• Experience

    Established in 1990, it is a professional enterprise engaged in the manufacturing of industrial application tools

  • Category

    We provide injection molding, extrusion and rubber with quality products such as screws, barrels and mould.

  • Quality

    Our facility is certified by ISO9001 and has the most advanced manufacturing facilities and modern processing equipment

  • Service

    Our company has a professional after-sale service team, after-sales department in a timely manner to track the usage of the customer

Product Category

As a China-based manufacturer since 1990, HAPPY PLASTICS supplies screws, barrels, and gearboxes for injection, extrusion, and rubber machinery, ready for your wholesale inquiry.
  • Injection Molding Machine Barrel
    Injection Molding Machine Barrel
    Founded in 1990, HAPPY PLASTICS is a professional China manufacturer of injection molding machine barrel. We develop and produce high-precision barrels for injection, extrusion, and rubber machinery, covering four core product lines: barrel FOR HAITIAN INJECTION MACHINE, barrel FOR Chen Hsong Injection Machine, barrel FOR LKIMM Injection Machine, and complete Inject Mold Screw Barrel systems. We supply standard wholesale units and drawing-based customized setups, solving complex plasticizing issues for global plastic manufacturers.
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  • Injection Molding Machine Screw
    Injection Molding Machine Screw
    Global factories partner with HAPPY PLASTICS to buy injection molding machine screw assemblies to fix dosing delay and pressure drops. Established in 1990, our manufacturing facility delivers precision-engineered screw designs that optimize material melting stability, cutting scrap rates by 15% and directly enhancing dimensional repeatability across high-speed molding lines.
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  • Single Screw For Extrusion Machine
    Single Screw For Extrusion Machine
    As a specialized, China-based single screw for extrusion machine factory, HAPPY PLASTICS integrates advanced metallurgy with precise engineering to stabilize melt linear flow. Since 1990, our manufacturing facility has developed custom-tailored flight profiles designed to steady head pressures, eliminate volumetric output surging, and lower energy consumption across continuous pipe, sheet, and profile production lines.
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  • Twin Screw and Barrel For Extrusion Machine
    Twin Screw and Barrel For Extrusion Machine
    Operating as a professional, China-based Twin Screw and Barrel For Extrusion Machine factory, HAPPY PLASTICS manufactures high-torque, intermeshing co-rotating and counter-rotating systems to optimize complex compounding operations. Our production facility has engineered custom-tailored planetary, parallel, and conical flight segments designed to increase distributive mixing efficiency, eliminate material degradation, and maximize volumetric throughput for global high-output processing plants.
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  • Screw and Barrel For Rubber Machine
    Screw and Barrel For Rubber Machine
    As a specialized Screw and Barrel For Rubber Machine factory, HAPPY PLASTICS delivers high-torque, temperature-controlled plasticizing systems engineered for highly elastic elastomers. Since 1990, our manufacturing facility has developed custom-tailored flight profiles designed to handle high Mooney viscosity compounds, eliminate premature vulcanization, and maintain stable linear output across continuous tire, profile, and silicone cable extrusion lines.
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  • Special Screws And Barrels
    Special Screws And Barrels
    When standard plasticizing units fail under extreme chemical corrosion or high mechanical shearing, global processors partner with HAPPY PLASTICS to buy Special Screws And Barrels systems custom-built in China. Since 1990, our advanced engineering team has developed material-specific flight geometries and surface treatments designed to process complex, unstable, and highly filled engineering resins—protecting your production line from premature clearance wear and stabilizing dimensional shot repeatability.
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About Us

HAPPY PLASTICS - Professional Factory Offering Customized Screws & Barrels

ZHOUSHAN HAPPY PLASTICS MACHINERY CO., LTD. is a professional manufacturer of industrial application tools established in 1990.
We provide injection molding, extrusion and rubber with quality products such as screws, barrels, and mould. We promise to continuously devote our time and professionalism into the development of our products, thus creating greater value for our clients.
Our company has a professional after-sales service team and an after-sales department in a timely manner to track the usage of the customer and to provide customers with after-sales problem processing, technical advice, and maintenance tracking effects. As the production and processing and quality improve, information for design. With professional design, processing, testing, and after-sales, Zhoushan Happy Plastic won the general customers' support and recognition.
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HAPPY PLASTICS - Professional Factory Since 1990

What We Do?

