High Temperature Injection Molding Supplier In China

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High Temperature Injection Molding Manufacturer

Stebro Mold is a professional high temperature injection molding supplier in China, we use the Engel multi-shot injection molding machine to produce high-quality 2K plastic components. You won’t have to contact multiple providers when you work with us. You can have the advantage of a single-source plastics provider from idea to shelf.

Our services include:

  • 2D & 3D product design and optimization
  • The material selection
  • Rapid prototyping services
  • Cost-effective 2K mold solution
  • Mold Flow Analysis to optimize the mold design
  • In-house 2K mold manufacturing, tooling transfer, mold change, and maintenance
  • 2K mold trial
  • Pre-production runs and mass production
  • Part Assembly

We’re here to make sure your projects are a success! With our help, you’ll get 2K injection moulded parts done correctly from the start, within your budget, and on time.

Why Stebro Mold for High Temperature injection Molding

Customer Letters
Amanda Lee
CEO & Founder Crix
Catherine Gilbert
Director at Initech

High temperature injection molding plastics

High performance plastics are specially designed to withstand extreme temperatures and maintain their mechanical properties. These materials are commonly used in applications where standard plastics may not perform well due to elevated temperatures. Here’s a table of some high temperature materials used in injection molding:

High-temperature Injection molding application

High temperature injection molding materials find applications in various industries due to their excellent heat resistance, mechanical properties, and chemical resistance. Here are some specific industries and applications where these materials are commonly used:

1, Aerospace:

  • Engine components, such as seals, bearings, and bushings
  • Interior cabin parts, including lighting fixtures and control panels
  • Exterior parts, like wing leading edges, access panels, and heat shields

2, Automotive:

  • Under-the-hood components, such as air intake manifolds, throttle bodies, and engine covers
  • Electrical connectors, sensors, and wiring harnesses
  • Transmission and braking system components, like seals, gaskets, and brake pistons

3, Electronics:

  • Electrical connectors, sockets, and switches
  • Enclosures and housings for electronic devices

4, Oil and Gas:

  • Seals, gaskets, and downhole components for drilling and completion equipment
  • Pipes, valves, and fittings
  • Compressor and pump components

5, Medical Devices:

  • Surgical instruments and tools
  • Implantable devices, such as orthopedic and dental implants
  • Diagnostic equipment and components

6, Food Processing and Packaging:

  • Food processing equipment components, like valves, pumps, and conveyor parts
  • Food packaging materials
  • Non-stick coatings for cookware and baking equipment

High Temperature Injection molding advantages

  • Superior Heat Resistance
  • Enhanced Chemical Resistance
  • Greater Mechanical Strength
  • Improved Creep Resistance
  • Wider Application Range
  • Potential for Part Consolidation
  • Longer Component Life
  • Higher Performance Standards

Tips for high temperature plastics injection molding

Part Design

  • Plastic Material Selection: Considering factors such as heat resistance, chemical resistance, mechanical strength, and regulatory requirements.
  • Wall Thickness: Design parts with uniform wall thickness to avoid uneven cooling and potential warping. If varying wall thickness is necessary, make transitions as gradual as possible.
  • Draft Angles: Add draft angles to vertical walls and other features to facilitate easier ejection from the mold and minimize part damage.
  • Rib Design: Use ribs to increase the structural strength of the part without increasing wall thickness. Ensure the rib thickness is between 40% to 60% of the adjacent wall thickness to maintain proper cooling.
  • Corner and Edge Design: Use rounded corners and edges to reduce stress concentration and minimize the risk of cracking or failure due to temperature fluctuations.

Mold Design

  • Tooling steel: Mold material must be with excellent thermal conductivity and the ability to withstand high temperatures without deforming or losing its mechanical properties. Normally we use H13 steel.
  • Gate Location and Size: Position gates to promote balanced and even material flow, minimizing potential defects caused by differential cooling. Proper size gates to avoid excessive shear stress on the plastic.
  • Shrinkage and Warpage: Account for material shrinkage during the cooling phase and consider potential warping when designing the part and mold.
  • Cooling System: Design an efficient cooling system with heat transfer channels to maintain consistent mold temperatures and reduce cycle times. This will help prevent part defects caused by excessive heat, such as warpage or sink marks.
  • Venting: Adding venting in the mold design to allow air and gases to escape during the injection process. It can prevent defects and ensuring proper material flow.
  • Thermal Expansion: Consider the material’s thermal expansion characteristics when designing parts that will be exposed to temperature fluctuations, ensuring proper clearances and tolerances. 
  • Mold Temperature Control: Using thermocouples and heaters to monitor and maintain consistent mold temperatures throughout the molding process.
  • Mold Surface Finish: Ensure the mold surface finish is smooth and free of defects to prevent sticking or release issues with the high-temperature plastic.
  • Mold Maintenance: Design the mold with maintenance in mind, ensuring ease of disassembly, cleaning, and inspection. Regularly inspect and maintain the mold to prevent defects and ensure consistent part quality.

High temperature injection molding

  • Material Preparation: Material Preparation: Ensure the material is properly dried before molding, as it often hygroscopic and can absorb moisture. Follow the material data sheet for the drying time and temperature.
  • Mold Temperature: Set the mold temperature according to the material’s specifications to ensure proper flow and minimize defects. 
  • Melt Temperature: The melting points is high. Adjust the melt temperature to the recommended range. It will help to achieve optimal flow and minimize material degradation due to excessive heat.
  • Injection Speed: Set the injection speed based on the material’s viscosity and the part geometry. 
  • Injection Pressure: Use the appropriate injection pressure to fill the mold cavity completely without causing excessive stress on the material. Too much pressure can cause material degradation, while insufficient pressure may result in short shots or incomplete filling.
  • Hold Pressure and Time: Optimize the hold pressure and time to ensure proper packing of the material in the mold cavity. This will help to minimize sink marks and voids. 
  • Cooling Time: Optimizing the cooling time to get a proper part ejection and minimize cycle time. 
  • Process Monitoring: Monitoring the molding process and parameters, making adjustments as needed to maintain optimal conditions.

Stebro Mold provides end-to-end solutions for high temperature injection molding parts, covering everything from part design to mass production. Contact our knowledgeable design engineers, tooling, and production experts to help you get started on your next project.

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