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Plastic Injection Mold Making 
Plastic Injection Molding Parts Manufacturing 
Plastic Parts Surface Finishes
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What Is Plastic Injection Molding?

Plastic injection molding is a manufacturing process used to create plastic parts by injecting molten plastic material into a mold cavity under high pressure and then cooling and solidifying the plastic part.

Three Features of Plastic Injection Molding

1 2 3

Durable, Reliable and Complex

Fast Production Speed

Flexible Production Process

Injection molding is renowned for its versatility as a conventional manufacturing technique, enabling the creation of intricate, long-lasting, and dependable components.

Once the injection mold is created, the speed of producing parts through injection molding is very fast, making it an ideal method for mass production.

Injection molding has a variety of plastics to choose from and is a flexible process that can produce parts for various industries.

What KYLT do

Plastic Molds Making & Plastic Injection Molding Services

Precision plastic injection molds and Plastic parts manufacturing, especially expert in medical spare parts molds design & making. Plastic material types are not limited. Multiple surface treatment methods can be used: UV coating, Painting, Pad printing, Silk printing, etc.

KYLT Plastic Injection Molding Services

KYLT Plastic Injection Molding Services involve: Plastic Molds making & Plastic Injection Molding Parts Manufacturing, and other plastic parts finishes processes. 
A plastic injection mold is a tool or die used in the plastic injection molding process. It is typically made of steel and is designed to create the desired shape and features of a plastic part. The mold consists of two halves: the cavity side, which forms the exterior of the part, and the core side, which forms the interior. The molten plastic is injected into the mold cavity, where it cools and solidifies, taking the shape of the mold. Once the part is cooled and solidified, the mold is opened, and the molded part is ejected. 
Injection molding parts refer to the plastic components produced through the plastic injection molding process. These parts can be of various shapes, sizes, and complexities, depending on the design of the mold. Injection molding is widely used to manufacture a wide range of parts in industries such as automotive, electronics, medical, and consumer goods. The process offers high precision, repeatability, and efficiency, making it suitable for producing large volumes of plastic parts.
Plastic Injection Molding Services
Plastic Injection Molding Servicess
KYLT helps customers with all stages of injection molding, including reviewing designs, manufacturing molds & parts, and making prototypes. We also provide assistance with low-volume production and scaling up production.

Low-volume Plastic Parts Manufacturing

Scale-up Plastic Parts Manufacturing

Our utilization of aluminum molds allows for cost-effective tooling and expedited manufacturing cycles.
1. adopt aluminum mold 
2. low-volume production 
3. bridge tooling 
4. test runs 
5. functional testing and prototyping
Precision standard components and processes such as standard mold bases and hot runners ensures the high precision and stability of mass-produced products.
1. standard plastic injection mold 
2. scale-up production 
3. precision plastic molded parts 
4. mass and continuous manufacturing 
5. final assembly

Injection molding is a highly efficient process that yields parts capable of serving a wide range of purposes.

The complete mold manufacturing and processing supply chain allows us to start producing your molds on the same day we receive the documents. Flexible machining processes improve mold processing efficiency, deliver your projects faster, and help you save time and money. We assist clients in conducting design and manufacturing reviews to determine whether design adjustments are required to the documents before transferring the project to production. This helps your project achieve the best possible results during the trial phase, reducing the time to market for parts and products. By utilizing our injection molding services, you can achieve production quantities of up to 100,000 units per order. Our lead time for providing first-part samples from the mold build ranges from one week to five weeks. Therefore, we encourage you to get in touch with us today to discuss your production deadlines.

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Plastic Injection Molding Capabilities

By using injection molding, KYLT offers a variety of solutions and advantages to meet your needs. Our basic guidelines for plastic injection molding include important design considerations to help improve the formability of parts, enhance appearance, and shorten overall production time.

