About Insert Molding
Insert molding is the process of injection molding molten plastic around any substrate or insert.
Many substrates are used in insert molding, but brass threaded inserts and bushing are the most popular. In addition, many companies make custom inserts that can be insert molded.
Did you know you can insert mold plastic parts? This process is called over-molding, and it lends itself when you need two or more different materials in the same part.It is left up to the imagination when deciding what type of inserts can be over-molded.
Furthermore, Chenvix is one of the few injection molding companies that offer over-molding and insert molding services.
Speak
Explore conversation courses.
Read
Explore reading courses.
Write
Explore writing courses.
Insert Molding from Prototyping to Production
Rapid Tooling
Production Tooling
Get easy design feedback and validation through superior quality prototype tooling. Create small batches of plastic molded parts with excellent injection molding prototypes. We excel at manufacturing prototype molds within days to ensure you perform functional tests and validate market interest.
We create high-quality production molds for high-volume plastic parts production. With high-strength, durable tool steel material, our production tooling is suitable for producing hundreds of thousands of parts. We can vary materials and construction methods according to your unique requirements.
Insert Molding Services From Chenvix
Insert molding combines plastics and metals into a single assembly. The process of insert molding reduces assembly and labor costs while increasing design flexibility and part performance.
Our vertical injection machines with rotary tables allow us to over mold and encapsulate inserts for electrical circuitry, fastening, and connecting. Common insert molded products include sensors, switches, connectors, and actuators.
RJCmold’ insert molding capabilities include manual and fully automated operations, with additional secondary forming, blanking, and 100% hipot and continuity testing.
Injection molding process parameters
We offer flexible injection molding solutions, capable of handling everything from rapid prototyping to large-scale production. With a focus on precision and fast lead times, we ensure plastic parts that meet your custom requirements.
Insert Molding Advantages
Durability: Metal inserts will guarantee thread function and mitigate wear and tear over the part’s life.
Strength: Because it’s a “one-shot” process, insert molding can produce more vital parts than overmolding and other processes.
Creating Production Parts: Insert molding is great for creating prototypes and production parts.
The benefit to insert molding is that parts can be mass-produced faster than whole machining parts out of metal.
Even though insert molding adds to the cycle time (typically 15 seconds per insert), it is still much faster than CNC machining a part from a solid block.
Furthermore, by insert molding metals where necessary and replacing the rest of the part with plastic will, in turn, reduce the overall weight of the part.
Materials for Insert Molding
We provide a wide range of materials for thermoplastic and inserts that can help you make insert molded parts of different industrial applications. Below are the materials used in custom plastic insert molding and common examples.
Before the insert molding process starts low or high-volume production, a high-tolerance CNC machined tooling is needed. Most commonly used materials include:
Tool Steel: P20, H13, S7, NAK80, S136, S136H, 718, 718H, 738
Stainless Steel:
420, NAK80, S136, 316L, 316, 301, 303, 304
Aluminum: 6061, 5052, 7075
Tooling Materials
Plastic injection molding service comes with a wide range of materials with different properties, including impact strength, rigidity, thermal resistance, chemical resistance, etc.
ABS Nylon (PA) PC PVC
PU PMMA PP PEEK
PE HDPE PS POM
Plastic Materials
Standard plastic materials may not meet custom injection molding parts requirement. In this case, additives and fibers can be added to improve aesthetic and functional properties, providing additional features for your injection molded parts.
UV absorbers Colorants
Flame retardants Glass fibers
Plasticizers
Additives and Fibers
The introduction of inserts onto mold cores cast using the manual or automated process leads to the plasticization of plastic pellets after closing the mold halves. Ejection of the pieces from the mold takes place after the plastic’s hardening, followed by the encapsulation of the inserts in the parts.
Brass
Stainless Steel
Aluminum
Inserts
Finishing
We offer multiple finishing options to complete the products made with the insert molding process. You can choose from any of the following depending upon your application’s requirements:
Interior, non-cosmetic finish according to the geometry of the mold.
Standard Finish
Creating textures on the molds so that it shows on the final product. This finishing option includes matte, swirls, patterns, and lines.
Mold Texturing
Range of SPI finishes from Grade 3 diamond / high polish to 320 stone low polish. These Finishing options include SPI A-1, SPI A-2, SPI A-3, SPI B-1, SPI B-2, SPI B-3, SPI C-1, SPI C-2, SPI C-3, SPI D-1, SPI D-2, and SPI D-3.
SPI Finishes
Engrave part numbers, designs, logos, or any other specified printing onto your parts.
Laser Engraving
We can install the most commonly used and popular standard inserts in UNF and metric sizes.
Threaded Inserts
Application of an ink-based design to the surface.
Pad Printing
As the name suggests, the mold will remain ‘as it is’ – without any secondary texturing or polishing.
As Molded
Painting the surface with standard colors or Pantone matching, including Primer and topcoat. Masking available; EMI (copper) paint.
Painting
Insert Molding Applications
Plastic insert molding is applicable in making prototypes and full products in several industries. Key industrial applications of insert molding include:
