From Rapid Prototyping to Injection Molding Manufacturing
Plastic Injection Overmolding Services
Reliable OEM Customized precision injection molding services for on-demand parts, professional DFM feedback with Mold Flow Analysis technical support.
The most cost-effective manufacturer's quote your project will benefit from.
- No MOQ limit.
- Optimize product design solutions.
- Quick molds are completed in 2 weeks.
- ISO 9001-2015 & TS 16949.
- Quality standards in the automotive industry.
- Free DFM Feedback & Mold Flow Analysis Support.
On-demand manufacturing
Mold Tools Design Services
Rapid Prototype Services
ISO 9001 & TS 16949
Custom Plastic Overmolding Services
supro molding provides professional over molding services, including: product design, material selection advice, mold design and manufacturing, and large-scale mass production services.
As part of our custom injection molded parts manufacturing capabilities, cost-effective overmolding services allow us to fit the needs of more industries and provide customers with a wide range of custom injection molding solutions.

- A combination of aesthetic decoration and ergonomics.
- High efficiency, low cost manufacturing.
- Maintain consistency, repeatability.
- Improve structural strength, durability.
- More flexible design solutions.
injection molding machine
20-1200Tons
tolerance
±0.01mm
surface treatment
15 types
Expert Team
62
Our Overmolding Parts
Plastic over molding is available in a wide range of material and form combinations to create excellent strength properties, flexibility, anti-slip, fire retardant, thermal insulation, protection, aesthetic decoration and ergonomic advantages.

Micro Injection molding

2 Shot Injection Molding

Custom Mold Tools Making

Plastic Injection molding

Plastic OverMolding

insert Injection molding
Material Solution of over Molding Services
Supro Molding offers a robust list of material options to support a full range of material solutions for buyers in a variety of industries.
Mold Tools Material Options
P20
718
718H
H13
S7
738
S136
S136H
420
NAK80
6061
7075
304
316/316L
List of Injection Molding Materials
ABS
PMMA (Acrylic)
Delrin (POM)
Garolite G-10
HDPE
LDPE
PEEK
Polycarbonate (PC)
PPS
Torlon
UHMW
Ultem (PEI)
TPU
PET
Nylon (PA66 & PA6)
TPE
PVC
Polypropylene (PP)
Rubber
Silicone
Special additives and fibers
UV absorbers
flame retardant
glass fiber
plasticizers
colorants
- Authoritative material report
- Globally recognized material brands
- Support for third-party testing
- Commitment to use 100% new materials

what is plastic overmolding?
Overmolding is a widely used injection molding process that adds more versatile thermoplastics or thermosets to the structure of an injection molded part to create multi-functional structural parts with a variety of material compositions, improved durability, enhanced aesthetic finishes, and ergonomic features, all at a high level of efficiency and low cost.
Injection Overmolding parts are commonly used in a variety of applications including automotive, electronics, medical devices, and everyday consumer products.
Excellent overmolding Company capabilities
We provide our customers with strong injection overmolding capabilities and manufacturing resources for more flexible and faster delivery of high quality products.
Standard Information
Maximum molding size
Minimum molding size
Product Tolerance
Mold Tolerance
injection molding
Equipment type
Mold Manufacturing Equipment
Material Options
Mould Type
Color Match
surface treatment
Inspection Standards
Minimum order quantity
Technical Support
Lead time
Injection Molding Capability
1200*1000*500mm
1*1*1mm
±0.01mm
±0.005mm
20-1200 tons (42 sets),
single and two-color injection molding machines
5-axis cnc machine, EDM, wire-cutting
60 materials
Mould Steel Moulds, Aluminum Moulds, Silicone Moulds
Pantone Color & RAL
18 surface finishes
ISO 9001-2015 & TS 16949
No MOQ limit
DFM & Mode Flow Analysis (free)
within 15-20 days,
Artistic over molding surface finishes
Flexible surface texture decoration can give overmolded parts more ornamental and market value, from an artistic point of view, to shape a pleasing surface effect.

glossy
SPI-A2
SPI-A3

semi-glossy
SPI-B1
SPI-B2
SPI-B3

Matte
SPI-C1
SPI-C2
SPI-C3

textured
MT
VDI
YS
Secondary processing
Injection overmolding parts
Flexible secondary processing can make the product more competitive market value and more artistic.

