Order your custom plastic parts.

Online Injection Molding service

Obtain custom plastic prototypes and high-quality production parts. Request free quotes for injection molding today!

TonZa Making | Injection Molding
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On Demand Injection Molding Service

We produce high-quality plastic molded parts of any size or complexity, using both thermoplastics and thermosets. Our manufacturing meets ISO 9001-C or tighter tolerances.

Plastic injection molding

Plastic injection molding is the most widely used method for mass-producing plastic products. The process involves melting plastic, injecting it into a mold, allowing it to solidify, ejecting the finished product, and repeating the cycle.

Fast delivery

Over molding

Overmolding is a manufacturing process where one material is molded over another to create a single, integrated component. It typically involves molding a soft material, over a rigid plastic or metal substrate to enhance grip, durability, or aesthetics.

high-quality

Insert molding

Insert molding is a manufacturing process where a preformed component, typically metal or another material, is placed into a mold before injecting plastic around it. This creates a single, integrated part with enhanced strength, durability, and functionality.

Custom Parts

Why Choose ours Injection Molding Service?

Capabilities of injection molding Services

We provide top-quality plastic injection molding services, delivering high-precision, finely finished parts at competitive prices.

Design Guidelines

Optimize your designs for manufacturability with our expert guidelines and feedback, ensuring the best results in injection molding service

Wall Thickness

1. Maintain uniform wall thickness to prevent warping, sink marks, and stress concentrations.

2. Recommended thickness: 0.8 mm – 4 mm, depending on material.

3. Gradual transitions between different thicknesses help avoid defects..

Draft Angles

1. Add draft angles (tapered walls) to facilitate easy part ejection from the mold.

2. Typical draft angle: 1°–3° per side, more for textured surfaces.

Ribs & Gussets

1. Use ribs to strengthen parts without excessive thickness.

2. Rib thickness: 40–60% of the main wall thickness.

3. Add gussets for additional reinforcement.

Fillets & Radii

1. Avoid sharp edges; use fillets to reduce stress concentrations.

2. Recommended inside radius: at least 0.5 times the wall thickness.

Bosses (for Screws & Fasteners)

1. Boss diameter: 2–3× screw diameter.

2. Wall thickness of the boss should be no more than 60% of the main part thickness.

Undercuts & Side Actions

1. Minimize undercuts to simplify tooling and reduce costs.

2. If unavoidable, use side actions or lifters in the mold.

Gate Placement

1. Position gates near the thickest section of the part to ensure proper flow.

2. Avoid placing gates near weak or cosmetic areas to prevent defects.

Tolerance Considerations

1. Typical tolerances: ±0.05 mm – ±0.2 mm, depending on part size and material.

2. Critical dimensions should allow slight variations to improve manufacturability.
TonZa Making | Injection Molding

Materials for Injection Molding

We source high-quality raw materials, offering over 50 types of thermoplastics and thermosetting plastics for injection molding. Our materials cater to various industries, including medical, new energy, consumer electronics, and daily essentials.

Customers can confidently select the right materials and focus on product manufacturing.

Rigid Materials

Rigid plastics are commonly used in injection molding for their strength, durability, and structural stability. Here are some of the most widely used rigid materials:

Tipical: ABS, ABS+PC, LCP, Nylon 6, Nylon 66, Nylon 11, Nylon 12, PBT, PC, PE, PEI, LDPE, HDPE, PET, PP and etc

Elastic Materials

It also known as elastomers, offer flexibility, durability, and excellent impact resistance. These materials are commonly used for parts requiring elasticity, or soft-touch surfaces.

Tipical: EPDM, PEBA, TPE, TPU, TPV, LSR and etc.

Surface Finishes

We provide SPI surface finishes for injection-molded parts. Our experts are ready to help you select the ideal finish for your project.

