Injection Molding

Why Choose Us?

Engineering & Quality Control
Our robust engineering department, advanced quality management systems, team of highly trained professionals, and more than 13 years of machining experience ensure your job will get done right. Our quality-minded professionals are trained in all aspects of quality and written procedures, in order to assure that all our customer's specifications and requirements are met every step of the way.

Wide Product Range
We provide rapid prototyping and low volume production orders to customers in a variety of industries: Aerospace, automotive, defense, industrial machinery, agricultural machinery, construction machinery, transportation equipment, medical equipment accessories, and more.

Reliable On-Time Delivery
We use sophisticated job scheduling software and job tracking systems to monitor the progress of every job in production on a daily basis. These key factors have allowed us to provide our customers with consistently reliable on-time delivery.

Superior Customer Communications
We keep our customers well informed throughout every stage of the production process, from initial quoting through final delivery. Quotes are submitted in a timely manner, orders are promptly acknowledged, and manufacturing processes are monitored on a daily basis to ensure on-time delivery.

What is Injection Molding?

Injection molding is a manufacturing process that enables the production of a huge volume of plastic parts. The process involves melting plastic material, such as thermosetting and thermoplastic polymers, and injecting it into a mold cavity. Once the material has been injected into the mold, it is allowed to cool and solidify into a precise shape and size required for the final product.

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Advantages of Injection Molding

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Precision and Consistent Quality
Injection molding excels in achieving high precision and consistent quality in manufactured parts. The process utilizes custom-designed molds that precisely shape the molten plastic material. This level of control ensures that each injection molded part is produced with exceptional accuracy, meeting tight tolerances required in industries such as aerospace and medical. Consistent quality is crucial for applications where reliability and performance are paramount.

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Cost Efficiency and High Volume Production delays
Injection molding offers significant cost advantages, particularly for high-volume production runs. The initial tooling costs may be higher than other processes, but the per-unit cost decreases as the volume increases. By utilizing multi-cavity molds, multiple parts can be produced simultaneously, maximizing production efficiency and reducing costs. The ability to create identical plastic parts at a rapid rate ensures cost-effectiveness in high-volume manufacturing.

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Wide Material Selection and Design Flexibility
Injection molding supports a wide range of plastic materials, including thermoplastics, elastomers, and thermosetting polymers. This versatility allows manufacturers to select the most suitable material for each application based on physical and chemical properties. Additionally, plastic injection moulding enables design flexibility, facilitating the integration of complex features, such as undercuts, inserts, ribs, bosses, and thin walls. This flexibility empowers designers to create innovative and functional products with intricate details.

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Minimal Waste and Environmental Benefits
Injection molding generates minimal waste during the manufacturing process. Any unused or waste plastic can be recycled and reused, reducing environmental impact. This recycling capability aligns with sustainable practices and the growing demand for eco-friendly manufacturing solutions. By minimizing plastic waste and promoting recycling, injection molding contributes to a more environmentally responsible approach to production.

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Faster Production Cycles and High Output
Injection molding enables faster production cycles compared to many other manufacturing processes. The automated nature of the equipment, coupled with the continuous operation, ensures swift and efficient production. The high output rate and efficiency of injection molding equipment allow for the production of a large number of parts within a short timeframe. This is particularly advantageous for meeting tight deadlines and fulfilling high-volume demands.

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Compatibility and Versatility
Injection molding demonstrates compatibility with various materials, expanding its range of applications. The process can replace metal components with plastic, offering cost savings and versatility. Plastic injection molded parts can exhibit virtually identical properties to their metal counterparts, making them suitable for a wide array of industries, including automotive, electronics, and consumer goods. The ability to manufacture complex part designs, aligning with key design elements and achieving tight tolerances, further enhances the versatility of injection molding.

Types of Injection Molding

Conventional injection molding

Molten plastic is injected into a mold cavity under high pressure, and it is suitable for producing a wide range of plastic parts with complex shapes and precise details.

Two-shot or multi-shot injection molding

In this method, two or more materials are converted into the mold to create a part with multiple colors, materials, or components. It eliminates the need for secondary assembly operations and enables the production of more complex parts.