Precision CNC Machining
Realization of more precise injection molded products

spray paint
Versatile paint coatings, primers and topcoats for better light avoidance.

screen printing
Suitable for complex logo printing, with multi-color logo design, efficient and low cost.

laser engraving
More textured laser laser labeling, including: parts number with origin description.

ultrasonic welding
Connecting or assembling injection-molded products, tank structures that can withstand pressure.

electroplated
Create metallic finishes with an unrivaled metallic luster.
Ready for a new injection overmolding project?
Tell us about your project needs and help you complete more competitive, high-quality injection overmolding products efficiently and more easily.
You'll benefit from cost-effective factory price quotes.
Rapid Prototyping and Tooling for Overmolding
Supro Molding provides quality rapid prototyping and prototyping tools to help customers easily get real design feedback and functional verification. Always proactively addressing the need for rapid delivery.

3D Printing Services
3D printing allows inspiration to be quickly created into reality to verify that the product functions and is designed effectively and to get feedback on the rationality of the design.

Plastic Vacuum Casting
low-volume manufacturing eliminates the need for large-scale investment in tooling and simulates the properties of the correct material to ensure that the product is suitable for the consumer.

Rapid Injection Molds Making
The use of high-strength mold steel material, suitable for orders up to 100,000 pieces of demand, to ensure the precision and durability of the rapid mold.
Why choose Supro Molding for overmolding?
Founded in 1999 and located in Shanghai, China, we have an unparalleled leadership position in the field of plastic molding and mold design and manufacturing technology. With quality certifications such as ISO9001-2015 and TS16949, we can provide your projects with more efficiency, ease and cost-effective plastic molding supply chain needs.
Our professional technical team, advanced manufacturing equipment, and scientific manufacturing process system make our manufacturing services recognized by very many buyers, including: precision injection molding, inlay injection molding, two-color injection molding, micro-injection molding, precision CNC Machining, mold design and manufacturing, Vacuum casting, 3D printing, precision stamping, and other one-stop manufacturing services.
- Respect for inspiration and innovation.
- Refuse to cut corners.
- Excellent quality manufacturing resources。
- 24 Hours * 7 online technical support.
- Truly economically viable ex-factory quote.
Molds & Parts Design Services
Engineer Technical Support
At Supro Molding, a team of professional plastic molding experts can submit solutions for product design and mold design based on product requirements and inspirations, helping you to turn your inspirations into reality.
If you already have a preliminary design, our team of experts will evaluate the product design and make cost-effective recommendations and optimizations based on the application of the product as well as the expected quality standards, maximizing product quality and ornamental artistry, and maintaining low-cost operations.
- Based on industry-leading manufacturing technology.
- Optimize product design solutions.
- Maximize functionality and ornamentation.
- Drawing of product design documents.
- Mold design and manufacturing solutions.
Model flow analysis support
DFM Mold Tools Review Services
We are proactive in providing healthy and sustainable plastic molding solutions to all our customers, evaluating all production processes from part design, material selection, mold design and manufacturing, high volume manufacturing, etc. Moldflow software makes it easy to review the feasibility of plastic molding mold design solutions from different perspectives, and to identify more design flaws, error details, etc. as early as possible, and to resolve them quickly.
Supro Molding’s goal is not only to provide high-quality molds, but also to give products with higher economic efficiency from the perspective of product functionality and artistry, so that your project can get the potential of sustainable development.
- Structural Design Review Of Parts.
- Material Performance Review.
- Mold Accuracy Review.
- Drawing Angle Review.
- Review Of Plastic Molding Times And Mold Runners.
Rapid Prototyping services
More efficient operation, so saves time.
We provide our customers with flexible product validation through rapid prototyping processes such as 3D printing & plastic Vacuum casting. Through prototyping, we can more intuitively confirm the flaws and functionality of a product’s design. Through prototyping, we can more intuitively identify the flaws and functionality of the product design. We can quickly turn inspiration into reality, present your design ideas to your users, and bring you more market potential advantages.
We utilize state-of-the-art prototyping technology to reproduce 100% of the details of your creative inspiration. And it’s a very efficient manufacturing process that can be completed as early as the same day.
The rapid prototyping is your best choice before investing on a large scale.
- Confirm Initial Plastic Part Design.
- Confirm The Initial Mold Molding Structure Design.
- Confirm The Function And Surface Effect Of The Custom Plastic Molded Part.
- Confirmation Of The Potential Market Value Of The Plastic Part.
Reliable Quality Control Assurance
We have an in-house quality control laboratory with CMM, Projector, Pressure Tester, Tensile Tester, Flame Retardant Tester, UV Tester, and many other equipments for in-house testing of our products from raw material, finished size, and surface finish.
Our professional QC team will monitor the quality of the products during the production process and implement ISO9001-2015 and TS 16949 when the goods are delivered with all the QC reports.
We ensure the manufacture of high quality injection molded parts that meet industrial strength, durability, aesthetics, functionality and demanding tolerances.
- ISO 9001-2015 & TS 16949.
- Own internal quality control laboratory.
- Raw material testing and reporting
- Molds are regularly serviced and maintained.
- PPAP & APQP & 8D Reports
Work with our highly effective teams.
Find out how we can run your project, work with an efficient technical team, and ensure that you receive your products and molds within the scheduled lead time.
- Real ex-factory quotation within 2 Hours.
- DFM Report Feedback
- Model flow analysis support
- Optimize product design solutions.
- Drawing of product design documents.
- Mold design and manufacturing solutions.
- Sample Testing Within 15 days
- Small batch manufacturing in 5 days.
- Complete all tests and submit reports within 3 days.
- Express shipping arrives in 5 days, ocean shipping arrives in 30 days.
Wide range of applications

