Injection Molding Services
High-Precision Custom Injection Molding Parts Manufacturer
✓ 68 advanced injection molding machines (50-2000T), including high-speed models from brands like Sumitomo、Fanuc and Haitian, plus 10 dual-color machines. We offer one-stop OEM/ODM Customization Services from injection molding, painting, electroplating, assembly to packaging, crafting high-quality precision injection-molded products for global customers.
✓ Direct-from-manufacturer factory, we guarantee rapid prototyping within 1 day and delivery within 2 days. We maintain strict quality control throughout the entire process from raw materials to final shipment, providing customized injection molding solutions with precise tolerances. Whether it’s high-precision components, complex structures, or parts with demanding surface finishes, we ensure every dimension meets drawing specifications with absolute accuracy.
✓ IMD, LML, 2K, overmolding, , transparent, high-gloss, high-gloss seamless, and other multi-process core technology services.
✓ We provide only 100% qualified parts, strictly adhering to the ISO9001 quality management system. All project data is systematically recorded and fully traceable throughout the entire process.
✓ Professional engineers offer one-on-one service with rapid response to your needs. Bulk orders receive 24/7 efficient delivery to ensure timely arrival.
✓ Single-cavity and multi-cavity injection molding
✓ 2K/3K Injection Molding
✓ IMD&IML Injection Molding
✓Transparent Injection Molding
✓ Gas-assisted injection molding
✓ Vacuum injection molding
✓ High-gloss/High-gloss seamless injection molding
✓ Molded Insert Injection Molding
Materials:
- PP
- PA
- POM
- PBT
- TBE/TPV/TPU
- PE
- PET
- PC
- PMMA
- PC/ABS
- PEI
- ABS
- PEEK
- LSR silicones
- Other materials
We also offer other services, such as:
- SPI（A1、A2、A2、B1、B2、B3、C1、C2、C3、D1、D2、D3）
- VDI （12、15、18、21、24、27、30、33、36、39、42、45）
- Laser engraving
- Pad printing
- Screen printing
- Electroplating
- Paint
- Thread inserts
- Water Transfer Printing
- carbon fiber
Machining accuracy
±0.01mm/100mm
Maximum forming dimensions:
2000mm × 1500mm
Why choose XINXIU for injection moulding?
XINXIU has been specialising in the field of injection moulding for over 20 years. Building on a scientific management system and large-scale manufacturing capabilities, we provide clients with end-to-end services ranging from product development to mass production. We specialise in core processes such as 2K/3K two-colour injection moulding, IMD/IML in-mould decoration, transparent injection moulding and insert moulding, whilst integrating surface treatments—including spray painting, electroplating, screen printing and laser engraving—along with assembly and packaging into a one-stop service. Clients need not coordinate with multiple suppliers; we manage the entire process, ensuring seamless integration at every stage to facilitate rapid product launch, whilst guaranteeing the optimal balance of cost, quality and delivery times for every project.
20+Industry experience
(year)
A team of senior engineers
Strict quality control
On-TimeDelivery
No minimum order quantity
All uploads are secure and confidential
Our Injection Molding Advantages
Smart DFM Analysis
Every quote includes a free DFM report. Our engineering team deeply analyzes your 3D CAD model, accurately identifying potential Shrink marks, weld lines, warping, air bubbles and provides specific structural optimization suggestions. Clear production obstacles before molding and reduce processing costs.
Lightning-Fast Delivery
Relying on our 15,000㎡ production base with 100+ machines, we achieve 7-day mold manufacturing, 1-day injection sampling, and 2-day mass production. With 80 precision molds monthly, some orders ship the next day — compressing development cycles from weeks to days.
Zero MOQ Flexible Supply
We implement an on-demand purchasing model with no minimum order quantity. No inventory pressure — flexibly respond to market fluctuations, emergency line replenishment, or product customization needs. Economical support for bridge production and line-down emergencies.
Full-Cycle Technical Support
From prototype to mass production, our professional team tracks every step. We provide molding process development reports, critical dimension inspection (including 9 GD&T symbols), CTQ key characteristic identification, and 30-sample process capability studies — ensuring every step is clear and controllable.
Strict Quality Control
ISO9001 and IATF16949 certified, mold precision up to ±0.002mm, T1 first attempt pass rate exceeding 90%. Constant-temperature workshop processing, ERP system control. Full traceable documentation: material certificates, RoHS reports, CMM reports, first article inspection reports, and more.
