structures,” said Klaus Geimer. And Gerhard Dimmler notes: “Technologically, there are no limits to the material cycle. However, it is important that each individual step be economical within the process as a whole. Otherwise the process chain cannot function unbroken. Without economy, there is no ecology.”

“In principle, the processor needs financial incentives to switchover to such materials. The difficulty is, for recycled, as well as compostable, parts, to obtain a part quality comparable to that of virgin material. Everyone involved in the process chain must meet this challenge and solve it jointly,” Gerd Liebig explained, and continued: “As far as we are concerned, we continuously improve our machine control systems and are currently working on a new digital platform that will create data transparency and form the basis for new solutions. This will be presented in more detail at K.”

 Virgin Material Only to Compensate for Shrinkage and Increased Demand

Only the circular economy permits long-term economic growth together with minimization of resource consumption, stresses Michael Wittmann. “That is especially important for Europe, where the extraction of raw materials is limited or encounters societal resistance. Materials must be recirculated as often as possible to limit the use of new raw materials to the inevitable depletion and increased demands. We recognized the importance of this theme at an early stage – for example all our products support the processing, conveying, drying and dosing of regrind.”

As a special variant, Wittmann offers the Ingrinder. This is the compact integration of a G-Max blade granulator or an S-Max screenless granulator into the injection molding machine. Sprues are immediately reground and fed back to the process. With the controlled feed of regrind to virgin material, the Gravimax gravimetric metering unit is also used. “Regrind places particular demands on conveying equipment, since it often contains more dust, which must be removed appropriately. Our Feedmax centralized conveyors will be extended at K with a corresponding model with high dust-removal performance,” said Wittmann.

Which Concrete (Digital) Solutions Are Ready for the Market?

There are numerous approaches for reducing the consumption of virgin material. “It begins with the product design and the choice of an efficient manufacturing process. It is then a matter of achieving acceptable parts as fast as possible during production, and keeping rejects as low as possible. In this context, I would like to highlight the assistants of our Gestica control system, which can be used, e.g., to reduce the setting times and optimize the cycle sequence, as well as optimize the energy efficiency,” sums up Gerhard Böhm. Manufacturing injection molded parts from recyclates is challenging because of the growing bandwidth of the materials and their batches, their different origins and treatment as well as their processing behavior. However, this is not a problem for an appropriately equipped machine – Arburg offers a recyclate package with special software and hardware features for this purpose.

Other manufacturers, for example Engel, KraussMaffei and Wittmann, have comparable solutions in their program – like Arburg not only since yesterday, but the desired plastics cycle gives them a new importance. Since, in order to really close the material loops, according to Gerhard Dimmler, “we must end the currently practiced downcycling and achieve a genuine recycling or upcycling.” This includes, in conjunction with a plasticizing system adapted to the particular material, intelligent assistance systems, be they called iQ weight control, APC plus or HiQ Flow, which identify viscosity fluctuations in the raw material and automatically compensate it in the same cycle.

With one restriction: “Even if the assistance system were able to compensate for very large fluctuations in the quality of the recyclate, it will still be in the interest of the processor, to leave the adjustments of the control parameters within a defined range for critical injection molded parts. It will never be possible to take recyclate that is largely of inferior quality and use it to manufacture mechanical load-bearing parts,” is how Michael Wittmann puts it in a nutshell. “Too much, or inferior, recyclate should be qualified as reject by limiting the control parameters, even if it can be compensated via the process technology.”

Raw Materials Sources and  Design Guidelines

Which brings us to the raw materials source. Setting up a value creation chain for the circular economy with uniform feedstock quality would be to the benefit of everyone involved, stresses Michael Ruf. He refers to a flagship project of efficient recycling that is currently being created in the USA: “The recycling company has a regular supply of large quantities of carpet waste from PP composite material. These high-quality traceable wastes are the backbone of a recycling value chain, which is more effective and more profitable than processing of virgin materials.”

Another example: PET has so far been the only packaging plastic that, as a recycled material, can be processed back into food packaging on an industrial scale. At K, Engel, is presenting the first manufacture of thin-walled containers from rPET on an injection molding machine. Gerhard Dimmler: “That is a world’s first. Only the newly developed high-performance injection unit of the e-speed machine allows PET to be processed by thin-wall injection molding in only one step.” Beyond the bottle-to-bottle cycle, it is now conceivable to establish a bottle-to-cup or even cup-to-bottle recycling. This shows that, besides digitalization, machine and technology innovations continue to play a big role.

Advances in this area are particularly important, since “Packaging and short-lived consumer goods now have the biggest and fastest material loop. A rapid effect can be achieved here, since the products are quickly available again after a short use phase. A key demand lies in the sorting of the material streams – there are a large number of initiatives underway to improve sortability using new identification methods,” said Gerd Liebig.

The automotive and electronics industries, for example, have entirely different prerequisites. In this case, it is a matter of developing and implementing new design guidelines that would simplify separation of the materials at the end of the product‘s life cycle. According to Liebig, “The life cycles of these products are significantly longer, to that the material loop needs to be longer in order to gain momentum – the requirements are, in addition, far greater, since the recyclates must also have a high long-term stability.” Gerhard Böhm agrees, “It is important not to over-fulfill the requirements for the respective product in the selection of plastic and the part design, since that is usually to the detriment of recycling.”

In principle, the industry faces the technical challenge of making recyclate also fit for high-quality parts. “The quality standards for food-grade packaging applications and the adequate and constant sourcing of recyclates from qualified sources remains a critical parameter for the present,” said Michael Wittmann. To use lower-purity recyclates, points out Michael Ruf, it is at least still possible to embed them completely in virgin material using a process technology such as coinjection.

And KraussMaffei is already in the happy position of being able to cover a wide range of this growth market. Extrusion technology, the biggest field after injection molding, already deals with the process steps plasticizing and degassing, as well as regranulation and recompounding. “The biggest advantages offered by KraussMaffei are the different plant concepts for thermomechanical, solvent-based or chemical recycling. Depending on the requirement, we can execute them as stand-alone or cascade solutions,” according to Ruf. “Another benefit is the system solution comprising single- and twin-screw extruder especially for solvent-based plastics recycling. KraussMaffei is the only manufacturer in the world to offer this combination as a one-stop solution.