Wunder-Mold’s quality and attention to detail are at the heart of our mission. As a 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
Comprehensive
service
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 experience in custom plastic injection molding manufacturing & engineering 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.
Broad selection of high-quality materials for plastic injection molding
We leverage a range of top-of-the-line injection molded plastics to create parts with the exact properties you need.
| Polycarbonate (filled or plain) | Polycarbonates are thermoplastic polymers whose chemical structures contain carbonate groups. They are tough and strong materials that are easily thermoformed, worked, and molded. |
|---|---|
| Polyolefins | This type of polymer is formed from a simple olefin. For instance, to get polyethylene or polypropylene which are polyolefins, we need to polymerize olefin ethylene or olefin propylene. |
| ABS | Acrylonitrile butadiene styrene (ABS) is a thermoplastic polymer with the temperature for glass transition around 105°C. It’s an amorphous terpolymer produced by polymerizing acrylonitrile and styrene in the presence of polybutadiene. |
| Polyacetal | Also known as polyoxymethylene, polyformaldehyde, and acetal, it’s an engineering thermoplastic used by the best plastic injection molding companies to produce precision parts that require low friction, excellent dimensional stability, and high stiffness. |
| Rubber | Natural rubber, also known as latex, caoutchouc, caucho, Amazonian rubber, or India rubber contains isoprene polymers with slight impurities of other organic compounds and water. |
| Nylons | Nylon represents a group of synthetic polymers based on semi-aromatic and aliphatic polyamides. It’s a silky thermoplastic material and can undergo melting processes to form shapes, fibers, or films. It comprises repeating units connected by amide links which is similar to protein peptide bonds. |
| Acrylics | Acrylics, acrylic glass, or polymethyl methacrylate, also known under trade names of Acrylite, Crylux, Perspex, Plexiglas, Perclax, and Lucite is a transparent thermoplastic typically used in the form of a sheet as a shatter resistant and lightweight glass alternative. |
Competitive prices, minimum waste
As one of the top plastic injection molding companies in the industry, 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.
Unveiling our high-precision process of plastic molding manufacturing
Our team will adhere to your requirements and work closely with you to create the parts that meet your desired specifications. With years of expertise, we’ve created a streamlined process that guarantees optimal results, from mold building to shipment:
We’ll review your plans or create new ones, design plastic molds, and set the costs, budget, and schedule.
We have the capacity to provide low-volume, low-cost injection molds for prototypes that you can test and evaluate.
After creating an adequate mold approved by you, we move on to manufacture the parts.
Carefully selected resin pellets undergo the melting process, injecting them into the mold cavity, and left to cool and solidify.
When solidification is finished, plastic parts are ejected from the mold.
If necessary, the parts can undergo further finishing processes.
During and after the injection molding, and before shipping the components to the client, the parts go through a thorough quality inspection.
Characteristics of plastic materials we implement
We use high-quality resins in the process of manufacturing plastic injection molding, ensuring the 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 a plastic injection molding company 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 DOES A PLASTIC INJECTION COMPANY DO?
A plastic injection company is a business that handles plastic molding manufacturing. Typically, these companies operate on a medium to large scale, producing large quantities of plastic molds and related products for a diverse range of applications.If you’re looking for one of the best plastic injection molding companies, we’re here to help you with our expertise and precision.
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.
HOW ACCURATE IS INJECTION MOLDING?
In a word: extremely. This method is widely recognized as one of the most accurate and precise, up to a fraction of an inch. As an example, the best plastic injection molding companies can produce parts with very tight tolerances, ranging from ±0.005” all the way to ±0.001”.
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.
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.
WHAT ARE THE 4 STAGES OF INJECTION MOLDING?
To ensure high quality of fabricated parts, the best plastic injection molding companies employ a 4-stage process that consists of:
- Material preparation, which can take the form of high-speed or low-speed filing
- Melting & injecting the material into the prepared mold
- Pressure holding, to achieve the desired density and integrity of melted plastic
- Ejecting & cooling the finished product, until it is sufficiently solidified to avoid potential deformations caused by external forces
HOW LONG DOES IT TAKE TO MAKE A PLASTIC MOLD?
The time necessary for plastic molding manufacturing varies significantly depending on factors such as:
- Duration of the design process
- Complexity of the part
- Length of the tooling process
- Type of mold (e.g. single- or multi-cavity)
Based on the above, manufacturing of plastic injection molding can take anywhere from 2 weeks for simple parts to up to 18 weeks (or more) for intricate designs.
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.
WHAT IS THE HARDEST PLASTIC FOR INJECTION MOLDING?
Polycarbonate (PC) is generally considered to be the top plastic for injection molding when it comes to sheer durability. This material boasts excellent impact resistance and high tensile strength, making it suitable for a wide range of applications, such as car parts, medical devices, and even electronics.
WHAT ARE THE BENEFITS OF INJECTION MOLDING?
The process of manufacturing plastic injection molding is ideal for producing 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
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.
IS INJECTION MOLDING STRONGER THAN 3D PRINTING?
Yes, plastic injection molding typically produces parts that are much stronger than their 3D-printed counterparts. These are the reasons why:
- 3D printing works by stacking layers of material, which can compromise its strength and durability. Although there are some durable materials used in 3D printing (such as RG resin, for example), this method is severely limited in its choice of mediums and range of applications.
- Injection molding produces a single-piece, homogeneous part, which makes it highly durable. It also uses high-performance engineering plastic in its designs, achieving higher density and structural integrity.
WHAT IS THE FUTURE OF INJECTION MOLDING?
Top plastic injection molding companies work tirelessly to improve various facets of the process, including:
- Exploring sustainable alternatives to conventional materials used in manufacturing
- Implementing smart and interconnected technologies into processes and machinery
- Developing methods that allow for increased precision and miniaturization of fabricated components (“micro-injection plastic molding”), typically for applications in electronic devices
- Improving parts quality, along with process productivity and safety, through the implementation of advanced automation and robotics