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Injection Molding
In injection molding, material is fed through a hopper into a barrel where a reciprocating screw mixes and melts the material then injects it into a mold.
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AIM Institute Continues to Grow Plastics Education and Training on 10th Anniversary
The AIM institute was created in response to the rising need for skilled injection molding professionals, providing individuals with a fundamental understanding of plastic rheology and plastic flow through a mold.
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Bulk, Solid and Melt Density: How to Calculate These Values and Why They Matter — Part 2 of 2
Understanding and calculating solid density and melt density will help molders with everything from material and machine selection to determining piece part costs.
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Process Monitoring or Production Monitoring — Why Not Both?
Molders looking to both monitor an injection molding process effectively and manage production can definitely do both with tools available today, but the question is how best to tackle these twin challenges.
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Optimizing Pack & Hold Times for Hot-Runner & Valve-Gated Molds
Using scientific procedures will help you put an end to all that time-consuming trial and error. Part 1 of 2.
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A Systematic Approach to Process Development
The path to a no-baby-sitting injection molding process is paved with data and can be found by following certain steps.
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Three Key Decisions for an Optimal Ejection System
When determining the best ejection option for a tool, molders must consider the ejector’s surface area, location and style.
Read MoreLatest Injection Molding News And Updates
Portable, Handheld CMM Enables Simplified Dimensional Measurement, 3D Scanning of Large Parts
Eastec 2025: Keyence’s WM-6000 provides full CMM and CAD capabilities, enabling 3D/GD&T measurements, contour profile checks, CAD comparison and reverse-engineering.
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Alarm System Monitors Moldmaking Equipment for Leaking Molten Plastic
Plastixs’ Airtect LA502 Dual Plastic Leak Alarm System monitors moldmaking equipment for plastic leaks to help prevent significant damage caused by leaks in either molding machines and hot runner molds.
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Husky Expands Facilities and Services in India
The company says its expanded presence in India helps clients meet the country’s sustainability mandates — which require 30% recycled plastic content in packaging by 2026 and 60% by 2029.
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Engel Opens Injection Molding Machine Manufacturing Plant in Mexico
With a capacity to produce between 180 and 200 injection molding machines per year, Engel has inaugurated its first production plant on the North American continent. This long-term project will expand in phases to offer vertical integration in manufacturing, automation and a solutions center.
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Sumitomo (SHI) Demag North America Names New Executive Leadership
The company has appointed Liam Burns to serve as president and John F. Martich III to serve in the expanded role of chief operating officer.
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AIM Institute Continues to Grow Plastics Education and Training on 10th Anniversary
The AIM institute was created in response to the rising need for skilled injection molding professionals, providing individuals with a fundamental understanding of plastic rheology and plastic flow through a mold.
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Featured Posts
Injection Molding Stock-Shape Parts in High-Temperature Materials
Patented technology is described as a hybrid that uses a specialized tool, a standard injection molding machine and off-the-shelf components to replace compression molding and extrusion for large stock shapes.
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Metal and Polymer Molding, Additive Manufacturing and MoldMaking All Under One Roof
From metal molding to polymer molding, additive manufacturing to moldmaking, material selection to formulation, prototyping to production, PTI Tech has emerged as a one-stop molding shop.
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Screw Bounce — What Causes It and Why You Should Care
There are a lot of theories about screw bounce in injection molding it, but what’s the actual cause? Through a series of experiments, and some good old-fashioned math, the author found out.
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5 Trends in 3D Printed Injection Mold Tooling
3D printing has moved beyond conformal cooling, and is now being applied to injection molds more broadly. Observations on additively manufactured mold tooling from the Plastics Technology Expo — PTXPO 2025.
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PTXPO Recap: Lightweighting with Foaming Technologies
Check out what you missed on the PTXPO show floor. Foaming technologies have long offered molders a way to reduce part weight, but a new approach demonstrated by Engel and Moxietec takes it further.
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Moving Beyond the Relative Viscosity Curve — Determining Optimum Plastic Flow Rates: Part 1
Should injection molders consider using a range of plastic flow rates, versus the selection of one plastic flow rate from the relative viscosity curve?
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FAQ: Injection Molding
Plastic injection molding is a cyclical manufacturing process that allows for cost-efficient production of a mass number of identical parts made from either thermoplastic or thermoset materials.
Cushion values in injection molding ultimately are an indication of a part’s quality, especially its dimensions. A consistent cushion will create consistent part dimensions.
It is important to determine which type of bubble your part has, and what the root cause might be. Determining bubble type will allow you to pinpoint the source and determine your next course of action to eliminate the problem.
Most molders are still relying on “general-purpose” screw designs that go back 30 years. With all of the technical improvements that have been made on machines over that time, nothing has been done to improve melt uniformity. We still use “general-purpose” (GP) screws, which well-known screw designer Bob Dray wisely has called “no-purpose” screws. That is they do not melt plastic uniformly. Processing with a uniformly melted plastic would seem like a high priority, but it has seen little if any attention.
Injection Molding Supplier Categories
- Thermoformers
- Platens
- Extrusion Blow Molding Machines
- Pre-expanders, Polystyrene Bead
- Mold-Cleaning Equipment & Chemicals
- Mold-Cleaning Equipment & Chemicals
- Trimmers, Deflashers for Blow Molding
- Stretch-Blow Molding Machines
- Injection Blow Molding Machines
- Dip-Blow or Compression-blow Molding Machines
- Injection Molding Nozzles
- Parison Programmers
- Presses, Polystyrene Bead
- Spray Coating Systems (for Bottles)
- Inserts
- Accumulators (Melt)
- Structural Foam Machines (for Thermoplastics)
- Injection Molding Non-return Valves