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We deliver end-to-end injection molding solutions, from prototyping to mass production, ensuring precision and quality. Our advanced equipment and strict quality control guarantee dimensional accuracy and part performance.
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Trusted by Engineers and Purchasing Leaders at the World's Most Successful Companies
JS Precision has produced over 300,000 unique parts for more than 1,000 clients worldwide, helping bring their custom projects from concept to reality.
Our precision plastic injection molding delivers high-volume, consistent parts with excellent dimensional stability and surface finish for diverse industries.
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Overmolding combines multiple materials in a single process to enhance grip, sealing, or aesthetic appeal while improving product durability and functionality.
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Insert molding securely encapsulates metal or electronic components within plastic, reducing assembly steps and enhancing structural integrity.
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We design and build high-performance custom molds with optimized cooling and ejection systems to ensure longevity, efficiency, and consistent part quality.
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Two-shot molding enables complex, multi-material components in a single automated cycle, eliminating secondary assembly and improving product reliability.
LSR molding produces flexible, biocompatible, and heat-resistant parts ideal for medical, automotive, and consumer applications.
Micro molding specializes in ultra-precise, miniature components with tight tolerances, often used in medical devices, electronics, and micro-optics.
Gas-assisted molding creates hollow-section parts with reduced weight, minimal sink marks, and improved surface finish, ideal for large or structurally complex designs.
JS Precision provides a comprehensive range of injection molding secondary processes and precision finishing services, all executed to meet or exceed SPI standards. Our value-added post-molding solutions are designed to enhance the aesthetics, functionality, and performance of your plastic components.
Painting and coating enhance both the aesthetics and functionality of injection molded parts, providing UV resistance, durability, and EMI/RFI shielding.
Select from a wide range of engineering plastics for your injection molding project. Each material offers specific properties for performance, appearance, and cost.
ABS (Acrylonitrile Butadiene Styrene) is a strong, durable, and impact-resistant engineering thermoplastic. It offers excellent heat resistance and dimensional stability, making it a popular choice for automotive components, consumer electronics, and household goods.
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Upload Your FilesAt JS Precision, we offer a full range of SPI-standard surface finishes for injection molds to meet diverse aesthetic, functional, and textural requirements. The table below provides a complete reference of standard mold finish grades.
| SPI Grade | Finish | Method | Surface Roughness Ra (µm) | Typical Application | |
|---|---|---|---|---|---|
| SPI A | A-1 | Mirror gloss polish | 6000 Grit diamond buff | ~0.012–0.025 | Optical lenses, transparent components, cosmetic lenses |
| A-2 | High gloss polish | 3000 Grit diamond buff | ~0.025–0.05 | High-gloss surfaces, transparent parts, cosmetic enclosures | |
| A-3 | Fine gloss polish | 1500 Grit diamond buff | ~0.025–0.05 | Glossy covers, light guides, high-end consumer products | |
| SPI B | B-1 | Fine gloss polish | Grit paper #600 | ~0.05–0.10 | Smooth finish with slight texture, interior components |
| B-2 | Medium semi-gloss | Grit paper #400 | ~0.10–0.15 | Functional housings, parts with subdued gloss | |
| B-3 | Standard semi-gloss | Grit paper #320 | ~0.15–0.25 | Internal structural parts, functional surfaces | |
| SPI C | C-1 | Fine matte | Stone #600 | ~0.28–0.35 | Low-reflective surfaces, subtle texture applications |
| C-2 | Medium matte | Stone #400 | ~0.35–0.40 | Industrial housings, utility covers, low-cost finishes | |
| C-3 | Normal matte | Stone #320 | ~0.40–0.55 | Non-cosmetic functional parts, internal assemblies | |
| SPI D | D-1 | Fine satin texture | Dry blast glass bead #11 | ~0.55–0.80 | Grip surfaces, tool handles, gentle anti-glare finishes |
| D-2 | Medium texture | Dry blast oxide #240 | ~0.80–1.00 | Medium grip or masking textures, industrial enclosures | |
| D-3 | Normal texture | Dry blast oxide #24 | ~1.00–1.50 | Heavy-duty anti-slip surfaces, rugged equipment parts | |
At JS Precision, we make custom injection molding services streamlined and precise. From instant quoting to high-volume production of quality injection molded parts, our process is engineered for reliability, speed, and exceptional results.