Insert molding

It combines plastic injection molding with the insertion of pre-formed components, such as metal inserts or other plastic parts, into the mold cavity. The molten plastic material encapsulates the inserts during the molding process, creating a strong bond between the insert and the plastic part.

Overmolding

It is similar to insert molding but involves molding a second layer of plastic material over an existing part or substrate. This process is often used to add a soft-touch grip, improve aesthetics, or enhance functionality.

Gas-assisted injection molding

A controlled amount of inert gas, typically nitrogen, is injected into the mold cavity after the initial injection of plastic material. The gas pushes the molten plastic towards the walls of the mold, improving part quality, reducing material shrinkage and warpage.

Co-injection molding

This method is also known as sandwich molding or multi-component molding. It involves injecting two or more different plastic materials simultaneously or sequentially into the mold cavity. It is commonly used to create parts with a combination of rigid and flexible materials or to achieve specific material properties, such as improved strength or reduced cost.

Micro-injection molding

Used to produce extremely small and precise plastic parts with dimensions in the micrometer range. It requires specialized machinery and tooling to handle the high precision and tight tolerances required for micro-scale components.

Liquid silicone rubber molding

Liquid silicone rubber is the material, which is injected into the mold cavity and cured to produce flexible, durable, and heat-resistant parts. It is often used for applications that require excellent sealing properties or biocompatibility, such as medical devices or automotive components.

Application of Injection Molding

Food and Beverage

When it comes to injection molding, the food and beverage industry relies on plastic materials to manufacture product packaging and containers, and different types of injection-molded food containers such as plastic cookie mold. So, components used in food and beverage processing equipment must meet safety guidelines including BPA-free, FDA-certified, non-toxic, and GMA safety regulations.

Auto Parts

Many parts of modern automobiles have turned to plastic injection molding for development, planning, and manufacturing. Auto parts by automotive injection mold technique, plastic injection molding to accomplish through standardization and modularization, the development of molds can be more cost-effective, and automobile parts can also be produced more quickly and consistently.

Medical and Pharmaceutical

Because many medical products must be shatterproof, non-porous, and perfectly shaped, medical plastic injection molding is critical for medical and pharmaceutical production. As a high-volume producer, the medical industry can benefit from the reduced production time and affordable production materials of injection molding, while still obtaining high-quality medical-grade products. Medical and pharmaceutical parts manufactured using injection molding range from medicine bottles to X-ray assemblies.

Household Items

With a simple trip to your kitchen, you have a good chance of finding household injection moldings or parts. From Tupperware to building materials used in construction, there's no denying the industry wouldn't be what it is today without injection molding. Through the production method of plastic household mold molding, household products can be made more affordable and more diverse.

Agriculture

The choice of reinforced plastics is favored due to new plastic material properties such as UV resistance, impact resistance, moisture resistance, etc. The ability to produce durable products that can stand up to the elements of the farm makes plastic injection molding clearly suitable for agriculture, from feeding troughs to specialized harvesting components.

Electronic Products

While many people think of electronic components as metal mechanical parts that run primarily on electricity, improving system longevity with a corrosion-resistant plastic enclosure improves overall performance. As you might have guessed, manufacturing the case via a plastic electronic injection molding process is preferred. The computer mouse you're probably using right now, as well as the TV in your living room, probably has some components that are injection molded from plastic.

How Does Injection Molding Work?

Mold Creation
Although this is more of a preliminary step, the first part of injection molding involves preparing the metal tooling that will be used as the mold. Molds are generally designed on a computer using Computer Aided Design (CAD) software, then fabricated from metal using CNC machines. Another preliminary step involves readying the raw injection molding material, which is usually a thermoplastic in pellet form. These pellets may need to be mixed with colored dyes before molding begins.

Injection

On the injection unit of the injection molding machine, raw plastic pellets are contained in a hopper — a tapered container that can dispense pellets into the machine as required. When the mold is ready, these pellets are dispensed from the hopper into an oblong section underneath called a barrel, where they are heated into a molten state. The barrel contains a ram or reciprocating screw, which forces the material toward the mold while simultaneously heating it up. The molten plastic exits the heated barrel through a nozzle and into the mold cavity via a sprue — a long channel built into the mold that allows material to enter.

Clamping

When the mold has been fabricated, it must be fitted securely into the clamping unit of the injection molding machine. The unit squeezes the core plate and cavity plate together, ensuring that no molten plastic can escape between the two sections.