Automotive

Medical

Industries

Electronics

consumer goods & toys

Robotics
F.A.Q
We are plastic molding manufacturer, now totally we have 87 workers.
Injection molding and overmolding are both plastic molding manufacturing processes. While both methods involve plastic molding, they have distinct differences. Supro Molding will explain the main differences.
Injection Molding
Injection molding is a plastic molding manufacturing process in which molten plastic pellets are injected into a mold cavity under high pressure. The plastic is then allowed to cool and release from the mold to form a solid plastic injection molded part. Supro molding uses injection molding as a precise and efficient process to produce large quantities of plastic parts.
Some of the key features of injection molding include:
Producing single material parts
Injecting material into the mold cavity in one step.
This process can be used to produce large quantities of parts using the consistency of injection molding.
As the production volume increases, the cost per part decreases.
overmolding Injection Molding
overmolding is a widely used plastic molding manufacturing process that involves molding one material and then adding another material to the mold cavity to enhance the functionality and durability of the product. Soft, rubber-like materials are often added to rigid plastic injection-molded parts to enhance their ergonomics, non-slip insulation, and aesthetics.
Some of the key features of overmolding include:
Producing two-material components
First, we mold the first material and then mold the second material over the first.
This process enhances the durability and aesthetics of the component.
The cost per part is higher than injection molding due to the additional technology of molding the second over the first.
Differences between injection molding and overmolding
The main differences between injection molding and overmolding are:
Quantity of material: Injection molding produces single material parts while overmolding produces dual material parts.
Process: Injection molding injects molten plastic into a mold cavity in a single shot, while overmolding involves molding the first material and then molding the second material over the first.
Purpose: We use injection molding to produce large quantities of plastic parts, while they use overmolding to enhance the durability and aesthetics of the plastic parts.
Cost: Injection molding typically has a lower cost per part than overmolding due to the additional process of molding the second material on top of the first.
Applications for Injection Molding and Overmolding
At super molding, injection molding is commonly used to produce consumer products, automotive parts, and medical devices. Overmolding is also commonly used to enhance the durability and aesthetics of electronic products such as cell phones and remote controls.
Hard overmolding adds a rigid plastic layer to an existing material, such as rubber or silicone, to create a more durable and protective surface. The result is a product that can withstand harsh environments, resist wear and tear, and withstand repeated use.
Here are some of the benefits of using hard overmolding in product design:
Increased Durability: Hard overmolding provides an additional layer of protection that can extend the life of a product. Protecting the underlying material from abrasion reduces the likelihood of damage or failure of the effect.
Improved Grip: By adding a tricky plastic layer to a soft material such as rubber or silicone, supro molding can create a better grip for the user. It is vital to consider this factor, especially for products used in wet or slippery environments.
Resistance to environmental factors: Hard overmolding protects products from sunlight, chemicals and other environmental factors that can cause damage over time. This enhancement improves the product’s ability to adapt and withstand a variety of environments.
Aesthetic appeal: Rigid overmolding can also improve the appearance of a product. By adding a clever layer of plastic, supro molding can create a smooth, polished appearance that would be impossible to achieve using a single material.
Customization: With hard overmolding, customers can customize their products by adding logos, colors and other design elements to the surface. This branding strategy helps increase market awareness.
supro molding uses hard overmolding in a variety of products, from industrial equipment to consumer electronics.
Here are some examples:
Handheld devices: Many handheld devices, such as cell phones and tablets, use hard overmolding to form a protective layer around the device. This feature helps protect the device from damage caused by drops and impacts.
Power Tools: Power tools are often exposed to harsh environments such as dust and debris. Hard overmolding protects these tools from damage and extends their life.