Engineering Precision for High-Performance Plastics

We provide comprehensive industrial application tools for the entire plastics processing spectrum. Our core manufacturing capabilities focus on:
Injection Molding Solutions

High-wear resistant screws and barrels designed for demanding injection applications.

Extrusion Systems

Specialized barrier screws and grooved feed extruder barrels for film, pipe, and profile production.

Rubber & MIM Machinery

Precision components for powder metallurgy (MIM) and rubber processing.

OEM Customization

We produce strictly according to technical drawings, material grades, or physical samples.

Our Services

Beyond Manufacturing – Full-Cycle Technical Service

01

Smart Material Selection

We analyze your plastic raw materials and molding process to recommend the most cost-effective screw and barrel structures.

02

Troubleshooting & Optimization

Our senior engineers provide "Product Status Analysis" to solve defects like black spots, poor plasticization, or instability.

03

On-Site & Remote Debugging

We assist with machine debugging and process improvement to help you achieve perfect product quality.

04

Warranty Commitment

In case of any quality-related issues, we offer a 90-day exchange guarantee.

FAQ

Frequently Asked Questions

1. Are you a trading company or a genuine screw and barrel manufacturer in China?
We are a direct manufacturer and supplier. You are welcome to visit our workshop in Zhoushan to inspect our production facilities and quality control processes firsthand.
2. What trade terms and payment methods do you support?
We support EX-WORKS, FOB, CIF, DDP, and DDU. Our standard payment terms are 50% deposit and 50% balance paid before shipment to secure your order.
3. Do you support OEM (Original Equipment Manufacturing) orders?
Yes, absolutely. We are an experienced OEM factory. We can produce high-precision screws and barrels based on your technical drawings, material specifications, or physical samples.
4. How long does it take to produce a custom screw and barrel set?
Generally, our production lead time is approximately 40 days for standard custom orders, depending on the complexity and material requirements.
5. What is your after-sales warranty?
We offer a robust after-sales service. In case of any confirmed quality problems, we provide a 90-day exchange service to ensure your production remains uninterrupted.
6. How do I choose the right screw material for my application?
Our technical support team will guide you. We select the screw structure and material (e.g., Nitrided, Bimetallic, or HIP-clad) based on your specific plastic raw materials and the molding process you use.
7. Do you ship worldwide?
Yes. As a leading supplier in China, we have extensive experience shipping to Europe, the Americas, Southeast Asia, and the Middle East with reliable logistics partners.
8. Can you help debug our machine if we have production issues?
Absolutely. Our service team provides technical advice and remote troubleshooting to help you solve bad product issues and improve your molding process efficiency.

Send Inquiry

Get a factory-direct price quote from HAPPY PLASTICS today - share your technical drawings or samples, and our professional team will respond within 24 hours with customized solutions.

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News

Stay informed with Happy Plastics' latest technical insights, screw selection guides, and molding process tips - helping you solve product defects efficiently.

Installation of Extruder Twin-Screw Barrel

Installation of Extruder Twin-Screw Barrel

The installation of the twin screw extruder barrel is a precision operation that requires ensuring the alignment accuracy and correct assembly sequence of the barrel with the gearbox, screws, and other components.

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Working Principle of Injection Molding Machine Barrel

Working Principle of Injection Molding Machine Barrel

The material barrel of an injection molding machine is one of the core components in the plastic plasticization and injection molding process. Its working principle mainly relies on the synergistic effect of the screw and the material barrel, which achieves the transformation of plastic from solid particles to a uniform molten state through heating and shearing.

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How Does an Injection Molding Machine Screw Improve Plastic Processing Performance?

How Does an Injection Molding Machine Screw Improve Plastic Processing Performance?

The injection molding machine screw is one of the most critical components in modern plastic manufacturing. It directly affects plasticizing efficiency, melt quality, injection stability, energy consumption, and final product performance. A poorly designed or worn screw can lead to inconsistent melting, uneven color mixing, excessive material waste, and lower production efficiency.

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