Wunder-Mold’s quality and attention to detail are at the heart of our mission. As a custom plastic injection molding company that has been in the business for over 24 years, we constantly seek ways to further advance the scope, quality, and cost-efficiency of our injection mold manufacturing.

Our customers in California and worldwide benefit from our quality of material and workmanship, as well as excellent technical and production assistance. Using state-of-the-art technology and our experience and expertise, we provide comprehensive injection molding services ranging from assistance in design, development, prototyping, and manufacturing to match your specifications. Have the leader among injection mold manufacturing companies on your side.

A team that delivers timely service & consistent quality



Capable project management from design to final part. One-stop service for all of our clients’ plastic injection molding.


Injection molding
industry experience

Decades of custom plastic injection molding engineering and processing experience ensure predictable outcomes.


Premium quality products
& workmanship

Durable, high-quality components you expect from an ISO 9001 facility, including maximum yield and minimum waste.


Variety of design
and material options

Customized design and a full range of plastic material material offerings including a wide variety of colorant and over-molding options.

Excellence-driven & expertise-based injection molding near you in California

Advanced precision ceramic & plastic molding enable us to deliver high quality, cost-effective parts every single time and for a wide range of clients operating in specialized industries.

Call us: (707) 448-2349

Competitive prices, minimum waste

As a leader among plastic injection molding manufacturers, we employ state-of-the-art production technology and a wide range of effective techniques for precise custom plastic injection molding. This allows us to maximize yield and reduce waste, while maintaining consistent quality and on-time delivery at a competitive price.

Characteristics of plastic materials we implement

We use high-quality resins in the manufacturing process of custom plastic injection molds in order to ensure durability and dependability of the final product. We also offer in-depth materials expertise and experience, enabling you to optimize quality and price.

Production capabilities:

  • Parts weighing from 0.1 g to 500 g
  • Mold cavitation up to 44 parts at a time
  • Part tolerances 1% of dimension or 0.001″
  • Wall thickness from 0.040″ to 0.250″
  • Insert molding capability
  • Plastic part assembly capabilities

For questions or a quote please contact us at Wunder-Mold or at 707-448-2349.

Benefits our injection mold manufacturing offers

As custom plastic injection molders with years of experience in the field, we strive to provide the optimal solution for each client based on individual requirements. We can help with the design and development of new components or help reduce the cost of manufacturing parts based on an existing part design. We offer:

  • Custom-molding complex parts to specification
  • Prompt response times
  • Stringent quality control process
  • Service & on-time delivery
  • Flexible working relationship
  • Competitive pricing

Frequently asked questions

What is the injection molding process?

During the process of plastic molding manufacturing, a molten plastic mixture is forced under high pressure into a custom-made mold so that the material takes the shape of the mold cavity. Once the part has been removed from the mold it is typically finished, but may require secondary operations.

What are the benefits of injection molding?

Injection molding has been around for nearly 150 years. This manufacturing process is ideal for production of large quantities of identical objects due to the following key advantages:

  • High precision and accuracy
  • High efficiency
  • High flexibility
  • Consistency
  • Lower labor costs and minimal post-production work
  • Affordability
  • Sustainability

What is plastic injection molding used for?

Plastic injection molding is used for the production of plastic parts in medium to high volume production levels. These parts come in an array of different colors, shapes, and sizes.

What products are injection molded?

Since injection molding represents the most common method of plastic parts manufacturing, the list of products can range from bottle caps to car parts. More complex parts are made out of a combination of two or more materials through a special process called overmolding.

What material is used in injection molding?

Special varieties of plastic are typically used in the injection mold manufacture, including: polycarbonate, acrylonitrile butadiene styrene (ABS), nylon, etc.

As a reputable plastic injection molding company, we offer an array of materials that can be used in the production process. Learn more about various materials that we use at our materials page.

How are injection molds made?

Custom plastic injection molders employ computer-aided design (CAD) software or similar to produce custom molds machined with different disciplines out of solid metal and generally have two halves that will come together during the mold assembly process.

A mold is essentially a hollow metal block. Cavities within it are filled through gates and runners, and once filled with plastic, will produce the desired part. To learn more about our process and what it entails, feel free to contact us at your convenience.

How long do injection molds last?

The life of an injection mold is directly related to the type of mold, the type of material injected into it, and the number of parts produced.

A mold life expectancy can last between hundreds and millions of parts if properly constructed and maintained. The application (i.e. prototyping, production) usually dictates the mold’s endurance.

What is custom injection molding?

Custom injection molders design and manufacture custom molds and/or custom parts from a mold for the customer at small, medium, and large volumes. As the leading industry’s company, Wunder-Mold specializes in this process and is able to deliver a product design to your exact specifications and industry requirements.

Who invented injection molding?

American inventors and the first plastic injection molding manufacturers, brothers Isaiah and John Wesley Hyatt patented the very first injection molding machine in 1872. Despite its seemingly simple original design, this machine made the manufacturing process infinitely easier. It also served as the prototype for the sophisticated machines that we use nowadays, since the principle is much the same to this day.