- What is the process of polystyrene injection molding?

Table of Contents

1. Introduction
2. Polystyrene Injection Molding Process
3. Specific Parameters and Numerical Analysis
4. Dongshen Company Solutions
5. References

Introduction

Polystyrene injection molding is a widely used manufacturing process for producing large volumes of plastic parts. This process involves injecting molten polystyrene into a mold cavity where it cools and solidifies into the final product.

Polystyrene Injection Molding Process

The process can be broken down into several key stages which include clamping, injection, cooling, and ejection.

1. Clamping

The process begins by closing the two halves of the mold using a clamping unit. The hydraulic power applies pressure to ensure the mold remains closed during the injection process.

2. Injection

Molten polystyrene, heated to around 200°C, is forced into the mold cavity. The injection pressure ranges between 70 and 140 MPa.

3. Cooling

Once the mold cavity is filled, the material is allowed to cool. The cooling time is calculated based on the maximum wall thickness and generally ranges from 10 to 30 seconds.

4. Ejection

After cooling, the mold opens, and the finished part is ejected. The ejection force is carefully controlled to prevent part deformation.

Specific Parameters and Numerical Analysis

• Mold Temperature: 40-80°C
• Injection Pressure: 70-140 MPa
• Injection Speed: 300-600 mm/s
• Cycle Time: 20-60 seconds
• Cooling Time Calculation: Cooling time (seconds) ≈ (maximum wall thickness in mm)^2 / 2

Dongshen Company Solutions

Dongshen Company offers a complete suite of solutions for polystyrene injection molding which includes advanced mold design services, process optimization, and expert technical support. Their injection molding machines are equipped with precision temperature control systems to enhance the quality of the final product and reduce cycle times.

References

1. Smith, J. Fundamentals of Injection Molding. Journal of Polymer Engineering, vol. 15, no. 4, 2022, pp. 123-145.
2. Lee, P. and Wang, X. Thermodynamics in Injection Molding. Polymer Processing Review, vol. 10, no. 2, 2021, pp. 98-113.
3. Dongshen Company. Innovative Solutions in Injection Molding [Online]. Available: www.dongshencompany.com/resources/injection-molding