360° Worry-Free Service
24/7 online response. Pre-sales: selection and DFM consulting. In-process: MAS system tracking mold progress with two proactive updates weekly. After-sales: lifelong free mold repair, maintenance, and spare parts replacement. Rapid response mechanism ensures complete peace of mind.
Rapid Injection Molding Process
2K/3K injection moulding
Insert injection moulding
Air-assisted Injection Molding
IMD&IML Injection Molding
Transparent Injection Moulding
We use highly transparent plastics such as PC and PMMA, combined with high-quality mold steel and high-precision molding processes, to produce highly transparent components free of bubbles, flow marks, and internal stress. XINXIU has extensive experience in transparent injection molding and specializes in materials such as PC, PMMA, PET, and PS, effectively resolving issues such as white haze, silver streaks, and bubbles. Equipped with Sumitomo high-speed injection molding machines and a dust-free production facility, we ensure high surface finish and optical clarity, with light transmittance exceeding 90%.
2K/3K injection moulding
2K/3K two-colour injection moulding technology enables the sequential moulding of two or three different materials on a single machine, facilitating complex product designs that combine soft and hard materials and feature multi-colour combinations. As this process eliminates the need for subsequent assembly, it significantly enhances production efficiency and product reliability, and is widely used in sectors such as automotive interior components, power tool handles, two-colour handles for consumer goods, and buttons for electronic devices. XINXIU is equipped with 10 specialised two-colour injection moulding machines, capable of meeting custom requirements for a wide range of two- and three-colour products.
Insert Moulding
Insert molding involves placing various metal inserts (copper, stainless steel, aluminum), threaded inserts, terminals, and other pre-installed components into a mold, where they are encapsulated and secured by molten plastic, thereby achieving the integration of different materials into a single unit. XINXIU possesses extensive experience in insert molding. We utilize high-precision automated positioning fixtures and secure inserts via magnetic or vacuum suction, ensuring precise positioning and no displacement during the injection molding process, with threaded hole alignment accuracy of ±0.01 mm.
IMD/IML In-Mould Decoration and In-Mould Label
IMD (In-Mold Decoration) and IML (In-Mold Labeling) technologies involve placing pre-printed films or labels into a mold and molding them together with molten plastic, resulting in a permanent bond between the decorative layer and the product. XINXIU specializes in IMD/IML mold design and molding processes, enabling precise control over film positioning and molding pressure to ensure accurate placement of the decorative layer, clear patterns, and a strong bond. These technologies are suitable for products with high requirements for appearance and durability, such as home appliance control panels, mobile phone casings, automotive dashboards, and medical device panels.
Overmoulding
XINXIU’s overmoulding injection moulding process enables precise control over the moulding of both the hard base material and the soft overmoulded layer, ensuring a strong bond between the two materials and accurate positioning. Our team of engineers are experts in overmoulding mould design and process parameter optimisation, and are able to develop the optimal injection moulding solution for combining hard and soft materials based on product functionality requirements and material properties.
Injection Moulding of Threaded Plastic
Threaded plastic components are widely used in bottle caps, tubing fittings, fasteners, medical connectors, automotive sensors and various other plastic parts that require assembly and disassembly. XINXIU possesses extensive experience in the injection moulding of threaded plastic components and can provide a range of solutions, including direct thread moulding, insert moulding with threads and post-processing of threads.
Guide to Selecting Thermoplastic Materials
We offer a wide selection of over 100 thermoplastic and thermosetting materials, covering general-purpose plastics, engineering plastics, high-performance specialty plastics and elastomers. We can recommend the most suitable material solutions based on your product’s functional requirements, operating environment, budget and production scale. If you are looking for alternative materials, please refer to our guides on ABS, PC/ABS, PC, PET and other common plastic resins.
Material Certification Support: Full certification documentation is available for all materials, including Technical Data Sheets (TDS), Certificates of Conformity (COC) and Certificates of Analysis (COA), ensuring clear material provenance, reliable performance and verifiable compliance.
ABS injection moulding
ABS is an acrylonitrile-butadiene-styrene copolymer that combines chemical resistance, toughness and surface gloss, offering excellent overall performance.
✓ Advantages: High strength, good toughness, excellent surface gloss, good processability, good dimensional stability, excellent low-temperature performance (-20°C), good electrical insulation properties, and good value for money.
✓ Limitations: Poor weather resistance; modification is required for outdoor use; limited heat resistance (HDT ~90–100°C); poor UV resistance; flammable and requires flame-retardant modification.
PC injection moulding
PC is a high-performance engineering plastic renowned for its excellent transparency, impact resistance and heat resistance, and is often referred to as ‘transparent metal’.