Solidification

When the entire 'shot' of molten plastic has been injected into the mold cavity, it begins to cool and harden. This is because the metal mold is much cooler than the heated barrel where the plastic pellets are melted down. As the plastic part hardens, it also exhibits some degree of shrinkage — a factor that must be accounted for during part design.

Ejection

When the plastic part has fully cooled and solidified, the mold can be opened up. During this stage, the core plate is pulled away from the cavity plate, before ejector pins are pushed into the plastic component to disengage it from the core.

Post-processing and assembly

When the part has been removed from the mold, it may need to be painted or subjected to surface finishing procedures. The part may also be joined to other (molded or non-molded) parts to form a complete product.

How to Save the Cost of Injection Molding for Yourself?

Design for Manufacturability Analysis
Finding an experienced partner or mold maker can save you a lot of time and money in the long run. Identifying issues such as impossible geometries, insufficient draft angles, and moldable features at an early stage will eliminate financial and cosmetic expenses along the way.

Consider the Injection Part Size

The amount of material should be reduced as much as possible, cause unnecessarily large parts or features add not only a monetary cost but also a time cost.

Intelligent Mold Design

You can save money by partnering with a molder who designs molds intelligently. How your part is positioned in the mold can have a major impact on cost. Correct part positioning optimizes how molds are filled and reduces scrap.

Modify Your Mold

Reduce costs by modifying molds rather than buying a brand-new mold for every modification. With design tool inserts, you can shape various versions and functions.

When to Choose Injection Molding Over Additive Manufacturing?

High Volume Production

Injection molding is highly efficient for high-volume production runs. The process’s ability to produce a large number of parts in a short time, especially with the use of multi-cavity molds, makes it more cost-effective for large-scale manufacturing. In contrast, additive manufacturing, although versatile, can be time-consuming and less efficient for producing large quantities of parts.

Precision and Accuracy

When precision and accuracy are crucial, injection molding offers distinct advantages. The process enables the production of parts with tight tolerances and intricate details consistently. This precision is especially important in industries like aerospace, automotive, and medical, where component reliability and performance are paramount. Additive manufacturing, while improving in accuracy, may not match the level of precision achieved through injection molding.

Material Selection and Performance

Injection molding provides a wider range of material options compared to additive manufacturing. Manufacturers can choose from a variety of plastic materials with specific physical and chemical properties tailored to their application requirements. This versatility allows for the production of parts with superior mechanical, thermal, or chemical resistance properties. Additive manufacturing, on the other hand, has limitations in material selection, with a narrower range of materials available.

Cost-Effectiveness

For high-volume production, injection molding offers cost advantages over additive manufacturing. While the initial tooling costs for injection molding can be higher, the per-unit cost decreases significantly as the production volume increases. The speed and efficiency of injection molding contribute to its cost-effectiveness for large-scale manufacturing. Additive manufacturing, while offering flexibility in design and prototyping, can be costlier for producing large quantities of parts.

The Injection Molding Process Steps

Custom Plastic Injection Molding Service

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..
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
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.
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.
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.
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.

What Is the Difference Between Injection Molding and Machining?

Injection molding and machining are two distinct methods of shaping materials. Injection molding involves heating the materials until they liquefy, and then injecting them into a pre-designed mold. The material cools and solidifies, taking on the mold's shape. On the other hand, machining begins with a solid material block that is gradually shaped using sophisticated machinery. This subtractive process carves away the excess material until the desired object is formed. While injection molding is ideal for mass production due to its repeatability, machining excels in creating complex, precision parts in smaller quantities.

Troubleshooting Tips For Injection Molding

Inspect the Complete Mechanism and Operation

Before focusing on injection molding defects and solutions, like sink marks, it's important to check for any additional injection molding flaws by looking at the item from every angle. The presence of additional problems, when taken into account as evidence of a process issue, can help in eliminating certain root causes and narrow the culprit faster.

Review the Documentation

When thorough documentation of injection molding troubleshooting is kept throughout a process, it can help answer many potential questions about a problem in advance. In a perfect world, paperwork would head off problems before they even arise. In order to offer as much information as possible for the future, it is important to keep detailed records of any process changes done to address a molding issue. The opposite is true when initiating a new procedure; always go to the documentation for guidance.

