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Injection Molded Parts

Your Professional Injection Molded Parts Supplier

HENAN GNEE RAIL CO.,LTD. is a leading Chinese manufacturer and exporter specializing in rail fastening systems and rail joints. Our core product portfolio includes steel rails, rail fasteners, bolts, nuts and screws, base plates, pads and insulating components, as well as fishplates and anchors.

High-Quality Products

Equipped with advanced manufacturing equipment and a rigorous quality control system, our facility ensures consistent strength, durability, and performance across all production batches.

Customized Solutions

We accept OEM and ODM orders and provide comprehensive, one-stop solutions tailored to the needs of international railway infrastructure projects.

Quality Certifications

GNEE RAIL holds multiple internationally recognized certifications, including CNAS (China National Accreditation Service for Conformity Assessment), ISO 9001, CE, and SGS, demonstrating our compliance with global quality and safety standards.

Global Market Presence

GNEE RAIL maintains an established global supply footprint, delivering engineered track components and fastening assemblies to key transportation networks, industrial zones, and maritime ports across multiple continents.

Specification

Stiffness	KN	90-130
Hardness Shore A	℃	72-80 degree
Electronic Resistance	Ω	≥ 106
Tensile Strength before Aging	Mpa	≥12.5
Elongation before Aging	%	≥250

Types of Injection Molded Parts

The injection molded parts produced by our company mainly include the following types:

Rail Pad

Rail pads are elastic polyurethane mats which are interposed between steel rails and railway sleepers to protect the sleeper top from wearing and impacting.

Rail Plastic Dowel

Railway Plastic Screw Dowel for Sleeper, Plastic HDPE socket for Concrete Sleeper, also known as plastic sleeve, plastic insert, concrete dowel, concrete insert, Nylon Dowel, PA66 Dowel, being widely used in rail fastening.

Rail Insulator

The rail insulator is one of the key components of the high-speed railway fastening system. As a part of the connecting piece in the track fastener, it is responsible for adjusting the gauge and the current connection between the insulated rail and the ground.

Railway Fasteners Injection Molded Parts

Advantages of Injection Molded Parts

Low Scrap Rates

Compared to traditional subtractive processes like CNC machining a sheet or billet of plastic, injection molding produces much lower scrap rates. While 3D printing has still lower scrap rates, it’s more suited to low quantity part orders.

Recyclable

There’s a benefit to thermoplastic waste that you don’t have with metal scrap, as well. It can be remelted, reformed, and recycled to complete an in-house recycling loop. A CNC machining shop generally isn’t going to melt down their own metal and create new billets.

Reproducible Quality

While CNC machining produces amazing quality, there is more variability in CNC machining or 3D printing to injection molding. When it comes to surface quality, injection molding beats out 3D printing.

Design Flexibility

With custom injection molding you can have an incredible variety of materials and design features. A part can have a rubberized and textured side with a rigid backing. You can also have different colors for different options—for cars, that means variation on interiors and textures.

Medical Devices

Injection molding is used to create a vast array of medical equipment, from sterile syringes and housings for delicate medical instruments to prosthetic limbs.

Aerospace

Injection molding manufactures lightweight and high-strength aircraft components that meet strict performance and safety standards.

Construction

Injection molded parts are increasingly used in the construction industry, with applications ranging from electrical conduit components and plumbing fixtures to window and door components.

Packaging

Injection molding is a popular choice for creating packaging solutions due to its ability to produce complex shapes, high-quality finishes, and durable containers.

Applications of Injection Molded Parts

Automotive
From lightweight dashboards and instrument panels to intricate engine components that reduce noise and vibration, injection molded parts are vital for creating functional and fuel-efficient vehicles.

Consumer Electronics
The bodies of your phone, laptop, and other gadgets are likely made through injection molding, allowing for sleek designs, precise functionality, and tight tolerances.

Agricultural Components
Injection molding transforms agriculture by creating lightweight, durable, and weather-resistant components for farm equipment and irrigation systems.

Materials for Injection Molded Parts

Polypropylene (PP)

Polypropylene (PP) is one of the most popular materials for injection molding because of its moldability. It is versatile, offers a wide array of uses, and has various unique properties that make it an attractive option.

Polycarbonate (PC)

Polycarbonate (PC) is one of the strongest, most durable materials, which makes it ideal for face shields, visors, or safety glasses. It is a naturally transparent amorphous thermoplastic, which means it remains transparent even if color is added, similar to glass.

