How Dingkun Screw Conquers Plastic, Chemical, and Food Industries with a "Building Block" Approach

As the global twin-screw extruder market steadily progresses towards the target of USD 1.611 billion by 2031 (source: Hengzhou Bozhi), China's high-end accessory sector is becoming a key breakthrough point for industry upgrades. In this opportunity-filled blue ocean, Chengdu Dingkun Machinery Co., Ltd., leveraging over two decades of military-grade technology accumulation, has developed core extruder components centered around screw thread elements, combining "hardcore performance" with "reliable quality." It has become an indispensable force of "Made in China" in the industry.

With military-grade precision, screw threads forge "hardcore performance."

The deep-rooted military-grade technological accumulation endows Dingkun Machinery's products with the unique advantages of "high reliability" and "strong adaptability." Since its establishment, Dingkun has consistently built its production quality management system based on the rigorous standards of military-grade manufacturing. From material selection to process refinement, every link continues the rigor and precision of military manufacturing.

In screw design, Dingkun breaks the limitations of traditional single structures by adopting a more flexible modular design. This not only allows for quick adjustments of screw combinations according to different material formulations but also flexibly adapts to the production needs of various industries such as plastics, chemicals, and food. The twin-screw structure significantly enhances extrusion efficiency by 30%-50%, easily handling high-output production scenarios. For heat-sensitive materials like PVC and ABS, Dingkun screws effectively reduce the risk of material degradation with military-grade temperature control precision, ensuring product molding quality. This positions Dingkun as a key player in the high-end modified plastics processing field.

In terms of parameter configuration, Dingkun screws also demonstrate "full-scene coverage" capabilities. The parallel twin-screw diameter range of 9-300mm can meet the production capacity needs from small batch experimental equipment to large-scale mass production. The scientifically set length-to-diameter ratio of 32:1-48:1 ensures that materials are thoroughly mixed within the screw, avoiding uneven mixing issues. The speed range of 100-1200rpm can be flexibly adjusted according to material characteristics, balancing production efficiency and product quality. Whether it is the uniform mixing of powder coatings or the efficient extrusion of wood-plastic materials, Dingkun screws can precisely match production requirements.

Materials and craftsmanship are the "core strengths" of Dingkun's screw threads. For different working conditions, Dingkun Machinery carefully selects various high-performance materials and adopts advanced processing techniques to ensure the wear and corrosion resistance of screws and thread components. In addition to the conventional W6Mo5Cr4V2 high-speed steel materials, Dingkun can also provide customized material solutions according to customer needs. For plastic processing, Dingkun uses 38CrMoAlA and 42CrMo alloy steel, which, after nitriding treatment, possess excellent wear and corrosion resistance. For high-wear conditions like engineering plastics with more than 50% fiber reinforcement, Dingkun employs a German-imported HIP material system, and a bimetallic coating (such as tungsten carbide) can significantly extend the screw's service life. In harsh scenarios like fluoroplastic (F46) extrusion and food processing, Hastelloy C-276 and stainless steel 316L are used as "corrosion guardians," effectively ensuring the long-term stable operation of the equipment.

In the processing technology, Dingkun adopts precision CNC machining and conducts repeated verification of the screw's concentricity, surface hardness, and wear resistance through advanced equipment, ensuring that each screw meets military-grade precision standards. This extreme pursuit of detail allows Dingkun screws to generate strong shear force during operation, achieving uniform melting and efficient plasticization of materials. At the same time, the unique thread design (such as single-headed, transition, correction, shear, and other thread elements) greatly enhances the dispersion of fillers/additives, providing strong support for the production of high-end composite materials.

100% pass rate commitment, building a quality defense line through full-chain quality control.

"Survive by quality, develop through technological innovation." This corporate value is fully reflected in the entire production process of Dingkun Screw. To fulfill the commitment of "100% qualified product delivery," Dingkun has established a comprehensive quality control system that spans from raw material testing to finished product shipment, safeguarding the rights of every customer with stringent standards.

Raw materials are the first line of defense for quality. All threaded element materials at Dingkun are selected from top domestic brands or professional suppliers of European twin-screw plastic machines. Moreover, after each batch of element materials arrives, they undergo verification through professional methods such as elemental analysis and metallographic testing to ensure that the material composition and mechanical properties fully meet design requirements.

The quality control in the production process leaves “no stone unturned.” All threaded components at Dingkun are processed using CNC machining, ensuring that the shapes and tolerances of the components are consistent with the design (original parts) requirements. The internal splines of the screw threads are 100% inspected using spline gauges to ensure that the dimensional accuracy and interchangeability of each internal spline are maintained, avoiding any assembly issues that could affect equipment operation. High-speed steel processed using European HIP technology is strictly manufactured according to the counterpart's heat treatment process, ensuring that its wear and corrosion resistance is equivalent to that of first-line foreign brands. In addition, Dingkun has established a comprehensive production quality traceability system, where each screw thread component has a dedicated "identity file" that records detailed information. In case of any issues, rapid tracing and timely resolution are possible.

The quality control craftsmanship of "Factory Excellence" has earned Dingkun Screws a solid reputation in the market, making it the "go-to choice" for many OEMs and end-user enterprises. Currently, Dingkun has established long-term partnerships with numerous well-known equipment manufacturers and end-user companies. On average, they can deliver 100 sets of threaded components per month, with sales revenue remaining stable at around 25 million+, earning wide market recognition.

35 days for fast delivery, efficient response helps clients seize market opportunities.

In today's fiercely competitive market environment, customers have increasingly high demands for the delivery efficiency of equipment parts. Dingkun deeply understands customer needs and, through a comprehensive supply chain management and production scheduling system, has achieved the service commitment of "same-day shipment for commonly used components and rapid delivery of new products within 35 days," empowering customer development with efficient responses.

Dingkun has established a vast inventory system for commonly used components. For screw models with high market demand, they prepare stock in advance to ensure that orders can be shipped promptly after being placed by customers. Additionally, Dingkun relies on detailed technical data from domestic and international OEMs and specialized fixtures to quickly respond to customers' personalized needs. When customers request custom specifications for screws, Dingkun's R&D and production teams swiftly coordinate, efficiently advancing the process from design confirmation to raw material procurement and production. This compresses the delivery cycle to 35 days, significantly faster than the industry average.

From military-grade technology accumulation to a 100% quality assurance commitment, and efficient service with 35-day rapid delivery, Dingkun Machinery uses screw thread products as a link, adhering to the business philosophy of "professionalism, integrity, innovation, and win-win." The company continuously drives the quality upgrade of twin-screw extrusion equipment. In the future, with the advancement of the greening of the plastics industry and the high-end trend of chemical equipment, Dingkun will continue to focus on screw technology research and development, providing higher quality products and services to inject "Dingkun energy" into China's twin-screw extrusion equipment industry, steadily advancing towards the goal of becoming an "industry-leading enterprise."

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