Don't Forget to Account for the Machine's Outputs

When debugging a machine, it's crucial to not just record the inputs but also the outputs. As a result, anyone else consulting the injection mold troubleshooting documentation will gain a clearer understanding of how the standard process inputs actually performed (in comparison to the expected results) and how they affected the quality of the final products. Second-stage packing time, screw recovery time, cooling time, and completed component weight are all important outputs to record in the injection molding troubleshooting guide.

Consider Process Relationships

When trying to figure out what's wrong, one might try isolating individual processes and the injection molding tool design. However, when doing so, it's important to keep in mind the hidden or interacting impacts that changing (or removing) one process might have on another. When diagnosing or implementing a solution, it's helpful to keep in mind the old adage that “nothing happens in a vacuum,” meaning that if an individual changes one part of the process, it will probably have a domino effect on 10 (or more) other parts. As a result, tweaking and injection molding troubleshooting documentation take on greater significance here.

Importance of Design for Injection Molding

Determines Complexities of Manufacturing
After analyzing the design, product designers and engineers can predict the various complications likely to occur during manufacturing. The design provides a detailed illustration to reduce uncertainties before the production stage. Moreover, a prior understanding of the complexities clarifies the mold’s shape and structure. This will help design and manufacture the right mold tooling for the desired products.

Ensures Manufacturing Feasibility
It is relatively uncertain whether a designed part is suitable for manufacturing at the initial stage of every plastic part design and production process. The design for injection molding makes it possible to determine the feasibility of the manufacturing method right from the beginning. As such, manufacturers can ascertain if they experience manufacturing challenges with parts stuck in molds. More importantly, it saves time and costs, ensuring the product is affordable and produced within a shorter cycle time.

Prevents Parts Failure
An inadequate design process may negatively affect the functionality and aesthetic appeal of injection molded parts. Such parts may be unable to perform their intended functions due to injection molding defects or other mechanical faults. The injection molding design guide will help choose the suitable molding parameters and avoid critical issues that may lead to parts failure.

How to Control Injection Molding Pressure?

Material Properties

The size and change of injection pressure are affected by the properties of raw materials. Generally speaking, raw materials of the same brand have different injection pressure requirements.

Mold Structure

The structure and gap design of the mold also have a great impact on the control of injection pressure. Reasonable mold design can effectively control the size and change of injection pressure.

Adjustment of Injection Molding Equipment

The adjustment of injection molding machine equipment is also very important for the control of injection pressure. When performing injection molding, reasonable the initial injection pressure of molding machine equipment can greatly improve the stability and controllability of injection pressure.

How to Choose Injection Molding or Vacuum Casting?

Quantity

For large-volume orders, injection molding is generally chosen. Although the mold cost of injection molding is high, the unit cost is very low. This means that when you need thousands or tens of thousands of parts, you can easily make up for the initial cost of the mold by saving each unit cost. On the other hand, not everyone needs mass production. When a smaller number of parts are needed (a few prototypes or a few hundred), vacuum casting may be a better choice because the mold cost is much lower.

Detail

Since injection molds are usually made of high-quality metal, injection molding can produce finer parts compared to vacuum casting. Therefore, for highly complex parts, injection molding may be a better choice. For simpler parts, especially parts that only need to be manufactured in a small quantity, vacuum casting can be used, and this is not just a cheap option, but vacuum casting can also provide a smooth surface finish.

Speed and Quick Turn
If the design needs to be modified at any stage of the manufacturing process, it is much easier and cheaper to modify the silicone mold than to rework or refurbish the injection molding steel mold. So, this also means that in the early stages of development, vacuum casting is usually a better choice. In fact, customers usually use vacuum casting to manufacture early prototypes before using injection molding to manufacture end-use parts. More importantly, compared to creating a mold for injection molding, creating a silicone mold for vacuum casting is a faster process, which means prototype process would be in a shorten lead time.

What Are the Major Factors Affecting an Injection Moulding Process?

01.

Material being used

The selection of the right material for injection molding is essential to ensure reliable production. Whether it be plastic with low melt temperatures, viscosity, or shrinkage rate; each chosen element must have properties that can withstand rigorous applications and deliver optimal strength and durability while in its injection molded form.