Vertical Injection Molding Machine

Horizontal Injection Molding Machine

A vertical injection molding machine is utilized for manufacturing injection molded parts, with the injection unit positioned vertically above the mold.
Horizontal injection molding machine is a type of machine used to fabricate products by injecting molten material into a mold in a horizontal direction.

Plastic Molds Making Service

Plastic Injection Molding Parts Manufacturing Service

KYLT Plastic molds making service is specializes in designing and manufacturing plastic molds for various applications. Plastic injection molds types: Two-plate mold, Three-plate mold, Hot rummer mold, cold runner mold, insert mold, Overmolding, Multi-cavity mold, Family mold, Unscrewing mold etc.
KYLT Plastic injection molding parts manufacturing service with low cost, efficiency and good quality is highly populiar in various industries.

Plastic Injection Molding Parts & Plastic Molds Manufacturing Services Process

Plastic Injection Molding Detail Steps:

Mold design:
The first step is to design a mold for molding. The design of the mold takes into account the shape, size, and other specific requirements of the final product.
Material preparation:
Select suitable plastic raw materials and heat them to a molten state for injection into the mold.
Injection molding:
Molten plastic is injected into a pre designed mold cavity. Usually there are two half molds, one moving and one fixed. Fill the mold cavity with plastic and then cool it down.
Cooling and curing:
Plastic is cooled in a mold and gradually solidified into the desired shape. The cooling time depends on the type of plastic and product size.
Once the plastic is fully cured, the mold is opened and demoulded from the mold.
Once the plastic is fully cured, the mold is opened and demoulded from the mold.
Post processing:
The completed parts may require the removal of excess materials, surface treatment, or even assembly.

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Components of A Plastic Injection Mold

The following are the main components of plastic injection molds, but depending on the complexity of the product and mold design, they may include other components or functions.

Mold Components





Mold base

A sturdy base that holds all the other components of the mold together. It provides support and stability to the mold.


Cavity plate

The cavity plate is the part of the mold that forms the shape of the final plastic product. It contains a cavity or multiple cavities that fill with molten plastic to create the desired shape.


Core plate

The core plate is the counterpart to the cavity plate and creates the internal shape of the plastic product. It also contains a core or multiple cores that help form the desired shape.


Sprue bushing

The sprue bushing is the entry point for the molten plastic into the mold. It connects the injection machine to the mold and allows the molten plastic to flow into the mold through a runner system.


Runner system

The runner system is a network of channels that distribute the molten plastic from the sprue bushing to the cavity. It helps control the flow and distribution of the plastic within the mold.


Ejector pins

Ejector pins are used to push the finished plastic product out of the mold once it has cooled and solidified. They are typically located on the core side of the mold.


Cooling system

The cooling system consists of cooling channels or circuits that circulate coolant, 
such as water, to remove heat from the mold. Proper cooling is crucial to ensure the plastic product solidifies properly and minimize cycle time.


Venting system

The venting system consists of small vents or channels that allow air or gases to escape from the mold during the injection process. This helps prevent air traps, voids, or other defects in the finished product.

Guide pins and bushings

Guide pins and bushings ensure proper alignment and movement of the mold components during the production process. They help maintain precise positioning and assist in opening and closing the mold.

Mold inserts and lifters

Mold inserts are additional components that can be inserted into the mold to create specific features or details in the plastic product. Lifters are used to create undercuts or features that require additional mold movement during the ejection process.

Request a quote today for plastic molded parts from KYLT.

Plastic Injection Mold Types



Mold Types






Two-plate mold

      This is the most basic type of injection mold, consisting of two plates that come together

to form the mold cavity and ejector system.



Three-plate mold


Similar to the two plate mold, but with an additional plate called the runner plate that separates the mold cavity from the runner system. This allows for easier removal of the molded part and reduces cycle time.



Hot runner mold


In this type of mold, the runner system is heated, allowing for direct injection of the 

molten plastic into the mold cavity. This eliminates the need for a separate runner plate

and reduces material waste.



