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Case Study: Automotive Door Check Arm Molding Solution

Project Overview
This case study highlights the production of automotive door check arms, demonstrating LIZHU Machinery’s expertise and customized engineering capabilities in the field of automotive component injection molding. From product design and mold integration to automation systems, LIZHU Machinery is dedicated to delivering high-efficiency and high-precision vertical injection molding solutions tailored to client requirements.

Technical Specifications
Machine Model: LZ-LB2500-2R Rotary Table Vertical Injection Molding Machine
EachMoldShotWeight: 375g
ScrewDiameters: 55mm、60mm、65mm（allowing an injection weight range of 560g–780g.）
Equipped with a full servo system, including servo rotary table and servo ejector.
Rotary table diameter: 1.8m
Machine weight: 24 tons
Machine dimensions: L4.2m × W3m × H6.1m

Production Capacity

Operation Mode	Daily Output (pcs)	Monthly Output (26 days)	Quarterly Output	Annual
hours/day	6,912	179,712	539,136	2,156,544
24-hour shift	13,824	359,424	1,078,272	4,313,088

Material Used: POM
POM is a high-performance engineering thermoplastic widely used for automotive door check arms due to its excellent mechanical and tribological properties:

①High Wear Resistance	Minimizes friction and abrasion, significantly extending product lifespan.
②Dimensional Stability	Ensures precise door operation and prevents deformation.
③Self-Lubricating Property	Reduces noise and provides a smoother tactile feel.
④Superior Fatigue Resistance	Maintains mechanical integrity under long-term cyclic loading

Solution Highlights
①LowBaseRotary Table Design: The lowered working platform enhances operator accessibility and facilitates integration with robotic automation, improving both safety and production efficiency.
②Full Servo Drive System: Delivers energy-efficient, high-precision control over injection and clamping motions, ensuring stable and consistent performance.
③European-Standard Manufacturing: Both the mechanical and electrical systems comply with CE and EU safety standards, guaranteeing operational reliability.
④Smart Production Integration: Compatible with robotic systems and visual inspection units to form a fully automated production line for 24/7 operation.

This customized molding solution showcases LIZHU Machinery’s commitment to combining advanced engineering with intelligent manufacturing, providing customers with reliable, efficient, and sustainable production capabilities.

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