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Plastic Injection Molding
Plastic Injection Molding

Plastic Injection Molding

Insert molding
Insert molding

Insert molding

Overmolding
Overmolding

Overmolding

Liquid silicone rubber molding

Liquid silicone rubber molding

Our custom injection molding services
Our custom injection molding services

Our custom injection molding services

Plastic Injection Molding Service

Injection molding is a manufacturing process that consists of filling a metal mold cavity with liquid plastic resin, which then cools and forms a plastic part.

Insert molding

A manufacturing process in which a part is molded around a pre-installed insert in the tooling.

Overmolding

A manufacturing process in which one plastic material is molded over another to create a single component.

Liquid silicone rubber molding

A thermoset process that involves mixing a two-part solution together to produce flexible and durable parts.

Our custom injection molding services

Plastic Injection Molding Service

Injection molding is a manufacturing process that consists of filling a metal mold cavity with liquid plastic resin, which then cools and forms a plastic part.

Insert molding

A manufacturing process in which a part is molded around a pre-installed insert in the tooling.

Overmolding

A manufacturing process in which one plastic material is molded over another to create a single component.

Liquid silicone rubber molding

A thermoset process that involves mixing a two-part solution together to produce flexible and durable parts.

Satisfied Customers

We are still keeping good and lasting relationships with these customers

MERCKphilipsaudimagnaWhirlpool

Applications and Advantages

of Injection Molding

Rapid PrototypingProduction PartsRange of Industries and Certifications

Rapid Prototyping

Low-cost tooling allows for rapid injection molding to be produced in as fast as 10 business days at affordable prices.

Production Parts

Injection molding can be the ideal process for low-volume production molding of 250 units to mass production molding of over 1,000,00 units . Plastic injection parts will perform better than the same part machined or 3D printed using the same material. Careful selection of the resins allows for a wide range of properties and solvent compatibility. Molds are CNC machined to high precision, and high tolerance,s and can produce thousands of identical parts with very small and intricate details.

Range of Industries and Certifications

We offer ISO 9001, AS9100, ISO 13485, UL, ITAR, and lSO 7 and 8 Medical Clean Room molding.

Why Use HLH Injection

Mold Services?

Endless Options

Choose from millions of possible combinations of materials, finishes, tolerances, markings, and certifications for your order.

Easy to Use

Get your parts delivered right to your door without the hassle of sourcing, project management, logistics, or shipping.

Vetted Network

We are lS0 9001:2015,ISO13485, and AS9100D certified.Only the top shops that apply to become Suppliers make it through our qualification process.

Injection molding materials

Injection molding uses a huge range of plastics, making it ideal for many applications across nearly every industry. we can source thousands of materials on request.

Acrylonitrile Butadiene Styren (ABS)

Acrylonitrile Butadiene Styren (ABS)

Polymethyl Methacrylate (PMMA)

Polycarbonate (PC)

Polycarbonate (PC)

Polyethylene (PE)

Polypropylene (PP)

Polypropylene (PP)

Polyamide 6 (PA6)

Polyether Ether Ketone (PEEK)

Polyether Ether Ketone (PEEK)

Polyoxymethylene (POM)

Custom Injection Moldings Design Guidelines

Feature

Tip

Undercuts

Minimize undercuts to simplify tooling and reduce costs. Use pass-thru coring to avoid complex ejection mechanisms and streamline manufacturing processes.

Wall Thickness

Maintain uniform wall thickness to prevent sinks and voids. Opt for thinner walls to decrease cycle time and lower production costs, ensuring consistent and efficient molding.

Draft Angles

Design parts with a draft angle of at least 0.5° for smooth ejection, and up to 5° for surfaces with medium textures, improving mold release and part quality.

Ribs and Gussets

Keep ribs at 40-60% of the outer wall thickness while maintaining proper draft angles. This ensures strength without compromising the integrity of the mold or part design.

Bosses

Design bosses with a depth of 30% of wall thickness and include a 30% edge groove for optimal strength. Connect bosses to side walls or ribs to enhance structural durability.

Tooling - prototyping vs production

Prototyping

Ideal for rapid prototyping and low-volume production

1:Tool shot life – 1k to 100k units

2:Fast turnaround and cost-efficient construction

3:Aluminum or steel

Prototyping

Production

Longer-lasting tooling for larger volumes

1:Tool shot life – 100k to 1M units

2:Automated production for cost-efficiency at higher volumes

3:Hardened steel for longer life and a scalable unit price

Low Production

RELATED SOURCES

Insert molding
Insert molding
Overmolding
Overmolding
Liquid silicone rubber molding
Liquid silicone rubber molding

Testimonials

Amazing experience. All the expectations fulfilled. Exceptional quality and surface finish. Lead time faster than initially stated.

Amazing experience. All the expectations fulfilled. Exceptional quality and surface finish. Lead time faster than initially stated.

-------------STEVEN JAWORSKI

I think HLH is a very customer friendly service, easy to understand the costs and build limitations. The best part for me is the ease of which I can turn ideas around into something I can sell, which I can use to fund my next project.

I think HLH is a very customer friendly service, easy to understand the costs and build limitations. The best part for me is the ease of which I can turn ideas around into something I can sell, which I can use to fund my next project.

------------YONATAN ASSOULINE

HLH has always given us exactly what we needed. We’ve received parts with holes in the right places, with the right finish, and on time. Their user-friendly website means faster turnaround.

HLH has always given us exactly what we needed. We’ve received parts with holes in the right places, with the right finish, and on time. Their user-friendly website means faster turnaround.

----------------Jackson Siu