ABOUT THE AUTHOR: John Bozzelli is the founder of Injection Molding Solutions (Scientific Molding) in Midland, Mich., a provider of training and consulting services to injection molders, including LIMS, and other specialties. Contact john@scientificmolding.com.

Successfully starting or restarting an injection molding machine is less about ticking boxes on a rote checklist and more about individually assessing each processing scenario and its unique variables.

Additive technology creates air pockets in film during orientation, cutting down on the amount of resin needed while boosting opacity, mechanical properties and recyclability.

Medical device manufacturers are tasked with developing elaborate test protocols to ensure that the product in development is safe and meets essential requirements. If these tests are conducted late in the development process, the more onerous and risky they become. SPT Vilecon often works with silicone, a material that is extensively used in medical applications because of its chemical resistance, mechanical performance, and biocompatibility. However, silicone parts are notoriously difficult to prototype and test, since most grades need to be injection molded to achieve their full performance potential, said the company. FIM enabled SPT Vilecon to offer an alternative to a customer developing an intravenous (IV) silicone product — the use of 3D-printed tooling to perform early design and material verification at a fraction of the cost of conventional methods.

Join Engel in exploring the future of battery molding technology. Discover advancements in thermoplastic composites for battery housings, innovative automation solutions and the latest in large-tonnage equipment designed for e-mobility — all with a focus on cost-efficient solutions. Agenda: Learn about cutting-edge thermoplastic composites for durable, sustainable and cost-efficient battery housings Explore advanced automation concepts for efficient and scalable production See the latest large-tonnage equipment and technology innovations for e-mobility solutions

Editor in chief of PlasticsToday since 2015, Norbert Sparrow has more than 30 years of editorial experience in business-to-business media. He studied journalism at the Centre Universitaire d'Etudes du Journalisme in Strasbourg, France, where he earned a master's degree.

Introduced by Zeiger and Spark Industries at the PTXPO, the nozzle is designed for maximum heat transfer and uniformity with a continuous taper for self cleaning.

The patented FIM process uses high-speed Nexa3D printers and xMOLD resin to print injection molding tools that are compatible with thousands of off-the-shelf injection molding materials, including reinforced high-performance feedstocks. The process reduces design, iteration, and validation cycles using end-product materials to a matter of hours rather than weeks.

SPT Vilecon said it has begun expanding the range of injection mold prototyping with silicone, metal, and ceramic materials to provide medical device manufacturers with an even wider selection of product development and verification services.

Multiple speakers at Molding 2023 will address the ways simulation can impact material substitution decisions, process profitability and simplification of mold design.

Based on input collected from the first two iterations, the design of the silicone part was approved and manufacturing of a metal tool was initiated with full confidence of part moldability and performance. The in-house tool shop built the final metal tooling in four weeks without iterations.

Processors with sustainability goals or mandates have a number of ways to reach their goals. Biopolymers are among them.

August 29-30 in Minneapolis all things injection molding and moldmaking will be happening at the Hyatt Regency — check out who’s speaking on what topics today.

Exhibitors and presenters at the plastics show emphasized 3D printing as a complement and aid to more traditional production processes.

SPT implemented Nexa3D’s Freeform Injection Molding (FIM) technology to help customers shorten time-to-market on complex medical devices in demanding medical-grade materials and to expand on the range of materials that can be quickly and reliably used in prototyping and early device test manufacturing.

To illustrate this effect, let us review a common issue on the shop floor: short shots. It is not unusual for a process to be running fine, and then when a new color or lot or some other change in the system occurs, the result is periodic short shots. As my November column noted, some processors may decide to raise the melt temperature to fix the shorts. To speed this along,

While the melting process does not provide perfect mixing, this study shows that mixing is indeed initiated during melting.

It may seem as though raising backpressure increases temperature because the short shots stop. The rationale here is that the higher temperature lower the viscosity, making the short shots disappear. But that’s not the case. Yes, the parts are full, but not because of an increase in melt temperature or lower viscosity, but because more plastic is packed (at higher density) into the same shot size (see illustration p. 36). If density is higher, there is more plastic in the same volume or shot size. It is not a temperature  effect but a density change that provides more plastic in the same shot volume. The shot size changes without any change of screw position.

