Custom Vacuum Forming Services

SealWerks offers specialized vacuum forming services designed to produce precision 3D thermoplastic parts. Our custom vacuum forming services excel in creating high-quality plastic components with detailed precision and controlled tooling costs. With our ISO-certified manufacturing processes, we cater to industries with stringent hygiene standards, such as medical devices and food service packaging, ensuring consistent quality and reliability.

Thermo Vacuum Forming

What is Vacuum Forming?

Vacuum forming relies on a vacuum to draw a thermoplastic sheet over and into a mold, removing trapped air so the material conforms to the mold’s precise shape and detail. This technique is ideal for creating detailed, custom parts in various applications, offering a cost-effective and efficient solution for producing components with both flexible and rigid characteristics. While vacuum forming uses a slightly different process, it renders similar results to thermoforming.

Vacuum forming is an essential manufacturing process for creating a diverse array of products across various industries. This method produces vacuum-formed parts that are both functional and aesthetically pleasing. By utilizing thermoplastic parts, companies can achieve flexible and rigid solutions tailored to specific needs. These applications benefit from the precision and versatility of vacuum forming, ensuring high-quality outcomes that meet strict industry standards.

Miniform

Advantages of Vacuum Forming

Vacuum forming offers unparalleled flexibility in manufacturing, allowing for the creation of intricate and complex flexible plastic shapes unattainable by many other processes. It is not only cost-effective but also known for its speed and efficiency, offering fast turnaround times to meet tight production schedules. SealWerks is capable of helping you with your next prototype to medium to large production runs. Expert manufacturers guide you through design, engineering, and production, leveraging industry knowledge to produce parts that meet precise specifications while eliminating waste and minimizing costs.

Vacuum Formed Parts & Product Applications

  • Consumer Goods Packaging: packaging for consumer goods such as blister packs, retail displays, and point-of-purchase packaging.
  • Medical Devices & Healthcare: Sterile housings and components for medical equipment, such as Inflatable cushions, patient positioning devices, or medical imaging equipment accessories. 
  • Automotive: Dashboards, door panels, and custom-fit covers for vehicles.
  • Consumer Electronics: Durable casings and parts for electronics.
  • Industrial Equipment: Protective housings and control panels for machinery.
  • Food Packaging Industry: Vacuum forming is used to create a variety of food packaging solutions, such as trays, clamshells, and containers that hold fresh meats, produce, and ready-to-eat meals.
  • Agricultural Applications: The process is employed to manufacture containers, trays, and growing modules (such as seedling trays), taking advantage of vacuum forming’s ability to form durable, customizable shapes suited to various agricultural needs.
  • Consumer Products and Appliances: Vacuum forming is applied in creating a range of household items, such as storage bins, refrigerator components, and casings for electronics, as well as toys and recreational products that benefit from durable, lightweight designs.
  • Aerospace and Defense: Vacuum forming offers lightweight solutions for interior components in aircraft, including panels and storage compartments, and is also valuable for rapid prototyping of components before final production.
  • Construction and Building Products: In this industry, vacuum forming produces panels, ceiling tiles, and decorative elements, and it is used to design custom fixtures and architectural models that enhance both functionality and design aesthetics in buildings.

Material Options

  • High-Impact Polystyrene (HIPS): Known for its rigidity and ease of forming, ideal for packaging and consumer goods.
  • Polycarbonate (PC): Offers high impact resistance, making it suitable for durable applications such as protective covers.
  • ABS (Acrylonitrile Butadiene Styrene): Provides excellent toughness and resistance, perfect for automotive and housing applications.
  • PETG (Polyethylene Terephthalate Glycol-Modified): Offers clarity and strength, ideal for medical devices and displays.
  • PVC (Polyvinyl Chloride): Renowned for its durability and versatility, PVC is ideal for creating lightweight yet robust vacuum-formed parts. Its resistance to various chemicals and environmental conditions makes it suitable for a wide range of applications, including industrial, automotive, and construction sectors.