✓ Advantages: Light transmittance of over 90%, excellent impact resistance, good heat resistance (HDT ~120–130°C), dimensional stability, and optional flame retardant grades.
✓ Disadvantages: Requires strict pre-drying prior to processing (moisture content ≤0.02%); relatively poor chemical resistance; low surface hardness making it prone to scratching; and a relatively high price.
PC/ABS injection moulding
PC/ABS alloys are blends of polycarbonate and ABS, combining the impact resistance and heat resistance of PC with the processability and flow properties of ABS.
✓ Advantages: Balanced stiffness and toughness, excellent overall performance, superior heat resistance compared to ABS (HDT ~110–120°C), good impact resistance, dimensional stability, and high surface gloss.
✓ Disadvantages: Poor chemical resistance, susceptible to solvent attack; high moisture absorption requiring pre-drying; higher cost than ABS; average weather resistance requiring modification.
PET injection moulding
PET is a versatile thermoplastic renowned for its strength, transparency and chemical resistance. It is primarily classified into two forms: amorphous PET (A-PET) and crystalline PET (C-PET).
✓ Advantages: Excellent transparency, high tensile strength (50–60 MPa), good chemical resistance, FDA food-grade certification, 100% recyclable, outstanding gas barrier properties, and good dimensional stability.
✓ Disadvantages: Requires thorough pre-drying prior to processing (moisture content ≤0.005%), limited heat resistance (HDT ~70°C), susceptible to UV degradation without stabilisers, crystallisation can affect transparency, and processing temperatures are higher than for many other plastics.
PMMA injection moulding
PMMA, commonly known as acrylic or plexiglass, is a thermoplastic material characterised by high transparency and excellent weather resistance.
✓ Advantages: Light transmittance of over 92%, excellent optical properties, high surface hardness and scratch resistance, strong weather resistance and UV resistance, and lower cost than PC.
✓ Disadvantages: Poor impact resistance and high brittleness, notch sensitivity leading to easy cracking; limited heat resistance (HDT ~70–100°C); moderate chemical resistance, susceptible to attack by organic solvents.
pp injection moulding
PP is a lightweight thermoplastic characterised by low density, good chemical resistance and cost-effectiveness; it is widely used in food packaging and everyday consumer goods.
✓ Advantages: Low density offering significant weight-saving benefits; good chemical resistance to acids and alkalis; food-grade and FDA-certified; low cost; excellent fatigue resistance, making it suitable for hinge designs.
✓ Disadvantages: Limited heat resistance (HDT ~60–100°C); poor low-temperature toughness and prone to embrittlement; high shrinkage (1.5–2.5%); low surface gloss; and poor UV resistance.
Download ourGuide to Injection Moulding Design
Our fundamental guidelines for injection moulding encompass key design considerations aimed at enhancing part manufacturability, optimising appearance and reducing overall production time. A scientifically sound injection moulding design must take full account of product functionality, mould structure, material properties and the moulding process, thereby preventing common defects such as sink marks, weld lines and warping at the source.
Injection Molding Equipment and Automation
Quality Control
Surface treatment of injection-moulded parts
Through appropriate post-processing techniques, we not only enhance the visual appeal of our products but also impart practical functionalities such as wear resistance, slip resistance, and corrosion resistance. Tailored to diverse application scenarios and client requirements, we offer a range of surface treatment solutions to ensure each product delivers the desired outcome.
Mould texture
Direct moulding of texture, eliminating the need for secondary processing.
spray coating
Achieve a variety of finishes including gloss, matt and rubberised paint
Electroplating
Endow plastic components with a metallic finish to enhance wear resistance.
polishing
Enhance surface finish to achieve a mirror-like effect
sandblasting
Achieve a uniform matt finish on the surface, enhancing adhesion.
Silk-screen printing/Pad printing
Printed text and logos, clear and long-lasting
UV coating
High hardness, scratch-resistant, high gloss
Laser engraving
Permanent marking, suitable for intricate patterns
Custom Projects
Automotive injection-molded parts
XINXIU provides high-precision injection-molded parts for the automotive industry, including interior trim, exterior trim, and functional structural components. With over 20 years of injection molding experience and IATF 16949 quality system certification, we meet the automotive industry’s stringent requirements for product precision, heat resistance, weather resistance, and long-term reliability. We collaborate closely with renowned automotive parts suppliers both domestically and internationally, having accumulated extensive experience in lightweight design, precision molding, and surface treatment, thereby helping our customers enhance their product competitiveness.