02.

Design of the mold

Precise design of the injection mold is essential in crafting reliable parts. It determines where molten material will flow and assigns it a specific size, allowing for highly accurate part production with no variation between iterations.

03.

Injection molding machine

To ensure high-quality, accurate parts are produced through injection molding, the machine responsible for injecting must be up to par. It needs to generate correct pressure and temperature levels as well as have sufficient capacity in terms of size and complexity; able to accommodate both the scope of material used and intricacy needed from an injection mold.

04.

Operating conditions

The operating conditions of the injection molding machine can also have a significant impact on the injection molding process. The mold temperatures and plastic pressure of the molten material, the speed and force of the injection, and the cooling rate of the mold all play a role in the quality and accuracy of the final parts.

5 Factors Affecting Plastic Injection Molding Cost

Part Design
The more complex your part is, the more complex its mold must be. Complex, custom plastic injection molding parts are usually more expensive because they require more tooling than simple parts. Machining complex parts may require secondary EDM procedures for undercut features, in turn requiring more production time. Plus, larger parts require more material, which increases costs.

Part Material Used
The type of resin used also greatly affects plastic injection molding costs. Along with quantity of parts, additives, compounding, and molding temperatures, resin availability, grade, and color should all be considered when selecting a resin. Resin choice may also affect mold maintenance requirements, leading to higher costs, as is the case with abrasive resins.

Mold Material Used

Various steels are available for mold creation, but the specific type required for a job will depend on the type of materials used for plastic injection molding. Higher-temperature thermoplastics necessitate steel with higher hardness, or molds plated with steel. Consider the mold maintenance required and the need for replacement molds when selecting mold materials.

Volume and Cavities

The more cavities required to form your part, the longer the press time. Longer press times limit the ability to produce parts rapidly, increasing costs. Producing higher volumes of parts requiring numerous cavities will also involve higher production costs.

Mold Manufacturer Location

The location of your mold manufacturer will impact overall plastic injection molding costs based on the shipping and handling costs required to get the mold to the processing location. When using a mold manufacturer in China, for instance, consider the minimum wages of each province. Proximity to seaport will also affect transportation costs.

The Top 5 Most Common Plastic Resins Used in the Injection Molding Process

Polypropylene

This rigid material has insulation properties and provides resistance to chemicals and fatigue; however, it is flammable and vulnerable to UV radiation.

Low-Density Polyethylene (LDPE)

LDPE is a cost-effective, easy to process, flexible, and high strength material that offers translucence and resistance to chemicals and moisture.

Celcon® (Acetal)

Acetal, otherwise known as polyoxymethylene (POM) or polyacetal, is a thermoplastic that offers wear resistance, toughness, creep and chemical solvent resistance, low moisture absorption, heat distortion, and easy colorization.

Acrylonitrile Butadiene Styrene (ABS)

ABS offers high strength, toughness, and resistance to impact and temperature. It is easily molded and gives a high-quality glossy surface finish. This plastic polymer does not have a specific melting point.

High Impact Polystyrene (HIPS)

This cost-efficient material offers excellent machinability, dimensional stability, impact resistance, and aesthetic properties. It is highly customizable and can be glued, printed, bonded, and decorated with ease.

Our Factory

The company was founded in 2010. The company started from a small workshop with 5 CNC machines. After experiencing a difficult startup period, the business grows rapidly. Three years later, we moved to a larger plant and added 10 milling machines and 1 lathes. In 2015, Kevin decided to enter foreign market. With the rapid expansion of international business, the company moved again to a new location with 1500m2.

Ultimate FAQ Guide to Injection Molding

Q: What is the injection molding process?

A: Injection moulding process is producing plastic products by inserting the plastic granules, heating them, cooling them and finally giving the shape and size of the required plastic products. It is the rapid method of producing a large number of plastic products with high precision.

Q: What is injection moulding used for?

A: Injection moulding is used to make a range of widely used products, including common plastic items like bottle tops as well as remote control casings, syringes and more. It is also commonly used for manufacturing larger items such as car body panels.

Q: How does injection moulding work step by step?

A: Material granules from the hopper feed into the heated barrel & rotating screw. Material melted by heat, friction & shear force is forced through a check valve to the front by the rotating screw.