How the Vacuum Forming Process Works:

  1. Mold Creation: Create a detailed tool or mold that reflects your part’s design, ensuring precise shape and structural integrity.
  2. Plastic Heating: Heat a thermoplastic sheet until it reaches a pliable state, prepared for molding into complex configurations.

  3. Vacuum Application: Employ vacuum pressure to draw the heated sheet snugly against the mold, forming the desired shape with high precision. The vacuum ensures air is evacuated effectively to eliminate imperfections.

  4. Stabilizing and Finishing:  Allow the formed part to stabilize, retaining its new shape. Trim and finish to exact specifications, ensuring seamless integration into its intended application.

Vacuum forming utilizes negative pressure, drawing air through tiny channels in the mold, especially at critical areas like corners. This ensures the flexible film precisely conforms to the mold’s shape. Once the film is formed around the mold, the vacuum gradually releases until the film is removed.

The vacuum starts from a central point on the mold and removes air between the mold surface and film, allowing it to adhere to complex shapes. Material type and thickness dictate forming limitations, yet vacuum forming often serves as a cost-effective alternative to pricier methods.

Key Considerations

  • Avoiding Webbing: Prevent excess material gathering at corners.
  • Stabilizing Time: Ensure adequate stabilizing time to avoid deformation.
  • Thickness Checks: Monitor material thickness throughout.
  • Residue Removal: Clean off any mold release agents.
  • Clarity Inspection: Ensure uniform clarity for transparent parts.

Typically, vacuum-formed parts have open sides, which can be enclosed by welding or heat sealing. Additional features can be attached to enhance functionality, such as for air or liquid containment.

Why Work with SealWerks?

At SealWerks, our commitment to delivering high-quality, custom vacuum forming services ensures that each part meets exacting standards for precision and reliability. 

Customization: Create parts tailored to specific size, shape, and design requirements to fit diverse applications.

Specialized Features: Choose items with specific properties, such as antistatic or conductive materials for specialized applications.

Production Scale: We cater to projects from small to large-scale, offering flexibility in order sizes with options for low minimum order quantities.

Engineering Support: Obtain guidance on material selection and the best manufacturing solutions with expert engineering assistance.

Contact us today to explore how we can help meet your unique project requirements.

Frequently Asked Questions

  1. What Equipment Is Used for Vacuum Forming?

    The vacuum forming process relies on specialized equipment, including a vacuum pump that removes air to ensure precise conformity to the mold.

  2. What Is the Best Material for Vacuum Forming?

    Commonly used materials include HIPS, ABS, and PETG, each selected based on its properties to suit specific application needs.

  3. What Are the Advantages of Vacuum Forming?

    Vacuum forming enables the creation of detailed and complex shapes, offers cost-effective manufacturing, and allows for quick production timelines, catering to both small-scale and large-scale needs.

  4. What Is the Difference Between Vacuum Forming and Thermoforming?

    Thermoforming involves heating and shaping plastic over a mold, while vacuum forming employs a vacuum to remove air from between the plastic and the mold, ensuring precision as the plastic takes on the shape and detail of the mold. Learn more about Thermoforming.

  5. How Can Vacuum Forming Enhance Product Marketability?

    Vacuum forming allows for customization in design, enabling unique shapes and features that stand out in competitive markets. By using vacuum-formed parts, manufacturers can produce lightweight, durable components with attractive finishes, enhancing the product’s aesthetic appeal and functionality, ultimately boosting consumer interest and marketability.

  6. What are the four stages of vacuum forming?
    • Clamping: Secure the plastic sheet in place to prevent movement during the process.
    • Forming: Use vacuum pressure to pull the flexible sheet over or into the mold, shaping it precisely.
    • Stabilization: Allow the formed plastic to stabilize, with the vacuum still running, retaining its new shape.