26. Advance the moving platen up against the back of the mold. a. Look and listen for the knockout rods binding or bending.

Asaclean® Purging Compounds are engineered to tackle your hardest processing challenges and make an incredible difference in your process efficiency.

36. Wipe off any dirt or grease you may have deposited on the machine and clear the area of your tools and equipment. If you want to maintain a clean work environment, lead by example.

AIM Processing has parlayed small part molding expertise and aggressive automation, even for short run production, into a highly successful custom molding business.

More than four years on, there are aspects of the COVID-19 pandemic that linger in their impacts to the plastics market and are made visible in our annual survey.

Before digging in, take note: No single procedure is correct for all applications. This procedure most likely will need to be modified to suit your special/unique situation or conditions. Also note that for safety reasons, the general procedure outlined here requires the pump to be turned on and off repeatedly. This and all other applicable safety requirements must be observed.

One of the most common defects in Injection Molding is the short shot.  I remember many times that I was called to a machine to diagnose a short shot in the production run.  At the time I worked in high cavitation thin-walled molding and short shots and flash were the 2 critical defects we had to really keep an eye out for in that production environment.

34. Install the hex nuts or socket-head cap screws on the end of the knockout rods with a ratcheting socket wrench or other suitable tool until they are tight.

a. Grade 8 bolts should engage the relatively soft die-cast platens by a minimum of 1.5 times their diameter to prevent stripping he threads. Two times their diameter is preferred (see Table 1). b. Ideally, the mold clamp should be square with the mold and the toe of the clamp be fully engaged in the slot.

a. You can make sure the locating ring remains engaged in the platen alignment hole by occasionally looking at it from the barrel side.

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.

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.

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

Piotr Witaszek is the plant manager for LMT-Mercer Group, Inc., a custom injection molder with multiple facilities. He has 25 years of injection molding experience, starting out as a machine operator. Contact pwitasek@lmtproducts.com.

Ernie Di Siro is the Molding Manager for Nordson EFD LLC, a proprietary injection molder. He has 40 years of injection molding experience – starting out as a machine operator. Contact ernie.disiro@nordsonefd.com

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.

Our in-depth guide tells you everything you need to know about purging compounds. We want to give you the tools you need to make the best decision for your processing needs..

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.

Jeremy Cooley is an Asaclean Technical Service Representative & Purging Expert living in South Carolina. He's worked in injection molding & purging for over 15 years, and frequently presents at national plastics trade shows and conferences.

This CW Tech Days virtual event will explore the technologies, materials and strategies used by composites manufacturers working in the evolving space market. Presentations from industry experts will emphasize the use of composite materials in applications requiring the weight savings, structural benefits and ability to withstand extreme temperatures that only composites can provide.

With over 2,000 current customers and a combined 200+ years of processing experience, we’ve seen it all. Asaclean® understands your priorities and has excellent cost savings solutions specific to your process and industry.

15. With your hand on the side or top edge of the mold, guide it into the machine and engage the locating ring into the alignment hole in the fixed platen.

Learn how processors at over 2,000 manufacturing locations in North and South America use Asaclean® to cut scrap rates, reduce downtime, and transform their process efficiency.

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.

ABOUT THE AUTHORS: 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; scientificmolding.com.

a. Check for obstructions above the machine, such as sprinkler heads, ceiling fans, etc. b. Check that the robot, picker, or other automation is safely out of the way.

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.

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.

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

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.

Currier Plastics had a major stake in small hotel amenity bottles until state legislators banned them. Here’s how Currier adapted to that challenge.

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.

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

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.

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.

Short shots or “shorts” are the incomplete filling of a mold cavity.  Some shorts can be easily seen as a large part of the cavity missing and some are very small and hard to see with a visual inspection.  Several factors can lead to short shots.

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.

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

Our Purging Experts answer frequently asked questions and address topics that benefit Process Technicians, Maintenance teams, Buyers, and even Plant Managers.

What started out as a routine request from one Plastics Technology columnist to another to review a draft for an upcoming article led to five highly experienced industry professionals collaborating to create this article about something virtually every molder does every day—sometimes many times a day—mounting a mold in a press.

The venting of the mold can also contribute to short shots.  If the mold is not vented properly it is possible for the gas to not be able to escape the cavity in time for the molding cycle to complete.  This can result in a short shot since the material can’t fill the void in the cavity because the gas hasn’t vented.  The vents on the mold should be checked for blockages and repaired if needed.

John Klees is a retired plastics specialist with more than 40 years of processing, part and mold design and construction expertise.

Plastics Technology Top Shops Benchmarking Survey provided both unanimous responses and divided results, but pervasive throughout is the sense of an industry still grappling with the aftermath of 2020’s global pandemic.

A well-trained and knowledgeable setup person understands the importance—and dangers—associated with the job. They have a heightened respect for their safety, as well as the safety of others, and for the molds, machines, and equipment they work with. They are an extremely valuable asset to every molding company.

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.

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

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

20. Use only hardened-steel washers designed to distribute the load on the clamp. Soft “hardware-store” washers will deform and come loose.

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.

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).

a. If the bolts are too short, with insufficient engagement, or too long and “bottom out,” you can strip the threads in the platen.