Name SPI Guide R.A Value Applications Material
Glossy A1 Grade #3 Diamond 0-1 Lens / Mirror – requires 420 SS material Acrylic
Glossy A2 Grade #6 Diamond 1-2 High-gloss polished parts. Acrylic, PC
Glossy A3 Grade #15 Diamond 2-3 High-gloss polished parts. ABS, Acrylic. PS, Nylon, PC
Semi-glossy B1 600 Grit paper 2-3 Medium Polish ABS, Acrylic, PP. PS, HDPE, Nylon, PC
Semi-glossy B2 400 Grit paper 4-5 Medium Polish ABS, Acrylic, PP. PS, HDPE, Nylon, PC
Semi-glossy B3 320 Grit paper 9-10 Med – Low polish ABS, Acrylic, PP. PS, HDPE, Nylon
Matte C1 600 Stone 10-12 Low Polish ABS, Acrylic, PP. PS, HDPE, Nylon, TPU
Matte C2 400 Stone 25-28 Low Polish ABS, Acrylic, PP. PS, HDPE, Nylon, TPU
Matte C3 320 Stone 38-42 Low Polish ABS, Acrylic, PP. PS, HDPE, Nylon, TPU
Textured D1 Dry Blast Glass Bead 10-12 Satin finish ABS, PP. PS, HDPE, Nylon, PC, TPU
Textured D2 Dry Blast # 240 Oxide 26-32 Dull Finish ABS, PP. PS, HDPE, Nylon, TPU
Textured D3 Dry Blast # 24 Oxide 190-230 Dull Finish ABS, PP. PS, HDPE, Nylon, TPU

Process Work

We simplify your order process, from online quotes to precision mold making and production-ready plastic parts. With our expert team and advanced machinery, we ensure efficiency and on-time delivery.

01

Upload Design File

Upload your 3D CAD files and 2D drawings to our platform to initiate precise custom molding.

02

Quotation

Select your materials, surface finishes, and shipping options to receive a detailed quote.

03

Place an order

Customer place an order include qty, price,  delivery date, and other business.

04

DFM

Customer receive manufacturability feedback within 24 hours.

05

Make the mold

Arrange production mold, ensure quality

06

T0 (first time test molding)

check that it matches drawings,  tolerance,  color, and adjust mold and injection process.

07

T1 (second test molding)

Verify if the issue is resolved and make further adjustments if needed.

08

Confirm samples

Obtain customer approval to ensure every detail meets the specifications.

09

Manufacturing

Once you approve the T1 sample, we begin full-scale production, ensuring high quality and precision throughout.

10

Deliver

We deliver your parts directly to your doorstep, ensuring they are ready for immediate use.

TonZa Making | Injection Molding

FAQ

We provide SPI surface finishes for injection-molded parts. Our experts are ready to help you select the ideal finish for your project.

We provide over 50 types of thermoplastics and thermosetting plastics, including ABS, PC, PP, PEEK, Nylon, TPU, and more, suitable for various industries such as medical, automotive, and consumer electronics.

Yes! Our experts can recommend the best material based on your product’s functionality, durability, and cost requirements.

We offer SPI surface finishes, including high-gloss, matte, textured, and custom finishes, to meet your aesthetic and functional needs.

Simply upload your 3D CAD files and 2D drawings to our platform, select materials and surface finishes, and receive a detailed quote within 24 hours.

 

 

 

 

Yes, we offer free and automatic DFM feedback within one day to optimize your design for cost-effective and high-quality production.

 

 

 

 

Lead times vary based on project complexity, but T1 samples are typically ready within 2–4 weeks, with full-scale production following approval.

 

 

 

 

Yes, we specialize in both low-volume prototype runs and high-volume mass production, ensuring cost-effective solutions at any scale.

We provide injection molding services for industries including medical, automotive, aerospace, consumer electronics, new energy, and daily necessities.

Yes, we provide additional services such as overmolding, insert molding, ultrasonic welding, painting, and assembly to meet your complete manufacturing needs.

We follow strict quality control measures, including ISO 9001 standards, in-process inspections, and final product testing to ensure every part meets your specifications.

 

 

 

 

Blog

Welcome to our blog, where we share insights into various manufacturing processes.

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