In the manufacturing process of cleaning equipment, the quality of plastic parts directly affects the durability, sealing and user experience of the entire machine. Located in the YISHENG manufacturing base in Dingyuan Intelligent Manufacturing Industrial Park, Anhui, the rotational molding workshop uses a complete nine-step process system to transform powder raw materials into high-strength, one-piece key components. For OEM customers looking for stable OEM cooperation, this full-process self-made rotational molding capability means shorter delivery cycles, more controllable quality standards and more flexible customization responses.
The first step in the YISHENG rotational molding process begins with custom molding. In response to the structural requirements of different types of sweepers and floor washers, the workshop is equipped with special rotomolding molds to ensure product appearance and assembly accuracy. The value to OEM customers is that YISHENG can quickly develop or adjust molds according to customers' differentiated design needs, supporting customized production from appearance to functional structure. There is no need for customers to find separate mold suppliers, which greatly reduces communication costs and management difficulties.
At the same time, high-quality LLDPE plastic powder (linear low-density polyethylene) is selected as the raw material for rotational molding parts. This material has good impact resistance, corrosion resistance and processing fluidity, which provides a basic guarantee for the performance of the finished product. YISHENG's strict control of raw materials ensures the consistency of physical properties of each batch of products during mass production - this is the quality stability issue that OEM customers are most concerned about in large-scale purchases.
Before feeding materials, workers will carefully clean the mold to remove residual impurities and ensure that the mold cavity is clean. Then enter the key link - spraying Teflon pressure-resistant coating on the mold. Teflon (PTFE) coating can form a non-stick surface, effectively preventing plastic from sticking to the mold during high-temperature molding, while improving the demoulding efficiency and durability of the mold. For OEM customers, this detailed process means fewer surface defects and higher yields, which directly reduces the after-sales risks and return costs faced by customers due to quality issues.
After the preparation is ready, add a certain amount of LLDPE plastic powder into the mold, and then send the mold to the large rotational molding machine. After the equipment is started, the rotomolding machine heats and rotates the mold. The mold continues to rotate in the biaxial direction in the heating furnace, so that the molten plastic powder evenly adheres to the inner wall of the mold under the action of centrifugal force and gravity. In this process, precise control of temperature and rotational speed directly affects the uniformity of wall thickness, which is the core technology of the rotational molding process.
The guarantee for OEM customers is that YISHENG uses mature process parameter systems and operating specifications to ensure that the same mold maintains consistent wall thickness in different batches of production, avoiding strength reduction or assembly interference problems caused by uneven wall thickness. This means that customers do not need to frequently carry out incoming material inspection and sampling inspection ratios, which greatly improves the efficiency of supply chain management.
After the heating molding is completed, the mold enters the natural cooling stage. Through rotational molding and natural cooling after demoulding, the plastic parts can be shaped during the gradual cooling process to avoid internal stress or deformation caused by rapid cooling. There are usually a small amount of burrs on the edge of the semi-finished product after demoulding, and workers need to fine-tune the burrs of the rotomolded semi-finished product to ensure that the installation surface is flat and smooth to meet subsequent assembly accuracy requirements.
Finally, the inspected finished products are transferred to the rotomolded finished product storage area and stored in an orderly manner by category, waiting to enter the final assembly line or the waiting area for shipment. Delivery significance to OEM customers: Its own rotational molding workshop and complete warehousing management system enable YISHENG to flexibly control inventory levels and respond to the peak and trough demands of customer orders. Whether it is a trial production order of small batches and multiple varieties, or a stable supply of large quantities, YISHENG can rely on this closed-loop production capability to ensure on-time delivery.
Taken together, the complete process chain of YISHENG's rotational molding workshop brings four core values to OEM customers: first, supply intensification - from mold development to finished product output, all is completed in-house, and customers only need to connect to one foundry node to obtain complete parts; second, quality controllability - each process has standardized operating procedures and effective regulations. Avoid the risk of quality fluctuations that are common in outsourcing processing; third, cost competitiveness - the self-made model eliminates the profit superposition and logistics turnover costs of outsourcing, providing customers with a more cost-effective purchasing solution; fourth, delivery guarantee - complete independent control from raw material stocking to production line scheduling, ensuring that orders are advanced as planned even in peak market seasons.
From mold customization, material input to molding finishing, YISHENG rotational molding workshop relies on this complete nine-step process to continue to output high-quality, highly consistent cleaning equipment plastic parts for domestic and foreign OEM partners, helping customers establish a reliable product reputation in the terminal market.
