Precision CNC Machining, Rapid prototyping, and Custom parts
Injection Molding Service2025-11-05T16:13:20+08:00

Injection Molding Services for Custom Parts

Custom injection molding for plastic prototypes and on-demand production parts in as fast as 7 day.

  • Custom parts for any volume

  • From mold to market – free DFM, fast & precise

  • Wide choice of materials & finishes.

  • Engineers with proven expertise

  • Mastering complex geometries

  • Free T0 sample – no risk

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Thumbnail of a CNC machined part based on technical drawing

STEP  STP  SLDPRT  IPT  PRT  SAT  IGES  IGS  CATPART  X_T  OBJ  STL

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Polaris logo representing a client for whom HorizonRP provided precision manufacturing and custom engineering solutions.
Medtronic logo representing a client for whom HorizonRP provided precision manufacturing and custom engineering solutions.
John Deere logo representing a client for whom HorizonRP provided precision manufacturing and custom engineering solutions.
Blue Origin logo representing a client for whom HorizonRP provided precision manufacturing and custom engineering solutions.
Sonos company logo representing HorizonRP’s partnership in providing precision manufacturing and custom component solutions.

Our injection Molding Capabilities

Horizon makes your transition from prototype design to mass production molds faster and more efficient.Backed by a nationwide network of trusted suppliers and injection molding machines ranging from 90 to 800 tons, we can deliver high-quality, cost-effective plastic parts within just a few days.Our services cover precision mold manufacturing, overmolding, and insert molding, all supported by a team of professional engineers.With Horizon’s one-stop production workflow, you can accelerate time-to-market, ensure product consistency, and maintain cost efficiency while keeping the flexibility to scale production as needed.

Transparent acrylic parts produced by injection molding

Plastic Injection Molding

From sleek prototypes to high-volume production, our injection molding delivers precision, durability, and flawless finishes—fast. Perfect for creating parts that look great and perform even better in consumer products, automotive, electronics, and more.

Food-grade silicone parts designed for safe use by babies, produced via injection molding

Liquid Silicone Rubber Molding

From intricate prototypes to end-use parts, our LSR molding offers exceptional flexibility, clarity, and biocompatibility—fast. Ideal for applications demanding durability, heat resistance, and precision in medical, automotive, electronics, and consumer products.

Overmolding

Seamlessly combine materials for strong, durable, and visually striking parts. Our overmolding process delivers reliable bonds and flawless finishes for consumer products, tools, electronics, and automotive components—fast.

Insert Molding

Integrate metal or other components directly into molded parts for unmatched strength and precision. Our insert molding service ensures tight tolerances, long-lasting performance, and reduced assembly time for automotive, electronics, and industrial applications.

Why Choose Horizon?

  • One-Stop Injection Molding Service

    Horizon offers a complete solution from custom mold design to finished part delivery.

    Through streamlined production processes and efficient collaboration, we minimize communication gaps and shorten lead times, enabling your projects to be completed faster and more efficiently.

  • Flexible Solutions

    Guided by a team of experienced molding experts, Horizon delivers the right solution for every stage — from rapid aluminum tooling for quick prototypes to durable molds built for high-volume production.

  • No Minimum Order Requirements

    At Horizon, you have complete freedom to order only what you need.

    With no minimum order quantity, we provide a cost-efficient solution for both prototyping and low-volume production—eliminating large upfront commitments and giving you total manufacturing flexibility.

  • Expert Review and Quotation

    Horizon’s engineering team will review your design and deliver a clear, detailed quotation.

    Once quantities and pricing are approved, production begins immediately—combining accuracy with rapid turnaround to keep your project on schedule.

Why Choose Injection Molding?

Precision Molding, Fast Results

Injection molding is the go-to solution for producing high-quality plastic parts at scale. By injecting molten plastic or metal into precision molds and rapidly cooling them, this process delivers consistent, durable parts with flawless finishes—fast.

Higher Volumes, Lower Costs

While injection molding requires an initial investment in tooling, the cost per part drops dramatically in high-volume production, making it the most cost-effective choice for mass manufacturing.

Endless Material & Color Options

Our injection molding supports a wide range of materials—including thermoplastics, thermosets, and select metals—and allows customization with pigments and functional additives.

Unmatched Consistency & Repeatability

With the same mold used throughout production, every part achieves unmatched consistency and repeatability.

