Plastic Case Manufacturer: Custom Plastic Case in China

custom plastic parts, injection molding solutions, plastic injection molding service

Plastic case manufacturers are companies that specialize in producing a wide variety of plastic cases and containers to meet the needs of different industries and consumers. Known for their economical, lightweight, strong, and versatile nature, these plastic cases are often made from materials such as ABS, polypropylene, and polycarbonate. Plastic case manufacturers often offer personalized options including size, color, brand, etc. to meet specific requirements. These cases are primarily used to protect and store a variety of products, whether for professional or personal use, and are essential for safe transportation and storage of valuables.
plastic case

Custom Plastic Case Services and Options

When customizing your plastic case, you can choose options such as color, material, and pattern based on your specific needs and preferences. It’s worth noting that when customizing a case, it’s important to work closely with our custom case experts to ensure that the final product meets your exact requirements in terms of functionality, protection, and aesthetics, effectively serving your intended purpose. The following are the services and customization options we offer:

    • Custom Case Design
      Sungplastic offers in-house design services to create a custom plastic case tailored to your requirements. This includes designing the case dimensions, shape, and layout to fit your equipment or items precisely.
    • Material Selection
      You can choose from a range of plastic materials, such as ABS, polycarbonate, polypropylene, or high-impact materials, based on your desired durability, weight, and environmental factors.
    • Color Options
      Plastic cases offer a diverse range of standard color options. If you have a specific color requirement, we can typically accommodate it for larger quantities. Plastic cases can also be customized with mixed colors, such as a lid and base in different hues or a differently colored latch. This flexibility allows you to select options that align with your corporate color palette or logo.
    • Custom Graphics
      Numerous customers opt for full-color graphics to adorn both the exterior and interior of their cases. For instance, a company logo can be prominently displayed on the case’s exterior, while essential instructions can be printed on the interior lid.

      When it comes to branding, cases can be adorned with a full-color screen print, and for shorter production runs, a UV print offers a cost-effective solution. For larger quantities, an in-mould label, expertly integrated during the molding process, provides an exceptionally eye-catching and budget-friendly branding option.

    • Custom Interiors
      The interior of a plastic case can be precisely tailored to accommodate a wide array of items, with foam inserts being the preferred choice. Foam can be cut with CNC precision, die-cut, or laser-cut into any desired shape and size. Furthermore, it can be either plain black/grey or color-matched to align with your brand’s aesthetics. Alternatively, you can opt for a vacuum-formed insert, meticulously crafted to snugly fit and safeguard your products.

      Throughout this process, our primary focus remains on ensuring the security and professional presentation of your equipment, whether it’s in transit or on display.

    • Latch and Closure Options
      Depending on your preferences, you can choose from various latch and closure mechanisms, including double-throw latches, padlock holes, and more, to enhance security and ease of use.
    • Handle and Wheel Configurations
      For ease of transport, you can select handles, wheels, and telescopic handles that suit your specific needs. Some cases come with built-in wheels and extendable handles for rolling transport.
    • Stacking and Nesting Features
      If you require multiple cases for storage or transportation, cases can be designed with stacking and nesting features for compact and efficient storage when not in use.
    • Gaskets and Seals
      If your items require protection from moisture, dust, or environmental factors, cases can be equipped with gaskets and seals to create a watertight and airtight seal.
    • Anti-Static Protection
      If your case will be used for electronics or sensitive equipment, anti-static properties can be added to protect against electrostatic discharge (ESD).
custom plastic case services

Technology for Making Plastic Cases

There are a variety of techniques and processes for manufacturing plastic cases, depending on the complexity of the case, the materials required and the volume of production. Sungplastic’s production team will select the most appropriate method based on these factors to efficiently produce plastic cases that meet your expectations. Here are some common methods for making plastic cases:

Injection Molding:

    • Injection molding is one of the most common methods for producing plastic cases. It involves injecting molten plastic material into a mold cavity under high pressure. Once the plastic cools and solidifies, the mold is opened, and the finished case is ejected.
    • This process is suitable for producing high volumes of plastic cases with complex shapes and precise dimensions.

Blow Molding:

    • Blow molding is used to create hollow plastic cases, such as bottles and containers. It involves heating a plastic tube (parison) and then inflating it inside a mold to take its shape.
    • This method is ideal for producing large, lightweight cases with uniform wall thickness, like those used for packaging.


    • Thermoforming is a process in which a flat plastic sheet is heated and then formed over a mold using vacuum, pressure, or mechanical force. This is often used for producing shallow plastic cases, trays, and packaging.
    • It’s a cost-effective method for creating large, shallow cases with simple shapes.