Q: Is injection molding expensive?

A: A small and simple single-cavity plastic injection mold usually costs between $1,000 and $5,000. Very large or complex molds may cost as much as $80,000 or more. On average, a typical mold that produces a relatively simple part small enough to hold in your hand costs around $12,000.

Q: Is injection moulding easy?

A: Plastic injection moulding is a complex manufacturing process commonly used to create plastic components. The ability of injection moulding to produce thousands of complex parts quickly makes it the perfect process for the mass production of plastic components.

Q: Why is injection molding so popular?

A: It minimises molding costs and is a highly repeatable way of producing plastic or elastomeric parts with high precision. Once set up, it can manufacture a large volume of parts per hour, from a wide range of different plastics plus other materials such as liquid silicone rubber.

Q: How long does injection molding last?

A: The life expectancy of plastic injection molds can range between hundreds to over a million cycles and the durability depends on its environment, maintenance, materials, structure, molding conditions, structure design, and other factors.

Q: Why is injection molding so expensive?

A: Making injection molds requires a large amount of materials, equipment, and personnel, which are costly. Molds are usually made of high-grade steel or aluminum, which can be costly depending on their size and complexity. To ensure accuracy and durability, mold tooling must also be of high quality.

Q: How safe is injection moulding?

A: Injection molding can pose a variety of risks, including exposure to toxic fumes, vapors, and gases from plastic resin and additives. Fire and explosion hazards may be present due to flammable materials, electrical sparks, and overheating.

Q: What is a cheaper alternative to injection moulding?

A: Thermoforming is the process of heating a thin plastic sheet until it's pliable. You can stretch, mold, and trim it into any shape you want. Here's the real kicker: it's an economical alternative to injection molding for complex, low-volume products.

Q: What is better than injection molding?

A: While injection molding is better for producing complex parts, thermoforming is better for manufacturing high-quality finished products. Manufacturers can use thermoforming for developing large-scale products and parts. Thermoforming also offers an efficient and cost-effective molding process.

Q: What is the profit margin for injection molding?

A: In the injection molding industry for example, margins of 6-7% are pretty typical. Of course some plastics manufacturers have profits higher than average, some lower. That's true in every industry.

Q: Can you do injection moulding at home?

A: 3D printed injection molds are a time and cost-effective alternative for low-volume production. They are also less expensive than CNC machining. This article will guide you through the whole process of DIY injection molding and give you all of the tools and tips you will need to learn how to mold plastics at home.

Q: Is it hard to learn injection molding?

A: Operating a plastic injection molding machine requires training and knowledge of the machine's controls and processes. It involves setting up the machine, preparing and loading the raw materials, monitoring the production process, and troubleshooting any issues that may arise.

Q: What are the 4 stages of injection moulding?

A: The individual parts of this process are very short. The whole injection moulding process usual lasts from 2 seconds to 2 minutes. There are four stages in the cycle. These stages are the clamping, injection, cooling and ejection stages.

Q: How much pressure is needed for injection molding?

A: Injection pressures must be high enough to fill the cavity, forcing material into the furthest reaches. Injection pressures commonly range between 70 and 112 MPa (10–16 kpsi). Higher pressures tend to minimize average mold shrink.

Q: What is the strongest plastic for injection molding?

A: Polycarbonate (PC): Polycarbonate is a transparent thermoplastic that offers some of the strongest, most shatter-resistant construction available for plastic injection molded products.

Q: Is casting cheaper than injection molding?

A: Part Cost: Urethane cast parts are more expensive than injection molded parts because of the manual labor and low volumes produced by casting. Material: Only a limited set of curable urethanes can be used for casting while an extensive variety of thermoplastics and thermosets can be used with injection molding.

Q: What is the best metal for injection molding?

A: The most popular mold steel for plastic injection molding is P-20 Steel, which has strong wear resistance and is reasonably priced. It is a pre-hardened injection mold steel material, which implies it is prepared for usage in the mold when it leaves the factory hardened to a certain hardness.

Q: Is injection Moulding a fast process?

A: Once you have developed the moulds, the process is extremely fast with cycle times as short as 10 seconds. It is excellent for medium and high-volume production runs for anything from 10,000 parts to well over 100,000 depending on what moulds you use.

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