 

 

How Does Horizon Injection Molding Process Work

At Horizon, custom injection molding has never been easier or more efficient.
We provide a full end-to-end service—from online quoting to mass production part delivery—powered by a precise, fast, and reliable manufacturing system that helps you bring products to market faster.

Our ordering process

Custom a new Injection Molding Project now!

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Injection Molding Materials

  • TPU

    Thermoplastic Polyurethane (TPU) for CNC Machining HorizonRP offers high-quality Thermoplastic Polyurethane (TPU) material, known for its flexibility, durability, and resistance to abrasion and chemicals. Ideal for CNC machining applications, TPU is widely used across various industries, including automotive, medical, and consumer electronics.

    CNC machined TPU automotive seals and gaskets
  • PC+ABS

    PC/ABS (Polycarbonate‑ABS Blend) Plastic Material PC+ABS is a blend-modified material that combines the advantages of both materials. It not only inherits the high impact resistance of PC but also the material strength of ABS, while improving its heat resistance. It is often used in electronic product casings, automotive interiors, consumer products, and more.

    PC/ABS plastic pellets for prototyping and molding
  • CPVC

    CPVC (Chlorinated Polyvinyl Chloride) Plastic Material CPVC (Chlorinated Polyvinyl Chloride) is a modified form of PVC, with enhanced thermal stability, mechanical properties, and chemical resistance. These upgraded characteristics make CPVC an excellent choice for applications in high-temperature and corrosive environments where ordinary PVC would fail.

    CPVC plastic material offering excellent heat and corrosion resistance for industrial and plumbing applications
  • PC+GF

    PC+GF(Glass‑Fiber Reinforced Polycarbonate) Material PC+GF (polycarbonate + glass fiber reinforced composite material) is a reinforced engineering plastic made by adding glass fiber (abbreviated as GF) to a polycarbonate (PC) matrix. The addition of glass fiber can significantly improve the mechanical properties and stability of pure PC while retaining some of PC’s excellent inherent properties, making

    PC GF glass-fiber reinforced polycarbonate pellets
  • PEI

    PEI (Polyetherimide) Engineering Material PEI (polyetherimide) is a high-performance thermoplastic known for excellent heat resistance, mechanical strength, and chemical stability. It is widely used in demanding applications across aerospace, electronics, medical, and industrial fields.

    PEI polyetherimide engineering plastic pellets
  • PTFE

    PTFE Polytetrafluoroethylene (PTFE), commonly known as Teflon, is a high-performance fluoropolymer. It is frequently used in mechanical components requiring reduced friction and wear—such as bearings, gears, and piston rings—due to its non-stick properties, low friction characteristics, and self-lubricating capabilities. PTFE also exhibits excellent electrical insulation properties, making it highly suitable for applications like high-frequency cables,

    PTFE(Polytetrafluoroethylene) plastic material with excellent chemical resistance and low friction for precision machined components
  • LDPE

    LDPE Low-Density Polyethylene (LDPE) is lighter than water, soft and tough, with excellent acid and alkali resistance as well as electrical insulation properties. It is widely used in fields such as packaging, agriculture, electronics, and daily necessities.

    LDPE plastic material with excellent flexibility and chemical resistance for injection molding and packaging applications.
  • PP

    PP Polypropylene (PP) is a well-balanced thermoplastic characterized by lightweight material, excellent chemical resistance, and good flexibility. Owing to these properties, it finds wide application in fields such as packaging, household appliances, automotive, daily necessities, and medical devices.

    PP injection molding plastic material — durable, chemical-resistant polypropylene for precision-molded components.
  • PET

    PET PET (polyethylene terephthalate) is a common thermoplastic polyester with excellent mechanical properties and strong chemical resistance. It also offers glass-like transparency and luster, with a high light transmittance of about 88–92%, and is widely used in beverage bottles, food packaging, and engineering plastics.

    Transparent PET plastic material sheet used for durable and lightweight molded parts.
  • PVC

    PVC (Polyvinyl Chloride) Plastic Material Polyvinyl chloride (PVC) is a widely used thermoplastic polymer material characterized by excellent mechanical properties, outstanding corrosion resistance, and superior electrical insulation performance. By incorporating various additives, it can be tailored to meet customized requirements. Owing to its unique combination of properties, PVC finds extensive applications in fields such as

    PVC resin pellets for industrial applications
  • PC

    PC (Polycarbonate) Engineering Material PC (polycarbonate) is a versatile engineering plastic known for its high impact resistance, optical transparency, and good thermal stability. It combines toughness, heat resistance, and aesthetic clarity, making it suitable for a wide array of applications.

