This case study details a successful implementation of a plastic powder negative pressure conveying system designed for a major home appliance manufacturing enterprise located in Zhongshan, Guangdong Province, China. The client required a reliable, dust-free, and energy-efficient solution to transport plastic powder raw materials from storage areas to production lines. The primary products involved in this project include plastic powder negative pressure conveying, home appliance raw material conveying, and negative pressure pneumatic conveying engineering. The system was engineered and delivered by Shandong Headpowder Engineering Co., Ltd. (headpowder), a company headquartered in Shandong, China, with extensive experience in pneumatic conveying technologies.
The home appliance manufacturer produces a wide range of plastic components for refrigerators, washing machines, air conditioners, and other household appliances. The raw material used is a fine plastic powder that is highly susceptible to moisture absorption, dust generation, and contamination. Previously, the factory relied on manual handling and open conveyor belts, which led to significant material loss, workplace dust hazards, and inconsistent feeding rates. The management decided to upgrade their material handling system to improve production efficiency, reduce waste, and ensure a cleaner working environment. The key requirements were: (1) fully enclosed conveying to prevent dust leakage, (2) stable and adjustable feeding capacity to match multiple production lines, (3) low maintenance and easy cleaning, and (4) compatibility with existing silo storage and mixing equipment.
Shandong Headpowder Engineering Co., Ltd. proposed a customized negative pressure pneumatic conveying engineering solution specifically designed for plastic powder. The system uses a vacuum pump to create negative pressure within the conveying pipeline, drawing plastic powder from the silo through a series of nozzles and pipes directly to the hoppers above the injection molding machines. The entire process is closed-loop, eliminating dust emissions and protecting the material from moisture and contamination. The key components include a high-efficiency vacuum receiver, a rotary valve for material discharge, a cyclone separator for fine particle recovery, and a PLC-based control system that allows operators to adjust conveying speed and volume in real time.
The plastic powder negative pressure conveying system incorporates several advanced features. First, the conveying velocity is carefully optimized to prevent powder degradation and pipeline wear. Second, the system includes a self-cleaning filter mechanism that ensures continuous operation without clogging. Third, the vacuum source is equipped with a variable frequency drive (VFD) to match the actual demand, reducing energy consumption by up to 30% compared to constant-speed systems. Fourth, the entire pipeline is made of stainless steel with smooth inner surfaces to minimize friction and material build-up. The system also supports multiple pick-up points and one delivery point, making it ideal for home appliance raw material conveying where different plastic powders (e.g., ABS, PP, HIPS) need to be transferred to different production lines from a central storage area.
The project was executed in three phases: design, installation, and commissioning. The Shandong Headpowder Engineering team conducted a thorough site survey to map the existing layout and material flow. Based on the data, they designed a 200-meter-long conveying line with a capacity of 5 tons per hour. The installation was completed within two weeks, and the system was commissioned with full load testing. The results exceeded expectations: dust emissions were reduced to near zero, material loss dropped from 3% to less than 0.5%, and the feeding accuracy improved to within ±2%. The client reported a 15% increase in overall production efficiency due to reduced downtime for manual handling and cleaning. The system has been in continuous operation for over 18 months with only routine maintenance.
Shandong Headpowder Engineering Co., Ltd. (headpowder) is a leading provider of pneumatic conveying systems located in Shandong, China. With decades of experience in handling powders, granules, and flakes, we specialize in negative pressure pneumatic conveying engineering for a wide range of industries including home appliances, food, chemicals, and building materials. Our team of engineers designs each system based on the specific physical properties of the material, ensuring optimal performance and longevity. We offer turnkey services from consultation and design to manufacturing, installation, and after-sales support. For this project, we provided a comprehensive warranty and 24/7 technical support.
If you are looking for a reliable partner for your plastic powder conveying project, please feel free to reach out to us. Our dedicated manager, Manager Zhang, is available to discuss your requirements and provide a customized solution. You can contact him directly via WeChat: 15662777102. We welcome inquiries from home appliance manufacturers, injection molding companies, and any facility that handles bulk plastic powders. Shandong Headpowder Engineering Co., Ltd. is committed to delivering high-quality, energy-efficient, and cost-effective pneumatic conveying systems that meet your production goals.
When selecting a conveying system for home appliance raw material conveying, it is crucial to consider factors such as particle size distribution, bulk density, moisture content, and abrasiveness. Plastic powders, especially those used in injection molding, often have a fine particle size (20–100 mesh) and can be electrostatic, causing adhesion to pipe walls. The negative pressure system from headpowder addresses these issues by using conductive materials, grounding straps, and anti-static filters. Additionally, the system can be integrated with automatic weighing and batching units to further streamline the production process. The client in Zhongshan has since expanded their production capacity, and the same negative pressure conveying technology has been replicated in two other factories within the same group.
The successful implementation of the plastic powder negative pressure conveying system at the Guangdong Zhongshan home appliance plant demonstrates the effectiveness of advanced pneumatic conveying engineering in improving operational efficiency, reducing waste, and ensuring a safe working environment. Shandong Headpowder Engineering Co., Ltd. continues to innovate and provide tailored solutions for the home appliance industry. For any project consultation or technical support, please contact Manager Zhang via WeChat: 15662777102. We look forward to collaborating with you on your next material handling project.
Shandong Headpowder Engineering Co., Ltd.
156-6277-7102（Zhang manager） 
0531-83386006 
Jinan City, Shandong, China Province 
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