Mixed in among thought leaders from leading suppliers to injection molders and mold makers at the 2023 Molding and MoldMaking conferences will be molders and toolmakers themselves.

Five industry pros with more than 200 years of combined molding experience provide step-by-step best practices on mounting a mold in a horizontal injection molding machine.

Join this webinar to explore the transformative benefits of retrofitting your existing injection molding machines (IMMs). Engel will guide you through upgrading your equipment to enhance monitoring, control and adaptability — all while integrating digital technologies. You'll learn about the latest trends in IMM retrofitting (including Euromap interfaces and plasticizing retrofits) and discover how to future-proof your machines for a competitive edge. With insights from industry experts, it'll walk you through the decision-making process, ensuring you make informed choices that drive your business forward. Agenda: Maximize the value of your current IMMs through strategic retrofitting Learn how to integrate digital technologies to enhance monitoring and control Explore the benefits of Euromap interfaces and plasticizing retrofits Understand how retrofitting can help meet new product demands and improve adaptability Discover how Engel can support your retrofitting needs, from free consultations to execution

While prices moved up for three of the five commodity resins, there was potential for a flat trajectory for the rest of the third quarter.

The 3D-printed molds for the first and second iterations cost less than €2,000 combined. And the technology enabled a two-day design cycle, which is more than 90% faster than conventional metal tooling.

This overpressurizes the cavity, which in turn wears the parting line, which eventually results in flash. Now you have an even bigger problem. Bottom line: always think things through. Whenever you change a process parameter ask yourself four questions:

Across all process types, sustainability was a big theme at NPE2024. But there was plenty to see in automation and artificial intelligence as well.

How does backpressure control shot size, and what does a change in backpressure change in your molding process? Processing is not just about understanding the machine; a good processor knows how plastics behave. In this case, they have to understand that molten plastic is compressible. For example, room-temperature or solid density for HDPE is 0.957 g/cc, while its melt density is 0.759 g/cc, or less than 80% of its solid density. This means the polymer molecules are farther apart from one another in the molten state, and at typical backpressures the molten HDPE can be compressed. Typical backpressures (plastic not hydraulic pressures) for most resins are in the range of 300 psi to about 1500 psi (20-103 bar). These pressures do compress the melt.

Formnext Chicago is an industrial additive manufacturing expo taking place April 8-10, 2025 at McCormick Place in Chicago, Illinois. Formnext Chicago is the second in a series of Formnext events in the U.S. being produced by Mesago Messe Frankfurt, AMT – The Association For Manufacturing Technology, and Gardner Business Media (our publisher).

Plastics Technology’s Tech Days is back! Every Tuesday in October, a series of five online presentations will be given by industry supplier around the following topics:  Injection Molding — New Technologies, Efficiencies Film Extrusion — New Technologies, Efficiencies Upstream/Downstream Operations Injection Molding — Sustainability Extrusion — Compounding Coming out of NPE2024, PT identified a variety of topics, technologies and trends that are driving and shaping the evolution of plastic products manufacturing — from recycling/recyclability and energy optimization to AI-based process control and automation implementation. PT Tech Days is designed to provide a robust, curated, accessible platform through which plastics professionals can explore these trends, have direct access to subject-matter experts and develop strategies for applying solutions in their operations.

In this collection of content, we provide expert advice on welding from some of the leading authorities in the field, with tips on such matters as controls, as well as insights on how to solve common problems in welding.

After successfully introducing a combined conference for moldmakers and injection molders in 2022, Plastics Technology and MoldMaking Technology are once again joining forces for a tooling/molding two-for-one.

Core Technology Molding turned to Mold-Masters E-Multi auxiliary injection unit to help it win a job and dramatically change its process.

The aim of this presentation is to guide you through the factors and the numbers that will help you determine if a robot is a smart investment for your application. Agenda:  Why are you considering automation? What problems are you trying to solve? How and why automation can help Crunch the numbers and determine the ROI

Dubious? Then check it out for yourself. The proper procedure for a change in backpressure is to take off second-stage pack and hold, change the backpressure, then note how full the cavity is. Most likely you will need to re-establish the same fill volume for the parts by hanging the cutoff position. This is critical if you want apples-to-apples comparisons for DOEs. Why? In the example above, you have what you wanted, full parts. The problem is that you changed the shot size and now that extra material put in during first-stage fill may be packing out the part in that first stage.