Rotational Molding (Rotomolding):

    • Rotational molding is employed to make large, hollow plastic cases with a relatively simple design. It involves heating a mold while it rotates, causing the plastic material to evenly coat the mold’s interior.
    • This process is suitable for manufacturing cases for outdoor equipment, playground equipment, and large storage containers.


    • Extrusion involves forcing melted plastic through a die to create continuous shapes with a consistent cross-section. While it’s commonly used for making pipes and tubing, it can also be used to create plastic profiles used in case construction.

3D Printing:

    • 3D printing, particularly fused deposition modeling (FDM) or stereolithography (SLA), can be used for producing prototypes and low-volume custom plastic cases.
    • It’s advantageous for rapid prototyping and customization.

CNC Machining:

    • Computer Numerical Control (CNC) machining can be used to create plastic cases from solid blocks or sheets of plastic.
    • This method is suitable for producing low-volume, highly customized cases with precise dimensions.

Vacuum Forming:

    • Vacuum forming is similar to thermoforming but is often used for producing thin-walled cases and packaging. A heated plastic sheet is draped over a mold, and a vacuum is applied to force the plastic against the mold’s surface.

Plastic Case Applications

Plastic cases serve a multitude of purposes across diverse industries. They function as sample cases for sales representatives, display cases for showcasing various products, including electronics, and presentation cases for product launches and retail assistance. Additionally, they excel as tool and instrument cases, ensuring the secure storage, transport, protection, and promotion of your products. Plastic cases find extensive use not only in marketing and sales scenarios but also prove indispensable as protective packaging solutions in numerous sectors, including science and technology. Below are specific instances of plastic case applications in various industries:

Electronics and Technology:

    • Portable Electronics: Plastic cases protect electronic devices during transportation.
    • Testing Equipment: Sensitive electronic testing devices are safeguarded in durable plastic cases.
    • Tool Storage: Plastic tool cases secure electronic repair and maintenance tools.

Retail and Marketing:

    • Product Display: Plastic cases are used for displaying high-end merchandise like watches, jewelry, and electronics.
    • Promotional Kits: Marketing materials and product samples are packaged in custom plastic cases.

Healthcare and Medical:

    • Medical Instruments: Delicate medical instruments and devices are stored and transported in plastic cases.
    • First Aid Kits: Portable first aid kits are often housed in robust plastic cases.

Manufacturing and Industrial:

    • Tool Organization: Tools and equipment are organized in plastic cases for efficient use in manufacturing settings.
    • Component Storage: Delicate components and parts are stored in anti-static plastic cases to prevent electrostatic discharge.

Automotive and Transportation:

    • Diagnostic Tools: Plastic cases protect diagnostic tools and equipment used by automotive technicians.
    • Emergency Equipment: Roadside emergency kits and safety equipment are stored in plastic cases.

Military and Defense:

    • Weapon Storage: Firearms and ammunition are stored in secure plastic gun cases.
    • Field Equipment: Military personnel use rugged plastic cases to protect communication and medical equipment in the field.
    • Ammunition Transport: Plastic cases ensure safe transportation of ammunition.


    • Avionics: Sensitive avionics equipment is protected in plastic cases for aviation applications.
    • Space Exploration: NASA and other space agencies use specialized plastic cases for space missions.

Photography and Media:

    • Camera Equipment: Photographers use customized plastic cases to transport cameras, lenses, and accessories.
    • Audiovisual Gear: Film crews protect audio and video equipment in durable plastic cases.

Why Choose Plastic Cases from Sungplastic?

Our plastic cases are highly regarded by customers worldwide for their ingenious functionality, meticulous and appealing designs, user-friendliness, unwavering product security, and uncompromising durability. Besides our reputation forhigh-quality products, our proven reliability and competent service are convincing evermore customers to choose cases from Sungplastic.

When you opt for our plastic cases, you unlock a host of compelling advantages:

    • Sought After Brands:
      We take pride in providing plastic cases from some of the most sought-after brands in the industry. These brands are renowned for their unwavering commitment to quality, durability, and innovation, ensuring that the products you receive meet the highest industry standards.
    • Wide Size Selection:
      Our comprehensive assortment of plastic cases encompasses a broad spectrum of sizes to cater to a wide range of needs. Whether you require compact cases for personal use or spacious cases for industrial equipment, our size options are designed to meet your specific requirements.
    • Excellent Print Quality:
      We recognize the significance of presentation and branding. Our plastic cases exhibit exceptional print quality, enabling you to showcase your company logo, graphics, or instructions with remarkable clarity and precision. This elevates the overall aesthetic appeal and professionalism of your cases.

By choosing Sungplastic, you gain access to top-tier brands, a diverse array of case sizes, and impeccable print quality, ensuring that your plastic cases not only offer exceptional protection but also make a lasting impression. Your satisfaction and the effectiveness of your cases are our top priorities.

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