    PC polycarbonate resin pellets
  • PMMA (Acrylic)

    PMMA (Acrylic) Engineering Material Acrylic (also known as polymethyl methacrylate, PMMA) boasts not only excellent optical performance but also outstanding UV resistance. With a light transmittance of up to 92%—comparable to glass—it has become a popular material in scenarios ranging from neon signs in shopping malls and display case panels in museums to precision optical

    Clear PMMA acrylic sheet for optical applications
  • PEEK

    PEEK (Polyetheretherketone) Engineering Material PEEK (polyetheretherketone) is a premium thermoplastic widely recognized for its exceptional thermal stability, mechanical strength, chemical resistance, dimensional stability, and in many cases biocompatibility and electrical insulation. It is used in extreme environments like aerospace, medical implants, electronics, and semiconductor industries.

    PEEK polyetheretherketone resin pellets
  • Nylon

    Nylon (Polyamide) Engineering Material Nylon (polyamide) is a versatile engineering thermoplastic known for its high strength, excellent wear resistance, good chemical stability, and toughness. It is widely used across industries for gears, bearings, bushings, automotive components, industrial parts, and more. Its ease of machining, coupled with its chemical resistance, also makes it suitable for applications

    Nylon polyamide resin pellets
  • POM

    POM (Polyoxymethylene / Acetal) Engineering Material POM (polyoxymethylene), also known as acetal, is a high‑performance engineering thermoplastic valued for its rigidity, low friction, excellent wear resistance, and good dimensional stability. It is often used in precision mechanical parts that require durable, low‑maintenance performance.

    POM acetal resin pellets
  • HIPS

    HIPS (High Impact Polystyrene) Material HIPS, or High Impact Polystyrene, is a modified polystyrene polymer enhanced with rubber modifiers (usually polybutadiene) to improve toughness and durability. The result is a rigid yet impact-resistant thermoplastic that retains good processability, making it popular in prototyping, manufacturing, and consumer products. HIPS combines the stiffness of polystyrene with improved

    High-impact polystyrene (HIPS) plastic material used for durable and cost-effective injection molded parts
  • HDPE

    HDPE (High-Density Polyethylene) Material High-Density Polyethylene (HDPE) is a thermoplastic polymer with high strength-to-density ratio, known for durability, chemical resistance, and ease of processing. As a semi-crystalline plastic, it offers excellent impact performance, low moisture uptake, and good machinability — making it a popular choice in industrial, chemical, packaging, and structural applications. It is great

    Machining HDPE component with CNC
  • ABS

    ABS (Acrylonitrile Butadiene Styrene) Material ABS (Acrylonitrile Butadiene Styrene) is a widely used engineering thermoplastic known for its excellent balance of strength, toughness, and processability. Because it combines rigidity from acrylonitrile and styrene with impact resistance from butadiene, ABS is commonly used in consumer products, enclosures, housings, and structural components.

    Machined ABS part on CNC

LSR Molding Surface Roughness Options

SPI A
Surface Roughness Ra(μm)
SPI A1Ra0.012 – Ra0.025
SPI A2Ra0.025 – Ra0.05
SPI A3Ra0.05 – Ra0.10
SPI B
Surface Roughness Ra(um)
SPl B1Ra0.05 -Ra0.10
SPl B2Ra0.10-Ra0.20
SPl B3Ra0.20-Ra0.28
SPI C
Surface Roughness Ra(um)
SPI C1Ra0.28 - Ra0.35
SPI C2Ra0.35 - Ra0.40
SPI C3Ra0.40 - Ra0.55
SPI D
Surface Roughness Ra(um)
SPI D1Ra0.55 - Ra0.80
SPI D2Ra0.80 - Ra1.00
SPI D3Ra1.00 - Ra1.50

Surface Finish Options

Metal part with surface finish achieved through screen printing, showing precise and decorative coating

Screen printing

Silk screen printing is a process that applies ink onto a product surface through a mesh screen. It’s widely used for logos, text, and patterns with strong adhesion and broad material compatibility.

