Design and Optimization of the Injection Mold for Rubber Stators in Oil Production Single-Screw Pumps

Area of Science:

• Polymer Engineering
• Manufacturing Processes
• Materials Science

Background:

• Single-screw pump rubber stators are critical components in oil production.
• Injection molding is a key manufacturing process for these stators.
• Existing methods face challenges in achieving optimal quality and minimizing defects.

Purpose of the Study:

• To optimize the injection mold design for single-screw pump rubber stators.
• To identify the most influential process parameters affecting stator quality.
• To enhance the overall quality and performance of the manufactured rubber stators.

Main Methods:

• Utilized MOLDFLOW2023 analysis for post-design simulations.
• Determined optimal gate position and gating system design.
• Analyzed the impact of key processing parameters on product quality.

Main Results:

• Identified mold temperature, melt temperature, and injection time as most influential factors.
• Established optimal settings: 100°C mold temp, 70°C melt temp, 30s injection time, 10s holding time, 60 MPa holding pressure.
• Achieved a 1.8-2.7% decrease in volume shrinkage and a 1.3-0.9% decrease in sink index.

Conclusions:

• The optimized injection molding process significantly enhances rubber stator quality.
• The study advances injection molding technology for specialized components.
• Improved stator quality contributes to more reliable oil production equipment.