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Begin your project by securely uploading your 3D CAD models and 2D drawings to our platform, initiating our automated manufacturability analysis and rapid quote generation.
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Our engineering team provides detailed Design for Manufacturability (DFM) feedback and a transparent online quote within 24 hours, including material selection and cost-optimization insights.
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We produce a first-article T1 prototype for your validation. This critical step ensures dimensional accuracy, material performance, and functional requirements are fully met before production.
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Upon your approval, we commence high-volume manufacturing using advanced injection molding presses and rigorous process controls to ensure consistent part quality and precision.
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Every batch undergoes stringent final inspection. Components are professionally packaged and shipped worldwide via our reliable logistics network, ensuring on-time delivery.
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Your order is fulfilled to specification. Our technical and customer support teams remain available for any post-production questions or future project collaboration.
JS Precision's global injection molding system integrates over 80 advanced precision machines with clamping forces ranging from 80 to 1300 tons, supported by dedicated engineering project managers. Our lean manufacturing process ensures consistent delivery of high-tolerance plastic prototypes and high-volume production parts, with worldwide shipping and complete supply chain visibility.
JS Precision delivers advanced injection molding solutions from prototyping to high-volume production for automotive, medical, and electronics industries, ensuring tight tolerances (to ±0.005mm) and accelerated lead times.
| Standards | Description |
|---|---|
| Maximum Part Size | 1500 × 1200 × 600 mm |
| Minimum Part Size | 5 × 5 × 5 mm |
| Part to Part Repeatability | ±0.05 mm |
| Mold Cavities | Single-cavity, multi-cavity, family molds, stack molds (up to 128 cavities). |
| Available Mold Materials | P20, H13, S136, 1.2344 tool steel, 7075 aluminum, copper alloys. |
| Production Volume Levels | Prototype (< 5,000 shots), low-volume (5K–50K shots), high-volume (1,000,000+ shots). |
| Mold Cavity Tolerance | ±0.015 mm |
| Secondary Operations | Mold texturing (VDI 3400), painting, IMD/IML, vacuum metallization, ultrasonic welding. |
| Undercuts | Y-type and L-type undercut solutions |
| Wall Thickness | 0.3 mm-8 mm (material dependent) |
| Draft Angle | 0.5°- 1.5° (smooth surfaces), +1°per 0.025mm texture depth. |
| Ribs / Gussets | 40% -60% of nominal wall thickness |
| Bosses | Outer diameter = 2.0–2.4×insert diameter. Height ≤ 3×diameter. |
| Lead Time | T1 samples in 10-12 working days, production tooling 4-6 weeks. |
Need a custom high-precision solution? Our engineering team provides DFM analysis, flow simulation, and process validation to ensure manufacturability and peak performance.
From high-strength automotive parts to biocompatible medical devices, precision injection molding enables complex, reliable components for diverse sectors. As a trusted injection molding supplier, JS Precision serves the following key industries with engineered solutions:
Durable structural and under-hood components such as ECU housings, fluid management systems, interior trim, and connector assemblies.
Lightweight, high-performance parts including interior panels, ducting, enclosures, and components meeting stringent safety and temperature standards.
Biocompatible, sterilizable devices and enclosures for surgical instruments, diagnostic equipment, drug delivery systems, and implantable casings.
Precision enclosures, protective covers, and internal components for wearables, smart home devices, connectors, and sensor housings.
Robust functional parts such as gear housings, guards, connectors, and components for power tools, automation, and fluid handling systems.
High-volume, aesthetic-critical items including cosmetic containers, dispensing systems, razor bodies, and ergonomic handheld products.
JS Precision collaborates with innovators across medical, automotive, consumer electronics, and industrial sectors. From startups to global brands, we deliver precision injection molding solutions trusted for quality, reliability, and scalability.
This project showcases how precision molding, rigorous validation, and supply chain integration enable complex, high-tolerance medical components. It reflects our commitment to supporting healthcare innovators with scalable, regulatory-ready manufacturing.
This project demonstrates how advanced material selection, rigorous testing protocols, and precision molding deliver components that meet stringent aerospace standards. It showcases our capability to support mission-critical applications where safety, weight, and performance are paramount.