This month’s resin pricing report includes PT’s quarterly check-in on select engineering resins, including nylon 6 and 66.

Robust and valid prototyping and verification are key to minimizing cost, time, and risk factors in developing medical devices, said SPI Vilecon. FIM is a new toolbox for medical device companies seeking to accelerate their innovation and obtain early verification of part performance and moldability, added the company.

A supplier of development and manufacturing services to medical device OEMs used Freeform Injection Molding from Nexa3D to accelerate time-to-market and slash prototyping costs for a complex silicone-based IV device. SPT Vilecon explained the process in a recent press release.

Improvements in nozzle design in recent years overcome some of the limitations of previous filter, mixing, and shut-off nozzles.

When, how, what and why to automate — leading robotics suppliers and forward-thinking moldmakers will share their insights on automating manufacturing at collocated event.

Gifted with extraordinary technical know how and an authoritative yet plain English writing style, in this collection of articles Fattori offers his insights on a variety of molding-related topics that are bound to make your days on the production floor go a little bit better.

It’s a classic confusion between cause and effect. Melt temperature rises when screw speed is increased. Check out this data.

Join Wittmann for an engaging webinar on the transformative impact of manufacturing execution systems (MES) in the plastic injection molding industry. Discover how MES enhances production efficiency, quality control and real-time monitoring while also reducing downtime. It will explore the integration of MES with existing systems, emphasizing compliance and traceability for automotive and medical sectors. Learn about the latest advancements in IoT and AI technologies and how they drive innovation and continuous improvement in MES. Agenda: Overview of MES benefits What is MES? Definition, role and brief history Historical perspective and evolution Longevity and analytics Connectivity: importance, standards and integration Advantages of MES: efficiency, real-time data, traceability and cost savings Emerging technologies: IoT and AI in MES

Plastics Technology covers technical and business Information for Plastics Processors in Injection Molding, Extrusion, Blow Molding, Plastic Additives, Compounding, Plastic Materials, and Resin Pricing. About Us

Take a deep dive into all of the various aspects of part quoting to ensure you’ve got all the bases—as in costs—covered before preparing your customer’s quote for services.

Across the show, sustainability ruled in new materials technology, from polyolefins and engineering resins to biobased materials.

Resin drying is a crucial, but often-misunderstood area. This collection includes details on why and what you need to dry, how to specify a dryer, and best practices.

Thousands of people visit our Supplier Guide every day to source equipment and materials. Get in front of them with a free company profile.

While prices moved up for three of the five commodity resins, there was potential for a flat trajectory for the rest of the third quarter.

A processor has vast trove of processing “handles” available on today’s injection molding machines. Often they seem simple enough, especially if you change one machine parameter at a time. The problem is that when you change one setting on the machine controller it often influences two or more different process conditions.

Learn about sustainable scrap reprocessing—this resource offers a deep dive into everything from granulator types and options, to service tips, videos and technical articles.

Sustainability continues to dominate new additives technology, but upping performance is also evident. Most of the new additives have been targeted to commodity resins and particularly polyolefins.

Design input collected from the first tests was integrated in a second iteration that took only a couple of hours to complete. By contrast, conventional metal tooling would have taken more than six weeks to design and procure, and the adjustments needed for the second iteration would have taken an in-house tool-shop a week to complete.

Certified to ISO 13485, Denmark-based SPT Vilecon describes itself as a fully integrated provider of development and manufacturing services to the medical device industry. It offers in-house tool making and injection molding along with other manufacturing services to companies in northern Europe.

In this three-part collection, veteran molder and moldmaker Jim Fattori brings to bear his 40+ years of on-the-job experience and provides molders his “from the trenches” perspective on on the why, where and how of venting injection molds. Take the trial-and-error out of the molding venting process.

Performing fundamental maintenance inspections frequently assures press longevity and process stability. Here’s a checklist to help you stay on top of seven key systems.