Cold runner mold


In contrast to a hot runner mold, a cold runner mold has a runner system that is not 

heated. This can result in more material waste, as the runner system needs to be 

removed from the molded part after injection.



Family mold


A family mold is designed to produce multiple parts simultaneously, using multiple 

cavities within the mold. This is useful for high-volume production and can reduce costs.



Insert mold

An insert mold allows for the insertion of pre formed components, such as metal inserts, into the mold before the injection process. This is commonly used for parts that require additional strength or functionality.




This type of mold is used to combine multiple materials or colors into a single molded 

part. It typically involves molding one material over another to create a finished product

with enhanced aesthetics or functionality.



Stack mold


A stack mold consists of multiple mold surfaces stacked on top of each other, allowing 

for multiple parts to be produced in the mold at the same time. This can significantly 

increase production efficiency.


Request a quote today for plastic molded parts from KYLT.

KYLT Plastic Injection Molding Workshop & Facility

Plastic Injection Molding Machines


Grinding Machines


Plastic Crusher


Mold Assembly Table


Get a Free quote for your new plastic injection molding project.

Applications of Plastic Injection Molding

Plastic Molded Packaging

Various plastic packaging items like bottles, jars, caps, and containers are manufactured using injection molding. These can be used for food packaging, personal care products, cleaning supplies, etc. In KYLT, we provide painting, pad printing, silk printing, UV coating for plastic packing.

Plastic Toys

Plastic toys, such as action figures, dolls, cars, model train/cars and building blocks, are often made using injection molding.

Plastic Medical Devices Parts

In KYLT, most common medical devices that often utilize plastic molded parts are Surgical instruments: Plastic molded handles and components and their molds.

Plastic Molded Household Items

Items like kitchen utensils, furniture components, storage boxes, hangers, and various other household products are often manufactured using injection molding.

Consumer Electronics Plastic Molding Spare Parts

Plastic parts in consumer electronics, such as remote controls, headphones, smartphone cases, and game controllers, are frequently made using injection molding.

Plastic Sporting Goods

Many plastic sporting goods, such as helmets, protective gear, and sports equipment components, are manufactured using injection molding.

Plastic Personal Care Products

Plastic product examples within the personal care industry include toothbrushes, hairbrushes, razors, makeup containers, and dispensers.

Furniture Plastic Parts

Plastic furniture components such as chair frames, table legs, and interlocking parts are often produced using injection molding.

Electronic Plastic Components

Many plastic parts used in electronic devices, such as computer keyboards, phone cases, power adapters, and connectors, are made through injection molding.

Mechanical parts (including gears)

Examples of mechanical parts that can be produced using plastic injection molding: Gears, Bearings, Housings and enclosures, Connectors and terminals, Handles and knobs, Prototyping components, Structural components, Seals and gaskets, Springs, Fasteners etc.

Automotive Plastic Molded Parts

Numerous plastic parts in automotive vehicles, including interior components like dashboards, steering wheels, and door panels, as well as exterior parts like bumpers and wheel covers, are produced using injection molding.

Materials of Plastic Injection Molding

Discover a comprehensive resource on resin alternatives for ABS, PC, PP, and other widely utilized molded plastics.









Acetal Homopolymer/Delrin







































PMMA (Acrylic, Plexiglas)























Plastic Injection Molding Parts Surface Finishes

The choice of surface finishes depends on the specific requirements of the plastic injection molded products and the desired aesthetics. KYLT, as the “One-stop, Full services” Plastic molded parts manufacturer can provide a range of surface finish options to meet the customer's needs.







Smooth or glossy finish


This is achieved by polishing the mold surface before injection. It results in a shiny and  reflective appearance.



Matte finish


This involves using a textured mold surface or applying a matte coating to create a  

non-eflective surface. It can help to hide imperfections and provide a more natural appearance.



Texture finish


Different textures can be added to the mold surface, such as leather, wood grain, or stippling. 

These textures enhance the visual appeal and feel of the product.