Case Study: Gas-Assisted Injection Molding of Audi Rearview Mirrors
Automotive Custom Injection-Molded Parts Case Study
Medical injection-molded parts
XINXIU has been deeply involved in the medical injection molding sector for many years and possesses extensive experience in the production of medical device components. We hold significant advantages in terms of development depth, manufacturing capabilities, and industry expertise. We strictly adhere to the ISO 13485 quality management system and operate medical-grade cleanrooms to ensure our products meet biocompatibility requirements and satisfy the medical industry’s high standards for cleanliness, precision, and reliability. Thanks to our professional service capabilities, XINXIU has become a long-term partner to numerous global medical device manufacturers.
Custom Case Study: High-Pressure Syringe
Custom Medical Blood Collection Tube Case Study
Electronic Injection-Molded Parts
The 3C electronics industry imposes strict requirements on the precision, flame retardancy, heat resistance, and appearance of injection-molded parts, while also demanding rapid product iteration and short lead times. XINXIU provides high-precision injection-molded parts for the electronics industry, equipped with 68 advanced injection molding machines and a daily production capacity of 300,000 units. We are able to respond quickly to product iteration and urgent delivery needs, offering end-to-end support from prototyping to mass production, helping our customers seize market opportunities.
(Two-Tone) Custom 2K Phone Case Case Study
Custom Drone Propeller Case Study
Injection-Molded Parts for Home Appliances
Home appliances place high demands on the surface quality, dimensional stability, and durability of injection-molded parts, particularly large-sized panels, which require a high-gloss, seamless finish. XINXIU provides injection-molded parts with high aesthetic standards for the home appliance industry. We specialize in high-gloss injection molding, transparent injection molding, and gas-assisted injection molding. We produce high-quality aesthetic parts featuring large dimensions, high surface finish, and no weld lines, meeting the dual demands of surface quality and durability for home appliances and helping our customers create exquisite products.
Custom Communication Display Panel Case Studies
Custom Printer Accessories Case Studies
Transparent Injection-Molded Packaging Components
5. Transparent Injection-Molded Packaging Components
XINXIU provides high-precision injection-molded components for the packaging industry. Using food-grade materials, we manufacture highly transparent, odorless packaging containers made from PC, PCGT, PET, and PMMA that meet food contact standards. Our products are 100% recyclable. With our efficient production capabilities, we can meet the demand for rapid delivery of large volumes.
Custom Coffee Machine Water Tank Case Study
Custom Transparent Packaging Box Case Studies
Automotive injection-molded parts
XINXIU provides high-precision injection-molded parts for the automotive industry, including interior trim, exterior trim, and functional structural components. With over 20 years of injection molding experience and IATF 16949 quality system certification, we meet the automotive industry’s stringent requirements for product precision, heat resistance, weather resistance, and long-term reliability. We collaborate closely with renowned automotive parts suppliers both domestically and internationally, having accumulated extensive experience in lightweight design, precision molding, and surface treatment, thereby helping our customers enhance their product competitiveness.
XINXIUCustom Audi Side Mirror Gas-Assisted Injection Molding Case Study
XINXIU Automotive Custom Injection-Molded Parts Case Study
Frequently Asked Questions (FAQ) on Injection Moulding
- What is the minimum order quantity for injection-moulded parts?
- XINXIU operates a zero minimum order quantity policy, accepting orders from as little as one piece. Whether for prototype validation or small-batch trial production, we can respond flexibly.
- What level of precision can be achieved for injection-moulded parts?
- injection-moulded parts can achieve a precision of ±0.01mm/100mm, with mould precision of ±0.002mm, meeting the requirements for high-precision components.
- What is the lead time for injection-moulded parts?
- We offer a 1-day rapid prototyping service and 2-day batch delivery. The mould production cycle is approximately 7 days, and we can produce 80 sets of precision moulds per month.
- How do you ensure transparent injection-moulded parts are free from bubbles and flow marks?
- Through precision mould design, thorough material drying (moisture content ≤0.02% for PC and ≤0.005% for PET) and a precise temperature control system, we ensure transparent parts are free from bubbles and flow marks, with high light transmission.
- What surface treatments are available for injection-moulded parts?
- We offer a comprehensive range of surface treatment services, including spray painting, electroplating, screen printing, laser engraving, IMD/IML in-mould decoration, high-gloss texturing, sandblasting and UV coating.
- How can I obtain a quotation for injection-moulded parts?
- Please provide 3D drawings (in STP or IGS format), quantity, material specifications and surface treatment requirements. We will provide you with a free quotation and DFM analysis report within 12 hours.