Injection Molding Hot Stamping Process

Hot Stamping Injection Molded Parts the Right Way

Hot stamping as an injection molding secondary process can be an excellent choice for plastic parts when the desired appearance of the end-product requires color, texture, or a metallic look.

Hot stamping can be used to add logos, color accents, even ingredients and instructional information to plastic parts. In this injection molding secondary process, ink is transferred to the parts at a high temperature, so it can be cured at room temperature, resulting in a strong bond and a durable finish.

When a metallic looking finish is desired, foils and specialty films can be used. Sheen and layers of protection can also be added by selecting the correct film. Of course, compatibility and good adhesion must be taken into consideration, right along with desired appearance.

To create a custom hot stamp design, a die is machined from copper, brass, magnesium, steel, or silicone. Material choice is determined by the detail of the artwork and the expected part production volume. Hot stamping offers plastic part decoration that achieves high-end results. As with other methods of painting and finishing plastic parts, planning to incorporate important graphics or product information during the design phase makes for quicker production and lower production costs.

Hot stamping is used to decorate raised areas, where a heated die applies pressure to a hot stamping foil that is then pressed against the plastic part. This process is also known as tipping.

Hot stamping foils are available in a wide array of colors and finishes, from matte to high gloss, from specialty foils to holographic and metallic. The heat combined with pressure from the die transfers the pigment from the hot stamping foil onto the plastic part. Hot stamping can be used on flat and rounded surfaces and can cover an entire perimeter or the front and back of a specified surface, all in one operation.

The Benefits of Hot Stamping

Because the ink used in the hot stamping process is dry, there are no unpredictable chemicals for employees to contend with. This means that there is no need for specialized venting equipment and no drying time to slow down production. This dry hot stamping process tends to decrease packaging and handling costs because the decorated parts can be volume packed on-line without damage to the decorated part surfaces.

Because of these factors, for the right plastic parts, the hot stamping process can be a very cost-effective option. As industry trends and the needs of our customers change, so do our processes and secondary services. We never stop developing better, more efficient injection molding processes and finishing options. It’s how we stay ahead of the curve. It’s how we help our customers succeed.

Color matching, patterns, logos and other specifics, and other injection molding secondary process may be needed.

Hot Stamping ProcessSpecialist In Hot Stamping Injection Molding of plastic parts

For injection molded plastic parts that require more than a blank surface, there are many options for adding color, texture, logos, gloss, and even protection.

Some more commonly used plastics for injection molding processes include ABS, acetal, nylon, PVC, polycarbonate, and polypropylene. An extensive knowledge is required to apply paints, labels and foils to plastic parts and we have that kind of knowledge at ICOMold. We know plastics. We understand the intricate chemistry involved in molding plastics. For over a decade, we’ve developed injection molding processes that produce the parts our customers need while controlling costs and turning out consistent quality parts.

When it comes to finishing choices, there are many. Our experienced design and engineering team can help you determine the best injection molding secondary processes to achieve your desired result. The hot stamping process is just one of the many we can use.

The Hot Stamping Process is Just One Injection Molding Secondary Process We Offer

Following the molding process, we can offer many different effective paint and finish options for many kinds of plastic parts. Films, paint, powdered plastics, even metallic vapors can be used. In some cases, hot stamping injection molding can bring the most desirable appearance within budget, while providing a durable finish.

For more details and painting process options for your injection molding parts, see our list of other Injection molding painting processes.

Our design experts are available to help you and your team evaluate all the options and make the best choice for achieving the results you need with a quality bond you can be proud of.

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Preparing Injection Molded Parts For Hot Stamping

Proper surface preparation is crucial for a successful adhesion to occur with any plastic part finishing and painting process. As with other methods, surface preparation is vital to the hot stamping process.

A good bond can be achieved by understanding the many chemical and molding process factors involved in each part design. Having a firm understanding of these can go a long way toward the proper preparation of the part surface.

The potential for mold and part contamination is present in any injection molding process. That’s why we’ve developed methods for avoiding contamination that can come with deburring and overspray, as well as other steps in the molding process.

Another consideration is the fact that many plastics used in injection molding generate electrostatic surface charges. The electrostatic charges tend to attract contamination, as if magnetic. We avoid painting defects and maximize hot stamp foil and film bonding by knowing plastics so comprehensively. We continually analyzing entire processes, from mold design, to material options, to mold prep and part surface preparation.

  • We strive to develop tooling designs modified to downstream painting requirements in the plastic parts that will be molded
  • Designing for as few cutouts as possible helps provide a better painting process
  • Rounded part edges can be more easily covered with paint than sharp ones
  • Because residual burrs can lead to contamination all the way into the painting booth, we keep deburring to a minimum
  • We also have developed systems for keeping tools extremely clean, to avoid excessive buildup of the materials used in the injection molding process

Other Ways We Optimize Part Surfaces For Hot Stamping Injection Molding

Through the use of release agents, additives, filler materials and fibers we can improve the characteristics of plastic injection molded parts and the bond we can create with various paints, foils and films.

We’ve developed exacting processes and procedures for keeping these agents off the plastic part surfaces and to protect from transfer to the plastic parts we mold.

Hot Stamping On Plastic Requires Surface Energy

The types of plastics used in injection molding processes don’t tend to carry much surface energy. This can make adhesion of paints, inks, foils and films difficult to ensure. Cleaning and some pretreatments can go a long way toward creating a good surface for secondary processes. We often pretreat plastics that are going to be painted or stamped. This allows us to increase the surface energy of the part surface and improve the quality of finish adhesion.

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Color Matching Methods For Hot Stamping Processes

We can custom-adjust color, gloss or add multiple colors for your design. To do so, we utilize:

  • Pantone color matching
  • Physical sample color matching
  • RAL color matching

Surface Etching For a Better Hot Stamping Process

Most plastic parts are smooth when fresh from the molds. Sometimes, to further improve adhesion, the surface of the part can be etched to prepare for painting, foil or film stamping. To do this, we use a chemical agent to create some mild surface roughness and gripping areas that will provide a better bond for the paint, foil or film. Etching must be done carefully and correctly, to avoid parts damage.

A Simple Process For Creating Appealing End-products

Injection molded plastic part surface preparation is vital to any successful finish process. If the bond isn’t durable, the design won’t matter. Good adhesion is the key to long lasting finishes. At ICOMold, we offer options that will bring you the best possible end-result for products you can offer with confidence.

Injection Molding Production Highlights

>  Instant mold and part quote
>  Low cost, quick build and quality production
>  ICOMold's Lifetime Warranty on Production Molds
>  Online project management
>  Trouble-free part modifications

>  No size limitations
>  Any commercially available material and surface finish

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What is the process for injection molding production?

ICOMold’s instant online plastic injection molding quote and mold frame sharing technology enables us to simplify and shorten both the quoting and tooling manufacturing process for custom plastic injection molding.

  1. Load your 3D CAD file to get an instant mold and part quote
  2. Upon order confirmation, ICOMold starts the mold and part order process
  3. Tooling design review by ICOMold engineers
  4. Upon design approval, ICOMold begins building your injection mold
  5. Customer examines samples for approval
  6. Part production begins

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Go to our plastic injection molding and CNC machining case studies page to see how we helped customers on their projects.