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Injection Molding

Post-Processing for Plastic Injection Molding

After the precision of injection molding, our extra steps transform your components, enhancing and customizing them to perfection. Get ready to experience the ultimate upgrade in plastic part quality with Jaycon’s post-processing magic!


Principal image of What is Post Processing

Post-processing enhances the properties of plastic injection molded parts, preparing them for their intended end-use. This step involves corrective measures to eliminate surface defects and secondary processes for both decorative and functional purposes. In the context of Jaycon, post-processing includes actions like removing excess material (commonly referred to as flash) and applying part numbers.

True to its name, post-processing takes place after the completion of injection molding. While it incurs additional costs, these expenses may be more economical compared to opting for pricier tooling or materials. For instance, painting parts after molding could be a more cost-effective choice than using expensive colored plastics.

Within each post-processing method, there exist variations. For instance, there are multiple ways to paint injection molded parts. A comprehensive understanding of all available options empowers you to select the most suitable post-processing approach for your upcoming project.

Preparing for Post-Processing

Post-production in plastic injection molding marks the final phase of the manufacturing process. Contrary to the misconception that considerations like flash removal, painting, laser marking, pad printing, or handling threaded inserts with heat staking or ultrasonic welding should be deferred until the end of the design process, it is beneficial to incorporate these factors earlier in the planning stages.

By proactively addressing post-production requirements during the design phase, potential challenges can be identified and mitigated in advance. This forward-thinking approach not only enhances the overall efficiency of the manufacturing process but also holds the potential for cost savings and time benefits.
At Jaycon, we recognize the significance of a comprehensive approach to molding projects. Our experts are poised to assist you in navigating the intricacies of post-production, aiding you in making informed decisions about the most suitable techniques for your specific project requirements.

imagen Preparing for Post-Processing

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Imagen Painting

Painting stands as a pivotal post-processing technique for plastic injection molding, enhancing molded parts with vibrant colored coatings. While injection molders have the option to use colored plastic, the expense of pigmented polymers tends to be higher.

At Jaycon, we consider in-mold painting as an alternative, although it may not always be as cost-effective as painting after the molding process. Coatings that offer protection against electromagnetic interference (EMI) also fall under the category of post-process painting. Typically, plastic injection molded parts at Jaycon undergo painting for decorative purposes or to conceal any surface defects.

Before initiating the painting process, pre-treatment steps like cleaning or sanding may be necessary to ensure better paint adhesion. Plastics with low surface energy, including polyethylene and polypropylene, benefit from plasma treatment. This cost-efficient process significantly increases surface energy, creating a stronger molecular bond between the paint and the plastic substrate.

Post-Processing Services

The specific post-processing steps can vary based on the desired outcome and the characteristics of the molded parts. Common post-processing techniques include:

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Trimming and Deflashing

Removal of excess material, known as flashing, and trimming to achieve the desired final shape. This is often done through manual or automated methods.

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Surface Finishing

Polishing, sanding, or texturing the surface of the molded parts to achieve a specific texture, gloss, or smoothness. This can enhance the aesthetic appeal and feel of the final product.

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Painting and Coating

Application of paints, coatings, or finishes to add color, protect against UV radiation, or improve the part's resistance to environmental factors.

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If the final product consists of multiple components, post-processing may include assembly steps to combine individual parts into a finished product.

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Insert Molding

Integration of additional components or inserts during the molding process to enhance functionality or create multi-material parts.

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Heat Treatment

Some materials may undergo heat treatment post-molding to improve strength, durability, or other mechanical properties.

Need Other Services?

At Jaycon, we’re your all-in-one solution. From cutting-edge product design and rapid prototyping to precision injection molding and circuit board manufacturing, we’ve got you covered. Explore our comprehensive suite of services to turn your ideas into reality.

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Frequently Asked Questions

These frequently asked questions can help better understand Jaycon’s expertise, processes, and approach to confidentiality.

Post-processing in plastic injection molding refers to additional steps taken after the initial molding process to enhance the appearance, functionality, or performance of molded parts. This can include processes like trimming, surface finishing, painting, and assembly.

Post-processing is necessary to address aspects not fully achieved during the molding process, such as removing excess material, improving aesthetics through surface finishing, adding color or texture, and incorporating additional features like inserts or assembly.

Trimming and deflashing involve the removal of excess material, known as flashing, from molded parts. This process ensures that the final parts meet specified dimensions, improving the overall quality and appearance.

Yes, post-processing is highly customizable. Whether it's achieving a specific texture, color, or incorporating additional features, post-processing can be tailored to meet the unique design requirements of different applications.

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