Polylactic Acid (PLA)

Polylactic Acid (PLA) is a bio-degradable plastic that is manufactured out of plant-based materials, like corn starch or sugar cane. That’s why it is known as “the green plastic” or “bioplastic”.

Acrylonitrile Butadiene Styrene (ABS)

Acrylonitrile Butadiene Styrene (ABS) is an extremely popular middle-of-the-road injection molding material due to its balanced combination of mechanical toughness, wide temperature range, good dimensional stability, chemical resistance, electrical insulating properties, and ease of fabrication.

Polyethylene (PE)

Polyethylene (PE) injection molding material is the most popular and commonly used plastic in the world, used in shopping bags, toys, garbage cans, and shampoo bottles. It is a lightweight thermoplastic material that has high chemical resistance, elasticity, and electrical insulating properties.

Polyamide (PA)

Polyamide (PA), also known as nylon, is a semi-crystalline polymer with a good range of properties. It is tough and has a high melting temperature, good wear, and chemical resistance, so it is a good option for strong mechanical parts, such as bushings, gears, and bearings.

Molding Process Steps of Injection Molded Parts

01/

Clamping
The first step of the injection molding process is clamping. Injection molds are typically made in two, clamshell-style pieces. In the clamping phase, the two metal plates of the mold are pushed up against each other in a machine press..

02/

Injection
When the two plates of the mold are clamped together, injection can begin. The plastic, which is typically in the form of granules or pellets, is first melted down into a complete liquid. Then, that liquid is injected into the mold. Manufacturers should take care to ensure the temperature remains constant throughout this step of the process

03/

Dwelling
In the dwelling phase, the melted plastic fills the entirety of the mold. Pressure is applied directly to the mold to ensure the liquid fills every cavity and the product comes out identical to the mold.

04/

Cooling
The cooling stage is the most straightforward; the mold should be left alone so that the hot plastic inside can cool and solidify into a usable product that can be safely removed from the mold.

05/

Mold Opening
Once the part has cooled, a clamping motor will slowly open the two parts of the mold to make for a safe and simple removal of the final product.

06/

Ejection
With the mold open, an ejector bar will slowly push the solidified product out of the open mold cavity. The fabricator should then use cutters to eliminate any waste material and perfect the final product for customer use. Waste material can often be recycled and reinjected for the next part, decreasing your material costs.

Packaging and Shipping

Packaging	Packed in durable wooden boxes or reinforced cartons. Custom packaging solutions are available for specialized requirements.
Shipping	Shipping by sea, by air, by express are acceptable. According to your requirements.

Our Factory

HENAN GNEE RAIL CO.,LTD. is one of China's leading exporters of railway equipment, with decades of experience in delivering high-quality rail solutions worldwide.

productcate-743-588

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Our Certificates

GNEE RAIL Registration Certificate

TSI

FAQ

Q: What are injection molded parts?

A: Injection moulding is a manufacturing process for producing parts by injecting molten material into a mould, or mold.

Q: How to tell if a part is injection molded?

A: To tell if a plastic item is injection-molded, look for small imperfections like a gate vestige (a small bump or mark where plastic was injected) and a parting line (a seam where the two halves of the mold met). You may also see sink marks, which are small depressions on a surface, or knit lines, where molten plastic flows and meets. The product's high consistency and ability to have complex features can also indicate injection molding.

Q: How long does it take to injection mold something?

A: The timeline for fabricating an injection mold can vary widely, primarily depending on the mold's complexity and design. Typically, a simple mold might take anywhere from 2 to 4 weeks to complete, while more complex molds could require 6 to 8 weeks or more.

Q: Can stainless steel be injection molded?

A: Injection mold tooling demands materials with exceptional hardness and strength to withstand the stresses and pressures of the molding process. 420 stainless steel, with its ability to achieve high levels of hardness and strength through heat treatment, is ideally suited for this purpose.

Q: Can you injection mold large parts?

A: Injection molding can be used to produce large plastic products with thinner walls. These products tend to be lighter than those produced by structural foam molding, usually weighing less than 20 pounds. Structural foam molding also allows for the production of very large plastic products with thicker walls.

As one of the leading injection molded parts manufacturers and suppliers in China, we warmly welcome you to buy high-grade injection molded parts for sale here from our factory. All customized products are with high quality and competitive price.