Metal or plastic part with water transfer printed surface finish, showing decorative pattern and high-quality coating

Water transfer printing

Water transfer printing is a process that applies patterns to complex surfaces using a water-soluble film. It’s suitable for plastic, metal, and other materials, often used for decorative finishes.

Metal part with hot stamping surface finish, showing precise decorative coating and high-quality manufacturing

Hot stamping

Hot stamping is a decorative process that uses heat and pressure to transfer metallic foil onto the surface of plastic parts, enhancing visual appeal and brand recognition.

Sheet metal fabricated part with blue printed surface finish for customized appearance

Painting

A protective and aesthetic coating is applied to the surface, offering a smooth, uniform finish with customizable colors and textures. Silk screen printing is a process that applies ink onto a product surface through a mesh screen. It’s widely used for logos, text, and patterns with strong adhesion and broad material compatibility.

Industries Served by Injection Molding

Aerospace industry satellite illustration showing precision-engineered components, advanced satellite technology, and custom aerospace manufacturing.

Aerospace

From prototyping to high quality parts.

Automotive industry representation showing precision-engineered components, advanced manufacturing technology, and custom high-performance parts.

Automotive

Rapid prototyping and mass production for the automotive industry.

Plastic injection molded parts for consumer electronics applications, showing precision molding, custom design, and high-quality surface finish.

Consumer Electronics

Prototyping and on-demand production of consumer electronics products.

Medical industry representation showing precision-engineered components, advanced manufacturing technology, and custom healthcare solutions.

Medical

Accelerate your development of medical devices.

Injection Molding Resources

Metal or plastic part with water transfer printed surface finish, showing decorative pattern and high-quality coating

Design Considerations for Injection Molding

Injection molding of plastic decorative light housing with smooth finish and high dimensional precision.

A Bespoke Pendant Light: Crafting Perfection Through Innovation and Dedication

Customer Reviews

FAQs

Do You Offer Assembly Or Secondary Operations?2025-10-17T10:41:49+08:00

Yes, post-molding services such as trimming, drilling, insert molding, assembly, and surface finishing are available to deliver ready-to-use parts.

What Is The Cost Of Injection Molding?2025-10-17T10:34:32+08:00

Costs depend on mold complexity, material selection, part size, quantity, and finishing requirements. We provide detailed quotes after reviewing your design and specifications.

What Are Common Design Considerations For Injection Molding?2025-10-17T10:33:50+08:00

Key considerations include wall thickness, draft angles, ribbing, material shrinkage, and undercuts. Our engineers review designs for manufacturability (DFM) and provide optimization suggestions.

Can I Get Custom Colors And Surface Finishes?2025-10-17T10:33:29+08:00

Yes, pigments can be added to achieve desired colors, and various surface finishes, including matte, glossy, or textured, can be applied to meet functional and aesthetic requirements.

How Is Quality Ensured In Injection Molding?2025-10-17T10:32:57+08:00

Quality is maintained through mold design optimization, precise material control, in-process inspections, and final quality checks to ensure dimensions, appearance, and functionality meet specifications.

Can I Produce Small Or Prototype Runs?2025-10-17T10:32:38+08:00

Yes, injection molding can accommodate low-volume production or prototypes. Our team provides rapid tooling and production options to meet small batch requirements.

What Is The Typical Lead Time For Injection Molded Parts?2025-10-17T10:31:42+08:00

After mold approval, production lead time usually ranges from 1–4 weeks, depending on quantity, material, and required finishing processes.

How Long Does It Take To Make A Mold?2025-10-17T10:31:16+08:00

Mold fabrication typically takes 2–6 weeks, depending on complexity, material, and tolerances. Simple molds are faster, while complex molds for precision parts may take longer.

What Materials Can Be Used For Injection Molding?2025-10-17T10:30:56+08:00

Common materials include ABS, polypropylene (PP), polyethylene (PE), polycarbonate (PC), liquid silicone rubber (LSR), and various engineering plastics. Material choice depends on part requirements, durability, appearance, and functionality.

What Is Injection Molding?2025-10-17T10:30:34+08:00

Injection molding is a manufacturing process where molten material is injected under high pressure into a mold cavity to form custom parts. It is widely used for producing plastic, silicone, and metal components with high precision and repeatability.

Put your partsinto production today

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