Color finish


Plastic injection molded parts can be colored using various methods such as pigmentation, 

painting, or coating. This allows for customization and branding options.



Polished finish


Specially designed polishes and buffing methods can be used to give the part a smooth and 

shiny appearance.



Bead blast finish


Small glass or ceramic beads are blasted at high pressure onto the molded part's surface. 

This process creates a uniform, matte finish with a slightly rough texture.



Laser etching or engraving


Laser technology can be used to create intricate designs or patterns on the plastic part's 

surface. This can be useful for branding purposes or adding product-related information.





The desired texture or pattern is directly added to the mold itself, resulting in a consistent and durable surface finish.


Low-volume & Scale-up Production Services for your plastic injection molding products.

Quality Control of Custom Plastic Molded Products

According to the application requirements of your injection molded parts, you can choose from the following options when quoting for injection molding.
Quality Inspections of Plastic Molded Parts
1. Manufacturability Feedback 
2. Scientific molding process development report 
3. CMM inspection 
4. machine monitoring during plastic injection process 
5. First article inspection
Post processing of Plastic Molded Parts
1. Mold Texture (Mold Surface Treatment) 
2. Thread insert 
3. Transfer printing (Pad printing, Silk printing) 
4. Painting & Coating (Colorful painting, UV coating) 
5. Laser engraving 
6. Assembly services

KYLT - Custom Plastic Injection Molding Parts Supplier and Manufacturer.

The Advantages of Plastic Injection Molding

Plastic injection molding is a reliable, efficient, and cost-effective method for producing high-quality plastic parts. it has several advantages, including:


High Efficiency
Plastic injection molding is a highly efficient process, allowing for the production of large quantities of parts in a relatively short amount of time.




The process of plastic injection molding can be used to produce a wide range of parts with varying 

sizes, shapes, and complexities.





The initial cost of tooling for plastic injection molding can be high, but the cost per part decreases 

as the quantity produced increases, making it a cost-effective solution for large production runs.





The use of advanced technology and precise control systems in plastic injection molding ensures 

that each part produced is consistent in terms of size, shape, and quality.



Reduced Waste


The process of plastic injection molding generates minimal waste as the excess material can be 

recycled and reused.


FAQs About Plastic Injection Molding

  • Q What is plastic injection molding?

    A Plastic injection molding is a manufacturing process that involves injecting molten plastic material into a mold cavity, where it cools and hardens to form a specific shape or part.
  • Q What are the plastic injection molding processes?

    A The plastic injection molding process is a manufacturing technique that involves injecting molten plastic into a mold cavity. This mold is typically made from durable materials like steel or aluminum. The molten plastic is injected under high pressure, which helps to fill the mold completely and evenly. Once the plastic has cooled and solidified, the mold is opened, and the finished plastic part is ejected. This process is widely used in various industries to produce a wide range of plastic products.
  • Q What are the advantages of plastic injection molding?

    A Plastic injection molding has several advantages, some of which include: High Efficiency, Versatility, Cost-effective, Wide range Materials selection, Reduced waste.
  • Q What materials can be used in plastic injection molding?

    A Plastic injection molding can use a wide range of materials, including thermoplastics like ABS, polycarbonate, polypropylene, and nylon, as well as thermosetting plastics like epoxy and phenolic. The choice of material depends on the specific requirements of the product being manufactured, such as strength, durability, and heat resistance. Additionally, various additives can be used to modify the properties of the plastic material, such as colorants, UV stabilizers, and flame retardants.
  • Q What is the typical cost of plastic injection molding?

    A The typical cost of plastic injection molding can vary depending on several factors such as the complexity of the part, the size of the production run, the type of material used, and the tooling requirements. Generally, the cost per unit decreases as the production quantity increases.

KYLT Plastic Injection Molding Parts & Molds Manufacturing Services: cheap, fast, quality, in-time.

0086 15195010186
Gounan Industrial Park, Changzhou, Jiangsu