Injection-molded silicone parts were produced within two days, allowing early verification of key design and performance aspects.

In this collection of articles, two of the industry’s foremost authorities on screw design — Jim Frankand and Mark Spalding — offer their sage advice on screw design...what works, what doesn’t, and what to look for when things start going wrong.

Discover how artifical intelligence is revolutionizing plastics processing. Hear from industry experts on the future impact of AI on your operations and envision a fully interconnected plant.

In a previous column discussing backpressure and its influence on temperature (Nov. ’17), I left out an important process change. A former student of mine, Seng Lo of Hellerman Tyton Americas, emailed me to point this out. Worse yet, it was not included in the list of “why we need backpressure” that was published in that issue.

The Plastics Industry Association (PLASTICS) has released final figures for NPE2024: The Plastics Show (May 6-10; Orlando) that officially make it the largest ever NPE in several key metrics.

Freeform Injection Molding technology from Nexa3D compresses design, iteration, and validation cycle times into a matter of hours rather than weeks.

This Knowledge Center provides an overview of the considerations needed to understand the purchase, operation, and maintenance of a process cooling system.

Crusty (my fictitious grumpy old processor) adds a bit more backpressure to get the temperature to increase faster. That is, before he or she read my previous article, which provided data that proved backpressure does not increase melt temperature.

In a time where sustainability is no longer just a buzzword, the food and beverage packaging industry is required to be at the forefront of this innovation. By adopting circular packaging processes and solutions, producers can meet regulatory requirements while also satisfying consumer demand and enhancing brand reputation. Join Husky to learn more about the broader implications of the circular economy — as well as how leading brands are leveraging this opportunity to reduce costs, increase design flexibility and boost product differentiation. Agenda: The cost and operational benefits of embracing circularity Key materials in circular packaging — including rPET and emerging bioplastics How to design a circular food and beverage package Strategies for selecting sustainable closures to future-proof packaging solutions Optimization and streamlining of production processes for enhanced efficiency How Husky Technologies can enable your sustainable success

Say “manufacturing automation” and thoughts immediately go to the shop floor and specialized production equipment, robotics and material handling systems. But there is another realm of possible automation — the front office.

While the major correction in PP prices was finally underway, generally stable pricing was anticipated for the other four commodity resins.

Second quarter started with price hikes in PE and the four volume engineering resins, but relatively stable pricing was largely expected by the quarter’s end.

Join KraussMaffei for an insightful webinar designed for industry professionals, engineers and anyone interested in the manufacturing processes of PVC pipes. This session will provide a comprehensive understanding of the technology behind the production of high-quality PVC pipes: from raw material preparation to final product testing. Agenda: Introduction to PVC extrusion: overview of the basic principles of PVC pipe extrusion — including the process of melting and shaping PVC resin into pipe forms Equipment and machinery: detailed explanation of the key equipment involved — such as extruders, dies and cooling systems — and their roles in the extrusion process Process parameters: insight into the critical process parameters like temperature, pressure and cooling rates that influence the quality and consistency of the final PVC pipes Energy efficiency: examination of ways to save material and energy use when extruding PVC pipe products

Ultradent's entry of its Umbrella cheek retractor took home the awards for Technical Sophistication and Achievement in Economics and Efficiency at PTXPO.

In this collection, which is part one of a series representing some of John’s finest work, we present you with five articles that we think you will refer to time and again as you look to solve problems, cut cycle times and improve the quality of the parts you mold.

Mold maintenance is critical, and with this collection of content we’ve bundled some of the very best advice we’ve published on repairing, maintaining, evaluating and even hanging molds on injection molding machines.

Despite price increase nominations going into second quarter, it appeared there was potential for generally flat pricing with the exception of a major downward correction for PP.

technotrans says climate protection, energy efficiency and customization will be key discussion topics at PTXPO as it displays its protemp flow 6 ultrasonic eco and the teco cs 90t 9.1 TCUs.

Mike Sepe has authored more than 25 ANTEC papers and more than 250 articles illustrating the importance of this interdisciplanary approach. In this collection, we present some of his best work during the years he has been contributing for Plastics Technology Magazine.