Injection Molding

Whether you are looking for a one-time sample, a one year production run or a series of short term bridge runs to get you from mold build to your production run, Sun Pattern Plastics Inc. has the experience and equipment to service you.

We also offer full production molding for short or long term requirements with full process monitoring capabilities. With the ability to process commodity or engineered materials along with our wide range of press sizes, we are flexible and agile while holding the highest level of customer service, performance, quality, and safety. Insert molding, thermoset injection molding, and small lot processing are where we excel. Along with molding; secondary operations, assembly, and order fulfillment services are also available.

We pride ourselves on being independent throughout the manufacturing process which includes being able to sample the tools we build. Our line of thermoplastic injection molding presses ranging from 28 to 500 ton sets us apart from the rest. Sample services are available for fellow mold builders and repair shops as well.


Sun Pattern Plastics offers all of our capabilities as service work. Whether it be one or a combination of a few of these services, Sun Pattern Plastics Inc. has the solution for you.

Plastic Screw Machining

Keeping in mind the increasing value and demand for plastic fasteners and screws, manufacturers are focusing on designing the same. Plastic fasteners are used for applications where thermal, weight, environmental, optical, chemical and electrical properties are of significant consideration for end use.

CNC Milling

Sun Pattern Plastics Inc. milling techniques include cutters that move along with multiple axis and are capable of making various shapes, holes, and slots. These techniques ensure timely machining services for even a large bulk of production runs.

Acrylic Fabrication

We at Sun Pattern Plastics Inc. have employed varied facilities to give wonderful shapes and designs to acrylic and hence our professionals are capable of taking up exciting custom projects dealing with acrylic fabrication

Our acrylic division provides custom acrylic fabrication solutions. These include acrylic displays designing, acrylic lighting solutions, and custom acrylic fixtures.

Special Services

Sun Pattern Plastics Inc. offers all of our capabilities as service work.  Whether it be one or a combination of a few of these services, Seguin Plastics & Mold has the solution for you.

Assembly & Packaging

Sun Pattern Plastics Inc. offers cost effective assembly and packaging services for your products.

We offer full assembly and sub assembly. We can also assist you with part procurement for completing assemblies.

We have the facilities to package your parts to your needs. We are able to provide customized packaging with your logo. We can bag, box, or specialty pack your parts in any quantities that you need.


We kit parts together according to your direction. We can help with procurement of parts, so all you have to do is order the kit.


Whether you ship to one customer or hundreds of them, we can direct ship your parts straight to your customers for you. Why pay for shipping to your facility, when you can have the product sent directly to your customer?

JIT Delivery

Sun Pattern Plastics Inc. is unique in its offering of JIT delivery. We allow our customers to purchase larger quantities for a discounted price, but with the option of taking the order in increments. Large or small orders can be delivered when you want them, so you are in charge of your inventory.

We pride ourselves in providing on-time delivery. We try to be as up front regarding delivery times to ensure you get an honest estimation as to when your components will be delivered. Our standard lead times vary depending on production schedules

Other Special Services

- Engraving

- Silk Screening

- Pad Printing

- Hot Stamping

- In-Mold Decorating

- Painting

- Metallizing

Contact Us

Email Us with Questions or Inquiries!

Sun Pattern Plastic Inc.

505 wegner drive, west chicago, IL 60185, us

(630) 293-3366


Monday - Friday: 7:30am - 4:00pm

Saturday: By appointment

Sunday: Closed