This engagement highlights seamless integration of complex aesthetics, material performance, and high-volume manufacturability. It exemplifies our role in helping consumer brands rapidly scale innovative designs to market with uncompromising quality.
This case study illustrates how engineered polymers and robust design for manufacturability (DFM) create components that endure extreme conditions. It underscores our commitment to enhancing equipment reliability and longevity for industrial applications.
From raw material verification to final part inspection, our multi-tiered quality management system ensures zero-defect delivery for every injection molding project, supporting mission-critical applications across automotive, medical, and electronics industries.
Our injection molding processes are factory-certified under ISO 9001, IATF 16949, ISO 13485, and UL 94 flammability standards, ensuring full compliance with global automotive, medical, and consumer electronics regulatory and safety requirements.
Equipped with CMMs, automated vision systems, and real-time process monitoring, our quality team executes 20+ inline checks per hour including dimensional verification, CT scanning, and warpage analysis to eliminate latent defects and guarantee ±0.005mm repeatability.
An integrated MES tracks 100% of production data from mold setup to packaging. Each batch carries QR code traceability for instant access to material certifications, first-article reports, and full PPAP documentation.
JS Precision delivers end to end custom injection molding solutions, from precision mold making to final part manufacturing. Our integrated process reduces lead times and ensures reliable project execution for your production needs.
Our specialists provide flexible manufacturing support, whether for prototype development or high volume production runs, ensuring a solution tailored to your project scale and timeline.
With no MOQ requirements, we offer cost effective manufacturing for prototype and low volume production, reducing initial investment and enabling scalable order flexibility.
Our engineering team performs expert design for manufacturability review and provides detailed competitive quotations. Upon approval, we proceed with precision manufacturing to guarantee quality and fast turnaround.
All information and uploads are secure and confidential.
Get Your Instant QuoteInjection molding is a high-precision, high-volume manufacturing process for producing identical plastic or metal components. The following three points outline its core principles, economic rationale, and key advantages.
The process involves injecting molten plastic or metal feedstock into a precision-engineered mold cavity under high pressure. The material is then rapidly cooled and solidified, after which the finished part is ejected. This cycle is highly automated and repeatable, making it the foremost method for mass-producing complex, net-shape plastic components with exceptional dimensional accuracy.
Compared to prototyping methods like CNC machining or 3D printing, injection molding requires a significant initial investment in custom mold tooling. This cost is efficiently distributed across high-volume production runs, resulting in the lowest per-part cost at scale. This makes it the most cost-effective solution for commercial and industrial volume manufacturing.
The process supports an extensive range of engineering-grade materials, including thermoplastics, thermosets, and Liquid Silicone Rubber (LSR). Materials can be compounded with additives to meet specific performance requirements. Crucially, by utilizing the same precision mold for an entire production lot, injection molding guarantees high consistency, repeatability, and reliable part quality across thousands or millions of units.
Stay informed with the latest updates and announcements from JS Precision. Learn about our most recent projects.
Our typical lead time for injection molded parts is 1 week, depending on the complexity and volume of the order. For expedited services, we can deliver parts as fast as 1-3 days.
Yes, we offer a variety of custom surface finishes including texturing, polishing, painting, and electroplating to meet your specific requirements.
We implement rigorous quality control measures throughout the manufacturing process, including in-process inspections, final inspections, and the use of precision measurement tools such as CMM (Coordinate Measuring Machine). Our commitment to quality is further demonstrated by our ISO 9001 certification.
Yes, our injection molding services are scalable to meet your specific volume requirements. Whether you need a single prototype or mass production, we have the capacity to handle orders ranging from 1 to 10,000+ units.
To receive a quote for your injection molding project, please submit your design files and specifications through our online form or contact our support team directly. We typically provide quotes within 24 hours.
Yes, we have the capability to design and manufacture multi-cavity molds, which can improve production efficiency and reduce unit costs for high-volume orders.
Yes, we offer mold maintenance and repair services to extend the lifespan of your mold and ensure continuous production with minimal downtime.
Yes, our design-for-manufacturability (DFM) analysis helps optimize your part design for the injection molding process, improving quality, reducing costs, and ensuring manufacturability.
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