This 1-day technical conference and exhibition showcases innovative developments in materials, processing and equipment for the additive manufacturing industry. This conference is specifically designed to inform, update and educate plastic processors about implementing new additive manufacturing technologies. Hear technical presentations on the newest advances in additive manufacturing related to: design, materials development, processing equipment and enabling technologies, new applications and more. See exhibits from engineering plastic suppliers, compounders, molders, design and engineering firms and machinery suppliers. Experts will show you how to apply the latest technologies to your next project or program. The conference includes a full day of technical presentations, plenary and keynote presentations on business trends; breakfast, lunch and breaks; exhibits of advanced technologies and an evening networking reception.   Note: Additive Manufacturing Media executive editor Stephanie Hendrixson will moderate the Supporting AM Adoption in Northeast Ohio panel at 11:20 a.m.

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

The above procedure ensures that the mold is securely fastened to the platens and will not shift or loosen during production. But there is one final step to consider, which will help prevent premature tool wear and rejected parts.

Use our Grade Selection Guide to receive personalized Asaclean® product recommendations based on your goals & processing information.

a. Keep your fingers away from the chain links. b. Make sure no one is in the immediate area during this process. Use safety cones, barrier tape, or other preventive measures.

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

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.

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.

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

No more guessing about whether mold-mounting bolts are tightened properly, with an alternative to unreliable torque measurements.

What are the basic building blocks of plastics and how do they affect the processing of that material and its potential applications in the real world? Meet the repeat unit.

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

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.

On occasion you might hear the leader pins hit the bushings when you slowly close the mold. This is not uncommon when hanging a mold that doesn’t have a lifting strap or interlocks that help vertically align the two mold halves. To correct the problem, the mold half attached to the moving platen should be “re-hung” with a slight amount of lift or pre-load from the hoist. This usually helps, but does not solve the root cause, which is platen tilt. Platen tilt will be the subject of a future article.

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.

a. If the bolts are not lubricated, 85% of the torque is used to overcome friction and only 15% is available to produce bolt load. If the bolts are lubricated (with cadmium plate, molybdenum disulfide, anti-seize compounds, etc.), the friction is reduced and greater preload is produced with the same torque.

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

a. Make sure ejector bars are the correct length, the same length, that they are straight, and the threads are in good condition. b. If the mold is equipped with knockout extensions, the ejector bars should be flush or slightly recessed from the face of the moving platen when the machine ejector (aka butterfly) plate is fully retracted.

19. Attach the clamps on the fixed-platen side to prevent the mold from rotating or the locating ring from disengaging from the alignment hole, but do not yet fully tighten the bolts to the specified torque value.

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

Many times shorts are related to a faulty process.  Inadequate injection pressure or injection speeds can cause shorts.  If the screw is bottoming out at the end of the cycle resulting in a zero cushion then the process can’t be relied upon as repeatable and many times this can generate shorts.  If shorts are present in the production run the process should be checked as well as the resin being processed as a change in viscosity can throw off the process and cause defects in the production run.

35. Stroke the ejectors forward and backward a few times to make sure they function properly and nothing is binding or squealing.

These humble but essential fasteners used in injection molds are known by various names and used for a number of purposes.

There are five specific areas that designers and manufacturers need to consider to realize the potential of these unique materials.

a. If the clamp pressure has not been established yet, use a high pressure value for large molds or large parts, and a medium pressure value for small molds or small parts.

Jim Fattori is a third-generation injection molder with more than 40 years of molding experience. He is the founder of Injection Mold Consulting LLC, and is also a project engineer for a large, multi-plant molder in New Jersey. Contact jim@injectionmoldconsulting.com; injectionmoldconsulting.com.

c. The clamp bolt should be as close to the mold as possible. You want the pressure of the bolt acting on the toe—not the heel (see Fig. 1).

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.

In many cases, decreasing the discharge temperature will improve product quality and perhaps even boost rate. Here are ways to do it.

Asaclean® helps injection molders, extruders, and blow molders dramatically reduce scrap and downtime. Whether you’re struggling with hot runner color changeovers, costly screw pulls, or holding a bubble in blown-film extrusion, we have the solution to your problems.

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

a. “Click-type” torque wrenches help ensure all of the clamps have the same amount of torque. If all the clamps are not torqued evenly, the one(s) with the lower torque value may come lose.

a. This is a good rule of thumb. Most machine manuals will specify the minimum mold size for a given machine. Some machines even have placards mounted on the frame. b. The smaller the mold, the more the platens will “wrap around” or bow when clamped under high pressure. This can cause flash in the center of the mold. c. If the mold is excessively small, catastrophic damage to the platen can occur.

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.

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

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

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.

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

a. Check for “dings” or raised areas on the mold and platen—especially the locating-ring alignment hole. Stone flush if necessary.

Purging Compounds are an easy-to-use and affordable way to dramatically reduce scrap & downtime in plastics manufacturing. But how do you know if purging compounds are right for you?

a. Only use shouldered eyebolts, or preferably, swivel-type hoist rings. b. Eyebolts must be threaded all the way in and tightened. c. Two eyebolts are safer than one and can help prevent the mold from tilting. d. Ideally, the location of the eyebolt is at the mold’s center of gravity, so it does not tilt.

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.

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.