Medical equipment: Medical equipment requires high durability and resistance to environmental factors. Hard overmolding protects them and ensures that they function properly.
We expert moulds for 110 countries, our main markets are America,African , European and Middle East.
We have 18 CNC machine, the tolerance is ±0.02mm, and 7 high speed CNC machine, the tolerance is ±0.002mm.
Now we can make around 900 sets mould per year. In 2018 we make 659 set moulds, 303 sets bucket moulds and 356 set other moulds.
Yes, we have 20T, 60T, 80T ,90T,160T,250T,320T,390T,400T,450T,650T,800T injection machine for mould test and production.
If some spare part broken, we will send you new one. If the mould quality problem, we will repair and pay the ship cost. Or we make another new mould to you free.
We specialize in custom plastic molding products manufacturing for more than 20 years, we have rich manufacturing experience and technology, usually we can produce products of any structure and requirements. Suitable for all kinds of industries, please provide your design files, our expert team will analyze your products in detail.
We have our own in-house mold factory, we refuse any process of cutting corners, from design to manufacturing in our own factory, without any middleman, so our mold price is 20%-30% lower than many foreign trade type companies, submitting the real factory quotation to you.
(It is well known that many unscrupulous companies will use low quality materials for mold manufacturing, resulting in very low quotes, but the molds do not meet any industry standards and are very easy to damage. This is why choosing a mold maker is a very important part of the process)
Of course, this is one of our most important services and it is free of charge. We actively provide these technical supports, including: model flow analysis, DFM, etc. If you need our technical support, please contact us immediately. If you need our technical support, please contact us immediately and we will provide all technical resources without reservation.
Of course you can, although we will make a few adjustments to your molds to match our equipment, and once this is done we can produce the product you need. (We would appreciate it if you could provide us with the original mold design, it would be very helpful.)
Yes, we can do that, but we need you to provide us with a detailed drawing of the mold design and the design that needs to be changed, and we will analyze your mold to better meet your needs for new products. (Supro Molding is an experienced plastic molding mold maker, we know the latest technology in mold making, and we have a strong engineering team).
Of course, we don’t do any order limits. We understand that a lot of products are not responded to by the market, and a large investment will drag down your financial base and bring a huge financial risk.
At Supro Molding, we encourage all product development and design, and we can use the most cost-effective manufacturing solutions to help our customers reduce risk and save money, while not making any quantity limitations. Focus all skills and resources on the quality of the product. We prefer to be a technically oriented company that is helpful to our smaller customers.
Of course, our team of experts can give you the right material solution based on the functionality of the product and your requirements, and we are good at using characterizing materials (adding cost to make a material better).
Having trouble with your project? Talk to our team of experts and you will get free help at Supro-Molding.
Yes, we finish all the color matching through our professional engineers, if possible please provide the Pantone color number or RAL number you need. If not, please contact our team to give you the color card for your selection.
Of course we can, we have our own sheet metal bending, stamping and cnc machining factory and we can also buy the fasteners you need.
Usually we will finish the molds in 3 weeks – 4 weeks, and the production of different batches of plastic molded products in 1 week, but it is also subject to the complexity of the products.
We also accept rush orders, please discuss with us how soon it can be delivered.
Of course, the mold belongs to the customer. After the sample is confirmed and the quality of the mold is approved by the customer, we help the customer to store and regularly maintain the plastic molding mold, the ownership of the plastic molding mold belongs to the customer, and we will guarantee the safety of the mold and protect the copyright of the customer’s products.
T/T or L/C is workable to you, normal we accept T/T 50% with order, and the balance before the shippment.
You will benefit from our technical support.
Chat with our team of experts about your query.
Let us submit the most cost-effective factory quote.
One-stop on-demand plastic molding manufacturing.
Unrivaled on-time delivery of high quality products.