Injection Mold for Plastic Lamp Holder Inner Thread Box

1. Introduction

The plastic lamp holder inner thread box mold is designed for manufacturing precision-threaded plastic components used in electrical lamp holders. These parts serve as the insulating and protective housing for lamp sockets, ensuring secure bulb connections, electrical safety, and durability.

With advanced injection molding technology, these components are produced with high precision, heat resistance, and electrical insulation properties, making them ideal for use in household lighting, industrial fixtures, and automotive lighting systems.

2. Characteristics of Plastic Lamp Holder Inner Thread Box Molds

• High Precision Internal Thread Formation:
• Ensures tight bulb fitting and secure electrical contact.
• Compatible with E27, E14, and other standard lamp holder sizes.
• Heat & Electrical Insulation:
• Made from flame-retardant and high-temperature-resistant plastics such as Bakelite, PBT, or PA66 with GF.
• Durable & Wear-Resistant Design:
• Prevents thread stripping and deformation after multiple bulb replacements.
• Smooth Surface Finish:
• Guarantees easy bulb installation and removal.
• Optimized Mold Structure for Longevity:
• Hardened steel inserts ensure long-term mold durability.
• Efficient Cooling & Ejection System:
• Reduces cycle time and enhances production efficiency.

3. Manufacturing Process of Plastic Lamp Holder Inner Thread Box Molds

1. Mold Design

• 3D CAD Modeling (SolidWorks, UG, CATIA) ensures precise thread geometry and assembly fit.
• Mold Flow Analysis (Moldflow, Autodesk Simulation) prevents short shots, warping, and sink marks.
• Thread Forming Mechanism:
• Unscrewing Core Mold for internal thread demolding.
• Threaded Insert Design for durability and accuracy.

2. Mold Fabrication

• High-Precision CNC Machining:
• Ensures tight tolerances for thread accuracy.
• EDM (Electrical Discharge Machining):
• Used for fine details in threaded cavities.
• Texturing & Surface Treatment:
• Polishing or matte finishes to meet performance and aesthetic standards.

3. Injection Molding Process

• Material Selection:
• PBT (Polybutylene Terephthalate) + GF – High heat resistance and electrical insulation.
• PA66 + GF (Glass Fiber Reinforced Nylon) – Strong mechanical properties and durability.
• Bakelite (Phenolic Resin) – Excellent flame resistance and heat stability.
• Injection Molding Cycle:
• Controlled temperature & pressure to prevent thread distortion.
• Optimized cooling system for reduced cycle times.
• Ejection & Post-Processing:
• Rotating core or collapsible core mechanism for thread removal.
• Secondary processing like threading verification or assembly with electrical contacts.

4. Quality Control & Inspection

• Thread Tolerance & Precision Check:
• Ensures smooth screwing and unscrewing of light bulbs.
• Heat & Flame Resistance Testing:
• Meets electrical safety standards (UL94 V-0, IEC requirements).
• Mechanical Strength & Durability Testing:
• Prevents cracks, deformation, and wear over time.
• Electrical Insulation Testing:
• Ensures safe performance in high-voltage applications.

4. Applications of Plastic Lamp Holder Inner Thread Boxes

• Household & Commercial Lighting: Standard E27, E14, and B22 bulb sockets.
• Industrial & High-Temperature Environments: Heat-resistant lamp holders for machinery lighting.
• Automotive & Specialty Lighting: Used in vehicle headlamps and signal lights.
• Smart Lighting Systems: Compatible with LED fixtures and IoT-enabled lighting solutions.

5. Conclusion

Plastic lamp holder inner thread box molds ensure high precision, durability, and electrical safety in lamp socket manufacturing. With advanced thread-forming mechanisms, high-performance materials, and strict quality control, these molds support the efficient mass production of reliable and heat-resistant lighting components for various applications.Contact NeedMold,Email us: manager@needmold.com